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1.北京航天总医院,北京 100007;
2.北京中医药大学,北京 100029
王颖超,硕士,主治医师,从事中医内科学研究,Tel: 010-63472524,E-mail: wangyingchaobear@sina.com
李玲,硕士,副主任医师,从事中医内科学研究,Tel:010-63472524,E-mail: yj_zhi@126.com
收稿日期:2018-07-04,
网络出版日期:2018-11-05,
纸质出版日期:2019-03-05
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王颖超, 赵敬, 赵宗江, 等. 糖肾平胶囊通过PI3K/Akt信号通路干预高糖+LPS诱导足细胞凋亡的机制[J]. 中国实验方剂学杂志, 2019,25(5):105-111.
Ying-chao WANG, Jing ZHAO, Zong-jiang ZHAO, et al. Molecular Mechanism of Tangshenping Capsule in Intervening Apoptosis of Podocytes Induced by High Glucose+LPS Through PI3K/Akt Signaling Pathway[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(5): 105-111.
王颖超, 赵敬, 赵宗江, 等. 糖肾平胶囊通过PI3K/Akt信号通路干预高糖+LPS诱导足细胞凋亡的机制[J]. 中国实验方剂学杂志, 2019,25(5):105-111. DOI: 10.13422/j.cnki.syfjx.20190421.
Ying-chao WANG, Jing ZHAO, Zong-jiang ZHAO, et al. Molecular Mechanism of Tangshenping Capsule in Intervening Apoptosis of Podocytes Induced by High Glucose+LPS Through PI3K/Akt Signaling Pathway[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(5): 105-111. DOI: 10.13422/j.cnki.syfjx.20190421.
目的:
2
观察糖肾平对高糖环境下脂多糖(LPS)对足细胞凋亡的影响,并探讨其作用机制。
方法:
2
利用雄性Wistar大鼠,分别用糖肾平小、中、大剂量(0.525
1.05
2.1g·kg
-1
),厄贝沙坦(17.5mg·kg
-1
)灌胃给药,制备相应药物血清。采用高糖,LPS体外刺激大鼠足细胞建立模型。并分为正常组(5%正常大鼠血清),高糖组(5%模型大鼠血清+4.5‰葡萄糖),高糖+LPS组(5%模型大鼠血清+4.5‰葡萄糖+LPS 1mg·L
-1
),厄贝沙坦组(5%厄贝沙坦组大鼠血清+4.5‰葡萄糖+LPS 1mg·L
-1
),糖肾平小剂量组(5%糖肾平小剂量大鼠血清+4.5‰葡萄糖+LPS 1mg·L
-1
),中剂量组(5%糖肾平中剂量大鼠血清+4.5‰葡萄糖+LPS 1mg·L
-1
),大剂量组(5%糖肾平大剂量大鼠血清+4.5‰葡萄糖+LPS 1mg·L
-1
)。采用蛋白免疫印迹法(Western blot)及逆转录聚合酶链式反应(RT-PCR)检测足细胞中CD2相关蛋白(CD2AP),nephrin和磷脂酰肌醇3激酶/蛋白激酶B(PI3K/Akt)信号转导通路中关键因子的蛋白和mRNA的表达水平。
结果:
2
与正常组比较,高糖组和高糖+LPS组足细胞nephrin
CD2AP
PI3K
Akt蛋白及mRNA表达明显减少(
P
<
0.05,
P
<
0.01);B淋巴细胞瘤-2相关凋亡蛋白(Bad蛋白)及mRNA表达明显增加(
P
<
0.05,
P
<
0.01)。与高糖+LPS组比较,厄贝沙坦组足细胞CD2AP
PI3K
Akt蛋白及mRNA表达明显增加(
P
<
0.05,
P
<
0.01);nephrin mRNA表达增加;Bad蛋白及mRNA蛋白表达减少。糖肾平各组足细胞CD2AP
PI3K
Akt蛋白及mRNA表达明显增加(
P
<
0.05,
P
<
0.01);Bad蛋白及mRNA蛋白表达减少(
P
<
0.05,
P
<
0.01)。
结论:
2
糖肾平维持足细胞裂孔隔膜蛋白稳定表达,保护肾小球滤过屏障,同时进一步激活PI3K/Akt信号通路,抑制足细胞凋亡;是其多靶点防治糖尿病肾病的作用机制之一。
Objective:
2
To observe effect of Tangshenping capsule on lipopolysaccharide (LPS)-stimulated podocytes apoptosis under high glucose conditions of podocyte in rats with diabetic nephropathy (DN)
and discuss possible mechanism.
Method:
2
With cultured rat podocytes as object of study
the podocytes model was established with high glucose and LPS
and divided into 7 groups: control group
high glucose group
high glucose plus LPS group
irbesartan group
and low
moderate and high-dose Tangshenping capsule groups.Protein and mRNA expressions of CD2-associated protein (CD2AP)
nephrin
phosphatidylinositol 3-kinase (PI3K)
protein kinase B (Akt) and B-cell lymphoma-2 associated death protein (Bad protein) of podocyte in each group were detected by Western blot and reverse transcription polymerase chain reaction (RT-PCR).
Result:
2
Compared with control group
the protein and mRNA expressions of podocyte CD2AP
nephrin
PI3K
Akt decreased definitely (
P
<
0.05
P
<
0.01)
while Bad protein and mRNA expressions increased definitely (
P
<
0.05
P
<
0.01). Compared with high glucose plus LPS group
the protein and mRNA expressions of podocyte CD2AP
PI3K
Akt increased definitely (
P
<
0.05
P
<
0.01)
whereas Bad protein and mRNA expressions decreased definitely (
P
<
0.05
P
<
0.01) in irbesartan group. The protein and mRNA expressions of podocyte nephrin
CD2AP
PI3K
Akt increased definitely (
P
<
0.05
P
<
0.01)
and Bad protein and mRNA expressions decreased definitely (
P
<
0.05
P
<
0.01) in three Tangshenping capsule groups.
Conclusion:
2
Tangshenping capsule can maintain a stable protein expression of Slit diaphragm (SD) in podocyte
inhibit podocyte apoptosis by activating PI3K/Akt signaling pathway. This is one of mechanisms for preventing and treating diabetic nephropathy.
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