GRP78 induction by cyclosporin A in human HeLa cells

FEBS Letters

Pinto, Moïse¹  Paslaru, Liliana²  Morange, Michel¹ 

[1] Groupe de Biologie Moléculaire du stress, Unité de Génétique moléculaire, Ecole Normale Supérieure, 46 rue d'Ulm, 75230 Paris Cedex 05, France;University of Medicine and Pharmacy ‘Carol Davila’, Post-Graduate Department of Biochemistry, Fundeni Hospital, Sos Fundeni no. 258, Bucharest, Romania

关键词: Cyclosporin A;    Glucose regulated protein (GRP78);    Peptidyl-prolyl-isomerase;    Heat-shock;   

DOI  :  10.1016/0014-5793(94)00794-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Immunosuppressive drugs such as cyclosporin A (CsA) and FK506 are known to have pleiotropic effects on cells. Here we demonstrate that treatment of HeLa cells with low concentrations of CsA (but not of FK506) induces the synthesis of a stress protein, GRP78, located inside the endoplasmic reticulum. High concentrations of CsA lead to a general decrease in protein synthesis. When cells are stressed (heat-shocked) during the CsA treatment, the synthesis of heat shock proteins is reinforced. FK506 has no detectable effects at any concentration. The mechanism of induction of GRP78 by CsA remains presently unknown. Whatever the mechanism involved, GRP78 overexpression might be responsible for some of the physiological effects of CsA.

【 授权许可】

Unknown