广东医学
廣東醫學
엄동의학
GUNAGDONG MEDICAL JOURNAL
2014年
8期
1149-1153
,共5页
肝肿瘤%人着色性干皮病D组基因%转染%P53基因%原癌基因蛋白质Ets-1
肝腫瘤%人著色性榦皮病D組基因%轉染%P53基因%原癌基因蛋白質Ets-1
간종류%인착색성간피병D조기인%전염%P53기인%원암기인단백질Ets-1
liver neoplasms%xeroderma pigmentosum group D gene%transfection%P53 gene%proto-oncogene protein Ets-1
目的:探讨人剪切修复基因XPD对肝癌细胞P53和Ets-1基因的影响。方法使用脂质体瞬时转染技术,将pEGFP-N2-XPD重组质粒转染至肝癌细胞HepG2,24 h后加入20μmol/L的P53抑制剂Pifithrin-α,孵育24 h,并以未经转染的HepG2细胞作为空白对照。 RT-PCR、Western blot 检测细胞中XPD、P53、phospho -P53(ser-15)、Ets-1的mRNA和蛋白的表达变化,MTT法观察细胞增殖的活力,流式细胞仪检测细胞周期变化。结果与空白对照比较,转染pEGFP-N2-XPD重组质粒后,HepG2细胞XPD、P53 mRNA和蛋白表达上调( P<0.01),而Ets-1 mRNA和蛋白表达下调(P<0.01),加入Pifithrin-α后,XPD、P53 mRNA和蛋白表达下调,Ets-1 mRNA和蛋白表达上调( P<0.01)。转染pEGFP-N2-XPD重组质粒后,HepG2细胞进入S期发生阻滞,停滞在G1期(P<0.01),加入Pifithrin-α后,HepG2细胞G1期细胞减少,S期细胞增多(P<0.01)。转染pEGFP-N2-XPD重组质粒后,HepG2细胞增殖活力下降( P<0.01),加入Pifithrin-α后, HepG2细胞增殖活力上升( P<0.01)。结论野生型XPD基因在转染至肝癌HepG2细胞后,可以上调P53的表达,通过P53途径抑制Ets-1的表达,促使肝癌细胞凋亡。
目的:探討人剪切脩複基因XPD對肝癌細胞P53和Ets-1基因的影響。方法使用脂質體瞬時轉染技術,將pEGFP-N2-XPD重組質粒轉染至肝癌細胞HepG2,24 h後加入20μmol/L的P53抑製劑Pifithrin-α,孵育24 h,併以未經轉染的HepG2細胞作為空白對照。 RT-PCR、Western blot 檢測細胞中XPD、P53、phospho -P53(ser-15)、Ets-1的mRNA和蛋白的錶達變化,MTT法觀察細胞增殖的活力,流式細胞儀檢測細胞週期變化。結果與空白對照比較,轉染pEGFP-N2-XPD重組質粒後,HepG2細胞XPD、P53 mRNA和蛋白錶達上調( P<0.01),而Ets-1 mRNA和蛋白錶達下調(P<0.01),加入Pifithrin-α後,XPD、P53 mRNA和蛋白錶達下調,Ets-1 mRNA和蛋白錶達上調( P<0.01)。轉染pEGFP-N2-XPD重組質粒後,HepG2細胞進入S期髮生阻滯,停滯在G1期(P<0.01),加入Pifithrin-α後,HepG2細胞G1期細胞減少,S期細胞增多(P<0.01)。轉染pEGFP-N2-XPD重組質粒後,HepG2細胞增殖活力下降( P<0.01),加入Pifithrin-α後, HepG2細胞增殖活力上升( P<0.01)。結論野生型XPD基因在轉染至肝癌HepG2細胞後,可以上調P53的錶達,通過P53途徑抑製Ets-1的錶達,促使肝癌細胞凋亡。
목적:탐토인전절수복기인XPD대간암세포P53화Ets-1기인적영향。방법사용지질체순시전염기술,장pEGFP-N2-XPD중조질립전염지간암세포HepG2,24 h후가입20μmol/L적P53억제제Pifithrin-α,부육24 h,병이미경전염적HepG2세포작위공백대조。 RT-PCR、Western blot 검측세포중XPD、P53、phospho -P53(ser-15)、Ets-1적mRNA화단백적표체변화,MTT법관찰세포증식적활력,류식세포의검측세포주기변화。결과여공백대조비교,전염pEGFP-N2-XPD중조질립후,HepG2세포XPD、P53 mRNA화단백표체상조( P<0.01),이Ets-1 mRNA화단백표체하조(P<0.01),가입Pifithrin-α후,XPD、P53 mRNA화단백표체하조,Ets-1 mRNA화단백표체상조( P<0.01)。전염pEGFP-N2-XPD중조질립후,HepG2세포진입S기발생조체,정체재G1기(P<0.01),가입Pifithrin-α후,HepG2세포G1기세포감소,S기세포증다(P<0.01)。전염pEGFP-N2-XPD중조질립후,HepG2세포증식활력하강( P<0.01),가입Pifithrin-α후, HepG2세포증식활력상승( P<0.01)。결론야생형XPD기인재전염지간암HepG2세포후,가이상조P53적표체,통과P53도경억제Ets-1적표체,촉사간암세포조망。
Objective To investigate the effects of xeroderma pigmentosum D ( XPD) on the growth of hepatoma cells and the expressions of P53 and Ets-1.Methods Human hepatoma cells (HepG2) were transfected with the plas-mids of pEGFP-N2-XPD using Lipofectamine 2000, and subsequently incubated with 20μmol/L Pifithrin-α( P53 in-hibitor) for 24 h.Blank control group (no transfecting and adding medicine ) was set.The expressions of XPD, P53, phospho-P53 (ser-15) and Ets-1 were assessed by RT-PCR and Western blot.Flow cytometry was used to examine the cell cycle and apoptosis .MTT assay was used to detect the cell proliferation .Results After transfected with the pEG-FP-N2-XPD plasmid, the mRNA and protein expression of XPD and P53 were significantly up -regulated, while the expression of Ets-1 was significantly down -regulated (P<0.01).Moreover, the cell proliferation was inhibited and the apoptosis was accelerated with pEGFP -N2-XPD plasmid transfected , which was reversed by Pifithrin -α.Conclusion Wild-XPD gene can restrain the proliferation, down -regulate Ets -1 via P53 pathway, and impel the apoptosis ofhepatoma cells.