Cytoplasmic Ig alpha serine/threonines fine-tune Ig alpha tyrosine phosphorylation and limit bone marrow plasma cell formation.

Cytoplasmic Ig alpha serine/threonines fine-tune Ig alpha tyrosine phosphorylation and limit bone marrow plasma cell formation.
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DOI:
10.4049/jimmunol.1101143
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发表时间:
2011-09-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Rajewsky K
Rajewsky K
中科院分区:
其他
文献类型:
--
作者:
Patterson HC;Kraus M;Wang D;Shahsafaei A;Henderson JM;Seagal J;Otipoby KL;Thai TH;Rajewsky K

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位于IGα免疫受体基于酪氨酸的激活基序(ITAM)附近的IGα丝氨酸191和197以及苏氨酸203抑制IGα ITAM酪氨酸磷酸化。我们发现,携带IGα S191、197和T203靶向突变的小鼠显示血清IgG 2c和IgG 2b浓度升高,骨髓中IgG 2c和IgG 2b分泌细胞数量增加。脾B细胞中BCR诱导的IGα酪氨酸磷酸化轻微增加。我们的研究结果表明,IGα丝氨酸/苏氨酸限制了分泌IgG 2c和IgG 2b的骨髓浆细胞的形成,可能是通过微调IGα酪氨酸介导的BCR信号传导。
Igα serine 191 and 197 and threonine 203, which are located in proximity of the Igα immunoreceptor tyrosine based activation motif (ITAM), dampen Igα ITAM tyrosine phosphorylation. Here we show that mice with targeted mutations of Igα S191, 197 and T203 displayed elevated serum IgG2c and IgG2b concentrations and had elevated numbers of IgG2c and IgG2b secreting cells in the bone marrow. BCR induced Igα tyrosine phosphorylation was slightly increased in splenic B cells. Our results suggest that Igα serine/threonines limit formation of IgG2c and IgG2b secreting bone marrow plasma cells, possibly by fine-tuning Igα tyrosine mediated BCR signaling.
DOI: 10.1084/jem.20060221
发表时间: 2006-07-10
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影响因子: --
作者:
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