A C-type lectin (CL11X1-like) from Nile tilapia (Oreochromis niloticus) is involved in host defense against bacterial infection

Developmental and Comparative Immunology
Liangliang MuJianmin Ye

Abstract

Collectins, a subfamily of the C-type lectins, are able to bind non-self glycoconjugates on the surface of microorganisms and inhibit infection by direct neutralization, agglutination and/or opsonization, which play important roles in innate immunity. In this study, a CL11X1-like collectin (OnCL11X1) was identified from Nile tilapia (Oreochromis niloticus) and characterized at expression and agglutination functional levels. The open reading frame of OnCL11X1 is 840 bp of nucleotide sequence encoding polypeptides of 279 amino acids. The deduced amino acid sequence is highly homology to teleost and similar to mammalian CL11X1, containing a canonical collagen-like region, a carbohydrate recognition domain and a neck region. Expression analysis revealed that the OnCL11X1 was highly expressed in the liver, and widely exhibited in other tissues including kidney, intestines and spleen. In addition, the OnCL11X1 expression was significantly up-regulated in spleen and anterior kidney following challenges with a Gram-positive bacterial pathogen (Streptococcus agalactiae) and a Gram-negative bacterial pathogen (Aeromonas hydrophila). The up-regulation of OnCL11X1 expression was also demonstrated in hepatocytes and macrophages in vitro sti...Continue Reading

Citations

Sep 15, 2020·Journal of Fish Diseases·Xiao-Wen ZhangXiao-Hua Xia
Jul 18, 2020·Frontiers in Immunology·Jinzhong NiuJichang Jian
Feb 12, 2021·Veterinary Immunology and Immunopathology·Ying HuangZhe Zhao

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