On the origins of the adaptive immune system: novel insights from invertebrates and cold-blooded vertebrates

by: Masanori Kasahara, Takashi Suzuki, Louis D Pasquier

Trends in Immunology, Vol. 25, No. 2. (February 2004), pp. 105-111.

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Abstract

When and how adaptive immunity emerged is one of the fundamental questions in immunology. Accumulated evidence suggests that the key components of adaptive immunity, rearranging receptor genes and the MHC, are unique to jawed vertebrates. Recent studies in protochordates, in particular, the draft genome sequence of the ascidian Ciona intestinalis, are providing important clues for understanding the origin of antigen receptors and the MHC. We discuss a group of newly identified protochordate genes along with some cold-blooded vertebrate genes, the ancestors of which might have provided key elements of antigen receptors. The organization of the proto-MHCs in protochordates provides convincing evidence that the MHC regions of jawed vertebrates emerged as a result of two rounds of chromosomal duplication.

@article{citeulike:1437968, abstract = {When and how adaptive immunity emerged is one of the fundamental questions in immunology. Accumulated evidence suggests that the key components of adaptive immunity, rearranging receptor genes and the MHC, are unique to jawed vertebrates. Recent studies in protochordates, in particular, the draft genome sequence of the ascidian Ciona intestinalis, are providing important clues for understanding the origin of antigen receptors and the MHC. We discuss a group of newly identified protochordate genes along with some cold-blooded vertebrate genes, the ancestors of which might have provided key elements of antigen receptors. The organization of the proto-MHCs in protochordates provides convincing evidence that the MHC regions of jawed vertebrates emerged as a result of two rounds of chromosomal duplication.}, author = {Kasahara, Masanori and Suzuki, Takashi and Pasquier, Louis D. }, citeulike-article-id = {1437968}, journal = {Trends in Immunology}, keywords = {immunology-basic}, month = {February}, number = {2}, pages = {105--111}, posted-at = {2007-07-05 16:49:20}, priority = {2}, title = {On the origins of the adaptive immune system: novel insights from invertebrates and cold-blooded vertebrates}, url = {http://www.sciencedirect.com/science/article/B6W7H-4B4PS3W-1/2/109fc5fe6e6333defb9a968648d3f72b}, volume = {25}, year = {2004} }

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TY - JOUR ID - citeulike:1437968 L3 - citeulike-article-id:1437968 TI - On the origins of the adaptive immune system: novel insights from invertebrates and cold-blooded vertebrates JF - Trends in Immunology VL - 25 IS - 2 SP - 105 EP - 111 N2 - When and how adaptive immunity emerged is one of the fundamental questions in immunology. Accumulated evidence suggests that the key components of adaptive immunity, rearranging receptor genes and the MHC, are unique to jawed vertebrates. Recent studies in protochordates, in particular, the draft genome sequence of the ascidian Ciona intestinalis, are providing important clues for understanding the origin of antigen receptors and the MHC. We discuss a group of newly identified protochordate genes along with some cold-blooded vertebrate genes, the ancestors of which might have provided key elements of antigen receptors. The organization of the proto-MHCs in protochordates provides convincing evidence that the MHC regions of jawed vertebrates emerged as a result of two rounds of chromosomal duplication. KW - immunology-basic AU - Kasahara, Masanori AU - Suzuki, Takashi AU - Pasquier, Louis PY - 2004/02// UR - http://www.sciencedirect.com/science/article/B6W7H-4B4PS3W-1/2/109fc5fe6e6333defb9a968648d3f72b ER -

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