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《亚砷酸钠对nit-1细胞增殖及胰岛素基因表达的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第28卷第4期石河子大学学报(自然科学版)Vo1.28NO.42010年8月JournalofShiheziUniversity(NaturalScience)Aug.2010文章编号:1007—7383(2010)04—0457—04亚砷酸钠对NIT_1细胞增殖及胰岛素基因表达的影响王瑞,张冰荫,李莉,李媛嫒,杨元元,慕晓玲(石河子大学医学院/新疆地方与民族高发病重点实验室,石河子832002)摘要:为了观察亚砷酸钠(NaAsO)对胰岛p细胞NIT-1增殖及胰岛素(Insulin)基因表达的影响,本实验使用不同浓度的NaAsOz(1,2,4,8,16和32~mo
2、l/I)分别不同时间(24h和48h)作用于NIT一1细胞,以MTT法检测细胞的增殖活性,RTPCR方法检测InsulinmRNA的表达。结果显示:1)NaAsO。对NIT一1细胞增殖活性的影响:当NaAs()浓度小于2/lmol/I的时候轻度促进NYI1细胞增殖(P>O.05)。当NaAsOz浓度大于4ptmol/L时抑制细胞增殖(P3、低,其中8mol/I组与对照组比差异有统计学意义;作用48h,各剂量组InsulinmRNA表达降低,其中4mol/I组和8/~mol/I组与对照组比差异有统计学意义。由此可得出砷对NIT1细胞增殖及Insulin基因表达的影响与作用时间、剂量有关,InsulinmRNA表达水平的改变可能是砷影响胰岛B细胞功能进而引发糖尿病的机制之一。关键词:砷;NIT一1细胞;胰岛素基因;糖尿病中图分类号:R329.1文献标识码:ATheEffectofNaAsO2onProliferationandInsulinmRNAExpression0fNIT一1InsulinomaC4、ellsWANGRui,ZHANGBingyin,LILi,LIYuanyuan,YANGYuanyuan,MUXiaoling(MedicineCollege,ShiheziUniversity/KeyLaboratoryofXinjiangEndemicandEthnicDiseases,Shihezi832002,China)Abstract:ToinvestigatetheeffectsofNaAs02onproliferationandinsulinmRNAexpressionofNIT-1insulinomacells(pancreaticislet15、3-cells),NIT-1cellswereculturedwithNaAs()2(1,2,4,8,16and32#mol/Lrespectively).NIT1cellswereincubatedfor24and48h,andthenthevabilityweredeterminedbyMTT.Meanwhile,thelevelsofinsulinmRNAexpressionweredetectedbyRT-PCRmethod.Theresultsdisplay:1)TheproliferationofNIT-1in—sulinomacells:Thepro6、liferationofNIT-1insulinomacellswasslightlypromotedbyNaAsOzwhenitsconcentra—tionwasin0-2/~mol/I(P>0.05).However.theproliferationofNIT-1insulinomacellswasinhibitedbydegreesintime-andclosedependantmannerastheconcentrationofNaAs()2washigherthan4/~mol/L(P<0.01).2)InsulinmRNAexpressionofNI7、T-1insulinomacellswereevaluatedinthepresenceof1。4and8ttmol/INaAsO2for24hand48h:NaAsOzdecreasedinsulinmRNAexpressioninallgroups.WealsoshowedasignificantdecreaseininsulinmRNAexpressionofcellsexposedto8/lmol/INaAsOzduring24handexposedto4or8#mol/INaAsO2during48h.Ourdatasuggestthatactingon8、theti
3、低,其中8mol/I组与对照组比差异有统计学意义;作用48h,各剂量组InsulinmRNA表达降低,其中4mol/I组和8/~mol/I组与对照组比差异有统计学意义。由此可得出砷对NIT1细胞增殖及Insulin基因表达的影响与作用时间、剂量有关,InsulinmRNA表达水平的改变可能是砷影响胰岛B细胞功能进而引发糖尿病的机制之一。关键词:砷;NIT一1细胞;胰岛素基因;糖尿病中图分类号:R329.1文献标识码:ATheEffectofNaAsO2onProliferationandInsulinmRNAExpression0fNIT一1InsulinomaC
4、ellsWANGRui,ZHANGBingyin,LILi,LIYuanyuan,YANGYuanyuan,MUXiaoling(MedicineCollege,ShiheziUniversity/KeyLaboratoryofXinjiangEndemicandEthnicDiseases,Shihezi832002,China)Abstract:ToinvestigatetheeffectsofNaAs02onproliferationandinsulinmRNAexpressionofNIT-1insulinomacells(pancreaticislet1
5、3-cells),NIT-1cellswereculturedwithNaAs()2(1,2,4,8,16and32#mol/Lrespectively).NIT1cellswereincubatedfor24and48h,andthenthevabilityweredeterminedbyMTT.Meanwhile,thelevelsofinsulinmRNAexpressionweredetectedbyRT-PCRmethod.Theresultsdisplay:1)TheproliferationofNIT-1in—sulinomacells:Thepro
6、liferationofNIT-1insulinomacellswasslightlypromotedbyNaAsOzwhenitsconcentra—tionwasin0-2/~mol/I(P>0.05).However.theproliferationofNIT-1insulinomacellswasinhibitedbydegreesintime-andclosedependantmannerastheconcentrationofNaAs()2washigherthan4/~mol/L(P<0.01).2)InsulinmRNAexpressionofNI
7、T-1insulinomacellswereevaluatedinthepresenceof1。4and8ttmol/INaAsO2for24hand48h:NaAsOzdecreasedinsulinmRNAexpressioninallgroups.WealsoshowedasignificantdecreaseininsulinmRNAexpressionofcellsexposedto8/lmol/INaAsOzduring24handexposedto4or8#mol/INaAsO2during48h.Ourdatasuggestthatactingon
8、theti
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