Mold theory - Setsu Igata

Japanese: 鋳型説 - いがたせつ
Mold theory - Setsu Igata

... The main points of this theory are that (1) cells (i.e. clones) that react specifically to antigens are randomly generated in the early stages of individual development (embryonic or neonatal), (2) clones that respond to self-antigens are inhibited (eliminated), and only clones that respond to foreign antigens remain, and (3) when a foreign antigen invades the body, it selects a specific clone and causes that cell to proliferate. This theory can explain many immune phenomena better than the previously proposed template theory (the theory that specific antibody proteins are synthesized using antigens as templates), and has made a great contribution to the development of modern immunology. Based on various experimental facts that have been proposed since then, it is still accepted by immunologists today as a fundamentally correct theory. ...

*Some of the terminology that refers to the "mold theory" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… この説の骨子は,(1)個体発生の初期(胎生期ないし新生期)に抗原に特異的に反応する細胞(すなわちクローン)がランダムに生じる,(2)そのなかから自己抗原に対応したクローンは禁止(消去)されるので外来抗原に対応したクローンのみが存在するようになる,(3)外来抗原は生体に侵入したとき特異的クローンを選択してその細胞を増殖させる,というものである。この説は,それ以前に提唱された鋳型説(抗原が鋳型となって特異的抗体タンパク質が合成されるとする説)に比して多くの免疫現象がうまく説明でき,近代免疫学の発展に多大の貢献をした。その後のさまざまな実験事実からも今日でも基本的に正しい理論として免疫学者に受け入れられている。…

※「鋳型説」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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