Page 21 - 2019年10月第30卷第19期
P. 21
促红细胞生成素衍生物螺旋B表面肽对表柔比星诱发大鼠心肌
损伤的改善作用及机制研究 Δ
于秀燕 ,李跃荣 ,徐会圃 ,赵冬冬 ,陈薇薇 ,郭纪伟 ,马宝新 (1.滨州医学院附属医院心血管内科,山东 滨
2
2
1
1 #
1*
1
1
州 256603;2.滨州医学院肿瘤研究实验室,山东 滨州 256603)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2019)19-2608-06
DOI 10.6039/j.issn.1001-0408.2019.19.04
摘 要 目的:研究促红细胞生成素衍生物螺旋B表面肽(HBSP)对表柔比星诱发大鼠心肌损伤的改善作用及机制。方法:将SD
大鼠随机分为对照组、模型组、促红细胞生成素(EPO)组和HBSP组,每组10只。除对照组外,其余各组大鼠均腹腔注射表柔比星
2.5 mg/kg,每周1次,连续6周复制心肌损伤模型,EPO组和HBSP组大鼠分别腹腔注射重组人促红细胞生成素(rhEPO)5 000 u/kg
或 HBSP 60 μg/kg,每周 3 次(分别于表柔比星给药前 1 天、给药后第 1 天以及给药后第 3 天给药),连续 6 周。以首次给药开始计
时,第11周称各组大鼠体质量,超声心动图检测其心功能[左室舒张末期内径(LVIDd)、射血分数(EF)、缩短分数(FS)及心输出量
(CO)],酶联免疫吸附法测定其血清中肌钙蛋白I(cTnI)、氨基末端B型利钠肽原(NT-proBNP)的含量,逆转录-聚合酶链式反应检
测其心肌组织中磷脂酰肌醇-3-激酶(PI3K)和蛋白激酶B(Akt)mRNA的表达,Western blot法检测其心肌组织中p-PI3K和p-Akt蛋
白的表达。结果:在研究期内,模型组有2只大鼠死亡,EPO组有1只大鼠死亡,HBSP组无大鼠死亡。与对照组比较,模型组大鼠
体质量、EF、FS、CO均显著降低,LVIDd和cTnI、NT-proBNP含量均显著增加,PI3K、Akt mRNA表达水平及p-PI3K、p-Akt蛋白表达
水平均显著降低,以上差异均有统计学意义(P<0.05)。与模型组比较,EPO 组及 HBSP 组大鼠体质量、EF、FS、CO 均显著增加,
LVIDd和cTnI、NT-proBNP含量显著降低,PI3K、Akt mRNA表达水平及p-PI3K、p-Akt蛋白表达水平均显著升高,以上差异均有统
计学意义(P<0.05)。与 EPO 组比较,HBSP 组大鼠 cTnI、NT-proBNP 含量均显著降低,差异均有统计学意义(P<0.05)。结论:
HBSP 对大鼠心肌损伤具有与 EPO 相当的改善作用,且毒性更小,二者改善心肌损伤的作用机制可能与激活 PI3K/Akt 信号通路
有关。
关键词 螺旋B表面肽;表柔比星;心肌损伤;磷脂酰肌醇-3-激酶;蛋白激酶B;大鼠
Improvement Effects of Erythropoietin Derivative Helix B Surface Peptide on Epirubicin-induced
Myocardial Injury in Rats and Its Mechanism Study
YU Xiuyan ,LI Yuerong ,XU Huipu ,ZHAO Dongdong ,CHEN Weiwei ,GUO Jiwei ,MA Baoxin(1.Dept. of
1
1
1
1
1
2
2
Cardiology,the Affiliated Hospital of Binzhou Medical College,Shandong Binzhou 256603,China;2.Cancer
Research Laboratory,Binzhou Medical College,Shandong Binzhou 256603,China)
ABSTRACT OBJECTIVE:To study the improvement effects and its mechanism of erythropoietin derivative helix B surface
peptide(HBSP)on epirubicin-induced myocardial injury in rats. METHODS:SD rats were randomly divided into control group,
model group,erythropoietin(EPO)group and HBSP group,with 10 rats in each group. Except for control group,other groups
were given epirubicin 2.5 mg/kg intraperitoneally,once a week,for consecutive 6 weeks to induce myocardial injury model. EPO
group and HBSP groups were given rhEPO 5 000 u/kg or HBSP 60 μ g/kg intraperitoneally,3 times a week(one day before
medication,first day and third day after medication of epirubicin),for consecutive 6 weeks. At the beginning of the first
administration,the rats were weighed at the 11th week. The cardiac function was measured by echocardiography [left ventricular
end-diastolic diameter(LVIDd),ejection fraction(EF),fractional shortening(FS)and cardiac output(CO)]. The serum levels of
troponin I(cTnI)and amino-terminal B-type natriuretic peptide(NT-proBNP)were determined by ELISA. mRNA expression of
PI3K and Akt in myocardial tissue was detected by RT-PCR. The protein expression of p-PI3K and p-Akt in rat myocardium were
detected by Western blot. RESULTS:During research period,two rats died in model group,one in EPO group and none in HBSP
group. Compared with control group,body weight,the levels
Δ 基金项目:国家自然科学基金资助项目(No.31801085);山东省
of EF,FS and CO were decreased significantly in model
医药卫生科技计划项目(No.2016WS0049)
group,while the contents of LVIDd and cTnI,NT-proBNP
* 硕 士 研 究 生 。 研 究 方 向 :继 发 性 心 肌 损 伤 。 E-mail:
were increased significantly;mRNA expression of PI3K and
1776738263@qq.com
Akt as well as protein expression of p-PI3K and p-Akt were
# 通信作者:副主任医师,博士。研究方向:继发性心肌损伤。
E-mail:343324710@qq.com decreased significantly, above differences were statistical
·2608 · China Pharmacy 2019 Vol. 30 No. 19 中国药房 2019年第30卷第19期