Yan LI, Mei-qun CAO, Wen-cong TAO, et al. Effect of Huangqisan on Endoplasmic Reticulum Stress Signaling Pathway in Liver Tissues of High-fat Diet-induced Obese Rats. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(21):6-11(2019)
DOI:
Yan LI, Mei-qun CAO, Wen-cong TAO, et al. Effect of Huangqisan on Endoplasmic Reticulum Stress Signaling Pathway in Liver Tissues of High-fat Diet-induced Obese Rats. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(21):6-11(2019) DOI: 10.13422/j.cnki.syfjx.20191901.
Effect of Huangqisan on Endoplasmic Reticulum Stress Signaling Pathway in Liver Tissues of High-fat Diet-induced Obese Rats
To explore the effect of Huangqisan on endoplasmic reticulum stress signaling pathway in liver tissues of high-fat diet-induced obese rats and its mechanisms.
Method:
2
Male SD rats were selected and fed with high-fat diet for 7 weeks continuously to establish an obese rat model. Then
the rats were randomly divided into model group
low and high-dose Huangqisan group (1.2
2.4 g·kg
-1
)
and Lipitor group (2 mg·kg
-1
)
and orally administered with drugs for 15 consecutive weeks. The control group and the model group were perfused with the same volume of normal saline. The body weight
epididymal fat coefficient and liver coefficient of each group were determined separately. Fasting plasma glucose (FPG)
total cholesterol (TC)
triglyceride (TG) and low-density lipoprotein cholesterol (LDL-C) were determined by biochemical reagent method. The epididymal visceral adipose tissue and liver pathological changes were observed by hematoxylin and eosin (HE) staining. And the protein expression levels of sterol regulation element-binding transcription factor 1 (SREBP-1c)
protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK)
inositol requiring enzyme 1 (IRE1
α
)
p-inositol requiring enzyme 1 (p-IRE1
α
) in liver tissues were detected by Western blot methods.
Result:
2
Compared with the control group
the body weight
epididymal fat coefficient and liver coefficient of the model group were significantly increased(
P
<
0.01)
and the levels of FPG
TC
TG and LDL-C were also higher than those of the control group(
P
<
0.05
P
<
0.01). The cell volume of epididymal fat and liver in the model group were enlarged
and numerous fat vesicles were observed in the cells. Meanwhile
the protein expression levels of the endoplasmic reticulum stress-related factors SREBP-1c
PERK
IRE1
α
/p-IRE1
α
were increased(
P
<
0.05
P
<
0.01). Compared with the model group
high-dose and low-dose Huangqisan groups could significantly reduce the body weight
epididymal fat coefficient
liver coefficient and levels of glucose and lipid(
P
<
0.05
P
<
0.01)
and pathological examination showed that the lesion degrees of epididymal fat and liver tissues were alleviated obviously. In addition
Huangqisan could mostly reduce SREBP-1c
PERK
IRE1
α
/p-IRE1
α
protein expression levels to different degrees(
P
<
0.05
P
<
0.01).
Conclusion:
2
Huangqisan could regulate the glucose and lipid metabolism
alleviate liver pathology and reduce body weight
and its mechanism was probably related to reduction of SREBP-1c
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