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黑龙江中医药大学基础医学院,哈尔滨 150040
Received:19 November 2024,
Revised:14 February 2025,
Accepted:2025-02-14,
Published:15 April 2025
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李君,齐雅芝,唐娅等.延胡索总生物碱对糖尿病心肌病大鼠铜死亡的调控作用及机制 Δ[J].中国药房,2025,36(07):801-806.
LI Jun,QI Yazhi,TANG Ya,et al.Effects and mechanism of total alkaloids of Corydalis Rhizoma on the regulation of cuproptosis in rats with diabetic cardiomyopathy[J].ZHONGGUO YAOFANG,2025,36(07):801-806.
李君,齐雅芝,唐娅等.延胡索总生物碱对糖尿病心肌病大鼠铜死亡的调控作用及机制 Δ[J].中国药房,2025,36(07):801-806. DOI: 10.6039/j.issn.1001-0408.2025.07.06.
LI Jun,QI Yazhi,TANG Ya,et al.Effects and mechanism of total alkaloids of Corydalis Rhizoma on the regulation of cuproptosis in rats with diabetic cardiomyopathy[J].ZHONGGUO YAOFANG,2025,36(07):801-806. DOI: 10.6039/j.issn.1001-0408.2025.07.06.
目的
2
基于沉默信息调节因子1(Sirt1)/肿瘤抑制因子53(P53)信号通路,探讨延胡索总生物碱(TAC)对糖尿病心肌病(DCM)大鼠铜死亡的调控作用及机制。
方法
2
采用高脂高糖饲料喂养+腹腔注射链脲佐菌素建立DCM大鼠模型。取32只造模成功的大鼠随机分为模型组和TAC低、中、高剂量组(7、10.5、14 mg/kg),每组8只。另取8只大鼠以正常饲料喂养作为正常对照组。各组大鼠灌胃相应药物或生理盐水,每天1次,连续4周。末次给药后,检测大鼠空腹血糖(FBG)水平;检测大鼠血清和心肌组织中肌酸激酶(CK)、CK同工酶MB(CK-MB)、乳酸脱氢酶(LDH)水平;观察大鼠心肌组织病理学形态、纤维化程度及Cu
2+
沉积情况;检测大鼠心肌组织中Cu
2+
、谷胱甘肽(GSH)水平以及Sirt1/P53信号通路相关蛋白[Sirt1、P53、溶质家族载体7成员11(SLC7A11)
]
、铁硫簇相关蛋白[铁氧还蛋白1(FDX1)、硫辛酸合成酶(LIAS)、线粒体乌头酸酶2(ACO2)、泛醌氧化还原酶核心亚基S8(NDUFS8)、二氢硫辛酸乙酰基转移酶(DLAT)、二氢硫辛酸二酰基转移酶(DLST)
]
、热休克蛋白70(HSP70)表达水平。
结果
2
与正常对照组相比,模型组大鼠FBG水平,血清和心肌组织中CK、CK-MB、LDH水平,心肌组织中Cu
2+
水平以及P53、HSP70蛋白表达水平均显著升高(
P
<0.05);心肌组织中GSH水平和Sirt1、SLC7A11、FDX1、LIAS、ACO2、NDUFS8、DLAT、DLST蛋白表达水平均显著降低
(
P
<0.05);心肌组织病理损伤严重,出现较多炎症细胞浸润,且纤维化明显,Cu
2+
沉积增多。与模型组比较,TAC各剂量组大鼠上述大部分定量指标均显著逆转(
P
<0.05);心肌组织病理损伤减轻,纤维化和Cu
2+
沉积减少。
结论
2
TAC可改善大鼠DCM,其作用机制可能与激活Sirt1/P53信号通路活性,促进GSH与Cu
2+
的螯合作用,抑制心肌细胞铜死亡有关。
OBJECTIVE
2
To investigate the effects and mechanism of total alkaloids of Corydalis Rhizoma (TAC) on the regulation of cuproptosis in rats with diabetic cardiomyopathy (DCM) based on silence information regulator 1(Sirt1)/tumor protein 53(P53)signaling pathway.
METHODS
2
DCM rat model was induced by high-fat and high-sugar diet and intraperitoneal injection of streptozotocin. Thirty-two model rats were randomly divided into model group, TAC low-dose, medium-dose and high-dose groups (7, 10.5, 14 mg/kg), with 8 rats in each group. An additional 8 rats were assigned to normal control group. Related drugs or normal saline were administered intragastrically in each group, once a day, for 4 weeks. After the last medication, the fasting blood glucose (FBG) levels of the rats were measured. The levels of myocardial creatine kinase (CK), creatine kinase isoenzyme (CK-MB), and lactate dehydrogenase (LDH) in serum and myocardial tissue of rats were all detected. The pathological morphology, fibrosis degree, and Cu
2+
deposition of myocardial tissue in rats were observed. The levels of Cu
2+
and glutathione (GSH) in myocardial tissue, the expressions of Sirt1/P53 signaling pathway-related proteins [Sirt1, P53, solute carrier family 7 membrane 11 (SLC7A11)
]
, and iron-sulfur cluster-related proteins [ferredoxin 1 (FDX1), lipoic acid synthetase (LIAS), aconitase 2 (ACO2), NADH-ubiquinone oxidoreductase core subunit S8 (NDUFS8), dihydrolipoamide acetyltransferase (DLAT), dihydrolipoamide succinyltransferase (DLST)
]
, and heat shock protein 70 (HSP70) were all determined.
RESULTS
2
Compared with normal control group, the model group exhibited significantly elevated levels of FBG, CK, CK-MB and LDH in both serum and myocardial tissue, as well as increased levels of Cu
2+
in myocardial tissue and the expression of P53 and HSP70 proteins (
P
<0.05); the level of GSH and the expression levels of Sirt1, SLC7A11, FDX1, LIAS, ACO2, NDUFS8, DLAT, and DLST proteins in myocardial tissue were all significantly decreased (
P
<0.05); the myocardial tissue exhibited severe pathological damage, with numerous inflammatory cell infiltrations and significant fibrosis, as well as increased deposition of Cu
2+
. Compared with model group, most of the above quantitative indicators in rats were significantly reversed in TAC groups (
P
<0.05); the pathological damage to the myocardial tissue was alleviated, with reduced fibrosis and Cu
2+
deposition.
CONCLUSIONS
2
TAC can ameliorate DCM in rats, and its mechanism of action may be related to activating the activity of the Sirt1/P53 signaling pathway, promoting the chelation of GSH with Cu
2+
, and inhibiting cuproptosis of cardiomyocyte.
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