Antibacterial Activity of Rainbow Trout Plasma: In Vitro Assays and Proteomic Analysis

Overview

Journal Animals (Basel)

Date 2023 Nov 25

PMID 38003182

Authors

Toita Mizaeva

Kalimat Alieva

Eldar Zulkarneev

Stanislav Kurpe

Kseniya Isakova

Svetlana Matrosova

Ekaterina Borvinskaya

Irina Sukhovskaya

Affiliations

Soon will be listed here.

Abstract

The objective of this study was to investigate the bactericidal activity of blood plasma from cultured rainbow trout obtained from two different fish farms. Plasma from trout naturally infected with the bacterial pathogen was found to inhibit the growth of in vitro. Incubation of in bacteriostatic trout plasma resulted in agglutination and growth retardation, without causing massive damage to the cell membrane. The proteome of the plasma with high antimicrobial activity revealed an abundance of high-density apolipoproteins, some isoforms of immunoglobulins, complement components C1q and C4, coagulation factors, lectins, periostin, and hemoglobin. Analysis of trout proteins retained on cells revealed the presence of fish immunoglobulins, lectins, and complement components on bacteria whose growth was inhibited, although the native membrane attack complex of immunised trout plasma did not assemble effectively, resulting in a weak bactericidal effect. Furthermore, this study examined the bacterial response to trout plasma and suggested that the protein synthesis pathway was the target of antimicrobial proteins from fish blood. Taken together, these findings illustrate the advantages of the affinity approach for understanding the role of plasma proteins in host defence against pathogens.

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