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  • Title: Molecular characterization and expression of complement factor I in Pelteobagrus vachellii during Aeromonas hydrophila infection.
    Author: Qin C, Gong Q, Wen Z, Yuan D.
    Journal: Dev Comp Immunol; 2018 May; 82():66-71. PubMed ID: 29329952.
    Abstract:
    Complement factor I (CFI) is a novel regulatory serine protease that plays an important role in resistance to pathogen infection. In this study, the CFI gene of Pelteobagrus vachellii (Pv-CFI) was sequenced and characterized. The full-length cDNA of 2320 bp includes a 155 bp 5'-untranslated region (UTR), a 164 bp 3'-UTR, and a 2001 bp open reading frame (ORF) encoding a 667 amino acids. Multiple sequence alignment revealed five highly conserved domains with a typical modular architecture and identical active sites in vertebrates, indicating a conserved function. Pv-CFI mRNA was constitutively expressed in all examined tissues and most abundant in liver. During infection with Aeromonas hydrophila, Pv-CFI mRNA expression was significantly up-regulated in liver at 3-24 h, spleen at 3-48 h and head kidney at 3-48 h. The results suggest Pv-CFI plays an important role in resistance to pathogenic bacteria in P. vachellii.
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