Abstract：
:The pathogenesis of chronic cyclosporine A (CsA) nephrotoxicity has not been elucidated, but apoptosis is thought to play an important role in CsA induced tubular atrophy. Recently Fas-Fas ligand system mediated apoptosis has been frequently reported in many epithelial cells as well as in T lymphocytes. We investigated the ability of CsA to induce apoptosis in cultured human proximal tubular epithelial cells and also the effect of alpha-MSH on them. Fas, Fas ligand, and an intracellular adaptor protein, Fas-associating protein with death domain (FADD) expression, and poly-ADP ribose polymerase (PARP) cleavage were also studied. CsA induced apoptosis in cultured tubular epithelial cells demonstrated by increased number of TUNEL positive cells and it was accompanied by a significant increase in Fas mRNA and Fas ligand protein expressions. FADD and the cleavage product of PARP also increased, indicating the activation of caspase. In alpha-MSH co-treated cells, apoptosis markedly decreased with downregulation of Fas, Fas ligand and FADD expressions and also the cleavage product of PARP. In conclusion, these data suggest that tubular cell apoptosis mediated by Fas system may play a role in tubular atrophy in chronic CsA nephrotoxicity and pretreatment of alpha-MSH may have a some inhibitory effect on CsA induced tubular cell apoptosis.
journal_name
J Korean Med Scijournal_title
Journal of Korean medical scienceauthors
Jo SK,Lee SY,Han SY,Cha DR,Cho WY,Kim HK,Won NHdoi
10.3346/jkms.2001.16.5.603keywords:
subject
Has Abstractpub_date
2001-10-01 00:00:00pages
603-9issue
5eissn
1011-8934issn
1598-6357pii
200110603journal_volume
16pub_type
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