Document Information


PMID 15081582  (  )
Title Neuroinflammation, COX-2, and ALS--a dual role?
Abstract Although the root cause of many neurodegenerative diseases is unknown, neuroinflammation may play a key role in these types of disease, including amyotrophic lateral sclerosis (ALS). In the context of neurodegeneration, it is unclear if the disease is propagated through inflammation, or whether in contrast, evidence of inflammation reflects an attempt to protect against further cellular injury. Inflammatory pathways involving the cyclooxygenase (COX) enzymes and subsequent generation of prostaglandins are potential target sites for treatments to halt the progression of ALS. In the CNS, COX enzymes are localized to neurons, astrocytes, and microglia and can be induced under various conditions. In addition, there appears to be a dual role for the prostaglandin products of COX enzymes in the nervous system. Some prostaglandins promote the survival of neurons, while others promote apoptosis. In this review, the pathways of COX activity and prostaglandin production form the center of the debate regarding the dual nature of neuroinflammation. We will also discuss how this duality may affect future treatments for neurodegenerative diseases such as ALS.

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Targets by SciMiner Summary

HUGO ID Symbol Target Name #Occur ActualStr
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)220COX | COX-2 | cox 2 | COX-dependent |
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)14COX-1 |
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))12SOD1 | mSOD1 | SOD1-expressing | superoxide dismutase |
11892TNFtumor necrosis factor (TNF superfamily, member 2)3tumor necrosis factor | TNF |
5973IL13interleukin 133il 13 | IL-13 |
6018IL6interleukin 6 (interferon, beta 2)2IL-6 | il 6 |
1504CASP3caspase 3, apoptosis-related cysteine peptidase2caspase 3 |
5962IL10interleukin 102IL-10 | il 10 |
6014IL4interleukin 42IL-4 | il 4 |
6204JUNjun oncogene2c jun | c-Jun |
6001IL2interleukin 22il 2 | IL-2 |
6025IL8interleukin 82IL-8 | il 8 |
7794NFKB1nuclear factor of kappa light polypeptide gene enhancer in B-cells 1 (p105)1NF-kappaB |
1516CATcatalase1catalase |
6886MAPK9mitogen-activated protein kinase 91SAPK |
8723SERPINA5serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 51protein c inhibitor |
4931HLA-Amajor histocompatibility complex, class I, A1MHC |
9236PPARGperoxisome proliferator-activated receptor gamma1peroxisome proliferator activated receptor gamma |
7873NOS2Anitric oxide synthase 2A (inducible, hepatocytes)1nitric oxide synthase |
6881MAPK8mitogen-activated protein kinase 81JNK |
8053NUDT6nudix (nucleoside diphosphate linked moiety X)-type motif 61bFGF |
3676FGF2fibroblast growth factor 2 (basic)1basic fibroblast growth factor bfgf |
9594PTGER2prostaglandin E receptor 2 (subtype EP2), 53kDa1EP2 |
5344ICAM1intercellular adhesion molecule 1 (CD54), human rhinovirus receptor1ICAM-1 |
7808NGFnerve growth factor (beta polypeptide)1nerve growth factor |

 


Targets by SciMiner Full list

HUGO ID Symbol Name ActualStr Score FlankingText
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Inflammatory pathways involving the cyclooxygenase (COX) COX enzymes and subsequent generation of prostaglandins are potential target sites
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3In the CNS COX enzymes are localized to neurons astrocytes and microglia and can
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3to be a dual role for the prostaglandin products of COX enzymes in the nervous system
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3In this review the pathways of COX activity and prostaglandin production form the center of the debate
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3many aspects to neuroinflammation the pathways involving the cyclooxygenase (COX) COX enzyme and subsequent generation of prostaglandins clearly play a role
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3In this review the COX and prostaglandin pathways are used to frame the debate regarding
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3The significance of the COX pathway having both positive and negative outcomes in neurodegenerative disease
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX prostaglandins and neuroinflammation
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Cyclooxygenase (COX) COX is the rate-limiting step in the production of prostaglandins
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Arachidonic acid is the principal substrate for COX ( O'Banion 1999
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3There are two distinct COX isoenzymes known as COX-1 and COX-2 that are 65% homologous
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3There are two distinct COX isoenzymes known as COX-1 and COX-2 that are 65% homologous
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8There are two distinct COX isoenzymes known as COX-1 and COX-2 that are 65% homologous
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8There are two distinct COX isoenzymes known as COX-1 and COX-2 that are 65% homologous
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3COX-1 is constitutively expressed in most tissues and produces prostaglandins that
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Conversely COX-2 was initially characterized as an inducible enzyme that is expressed
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 is now known to be constitutively expressed in the kidney
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Many cellular factors induce COX-2 expression including multiple growth factors cytokines interleukin (IL)-1_amp_#x3b2; IL -1_amp_#x3b2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8One transcription factor that influences COX-2 expression following exposure to these cellular factors is NF-_amp_#x3ba B
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 has an NF-_amp_#x3ba B binding site in its promoter region
5344ICAM1intercellular adhesion molecule 1 (CD54), human rhinovirus receptorICAM-10.3promoter region that is shared with other inflammatory mediators including ICAM-1 IL-2 IL-8 and complement ( Baldwin 1996 and Schmedtje et
6001IL2interleukin 2IL-21.3region that is shared with other inflammatory mediators including ICAM-1 IL-2 IL-8 and complement ( Baldwin 1996 and Schmedtje et al.
6025IL8interleukin 8IL-81.3that is shared with other inflammatory mediators including ICAM-1 IL-2 IL-8 and complement ( Baldwin 1996 and Schmedtje et al. 1997
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Specific inhibition of COX-2 upregulation can be achieved by factors that inhibit NF-_amp_#x3ba B
6014IL4interleukin 4IL-41.3achieved by factors that inhibit NF-_amp_#x3ba B activity such as IL-4 IL-10 and IL-13 and glucocorticoids ( O'Banion 1999 (see see
5962IL10interleukin 10IL-101.3by factors that inhibit NF-_amp_#x3ba B activity such as IL-4 IL-10 and IL-13 and glucocorticoids ( O'Banion 1999 (see see Table
5973IL13interleukin 13IL-131.3by factors that inhibit NF-_amp_#x3ba B activity such as IL-4 IL-10 and IL-13 and glucocorticoids ( O'Banion 1999 (see see Table
5973IL13interleukin 13IL-131.3that inhibit NF-_amp_#x3ba B activity such as IL-4 IL-10 and IL-13 and glucocorticoids ( O'Banion 1999 (see see Table 1
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3The COX enzymes (COX-1 COX-1 and COX-2 are more completely termed prostaglandin
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3The COX enzymes (COX-1 COX-1 and COX-2 are more completely termed prostaglandin G/H G H
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8The COX enzymes (COX-1 COX-1 and COX-2 are more completely termed prostaglandin G/H G H
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8The COX enzymes (COX-1 COX-1 and COX-2 are more completely termed prostaglandin G/H G H synthases (1
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Next the peroxidase action of the COX enzyme rapidly converts PGG 2 to prostaglandin H (PGH PGH
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8The second peroxidase step of the COX-2 reaction produces the free radical superoxide which may cause damage
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Although it is unlikely that upregulation of COX-2 activity alone produces enough free radicals to account for the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Both COX isoforms are detectable in various cell types in the CNS
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Identification of the patterns of COX enzyme expression will permit us to form a hypothesis regarding
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3permit us to form a hypothesis regarding the roles of COX-1 and -2 under normal conditions and during disease
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8permit us to form a hypothesis regarding the roles of COX-1 and -2 under normal conditions and during disease
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Analysis of the expression of COX isoforms in ALS models is expected to not only determine
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3we will better understand the pathogenic and protective implications of COX activity in ALS
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX and neurons
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3COX-1 is constitutively expressed throughout the normal brain ( Kawasaki et
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Immunoreactivity for COX-2 is present in the dendritic spines of cortical neurons and
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8display a distinct alteration in the laminar pattern of cortical COX-2 immunoreactivity ( Kaufmann et al. 1996
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 immunoreactivity also is observed in the soma and throughout the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Constitutive COX-2 is in the spinal dorsal and ventral horns as well
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Indeed the antihyperalgesic activity of COX inhibitors is associated with regulation of constitutive COX-2 in the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8activity of COX inhibitors is associated with regulation of constitutive COX-2 in the spinal cord ( Svensson and Yaksh 2002
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Although a role for COX-2 in healthy cells is not clear under pathological conditions the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8cells is not clear under pathological conditions the induction of COX-2 in neurons has been well demonstrated
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 was originally localized in neurons using in situ hybridization
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Following a single maximal electroconvulsive seizure COX-2 is rapidly induced in hippocampal and cortical neurons peaking between
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8the N -methyl--aspartic acid (NMDA) NMDA receptor completely inhibits the COX-2 induction implying that NMDA receptor activation is involved in the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8that NMDA receptor activation is involved in the upregulation of COX-2 in these neurons
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In addition administration of the glucocorticoid dexamethasone markedly decreases COX-2 induction but only in the neocortex ( Yamagata et al.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8This study suggests that COX-2 upregulation in neurons is dependent upon glutamatergic activity at the
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8basalis can induce seizures in a rat and subsequently upregulate COX-2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8(1997) 1997 showed that COX-2 induction overlaps with the development of neuronal apoptosis 8 h
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8that precede neuronal death and correlates with the induction of COX-2 mRNA
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8prostaglandin production and subsequent cell death is attenuated by a COX-2 inhibitor but not with a COX-1 selective inhibitor ( Hewett
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3is attenuated by a COX-2 inhibitor but not with a COX-1 selective inhibitor ( Hewett et al. 2000
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In addition genetic studies show that transgenic mice overexpressing COX-2 specifically in neurons are more susceptible to excitotoxicity ( Kelley
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In contrast COX-2 knockout mice experience reduced neuronal death compared to wild-type mice
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 is induced in models of cerebral ischemia
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8but especially the penumbra region show a significant increase in COX-2 mRNA in the ischemic area ipsilateral to the occlusion 4
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8There is a direct correlation between the extent of COX-2 mRNA induction at 4 h and the severity of subsequent
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8the glutamate antagonist agent MK-801 significantly prevents the induction of COX-2 in the penumbra region ( Collaco-Moraes et al. 1996
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8studies provide evidence of a linkage between glutamate activity subsequent COX-2 induction and finally apoptotic death in neurons
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Although increased extracellular glutamate regardless of its source can induce COX-2 in neurons the full consequences of this induction in neurons
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 activity correlates with apoptosis in certain models however from studies
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8conducted thus far it is not clear which products of COX-2 induction are contributing to neuronal death which are helping neurons
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX and astrocytes
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In the nervous system COX-2 induction following cell activation or injury is not restricted to
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8injury is not restricted to neurons since astrocytes also upregulate COX-2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8IL-1_amp_#x3b2 causes a rapid induction of COX-2 peaking at 2 h and returning to baseline by 24
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3There is no correlate change in COX-1 mRNA
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Dexamethasone can attenuate IL-1_amp_#x3b2 -mediated PGE 2 secretion and COX-2 expression ( O'Banion et al. 1996
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Astrocytic COX-2 is also induced by LPS TNF basic fibroblast growth factor
11892TNFtumor necrosis factor (TNF superfamily, member 2)TNF1.2Astrocytic COX-2 is also induced by LPS TNF basic fibroblast growth factor (bFGF), bFGF and phorbol ester (
8053NUDT6nudix (nucleoside diphosphate linked moiety X)-type motif 6bFGF1.0also induced by LPS TNF basic fibroblast growth factor (bFGF), bFGF and phorbol ester ( O'Banion 1999
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Although there is strong evidence for the induction of COX-2 in astrocytes in vitro there are few studies that confirm
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 immunoreactive astrocytes have been observed in the hippocampus at 1_amp_#x2013
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8the cortex in Alzheimer's disease in situ hybridization with a COX-2 riboprobe revealed signal in a small proportion of GFAP-positive astrocytes
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In addition COX-2 colocalizes with GFAP in infarcted human brains ( Sairanen et
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Most in vitro studies are short-term and demonstrate COX-2 induction in the order of hours after the insult
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8vitro models may skew attempts to ascertain the significance of COX-2 activity in neurodegenerative disease
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In the context of neurodegenerative diseases the chronic induction of COX-2 will be more pathophysiologically relevant
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX and microglia
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3types in the CNS microglia appear to predominantly express the COX-1 isoform ( Yermakova et al. 1999
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3In addition COX-1 positive microglia accumulate at sites of neuronal degeneration including traumatic
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3The significance of the different isoform of COX expression in this cell type is not clear
4931HLA-Amajor histocompatibility complex, class I, AMHC0.6brain injury by making morphologic changes producing proinflammatory cytokines expressing MHC class II antigens and increasing phagocytosis ( Kreutzberg 1996 and
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8mechanisms than macrophages fibroblasts and synovial cells that can induce COX-2 via the cytokines TNF IL-1_amp_#x3b2 and IL-6
11892TNFtumor necrosis factor (TNF superfamily, member 2)TNF1.2and synovial cells that can induce COX-2 via the cytokines TNF IL-1_amp_#x3b2 and IL-6
6018IL6interleukin 6 (interferon, beta 2)IL-61.3that can induce COX-2 via the cytokines TNF IL-1_amp_#x3b2 and IL-6
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8None of these agents induce COX-2 or NF-_amp_#x3ba B expression in na_amp_#xef ve microglial cells
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In cultured rat brain microglia LPS induces COX-2 expression that is prevented in the presence of inhibitors of
7794NFKB1nuclear factor of kappa light polypeptide gene enhancer in B-cells 1 (p105)NF-kappaB0.3expression that is prevented in the presence of inhibitors of NF-kappaB (dexamethasone, dexamethasone the antioxidant pyrrolidine dithiocarbamate and the protein C
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Thus NF-_amp_#x3ba B is involved in LPS-stimulated microglial COX-2 expression ( Bauer et al. 1997
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3Although increased COX-1 in microglia is observed injury paradigms there are little data
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8injury paradigms there are little data indicating the expression of COX-2 in microglia in vivo
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8(1998) 1998 showed COX-2 immunostaining of cells with a microglial-like morphology in infarcted human
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3After examining the locations and activity of the COX enzymes throughout the CNS a discussion of the potential actions
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In a carrageenin-induced pleurisy model in rats COX-2 induction peaks at 2 h with maximal PGE 2 production
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8At a later time COX-2 increases again but this time with increased levels of PGD
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8different inflammatory responses are modulated by the addition of a COX-2 inhibitor that causes inhibition of the early inflammatory response but
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8to be a dual role for the products of the COX-2 enzyme in the nervous system
6886MAPK9mitogen-activated protein kinase 9SAPK1.3apoptotic signals through blocking the activation of stress-activated protein kinase SAPK c-Jun N-terminal kinase (JNK) JNK ( Kawamura et al. 1999
6204JUNjun oncogenec-Jun0.3signals through blocking the activation of stress-activated protein kinase SAPK c-Jun N-terminal kinase (JNK) JNK ( Kawamura et al. 1999
6881MAPK8mitogen-activated protein kinase 8JNK0.3activation of stress-activated protein kinase SAPK c-Jun N-terminal kinase (JNK) JNK ( Kawamura et al. 1999
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In these models inhibition of COX-2 can delay disease onset and progression
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Thus prostaglandin products of COX-2 appear to play a critical role in the development of
9594PTGER2prostaglandin E receptor 2 (subtype EP2), 53kDaEP20.62 induce apoptosis in a dose-dependent manner likely via the EP2 receptor and subsequent activation of caspase-3 ( Takadera et al.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Addition of COX-2 inhibitors prevents both PGE 2 production and kainic acid-induced neuronal
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8-induced glutamate may lead to further excitatory cell activation and COX-2 induction
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8This mechanism is highlighted in a model of COX-2 overexpression that displays acceleration of glutamate-mediated neuronal apoptosis ( Mirjany
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3of prostaglandins also are different depending upon the presence of COX inhibitors
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Independently these cells are protected from death by the COX-2 inhibitor APHS
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8on cell survival in the presence or absence of a COX-2 inhibitor may be because COX-2 activity results in the generation
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8presence or absence of a COX-2 inhibitor may be because COX-2 activity results in the generation of multiple prostaglandins with potentially
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8When COX-2 is inhibited both the pro- and anti-apoptotic products are lost
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8However when COX-2 is not inhibited multiple prostaglandins are present that can act
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.82 all can suppress NF-_amp_#x3ba B activation and thus suppress COX-2 induction as well as other inflammatory mediators including inducible nitric
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3in which the significance of the differential expression of the COX-1 and COX-2 isoforms may arise
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8in which the significance of the differential expression of the COX-1 and COX-2 isoforms may arise
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8the significance of the differential expression of the COX-1 and COX-2 isoforms may arise
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3Since COX-1 increases in activated microglia and is not regulated by NF-_amp_#x3ba
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8microglial origin can regulate the activity of NF-_amp_#x3ba B and COX-2 in adjacent neurons without the same feedback regulation affecting the
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD11.4mutations in the cytosolic protein copper_amp_#x2013 zinc superoxide dismutase (SOD1) SOD1 were reported in several FALS families
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD11.4Since then over 95 mutations in SOD1 have been identified in patients with FALS ( Mithal et
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD11.4SOD1 is a metalloenzyme that detoxifies the superoxide anion to form
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD11.4However SOD1 mutations account for only 20% of familial ALS ( Feldman
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD11.4Because mutant SOD1 explains only a very small subset of ALS pathology it
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX prostaglandins and ALS
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 activity appears to play an important role in ALS
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In many different models COX-2 upregulation occurs concurrently with ALS disease events
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 and PGE 2 are significantly elevated upwards of sevenfold in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD1-expressing1.4In the spinal cords of transgenic mutant human SOD1-expressing (mSOD1) mSOD1 mice there is increased expression of COX-2 but
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.4In the spinal cords of transgenic mutant human SOD1-expressing (mSOD1) mSOD1 mice there is increased expression of COX-2 but not COX-1
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8human SOD1-expressing (mSOD1) mSOD1 mice there is increased expression of COX-2 but not COX-1 mRNA
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3mSOD1 mice there is increased expression of COX-2 but not COX-1 mRNA
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 mRNA and protein levels COX catalytic activity and PGE 2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX-2 mRNA and protein levels COX catalytic activity and PGE 2 levels are all increased in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.4increased in the spinal cord but not the cerebellum of mSOD1 mice
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8COX-2 levels in mSOD1 mice are increased in both early symptomatic
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.4COX-2 levels in mSOD1 mice are increased in both early symptomatic and end-stage disease
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Selective inhibition of COX-2 with SC236 protects motor neurons in an organotypic cell culture
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3In addition several drugs that inhibit COX isoforms directly prevent the death of motor neurons in enriched
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3This suggests that the motor neurons activate COX during an injury and the mechanisms of protection by COX
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3COX during an injury and the mechanisms of protection by COX inhibitors in mixed culture or in vivo is not mediated
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.4In the transgenic mSOD1 mouse the nonselective COX inhibitor acetylsalicylate delays the appearance of
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3In the transgenic mSOD1 mouse the nonselective COX inhibitor acetylsalicylate delays the appearance of motor deficits ( Barneoud
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8This delayed onset is recapitulated when the selective COX-2 inhibitor nimesulide is administered prophylactically in these mice ( Pompl
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Treatment with Celecoxib a different selective COX-2 inhibitor also prolongs survival in the mSOD1 mouse model of
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))mSOD11.4a different selective COX-2 inhibitor also prolongs survival in the mSOD1 mouse model of ALS ( Drachman et al. 2002
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8It seems that neuroinflammation proceeds albeit more slowly in COX-2 inhibitor-treated animals possibly through the slower microglial COX-1 upregulation and
9604PTGS1prostaglandin-endoperoxide synthase 1 (prostaglandin G/H synthase and cyclooxygenase)COX-11.3slowly in COX-2 inhibitor-treated animals possibly through the slower microglial COX-1 upregulation and likely through multiple additional regulatory mechanisms
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Experiments that demonstrate protective abilities of COX-2 inhibition imply that COX-2 activation contributes to neuronal vulnerability and
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Experiments that demonstrate protective abilities of COX-2 inhibition imply that COX-2 activation contributes to neuronal vulnerability and apoptosis by an undefined
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-dependent0.0It may be that the COX-dependent production of reactive oxygen species during the peroxidase step of
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3not known whether the amount of ROS produced by the COX enzyme is sufficient to cause neuronal death
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8In addition some of the prostaglandin products of the COX-2 enzyme cause direct damage to neurons as well as act
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8It is clear that neuroinflammation particularly COX-2 upregulation and prostaglandin production plays a significant role in neurodegenerative
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8It seems likely that COX-2 inhibitors can delay the progression of symptoms and clinical studies
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Although treatment of neurodegenerative diseases such as ALS with COX-2 inhibitors is likely to produce some symptomatic benefit it is
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8activate NF-_amp_#x3ba B leading to a paradoxical activation of the COX-2 enzyme that is clearly a problem for this therapeutic approach
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8prostaglandins that feedback on NF-_amp_#x3ba B to regulate transcription of COX-2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Certain downstream products of the COX-2 enzyme are pro-apoptotic while others are neuroprotective
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8Inhibiting COX-2 will block both the neurodegenerative and neuroprotective products of this
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8in the development of future therapies rather than broadly targeting COX-2 or even further upstream at the level of NF-_amp_#x3ba B
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX-23.8of NF-_amp_#x3ba B to target specific prostaglandin synthases downstream of COX-2
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3Thorough understanding of the individual roles of prostaglandins COX isoforms and neuroprotective mechanisms of COX inhibitors are essential to
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)COX0.3individual roles of prostaglandins COX isoforms and neuroprotective mechanisms of COX inhibitors are essential to further these therapeutic developments
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0there are two distinct cox isoenzymes known as cox 1 and cox 2 that are 65% homologous.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0conversely cox 2 was initially characterized as an inducible enzyme that is expressed in response to inflammatory stimuli cytokines and mitogens o'banion 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 is now known to be constitutively expressed in the kidney stomach and central nervous system hoffmann 2000 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0many cellular factors induce cox 2 expression including multiple growth factors cytokines interleukin il 1_amp_#x3b2; tumor necrosis factor tnf lipopolysaccharide lps phorbol ester and elevated intracellular calcium concentration.
11892TNFtumor necrosis factor (TNF superfamily, member 2)tumor necrosis factor1.0many cellular factors induce cox 2 expression including multiple growth factors cytokines interleukin il 1_amp_#x3b2; tumor necrosis factor tnf lipopolysaccharide lps phorbol ester and elevated intracellular calcium concentration.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0one transcription factor that influences cox 2 expression following exposure to these cellular factors is nf _amp_#x3ba;b.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 has an nf _amp_#x3ba;b binding site in its promoter region that is shared with other inflammatory mediators including icam 1 il 2 il 8 and complement baldwin 1996 and schmedtje et al. 1997 .
6001IL2interleukin 2il 21.0cox 2 has an nf _amp_#x3ba;b binding site in its promoter region that is shared with other inflammatory mediators including icam 1 il 2 il 8 and complement baldwin 1996 and schmedtje et al. 1997 .
6025IL8interleukin 8il 81.0cox 2 has an nf _amp_#x3ba;b binding site in its promoter region that is shared with other inflammatory mediators including icam 1 il 2 il 8 and complement baldwin 1996 and schmedtje et al. 1997 .
5962IL10interleukin 10il 101.0specific inhibition of cox 2 upregulation can be achieved by factors that inhibit nf _amp_#x3ba;b activity such as il 4 il 10 and il 13 and glucocorticoids o'banion 1999 see table 1 .
5973IL13interleukin 13il 131.0specific inhibition of cox 2 upregulation can be achieved by factors that inhibit nf _amp_#x3ba;b activity such as il 4 il 10 and il 13 and glucocorticoids o'banion 1999 see table 1 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0specific inhibition of cox 2 upregulation can be achieved by factors that inhibit nf _amp_#x3ba;b activity such as il 4 il 10 and il 13 and glucocorticoids o'banion 1999 see table 1 .
6014IL4interleukin 4il 41.0specific inhibition of cox 2 upregulation can be achieved by factors that inhibit nf _amp_#x3ba;b activity such as il 4 il 10 and il 13 and glucocorticoids o'banion 1999 see table 1 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0the cox enzymes cox 1 and cox 2 are more completely termed prostaglandin g/h synthases 1 and 2 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0the second peroxidase step of the cox 2 reaction produces the free radical superoxide which may cause damage to cells in als and other neurodegenerative diseases kaufmann et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although it is unlikely that upregulation of cox 2 activity alone produces enough free radicals to account for the degree of oxidative damage associated with neurodegenerative diseases it may be one of several sources that together cause significant
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0immunoreactivity for cox 2 is present in the dendritic spines of cortical neurons and thus may be involved in synaptic signaling kaufmann et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0these rats display a distinct alteration in the laminar pattern of cortical cox 2 immunoreactivity kaufmann et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 immunoreactivity also is observed in the soma and throughout the dendritic extent of many neurons kaufmann et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0constitutive cox 2 is in the spinal dorsal and ventral horns as well as in dorsal root ganglia yaksh et al. 2001 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0indeed the antihyperalgesic activity of cox inhibitors is associated with regulation of constitutive cox 2 in the spinal cord svensson and yaksh 2002 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although a role for cox 2 in healthy cells is not clear under pathological conditions the induction of cox 2 in neurons has been well demonstrated.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 was originally localized in neurons using in situ hybridization.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0following a single maximal electroconvulsive seizure cox 2 is rapidly induced in hippocampal and cortical neurons peaking between 1 and 2 h and falling to baseline by 24 h.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0administration of mk 801 an antagonist of the n methyl aspartic acid nmda receptor completely inhibits the cox 2 induction implying that nmda receptor activation is involved in the upregulation of cox 2 in these neurons.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in addition administration of the glucocorticoid dexamethasone markedly decreases cox 2 induction but only in the neocortex yamagata et al. 1993 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0this study suggests that cox 2 upregulation in neurons is dependent upon glutamatergic activity at the synapse.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0intraperitoneal administration of kainic acid and also its local injection into the nuclear basalis can induce seizures in a rat and subsequently upregulate cox 2.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0 1997 showed that cox 2 induction overlaps with the development of neuronal apoptosis 8 h following seizure induction.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0furthermore exposure of mixed cortical cells in vitro to nmda elicits a time dependent accumulation of prostaglandins that precede neuronal death and correlates with the induction of cox 2 mrna.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0this nmda stimulated prostaglandin production and subsequent cell death is attenuated by a cox 2 inhibitor but not with a cox 1 selective inhibitor hewett et al. 2000 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in addition genetic studies show that transgenic mice overexpressing cox 2 specifically in neurons are more susceptible to excitotoxicity kelley et al. 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in contrast cox 2 knockout mice experience reduced neuronal death compared to wild type mice when exposed to nmda or ischemia iadecola et al. 2001 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 is induced in models of cerebral ischemia.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0both regions but especially the penumbra region show a significant increase in cox 2 mrna in the ischemic area ipsilateral to the occlusion 4 and 24 h following the occlusion.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0there is a direct correlation between the extent of cox 2 mrna induction at 4 h and the severity of subsequent tissue damage.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0also the glutamate antagonist agent mk 801 significantly prevents the induction of cox 2 in the penumbra region collaco moraes et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0these studies provide evidence of a linkage between glutamate activity subsequent cox 2 induction and finally apoptotic death in neurons.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although increased extracellular glutamate regardless of its source can induce cox 2 in neurons the full consequences of this induction in neurons are still unclear.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 activity correlates with apoptosis in certain models; however from studies conducted thus far it is not clear which products of cox 2 induction are contributing to neuronal death which are helping neurons to escape death or which are unrelated to cell death.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in the nervous system cox 2 induction following cell activation or injury is not restricted to neurons since astrocytes also upregulate cox 2.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0il 1_amp_#x3b2; causes a rapid induction of cox 2 peaking at 2 h and returning to baseline by 24 h.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0dexamethasone can attenuate il 1_amp_#x3b2; mediated pge 2 secretion and cox 2 expression o'banion et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0astrocytic cox 2 is also induced by lps tnf basic fibroblast growth factor bfgf and phorbol ester o'banion 1999 .
3676FGF2fibroblast growth factor 2 (basic)basic fibroblast growth factor bfgf1.0astrocytic cox 2 is also induced by lps tnf basic fibroblast growth factor bfgf and phorbol ester o'banion 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although there is strong evidence for the induction of cox 2 in astrocytes in vitro there are few studies that confirm this finding in vivo.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 immunoreactive astrocytes have been observed in the hippocampus at 1_amp_#x2013;11 weeks but not 3 days following kainic acid seizure induction in rats sandhya et al. 1998 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in the cortex in alzheimer's disease in situ hybridization with a cox 2 riboprobe revealed signal in a small proportion of gfap positive astrocytes chang et al. 1996 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in addition cox 2 colocalizes with gfap in infarcted human brains sairanen et al. 1998 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0most in vitro studies are short term and demonstrate cox 2 induction in the order of hours after the insult.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0thus the in vitro models may skew attempts to ascertain the significance of cox 2 activity in neurodegenerative disease.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in the context of neurodegenerative diseases the chronic induction of cox 2 will be more pathophysiologically relevant.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0microglia have different regulatory mechanisms than macrophages fibroblasts and synovial cells that can induce cox 2 via the cytokines tnf il 1_amp_#x3b2; and il 6.
6018IL6interleukin 6 (interferon, beta 2)il 61.0microglia have different regulatory mechanisms than macrophages fibroblasts and synovial cells that can induce cox 2 via the cytokines tnf il 1_amp_#x3b2; and il 6.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0none of these agents induce cox 2 or nf _amp_#x3ba;b expression in na_amp_#xef;ve microglial cells.
8723SERPINA5serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 5protein c inhibitor1.0in cultured rat brain microglia lps induces cox 2 expression that is prevented in the presence of inhibitors of nf kappab dexamethasone the antioxidant pyrrolidine dithiocarbamate and the protein c inhibitor go6976 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in cultured rat brain microglia lps induces cox 2 expression that is prevented in the presence of inhibitors of nf kappab dexamethasone the antioxidant pyrrolidine dithiocarbamate and the protein c inhibitor go6976 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0thus nf _amp_#x3ba;b is involved in lps stimulated microglial cox 2 expression bauer et al. 1997 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although increased cox 1 in microglia is observed injury paradigms there are little data indicating the expression of cox 2 in microglia in vivo.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0 1998 showed cox 2 immunostaining of cells with a microglial like morphology in infarcted human brain but did not show colocalization with microglial markers.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in a carrageenin induced pleurisy model in rats cox 2 induction peaks at 2 h with maximal pge 2 production and an increasing inflammatory response.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0at a later time cox 2 increases again but this time with increased levels of pgd 2 and pgj 2 and decreased inflammation.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0these temporally different inflammatory responses are modulated by the addition of a cox 2 inhibitor that causes inhibition of the early inflammatory response but increased inflammation later gilroy et al. 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0there also appears to be a dual role for the products of the cox 2 enzyme in the nervous system.
7808NGFnerve growth factor (beta polypeptide)nerve growth factor1.0in addition pge 1 also derived from pge 2 reduces the incidence of apoptotic death in nerve growth factor deprived pheochromocytoma pc12 cells by preventing the activation of apoptotic signals through blocking the activation of stress activated protein kinase sapk /c jun n terminal kinase jnk kawamura et
6204JUNjun oncogenec jun1.0 apoptotic death in nerve growth factor deprived pheochromocytoma pc12 cells by preventing the activation of apoptotic signals through blocking the activation of stress activated protein kinase sapk /c jun n terminal kinase jnk kawamura et al. 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in these models inhibition of cox 2 can delay disease onset and progression.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0thus prostaglandin products of cox 2 appear to play a critical role in the development of motor neuron degeneration almer et al. 2002 .
1504CASP3caspase 3, apoptosis-related cysteine peptidasecaspase 31.0in rat cortical cells high concentrations of pge 2 induce apoptosis in a dose dependent manner likely via the ep2 receptor and subsequent activation of caspase 3 takadera et al. 2002 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0addition of cox 2 inhibitors prevents both pge 2 production and kainic acid induced neuronal death in these cells kim et al. 2002 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0the pge 2 stimulated glutamate release produces a feed forward cycle whereby pge 2 induced glutamate may lead to further excitatory cell activation and cox 2 induction.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0this mechanism is highlighted in a model of cox 2 overexpression that displays acceleration of glutamate mediated neuronal apoptosis mirjany et al. 2002 .
9236PPARGperoxisome proliferator-activated receptor gammaperoxisome proliferator activated receptor gamma1.0another prostaglandin 15 deoxy_amp_#x394; 12 14 pgj 2 a natural peroxisome proliferator activated receptor gamma ligand formed from pgd 2 induces apoptosis in both human astrocytes chattopadhyay et al. 2000 and cortical neurons rohn et al. 2001 .
1504CASP3caspase 3, apoptosis-related cysteine peptidasecaspase 31.0exposure to pgd 2 synthase induces apoptosis in pc12 neuronal cells via caspase 3 activation.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0independently these cells are protected from death by the cox 2 inhibitor aphs.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0one possible reason why there are differential effects on cell survival in the presence or absence of a cox 2 inhibitor may be because cox 2 activity results in the generation of multiple prostaglandins with potentially different effects.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0when cox 2 is inhibited both the pro and anti apoptotic products are lost so cellular responses are directly produced by any single prostaglandin added to culture media.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0however when cox 2 is not inhibited multiple prostaglandins are present that can act in a synergistic or antagonistic manner.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0prostaglandins pga 1 pga 2 and pgj 2 all can suppress nf _amp_#x3ba;b activation and thus suppress cox 2 induction as well as other inflammatory mediators including inducible nitric oxide synthase and certain cytokines.
7873NOS2Anitric oxide synthase 2A (inducible, hepatocytes)nitric oxide synthase1.0prostaglandins pga 1 pga 2 and pgj 2 all can suppress nf _amp_#x3ba;b activation and thus suppress cox 2 induction as well as other inflammatory mediators including inducible nitric oxide synthase and certain cytokines.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0interestingly this is one area in which the significance of the differential expression of the cox 1 and cox 2 isoforms may arise.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0since cox 1 increases in activated microglia and is not regulated by nf _amp_#x3ba;b then prostaglandins of microglial origin can regulate the activity of nf _amp_#x3ba;b and cox 2 in adjacent neurons without the same feedback regulation affecting the microglia.
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase1.0in 1993 mutations in the cytosolic protein copper_amp_#x2013;zinc superoxide dismutase sod1 were reported in several fals families.
1516CATcatalasecatalase1.0sod1 is a metalloenzyme that detoxifies the superoxide anion to form hydrogen peroxide which is then converted to water through the activity of another enzyme such as catalase mithal et al. 1999 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 activity appears to play an important role in als.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in many different models cox 2 upregulation occurs concurrently with als disease events.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 and pge 2 are significantly elevated upwards of sevenfold in postmortem spinal cords of patients with sporadic als almer et al. 2001 and yasojima et al. 2001 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in the spinal cords of transgenic mutant human sod1 expressing msod1 mice there is increased expression of cox 2 but not cox 1 mrna.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 mrna and protein levels cox catalytic activity and pge 2 levels are all increased in the spinal cord but not the cerebellum of msod1 mice.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0cox 2 levels in msod1 mice are increased in both early symptomatic and end stage disease in neurons and to a lesser extent in astrocytes in the anterior horn of the spinal cord.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0selective inhibition of cox 2 with sc236 protects motor neurons in an organotypic cell culture model of als drachman and rothstein 2000 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0this delayed onset is recapitulated when the selective cox 2 inhibitor nimesulide is administered prophylactically in these mice pompl et al. 2003 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0treatment with celecoxib a different selective cox 2 inhibitor also prolongs survival in the msod1 mouse model of als drachman et al. 2002 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0it seems that neuroinflammation proceeds albeit more slowly in cox 2 inhibitor treated animals possibly through the slower microglial cox 1 upregulation and likely through multiple additional regulatory mechanisms.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0experiments that demonstrate protective abilities of cox 2 inhibition imply that cox 2 activation contributes to neuronal vulnerability and apoptosis by an undefined mechanism or mechanisms.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in addition some of the prostaglandin products of the cox 2 enzyme cause direct damage to neurons as well as act in both an autocrine and paracrine manner to propagate inflammation.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0it is clear that neuroinflammation particularly cox 2 upregulation and prostaglandin production plays a significant role in neurodegenerative disorders such as als.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0it seems likely that cox 2 inhibitors can delay the progression of symptoms and clinical studies addressing this issue are both warranted and currently underway.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0although treatment of neurodegenerative diseases such as als with cox 2 inhibitors is likely to produce some symptomatic benefit it is very unlikely that these drugs will revolutionize the treatment of neurodegenerative disease.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0in fact it is reported that high doses of certain nsaids can activate nf _amp_#x3ba;b leading to a paradoxical activation of the cox 2 enzyme that is clearly a problem for this therapeutic approach niederberger et al. 2001 .
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0this finding is not surprising given that it is the level of prostaglandins that feedback on nf _amp_#x3ba;b to regulate transcription of cox 2.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0certain downstream products of the cox 2 enzyme are pro apoptotic while others are neuroprotective.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0inhibiting cox 2 will block both the neurodegenerative and neuroprotective products of this enzyme.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0it may be more appropriate in the development of future therapies rather than broadly targeting cox 2 or even further upstream at the level of nf _amp_#x3ba;b to target specific prostaglandin synthases downstream of cox 2.
9605PTGS2prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase)cox 21.0 or even further upstream at the level of nf _amp_#x3ba;b to target specific prostaglandin synthases downstream of cox 2.