Interleukin-2 and interferon-gamma double knockout mice reject heterotopic cardiac allografts.

Interleukin-2 and interferon-gamma double knockout mice reject heterotopic cardiac allografts.
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白细胞介素-2 和干扰素-γ 双敲除小鼠排斥异位心脏同种异体移植物。

DOI:
10.1097/00007890-200011150-00019
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发表时间:
2000
期刊:
影响因子:
6.2
通讯作者:
Strom,TB
Strom,TB
中科院分区:
医学2区
文献类型:
--
作者:
Zand,MS;Li,Y;Hancock,W;Li,XC;Roy-Chaudhury,P;Zheng,XX;Strom,TB

文献摘要

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背景。多项研究表明,MHC 不匹配的同种异体移植物会排斥 Th1 或 Th2 免疫反应,但这些模型均具有 Th1 细胞因子白细胞介素 (IL)-2 和干扰素-γ (IFN-γ) 的低水平表达。%方法。我们对 IL-2 和 IFN-γ 单靶向基因破坏的小鼠进行杂交,建立 IL-2+ IFN-γ 双敲除 (DKO) 小鼠。将来自 DBA/2j (H2 d) 供体的异位心脏同种异体移植物移植到 WT、IL-2 敲除 (KO)、IFN-γ KO 和 DKO 受者 (C57BL/6×129;H2 b)。通过逆转录聚合酶链反应分析同种异体移植物和 DKO 脾细胞的细胞因子转录物。结果。DKO 小鼠具有 Th2 偏差的细胞因子谱和 IgG1/IgG2a 同种型比率特征。 DKO 受体对异位心脏同种异体移植物的排斥速度比 IL-2 KO 小鼠更快,但明显慢于 WT 和 IFN-γ KO 小鼠(P < 0.01)。对排斥 DKO 受体的分析显示移植物内 Th2 细胞因子表达。结论。在 Th2 偏差的情况下联合缺乏 IL-2 和 IFN-γ 并不能防止同种异体移植排斥。
Background.Several studies suggest that MHC-mismatched allografts reject with a Th1 or Th2 immune response, but these models all have low-level expression of the Th1 cytokines interleukin (IL)-2 and interferon-γ (IFN-γ).%Methods.We interbred mice with single targeted gene disruptions for IL-2 and IFN-γ to establish IL-2+ IFN-γ double knockout (DKO) mice. Heterotopic cardiac allografts from DBA/2j (H2 d) donors were transplanted WT, IL-2 knockout (KO), IFN-γ KO, and DKO recipients (C57BL/6× 129; H2 b). Cytokine transcripts from allografts and DKO splenocytes were analyzed by reverse transcription polymerase chain reaction.Results.DKO mice had a cytokine profile and IgG1/IgG2a isotype ratio characteristic of Th2 deviation. DKO recipients rejected heterotopic cardiac allografts faster than IL-2 KO mice, but significantly slower than WT and IFN-γ KO mice (P< 0.01). Analysis of the rejecting DKO recipients showed intragraft Th2 cytokine expression.Conclusion.The combined absence of IL-2 and IFN-γ in the setting of Th2 deviation does not prevent allograft rejection.