A role for metals and free radicals in the induction of apoptosis in thymocytes

FEBS Letters

Ross, David¹  Wolfe, James T.¹  Cohen, Gerald M.¹ 

[1] MRC Toxicology Unit, Hodgkin Building, University of Leicester, P.O. Box 138, Lancaster Road, Leicester, LE1 9HN, UK

关键词: Thymocyte apoptosis;    Copper;    Free radicals;    NF-ϰB;    Rat;    Tempol;    4-hydroxy-2;    2;    6;    6-tetramethylpiperidine-N-oxyl;    PBN;    α-phenyl-tert-butylnitrone;    BHA;    butylated hydroxyanisole;    DMPO;    5;    5′-dimethyl-1-pyrroline-N-oxide;    PDTC;    pyrrolidine dithiocarbamate;    CP-94;    1;    2-diethyl-3-hydroxypyridin-4-one;    DPDD;    N;    N′-diphenyl-1;    4-phenylenediamine;    Detapac;    diethylenetriaminepentaacetic acid;   

DOI  :  10.1016/0014-5793(94)00920-1

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Recent reports have implicated a possible but undefined role for reactive oxygen species in the induction and mediation of apoptosis. In the present study, the role of free radicals and metal ions in apoptosis induced in rat thymocytes by dexamethasone and etoposide was examined. Copper chelators, but not iron specific chelators, inhibited apoptosis induced by both these stimuli. Several antioxidants also possessed potent inhibitory effects. We therefore propose that diverse agents may induce apoptosis in thymocytes by a common mechanism involving a copper mediated Fenton reaction, generating site specific hydroxyl radicals, possibly as a result of activation of the redox sensitive transcription factor NF-ϰB.

【 授权许可】

Unknown