Serum amyloid A in marine bivalves: an acute phase and innate immunity protein

Serum amyloid A (SAA) is among the most potent acute phase proteins (APP) in vertebrates. After injury, its early expression can dramatically increase to promote the recruitment of immuno-competent cells, expression of pro-inflammatory proteins and the activation of the innate immune defences. Altho...

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Bibliographic Details
Published in:Developmental & Comparative Immunology
Main Authors: ROSANI, UMBERTO, DOMENEGHETTI, STEFANIA, FRANZOI, MARCO, VENIER, PAOLA, Gerdol M, Pallavicini A
Other Authors: Rosani, Umberto, Domeneghetti, Stefania, Gerdol, M, Franzoi, Marco, Pallavicini, A, Venier, Paola
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2016
Subjects:
SAA
bivalves
immunity
protostomes
Crassostrea gigas
Online Access:http://hdl.handle.net/11577/3177532
https://doi.org/10.1016/j.dci.2016.01.019
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Summary:Serum amyloid A (SAA) is among the most potent acute phase proteins (APP) in vertebrates. After injury, its early expression can dramatically increase to promote the recruitment of immuno-competent cells, expression of pro-inflammatory proteins and the activation of the innate immune defences. Although APP have been studied in many vertebrates, only recently their search was extended to invertebrates and the finding of SAA-like molecules has opened new questions on the immune-regulatory functions of these soluble proteins in the animal kingdom. Taking advantage of the considerable amount of genomic and transcriptomic data currently available, we retrieved 51 SAA-like proteins in several protostome taxa comprising 21 marine bivalve species and basal metazoans. In addition to vertebrate-like SAAs, we identified a second protein type with peculiar features. In the bivalves Crassostrea gigas and Mytilus galloprovincialis, both digital expression analysis and qPCR data indicated an induction of the classical SAA after bacterial challenge.

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