Document Information


PMID 10077670  (  )
Title The role of immunophilins in mutant superoxide dismutase-1linked familial amyotrophic lateral sclerosis.
Abstract It has been reported that expression of familial amyotrophic lateral sclerosis (FALS)-associated mutant Cu/Zn superoxide dismutase-1 (SOD) induces apoptosis of neuronal cells in culture associated with an increase in reactive oxygen species. SOD recently has been shown to prevent calcineurin inactivation, initiating the present investigations examining the role of calcineurin in mutant SOD-induced cell death. Wild-type or mutant SOD was expressed in neuronal cells by infection with replication-deficient adenoviruses. PC12 cells overexpressing human wild-type SOD exhibited higher calcineurin activity than cells expressing FALS-related mutant SOD (SODV148G); however, cells expressing SODV148G had calcineurin activity equal to mock-infected cells, suggesting that cell death induced by mutant SOD was not related to a decrease in calcineurin activity. Calcineurin antagonists such as cyclosporin A and FK506, as well as nonimmunosuppressant analogs of cyclosporin A, significantly enhanced SODV148G- and SODA4V-induced cell death. Because both groups of drugs inhibit the rotamase activity of cyclophilins (CyP), but only the immunosuppressant analogs inhibit calcineurin activity, these data suggest that rotamase inhibition underlies the enhanced cell death after SODV148G expression. The importance of rotamase activity in mutant SOD-mediated apoptosis was supported by experiments showing that overexpressed wild-type cyclophilin A (CyPA), but not CyPA with a rotamase active site point mutation, protected cells from death after SODV148G expression. These data suggest that mutant SOD produces a greater need for rotamase and, also, highlights possible new therapeutic strategies in FALS. Street, University of Chicago, Chicago, IL 60637, USA. America

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Targets by SciMiner Summary

HUGO ID Symbol Target Name #Occur ActualStr
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))96superoxide dismutase 1 | SOD-expression | SOD-mediated | SOD-induced |
3711FKBP1AFK506 binding protein 1A, 12kDa43rotamase |
9253PPIApeptidylprolyl isomerase A (cyclophilin A)24CyPA |
7808NGFnerve growth factor (beta polypeptide)19nerve growth factor | NGF-withdrawal | NGF-removal | NGF-differentiated |
1706CD8ACD8a molecule4CD8 |
9380PRKACAprotein kinase, cAMP-dependent, catalytic, alpha1protein kinase a catalytic subunit |
437ALPIalkaline phosphatase, intestinal1alkaline phosphatase |
9388PRKAR1Aprotein kinase, cAMP-dependent, regulatory, type I, alpha (tissue specific extinguisher 1)1camp dependent protein kinase |
8988PIN1peptidylprolyl cis/trans isomerase, NIMA-interacting 11prolyl isomerase |

 


Targets by SciMiner Full list

HUGO ID Symbol Name ActualStr Score FlankingText
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2(FALS)-associated FALS -associated mutant Cu/Zn Cu Zn superoxide dismutase-1 (SOD) SOD induces apoptosis of neuronal cells in culture associated with an
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD recently has been shown to prevent calcineurin inactivation initiating the
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4the present investigations examining the role of calcineurin in mutant SOD-induced cell death
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Wild-type or mutant SOD was expressed in neuronal cells by infection with replication-deficient adenoviruses
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2PC12 cells overexpressing human wild-type SOD exhibited higher calcineurin activity than cells expressing FALS-related mutant SOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD exhibited higher calcineurin activity than cells expressing FALS-related mutant SOD (SODV148G); SODV148G however cells expressing SODV148G had calcineurin activity equal
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2to mock-infected cells suggesting that cell death induced by mutant SOD was not related to a decrease in calcineurin activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-mediated2.4The importance of rotamase activity in mutant SOD-mediated apoptosis was supported by experiments showing that overexpressed wild-type cyclophilin
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3supported by experiments showing that overexpressed wild-type cyclophilin A (CyPA), CyPA but not CyPA with a rotamase active site point mutation
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3showing that overexpressed wild-type cyclophilin A (CyPA), CyPA but not CyPA with a rotamase active site point mutation protected cells from
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2These data suggest that mutant SOD produces a greater need for rotamase and also highlights possible
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2preparation of adenoviruses (AdVs) AdVs expressing wild type or mutant SOD have been described previously ( 12
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Expression of SOD and calcineurin A was analyzed by Western blot analysis as
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2A previously described method was followed for immunohistochemical detection of SOD ( 12
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3CyPA (histidine-tagged) histidine-tagged ( 17 expression was detected by immunostaining with
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2The effect of wild-type (WT) WT or FALS-linked mutant SOD gene expression on viability of cells was determined as reported
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3For some experiments involving CyPA we used a wild-type CyPA (CyPAWT) CyPAWT cDNA or isomerase-deficient
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3For some experiments involving CyPA we used a wild-type CyPA (CyPAWT) CyPAWT cDNA or isomerase-deficient mutant CyPA(R55A) CyPA R55A cDNA
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3a wild-type CyPA (CyPAWT) CyPAWT cDNA or isomerase-deficient mutant CyPA(R55A) CyPA R55A cDNA isolated from rat brain and cloned into pcDNA1/AMP
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3PC12 cells were transfected with either CyPAWT cDNA or CyPA(R55A) CyPA R55A cDNA by using polyethylenimine as described ( 18 19
1706CD8ACD8a moleculeCD80.0a control for these experiments some cells were transfected with CD8 cDNA (a a gift from Jeff Bluestone University of Chicago
7808NGFnerve growth factor (beta polypeptide)NGF1.2phosphatase activity in cells expressing SODV148G or SODWT or after NGF withdrawal was normalized to activity of mock-infected cells
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD Activity Assay
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD activity was determined in triplicate by using a colorimetric assay
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Overexpression of WT- and FALS-Associated Mutant SOD with Replication-Deficient Adenoviruses
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD expression in PC12 cells was determined by Western blot analysis
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Endogenous rodent SOD was present in both the mock-infected (Fig Fig 1 A
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2of slower electrophoretic mobility consistent with that expected for human SOD was present in extracts from cells infected with AdSODWT AdSODV148G
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2The human SOD level in cells expressing SODWT SODV148G and SODA4V was similar
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2cells expressing SODWT SODV148G and SODA4V was similar to endogenous SOD seen in mock cells (Fig Fig 1 A
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Effect of Overexpression of Mutant SOD on Neural Cell Viability
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We determined the effect of expression of WT and mutant SOD on differentiated PC12 cells a model system for postmitotic neurons
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2that the cells that died were the ones expressing mutant SOD and that these cells died by apoptosis ( 12
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Effect of Overexpression of Mutant SOD on Calcineurin Activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We examined the effects of WT and mutant SOD overexpression on calcineurin activity in differentiated PC12 cells
7808NGFnerve growth factor (beta polypeptide)NGF-removal1.2was no decline in calcineurin activity of PC12 cells after NGF-removal a procedure that also leads to apoptotic cell death (Fig
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We next tested whether the effects of SOD overexpression on calcineurin activity were related to a change in
7808NGFnerve growth factor (beta polypeptide)NGF1.2after mock infection (Fig Fig 2 C lane 1 after NGF removal (Fig Fig 2 C lane 2 or 72 hr
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2CsA and CsA Analogs on Cell Death Induced by Mutant SOD Expression or NGF Withdrawal
7808NGFnerve growth factor (beta polypeptide)NGF1.2Analogs on Cell Death Induced by Mutant SOD Expression or NGF Withdrawal
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2To assess the relationship between SOD expression calcineurin activity and cell death cells were treated with
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4As previously noted these results indicate that mutant SOD-induced cell death is not related to calcineurin inhibition
7808NGFnerve growth factor (beta polypeptide)NGF1.2811 and PSC 833 protected PC12 cells from death after NGF withdrawal (Fig Fig 3 B
7808NGFnerve growth factor (beta polypeptide)NGF1.2dansylated CsA had relatively little effect on cell death after NGF withdrawal (Fig Fig 3 B
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4Both CsA and PKF 211_amp_#x02013 811 significantly enhanced the mutant SOD-induced death of hippocampal neurons (Fig Fig 4 A
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2studies suggested that CsA and its immunosuppressive analogs might enhance SOD mutant-induced cell death through its interference with rotamase activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Table 1 shows that the baseline SOD activity was similar in mock SODWT- and SODV148G-expressing cells CsA
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2mock SODWT- and SODV148G-expressing cells CsA caused a decrease in SOD activity that was significantly (albeit albeit slightly more in SODWT-expressing
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2the mutant SOD-expressing cells had a slightly greater decrease in SOD activity than SODWT-expressing cells
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Our interpretation of these studies is that human SOD/rodent SOD rodent SOD heterodimers that are formed in the transiently expressing
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2interpretation of these studies is that human SOD/rodent SOD rodent SOD heterodimers that are formed in the transiently expressing cells may
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2In addition the mutant human SOD/rodent SOD rodent SOD heterodimers may be more sensitive to changes in
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2In addition the mutant human SOD/rodent SOD rodent SOD heterodimers may be more sensitive to changes in conformation than
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2sensitive to changes in conformation than the WT human SOD/rodent SOD rodent SOD heterodimers
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2changes in conformation than the WT human SOD/rodent SOD rodent SOD heterodimers
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Effect of Overexpression of Cyclophilin A in SOD Mutant-Induced Cell Death
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4further examine the role of cyclophilin rotamase activity on mutant SOD-induced cell death we transfected NGF-differentiated PC12 cells with wild-type CyPA
7808NGFnerve growth factor (beta polypeptide)NGF-differentiated1.2cyclophilin rotamase activity on mutant SOD-induced cell death we transfected NGF-differentiated PC12 cells with wild-type CyPA (CyPAWT) CyPAWT cDNA or CyPA(R55A)
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3SOD-induced cell death we transfected NGF-differentiated PC12 cells with wild-type CyPA (CyPAWT) CyPAWT cDNA or CyPA(R55A) CyPA R55A cDNA that contains
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3PC12 cells with wild-type CyPA (CyPAWT) CyPAWT cDNA or CyPA(R55A) CyPA R55A cDNA that contains a point mutation in the putative
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3CyPA immunohistochemical staining showed transfection efficiencies of 68 _amp_#x000b1 2_amp_#x00025 (
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3cells that overexpressed CyPAWT but not PC12 cells overexpressing CyPA(R55A), CyPA R55A exhibited reduced cell death after SODV148G expression (Fig Fig
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-expression2.4CyPAWT produced _amp_#x0003e 50_amp_#x00025 protection from cell death after mutant SOD-expression compared with that seen with transfection of a control cDNA
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3transfection of a control cDNA (CD8); CD8 transfection of CyPA(R55A) CyPA R55A was not protective
1706CD8ACD8a moleculeCD80.0with that seen with transfection of a control cDNA (CD8); CD8 transfection of CyPA(R55A) CyPA R55A was not protective
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3These results suggest that the rotamase function of CyPA protects cells from death induced by SODV148G
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3In contrast overexpression of CyPAWT or CyPA(R55A) CyPA R55A in cells infected with AdSODWT or in mock-infected cells
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3Furthermore overexpression of either CyPAWT or CyPA(R55A) CyPA R55A did not significantly protect cells from death induced by
7808NGFnerve growth factor (beta polypeptide)NGF1.2R55A did not significantly protect cells from death induced by NGF withdrawal (Fig Fig 5 B indicating that the apoptotic pathway
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.25 B indicating that the apoptotic pathway induced by mutant SOD differs from that after growth factor removal
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3To further investigate these issues we tested whether CyPA rescue of mutant SOD-induced cell death would be decreased with
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4investigate these issues we tested whether CyPA rescue of mutant SOD-induced cell death would be decreased with CsA treatment
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3Table 2 shows that overexpression of CyPA (but but not CD8 _amp_#x0201c control_amp_#x0201d overexpression significantly reduced SODV148G-induced
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3cell death (from from 49.1 to 21.9_amp_#x00025 and that the CyPA rescue was decreased by CsA (changing changing cell death from
1706CD8ACD8a moleculeCD80.0Table 2 shows that overexpression of CyPA (but but not CD8 _amp_#x0201c control_amp_#x0201d overexpression significantly reduced SODV148G-induced cell death (from from
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2FALS-associated mutant SOD is believed to kill neurons through a gain of adverse
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We recently demonstrated that overexpression of mutant SOD leads to altered superoxide content and induces the death of
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2( 16 that WT SOD prevents calcineurin from inactivation
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2This finding suggested to us that mutant SOD might induce cell death because it fails to protect calcineurin
7808NGFnerve growth factor (beta polypeptide)NGF-differentiated1.2adenovirus as a vector to express SODWT or SODV148G in NGF-differentiated PC12 cells and hippocampal neurons to test whether calcineurin was
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4in this death and to elucidate the mechanism underlying mutant SOD-induced cell death
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4For the latter reason mutant SOD-induced cell death appeared unrelated to an effect on calcineurin activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4To further investigate a role for calcineurin inactivation in mutant SOD-induced cell death we tested the effect of CsA a calcineurin
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4demonstrate a lack of correlation between calcineurin activity and mutant SOD-induced cell death
7808NGFnerve growth factor (beta polypeptide)NGF-withdrawal1.2Both NGF-withdrawal and expression of SOD mutations have been associated with the
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Both NGF-withdrawal and expression of SOD mutations have been associated with the generation of O 2
7808NGFnerve growth factor (beta polypeptide)NGF1.2For NGF withdrawal and NMDA toxicity the ability of CsA and its
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2hand CsA and its analogs enhanced death induced by mutant SOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2found that both drug classes enhanced apoptosis induced by mutant SOD indicating that the action of CsA may be related to
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2A role for rotamase in mutant SOD toxicity was supported by experiments comparing mutant SOD-induced cell death
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4in mutant SOD toxicity was supported by experiments comparing mutant SOD-induced cell death after expression of CyPAWT vs an isomerase activity-deficient
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3after expression of CyPAWT vs an isomerase activity-deficient mutant CyPA(R55A) CyPA R55A
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3The WT but not the mutant CyPA protected cells from death induced by mutant SOD expression
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2the mutant CyPA protected cells from death induced by mutant SOD expression
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3Although a recent report concluded that CyPA(R55A) CyPA R55A may have more rotamase activity than previously suspected (
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2importance of rotamase activity in modifying the effect of mutant SOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4The findings that rotamase activity protects cells from mutant SOD-induced cell death and that there is roughly similar rotamase activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2WT- and mutant SOD-expressing cells suggests that cells expressing mutant SOD have a greater reliance on rotamase activity and has implications
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Mutant SOD may increase the oxidative modification of proteins ( 30 and
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2especially sensitive to the free radical damage induced by mutant SOD because of their high oxidative activity at least partly resulting
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3In fact CyPA has been shown to be transported by slow axonal transport
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2also may have a role in the normal folding of SOD itself to help stabilize the enzyme or its dimers
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2This activity may be especially critical for abnormal FALS-associated mutant SOD function because SOD mutations may destabilize SOD or the dimer
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2be especially critical for abnormal FALS-associated mutant SOD function because SOD mutations may destabilize SOD or the dimer ( 3 37
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2abnormal FALS-associated mutant SOD function because SOD mutations may destabilize SOD or the dimer ( 3 37 and may lead to
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We found that SOD activity decreased slightly more after mutant SOD expression than after
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2We found that SOD activity decreased slightly more after mutant SOD expression than after SODWT expression suggesting that the mutant enzyme
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2WT to the effects of CsA perhaps because the mutant SOD was more sensitive to a decline in rotamase activity and
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2may be that other proteins perhaps ones that interact with SOD are more sensitive to decreased rotamase activity
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2death seen after CsA treatment of PC12 cells expressing mutant SOD is related to its proapoptotic effect on these cells because
7808NGFnerve growth factor (beta polypeptide)NGF1.2addition CsA actually decreased cell death in PC12 cells after NGF withdrawal
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Figure 1 ( A Western blot analysis of SOD from PC12 cells 3 days after mock infection (lane lane
7808NGFnerve growth factor (beta polypeptide)NGF1.2assayed 3 days after AdV infection or 1 day after NGF withdrawal
7808NGFnerve growth factor (beta polypeptide)NGF1.2PC12 cells ( A and show a protective effect after NGF removal ( B
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.35 Effect of overexpression of WTCyPA or an isomerase-deficient CyPA(R55A) CyPA R55A on PC12 cell death induced by SODV148G expression (
7808NGFnerve growth factor (beta polypeptide)NGF1.2cell death induced by SODV148G expression ( A or after NGF withdrawal ( B
1706CD8ACD8a moleculeCD80.0As a control cells were transfected with CD8 cDNA
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Table 1 Mean rotamase and SOD activity _amp_#x0005b percent of control (mock-infected) mock-infected PC12 Cells_amp_#x0005d
9253PPIApeptidylprolyl isomerase A (cyclophilin A)CyPA1.3Table 2 CyPA overexpression rescues PC12 cells from SODV148G-induced death as well as
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2ALS amyotrophic lateral sclerosis SOD Cu/Zn Cu Zn superoxide dismutase-1 FALS familial ALS CyP cyclophilin
7808NGFnerve growth factor (beta polypeptide)NGF1.2Zn superoxide dismutase-1 FALS familial ALS CyP cyclophilin WT wild-type NGF nerve growth factor AdV adenovirus CsA cyclosporin A NMDA N
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2In 1993 mutations in Cu/Zn Cu Zn superoxide dismutase-1 (SOD) SOD were found to be associated with 20_amp_#x00025 of cases of
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4investigations into the molecular mechanisms underlying the pathogenesis of mutant SOD-induced FALS
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2SOD is a ubiquitously expressed homodimeric cytosolic enzyme that dismutates superoxide
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2Mutant SOD has been hypothesized to cause FALS not through a loss
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2or an augmentation of a normally present nondismutase activity of SOD
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2transgenic mice ( 4 5 that suggest cells expressing mutant SOD do not necessarily have decreased dismutase function
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2In addition a SOD knockout mouse has normal motor neuron development ( 6 demonstrating
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2The toxicity of mutant SOD has been proposed to involve one or more of the
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2recently has been reported that the expression of FALS-associated mutant SOD in nerve growth factor (NGF)-differentiated NGF -differentiated PC12 cells primary
7808NGFnerve growth factor (beta polypeptide)NGF1.2expression of FALS-associated mutant SOD in nerve growth factor (NGF)-differentiated NGF -differentiated PC12 cells primary sympathetic neurons and hippocampal neurons leads
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD-induced2.4The present study explores the relationship of mutant SOD-induced death to calcineurin a calcium/calmodulin-dependent calcium calmodulin-dependent phosphatase and characterizes
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2proline residues aids normal folding and assembly of proteins including SOD and has other cellular functions ( 15
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2A recent report demonstrated that SOD normally protects calcineurin from inactivation ( 16
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2The present investigation demonstrates that the proapoptotic activity of mutant SOD is not related to calcineurin inhibition
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2CsA CsG and FK506 enhance cell death induced by mutant SOD and that this enhancement depends on rotamase inhibition
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))SOD3.2These findings suggest that mutant SOD may lead to increased protein damage or turnover and a
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase 11.0abstract it has been reported that expression of familial amyotrophic lateral sclerosis fals associated mutant cu/zn superoxide dismutase 1 sod induces apoptosis of neuronal cells in culture associated with an increase in reactive oxygen species.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0because both groups of drugs inhibit the rotamase activity of cyclophilins cyp but only the immunosuppressant analogs inhibit calcineurin activity these data suggest that rotamase inhibition underlies the enhanced cell death after sodv148g expression.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the importance of rotamase activity in mutant sod mediated apoptosis was supported by experiments showing that overexpressed wild type cyclophilin a cypa but not cypa with a rotamase active site point mutation protected cells from death after sodv148g expression.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0these data suggest that mutant sod produces a greater need for rotamase and also highlights possible new therapeutic strategies in fals.
437ALPIalkaline phosphatase, intestinalalkaline phosphatase1.0cypa histidine tagged 17 expression was detected by immunostaining with his probe h 15 rabbit polyclonal antiserum santa cruz biotechnology followed by anti rabbit igg alkaline phosphatase and x phosphate.
9388PRKAR1Aprotein kinase, cAMP-dependent, regulatory, type I, alpha (tissue specific extinguisher 1)camp dependent protein kinase1.0in brief r ii peptide dldvpipgrfdrrvsvaae; 0.25 _amp_#x003bc;m containing the phosphorylation site of type ii camp dependent protein kinase lc services woburn ma was phosphorylated by bovine brain protein kinase a catalytic subunit 30 _amp_#x003bc;g/ml plus _amp_#x0005b;_amp_#x003b3; 32 p_amp_#x0005d;atp 0.5 mm .
9380PRKACAprotein kinase, cAMP-dependent, catalytic, alphaprotein kinase a catalytic subunit1.0in brief r ii peptide dldvpipgrfdrrvsvaae; 0.25 _amp_#x003bc;m containing the phosphorylation site of type ii camp dependent protein kinase lc services woburn ma was phosphorylated by bovine brain protein kinase a catalytic subunit 30 _amp_#x003bc;g/ml plus _amp_#x0005b;_amp_#x003b3; 32 p_amp_#x0005d;atp 0.5 mm .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rotamase activity assay.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0a previously published 21 chymotrypsin coupled assay was used to measure rotamase activity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0cells were treated with csa and were harvested as described above for the rotamase assay.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0fig. 3 a shows that csa csg and fk506 immunosuppressant drugs known to inhibit calcineurin and the rotamase activity of immunophilin potentiated cell death induced by sodv148g expression fig 3 a .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0we also examined the effect of pkf 211_amp_#x02013;811 and psc 833 nonimmunosuppressant csa analogs that inhibit cyclophilin rotamase activity but not calcineurin 22 23 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the results suggest that csa enhances sodv148g induced cell death by inhibiting cyclophilin rotamase activity and not because of calcineurin inhibition.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0effect of csa on rotamase activity levels.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the above studies suggested that csa and its immunosuppressive analogs might enhance sod mutant induced cell death through its interference with rotamase activity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0it also raised the question as to whether there is a preexisting difference in the level of rotamase activity between sodv148g expressing and mock cells making the former cells more sensitive to csa.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0therefore we measured rotamase activity in mock wt and mutant sod expressing cells before and after csa treatment.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the data show that all cells had a similar amount of rotamase activity before csa treatment and that csa decreased rotamase activity to a similar level in all three groups table 1 with no significant differences in this inhibition in the sodv148g expressing cells vs. other csa treated groups.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0these results suggested that mutant sod expressing cells might be more sensitive to effects of decreased rotamase activity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0our interpretation of these studies is that human sod/rodent sod heterodimers that are formed in the transiently expressing cells may be more sensitive to conformational changes resulting from rotamase inhibition than the homogeneous rodent homodimers present in controls.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0to further examine the role of cyclophilin rotamase activity on mutant sod induced cell death we transfected ngf differentiated pc12 cells with wild type cypa cypawt cdna or cypa r55a cdna that contains a point mutation in the putative rotamase active
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0 activity on mutant sod induced cell death we transfected ngf differentiated pc12 cells with wild type cypa cypawt cdna or cypa r55a cdna that contains a point mutation in the putative rotamase active site.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0these results suggest that the rotamase function of cypa protects cells from death induced by sodv148g.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0these results suggest that modulating the rotamase activity is vital for the survival of mutant sod expressing cells.
8988PIN1peptidylprolyl cis/trans isomerase, NIMA-interacting 1prolyl isomerase1.0in addition to inhibiting calcineurin and blocking the mptp csa blocks peptidyl prolyl isomerase rotamase activity of cyclophilins.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0in addition to inhibiting calcineurin and blocking the mptp csa blocks peptidyl prolyl isomerase rotamase activity of cyclophilins.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0immunophilin rotamase activity is believed to have a variety of actions in neurons 15 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0to test whether csa enhanced sodv148g toxicity through rotamase inhibition we examined the effect of immunosuppressants csa csg and fk506 as well as nonimmunosuppressants pkf 211_amp_#x02013;811 or psc 833 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0nonimmunosuppressants do not influence calcineurin activity but do inhibit rotamase activity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0we found that both drug classes enhanced apoptosis induced by mutant sod indicating that the action of csa may be related to rotamase inhibition and not to calcineurin inhibition.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0a role for rotamase in mutant sod toxicity was supported by experiments comparing mutant sod induced cell death after expression of cypawt vs. an isomerase activity deficient mutant cypa r55a .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0although a recent report concluded that cypa r55a may have more rotamase activity than previously suspected 33 34 it appears that this residual activity is insufficient to permit folding of fully functional proteins 17 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0our data highlight the importance of rotamase activity in modifying the effect of mutant sod.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the findings that rotamase activity protects cells from mutant sod induced cell death and that there is roughly similar rotamase activity after csa treatment in wt and mutant sod expressing cells suggests that cells expressing mutant sod have a greater reliance on rotamase activity and has implications on our understanding of
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0 activity after csa treatment in wt and mutant sod expressing cells suggests that cells expressing mutant sod have a greater reliance on rotamase activity and has implications on our understanding of the mechanism of this toxicity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0the increased protein turnover may enhance the need for rotamase function.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rotamase also may be needed to refold proteins that are partly denatured by oxidative damage.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rotamase may be required to maintain proteins in a correct conformation during their transport in motor axons.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rotamase also may have a role in the normal folding of sod itself to help stabilize the enzyme or its dimers.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0 mutant sod expression than after sodwt expression suggesting that the mutant enzyme was more sensitive than wt to the effects of csa perhaps because the mutant sod was more sensitive to a decline in rotamase activity and the consequences of misfolding.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0it also may be that other proteins perhaps ones that interact with sod are more sensitive to decreased rotamase activity.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0our observations have implications regarding possible therapy of fals suggesting the potential use of chaperone proteins or of agents that modulate rotamase activity to correct the deficits.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rather our studies suggest that these drugs worsen the fals mediated cell death because of rotamase inhibition.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0table 1 mean rotamase and sod activity _amp_#x0005b;percent of control mock infected pc12 cells_amp_#x0005d;
7808NGFnerve growth factor (beta polypeptide)nerve growth factor1.0als amyotrophic lateral sclerosis sod cu/zn superoxide dismutase 1 fals familial als cyp cyclophilin wt wild type ngf nerve growth factor adv adenovirus csa cyclosporin a nmda n methyl d aspartate mptp mitochondrial permeability transition pore
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase 11.0als amyotrophic lateral sclerosis sod cu/zn superoxide dismutase 1 fals familial als cyp cyclophilin wt wild type ngf nerve growth factor adv adenovirus csa cyclosporin a nmda n methyl d aspartate mptp mitochondrial permeability transition pore
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase 11.0in 1993 mutations in cu/zn superoxide dismutase 1 sod were found to be associated with 20_amp_#x00025; of cases of familial als fals 1 .
7808NGFnerve growth factor (beta polypeptide)nerve growth factor1.0it recently has been reported that the expression of fals associated mutant sod in nerve growth factor ngf differentiated pc12 cells primary sympathetic neurons and hippocampal neurons leads to altered o 2 content and an apoptotic cell death 12 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0suppressants bind immunophilins _amp_#x0005b;the drug receptor: e.g. cyclophilins cyp or fk binding protein_amp_#x0005d; and the drug immunophilin complex inhibits calcineurin activity as well as the rotamase peptidyl prolyl cis_amp_#x02013;trans isomerase activity of the immunophilins 13 14 .
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0rotamase facilitates cis_amp_#x02013;trans isomerization of the peptide bond on the n terminal side of proline residues aids normal folding and assembly of proteins including sod and has other cellular functi
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0most importantly we show that immunosuppressant drugs csa csg and fk506 enhance cell death induced by mutant sod and that this enhancement depends on rotamase inhibition.
3711FKBP1AFK506 binding protein 1A, 12kDarotamase1.0these findings suggest that mutant sod may lead to increased protein damage or turnover and a greater reliance on rotamase activity.
11179SOD1superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))superoxide dismutase1.0superoxide dismutase|calcineurin|immunophilins|