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第59号(2004-12-10) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11173/1411

Title: マウス胸腺における抗体遺伝子の転写
Other Titles: Transcription of Immunoglobulin Genes in the Mouse Thymus
Authors: 池田, 江季
Ikeda, Eri
伊藤, 眞紀子
Ito, Makiko
今井, 由実
Imai, Yumi
木村, 望美
Kimura, Nozomi
中嶋, 真理
Nakashima, Mari
西川, 美絵
Nishikawa, Yosie
若林, 明日香
Wakabayashi, Asuka
宮田, 堅司
Miyata, Kenji
Issue Date: 10-Dec-2004
Publisher: 京都女子大学食物学会
Abstract: T and B cell developmental and functional status were investigated in the fetal and newborn mice. Interleukin (IL2) produced by activated T cells and immunoglobulin (Ig) heavy chain transcriptions were examined in thymus and spleen by RTPCR. In the 18 day embryo, T cells located in both organs because T cell receptor (3 chain (TCR (3) was transcribed. IL2 mRNA, however, was detected in the thymus, but little, if any, in the spleen of the embryonic stage. IL2 transcription was clearly observed in the spleen after birth. IgM heavy chain was transcribed both in the thymus and in the spleen of the embryo, and IgG3 and IgA were also done a little in the embryonic thymus. Because in aged thymus IgM, IgG3, IgA and IgE tran-scriptions could be clearly detected, the class-switching of heavy chain gene occurred in the thymus. Supernatant of primary cultured embryonic thymus cells for 48 hrs contained IgG3 and x chain of light chain. We conclude that lymphocytes in the embryonic thymus are already activated and able to interact with B cells of which Ig genes recombine the V domain for IgM, and that the class-switching of Ig heavy chain genes happen in the thymus. It should be clarified what antigens stimulate the thymus-cells to produce immunoglobulins, especially in embryo.
URI: http://hdl.handle.net/11173/1411
Appears in Collections:第59号(2004-12-10)

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