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1.河北中医学院,石家庄 050200
2.河北中医学院中西医结合研究所,河北省中西医结合肝肾病证研究重点实验室,石家庄 050200
张亚楠,在读硕士,从事中医药防治心血管疾病的机制研究,E-mail:18833446990@163.com
司秋菊,教授,硕士生导师,从事中医药防治心血管疾病的机制研究,E-mail:siqiuju@163.com
收稿日期:2021-12-13,
网络出版日期:2022-02-08,
纸质出版日期:2022-08-20
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张亚楠,丁英钧,徐华洲等.加味桃核承气汤对糖尿病心肌病大鼠NLRP3炎症小体的影响[J].中国实验方剂学杂志,2022,28(16):59-65.
ZHANG Yanan,DING Yingjun,XU Huazhou,et al.Effect of Modified Taohe Chengqitang on NLRP3 Inflammasomes in Rats with Diabetic Cardiomyopathy[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):59-65.
张亚楠,丁英钧,徐华洲等.加味桃核承气汤对糖尿病心肌病大鼠NLRP3炎症小体的影响[J].中国实验方剂学杂志,2022,28(16):59-65. DOI: 10.13422/j.cnki.syfjx.20220780.
ZHANG Yanan,DING Yingjun,XU Huazhou,et al.Effect of Modified Taohe Chengqitang on NLRP3 Inflammasomes in Rats with Diabetic Cardiomyopathy[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(16):59-65. DOI: 10.13422/j.cnki.syfjx.20220780.
目的
2
探讨加味桃核承气汤对糖尿病心肌病大鼠NOD样受体蛋白3(NLRP3)炎症小体激活的影响。
方法
2
选取3~4周龄SPF级雄性SD大鼠,随机分为正常组和造模组。造模组大鼠采用高脂饲料喂养4周后,给予链脲佐菌素(STZ)腹腔注射(35 mg·kg
-1
)制备糖尿病大鼠模型,再按照空腹血糖随机分为模型组、加味桃核承气汤低、高剂量组(11.7、23.4 g·kg
-1
)、盐酸二甲双胍组(67.5 mg·kg
-1
)。各组连续灌胃给药8周后经超声成像平台检测大鼠心脏功能及结构。股动脉取血检测大鼠空腹血糖(FBG)、甘油三酯(TC)、总胆固醇(TG);苏木素-伊红(HE)染色观察大鼠心肌病理形态学改变;酶联免疫吸附测定法(ELISA)检测大鼠血清白细胞介素-1
β
(IL-1
β
)及白细胞介素-18(IL-18)水平;蛋白免疫印迹法(Western blot)检测心肌组织NLRP3、ASC、Caspase-1、p-NF-
κ
B p65蛋白表达的影响。
结果
2
与正常组比较,模型组大鼠FBG、TC、TG水平显著升高(
P
<
0.01),左室射血分数(EF)、左室短轴缩短率(FS)明显降低(
P
<
0.05),HE染色可见心肌细胞肥大、心肌纤维化,血清中IL-1
β
、IL-18含量及心肌组织NLRP3、ASC、Caspase-1、p-NF-
κ
B p65蛋白表达均显著增高(
P
<
0.01)。与模型组比较,加味桃核承气汤低、高剂量组及二甲双胍组可有效降低大鼠FBG、TC、TG水平(
P
<
0.05),EF、FS均明显改善(
P
<
0.05),大鼠心肌组织病理学损伤明显改善,同时血清IL-1
β
、IL-18含量及心肌组织NLRP3、ASC、Caspase-1、p-NF-
κ
B p65蛋白表达均明显降低(
P
<
0.05),其中加味桃核承气汤高剂量组改善更明显。
结论
2
桃核承气汤加味可通过抑制NLRP3炎症小体激活从而发挥保护心肌作用。
Objective
2
To investigate the effect of modified Taohe Chengqitang on NOD-like receptor protein 3 (NLRP3) inflammasome activation in rats with diabetic cardiomyopathy.
Method
2
SPF male SD rats aged 3-4 weeks were randomly divided into a normal group and an experimental group. The rats in the experimental group were fed on a high-fat diet for 4 weeks and then received intraperitoneal injection of streptozotocin (STZ) at 35 mg·kg
-1
to induce the diabetes model. The rats in the experimental group were randomly divided into model group, low- and high-dose modified Taohe Chengqitang groups (11.7 g·kg
-1
and 23.4 g·kg
-1
), and metformin hydrochloride group (67.5 mg·kg
-1
) according to the fast blood glucose (FBG). The cardiac function and structure of rats were detected by ultrasonic imaging after 8 weeks of continuous intragastric administration. Blood samples from the femoral artery were collected to detect FBG, triglyceride (TC), and total cholesterol (TG) of rats. Hematoxylin-eosin (HE) staining was used to observe the pathological changes in rat myocardium. Serum levels of interleukin-1
β
(IL-1
β
) and interleukin-18 (IL-18) were determined by enzyme-linked immunosorbent assay (ELISA). The protein expression of NLRP3, apoptosis-associated speck-like protein containing a CARD (ASC), cysteinyl aspartate-specific protease 1 (Caspase-1), and phosphorylated nuclear factor kappa-B p65 (p-NF-
κ
B p65) in the myocardium was detected by Western blot.
Result
2
Compared with the normal group, the model group showed increased levels of FBG, TC, and TG (
P
<
0.01), decreased left ventricular ejection fraction (EF) and left ventricular fractional shortening (FS) (
P
<
0.05), myocardial hypertrophy and myocardial fibrosis as revealed by HE staining, increased serum levels of 1L-1
β
and 1L-18 and protein expression of NLRP3, ASC, Caspase-1, and p-NF-
κ
B p65 in myocardial tissues (
P
<
0.01). Compared with the model group, the modified Taohe Chengqitang groups and the metformin group showed reduced levels of FBG, TC, and TG (
P
<
0.05), restored EF and FS (
P
<
0.05), improved pathological changes in myocardial tissues, and decreased serum levels of IL-1
β
and IL-18 and protein expression of NLRP3, ASC, Caspase-1, and p-NF-
κ
B p65 in myocardial tissues (
P
<
0.05). The improvement was more significant in the high-dose modified Taohe Chengqitang group (
P
<
0.05).
Conclusion
2
Modified Taohe Chengqitang can protect the myocardium by inhibiting the activation of NLRP3 inflammasomes.
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