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1.兰州大学:第一临床医学院,甘肃兰州
2.兰州大学:第一医院麻醉科,甘肃兰州
马玉清,E-mail:myq2392466@163.com
收稿:2025-05-15,
修回:2025-09-25,
录用:2025-09-26,
纸质出版:2025-10-30
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谢菁,李若男,高慧慧,等.芍药苷通过调控PI3K/AKT/HIF-1α通路减轻脂多糖诱导的HK-2细胞有氧糖酵解[J].陆军军医大学学报,2025,47(20):2483-2494.DOI:10.16016/j.2097-0927.202505035.
XIE J,LI R N,GAO H H,et al.Paeoniflorin alleviates LPS-induced aerobic glycolysis in HK-2 cells by modulating the PI3K/AKT/HIF-1α pathway[J].J Army Med Univ,2025,47(20):2483-2494.DOI:10.16016/j.2097-0927.202505035.
谢菁,李若男,高慧慧,等.芍药苷通过调控PI3K/AKT/HIF-1α通路减轻脂多糖诱导的HK-2细胞有氧糖酵解[J].陆军军医大学学报,2025,47(20):2483-2494.DOI:10.16016/j.2097-0927.202505035. DOI:
XIE J,LI R N,GAO H H,et al.Paeoniflorin alleviates LPS-induced aerobic glycolysis in HK-2 cells by modulating the PI3K/AKT/HIF-1α pathway[J].J Army Med Univ,2025,47(20):2483-2494.DOI:10.16016/j.2097-0927.202505035. DOI:
目的
2
探讨芍药苷(paeoniflorin,PF)对脂多糖(lipopolysaccharide,LPS)诱导的肾小管上皮细胞(HK-2细胞)有氧糖酵解的影响及其作用机制。
方法
2
本研究分为预实验和正式实验两部分。①预实验:体外培养HK-2细胞,CCK-8实验检测细胞活力,RT-qPCR检测炎症因子mRNA的水平,进行LPS最佳造模浓度筛选、芍药苷毒性实验和浓度筛选。正式实验:将HK-2细胞分成对照组(CON组)、LPS组、LPS+PF组和LPS+PF+740Y-P组。通过建立LPS诱导的SA-AKI肾小管细胞损伤的体外模型,分别给予PF和PI3K激活剂740Y-P干预,造模24 h后取材,CCK-8实验检测细胞活力;细胞外酸化率(extra cellular acidification rate,ECAR)试剂盒检测ECAR;ELISA检测IL-1β、IL-18、乳酸(lactic acid,Lac)以及乳酸脱氢酶A(lactate dehydrogenase A,LDHA);Western blot检测p-PI3K、p-AKT、HIF-1α、丙酮酸激酶2(pyruvate kinase 2,PKM2)、NOD样受体热蛋白结构域相关蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)的表达;免疫荧光观察有氧糖酵解关键酶PKM2的表达和分布情况。
结果
2
①筛选出LPS最佳造模浓度为20.0 μg/mL,芍药苷安全剂量为0~100.0 μmol/L,芍药苷的最佳治疗浓度为25.0 μmol/L。②与CON组相比,LPS组细胞活力明显下降(
P
<
0.05),ECAR明显升高(
P
<
0.05),IL-1β、IL-18、Lac、LDHA水平明显增加(
P
<
0.05),p-PI3K、p-AKT、HIF-1α、p-PKM2、NLRP3蛋白相对表达量明显增加(
P
<
0.05),细胞核内PKM2荧光强度明显增强(
P
<
0.05)。与LPS组相比,LPS+PF组ECAR明显下降(
P
<
0.05),IL-1β、IL-18、Lac、LDHA水平明显下降(
P
<
0.05),p-PI3K、p-AKT、HIF-1α、p-PKM2、NLRP3蛋白相对表达量明显减少(
P
<
0.05),细胞核内PKM2荧光强度明显减弱(
P
<
0.05)。与LPS+PF组相比,LPS+PF+740Y-P组ECAR明显升高(
P
<
0.05),IL-1β、IL-18、Lac、LDHA水平明显增加(
P
<
0.05),p-PI3K、p-AKT、HIF-1α、p-PKM2、NLRP3蛋白相对表达量明显增加(
P
<
0.05),细胞核内PKM2荧光强度明显增强(
P
<
0.05)。
结论
2
芍药苷通过抑制PI3K/AKT/HIF-1α信号通路,降低HK-2细胞有氧糖酵解水平,减轻炎症反应。
Objective
2
To investigate the effects of paeoniflorin (PF) on lipopolysaccharide (LPS)-induced aerobic glycolysis in renal tubular epithelial cell line HK-2 and its underlying mechanism of action.
Methods
2
This study consists of a preliminary experiment and a formal experiment. Preliminary experiment: CCK-8 assay and RT-qPCR were used respectively to measure cell viability and mRNA expression levels of inflammatory factors in HK-2 cells after LPS stimulation to determine the optimal LPS concentration for modeling as well as to evaluate the toxicity of PF and screen for its appropriate concentration. Formal experiment: HK-2 cells were divided into control group (CON group)
LPS group
LPS+PF group and LPS+PF+740Y-P group. LPS was used to establish a cell model of sepsis associated-acute kidney injury (SA-AKI) in HK-2 cells
and then the cell model was treated with PF and PI3K activator 740Y-P
correspondingly for 24 h. CCK-8 assay was employed to detect cell viability
and Extracellular Acidification Rate (ECAR) Kit was utilized to measure the rate. The contents of IL-1β
IL-18
lactic acid (Lac) and lactate dehydrogenase A (LDHA) were determined with ELISA. Western blotting was applied to detect the expression of p-PI3K
p-AKT
HIF-1α
pyruvate kinase 2 (PKM2
a key enzyme in aerobic glycolysis) and NOD-like receptor thermal protein domain associated protein 3 (NLRP3)
and immunofluorescence assay was performed to observe the expression and distribution of PKM2.
Results
2
① Our preliminary experiment identified that the optimal concentration of LPS for modeling was 20.0 μg/mL
a safe dosage range of PF was 0~100.0 μmol/L
and its optimal therapeutic concentration was 25.0 μmol/L. ② Compared with the CON group
LPS stimulation resulted in significantly decreased cell viability (
P
<
0.05)
increased ECAR (
P
<
0.05)
elevated contents of IL-1β
IL-18
Lac and LDHA (
P
<
0.05)
up-regulated protein levels of p-PI3K
p-AKT
HIF-1α
p-PKM2 and NLRP3 (
P
<
0.05)
and enhanced fluorescence intensity of PKM2 in the nucleus of cells (
P
<
0.05). Compared with the model group
PF treatment reversed all above effects induced by LPS stimulation (all
P
<
0.05). Compared with the LPS+PF group
in the LPS+PF+740Y-P group
ECAR was elevated (
P
<
0.05)
the contents of IL-1β
IL-18
Lac and LDHA were increased (
P
<
0.05)
and the relative expression levels of p-PI3K
p-AKT
HIF-1α
p-PKM2 and NLRP3 were increased (
P
<
0.05)
and the fluorescence intensity of PKM2 was strengthened (
P
<
0.05) and enhanced in the nucleus (
P
<
0.05).
Conclusion
2
PF reduces aerobic glycolysis in HK-2 cells and alleviates the inflammatory response by inhibiting the PI3K/AKT/HIF-1α signaling pathway.
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