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  • Title: Tunicate cytokine-like molecules and their involvement in host defense responses.
    Author: Raftos D, Nair S.
    Journal: Prog Mol Subcell Biol; 2004; 34():165-82. PubMed ID: 14979668.
    Abstract:
    Tunicates (ascidians or sea squirts) are a large group of invertebrate chordates that are closely related to vertebrates. Their critical phylogenetic position has stimulated substantial interest in their host defense ("immune") responses. Whilst this interest has generated a wealth of knowledge regarding the humoral and cellular mechanisms that undertake defensive responses, there is less known about the regulation of those reactions. This chapter focuses on three cellular responses (cell proliferation, phagocytosis and chemotaxis) that are known to be regulated by cytophilic humoral molecules. Some of the humoral factors that affect these responses have functional and physicochemical similarities to vertebrate cytokines, like interleukin-1. However, the only regulatory molecules that have been characterized at a molecular level bear far greater similarity to C-type lectins or complement components.
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