A subpopulation of B220+ cells in murine bone marrow does not express CD19 and contains natural killer cell progenitors.

A subpopulation of B220+ cells in murine bone marrow does not express CD19 and contains natural killer cell progenitors.
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鼠骨髓中B220+细胞的亚群不会表达CD19,并且包含天然杀伤细胞的祖细胞。

DOI:
10.1084/jem.183.1.187
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发表时间:
1996-01-01
影响因子:
15.3
通讯作者:
Andersson, J
Andersson, J
中科院分区:
医学1区
文献类型:
--
作者:
Rolink, A;tenBoekel, E;Melchers, F;Fearon, DT;Krop, I;Andersson, J

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正常小鼠和重排缺陷小鼠的骨髓中都含有少量B220(CD45R)+细胞,这些细胞不表达B谱系标记物CD19。相反,该群体的一部分共表达表面标记CD43,缺乏或表达非常低水平的热稳定抗原(HSA)和BP-1,因此代表了B谱系发育的Hardy分数a (B220(+)-CD43+HSA-, BP-1-)的一部分。然而,这些B220(+)- cd19 -细胞中约有20-40%也共表达NK1.1表面分子,而不表达仅限于B细胞谱系的VpreB或B29基因。这些细胞在体外对重组白细胞介素2有反应,并发育成杀伤细胞,在缺乏主要组织相容性复合体I类分子表面表达的情况下,可以裂解原型NK靶肿瘤细胞YAC-1,以及同源正常脂多糖或刀头蛋白A原细胞。这些发现对B淋巴生成研究的意义进行了讨论。这表明cd19特异性单克隆抗体比B220(CD45R)在检测小鼠B系细胞方面更可靠。
Bone marrow of both normal and rearrangement-deficient mice contains a small population of B220(CD45R)+ cells, which do not express the B lineage marker CD19. Instead, part of this population coexpresses the surface marker CD43 and lacks or expresses very low levels of heat stable antigen (HSA) and BP-1, thus representing a part of Hardy's fraction A (B220(+)-CD43+HSA-, BP-1-) of B lineage development. However, some 20-40% of these B220(+)-CD19- cells also coexpress the NK1.1 surface molecule and do not express genes like VpreB or B29 restricted to the B cell lineage. These cells respond to recombinant interleukin 2 in vitro, and develop into killer cells that can lyse the prototypic NK target tumor cell, YAC-1, as well as syngeneic normal lipopolysaccharide or concanavalin A blasts, providing they lack the surface expression of major histocompatibility complex class I molecules. The implications of these findings for studies on B lymphopoiesis are discussed. It is suggested that the CD19-specific monoclonal antibody is more reliable, as in humans, than B220(CD45R) to detect B lineage cells in mice.
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