1.中国医学科学院阜外医院深圳医院心内科,广东 深圳 518057
2.深圳市前海蛇口自贸区医院心内科,广东 深圳 518067
郭文玉,第一作者,研究方向: 心血管疾病机制,E-mail: Guowenyu0720@163.com
收稿:2025-07-29,
修回:2025-11-10,
录用:2025-12-08,
纸质出版:2026-01-20
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郭文玉,高佳佳,段玮丽等.黄芪甲苷通过抑制STING通路减轻D-半乳糖诱导的心肌细胞衰老和凋亡[J].中山大学学报(医学科学版),2026,47(01):133-142.
GUO Wenyu,GAO Jiajia,DUAN Weili,et al.Astragaloside Ⅳ alleviates D-galactose-induced cardiomyocytes senescence and apoptosis by inhibiting the STING pathway[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(01):133-142.
郭文玉,高佳佳,段玮丽等.黄芪甲苷通过抑制STING通路减轻D-半乳糖诱导的心肌细胞衰老和凋亡[J].中山大学学报(医学科学版),2026,47(01):133-142. DOI: 10.11714/jsysu.med.YX20250094.
GUO Wenyu,GAO Jiajia,DUAN Weili,et al.Astragaloside Ⅳ alleviates D-galactose-induced cardiomyocytes senescence and apoptosis by inhibiting the STING pathway[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(01):133-142. DOI: 10.11714/jsysu.med.YX20250094.
目的
2
探讨黄芪甲苷(AS-Ⅳ)对D-半乳糖(D-gal)诱导的心肌细胞衰老的保护作用及其潜在机制。
方法
2
以心肌细胞H9C2为模型,采用D-gal诱导心肌细胞衰老,通过CCK-8法检测细胞活力,β-半乳糖苷酶(SA-β-Gal)染色评估细胞衰老程度,ROS检测细胞内活性氧水平,TUNEL检测细胞凋亡程度,qRT-PCR和Western blot检测衰老相关基因和蛋白(
p21
、
p53
)及干扰素基因刺激因子(
STING
)通路关键基因(
STING
、
CXCL10
和
MX-1
)和蛋白(STING、cGAS、p-IRF3/IRF3)的表达水平。
结果
2
50 g/L D-gal显著降低心肌细胞活力,增加SA-β-Gal阳性率、细胞凋亡率和细胞内活性氧水平,并上调p16、p21及STING、cGAS、p-IRF3/IRF3通路蛋白表达(
P
<
0.05);200 μmol/L AS-Ⅳ干预后,细胞活力显著增强,SA-β-Gal阳性率下降,细胞内活性氧水平降低,氧化应激损伤减轻,心肌细胞凋亡被抑制,衰老相关
p21
、
p53
的mRNA及蛋白水平下调(
P
<
0.05)。进一步对STING通路相关分子进行检测,qRT-PCR和Western blot结果显示200 μmol /L AS-Ⅳ可抑制D-gal诱导的STING的mRNA和蛋白表达,降低p-IRF3/IRF3的蛋白表达水平。而SA-β-Gal阳性率、细胞内活性氧水平、DNA损伤结果和Western blot结果提示,STING激动剂(STING agonist-7)能够逆转AS-Ⅳ对D-gal诱导的心肌细胞衰老的改善效果。
结论
2
AS-Ⅳ可通过抑制STING通路激活,减轻D-gal诱导的心肌细胞衰老,为心血管衰老相关疾病的防治提供新策略。
Objective
2
To investigate the protective effect of Astragaloside Ⅳ (AS-Ⅳ) on D-galactose (D-gal)-induced cardiomyocytes senescence and its potential mechanisms.
Methods
2
Using H9C2 cardiomyocytes as a model, D-gal was used to induce cardiomyocyte senescence. Cell viability was assessed using the CCK-8 assay, senescenceextent was evaluated via β-galactosidas
e (SA-β-Gal) staining, reactive oxygen species (ROS) levels were measured to assess intracellular oxidative stress, apoptosis extent was determined using the TUNEL assay, and qRT-PCR and Western blot analyses were conducted to examine the expression levels of senescence-related genes and proteins (
p21
、
p53
) and key genes (
STING
,
CXCL10
, and
MX-1
) and proteins (STING, cGAS, p-IRF3/IRF3) of the stimulator of interferon genes (STING) pathway.
Results
2
The 50 g/L D-gal significantly reduced myocardial cell viability, increased SA-β-Gal positivity, apoptosis rate, and intracellular reactive oxygen species levels, and upregulated the expression of p16, p21, and STING, cGAS, p-IRF3/IRF3 pathway proteins (
P
<
0.05); After intervention with 200 μmol/L of AS-Ⅳ, cell viability was significantly enhanced, the SA-β-Gal-positive rate decreased, intracellular reactive oxygen species levels decreased, oxidative stress damage was alleviated, myocardial cell apoptosis was inhibited, and the mRNA and protein levels of aging-related
p21
and
p53
were downregulated (
P
<0.05). Further detection of STING pathway-related molecules showed that 200 μmol/L of AS-IV inhibited D-galactose-induced STING mRNA and protein expression and reduced p-IRF3/IRF3 protein expression levels, as demonstrated by qRT-PCR and Western blot results. However, the SA-β-Gal positivity rate, intracellular reactive oxygen species (ROS) levels, DNA damage results, and Western blot findings suggested that the STING agonist (STING agonist-7) could reverse the ameliorative effects of AS-Ⅳ on D-galactose-induced cardiomyocytes senescence.
Conclusion
2
AS-Ⅳ may mitigate D-gal-induced cardiomyocytes senescence by inhibiting STING pathway activation, providinga new strategy for the prevention and treatment of cardiovascular senescence-related diseases.
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