Prostaglandin production and cellular aging |
| |
Authors: | Linda Taylor Edward Schneider James Smith Peter Polgar |
| |
Institution: | 1. Boston University School of Medicine, Boston, MA 02218, U.S.A.;2. National Institute on Aging, National Institute of Health, Bethesda, MD 20205, U.S.A.;3. W. Alton Jones Cell Science Center, Lake Placid, NY 12946 U.S.A. |
| |
Abstract: | Prostaglandin (PG) production by human embryo lung fibroblasts (HELF) is stimulated by a number of effectors including angiotensin, thrombin, bradykinin and ascorbic acid. The types of prostaglandins produced are to a degree effector-dependent. For example, angiotensin stimulates mainly PGE2 synthesis, thrombin stimulates production of both PGE2 and prostacyclin while bradykinin and ascorbic acid stimulate production of PGE2, PGF2α, prostacyclin and thromboxane A2. Upon senescence in culture, prostacyclin (PGI2) production by HELF drops dramatically in response to ascorbic or arachidonic acids. An overall drop in prostaglandin synthesis is observed with bradykinin stimulation. Prostaglandin production is also related to senescence in human skin fibroblasts (HSF). These cells produce predominantly PGI2. Prostacyclin production in response to bradykinin drops in HSF as they are obtained from individuals of increasing chronologic age. Thus our results indicate changes in prostaglandin production upon senescence, a dependency of these changes on the given stimulus and a correlation between in vivo and in culture aging with respect to prostaglandin production. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|