Functional characterization of a mannose-binding lectin (MBL) from Nile tilapia (Oreochromis niloticus) in non-specific cell immunity and apoptosis in monocytes/macrophages. Issue 87 (April 2019)

• Record Type: Journal Article
• Authors: Mu, Liangliang; Yin, Xiaoxue; Yang, Yanjian; Wu, Liting; Wu, Hairong; Li, Bingxi; Guo, Zheng; Ye, Jianmin
• Is Part Of: Fish & shellfish immunology. Issue 87(2019)
• Page Start: 265
• Page End: 274
• Publication Date: 2019-04
• Subjects: Oreochromis niloticus -- MBL -- Inflammation -- Opsonization -- Apoptosis -- Monocytes/macrophages; Fishes -- Immunology -- Periodicals; Shellfish -- Immunology -- Periodicals; Poissons -- Immunologie -- Périodiques; Crustacés -- Immunologie -- Périodiques; 571.9617
• DOI: 10.1016/j.fsi.2019.01.019
• Languages: English
• ISSNs: 1050-4648

Abstract

Abstract: Mannose-binding lectin (MBL), a soluble pattern recognition receptor, is able to recognize antigen and participate in non-specific cell immunity, such as regulation of inflammation, migration, opsonization, phagocytosis and killing, which plays an important role in innate immunity. In this study, we have investigated the contributing mechanisms and effects of MBL on the cell immunity of Nile tilapia ( Oreochromis niloticus ) monocytes/macrophages. The mRNA expression level of OnMBL was significantly up-regulated in monocytes/macrophages after in vitro bacterial infection ( Streptococcus agalactiae and Aeromonas hydrophila ). Recombinant OnMBL ((r)OnMBL) protein could participate in the regulation of inflammation, migration, and enhancement of phagocytosis and respiratory burst activity in monocytes/macrophages. Moreover, the (r)OnMBL could induce the apoptosis of monocytes/macrophages. Taken together, the results of this study indicated that OnMBL is likely to involve in immune regulation, which may play an important role in host defense of innate immunity in Nile tilapia. Highlights: The OnMBL expression was significantly up-regulated following challenges with Streptococcus galactiae and Aeromonas hydrophila ( in vitro ). Recombinant OnMBL could participate in the regulation of inflammatory and migration reaction. Recombinant OnMBL was able to enhance phagocytosis and respiratory burst activity in monocytes/macrophages. Recombinant OnMBL could induce the apoptosis of monocytes/macrophages.