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    • 88. 发明申请
    • NON-LETHAL CONDITIONING METHODS FOR CONDITIONING A RECIPIENT FOR BONE MARROW TRANSPLANTATION
    • 用于骨髓移植受体调节的非牙齿调节方法
    • WO2005001040A3
    • 2005-04-14
    • PCT/US2004017051
    • 2004-05-28
    • UNIV OF LOUISVILLE RES FOUNDATILDSTAD SUZANNE T
    • ILDSTAD SUZANNE T
    • A61K31/711A61K39/395C12N20060101
    • A61K31/675A61K2039/505A61K2039/507C07K16/2809C07K16/2815
    • Mixed chimerism induces donor-specific transplantation tolerance to organ allografts. In this invention, recipient B10 (h2 ) mice were pretreated in vivo with anti-abeta-TCR and anit-CD8 mABs 3 days before total body irradiation (TBI) and transplanted with 15 X 10 allogenic (B10.BR; H2k) marrow cells. Engraftment occurred in 20%, 75% and 94% of animals conditioned with 100, 200 or 300 cGy TBI one month post bone marrow transplant (BMT), respectively. Animals without donor T cells lost their chimerism gradually within 6 months and rejected both donor and third-party skin grafts. In animals with donor T cell production, chimerism remained stable for >= 6 months and donor skin grafts were accepted. In the animals without donor T cell production, none of the expected stages of T cell development were present in the thymus, while in those with donor T cell production they were. Moreover, clonal deletion of Vbeta 5.1/2 and Vbeta 11 CD8 and CD4 T cells occurred only in chimeras with donor T cell production. These results show for the first time that donor T cell production plays a critical role in the maintenance of durable chimerism and induction of trnaplantation tolerance and is directly correlated with deletion of potentially autoreactive cells.
    • 混合嵌合体诱导供体特异性移植对器官同种异体移植的耐受性。 在本发明中,在全身照射(TBI)前3天,用抗-Teta-TCR和anit-CD8mABs在体内预处理受体B10(h2b)小鼠,并用15×10 6同种异体移植(B10)。 BR; H2k)骨髓细胞。 在骨髓移植(BMT)一个月后分别在100,200或300cGy TBI条件下进行移植的20%,75%和94%的移植物。 没有供体T细胞的动物在6个月内逐渐失去嵌合体,并拒绝供体和第三方皮肤移植物。 在具有供体T细胞产生的动物中,嵌合体保持稳定> = 6个月,并且接受供体皮肤移植物。 在没有供体T细胞生产的动物中,T细胞发育的预期阶段都不存在于胸腺中,而在具有供体T细胞生产的那些中。 此外,Vbeta 5.1 / 2 +和Vbeta 11 + CD8和CD4T细胞的克隆缺失仅在具有供体T细胞产生的嵌合体中发生。 这些结果首次表明,供体T细胞的产生在维持持久的嵌合体和诱导trnaplantation耐受中起关键作用,并与潜在的自身反应性细胞的缺失直接相关。