HUANG Li-xia,LI xin,ZHANG Shu,et al.Mechanism of Astragaloside IV on diabetic nephropathy induced by Streptozotocin in rats[J]. Beijing Journal of Traditional Chinese Medicine,2023,42(04):403-407.
HUANG Li-xia,LI xin,ZHANG Shu,et al.Mechanism of Astragaloside IV on diabetic nephropathy induced by Streptozotocin in rats[J]. Beijing Journal of Traditional Chinese Medicine,2023,42(04):403-407. DOI: 10.16025/j.1674-1307.2023.04.014.
Mechanism of Astragaloside IV on diabetic nephropathy induced by Streptozotocin in rats
To explore the protective mechanism of astragaloside Ⅳ (AS-IV) through endothelial nitric oxide synthase (eNOS)/nitric oxide(NO) pathway in kidney of diabetic rats.
Methods
2
Thirty SPF male SD rats aged 6 weeks were selected. Except of the control group(n=6), the remaining 24 rats were intraperitoneally injected with 65 mg/kg STZ (dissolved in 0.1 mol/L citric acid buffer, pH 4.4) to make DN model, while the control group was intraperitoneally injected with the same volume of 0.1 mol/L citric acid buffer. The model rats were randomly divided into model group, AS-IV group, insulin (INS) group and AS-IV+INS group with 6 rats in each group. AS-IV 10 mg/kg, INS 5 U and AS-IV 10 mg/kg+INS 5 U were given by gavage respectively, and the control group and the model group were given the same volume of 1% sodium carboxymethyl cellulose solution once a day for 8 weeks. The blood sugar, body weight, urine protein, BUN, Scr, HbA
1
c, nitric oxide (NO) levels in serum and kidney, and the sites of endothelial nitric oxide synthase (eNOS), phosphorylated nitric oxide synthase serine 1 177 [P-Enos (SER 1 177)] and threonine 495 [P-Enos (THR 495)] in kidney were compared.
Results
2
Compared with the control group, the blood sugar in the model group was increased (
P
<
0.05). The blood sugar levels in As-ⅳ group, INS group and As-ⅳ+INS group were lower than those in the model group from the 8th week (
P
<
0.05). However, there was no significant difference in blood glucose among As-ⅳ group, INS group and As-ⅳ+INS group (
P
>
0.05). Compared with the control group, the body weight of the model group was lower (
P
<
0.05), and the urine protein, BUN, Scr and HbA
1
c were higher (
P
<
0.05). Compared with the model group, AS-IV group, INS group and AS-IV+INS group had higher body mass (
P
<
0.05), but lower urine protein, BUN, Scr and HbA
1
c (
P
<
0.05). Compared with INS group, urinary protein and Scr in AS-ⅳ+INS group were lower (
P
<
0.05). Compared with the control group, the level of NO in serum and kidney tissue in the model group was lower (
P
<
0.05). Compared with the model group, AS-IV group, INS group and AS-IV+INS group had higher levels of NO in serum and kidney tissue (
P
<
0.05). Compared with INS group, the level of NO in renal tissue in AS-ⅳ+INS group was higher (
P
<
0.05). Compared with the control group, the expression of p-eNOS(Ser1177) protein in renal tissue of model group was lower (
P
<
0.01). Compared with the model group, the expression of p-eNOS(Ser1177) protein in renal tissue of As-ⅳ group and As-ⅳ+INS group was higher (
P
<
0.01).
Conclusion
2
Astragaloside IV may play a role in treating STZ-induced DN rats through eNOS/NO pathway, and the site of action may be Ser1177.
关键词
糖尿病肾病黄芪甲苷eNOS/NO通路大鼠
Keywords
Diabetic nephropathyAS-IVeNOS/NO passwayrat
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