間歇性高原低氧抗心肌缺血再灌注損傷的線粒體機(jī)制研究
[Abstract]:Objective: many studies have shown that intermittent high altitude (Intermittent high altitude hypoxia-IHA hypoxia can significantly improve the ability of myocardium to resist ischemia / hypoxia, as shown by a significant reduction of cardiac systolic and diastolic function after ischemia-reperfusion. Reduce the incidence of arrhythmia after ischemia reperfusion, reduce the size of myocardial infarction and so on. However, little research has been done on the role of mitochondria in myocardial protection after hypoxia. The purpose of this study was to investigate the effects of intermittent high altitude hypoxia on the respiratory function of myocardial mitochondria, the expression of mitochondrial KATP channel (mitoKATP) and mitochondrial protein in mitochondrial permeability transition pore (MPTP), and their role in the prevention of ischemia-reperfusion injury. Methods: male Sprague-Dawley rats were randomly divided into normoxic group (Normoxia) and intermittent high altitude hypoxia group (intermittent high altitude hypoxia group). The rats in intermittent high altitude hypoxia group were treated with hypobaric hypoxia at a height of 5000m for 42 days for 6 hours per day. After hypoxic exposure, myocardial ischemia (30 min) / reperfusion (120 min) injury model was induced by Langendorff perfusion in control group and intermittent high altitude hypoxia group. The mitochondria of left ventricular cardiomyocytes were isolated by differential centrifugation, the changes of mitochondria A540 in different concentrations of Ca2 were detected, the amount of cytochrome C leaked from mitochondria was determined by Western Blotting, and the myocardial cells were isolated with indo-1 as the fluorescent indicator of Ca2. The changes of intracellular and mitochondrial calcium and the activity of cardiomyocytes during simulated ischemia-reperfusion were detected. The protein expression in myocardial mitochondria after intermittent high altitude hypoxia training was studied by proteomics. Results: in the Langendorff perfusion experiment of isolated heart, it was observed that ischemia-reperfusion inhibited the recovery of myocardial function in normoxic rats. Intermittent high altitude hypoxia could promote the recovery of cardiac function after ischemia-reperfusion. Increased 鹵dP/dt max and PRP decreased LVEDPand reduced myocardial infarction size induced by ischemia-reperfusion. These protective effects could be eliminated at the first 15 minutes after reperfusion treated with specific MPTP opener atractyloside (Atr). Intermittent high altitude hypoxia can reduce the degree of intracellular calcium overload in myocardial cells during ischemia-reperfusion. Atr treatment at the beginning of reperfusion can significantly increase intracellular calcium overload water in cytoplasm and mitochondria during reperfusion.
【學(xué)位授予單位】:中國(guó)科學(xué)院研究生院(上海生命科學(xué)研究院)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2005
【分類號(hào)】:R363
【共引文獻(xiàn)】
相關(guān)期刊論文 前10條
1 黃麗英;;低氧運(yùn)動(dòng)對(duì)大鼠心肌線粒體結(jié)構(gòu)和功能的影響[J];首都體育學(xué)院學(xué)報(bào);2009年04期
2 王芳;王迪芬;;異丙酚對(duì)缺血再灌注損傷的保護(hù)作用研究進(jìn)展[J];濱州醫(yī)學(xué)院學(xué)報(bào);2006年06期
3 李沛清;劉喜平;陳徹;;心肌缺血/再灌注對(duì)心肌細(xì)胞線粒體的影響及中藥保護(hù)作用的研究近況[J];甘肅中醫(yī)學(xué)院學(xué)報(bào);2007年02期
4 李霞;賀博然;許丹;尚小明;張春來(lái);;寬心合劑對(duì)大鼠心臟急性缺血再灌注損傷心肌保護(hù)作用的研究[J];河北中醫(yī);2009年05期
5 王文昭,繆明永,邵福源,趙忠新,趙瑛,王學(xué)敏;褪黑素對(duì)腦缺血后線粒體的影響[J];中華老年心腦血管病雜志;2000年05期
6 張煜,焦青萍,黃蕓,張維,徐紅,邱朝暉,談中茹,李開(kāi)滬;Egb761對(duì)SD乳鼠心肌細(xì)胞外鈣內(nèi)流的影響研究[J];老年醫(yī)學(xué)與保健;2001年01期
7 李雙鳳;王丹;王亞平;冉珂;唐正國(guó);呂靜;;MPTP參與硫化氫對(duì)大鼠心肌缺血再灌注損傷的延遲性保護(hù)作用[J];東南大學(xué)學(xué)報(bào)(醫(yī)學(xué)版);2010年06期
8 李永芳;線粒體在抗缺血復(fù)灌中的重要作用[J];青海醫(yī)學(xué)院學(xué)報(bào);2003年02期
9 田藹萍,馬平;異丙酚對(duì)缺血再灌注損傷的影響[J];實(shí)用骨科雜志;2005年04期
10 時(shí)雨;范虹;;線粒體ATP敏感的鉀通道和缺血再灌注損傷[J];復(fù)旦學(xué)報(bào)(醫(yī)學(xué)版);2007年05期
相關(guān)博士學(xué)位論文 前10條
1 姚立農(nóng);異氟醚對(duì)離體大鼠心臟心肌頓抑的影響[D];軍醫(yī)進(jìn)修學(xué)院;2001年
2 盛紅專;肥厚心肌鈣調(diào)神經(jīng)磷酸酶、絲裂素活化蛋白激酶磷酸化調(diào)節(jié)和逆轉(zhuǎn)機(jī)制研究[D];南京醫(yī)科大學(xué);2003年
3 黃麗英;間歇低氧訓(xùn)練對(duì)大鼠氧化應(yīng)激及其低氧適應(yīng)機(jī)制的研究[D];華東師范大學(xué);2003年
4 陳邁;刺激心臟κ阿片受體引起延遲性預(yù)處理保護(hù)作用的細(xì)胞內(nèi)機(jī)制研究[D];第四軍醫(yī)大學(xué);2004年
5 王秀華;蒺藜皂苷對(duì)心肌缺血損傷保護(hù)作用及其機(jī)制研究[D];吉林大學(xué);2004年
6 孟丹;黃芪總皂甙保護(hù)心肌損傷的機(jī)制研究[D];南京醫(yī)科大學(xué);2004年
7 邊云飛;二氮嗪藥物后適應(yīng)及其機(jī)制分析[D];山西醫(yī)科大學(xué);2005年
8 姚俊巖;經(jīng)腹主動(dòng)脈局部灌注異丙酚對(duì)脊髓缺血再灌注損傷作用及其機(jī)制的實(shí)驗(yàn)研究[D];四川大學(xué);2005年
9 蔡衛(wèi)華;海水浸泡脊髓損傷的實(shí)驗(yàn)研究及便攜式藥物注射泵的研制[D];第二軍醫(yī)大學(xué);2005年
10 田昕;線粒體凋亡途徑參與蟾蜍靈誘導(dǎo)的人類白血病細(xì)胞HL-60凋亡[D];中國(guó)醫(yī)科大學(xué);2005年
相關(guān)碩士學(xué)位論文 前10條
1 曲麗;延胡索總生物堿對(duì)Iso誘導(dǎo)急性心肌缺血大鼠模型保護(hù)作用的研究[D];黑龍江中醫(yī)藥大學(xué);2010年
2 馬宇;異丙酚對(duì)家兔心肌缺血再灌注后心肌線粒體鈣穩(wěn)態(tài)影響的研究[D];第二軍醫(yī)大學(xué);2001年
3 儲(chǔ)德勇;缺氧缺血性腦損害新生豬海馬皮層病理改變及ATP生成率、ATP合成酶活性變化[D];四川大學(xué);2002年
4 魏珂;線粒體ATP敏感性鉀通道與幼兔心臟保護(hù)的關(guān)系研究[D];重慶醫(yī)科大學(xué);2003年
5 方愛(ài)莉;異丙酚對(duì)過(guò)氧化氫所致的心肌線粒體損傷的影響[D];山西醫(yī)科大學(xué);2003年
6 葛錦峰;曲美他嗪代謝干預(yù)抗心肌缺血再灌注損傷的實(shí)驗(yàn)研究[D];蘇州大學(xué);2003年
7 毛新俊;異丙酚對(duì)兔小腸缺血—再灌注損傷保護(hù)作用的研究[D];廣西醫(yī)科大學(xué);2004年
8 陸熙園;熱休克蛋白27在間歇性低氧預(yù)適中所起的心肌保護(hù)作用[D];福建農(nóng)林大學(xué);2004年
9 王磊;復(fù)方纈芎滴丸對(duì)心肌缺血保護(hù)作用及其機(jī)制探討[D];武漢大學(xué);2004年
10 王璋;長(zhǎng)期間歇性缺氧預(yù)適應(yīng)對(duì)心肌缺血再灌注損傷保護(hù)機(jī)制的研究[D];第三軍醫(yī)大學(xué);2003年
,本文編號(hào):2188342
本文鏈接:http://sikaile.net/yixuelunwen/binglixuelunwen/2188342.html