国际呼吸杂志
國際呼吸雜誌
국제호흡잡지
INTERNATIONAL JOURNAL OF RESPIRATION
2013年
11期
848-851
,共4页
夏秀琼%雒洪志%袁小玲%郭伟洪%黄宇筠%陈维%林宇鹏
夏秀瓊%雒洪誌%袁小玲%郭偉洪%黃宇筠%陳維%林宇鵬
하수경%락홍지%원소령%곽위홍%황우균%진유%림우붕
低氧血症%肺动脉高压%尾加压素Ⅱ
低氧血癥%肺動脈高壓%尾加壓素Ⅱ
저양혈증%폐동맥고압%미가압소Ⅱ
Hypoxia hypertension%Pulmonary%Urotensin Ⅱ
目的 观察尾加压素Ⅱ(UrotensinⅡ,UⅡ)在低氧性肺动脉高压大鼠肺血管中的表达,探索其在低氧性肺动脉高压形成的作用.方法 将20只雄性SD大鼠随机分为对照组和低氧组,常压低氧3周建立大鼠肺动脉高压模型,以导管法测定平均肺动脉压(mPAP),分离并分别称量大鼠右心室(RV)和左心室加室间隔(LV+S),计算出右心室肥厚指数RV/(LV+S).采用图象分析法测定和计算出肺小动脉管壁厚度指标-管壁厚度占外径的百分比(WT%)和管壁面积占总面积的百分比(WA%),并分别采用原位杂交方法和免疫组织化学染色方法检测大鼠肺小动脉管壁UⅡmRNA和UⅡ的表达水平.结果 ①对照组mPAP为(17.2±2.93) mm Hg,低氧组大鼠为(29.3±2.27) mm Hg,较对照组明显升高(P<0.01).低氧组RV/(LV+S)为(33.18±1.58)%,对照组仅为(22.13±0.95)%,(P<0.01).②对照组肺小动脉厚度指标为[WT%:(12.21±0.78)%;WA%:(44.79±2.16)%],而低氧组则明显升高,分别为[WT%:(25.14±1.85)%;WA%:(74.77±4.52)%](P值均<0.01).③低氧组大鼠肺小动脉UⅡmRNA和UⅡ的染色强度分别为(0.33±0.05),(0.48±0.09),较对照组明显增加(P<0.01).结论 低氧大鼠肺血管UⅡ表达明显增加,其在低氧性肺动脉高压的形成中可能具有重要作用.
目的 觀察尾加壓素Ⅱ(UrotensinⅡ,UⅡ)在低氧性肺動脈高壓大鼠肺血管中的錶達,探索其在低氧性肺動脈高壓形成的作用.方法 將20隻雄性SD大鼠隨機分為對照組和低氧組,常壓低氧3週建立大鼠肺動脈高壓模型,以導管法測定平均肺動脈壓(mPAP),分離併分彆稱量大鼠右心室(RV)和左心室加室間隔(LV+S),計算齣右心室肥厚指數RV/(LV+S).採用圖象分析法測定和計算齣肺小動脈管壁厚度指標-管壁厚度佔外徑的百分比(WT%)和管壁麵積佔總麵積的百分比(WA%),併分彆採用原位雜交方法和免疫組織化學染色方法檢測大鼠肺小動脈管壁UⅡmRNA和UⅡ的錶達水平.結果 ①對照組mPAP為(17.2±2.93) mm Hg,低氧組大鼠為(29.3±2.27) mm Hg,較對照組明顯升高(P<0.01).低氧組RV/(LV+S)為(33.18±1.58)%,對照組僅為(22.13±0.95)%,(P<0.01).②對照組肺小動脈厚度指標為[WT%:(12.21±0.78)%;WA%:(44.79±2.16)%],而低氧組則明顯升高,分彆為[WT%:(25.14±1.85)%;WA%:(74.77±4.52)%](P值均<0.01).③低氧組大鼠肺小動脈UⅡmRNA和UⅡ的染色彊度分彆為(0.33±0.05),(0.48±0.09),較對照組明顯增加(P<0.01).結論 低氧大鼠肺血管UⅡ錶達明顯增加,其在低氧性肺動脈高壓的形成中可能具有重要作用.
목적 관찰미가압소Ⅱ(UrotensinⅡ,UⅡ)재저양성폐동맥고압대서폐혈관중적표체,탐색기재저양성폐동맥고압형성적작용.방법 장20지웅성SD대서수궤분위대조조화저양조,상압저양3주건립대서폐동맥고압모형,이도관법측정평균폐동맥압(mPAP),분리병분별칭량대서우심실(RV)화좌심실가실간격(LV+S),계산출우심실비후지수RV/(LV+S).채용도상분석법측정화계산출폐소동맥관벽후도지표-관벽후도점외경적백분비(WT%)화관벽면적점총면적적백분비(WA%),병분별채용원위잡교방법화면역조직화학염색방법검측대서폐소동맥관벽UⅡmRNA화UⅡ적표체수평.결과 ①대조조mPAP위(17.2±2.93) mm Hg,저양조대서위(29.3±2.27) mm Hg,교대조조명현승고(P<0.01).저양조RV/(LV+S)위(33.18±1.58)%,대조조부위(22.13±0.95)%,(P<0.01).②대조조폐소동맥후도지표위[WT%:(12.21±0.78)%;WA%:(44.79±2.16)%],이저양조칙명현승고,분별위[WT%:(25.14±1.85)%;WA%:(74.77±4.52)%](P치균<0.01).③저양조대서폐소동맥UⅡmRNA화UⅡ적염색강도분별위(0.33±0.05),(0.48±0.09),교대조조명현증가(P<0.01).결론 저양대서폐혈관UⅡ표체명현증가,기재저양성폐동맥고압적형성중가능구유중요작용.
Objective To observe the expression of Ureotensin Ⅱ (U Ⅱ) in hypoxic hypertension rats pneumoangiogram,and its role in hypoxic hypertension.Methods Twenty male Sprague-Drawley rats were randomly allocated into two groups:control group and hypoxic group.The animal model of hypoxic pulmonary hypertension was established by exposing the rats to normobaric hypoxic condition for three weeks.The mean pulmonary pressure(mPAP) was measured by inserting catheter.The right ventricle (RV) and left ventricle plus septum (LV+S) of rat were weighed respectively and the RV/(LV+S) was calculated.The index of wall thickness of rat pulmonary arteriole (WT%)-percentage of the wall thickness in the external diameter and (WA%)-percentage of the wall area in the total vascular area were measured by a computerized image analyzer.The expressing level of BMP4 mRNA in pulmonary artererioles were measured by in-situ hybridization.Results ① In control group the mPAP and RV/(LV +S)were (17.2 ± 2.93) mm Hg and (22.13 ± 0.95) %,in hypoxic group,however,they increased to (29.3±2.27) mm Hg and (33.18±1.58)%(P <0.01 respectively).② In control group the index of wall thickness of rat pulmonary arteriole were [WT%:(12.21 ± 0.78) %,WA%:(44.79 ± 2.16) %],while in hypoxic group they were [WT%:(25.14 ± 1.85) %,WA%:(74.77 ± 4.52) %] (P < 0.01),which raised obviously compared with the control group (P < 0.01).③ The positive degree of U Ⅱ mRNA and U Ⅱ in hypoxic group were (0.33 ± 0.05) and (0.48 ± 0.09) respectively,increased significantly compared with the control group (P < 0.01).Conclusions The expression of U Ⅱ in hypoxic rats pneumoangiogram increased obviously,and U Ⅱ may be important in the hypoxic pulmonary hypertension.