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.
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.
Effect of Modified Taohe Chengqitang on NLRP3 Inflammasomes in Rats with Diabetic Cardiomyopathy
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.
关键词
Keywords
references
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