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Molecular cloning and functional characterization of cyclophilin A in yellow catfish (Pelteobagrus fulvidraco)



Molecular cloning and functional characterization of cyclophilin A in yellow catfish (Pelteobagrus fulvidraco)



Fish and Shellfish Immunology 45(2): 422-430



Cyclophilin A (CypA) is a ubiquitously expressed protein which involves in diverse pathological conditions including infection and inflammation. In this report, a CypA gene (designated as YC-CypA) was cloned from yellow catfish (Pelteobagrus fulvidraco) which is an important cultured fish species in Asian countries. The open reading frame (ORF) of YC-CypA encoded a polypeptide of 164 amino acids with calculated molecular weight of 17.70 kDa. The deduced amino acid sequences of the YC-CypA shared highly conserved structures with CypAs from the other species, indicating that YC-CypA should be a new member of the CypA family. Full-length YC-CypA protein was expressed in Escherichia coli and specific polyclonal antibody against YC-CypA was generated. The YC-CypA protein showed chemotactic activity by transwell migration assay. The mRNA and protein of YC-CypA could be detected in all examined tissues with relatively higher mRNA level in spleen and higher protein level in head kidney, respectively. The temporal expression patterns of YC-CypA, IL-1β and TNF-α mRNAs were analyzed in the liver, spleen and head kidney post of Edwardsiella ictaluri infection. By immunohistochemistry assay, slight enhancement of YC-CypA protein was observed in the liver, spleen, body kidney and head kidney of yellow catfish infected with E. ictaluri. In conclusion, YC-CypA of yellow catfish showed chemotactic activity in vitro and might have been involved in cytokines secretion in yellow catfish during the infection of E. ictaluri.

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Accession: 058339160

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PMID: 25882636

DOI: 10.1016/j.fsi.2015.04.002


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