姜黄素调控miR-142-5p靶向PLEKHA3对肾上腺皮质癌细胞增殖、迁移及凋亡的影响

Regulation of miR-142-5p targeting PLEKHA3 by curcumin and its effects on proliferation,migration and apoptosis of adrenocortical carcinoma cells

目的研究姜黄素调控miR-142-5p靶向Pleckstrin同源域蛋白A家族成员3(PLEKHA3)对肾上腺皮质癌细胞增殖、迁移及凋亡的影响。方法将肾上腺皮质癌细胞分为NC组(细胞正常培养)、NC+60μmol·L^(-1)姜黄素+miR-142-5p组(60μmol·L^(-1)姜黄素处理并转染miR-142-5p mimic)、NC+60μmol·L^(-1)姜黄素+miR-142-5p+PLEKHA3组(60μmol·L^(-1)姜黄素处理并转染miR-142-5p mimic+PLEKHA3)。通过细胞计数试剂盒-8(CCK-8)法和Transwell实验检测细胞增殖和迁移能力,以蛋白质印迹法检测细胞凋亡相关蛋白的表达水平。在动物水平上,建立人肾上腺皮质瘤SW-13细胞裸鼠移植瘤模型,分为对照组和15、30、45、60μmol·L^(-1)姜黄素给药组,验证姜黄素在体内的抗肾上腺皮质癌的作用。结果NC组、NC+60μmol·L^(-1)姜黄素组、NC+60μmol·L^(-1)+miR-142-5p组、NC+60μmol·L^(-1)+miR-142-5p+PLEKHA3组的细胞迁移数目分别为135.76±17.42、37.11±10.08、98.31±14.88和24.39±5.28,细胞凋亡率分别为(3.27±0.11)%、(68.80±4.64)%、(25.47±2.39)%和(78.29±5.47)%,B淋巴细胞瘤2(Bcl-2)蛋白相对表达水平分别为1.00±0.13、0.59±0.11、0.97±0.09、0.31±0.06,Bcl-2相关X蛋白相对表达水平分别为1.00±0.08、1.38±0.11、0.69±0.05和1.93±0.18,NC+60μmol·L^(-1)姜黄素组与NC组相比,在统计学上差异均有统计学意义(P<0.05,P<0.01)。在动物水平上,对照组和15、30、45、60μmol·L^(-1)姜黄素给药组的裸鼠移植瘤体积分别为(1653.02±435.93)、(1148.77±327.18)、(1054.21±286.06)、(996.89±257.62)和(670.64±157.32)mm^(3),移植瘤质量分别为(1.00±0.17)、(0.82±0.09)、(0.76±0.12)、(0.68±0.13)和(0.44±0.11)g,15、30、45、60μmol·L^(-1)姜黄素给药组与对照组比较,在统计学上差异均有统计学意义(P<0.05,P<0.01)。结论姜黄素在体内外均发挥肾上腺皮质癌作用,且可能通过调控miR-142-5p/PLEKHA3信号通路,抑制肾上腺皮质癌细胞的增殖、迁移能力,并促进其凋亡,为肾上腺皮质癌的治疗提供了新的可能靶点。

Objective To investigate the effect of curcumin regulating miR-142-5p targeting pleckstrin homology domain containing family A member 3(PLEKHA3)on proliferation,migration and apoptosis of adrenocortical carcinoma cells.Methods Adrenal cortical cancer cells were divided into NC group(normal culture),NC+60μmol·L^(-1)curcumin(60μmol·L^(-1)curcumin),NC+60μmol·L^(-1)curcumin+miR-142-5p group(60μmol·L^(-1)curcumin and transfected with miR-142-5p mimic),NC+60μmol·L^(-1)curcumin+miR-142-5p+PLEKHA3 group(60μmol·L^(-1)curcumin and transfected with miR-142-5p mimic+PLEKHA3).Cell proliferation and migration abilities were detected by cell counting kit-8(CCK-8)and Transwell assays.Expression levels of apoptosis-related proteins were detected by Western blotting.At the animal level,a nude mouse model of human adrenal cortical tumor SW-13 cell transplantation was established and divided into control group and 15,30,45,60μmol·L^(-1)curcumin groups to verify the anti-adrenal cortical carcinoma effect of curcumin in vivo.Results The cell migration numbers in NC group,NC+60μmol·L^(-1)curcumin group,NC+60μmol·L^(-1)+miR-142-5p group and NC+60μmol·L^(-1)+miR-142-5p+PLEKHA3 group were 135.76±17.42,37.11±10.08,98.31±14.88 and 24.39±5.28;the apoptosis rates were(3.27±0.11)%,(68.80±4.64)%,(25.47±2.39)%and(78.29±5.47)%;the protein expression levels of B-cell lymphoma 2(Bcl-2)were 1.00±0.13,0.59±0.11,0.97±0.09 and 0.31±0.06;the protein expression levels of Bcl-2 associated X protein were1.00±0.08,1.38±0.11,0.69±0.05 and 1.93±0.18;there were statistically significant differences between NC group and NC+60μmol·L^(-1)group(P<0.05,P<0.01).At the animal level,the volumes of the xenograft tumors in control group and 15,30,45 and 60μmol·L^(-1)curcumin groups were(1653.02±435.93),(1148.77±327.18),(1054.21±286.06),(996.89±257.62)and(670.64±157.32)mm^(3);the weights of the xenograft tumors were(1.00±0.17),(0.82±0.09),(0.76±0.12),(0.68±0.13)and(0.44±0.11)g,there were statistically significant differences between 15,30,45 and 60μmol·L^(-1)curcumin groups and control group(P<0.05,P<0.01).Conclusion Curcumin exerts anti-adrenal cortical cancer effects both in vitro and in vivo,may inhibit the proliferation and migration of adrenal cortical cancer cells and promote their apoptosis by regulating the miR-142-5 p/PLEKHA3 signaling pathway.This provides a new potential target for the treatment of adrenal cortical cancer.