作者saviora (飓风之翼)
看板Biotech
标题Re: [讨论] 有关免疫的问题...
时间Sat Oct 25 21:30:02 2008
※ 引述《Nikio (我要出国!)》之铭言:
: ※ 引述《nidus (咕叽)》之铭言:
: : PAPER出处:
: : http://www.cell.com/content/article/abstract?uid=PIIS0092867408008210
: : 这篇作者利用 IL2 receptor gamma knockout NOD/SCID 为model
: : 使静脉注射到老鼠体内的human peripheral blood leukocytes(PBL)
: : 不会受到小鼠免疫排斥
: : 但是人类的leukocytes到小鼠体内
: : 难道不会对小鼠体内的各种组织器官进行免疫反应吗
: : 烦请好心的大大为不才解困 谢谢^^
: 不会反应,他实验方法也不是用i.v打
: Hu-HSC 打的是干细胞到胎鼠,被ANERGY掉或者被positive及negative selection後存活
: 因此不可能反应
: Hu-HSC mice were generated as described (Ishikawa et al., 2005).
: One- to two-day-old neonatal mice were irradiated (100 rads) and injected
: iv with T cell-depleted cord blood cells containing 3 × 104 CD34+ cells
: per mouse. Transplanted mice were tested for engraftment 12 weeks later
: as described above
: Hu-PBL mice有人证明过i.p打到老鼠内1~2月内都还是anergic状态
: (用i.p打造成,原因不明,但实验证实之方法)
: Recently, M. Tary-Lehmann and colleagues suggested that a
: human immune response occurs in hu-PBL-SCID mice within
: the first 2 to 3 weeks following PBL injection (31). Human
: lymphoid cells residing in these mice are mature (mainly CD41
: and CD81 cells), but the majority of these cells stain for
: CD45RO and behave as anergic cells 1 to 2 months after i.p.
: transplantation (29, 30).
: http://jvi.asm.org/cgi/reprint/70/11/7958
: 但老鼠直接i.v打人类的PBL就铁定会有排斥反应了
他这篇paper有用Hu-HSC和Hu-PBL两种模式
用Hu-HSC的话的确可以透过central tolerance来回避掉这个问题
至於Hu-PBL的话 该篇也提到会有XGVHD的问题
而且其实验结果也发现有XGVHD的现象(fig4b)
不过老鼠死活不是这篇的重点 重点在於人的CD4+T细胞存活量的比较
有加siRNA的组别会比没加的其CD4/CD3(CD4 T细胞在整体T细胞比例)会有明显增加
前面的推文是我没看完这篇paper
所以抱歉了
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1F:→ Nikio:是阿 排斥反应比HIV杀细胞来的慢多了 10/26 01:17