解剖学报
解剖學報
해부학보
ACTA ANATOMICA SINICA
2014年
3期
411-415
,共5页
沈凯%林卓明%陈士良%袁国裕%刘晓光
瀋凱%林卓明%陳士良%袁國裕%劉曉光
침개%림탁명%진사량%원국유%류효광
血管紧张素Ⅱ%过氧化氢酶%表型%转化%成纤维细胞%免疫印迹法%大鼠
血管緊張素Ⅱ%過氧化氫酶%錶型%轉化%成纖維細胞%免疫印跡法%大鼠
혈관긴장소Ⅱ%과양화경매%표형%전화%성섬유세포%면역인적법%대서
Angiotensin Ⅱ%Catalase%Phenotype%Transformation%Fibroblast%Western blotting%Rat
目的:探讨血管紧张素Ⅱ( AngⅡ)与血管成纤维细胞( VAF)表型转化的关系。方法利用AngⅡ微泵灌注制备高血压大鼠模型,共18只随机分为未处理组﹑生理盐水对照组﹑AngⅡ灌注组,每组6只。分别检测各组大鼠尾动脉收缩压及血管形态学改变,免疫组织化学检测各组大鼠颈动脉血管过氧化氢酶( CAT)及氧化应激产物4-羟烯酸(4HNE)蛋白的表达,采用Western blotting技术检测外膜成纤维CAT蛋白在不同AngⅡ孵育时间和浓度下的表达。结果与未处理组和生理盐水对照组相比,大鼠颈动脉HE染色和收缩压检测结果显示, AngⅡ灌注组大鼠颈动脉中膜厚度和收缩压明显增加(P<0.01),动脉形态结构有明显改变,且有显著的病理性血管重塑发生;与未处理组比较,免疫组织化学检测显示AngⅡ灌注组大鼠颈动脉血管抗氧化氢酶表达显著降低( P<0.05),而氧化应激产物4HNE表达显著增加(P<0.05),Western blotting检测显示,随着AngⅡ浓度增高和孵育时间延长均能诱导CAT表达下调。结论 AngⅡ能够通过下调血管外膜CAT的表达进而促进血管外膜细胞表型转化,导致动脉的病理性血管重塑。
目的:探討血管緊張素Ⅱ( AngⅡ)與血管成纖維細胞( VAF)錶型轉化的關繫。方法利用AngⅡ微泵灌註製備高血壓大鼠模型,共18隻隨機分為未處理組﹑生理鹽水對照組﹑AngⅡ灌註組,每組6隻。分彆檢測各組大鼠尾動脈收縮壓及血管形態學改變,免疫組織化學檢測各組大鼠頸動脈血管過氧化氫酶( CAT)及氧化應激產物4-羥烯痠(4HNE)蛋白的錶達,採用Western blotting技術檢測外膜成纖維CAT蛋白在不同AngⅡ孵育時間和濃度下的錶達。結果與未處理組和生理鹽水對照組相比,大鼠頸動脈HE染色和收縮壓檢測結果顯示, AngⅡ灌註組大鼠頸動脈中膜厚度和收縮壓明顯增加(P<0.01),動脈形態結構有明顯改變,且有顯著的病理性血管重塑髮生;與未處理組比較,免疫組織化學檢測顯示AngⅡ灌註組大鼠頸動脈血管抗氧化氫酶錶達顯著降低( P<0.05),而氧化應激產物4HNE錶達顯著增加(P<0.05),Western blotting檢測顯示,隨著AngⅡ濃度增高和孵育時間延長均能誘導CAT錶達下調。結論 AngⅡ能夠通過下調血管外膜CAT的錶達進而促進血管外膜細胞錶型轉化,導緻動脈的病理性血管重塑。
목적:탐토혈관긴장소Ⅱ( AngⅡ)여혈관성섬유세포( VAF)표형전화적관계。방법이용AngⅡ미빙관주제비고혈압대서모형,공18지수궤분위미처리조﹑생리염수대조조﹑AngⅡ관주조,매조6지。분별검측각조대서미동맥수축압급혈관형태학개변,면역조직화학검측각조대서경동맥혈관과양화경매( CAT)급양화응격산물4-간희산(4HNE)단백적표체,채용Western blotting기술검측외막성섬유CAT단백재불동AngⅡ부육시간화농도하적표체。결과여미처리조화생리염수대조조상비,대서경동맥HE염색화수축압검측결과현시, AngⅡ관주조대서경동맥중막후도화수축압명현증가(P<0.01),동맥형태결구유명현개변,차유현저적병이성혈관중소발생;여미처리조비교,면역조직화학검측현시AngⅡ관주조대서경동맥혈관항양화경매표체현저강저( P<0.05),이양화응격산물4HNE표체현저증가(P<0.05),Western blotting검측현시,수착AngⅡ농도증고화부육시간연장균능유도CAT표체하조。결론 AngⅡ능구통과하조혈관외막CAT적표체진이촉진혈관외막세포표형전화,도치동맥적병이성혈관중소。
Objective To investigate the relationship between angiotensin Ⅱ ( AngⅡ) and transformation of vascular fibroblasts phenotype .Methods Eighteen rats were randomly assigned into the untreated group , mini-pump infusion of saline group and mini-pump infusion of AngⅡgroup which was used as the hypertension model .Their systolic pressure and vascular morphology were examined .The expression of catalase ( CAT ) and 4HNE was examined by immunohistochemistry .Western blotting was used to examine the expression of CAT of adventitial fibroblasts which were cultured by different incubation times and concentrations of Ang Ⅱ.Results Compared with untreated and mini-pump infusion of saline groups , the systolic pressure and carotid media thickness stained by HE of mini-pump infusion of AngⅡgroup were significantly higher (P<0.01).The results of immunohistochemistry showed that the expression of CAT ofAngⅡgroup was significantly lower than that of untreated group , however the expression of 4HNE of AngⅡgroupwas higher than that of untreated group (P<0.05).Furthermore, the results of Western blotting indicated that the effect of Ang Ⅱ on down-regulation of CAT function was in a dose and incubation time dependent manner .Conclusion AngⅡdown-regulates adventitial CAT expression and promotes fibroblasts phenotypic transformation which leads to pathological arterial vascular remodeling .