醫(yī)學(xué)論文范文:ICAM1在實(shí)驗(yàn)性自身免疫性腦脊髓炎發(fā)病機(jī)制中的作用
【摘要】 目的 檢測實(shí)驗(yàn)性自身免疫性腦脊髓炎(EAE)大鼠血腦屏障中血管內(nèi)皮細(xì)胞細(xì)胞間粘附分子1(ICAM1)的表達(dá),并分析其表達(dá)與EAE發(fā)病的關(guān)系。方法 取EAE組和對照組大鼠的腦組織,石蠟切片,免疫組化染色,圖像掃描系統(tǒng)觀測,圖像分析軟件進(jìn)行灰度分析。結(jié)果 EAE組大鼠腦血管內(nèi)皮細(xì)胞上ICAM1的表達(dá)明顯深于對照組。實(shí)驗(yàn)組的灰度值為141.47±6.88,而對照組為166.24±7.24,兩組差異非常顯著(P<0.01)。結(jié)論 大鼠EAE時腦血管內(nèi)皮細(xì)胞ICAM1的表達(dá)上調(diào),提示ICAM1是與EAE發(fā)生相關(guān)的重要粘附分子。
【關(guān)鍵詞】 免疫組織化學(xué)法; ICAM1; 血腦屏障; 實(shí)驗(yàn)性自身免疫性腦脊髓炎
The investigation to the effect of ICAM1 in the nosogenesis of experimental autoimmune encephalomyelitis ZHAO Yapu^,WANG Hong,LIU Huimin,et al.^Bethune Military Medical College,Shijiazhuang 050081,China
【Abstract】 Objective To investigate the relationship between the expression of ICAM1 in the bloodbrain barrier and the experimental autoimmune encephalomyelitis(EAE). Methods Brain of EAE as well as control animals were taken and embedded in paraffin.And the sections were stained by immunohistochemical method. Then the sections were observed by Nikon image scanning system and measured the gray value by IPP image analysis software. Results The expression of ICAM1 in the epithelial cell of endangium of EAE rat's brain was higher than that in control. Conclusion The increase of the expression of ICAM1 in the epithelial cell of endangium of EAE rat's brain indicated that ICAM1 was a necessary adhesion molecule in the developmental process of EAE醫(yī).學(xué).全.在.線m.payment-defi.com.
【Key words】 Immunohistochemical method;Intercellular adhesion molecular1;Bloodbrain barrier;Experimental autoimmune encephalomyelitis
多發(fā)性硬化癥(multiple sclerosis,MS)可能是一種與遺傳、病毒感染、地理環(huán)境等諸多因素有關(guān)的自身免疫性疾病[1]。實(shí)驗(yàn)性自身免疫性腦脊髓炎(experimental autoimmune encephalomyelitis,EAE)與MS在臨床、生化、免疫及病理等諸多方面具有相同的特征,因此成為深入研究MS的理想動物模型。在免疫學(xué)的研究中,粘附分子在EAE發(fā)病中的作用越來越受到關(guān)注。那么,血管內(nèi)皮細(xì)胞細(xì)胞間粘附分子1(intercellular adhesion molecular1,ICAM1)在血腦屏障中的表達(dá)是否與EAE的發(fā)生有關(guān)?本研究采用免疫組化法檢測了ICAM1在血腦屏障中的表達(dá),以探討其與EAE發(fā)病的關(guān)系。
1 材料與方法
1.1 材料
1.1.1 實(shí)驗(yàn)動物及分組 雌性Wistar大鼠50只,8~10周齡,體重(192±10)g,隨機(jī)分為實(shí)驗(yàn)組(免疫抗原組)和對照組(完全弗氏佐劑/百日咳桿菌組)。實(shí)驗(yàn)組注射牛髓鞘堿性蛋白(myelin basic protein,MBP)+完全弗氏佐劑(Freund’s adjuvant complete,CFA)+百日咳桿菌;對照組注射生理鹽水+CFA+百日咳桿菌,每組各25只。
1.1.2 試劑 ICAM1羊抗鼠IgG多抗(Santa Cruz)、SP通用型試劑盒(ZYMED)。