大连医科大学学报
大連醫科大學學報
대련의과대학학보
JOURNAL OF DALIAN MEDICAL UNIVERSITY
2014年
4期
314-317,338
,共5页
2 ,5-己二酮%神经毒性%大鼠骨髓间充质干细胞%凋亡
2 ,5-己二酮%神經毒性%大鼠骨髓間充質榦細胞%凋亡
2 ,5-기이동%신경독성%대서골수간충질간세포%조망
2,5-hexanedione%neurotoxicity%bone marrow mesenchymal stem cells (BMSCs)%apoptosis
目的:研究2,5-己二酮(2,5-HD)对大鼠骨髓间充质干细胞(BMSCs)的凋亡作用及其机制。方法从大鼠骨髓分离、提取和培养大鼠BMSCs ,经形态学观察,流式检测特异细胞标记物表达,成骨、成脂细胞诱导分化,确认其为BMSCs。将BMSCs暴露于10 mmol/L,20 mmol/L,40 mmol/L 2,5-HD,培养24 h,并设立空白对照组。用MTT法观察细胞存活率;用HE染色法观察染毒后细胞形态变化;用Hoechst染色法检测细胞凋亡;用Western Blot检测Bax、Bcl-2蛋白表达水平。结果2,5-HD染毒组BMSCs存活率显著低于对照组(P<0.05)。 HE染色观察显示,染毒BMSCs胞体变小,胞核固缩,突起变短。 Hoechst 染色观察结果表明,染毒BMSCs可见核的固缩及新月形等凋亡特征的核形态变化。 Western Blot结果表明,与对照组比较,染毒组BMSCs的Bax蛋白水平显著升高(P<0.05),Bcl-2蛋白水平显著下降(P<0.05)。结论2,5-HD能诱导大鼠BMSCs凋亡,且其凋亡诱导机制可能与Bax/Bcl-2蛋白的表达紊乱有关。
目的:研究2,5-己二酮(2,5-HD)對大鼠骨髓間充質榦細胞(BMSCs)的凋亡作用及其機製。方法從大鼠骨髓分離、提取和培養大鼠BMSCs ,經形態學觀察,流式檢測特異細胞標記物錶達,成骨、成脂細胞誘導分化,確認其為BMSCs。將BMSCs暴露于10 mmol/L,20 mmol/L,40 mmol/L 2,5-HD,培養24 h,併設立空白對照組。用MTT法觀察細胞存活率;用HE染色法觀察染毒後細胞形態變化;用Hoechst染色法檢測細胞凋亡;用Western Blot檢測Bax、Bcl-2蛋白錶達水平。結果2,5-HD染毒組BMSCs存活率顯著低于對照組(P<0.05)。 HE染色觀察顯示,染毒BMSCs胞體變小,胞覈固縮,突起變短。 Hoechst 染色觀察結果錶明,染毒BMSCs可見覈的固縮及新月形等凋亡特徵的覈形態變化。 Western Blot結果錶明,與對照組比較,染毒組BMSCs的Bax蛋白水平顯著升高(P<0.05),Bcl-2蛋白水平顯著下降(P<0.05)。結論2,5-HD能誘導大鼠BMSCs凋亡,且其凋亡誘導機製可能與Bax/Bcl-2蛋白的錶達紊亂有關。
목적:연구2,5-기이동(2,5-HD)대대서골수간충질간세포(BMSCs)적조망작용급기궤제。방법종대서골수분리、제취화배양대서BMSCs ,경형태학관찰,류식검측특이세포표기물표체,성골、성지세포유도분화,학인기위BMSCs。장BMSCs폭로우10 mmol/L,20 mmol/L,40 mmol/L 2,5-HD,배양24 h,병설립공백대조조。용MTT법관찰세포존활솔;용HE염색법관찰염독후세포형태변화;용Hoechst염색법검측세포조망;용Western Blot검측Bax、Bcl-2단백표체수평。결과2,5-HD염독조BMSCs존활솔현저저우대조조(P<0.05)。 HE염색관찰현시,염독BMSCs포체변소,포핵고축,돌기변단。 Hoechst 염색관찰결과표명,염독BMSCs가견핵적고축급신월형등조망특정적핵형태변화。 Western Blot결과표명,여대조조비교,염독조BMSCs적Bax단백수평현저승고(P<0.05),Bcl-2단백수평현저하강(P<0.05)。결론2,5-HD능유도대서BMSCs조망,차기조망유도궤제가능여Bax/Bcl-2단백적표체문란유관。
Objective To investigate apoptotic effect of 2,5-Hexanedione (2,5-HD) on bone marrow mesenchymal stem cells (BMSCs) of rats and its mechanism.Methods Thecellswere isolated from Bone marrows of rats and cultured . The morphology ofcells were observed , their surface markers were determined by flow cytomerty .Moreover , the cells could be induced tofat cells andosteoblasts .These cells were confirmed to be BMSCs .In this study, the fifth generation of rat BMSCs was exposed to 0, 10, 20 and 40 mmol/L 2,5-HD for 24 h and the cells viability was measured by MTT assay . Themorphological changes of BMSCs were observed using HE staining and The apoptotic morphologic changes of BMSCs were observed by Hoechst 33342 staining.The protein expression of Bcl -2 and Baxwasdetermined by Western blot .Re-sults Our results showed thatexposure to 2,5-HD decreased survival of BMSCs and induced apoptosis .Moreover, 2,5-HD significantly increasedBaxexpression (P<0.05)and significantly decreased Bcl -2 expression(P<0.05).Conclusion These results suggest that 2,5-HD-induced apoptosis of BMSCs may be associated withdisturbanceinBax /Bcl-2 protein expression .