天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 醫(yī)學(xué)論文 > 病理論文 >

胰腺干細胞及轉(zhuǎn)分化過程的免疫學(xué)特性研究

發(fā)布時間:2018-09-09 13:22
【摘要】: 目的:分離、純化、擴增大鼠胰腺導(dǎo)管上皮細胞,在體外誘導(dǎo)轉(zhuǎn)分化為胰島樣細胞,分離、純化大鼠胰島,比較胰腺干細胞、轉(zhuǎn)分化胰島樣細胞與天然胰島的免疫學(xué)的特性,探討胰腺干細胞在臨床應(yīng)用中免疫學(xué)問題,為干細胞臨床應(yīng)用打下基礎(chǔ)。 方法:(1)分離消化SD大鼠胰腺,用差異性貼壁、低血清培養(yǎng)等方法純化出大鼠胰腺導(dǎo)管上皮細胞,通過含KGF、EGF、ITS等細胞因子的基礎(chǔ)培養(yǎng)基使其有效擴增,觀察細胞增殖能力,并繪制生長曲線,免疫細胞化學(xué)染色法鑒定其表面標志CK-19的表達。當(dāng)細胞擴增、融合至80%—90%時,改變細胞培養(yǎng)方案,通過含有exendin-4、KGF、NIC等細胞因子和葡萄糖的培養(yǎng)基,使胰腺導(dǎo)管上皮細胞轉(zhuǎn)分化胰島樣細胞。(2)觀察細胞生長狀態(tài)并攝片。對轉(zhuǎn)分化4周后的胰島樣細胞進行DTZ染色鑒定。(3)分離純化SD大鼠天然胰島,DTZ染色鑒定。(4)分離SD大鼠外周血淋巴細胞,分別地與胰腺干細胞、轉(zhuǎn)分化的胰島樣細胞、天然胰島細胞混合培養(yǎng),用ELISA檢測培養(yǎng)上清中IL-2的水平,Elispot檢測IFN-γ的分泌水平,流式細胞術(shù)檢測共培養(yǎng)后的淋巴細胞的MHC-Ⅰ和MHC-Ⅱ的表達。(5)把胰腺干細胞、轉(zhuǎn)分化的胰島樣細胞、天然胰島細胞分別注入大鼠大腿內(nèi)側(cè)肌,5d后處死,做病理切片,HE染色,觀其炎癥反應(yīng)。(6)制備1型糖尿病大鼠模型,將胰腺干細胞、轉(zhuǎn)分化的胰島樣細胞、天然胰島細胞移植到糖尿病大鼠模型皮下,分別在1d、3d、5d、7d采取大鼠未靜脈血,流式細胞術(shù)檢測MHC-Ⅱ的表達和ELISA檢測血清中IFN-γ的水平。 結(jié)果:(1)成功分離、純化了大鼠胰腺導(dǎo)管上皮細胞,使其有效擴增,并有效抑制了胰島細胞和成纖維細胞的污染,純化后大部分細胞CK-19(胰腺導(dǎo)管上皮細胞的標志)表達陽性。(2)誘導(dǎo)后細胞逐漸增大、變形,并出現(xiàn)類圓形小細胞,聚集成團,呈圓形或橢圓形的胰島樣團狀結(jié)構(gòu),細胞團慢慢增大、增多,4周后細胞團DTZ染色陽性。(3)分離純化的大鼠天然胰島,DTZ染色陽性。(4)胰腺干細胞、轉(zhuǎn)分化的胰島樣細胞、天然胰島細胞分別與淋巴細胞共培養(yǎng)5d,上清中IL-2的水平分別為44.1pg/ml、230.7pg/ml、317.6pg/ml,Elispot檢測IFN-γ斑點依次增多,MHC-Ⅰ的表達分別為15.0%、16.7%、17.9%,MHC-Ⅱ的表達分別為0.8%、轉(zhuǎn)分化胰島樣細胞和天然胰島細胞周圍炎癥反應(yīng)依次加強。(6)糖尿病大鼠模型造模成功,移植后胰腺導(dǎo)管上皮細胞組MHC-Ⅱ表達未見差異,,而轉(zhuǎn)分化的胰島樣細胞組和天然胰島組,MHC-Ⅱ的表達隨時間延長而增加。血清中IFN-γ的水平,轉(zhuǎn)分化的胰島樣細胞組和天然胰島細胞組較高胰腺干細胞組顯著升高(P<0.05)。 結(jié)論:大鼠胰腺導(dǎo)管上皮細胞在體外可得到有效擴增并具有干細胞潛能,與天然胰島細胞相比較,大鼠胰腺干細胞免疫原性較低,轉(zhuǎn)分化的胰島樣細胞免疫原性逐漸升高,表明胰腺干細胞在轉(zhuǎn)分化為胰島細胞過程中,免疫原性逐漸增強,為探討治療性干細胞免疫應(yīng)答提供了依據(jù)。
[Abstract]:AIM: To isolate, purify, enlarge rat pancreatic ductal epithelial cells, induce and transdifferentiate into islet-like cells in vitro, isolate and purify rat islets, compare the immunological characteristics of pancreatic stem cells, transdifferentiated islet-like cells and natural islets, and explore the immunological problems of pancreatic stem cells in clinical application. Basics.
Methods: (1) SD rat pancreas was isolated and digested, and the pancreatic ductal epithelial cells were purified by differential adherence and low serum culture. The cell proliferation was observed and the growth curve was drawn. The surface marker of CK-19 was identified by immunocytochemical staining. When the cells proliferated and fused to 80%-90%, the cell culture scheme was changed, and the pancreatic ductal epithelial cells were transdifferentiated into islet-like cells by means of the medium containing exendin-4, KGF, NIC and glucose. (2) The cell growth status was observed and the cells were taken. The islet-like cells were identified by DTZ staining after 4 weeks of transdifferentiation. Isolation and purification of natural islets of SD rats and identification by DTZ staining. (4) Isolation of peripheral blood lymphocytes from SD rats and mixed culture with pancreatic stem cells, transdifferentiated islet-like cells and natural islet cells respectively. The level of IL-2 in culture supernatant was detected by ELISA, the level of IFN-gamma secretion was detected by Elispot, and the co-cultured lymphocytes were detected by flow cytometry. Expression of MHC-I and MHC-II. (5) Pancreatic stem cells, transdifferentiated islet-like cells and natural islet cells were injected into the medial thigh muscles of rats respectively, and then sacrificed 5 days later. Pathological sections were made, HE staining was used to observe the inflammatory reaction. (6) The model of type 1 diabetic rats was established, and pancreatic stem cells, transdifferentiated islet-like cells and natural islet cells were transplanted into the rats. The expression of MHC-II and the level of IFN-gamma in serum were detected by flow cytometry and ELISA respectively.
Results: (1) The pancreatic ductal epithelial cells of rats were successfully isolated and purified, which effectively expanded and inhibited the contamination of islet cells and fibroblasts. Most of the purified cells were positive for CK-19 (a marker of pancreatic ductal epithelial cells). (3) The isolated and purified rat islets were positive for DTZ staining. (4) Pancreatic stem cells, transdifferentiated islet-like cells, natural islet cells and lymphocytes were co-cultured for 5 days, and the levels of IL-2 in the supernatant were 44.1 pg/m, respectively. The expression of MHC-I was 15.0%, 16.7%, 17.9%, and the expression of MHC-II was 0.8% respectively. The inflammation around the transdifferentiated islet-like cells and the natural islet cells was enhanced in turn. (6) The model of diabetic rats was successfully established. After transplantation, the expression of MHC-I in pancreatic ductal epithelial cells was increased in turn. The expression of MHC-II in the transdifferentiated islet-like cells and the natural islets increased with time. The levels of IFN-gamma in serum, the transdifferentiated islet-like cells and the natural islets were significantly higher than those in the pancreatic stem cells (P<0.05).
CONCLUSION: Rat pancreatic ductal epithelial cells can be effectively expanded in vitro and possess stem cell potential. Compared with natural pancreatic islet cells, the immunogenicity of rat pancreatic stem cells is lower, and the immunogenicity of transdifferentiated islet-like cells is gradually increased, which indicates that the immunogenicity of pancreatic stem cells is gradually enhanced during the process of transdifferentiation into islet cells. It provides a basis for exploring the therapeutic stem cell immune response.
【學(xué)位授予單位】:暨南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2007
【分類號】:R392

【相似文獻】

相關(guān)期刊論文 前10條

1 王宏;胡江;吳永華;李凌松;李麗英;洪天配;;胎兒胰腺巢蛋白陽性細胞具有間充質(zhì)表型特征[J];中國糖尿病雜志;2007年03期

2 葛煥琦;蔡寒青;門秀麗;許世清;潘煥峰;婁晉寧;;人胚胎胰腺組織干細胞的分離鑒定和純化[J];中國糖尿病雜志;2007年07期

3 李丹;馮銳成;張麗新;郭方琪;梁洋;滕春波;;通過G418處理離體純化小鼠胰腺上皮細胞[J];現(xiàn)代生物醫(yī)學(xué)進展;2011年12期

4 ;[J];;年期

5 ;[J];;年期

6 ;[J];;年期

7 ;[J];;年期

8 ;[J];;年期

9 ;[J];;年期

10 ;[J];;年期

相關(guān)會議論文 前4條

1 王法;張立新;馮銳成;張振武;趙冶;梁洋;張彥龍;安鐵洙;滕春波;;一群多能成體小鼠胰腺干細胞的分離、鑒定和分化研究[A];“細胞活動 生命活力”——中國細胞生物學(xué)學(xué)會全體會員代表大會暨第十二次學(xué)術(shù)大會論文摘要集[C];2011年

2 效梅;安立龍;張土保;吳凌峰;郭鴻波;許英梅;;小鼠胰腺干細胞的分離與培養(yǎng)的研究[A];中國畜牧獸醫(yī)學(xué)會家畜生態(tài)學(xué)分會第七屆全國代表大會暨學(xué)術(shù)研討會論文集[C];2008年

3 陳穎;于觀貞;馬大烈;倪燦榮;鄭建明;朱明華;;胰腺實性假乳頭狀瘤的免疫表型及意義[A];中華醫(yī)學(xué)會病理學(xué)分會2006年學(xué)術(shù)年會論文匯編[C];2006年

4 馬鳳霞;陳芳;韓忠朝;;造血干細胞的標志Sca-1和c-Kit在胚胎胰腺的表達[A];第13屆全國實驗血液學(xué)會議論文摘要[C];2011年

相關(guān)重要報紙文章 前6條

1 羅明典;組織仿生學(xué)的應(yīng)用研究[N];科技日報;2002年

2 記者張孟軍;不同干細胞擁有共同基因[N];科技日報;2002年

3 北京大學(xué)干細胞研究中心主任 李凌松;干細胞移植暢想曲[N];健康報;2001年

4 通訊員施揚記者衣曉峰;中加合作開展糖尿病研究[N];健康報;2002年

5 程書權(quán);干細胞技術(shù)的現(xiàn)代研究進展[N];中國醫(yī)藥報;2003年

6 張亮;Ⅰ型糖尿病治療找到新方法[N];科技日報;2004年

相關(guān)博士學(xué)位論文 前10條

1 江學(xué)良;骨髓間充質(zhì)干細胞在胰腺生理更新和病理再生中的作用[D];第二軍醫(yī)大學(xué);2006年

2 王曉靜;運用nestin-EGFP轉(zhuǎn)基因小鼠研究腦和胰腺中nestin陽性細胞的體外增殖分化潛能[D];山東大學(xué);2004年

3 安家澤;大鼠β細胞素在胰腺干細胞轉(zhuǎn)分化中的作用[D];第四軍醫(yī)大學(xué);2005年

4 王峗;豬胰腺干細胞分離鑒定[D];西北農(nóng)林科技大學(xué);2008年

5 張慧茹;仔豬胰腺干細胞的分離鑒定[D];西北農(nóng)林科技大學(xué);2005年

6 效梅;人胰腺干細胞建系及其誘導(dǎo)胰島移植治療大鼠糖尿病的研究[D];西北農(nóng)林科技大學(xué);2005年

7 楊明;胰腺大部分切除誘導(dǎo)大鼠胰腺增生早期的蛋白質(zhì)組學(xué)研究[D];華中科技大學(xué);2006年

8 張翊華;人胎兒骨髓間充質(zhì)干細胞與小鼠糖尿病治療[D];西北農(nóng)林科技大學(xué);2007年

9 陳波;胰腺干細胞移植治療1型糖尿病的動物實驗研究[D];山東大學(xué);2008年

10 楊開明;胰島發(fā)生、發(fā)育和再生及相關(guān)基因的研究[D];四川大學(xué);2006年

相關(guān)碩士學(xué)位論文 前10條

1 耿嵐;胰腺干細胞及轉(zhuǎn)分化過程的免疫學(xué)特性研究[D];暨南大學(xué);2007年

2 胡利霞;胰腺干細胞的原位傳代擴增培養(yǎng)方法及體內(nèi)移植的初步探討[D];廣西醫(yī)科大學(xué);2010年

3 張磊;成體大鼠胰腺干細胞的獲取、定向分化及體內(nèi)移植的實驗研究[D];泰山醫(yī)學(xué)院;2010年

4 寇亞麗;體外誘導(dǎo)胰腺干細胞分化為胰島樣結(jié)構(gòu)的初步探討[D];廣西醫(yī)科大學(xué);2011年

5 程志強;胰島對胰腺干細胞促成熟作用及機制的實驗研究[D];山東大學(xué);2010年

6 趙婷;人胰腺干細胞生物學(xué)特性的研究[D];西北農(nóng)林科技大學(xué);2007年

7 鄭偉;同種異體胰島及胰腺干細胞來源的胰島樣結(jié)構(gòu)序貫移植治療糖尿病[D];第四軍醫(yī)大學(xué);2008年

8 吳杭格;新生豬胰腺干細胞的分離培養(yǎng)與鑒定[D];吉林農(nóng)業(yè)大學(xué);2008年

9 馮若鵬;胎豬胰腺干細胞分離與克隆[D];西北農(nóng)林科技大學(xué);2006年

10 史愷;昆明小鼠胰腺導(dǎo)管上皮樣細胞向胰島素分泌細胞的誘導(dǎo)分化[D];四川大學(xué);2007年



本文編號:2232500

資料下載
論文發(fā)表

本文鏈接:http://www.sikaile.net/yixuelunwen/binglixuelunwen/2232500.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶242db***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com