Effects of cyanobacterial toxin microcystin-LR on the transcription levels of immune-related genes in grass carp Ctenopharyngodon idella

  • Lili Wei
  • Baojian Sun
  • MingXian Chang
  • Yi Liu
  • Pin Nie
Article

Abstract

Recent studies in mammals have revealed that the cyanobacterial toxin MC-LR suppresses immune functions. Nevertheless, immunotoxic effects of microcystins have been little studied in fish. In this paper, we present the profiles of the immune modulation of MC-LR in grass carp, and quantitative real-time PCR methodology was developed for the measurement of relative transcription changes of six immune-related genes in the spleen and head kidney of the grass carp Ctenopharyngodon idella, which were intraperitoneally injected with 50 μg MC-LR·kg-1 body weight in a three-week period. This study was focused exclusively on gene transcription level changes at different time points after MC-LR exposure, so, only one dose was given. The investigated genes were interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), type I interferon (Type I IFN), peptidoglycan recognition protein-L (PGRP-L), immunoglobulin M (IgM) and major histocompatibility complex class I (MHC-I) genes. The results demonstrated that the transcription levels of the TNF-α, type I IFN, and PGRP-L genes in the spleen and head kidney were significantly low at all time points, and those of IL-1β were significantly low in the head kidney at different time points. In addition, IgM and MHC-I transcription levels were only significantly low in the spleen and head kidney at 21 d postinjection. The changes in the transcription levels of immune-related genes induced by MC-LR confirmed its effect on inhibiting immune function at the transcription level.

Keywords

Grass carp Immune-relate genes Microcystin-LR Immunotoxicity Quantitative real-time PCR 

Notes

Acknowledgement

This study was supported by the National Natural Science Foundation of China (project no. 20577065).

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Lili Wei
    • 1
    • 2
  • Baojian Sun
    • 1
  • MingXian Chang
    • 1
  • Yi Liu
    • 1
  • Pin Nie
    • 1
  1. 1.State Key Laboratory of Freshwater Ecology and Biotechnology, and Laboratory of Fish Diseases, Institute of HydrobiologyChinese Academy of SciencesWuhanChina
  2. 2.College of Animal Science and TechnologyJiangxi Agricultural UniversityNanchangChina

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