张林波, 庞紫蕊. 沉默环状RNA_0084043对高糖诱导的人肾小管上皮细胞损伤的影响[J]. 临床肾脏病杂志, 2022, 22(9): 762-768. DOI: 10.3969/j.issn.1671-2390.2022.09.010
    引用本文: 张林波, 庞紫蕊. 沉默环状RNA_0084043对高糖诱导的人肾小管上皮细胞损伤的影响[J]. 临床肾脏病杂志, 2022, 22(9): 762-768. DOI: 10.3969/j.issn.1671-2390.2022.09.010
    Zhang Lin-bo, Pang Zi-rui. Effect of circ_0084043 silence upon human renal tubular epithelial cell injury induced by high glucose[J]. Journal of Clinical Nephrology, 2022, 22(9): 762-768. DOI: 10.3969/j.issn.1671-2390.2022.09.010
    Citation: Zhang Lin-bo, Pang Zi-rui. Effect of circ_0084043 silence upon human renal tubular epithelial cell injury induced by high glucose[J]. Journal of Clinical Nephrology, 2022, 22(9): 762-768. DOI: 10.3969/j.issn.1671-2390.2022.09.010

    沉默环状RNA_0084043对高糖诱导的人肾小管上皮细胞损伤的影响

    Effect of circ_0084043 silence upon human renal tubular epithelial cell injury induced by high glucose

    • 摘要: 目的 探讨沉默环状RNA_0084043(circular RNA_0084 043,circ_0084043)对高糖诱导的人肾小管上皮细胞炎性反应、氧化应激及凋亡的影响及其对微小RNA-142-5p (micro RNA-145-5p,miR-142-5p)的靶向调控作用。方法 肾小管上皮细胞HK-2按照随机数字表法随机分为Con组、HG组、HG+si-NC组、HG+si-circ_0084043组、HG+miR-NC组、HG+miR-142-5p组、HG+si-circ_0084043+anti-miR-NC组、HG+si-circ_0084043+anti-miR-142-5p组;qRT-PCR法检测circ_0084043与miR-142-5p的表达量;ELISA法检测肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素8(interleukin-8,IL-8)的水平;试剂盒检测丙二醛(malondialedhyde,MDA)、超氧化物歧化酶(superoxide dismutase,SOD)的水平;流式细胞术检测细胞凋亡率;双荧光素酶报告基因实验检测circ_0084043与miR-142-5p的靶向关系;Western blot法检测B淋巴细胞瘤-2(B-cell lymphoma-2,Bcl-2)、B淋巴细胞瘤-2相关蛋白(Bcl-2-associated X protein,Bax)蛋白表达量。结果 与Con组比较,HG组circ_0084043的表达水平升高(1.00±0.04)比(3.57±0.49)(P<0.05),miR-142-5p的表达水平降低(1.00±0.05)比(0.34±0.06)(P<0.05),TNF-α、IL-8、MDA的水平升高(18.43±2.06) mg/mL比(49.55±2.65) mg/mL;(11.74±0.83) mg/mL比(27.62±2.25) mg/mL;(0.23±0.08) nmol/mg比(2.86±0.37) nmol/mg(P<0.05),凋亡率(6.74±0.95)%比(23.15±2.49)%与Bax蛋白水平升高(P<0.05),SOD的活性降低(40.05±3.07) U/mg比(17.35±1.54) U/mg(P<0.05),Bcl-2蛋白水平降低(P<0.05);与HG组、HG+si-NC组比较,HG+si-circ_0084043组TNF-α、IL-8、MDA的水平降低(49.55±2.65)/(48.42±4.04) mg/mL比(34.90±4.95) mg/mL;(27.62±2.25)/(27.76±3.53) mg/mL比(19.14±1.02) mg/mL;(2.86±0.37)/(2.81±0.43) nmol/mg比(0.89±0.12) nmol/mg(P<0.05),凋亡率(23.15±2.49)/(23.73±3.28)%比(14.47±0.93)%与Bax蛋白水平降低(P<0.05),SOD的活性(17.35±1.54)/(17.40±0.63) U/mg比(28.54±2.56) U/mg升高(P<0.05),Bcl-2蛋白水平升高(P<0.05);circ_0084043可靶向调控miR-142-5p;与HG+miR-NC组比较,HG+miR-142-5p组TNF-α、IL-8、MDA的水平降低(48.78±4.56) mg/mL比(35.18±3.93) mg/mL;(27.98±1.64) mg/mL比(18.31±1.11) mg/mL;(2.81±0.32) nmol/mg比(0.96±0.08) nmol/mg(P<0.05),凋亡率(22.27±2.68)%比(16.01±0.48)%与Bax蛋白水平降低(P<0.05),SOD的活性升高(17.40±1.09) U/mg比(25.22±1.67) U/mg(P<0.05),Bcl-2蛋白水平升高(P<0.05);与HG+si-circ_0084043+anti-miR-NC组比较,HG+si-circ_0084043+anti-miR-142-5p组TNF-α、IL-8、MDA的水平升高(34.74±1.51) mg/mL比(46.31±2.65) mg/mL;(19.03±0.66) mg/mL比(23.07±1.19) mg/mL;(0.89±0.06) nmol/mg比(1.43±0.11) nmol/mg(P<0.05),凋亡率(14.69±0.49)%比(18.37±0.89)%与Bax蛋白水平升高(P<0.05),SOD的活性降低(28.38±1.03) U/mg比(19.56±0.83) U/mg(P<0.05),Bcl-2蛋白水平降低(P<0.05)。结论 沉默circ_0084043可通过负向调控miR-142-5p而抑制细胞炎性反应、氧化应激及凋亡,从而减轻高糖诱导的人肾小管上皮细胞损伤。

       

      Abstract: Objective To explore the effect of silencing circular RNA_0084043(circ_0084043) on the inflammatory responses, oxidative stress and apoptosis of human renal tubular epithelial cells induced by high glucose and its targeted regulation of miR-142-5p. Methods Renal tubular epithelial cells HK-2 were divided into the groups of Con, HG, HG+si-NC, HG+si-circ_0084043, HG+miR-NC, HG+miR-142-5p, HG+si-circ_0084043+anti-miR-NC and HG+si-circ_0084043+anti-miR-142-5p. Quantitative realtime polymerase chain reaction(qRT-PCR) was utilized for detecting the expression levels of circ_0084043 and miR-142-5p according to the random number table Enzyme-linked immunosorbent assay(ELISA) was utilized for detecting the levels of tumor necrosis factor-alpha(TNF-α) and interleukin-8(IL-8). The levels of malondialedhyde(MDA) and superoxide dismutase(SOD) were detected. Flow cytometry was employed for detecting apoptotic rate. Dual luciferase reporter gene was utilized for detecting the targeting relationship between circ_0084043 and miR-142-5p and Western blot for detecting the expressions of Bcl-2 and Bax protein. Results As compared with Con group, the expression level of circ_0084043 spiked in HG group(1.00±0.04) vs(3.57±0.49)(P<0.05) while the expression level of miR-142-5p declined(1.00±0.05) vs (0.34±0.06) (P<0.05);the levels of TNF-α, IL-8 and MDA(18.43±2.06) vs(49.55±2.65) mg/mL; (11.74±0.83) vs(27.62±2.25) mg/mL; (0.23±0.08) vs(2.86±0.37) nmol/mg(P<0.05), apoptotic rate(6.74±0.95)% vs(23.15±2.49)%and protein level of Bax increased(P<0.05) while activity of SOD decreased(40.05±3.07) vs(17.35±1.54) U/mg (P<0.05) and protein level of Bcl-2 dropped(P<0.05). Compared with HG/HG+si-NC group, the levels of TNF-α, IL-8 and MDA declined in HG+si-circ_0084043 group(49.55±2.65)/(48.42±4.04) vs(34.90±4.95) mg/mL; (27.62±2.25)/(27.76±3.53) vs(19.14±1.02) mg/mL; (2.86±0.37)/(2.81±0.43) vs (0.89±0.12) nmol/mg(P< 0.05) and apoptotic rate(23.15±2.49)/(23.73±3.28)% vs(14.47±0.93)%and protein level of Bax declined(P<0.05) while the activity of SOD(17.35±1.54)/(17.40±0.63) vs(28.54±2.56) U/mg (P<0.05) and protein level of Bcl-2 rose(P<0.05). And circ_0084043 could target miR-142-5p. As compared with HG+miR-NC group, the levels of TNF-α, IL-8 and MDA declined in HG+miR-142-5p group(48.78±4.56) vs(35.18±3.93) mg/mL; (27.98±1.64) vs(18.31±1.11) mg/mL; (2.81±0.32) vs(0.96±0.08) nmol/mg(P<0.05) and apoptotic rate(22.27±2.68)% vs(16.01±0.48)% and protein level of Bax dropped(P<0.05) while activity of SOD(17.40±1.09) vs(25.22±1.67) U/mg(P<0.05) and protein level of Bcl-2 rose(P<0.05). As compared with HG+si-circ_0084043+antimiR-NC group, the levels of TNF-α, IL-8 and MDA rose in HG+si-circ_0084043+anti-miR-142-5p group(34.74±1.51) vs(46.31±2.65) mg/mL; (19.03±0.66) vs(23.07±1.19) mg/mL; (0.89±0.06) vs(1.43±0.11) nmol/mg (P<0.05) and apoptotic rate(14.69±0.49)% vs(18.37±0.89)%and protein level of Bax spiked(P<0.05) while the activity of SOD(28.38±1.03) vs(19.56±0.83) U/mg (P<0.05) and protein level of Bcl-2 declined(P<0.05). Conclusion Silencing circ_0084043 could inhibit cell inflammatory responses, oxidative stress and apoptosis through negatively regulating miR-142-5p, thereby blunting the damage of human renal tubular epithelial cells induced by high glucose.

       

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