中华器官移植杂志
中華器官移植雜誌
중화기관이식잡지
CHINESE JOURNAL OF ORGAN TRANSPLANTATION
2012年
10期
624-628
,共5页
林杰%何飞%吴林熹%黄汉飞%曾仲
林傑%何飛%吳林熹%黃漢飛%曾仲
림걸%하비%오림희%황한비%증중
肝移植%再灌注损伤%缺血后处理%线粒体
肝移植%再灌註損傷%缺血後處理%線粒體
간이식%재관주손상%결혈후처리%선립체
Liver transplantation%Reperfusion injury%Ischemic postconditioning%mitochondria
目的 研究缺血后处理(IPO)减轻大鼠肝脏缺血再灌注损伤(IRI)的机制中关于线粒体途径发挥的作用.方法 按随机数字表法将SD大鼠分为3组,IRI组和IPO组建立肝移植模型,IRI组受鼠在供肝植入后,立即开放门静脉恢复血液供应 ;IPO组受鼠在门静脉完全开放前行IPO,即对门静脉行开放60 s、夹闭60 s,共重复6次.假手术组大鼠在开腹后仅游离肝周韧带,未进行肝移植.术后6 h(IRI组和IPO组为血流完全开放后6h,下同),取各组受鼠的血液和肝组织样本,检测肝功能,采用逆转录聚合酶链反应法检测肝组织B淋巴细胞因子-2(Bcl-2)mRNA和Bcl-2共存蛋白质(Bax) mRNA的表达,采用蛋白质印迹法检测肝组织细胞色素C(Cyt-c)蛋白的表达,使用流式细胞仪检测肝组织的细胞凋亡与坏死率及线粒体跨膜电位的变化,电镜下观察肝细胞线粒体的超微结构.结果 与假手术组相比,IRI组和IPO组肝功能明显受损(P<0.05),肝组织Bax mRNA的表达明显上调(P<0.05),Bcl-2 mRNA的表达明显下降(P<0.05),Cyt-c蛋白含量显著升高(P<0.05),肝组织细胞凋亡坏死率明显增加(P<0.05),肝细胞线粒体跨膜电位明显下降(P<0.05).而IPO组以上各项指标的改变均较IRI组明显减轻(P<0.05),肝细胞线粒体的形态结构改变也明显改善.结论 IPO可能通过抑制线粒体途径来减轻大鼠肝移植中肝脏的IRI.
目的 研究缺血後處理(IPO)減輕大鼠肝髒缺血再灌註損傷(IRI)的機製中關于線粒體途徑髮揮的作用.方法 按隨機數字錶法將SD大鼠分為3組,IRI組和IPO組建立肝移植模型,IRI組受鼠在供肝植入後,立即開放門靜脈恢複血液供應 ;IPO組受鼠在門靜脈完全開放前行IPO,即對門靜脈行開放60 s、夾閉60 s,共重複6次.假手術組大鼠在開腹後僅遊離肝週韌帶,未進行肝移植.術後6 h(IRI組和IPO組為血流完全開放後6h,下同),取各組受鼠的血液和肝組織樣本,檢測肝功能,採用逆轉錄聚閤酶鏈反應法檢測肝組織B淋巴細胞因子-2(Bcl-2)mRNA和Bcl-2共存蛋白質(Bax) mRNA的錶達,採用蛋白質印跡法檢測肝組織細胞色素C(Cyt-c)蛋白的錶達,使用流式細胞儀檢測肝組織的細胞凋亡與壞死率及線粒體跨膜電位的變化,電鏡下觀察肝細胞線粒體的超微結構.結果 與假手術組相比,IRI組和IPO組肝功能明顯受損(P<0.05),肝組織Bax mRNA的錶達明顯上調(P<0.05),Bcl-2 mRNA的錶達明顯下降(P<0.05),Cyt-c蛋白含量顯著升高(P<0.05),肝組織細胞凋亡壞死率明顯增加(P<0.05),肝細胞線粒體跨膜電位明顯下降(P<0.05).而IPO組以上各項指標的改變均較IRI組明顯減輕(P<0.05),肝細胞線粒體的形態結構改變也明顯改善.結論 IPO可能通過抑製線粒體途徑來減輕大鼠肝移植中肝髒的IRI.
목적 연구결혈후처리(IPO)감경대서간장결혈재관주손상(IRI)적궤제중관우선립체도경발휘적작용.방법 안수궤수자표법장SD대서분위3조,IRI조화IPO조건립간이식모형,IRI조수서재공간식입후,립즉개방문정맥회복혈액공응 ;IPO조수서재문정맥완전개방전행IPO,즉대문정맥행개방60 s、협폐60 s,공중복6차.가수술조대서재개복후부유리간주인대,미진행간이식.술후6 h(IRI조화IPO조위혈류완전개방후6h,하동),취각조수서적혈액화간조직양본,검측간공능,채용역전록취합매련반응법검측간조직B림파세포인자-2(Bcl-2)mRNA화Bcl-2공존단백질(Bax) mRNA적표체,채용단백질인적법검측간조직세포색소C(Cyt-c)단백적표체,사용류식세포의검측간조직적세포조망여배사솔급선립체과막전위적변화,전경하관찰간세포선립체적초미결구.결과 여가수술조상비,IRI조화IPO조간공능명현수손(P<0.05),간조직Bax mRNA적표체명현상조(P<0.05),Bcl-2 mRNA적표체명현하강(P<0.05),Cyt-c단백함량현저승고(P<0.05),간조직세포조망배사솔명현증가(P<0.05),간세포선립체과막전위명현하강(P<0.05).이IPO조이상각항지표적개변균교IRI조명현감경(P<0.05),간세포선립체적형태결구개변야명현개선.결론 IPO가능통과억제선립체도경래감경대서간이식중간장적IRI.
Objective To investigate theeffect of ischemic postconditioning (IPO) on ischemia/reperfusion injury via mitochondrial pathway.Methods Male Sprague-Dawley rats were divided into three groups by means of random number table.Rats in IRI group and IPO group received liver transplantation.The portal vein in IRI group was opened immediately after liver implantation to restore the blood supply.The graft rats in IPO group received IPO before the portal vein was completely opened: 60-s ischemia and 60-s reperfusion of the portal vein,repeated 6 times).The rats in the sham-operation group were only subject to dissociation of the liver ligament.Six h after portal vein reperfusion,liver function was tested.The expression of Bcl-2 mRNA and Bax mRNA was detected by using real time-PCR.The protein expression of Cyt-c was detected by using Western blotting.The apoptosis and necrosis of liver tissue and the mitochondrial transmembrane potential were detected by using flow cytomertry.The changes of mitochondrial structure were observed under an electron microscope.Results The liver functions in IRI group and IPO group were significantly worse (P<0.05),the levels of Bax mRNA were significantly higher (P<0.05),the levels of Bcl-2 mRNA were significantly lower (P<0.05),the levels of Cyt-c protein were significantly higher (P<0.05),the levels of apoptosis and necrosis were significantly higher (P<0.05),and mitochondrial transmembrane potential (MTP) of liver cells was significantly lower (P<0.05) than in sham operation group.The changes of all the parameters in IRI group were more significant than in IPO group (P < 0.05).The morphological changes of the liver mitochondria were also significantly aggravated in IRI group as compared with IPO group.Conclusion IPO reduced IRI by inhibiting the mitochondrial signaling pathway in rats undergoing liver transplantation.