کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3805991 | 1245249 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Linfocitos B
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کلمات کلیدی
موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
پزشکی و دندانپزشکی (عمومی)
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چکیده انگلیسی
The B-cell antigen receptors (BCR) make it possible to recognize and respond to the antigens, initiating a program of proliferation and differentiation in immunoglobulin secreting plasma B cells or antibodies, which are secreted forms of BCR that neutralize the pathogen. The BCR also permits the memory B cell to be reactivated by the antigen in the secondary or recall immune responses. The B cells integrate the information received through the BCR with that of other co-receptors and receptors of co-stimulators and inhibitors, to produce different types of cell responses. These include deletion, activation, proliferation and cellular differentiation. B cells are developed in the bone marrow. Their precursors rearrange the genes that code for the heavy and light chain of the BCR. Once the B cell produces its antigen receptor, if it is auto-reactive, the reprogramming or negative selection of the cell it produces occurs. The B cells mature in the periphery and can recognize antigens in the secondary lymphoid organs, proliferate and differentiate into the antibody secreting plasma cells. There are several populations of mature B cells that respond differently to the antigens. Splenic marginal zone B1 cells and B cells (MZ B cells) respond in an thymus-independent antibody way, producing IgM. The follicular B cells (FO B cells) produce antibodies in a thymus-dependent antibody way with changed isotypes and having high affinity for the antigen. They differentiate in long-lived plasma cells and memory B cells that maintain our humoral immunity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medicine - Programa de Formación Médica Continuada Acreditado - Volume 11, Issue 28, March 2013, Pages 1710-1719
Journal: Medicine - Programa de Formación Médica Continuada Acreditado - Volume 11, Issue 28, March 2013, Pages 1710-1719
نویسندگان
A. Prieto MartÃn, J. Barbarroja Escudero, C. GarcÃa Torrijos, J. Monserrat Sanz,