柴胡疏肝散對(duì)非酒精性脂肪肝胰島素抵抗大鼠的防治作用及機(jī)制研究
發(fā)布時(shí)間:2018-04-01 23:13
本文選題:柴胡疏肝散 切入點(diǎn):非酒精性脂肪肝 出處:《廣東藥學(xué)院》2014年碩士論文
【摘要】:目的:通過(guò)高脂高糖乳劑復(fù)制非酒精性脂肪肝。∟AFLD)胰島素抵抗大鼠模型并以柴胡疏肝散進(jìn)行干預(yù),探討柴胡疏肝散對(duì)NAFLD胰島素抵抗大鼠的防治作用及其可能作用機(jī)制,以期為臨床應(yīng)用柴胡疏肝散防治NAFLD提供進(jìn)一步科學(xué)依據(jù)。 方法:取SD大鼠48只,按體質(zhì)量隨機(jī)分為正常對(duì)照組、模型組、東寶肝泰組(0.09g蛋氨酸/kg)、柴胡疏肝散高、中、低劑量組(12.6、6.3、3.15g生藥/kg)。除正常組外,其余各組ig高脂高糖乳劑建立NAFLD大鼠模型,造模同時(shí)分別給各給藥組ig相應(yīng)藥物,正常組、模型組ig生理鹽水,連續(xù)8周。實(shí)驗(yàn)期間,每天記錄大鼠的生長(zhǎng)狀況,,每周定期稱(chēng)量并記錄大鼠的體重。于第8周末,所有大鼠用3%戊巴比妥鈉(按劑量1ml/kg)進(jìn)行麻醉,腹主動(dòng)脈取血并及時(shí)摘取肝臟。肉眼觀察各組大鼠肝臟形態(tài)變化并及時(shí)稱(chēng)量濕重,光鏡下觀察肝細(xì)胞病理形態(tài)變化并對(duì)脂肪變性程度進(jìn)行分級(jí),測(cè)定各組大鼠血脂、肝脂、肝功能、丙二醛(MDA)、超氧化物歧化酶(SOD)、總谷胱甘肽(T-GSH)、空腹血糖、胰島素,并計(jì)算肝指數(shù)、胰島素抵抗指數(shù)(IR)、胰島素敏感指數(shù)(ISI)、胰島素分泌指數(shù)(HOMA-IS),RT-PCR法檢測(cè)肝臟脂聯(lián)素(Adiponectin)和瘦素(Leptin) mRNA的表達(dá)。 結(jié)果:與正常組比較,模型組大鼠血清TC、TG、LDL-C、FFA、FBG、FINS、IRI、AST、ALT水平顯著升高(P<0.01),血清HDL-C、ISI、HOMA-IS水平顯著降低(P<0.01),肝指數(shù)及肝臟TC、TG、MDA水平均顯著升高(P<0.01),肝臟SOD活性明顯下降,肝臟Adiponectin mRNA表達(dá)量明顯減少(P<0.01)、Leptin mRNA表達(dá)量明顯增多(P<0.01);肝臟病理切片顯示模型組大鼠肝細(xì)胞索排列紊亂,肝小葉界限不清,肝竇消失,肝細(xì)胞體積明顯增大、呈腫脹狀,出現(xiàn)彌漫性脂肪變性。與模型組比較,柴胡疏肝散各劑量組血清TC、TG、FFA、AST、ALT、FBG、FINS、IRI水平顯著降低(P<0.05,0.01),血清HDL-C、ISI、HOMA-IS水平顯著升高(P<0.01),中、高劑量組血清LDL-C水平顯著降低(P<0.01);各劑量組肝臟TC、TG水平均顯著降低(P<0.01),中劑量組肝臟MDA含量顯著下降(P0.01);各劑量組肝臟Adiponectin mRNA水平水平顯著上調(diào)(P<0.01),各劑量組肝臟Leptin mRNA水平顯著下調(diào)(P<0.01);各劑量組肝指數(shù)水平、肝臟SOD活性和T-GSH含量只呈一定劑量變化趨勢(shì)但無(wú)顯著性差異。肝臟病理切片顯示柴胡疏肝散可明顯減輕NAFLD胰島素抵抗大鼠肝細(xì)胞脂肪變性、水樣變性及炎癥細(xì)胞浸潤(rùn)等病理癥狀。 結(jié)論:本課題以高脂高糖乳劑灌胃八周復(fù)制的NAFLD胰島素抵抗大鼠模型與現(xiàn)代人類(lèi)日常飲食所致的NASH代謝改變相似,存在相同的發(fā)病機(jī)制,是較理想的NASH模型。 柴胡疏肝散可有效減輕NAFLD大鼠肝臟脂肪變性,降低血清脂質(zhì)、FFA、肝臟脂質(zhì)水平及肝臟脂質(zhì)過(guò)氧化程度,提高胰島素敏感性和改善肝功能,顯著上調(diào)脂聯(lián)素的表達(dá)和下調(diào)瘦素的表達(dá),對(duì)NAFLD具有較好的防治功效。其可能的作用機(jī)制為:(1)通過(guò)增強(qiáng)外周脂肪酸氧化能力、減少外源性脂質(zhì)的吸收、降低內(nèi)源性脂質(zhì)的生成及提高肝臟脂質(zhì)的轉(zhuǎn)運(yùn)來(lái)減輕機(jī)體脂質(zhì)的蓄積;(2)通過(guò)消除肝臟大量的ROS和自由基來(lái)增強(qiáng)肝臟抗氧化應(yīng)激能力;(3)通過(guò)穩(wěn)定肝細(xì)胞膜,修復(fù)損害的肝細(xì)胞,減輕肝細(xì)胞變性壞死,促進(jìn)肝細(xì)胞再生來(lái)保護(hù)肝細(xì)胞;(4)通過(guò)降低血糖和體內(nèi)胰島素水平和增強(qiáng)胰島素敏感性來(lái)改善胰島素抵抗;(5)通過(guò)上調(diào)肝臟脂聯(lián)素的表達(dá)增強(qiáng)胰島素與細(xì)胞膜受體的結(jié)合來(lái)提高肝臟對(duì)胰島素的敏感感性,增強(qiáng)肝內(nèi)脂肪酸β氧化、降低脂質(zhì)在肝臟中的蓄積及減少肝臟糖原異生及肝糖輸出來(lái)改善胰島素抵抗;(6)通過(guò)下調(diào)肝臟瘦素的表達(dá)來(lái)促進(jìn)肝內(nèi)脂肪代謝、調(diào)節(jié)肝組織對(duì)胰島素的敏感性、增強(qiáng)外周脂肪酸氧化能力及抑制炎癥的發(fā)生。
[Abstract]:Objective: through high fat sucrose emulsion copy of nonalcoholic fatty liver disease (NAFLD) rat model of insulin resistance and Chaihushugansan intervention of Chaihushugansan on prevention and treatment of insulin resistance in NAFLD rats and its possible mechanism, in order for the clinical application of Bupleurum Shugan powder in the treatment of NAFLD to provide further scientific basis.
Methods: 48 SD rats were randomly divided into normal control group, model group, Dongbao Gantai group (0.09g methionine /kg), CHSGS high, low dose group (12.6,6.3,3.15g crude drug /kg). Except the normal group, the other groups Ig high sugar fat emulsion to establish the model of NAFLD the rat model at the same time, for each drug group Ig corresponding medicine, normal group, model group, Ig normal saline for 8 weeks. During the experiment, the growth status of rats were recorded daily, weekly weigh and record the weight of rats. At the end of the eighth, 3% pentobarbital sodium in all rats (according to the dose 1ml/kg) anesthesia, abdominal aortic blood and timely removal of the liver. The pathological changes of the liver were observed in rats and weighed wet weight were observed by light microscope and pathological changes of liver cells and classification of fatty degeneration, determination of blood lipids of rats, liver lipid, liver function, malondialdehyde (MDA), superoxide Chemical dismutase (SOD), total glutathione (T-GSH), fasting blood glucose, insulin, and liver index, insulin resistance index (IR), insulin sensitivity index (ISI), insulin secretion index (HOMA-IS), RT-PCR method were used to detect the expression of adiponectin (Adiponectin) and leptin (Leptin) mRNA.
緇撴灉錛氫笌姝e父緇勬瘮杈
本文編號(hào):1697718
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