摘要
目的 :探讨 1,6 -二磷酸果糖 (FDP)对阿霉素 (ADR)所引起的大鼠心肌细胞内游离钙及心肌肌浆网钙 -ATP酶 (SRCa2 + -ATPase)活性变化的影响。方法 :给大鼠腹腔注射ADR(2 5mg·kg-1,隔日 1次 ,共 6次 ) ,给ADR处理的大鼠腹腔注射不同剂量的FDP(隔日 1次 ,共 2 1次 )进行干预。采用双抗体双夹心ELISA法定量测定血清肌钙蛋白I(CTnI) ;采用抗肌酸激酶同工酶 (CK -MB)单克隆抗体包被小球测定血清CK -MB ;用荧光分光光密度计测定心肌细胞内游离钙 (MyoCa2 + )浓度 ;用无机磷酸根法测定心肌肌浆网钙 -ATP酶 (SRCa2 + -ATPase)活性。结果 :FDP(30 0、6 0 0、12 0 0mg·kg-1)干预ADR处理的大鼠后 ,可显著降低血清CtnI、CK -MB及心肌细胞内MyoCa2 + 值 ,显著增高SRCa2 + -ATPase活性 (P <0 0 1)。结论 :FDP能通过降低心肌细胞内游离钙和对SRCa2 + -ATPase活性的改变 ,起到减轻ADR对心肌的毒性作用。
AIM: To study the effects of fructose-1,6-diphosphate (FDP) on adriamycin (ADR)-induced calcium and sarcoplasmic reticulum Ca 2+-ATPase activity in cardiomyocytes of rats. METHODS: Rats were treated with ADR by intraperitoneal injection (2 5 mg·kg -1 body weight) once every two days for 11 days, and then ADR-treated rats were intervened by FDP at different dosages (ip) once every other day for 41 days. Enzyme linked immune absorption assay (ELISA) was employed to detect froponin I (CTnI). CK-MB was examined by monoclonal antibody. Intracellular free calcium concentration was measured on fluorescent spectrophotometry and SRCa 2+-ATPase activity was examined by inorganic phosphate. RESULTS: FDP (300, 600, 1 200 mg·kg -1) significantly reduced the levels of CTnI and CK-MB in serum. Decreased calcium and increased SRCa 2+-ATPase activity in cardiomyocytes were also observed when ADR-treated rats were intervened by FDP (P<0 01). CONCLUSION: FDP reduced the injury of cardiotoxicity induced by ADR via decreasing intracellular free calcium and increasing SRCa 2+-ATPase activity in cardiomyocytes.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2004年第6期941-943,共3页
Chinese Journal of Pathophysiology
关键词
果糖-1
6-二磷酸
多柔比星
心肌
钙
肌浆网钙-ATP酶
Fructose-1,6-diphosphate
Doxorubicin
Myocardium
Calcium
Sarcoplasmic reticulum Ca 2+-ATPase
