老年肥胖食蟹猴糖尿病動(dòng)物模型的建立
發(fā)布時(shí)間:2019-03-02 16:13
【摘要】: 目的 糖尿病(Diabetes Mellitus,DM)是一種內(nèi)分泌代謝失常性疾病,發(fā)病率高,難根治、并發(fā)癥多。目前糖尿病已成為僅次于腫瘤和心血管疾病之后列到第三大危害人類的疾病,但以病患者為直接研究對(duì)象進(jìn)行科學(xué)研究受到諸多因素的制約,尤其是倫理學(xué)方面的限制。故有必要建立糖尿病動(dòng)物模型來開展相關(guān)的基礎(chǔ)性和應(yīng)用研究。 本研究擬建立猴Ⅰ型糖尿病動(dòng)物模型。而Ⅰ型糖尿病造模方法有手術(shù)、化學(xué)損傷誘導(dǎo)、和病毒誘導(dǎo)等,其中最常用的是鏈脲佐菌素(STZ)。目前國(guó)內(nèi)外已經(jīng)建立的猴Ⅰ型糖尿病動(dòng)物模型均未考慮肥胖、年齡等糖尿病易感因素,本研究擬在研究中引入上述因素,同時(shí)探討猴糖尿病的系統(tǒng)診斷標(biāo)準(zhǔn)。主要用于Ⅰ型糖尿病造模的動(dòng)物有大鼠、小鼠、猴等。大鼠、小鼠價(jià)格便宜,但與人類遺傳差異差異較大。如胰島淀粉樣多肽(LAPP)作為胰島淀粉樣物的特有成分是由37個(gè)氨基酸組成的多肽,主要是由胰島β細(xì)胞分泌。LAPP作為與糖尿病關(guān)系密切的物質(zhì)僅在人、猴、貓、浣熊存在。 方法 本課題以食蟹猴為對(duì)象,選用8只13歲以上的老年雄性肥胖食蟹猴分為模型組、對(duì)照組,模型組禁食16小時(shí)后一次性靜脈注射STZ(臨用前由0.1mmol/l、pH4.2-4.5檸檬酸緩沖液配成1%濃度),劑量為45mg/kg;對(duì)照猴同樣禁食16小時(shí)后一次性靜脈注射0.1mmol/l、pH4.2-4.5檸檬酸緩沖液,劑量為45mg/kg。定時(shí)檢測(cè)動(dòng)物血糖、尿糖、GAD-Ab、C肽、靜脈葡萄糖耐量試驗(yàn)(Ⅳ.GTT)和詳細(xì)記錄動(dòng)物的攝食量、飲水量、排尿量及體重的變化等與糖尿病相關(guān)的臨床指標(biāo),并對(duì)動(dòng)物進(jìn)行組織病理學(xué)檢查。 結(jié)果 模型猴造模后攝食、飲水、尿量均比未給藥前有明顯升高,有統(tǒng)計(jì)學(xué)意義(P<0.05),空腹血糖從造模后第二周開始明顯升高,此外尿糖也在造模后第二周由陰性變?yōu)?000mmol/L,糖耐量第5周由造模開始的正常狀態(tài)變?yōu)樘悄土慨惓。造模后第七周C肽(衡量胰島細(xì)胞功能的重要指標(biāo))明顯降低,GAD—Ab(Ⅰ型糖尿病患者最早出現(xiàn)的自身抗體)由陰性變?yōu)殛栃。精神狀況、甘油三脂、總膽固醇沒有顯著變化。而對(duì)照猴攝食、飲水、尿量或者無明顯變化,或者僅有少量下降,血糖、尿糖、糖耐量正常。 結(jié)論 本研究通過STZ人工誘導(dǎo)食蟹猴,建立了誘發(fā)性Ⅰ型糖尿病動(dòng)物模型。同時(shí)研究顯示食蟹猴糖尿病的診斷標(biāo)準(zhǔn):(1)空腹血糖≥8.0mmol/L且持續(xù)3周以上?崭怪钢辽8h未進(jìn)食。(2)葡萄糖耐量試驗(yàn)中,葡萄糖負(fù)荷后2h血糖≥10.0mmol/L。具有以上二條之一皆可視為動(dòng)物已患有糖尿病,若動(dòng)物C肽下降、GAD—Ab變?yōu)殛栃?則可認(rèn)為此糖尿病為Ⅰ型。
[Abstract]:Objective Diabetes mellitus (Diabetes Mellitus,DM) is an endocrine metabolic disorder with high incidence, difficult to cure and many complications. At present, diabetes has become the third most harmful disease after tumor and cardiovascular disease. However, the scientific research on patients with diabetes is restricted by many factors, especially in ethics. Therefore, it is necessary to establish diabetic animal model to carry out related basic and applied research. The animal model of type I diabetes mellitus in monkeys was established in this study. The methods of modeling type I diabetes include surgery, chemical injury induction, and viral induction. Among them, streptozotocin (STZ). Is the most commonly used method. The animal models of type 鈪,
本文編號(hào):2433222
[Abstract]:Objective Diabetes mellitus (Diabetes Mellitus,DM) is an endocrine metabolic disorder with high incidence, difficult to cure and many complications. At present, diabetes has become the third most harmful disease after tumor and cardiovascular disease. However, the scientific research on patients with diabetes is restricted by many factors, especially in ethics. Therefore, it is necessary to establish diabetic animal model to carry out related basic and applied research. The animal model of type I diabetes mellitus in monkeys was established in this study. The methods of modeling type I diabetes include surgery, chemical injury induction, and viral induction. Among them, streptozotocin (STZ). Is the most commonly used method. The animal models of type 鈪,
本文編號(hào):2433222
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