Acquisition of Ly49 receptor expression by developing natural killer cells.

Acquisition of Ly49 receptor expression by developing natural killer cells.
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DOI:
10.1084/jem.187.4.609
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发表时间:
1998-02-16
影响因子:
15.3
通讯作者:
Raulet, DH
Raulet, DH
中科院分区:
医学1区
文献类型:
--
作者:
Dorfman, JR;Raulet, DH

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通过确定Ly 49受体表达的发育模式,研究了小鼠自然杀伤(NK)细胞主要组织相容性复合体(MHC)I类分子受体库的形成。在出生后的第一天,很少或没有脾NK细胞表达Ly 49 A,Ly 49 C,Ly 49 G2或Ly 49 I受体。Ly 49+脾NK细胞的比例在生命的前6-8周逐渐上升到成人水平。脾Ly 49 + NK细胞的明显数量的出现与NK活性的出现在3-4周时一致。体内转移后,不表达特异性Ly 49受体的NK细胞可以产生表达特异性Ly 49受体的NK细胞,而表达这四种Ly 49受体之一的细胞可以产生表达其他受体的细胞。一旦启动,Ly 49受体的表达在体内转移后稳定至少10天。因此,Ly 49受体表达的起始连续发生。有趣的是,在体内转移Ly 49 A −细胞后,所测试的受体之一Ly 49 A的表达并没有发生。对这些数据的一个可能的解释是NK细胞表达Ly 49受体的顺序是非随机的。结果为评估NK细胞库形成模型以及宿主I类MHC分子如何塑造库提供了框架。
The formation of the repertoire of mouse natural killer (NK) cell receptors for major histocompatibility complex (MHC) class I molecules was investigated by determining the developmental pattern of Ly49 receptor expression. During the first days after birth, few or no splenic NK cells express Ly49A, Ly49C, Ly49G2, or Ly49I receptors. The proportion of Ly49+ splenic NK cells gradually rises to adult levels during the first 6–8 wk of life. The appearance of appreciable numbers of splenic Ly49+ NK cells coincides with the appearance of NK activity at 3–4 wk. After in vivo transfer, NK cells not expressing specific Ly49 receptors can give rise to NK cells that do, and cells expressing one of these four Ly49 receptors can give rise to cells expressing others. Once initiated, expression of a Ly49 receptor is stable for at least 10 d after in vivo transfer. Hence, initiation of Ly49 receptor expression occurs successively. Interestingly, expression of one of the receptors tested, Ly49A, did not occur after in vivo transfer of Ly49A− cells. One possible explanation for these data is that the order of Ly49 receptor expression by NK cells is nonrandom. The results provide a framework for evaluating models of NK cell repertoire formation, and how the repertoire is molded by host class I MHC molecules.
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发表时间: 1996-12-01
影响因子: 15.3
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