GE Xiao-fen, LI Sha-sha, LIU Yan-hua, et al. Protective Effect and Mechanism of Kuntai Capsule on Angiotensin Ⅱ-Induced Hypertension in Ovariectomized Rats. [J]. Chinese Journal of Integrative Medicine 29(6):526-533(2023)
DOI:
GE Xiao-fen, LI Sha-sha, LIU Yan-hua, et al. Protective Effect and Mechanism of Kuntai Capsule on Angiotensin Ⅱ-Induced Hypertension in Ovariectomized Rats. [J]. Chinese Journal of Integrative Medicine 29(6):526-533(2023) DOI: 10.1007/s11655-022-3514-3.
Protective Effect and Mechanism of Kuntai Capsule on Angiotensin Ⅱ-Induced Hypertension in Ovariectomized Rats
摘要
Abstract
Objective:
2
To explore the protective effect and mechanism of Kuntai (KT) Capsule on angiotensin Ⅱ (AngⅡ)-induced hypertension in ovariectomized (OVX) rats.
Methods:
2
Fifty-four rats were randomly divided into 6 groups according to a random number table
9 in each group: control
OVX sham+AngⅡ
OVX
OVX+AngⅡ
OVX+AngⅡ+E
2
and OVX+AngⅡ+KT. OVX rats model was constructed by retroperitoneal bilateral ovariectomy. After 4 weeks of pretreatment with KT Capsule [0.8 g/(kg•d) and 17-β-estradiol (E
2
1.2 mg/(kg•d)] respectively
AngⅡ was injected into a micro-osmotic pump with a syringe to establish a hypertensive rat model. Blood pressure of rat tail artery was measured in a wake state of rats using a non-invasive sphygmomanometer. Blood pressure changes were compared between the intervention groups (OVX+AngⅡ+KT
OVX+AngⅡ+E
2
) and the negative control group (OVX+AngⅡ). Serum malondialdehyde (MDA) level and superoxide dismutase (SOD) activity were detected respectively. The expressions of oxidative stress-related protein superoxide dismutase2 (SOD2) and anti-thioredoxin (TRX)
autophagy marker protein [beclin1
light chain (LC) 3Ⅱ/Ⅰ ratio and autophagy canonical pathway protein phosphatidylinositol 3-kinase (PI3K)/serine/threonine kinase (AKT)-mammalian target of rapamycin (mTOR)] were evaluated by Western blotting.
Results:
2
Compared with the OVX+AngⅡ group
the systolic blood pressure of OVX+AngⅡ+KT group was significantly lowered (
P
<
0.05) but not the diastolic blood pressure. Besides
SOD2 and TRX protein levels in mycardial tissues were significantly reduced in the OVX+AngⅡ+KT group compared with the OVX+AngⅡ group (
P
<
0.05). Oxidative stress serum markers MDA and SOD were down- and up-regulated in the OVX+AngⅡ+KT group
respectively (
P
<
0.05). Compared with OVX+AngⅡ group
the levels of cardiac proteins beclin-1 and LC3Ⅱ/LC3Ⅰ in OVX+AngⅡ+KT group were also up-regulated (
P
<
0.05)
and the expression levels of p-PI3K
p-AKT and mTOR protein were down-regulated (
P
<
0.05).
Conclusion:
2
KT could protect blood pressure of AngⅡ-induced OVX rats by inhibiting oxidative stress and up-regulating protective autophagy.
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Related Institution
Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine
Central Laboratory, Affiliated Hospital of Shandong University of Traditional Chinese Medicine
First Clinical Medical College, Shandong University of Traditional Chinese Medicine
Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine
State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Science, Xiamen University