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Front Immunol. 2017 Oct 26;8:1379. doi: 10.3389/fimmu.2017.01379. eCollection 2017.

Vertebrate Adaptive Immunity-Comparative Insights from a Teleost Model.

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1
Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, United States.

Abstract

The channel catfish (Ictalurus punctatus) and the ciliated protozoan parasite Ichthyophthirius multifiliis are used to study pathogen-specific protective immunity. In this review, we briefly describe this host-parasite system and discuss the comparative insights it provides on the adaptive immune response of vertebrates. We include studies related to cutaneous mucosal immunity, B cell memory responses, and analyses of αβ T cell receptor (TCR) repertoires. This host-parasite model has played an important role in elucidating host protective responses to parasite invasion and for comparative studies of vertebrate immunity. Recent findings from bioinformatics analyses of TCR β repertoires suggest that channel catfish preferentially expand specific clonotypes that are stably integrated in the genome. This finding could have broad implications related to diversity in lymphocyte receptors of early vertebrates.

KEYWORDS:

Ichthyophthirius multifiliis; T cell repertoire; adaptive immunity; channel catfish; immune memory; teleost

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