课题基金 / 基金详情

ISLET ALLOGRAFT TOLERANCE & THYMIC TRANSPLANTATION OF STEM CELLS

ISLET ALLOGRAFT TOLERANCE & THYMIC TRANSPLANTATION OF STEM CELLS
胰岛同种异体移植物耐受性
批准号:
6219702
负责人:
MARGARET D ALLEN
金额:
$7.46万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-05-01 至 2000-04-30

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中文摘要
翻译
这个项目的目的是在灵长类动物中测试一种新的方法, 产生对实体器官和组织移植物的耐受性, 供体CD 34+干细胞进入受体胸腺。 这些实验 在青少年中测试这种方法的有效性和可行性 狒狒模型作为临床前试验。 在胰岛移植中 方案中,通过链脲霉素诱导使猕猴患糖尿病。 然后,用来自组织供体的猕猴胰岛进行中试 胰岛移植到这些糖尿病患者的研究。 在 在狒狒实验方案中,干细胞的亚组分被测试为 在体外混合淋巴细胞试验中, 亚组分将导致最小的同种异体刺激。 因此,样品 的狒狒骨髓用于干细胞分离成各种 在体外测试的亚组分。 有希望的子分数将 用于体内胸腺内注射,以检查 供体干细胞对微嵌合体产生和持续的影响 和2)供体心脏移植物存活。 其他组织用于 对照 资助NIH赠款RR 00166、AI 37747和AI 45487。 艾伦, 医学博士,Weyhrich,J.,秋本,H.,高尔湖,Hall,J.,Dalesandro,J., Sai,S.,托马斯,R.,纳尔逊,K.A.,Andrews,R.G.延长 异基因和异种微嵌合体可以在不匹配的 通过直接胸腺内植入未进行免疫抑制的灵长类动物 CD 34+捐赠者骨髓细胞。 Cell. Immunol.181:127-138,1998. 艾伦,医学博士,Gaur,L.K.,纳尔逊,K.,de Fries,R.,Delio,P., Anasetti角,Andrews,R.G.微嵌合体在无关的 未被未成熟的CD 34+供体干细胞免疫抑制的灵长类动物。 摘要 第10届国际免疫大会,1998年11月,印度,新德里。
英文摘要
The aim of this project is to test in primates a new method for producing tolerance to solid organ and tissue grafts implantation of donor CD34+ stem cells into the recipient thymus. These experiments test the validity and feasibility of this approach in a juvenile baboon model as a pre-clinical trial. In the islet transplant protocols, macaques were made diabetic by streptozocin induction. Then, Macaca nemestrina islets from tissue donors were used for pilot studies of islet transplantation into these diabetic recipients. In the baboon protocols, subfractions of stem cells are being tested as tolerogens in in vitro mixed lymphocyte assays to ascertain which subfraction will result in the least allostimulation. Thus, samples of baboon marrow are used for stem cell separations into various subfractions which are tested in vitro. Promising subfractions will be used in in vivo intrathymic injections to examine the effects of donor stem cells on 1) production and persis ten ce of microchimerism and 2) donor cardiac graft survival. Additional tissues are used for controls. FUNDING NIH grants RR00166, AI37747, and AI45487. Allen, M.D., Weyhrich, J., Akimoto, H., Gaur, L., Hall, J., Dalesandro, J., Sai, S., Thomas, R., Nelson, K.A., and Andrews, R.G. Prolonged allogeneic and xenogeneic microchimerism can be achieved in unmatched primates without immunosuppression by direct intrathymic implantation of CD34+ donor marrow cells. Cell. Immunol. 181:127-138, 1998. Allen, M.D., Gaur, L.K., Nelson, K., de Fries, R., Delio, P., Anasetti, C., and Andrews, R.G. Microchimerism is induced in unrelated primates without immunosuppression by immature CD34+ donor stem cells. Abstr. 10th Intl Congr. Immunol., New Delhi, India, November 1998.
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