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有大神能给详细解释下,什么是OT1和OT2小鼠,以及它们在科学研究中的用途吗?还有什么OVA啊?

2015-01-21动漫

2020年更新:

Ovalbumin 简称OVA,卵清蛋白(鸡)。因此,当OVA注射给小鼠会引发免疫反应。

OT-1小鼠是体内CD8+T特异性识别OVA

OT-11小鼠是体内CD4+T特异性识别OVA

这样有什么用呢,举个例子,表达OVA的肿瘤打给小鼠,再给小鼠OT-1的CD8+T,相当于给小鼠肿瘤特异性T细胞。(给个赞再走啊~谢谢!)

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OT-II: (CD4+---------ovalbumin 323-339 )

These transgenic mice express the mouse alpha-chain and beta-chain T cell receptor that pairs with the CD4 coreceptor and is specific for chicken ovalbumin 323-339 in the context of I-A b. Homozygous mice are viable and fertile. In these mice there is a four-fold increase in the CD4 to CD8 peripheral T cell ratio, and lymph node T cells demonstrate a dose-dependent proliferative response to the specific ovalbumin ligand. These transgenic mice are useful for studying in vivo T cell biology such as TCR-ligand interactions, T cell activation, thymic selection, cross-presentation of antigens, process of thymic selection and central and peripheral T cell tolerance and induction.

OT-I: (CD8+---------ovalbumin 257-264 )

These mice contain transgenic inserts for mouse Tcra-V2 and Tcrb-V5 genes. The transgenic T cell receptor was designed to recognize ovalbumin residues 257-264 in the context of pKb and used to study the role of peptides in positive selection and the response of CD8+ T cells to antigen. Like most TCR transgenics, these mice are somewhat immunodeficient.