1.河北中医药大学 研究生学院,石家庄 050200
2.河北省中医院,石家庄 050000
3.河北医科大学 第一医院,石家庄 050000
李睿嘉,在读博士,医师,从事中西医结合肾脏病的防治研究,E-mail:liliuyou1995@163.com
郭登洲,博士,主任医师,从事中西医结合肾脏病的防治研究,E-mail:hbguodengzhou@163.com
收稿:2025-11-26,
修回:2025-12-21,
录用:2026-01-04,
网络首发:2026-01-09,
纸质出版:2026-03-20
移动端阅览
李睿嘉,王子轩,郭世龙等.基于SIRT1/HIF-1α/VLDLr信号通路探讨当归芍药散改善db/db小鼠肾小球硬化的作用机制[J].中国实验方剂学杂志,2026,32(06):11-18.
LI Ruijia,WANG Zixuan,GUO Shilong,et al.Mechanism of Danggui Shaoyaosan in Improving Glomerulosclerosis in db/db Mice via SIRT1/HIF-1α/VLDLr Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2026,32(06):11-18.
李睿嘉,王子轩,郭世龙等.基于SIRT1/HIF-1α/VLDLr信号通路探讨当归芍药散改善db/db小鼠肾小球硬化的作用机制[J].中国实验方剂学杂志,2026,32(06):11-18. DOI: 10.13422/j.cnki.syfjx.20260115.
LI Ruijia,WANG Zixuan,GUO Shilong,et al.Mechanism of Danggui Shaoyaosan in Improving Glomerulosclerosis in db/db Mice via SIRT1/HIF-1α/VLDLr Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2026,32(06):11-18. DOI: 10.13422/j.cnki.syfjx.20260115.
目的
2
探讨当归芍药散(DSS)改善db/db小鼠肾损伤的可能作用机制。
方法
2
8周龄的SPF级雄性db/db小鼠30只、db/m小鼠6只,适应性喂养1周后,每周检测db/db小鼠、db/m小鼠尿微量白蛋白及血糖,以db/db小鼠尿中微量蛋白尿含量显著高于db/m小鼠,且空腹血糖≥16.7 mmol·L
-1
判定为模型成功,随机将30只db/db小鼠随机分为模型组,厄贝沙坦(IBN)组,DSS低、中、高剂量组(16.77、33.54、67.08 g·kg
-1
),6只db/m小鼠作为正常组。IBN组给予IBN 0.025 g·kg
-1
·d
-1
灌胃,DSS低、中、高剂量组分别给予DSS 16.77、33.54、67.08 g·kg
-1
·d
-1
灌胃,正常组及模型组给予等体积生理盐水灌胃,均连续灌胃8周。干预结束后,检测血肌酐(SCr)、尿素氮(BUN)、尿总蛋白(UTP)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)评价药物作用效果,并采用苏木素-伊红(HE)染色观察肾脏组织病理学变化,蛋白免疫印迹法(Western blot)检测沉默信息调节因子1(SIRT1)、缺氧诱导因子-1
α
(HIF-1
α
)、极低密度脂蛋白受体(VLDLr)、分化簇31(CD31)蛋白表达,实时荧光定量聚合酶链式反应(Real-time PCR)检测HIF-1
α
、VLDLr mRNA水平,免疫组化法观察HIF-1
α
及胱天蛋白酶-3(Caspase-3)的表达及分布。
结果
2
与正常组比较,模型组小鼠SCr、BUN、UTP、TG、LDL-C明显升高;HE染色可见肾小球硬化,系膜基质增生,毛细血管袢扭曲、增厚,并存在大量炎症细胞浸润;SIRT1、CD31蛋白表达明显降低(
P
<
0.05),HIF-1
α
、VLDLr蛋白及mRNA水平明显上升(
P
<
0.05),免疫组化可见HIF-1
α
、Caspase-3表达明显增多(
P
<
0.05),提示肾脏细胞缺氧、凋亡。与模型组比较,各给药组SCr、BUN、TG、LDL-C明显下降(
P
<
0.05),DSS中剂量组UTP明显改善(
P
<
0.05);肾组织结构及形态改善,炎症细胞减少,血管未见透明变性,SIRT1、CD31蛋白表达明显提升(
P
<
0.05),HIF-1
α
、VLDLr蛋白及mRNA水平下降(
P
<
0.05),免疫组化提示各给药组HIF-1
α
、Caspase-3表达明显减少(
P
<
0.05),其中IBN组及DSS中剂量组改善趋势最为明显(
P
<
0.05)。
结论
2
DSS可以有效改善db/db小鼠肾小球硬化及脂质沉积,其机制可能与SIRT1/HIF-1
α
/VLDLr信号通路有关。
Objective
2
To investigate the potential mechanism of Danggui Shaoyaosan (DSS) in ameliorating renal injury in db/db mice.
Methods
2
Thirty 8-week-old specific pathogen-free (SPF)-grade male db/db mice and six db/m mice were acclimated for one week. Urinary microalbumin and blood glucose levels were measured weekly in both db/db and db/m mice. Successful modeling was determined by significantly higher microalbuminuria in db/db mice compared to db/m mice and a fasting blood glucose ≥16.7 mmol·L
-1
. The 30 db/db mice were randomly divided into five groups: the model group, the irbesartan (IBN) group, and three DSS dose groups (low-, medium-, and high-dose DSS groups, administered at 16.77, 33.54, 67.08 g·kg
-1
·d
-1
, respectively). Additionally, the six db/m mice served as the normal control group. The IBN group received irbesartan at 0.025 g·kg
-1
·d
-1
by gavage, while the three DSS groups received DSS at 16.77, 33.54, and 67.08 g·kg
-1
·d
-1
by gavage, respectively. The normal and model groups were administered with an equivalent volume of normal saline by gavage. All interventions lasted for 8 consecutive weeks. After intervention, serum creatinine (SCr), blood urea nitrogen (BUN), urinary total protein (UTP), triglyceride (TG), and low-density lipoprotein cholesterol (LDL-C) were measured to evaluate the therapeutic efficacy of the treatments. Renal histopathological changes were observed with hematoxylin-eosin (HE) staining. Western blot was used to detect the protein expression of silencing information regulator 1 (SIRT1), hypoxia-inducible factor-1
α
(HIF-1
α
), very low-density lipoprotein receptor (VLDLr), and cluster of differentiation 31 (CD31). Real-time fluorescence quantitative polymerase chain
reaction (Real-time PCR) was used to detect the mRNA levels of HIF-1
α
and VLDLr. Immunohistochemistry was used to observe the expression and distribution of HIF-1
α
and Caspase-3.
Results
2
Compared to the normal group, the model group showed significantly increased SCr, BUN, UTP, TG, and LDL-C. HE staining revealed glomerulosclerosis, mesangial matrix hyperplasia, capillary loop distortion and thickening, with extensive inflammatory cell infiltration. Protein expression of SIRT1 and CD31 significantly decreased (
P
<
0.05), while HIF-1
α
and VLDLr protein and mRNA levels increased (
P
<
0.05). Immunohistochemistry showed increased expression of HIF-1
α
and Caspase-3 (
P
<
0.05), indicating hypoxia and apoptosis in renal cells. In all treatment groups, SCr, BUN, TG, and LDL-C were significantly reduced compared to the model group (
P
<
0.05), and UTP was significantly improved in the medium-dose DSS group (
P
<
0.05). Renal tissue structure and morphology were improved, inflammatory cells were reduced, and no vascular hyaline degeneration was observed. SIRT1 and CD31 protein expression was elevated to varying degrees compared to the model group (
P
<
0.05), while HIF-1
α
and VLDLr protein and mRNA levels decreased (
P
<
0.05). Immunohistochemistry showed reduced expression of HIF-1
α
and Caspase-3 in all treatment groups (
P
<
0.05), with the most significant improvement observed in the IBN group and medium-dose DSS group (
P
<
0.05).
Conclusion
2
DSS can effectively ameliorate glomerulosclerosis and lipid deposition in db/db mice, and its mechanism may involve the SIRT1/HIF-1
α
/VLDLr signaling pathway.
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