Protective effect and mechanism of pharmacologic preconditioning induced by sodium ferulate on primary cultured myocardial cell injury by anoxia/reoxygenation
Fu, Y-jun.; He, M.
Yao Xue Xue Bao 39(5): 325-327
2004
ISSN/ISBN: 0513-4870 PMID: 15338871 Document Number: 568272
Aim To study the preconditioning effects and mechanism of action of sodium ferulate (SF) on primary cultured myocardial cell injury induced by anoxia/reoxygenation. Methods Cultured myocardial cells of neonatal SD rats were randomly divided into ten groups : control group : without any treatment; anoxia/reoxygenation group (A/R), reoxygenation of 1 h following anoxia of 3 h; anoxia preconditioning group (AP), reoxygenation of 30 mins following anoxia of 30 mins, three times before the same procedure as group A/R; SF preconditioning groups, 20 mins of SF (1.68, 0.42, 0. 105 mmol cntdot L-1 in final concentration) preconditioning followed by 10 rains wash out before A/R; KATP+ channel Mocker group, NOS inhibitor group and PKC inhibitor group, adding gliberclamide, L-NAME, ploymyxin B at final concentration of 12 g cntdot mL-1, 50 mumol . L-1, 50 mumol cntdot L-1, to culture medium respectively 10 min before the same procedures as SF preconditioning group (1.68 mmol cntdot L-1). Myocardial cells pulse rate and rhythm, myocyte viability, the activity of LDH and CK in culture, the contents of intracelluar MDA, LD in myocardial cells, the activity of SOD and GSH-Px of the cultured myocardial cell were measured at the end of experiment. Results Compared with control group, anoxia/reoxygenation caused great increases of levels of LDH, CK, MDA and LD (P < 0.01), decreases of myocardial cells pulse rate, cell viability, SOD and GSH-Px ( P < 0.01); SF preconditioning significantly attenualed these increases and decreases. Glib, L-NAME, and Ploy B partly abolished the effects of SF preconditioning. Conclusion SF preconditioning is effective in protecting myocardial cells from anoxia injury. The cardioprotective effect of SF preconditioning is produced by multiple factors.