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1、類號:R329.2密級:UDC:615學(xué)校代碼:11065碩士學(xué)位論文提高大鼠脂肪間充質(zhì)干細(xì)胞轉(zhuǎn)化為胰島樣細(xì)胞能力的實驗研究何輝指導(dǎo)教師史光軍教授學(xué)科專業(yè)名稱肝膽血管外科論文答辯日期2015-05-21摘要目的:(1)大鼠脂肪間充質(zhì)干細(xì)胞的分離、提取和培養(yǎng)。(2)探討損傷胰腺提取液和細(xì)胞生長因子對脂肪間充質(zhì)干細(xì)胞分化為胰島樣細(xì)胞的影響。方法:(1)無菌條件下通過手術(shù)獲取大鼠脂肪組織,用膠原酶消化法獲取脂肪間充質(zhì)干細(xì)胞,并通過胰蛋白酶消化法傳代細(xì)胞以達(dá)到純化的目的。(2)按對照組、藥物誘導(dǎo)組、混合誘導(dǎo)組和損傷胰腺提取液組的順序進(jìn)行分
2、組,各組加入不同的細(xì)胞誘導(dǎo)因子和損傷胰腺提取液對細(xì)胞進(jìn)行誘導(dǎo)11d,誘導(dǎo)完畢后,于倒置顯微鏡下觀察細(xì)胞形態(tài)變化;用雙硫腙(STZ)染色鑒定胰島素陽性細(xì)胞;用酶聯(lián)免疫吸附試驗(ELISA)來比較高糖環(huán)境刺激前后各組胰島素分泌量的多少;通過免疫熒光染色和熒光定量-聚合酶鏈反應(yīng)(RT-PCR)來檢測相關(guān)基因的表達(dá)量。結(jié)果:(1)獲取的大鼠脂肪間充質(zhì)干細(xì)胞貼壁生長,原代細(xì)胞呈圓形;36-48h開始有梭形細(xì)胞貼壁或者成團的細(xì)胞集落形成;7-8天左右,原來成團聚集的細(xì)胞向外擴散生長,細(xì)胞之間的間隙逐漸縮小并相互融合,呈現(xiàn)旋渦狀生長。約10天左
3、右,瓶底細(xì)胞達(dá)到80%-90%融合。經(jīng)過消化傳代,細(xì)胞的純度逐漸增高。(2)誘導(dǎo)組細(xì)胞形狀變?yōu)閳A形并聚集成團,出現(xiàn)DTZ染色陽性細(xì)胞;在高糖環(huán)境作用下分泌胰島素且混合誘導(dǎo)組相比較于其余誘導(dǎo)組分泌量多;混合誘導(dǎo)組相關(guān)基因的表達(dá)量多于其余兩組。對照組未出現(xiàn)上述變化。結(jié)論:(1)膠原酶消化法能夠分離出大鼠脂肪間充質(zhì)干細(xì)胞,通過胰蛋白酶消化法可以實現(xiàn)細(xì)胞的純化。(2)損傷胰腺提取液對大鼠脂肪間充質(zhì)干細(xì)胞分化為胰島樣細(xì)胞具有促進(jìn)作用,可以提高脂肪間充質(zhì)干細(xì)胞的轉(zhuǎn)化能力。碩士研究生:何輝(肝膽外科)指導(dǎo)老師:史光軍主任醫(yī)師關(guān)鍵詞:脂肪間充質(zhì)干
4、細(xì)胞,損傷胰腺提取液,胰島樣細(xì)胞,胰島素AbstractObjective:(1)Theseparation,extractionandcultureofratadiposemesenchymalstemcells.(2)Tostudytheeffectsofinjuriedpancreaticextractandcytokinesontheindudceddifferentiationofratadiposemesenchymalstemcells(AMSCs)toislet-likecells.Methods:(1)Thead
5、iposetissueswereseparatedfromratbythesurgicaloperationunderasepticcondition.ThecollagenaseandtrypsindigestionwereusedtoextracttheAMSCsfromtissuesandcells’purification.(2)Itconsistedoffourgroups:controlgroup,celldruginducedgroup,mixedinducedgroupandinjuriedpancreaticex
6、tractgroup.Differentcytokinesandinjuriedpancreaticextractwereaddedtodifferentgroups.Thecellwasinducedwithdifferentmethodsfor11days.Cells’morphologychangeswereobservedandrecordedwithinvertedmicroscope.Insulin-positivecellswereidentifiedbydithizone(DTZ)stainingandtheamo
7、untofinsulinofeachgroupafterbeingstimulatedinthehighglucoseenvironmentweremeasuredthroughenzyme-linkedimmunosorbentassay.Therelatedgeneexpressionwasdetectedwithreal-timequantitativepolymerasechainreaction(RT-PCR)andimmunofluorescencestaining.Results:(1)TheratAMSCsatta
8、chedtotheplate.Theprimarycellswerenearlyround.Thespindlecelltypeorcellclustersappearedafter36-48h.Cellclustersgrewaroundandt