重組人生長(zhǎng)激素對(duì)梗阻性黃疸大鼠腸黏膜緊密連接蛋白claudin-3及PKA的影響
發(fā)布時(shí)間:2018-10-12 08:24
【摘要】:目的:對(duì)梗阻性黃疸早期應(yīng)用重組人生長(zhǎng)激素(recombinant human growthhormone, rhGH)的實(shí)驗(yàn)研究基礎(chǔ)上,采用梗阻性黃疸大鼠模型,模擬臨床上梗阻性黃疸患者腸黏膜上皮損傷的病理生理機(jī)制,研究緊密連接蛋白(tight junction associated protin, TJP) claudin-3和蛋白激酶-A (protein kinase A,PKA)在梗阻性黃疸大鼠腸黏膜的表達(dá),探討其作用機(jī)制。 方法:將63只健康wistar大鼠,雌雄不分,隨機(jī)分為5組:Ⅰ=假手術(shù)組(sham operated,簡(jiǎn)稱S0組)共計(jì)15只:Ⅱ=膽總管結(jié)扎(common bile duct ligation,簡(jiǎn)稱CBDL)7天組共計(jì)12只;Ⅲ=CBDL14天組共計(jì)11只;IV=CBDL+rhGH(簡(jiǎn)稱rhGH組)7天組共計(jì)13只;V=rhGH14天組共計(jì)12只。CBDL組與rhGH組麻醉后游離出膽總管后用4.0絲線結(jié)扎,使膽總管被阻斷,制成梗阻性黃疸模型組。rhGH組從術(shù)后第一天開(kāi)始每日予腹腔內(nèi)注射rhGH(上海復(fù)蒙基因生物科技有限公司提供),S0組及CBDL組以等量的生理鹽水作對(duì)照。實(shí)驗(yàn)7天及14天后分別檢測(cè)各組肝功能指標(biāo)的變化及應(yīng)用免疫組化、光鏡下半定量分析等方法觀察末端回腸小腸黏膜形態(tài)學(xué)改變,并觀測(cè)緊密連接蛋白claudin-3及PKA在末端回場(chǎng)黏膜上皮細(xì)胞上的表達(dá)情況。應(yīng)用SPSS17.0統(tǒng)計(jì)軟件進(jìn)行數(shù)據(jù)的統(tǒng)計(jì)分析。 結(jié)果: 1) CBDL組、rhGH組較SO組相比,TBIL、DBIL、ALT水平有顯著增高(P0.05):CBDL組與rhGH組相比TBIL、DBIL、ALT水平顯著增高,有差異性(P0.05);CBDL14天組較CBDL7天組各項(xiàng)肝功能水平增高,有統(tǒng)計(jì)學(xué)意義(P0.05); rhGH組隨時(shí)間的延長(zhǎng)無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)。 2)CBDL組、rhGH組較s0組相比,腸黏膜嚴(yán)重?fù)p傷,有顯著的差異性(P0.05);CBDL組隨梗阻時(shí)間推移腸黏膜損傷程度進(jìn)行性加重(P0.05);rhGH組較CBDL組各時(shí)段腸黏膜損傷程度明顯降低,有顯著的統(tǒng)計(jì)學(xué)意義(P0.05);rhGH組隨時(shí)間的推移無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)。 3) CBDL組、rhGH組較S0組相比腸黏膜緊密連接蛋白claudin-3的表達(dá)水平顯著降低,有明顯的統(tǒng)計(jì)學(xué)意義(P0.05);CBDL組較rhGH組各時(shí)段claudin-3的表達(dá)水平顯著降低,有差異性(P0.05);rhGH組中隨時(shí)間的延遲,claudin-3的表達(dá)水平略有增高,但無(wú)顯著差異(P0.05);CBDL組中隨著時(shí)間的推移claudin-3的表達(dá)水平降低,有統(tǒng)計(jì)學(xué)意義(P0.05) 4)CBDL組、rhGH組較S0組相比腸黏膜緊密連接蛋白PKA的表達(dá)水平顯著增高,有明顯的統(tǒng)計(jì)學(xué)意義(P0.05):CBDL組較rhGH組各時(shí)段PKA的表達(dá)水平顯著增高,有差異性(P0.05):rhGH組中隨時(shí)間的延遲,PKA的表達(dá)水平略有減低,但無(wú)顯著差異(P0.05):CBDL組中隨著時(shí)間的推移PKA的表達(dá)水平增高,有統(tǒng)計(jì)學(xué)意義(P0.05)。 結(jié)論: 1.rhGH能上調(diào)梗阻性黃疸大鼠腸黏膜緊密連接蛋白claudin-3表達(dá)。 2.梗阻性黃疸大鼠可能通過(guò)PKA信號(hào)傳導(dǎo)通路損傷腸黏膜屏障功能。
[Abstract]:Objective: to simulate the pathophysiological mechanism of intestinal mucosal epithelium injury in patients with obstructive jaundice by using the rat model of obstructive jaundice on the basis of early application of recombinant human growth hormone (recombinant human growthhormone, rhGH) in obstructive jaundice. To investigate the expression of tight junction protein (tight junction associated protin, TJP) claudin-3) and protein kinase (A (protein kinase) in intestinal mucosa of rats with obstructive jaundice. Methods: 63 healthy wistar rats, male and female, were randomly divided into 5 groups: group 鈪,
本文編號(hào):2265454
[Abstract]:Objective: to simulate the pathophysiological mechanism of intestinal mucosal epithelium injury in patients with obstructive jaundice by using the rat model of obstructive jaundice on the basis of early application of recombinant human growth hormone (recombinant human growthhormone, rhGH) in obstructive jaundice. To investigate the expression of tight junction protein (tight junction associated protin, TJP) claudin-3) and protein kinase (A (protein kinase) in intestinal mucosa of rats with obstructive jaundice. Methods: 63 healthy wistar rats, male and female, were randomly divided into 5 groups: group 鈪,
本文編號(hào):2265454
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