Role of Myeloperoxidase of northern snakehead (Channa argus) in Aeromonas veronii infection

• Published in: Microbial pathogenesis Vol. 135; p. 103622
• Main Authors: Chen, Chong, Yang, Bintong, Abbas Raza, Sayed Haidar, Zhang, Dongxing, Wu, Tonglei, Zhang, Zhiqiang, Ullah, Irfan, Khan, Rajwali, Yang, Guilian, Wang, Chunfeng, Wang, Guiqin, Shan, Xiaofeng, Kang, Yuanhuan, Qian, Aidong
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.10.2019
• Subjects: Aeromonas veronii; Aeromonas veronii - pathogenicity; Animals; Base Sequence; Cloning, Molecular; DNA, Complementary; Expression analysis; Fish Diseases - microbiology; Fishes - genetics; Fishes - metabolism; Gene Expression; Gram-Negative Bacterial Infections - veterinary; Heart; Kidney - pathology; Liver - metabolism; MPO gene; Muscles - metabolism; Northern snakehead (Channa argus); Peroxidase - classification; Peroxidase - genetics; Peroxidase - physiology; Phylogeny; Spleen - metabolism; Expression analysis; Aeromonas veronii; MPO gene; Northern snakehead (Channa argus)
• ISSN: 0882-4010; 1096-1208
• DOI: 10.1016/j.micpath.2019.103622

Myeloperoxidase (MPO) is a ferrous lysosomal protein with many immune functions that belongs to the heme peroxidase enzyme. In this study, the functions of MPO in the northern snakehead (Channa argus) were investigated by cloning an MPO cDNA sequence with a full length of 3181 bp. Homology analysis showed that northern snakehead MPO gene had the highest (81%) homology with mandarin fish (Siniperca chuatsi). In healthy northern snakehead, the MPO gene was expressed in the head-kidney, kidney, heart, gill, spleen, liver, and muscles but not midgut. After the northern snakehead was infected with Aeromonas veronii, the MPO gene expression varied in different tissues with low level in spleen, liver, gill and muscle, fluctuated in kidney and head-kidney and showed high level in heart. The result indicated that MPO might play an important role in the antimicrobial immune response of the northern snakehead. •MPO cDNA of C.argus was cloned and analyzed firstly.•The expression of MPO gene in different tissues varied with sampling time.•First evidence of the immune defensive role of C.argus MPO in AV infection.