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ID:34219042
大小:10.95 MB
页数:27页
时间:2019-03-04
《cyclind1在中耳胆脂瘤中的表达及意义》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、CyclinDl在中耳胆脂瘤中的表达及意义摘要目的:CyclinDl基因于1991年被发现,在许多人类恶性肿瘤中有高表达,其表达失控可能引起细胞增殖异常而产生肿瘤,近来也有在良性病变中的研究。CyclinDl是-700G1期核蛋白,目前认为它是细胞增殖过程中意义最大的细胞周期蛋白。本文研究CyclinDl在中耳胆脂瘤中的表达情况,探讨其在胆脂瘤发病机制中的作用。方法:取胆脂瘤型中耳炎手术标本蜡块30例,用正常耳后皮肤标本蜡块15例作为对照,采用免疫组织化学技术PV一6000二步法检测CyclinDl在30例
2、中耳胆脂瘤组织及15例正常耳后皮肤中的表达情况,并进行统计学分析。结果:CyclinDl阳性表达为细胞核出现棕黄色颗粒,CyclinDl阳性表达主要分布于胆脂瘤上皮和正常耳后皮肤的棘层、颗粒层,基底细胞层也可见少量表达。CyclinDl在中耳胆脂瘤上皮中的阳性率为70.0%,在正常耳后皮肤中的阳性率为26.7%,两者比较差异具有统计学意义(X2=5.951,p(O.05)。结论:CyclinDl在胆脂瘤上皮中的过表达反映了胆脂瘤上皮处于高度增殖的状态,可能参与了胆脂瘤上皮过度增殖机制的调控,说明中耳胆脂瘤上
3、皮细胞存在很强的增殖能力。CyclinDl可能在中耳胆脂瘤的发生、发展中起重要作用。关键词:CyclinDl;胆脂瘤;中耳;免疫组化ExpressionandSignificanceofCyclinDlinMiddleEarCholesteatomaAbstractObjective:CyclinD1genewasfoundin1991.whichhasbeenoverexpressedinanumberofhumanmalignanttumors,itsoverexpressionoutofcontron
4、lmaycausecellproliferationabnormal,resultingintumors.Therearealsosomestudiesinbenignlesionrecently.CyclinD1isaG1ribonucleoprotein,whichisregardedasthelargestsignificantcellcycleproteinduringcellproliferation.ThepaperresearchtheexpressionofcyclinD1proteinan
5、dinvestigateitsroleintheoccurrenceanddevelopmentinmiddleearcholesteatoma.Method:Bycontrastingwiththefollowingtwocasesusingimmunohistochemicaltechnology(PV一6000),westudiedtheexpressionofcyclinD1in30casesofmiddleearcholesteatomatissuesand15casesofnormalauric
6、leskinandstatisticallyanalyzed.Result:cyclinD1whosepositiveexpressionistakingonbuffygrainsincellnucleusanddistributingpricklecelllayerandgranularlayerthroughoutthemiddleearcholesteatomaepitheliumandauricleskin,besides,thereareafewexpressionsinbasalcelllaye
7、r.ThepositiveexpressionrateofCyclinD1proteininthemiddleearcholesteatomatissueswas70.0%andinnormalauricleskinwas26.7%,andtherewassignificantdifferencebetweenthetwogroups(X2=5.951,p<0.05).Conclusion:TheoverexpressionofcyclinD1reflectsthehyperproliferativenat
8、ureofcholesteatomaepithelium,participatesitscontrolandshowsthattherearegreatlyreproductiveactivityinmiddleearcholesteatoma.CyclinD1mayplayanimportantroleintheformationanddevelopmentofmiddleearcholesteatoma.Ke
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