翻訳と辞書 Words near each other ・ Plasmodium atheruri ・ Plasmodium attenuatum ・ Plasmodium audaciosum ・ Plasmodium aurulentum ・ Plasmodium australis ・ Plasmodium azurophilum ・ Plasmodium balli ・ Plasma Acoustic Shield System ・ Plasma activation ・ Plasma actuator ・ Plasma afterglow ・ Plasma antenna ・ Plasma arc welding ・ Plasma ashing ・ Plasma cannon ・ Plasma cell ・ Plasma cell dyscrasia ・ Plasma cell gingivitis ・ Plasma cell granuloma ・ Plasma cell leukemia ・ Plasma channel ・ Plasma cleaning ・ Plasma contactor ・ Plasma containment ・ Plasma cosmology ・ Plasma cutting ・ Plasma deep drilling technology ・ Plasma diagnostics ・ Plasma diffusion ・ Plasma display Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Plasma cell ： ウィキペディア英語版 Plasma cell Plasma cells, also called plasma B cells, plasmocytes, plasmacytes, or effector B cells, are white blood cells that secrete large volumes of antibodies. They are transported by the blood plasma and the lymphatic system. Like all blood cells, plasma cells originate in the bone marrow; B cells differentiate into plasma cells that produce antibody molecules closely modeled after the receptors of the precursor B cell. Once released into the blood and lymph, these antibody molecules bind to the target antigen (foreign substance) and initiate its neutralization or destruction.〔http://global.britannica.com/EBchecked/topic/463540/plasma-cell〕 == Development == After leaving the bone marrow, the B cell acts as an antigen presenting cell (AP-C) and internalizes offending antigens, which are taken up by the B cell through receptor-mediated endocytosis and processed. Pieces of the antigen (which are now known as ''antigenic peptides'') are loaded onto MHC II molecules, and presented on its extracellular surface to CD4+ T cells (sometimes called ''T helper cells''). These T cells bind to the MHC II-antigen molecule and cause activation of the B cell. Upon stimulation by a T cell, which usually occurs in germinal centers of secondary lymphoid organs like the spleen and lymph nodes, the activated B cell begins to differentiate into more specialized cells. Germinal center B cells may differentiate into memory B cells or plasma cells. The mechanism by which a B cell becomes one or the other of these is a process known as affinity maturation. Most of these B cells will become plasmablasts (or "immature plasma cells"), and eventually plasma cells, and begin producing large volumes of antibodies. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Plasma cell」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.