Identification and Expression Profiles of IL-8 in Bighead Carp (Aristichthys Nobilis) in Response to Microcystin-LR

Overview

Journal Arch Environ Contam Toxicol

Specialty Environmental Health

Date 2013 Jun 26

PMID 23797979

Citations 6

Authors

Huiying Li

Yan Cai

Ping Xie

Guangyu Li

Le Hao

Qian Xiong

Affiliations

Soon will be listed here.

Abstract

Microcystin-LR (MCLR) is a widespread cyanotoxin and has immunotoxicity to animals, including fish. Chemokines are considered to play important roles in inflammatory response induced by MCLR. In this study, we cloned the full-length cDNA of interleukin-8 (IL-8) from bighead carp (Aristichthys nobilis) for the first time. The full-length IL-8 cDNA was 552 bp and contained a 297-bp open-reading frame that encoded for a 98-amino acid protein. The deduced IL-8 protein had a typical aspartic acid (D)-leucine (L)-arginine (R) and a CXC motif at the N-terminal, which were conserved in most fish species. Phylogenetic analysis showed that bighead carp IL-8 protein was grouped in the teleost IL-8 lineage 2. Under normal conditions, the expression of IL-8 is constitutive and weak in all tested tissues. However, MCLR treatment could significantly increase the transcription of IL-8 in bighead carp in a temporal- and dose-dependent pattern. The present study will help us to understand more about the evolution of IL-8 and its function in the MCLR induced proinflammatory response in bighead carp.

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