A Lymphoid Organ Specific Anti-Lipopolysaccharide Factor from Exhibits Strong Antimicrobial Activities

Overview

Journal Mar Drugs

Publisher MDPI

Specialties Biology
Pharmacology

Date 2021 Apr 30

PMID 33925052

Citations 3

Authors

Mingzhe Sun

Shihao Li

Xinjia Lv

Jianhai Xiang

Yuanan Lu

Fuhua Li

Affiliations

Soon will be listed here.

Abstract

Different shrimp species are known to possess apparent distinct resistance to different pathogens in aquaculture. However, the molecular mechanism underlying this finding still remains unknown. One kind of important antimicrobial peptides, anti-lipopolysaccharide factors (ALF), exhibit broad-spectrum antimicrobial activities. Here, we reported a newly identified ALF from the shrimp and compared the immune function with its counterpart in the shrimp . The ALF, designated as LvALF8, was specifically expressed in the lymphoid organ of . The expression level of was apparently changed after white spot syndrome virus (WSSV) or challenges. The synthetic LBD peptide of LvALF8 (LvALF8-LBD) showed strong antibacterial activities against most tested Gram-negative and Gram-positive bacteria. LvALF8-LBD could also inhibit the in vivo propagation of WSSV similar as FcALF8-LBD, the LBD of LvALF8 counterpart in . However, LvALF8-LBD and FcALF8-LBD exhibited apparently different antibacterial activity against , the main pathogen causing acute hepatopancreatic necrosis disease (AHPND) of affected shrimp. A structural analysis showed that the positive net charge and amphipathicity characteristics of LvALF8-LBD peptide were speculated as two important components for its enhanced antimicrobial activity compared to those of FcALF8-LBD. These new findings may not only provide some evidence to explain the distinct disease resistance among different shrimp species, but also lay out new research ground for the testing and development of LBD-originated antimicrobial peptides to control of shrimp diseases.

Citing Articles

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A Novel TRIM9 Protein Promotes NF-κB Activation Through Interacting With LvIMD in Shrimp During WSSV Infection.

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