Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (3): 111-118.doi: 10.11978/2021109CSTR: 32234.14.2021109

• Marine Biology • Previous Articles     Next Articles

Molecular cloning and functional study of mitochondrial manganese superoxide dismutase in Macrobrachium rosenbergii

LI Yanan1(), LU Linqing1, ZHANG Peng2, QIN Zhendong1, LIN Li1, YAN Lei2()   

  1. 1. College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, Guangzhou 510222, China
    2. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
  • Received:2021-08-26 Revised:2021-11-04 Published:2021-11-09
  • Contact: YAN Lei E-mail:liyanan@zhku.edu.cn;yanlei@scsfri.ac.cn
  • Supported by:
    National Natural Science Foundation of China(42006115);Fund of Guangdong Provincial Key Laboratory of Fishery Ecology and Environment(FEEL-2021-10);Guangdong Provincial Rural Revitalization Strategy Special Fund(200-2018-XMZC-0001-107-0298)

Abstract:

Macrobrachium rosenbergii is one of the important shrimps for consumers in China. In recent years, bacterial diseases have occurred frequently and caused huge economic losses in M. rosenbergii aquaculture. Therefore, understanding its immune mechanism is essential to guide disease prevention and control. Mitochondrial manganese superoxide dismutase (mMnSOD) is considered to be the first line against oxidative stress, playing a vital role in innate immunity. However, the immune function of mMnSOD is still unclear. To this end, we cloned the mMnSOD of M. rosenbergii (MrmMnSOD), prepared its polyclonal antibodies, and analyzed its expression patterns under Aeromonas hydrophila infection. On the gene expression levels, MrmMnSOD reached a peak after 3- and 6-h infection in hepatopancreas and intestine tissue, respectively. Tissue immunofluorescence analysis showed that the maximum fluorescence intensity occurred at 12 h after infections in both hepatopancreas and intestine tissue. The above results indicated that MrmMnSOD is involved in the immune response against A. hydrophila. Further antibacterial assays showed that MrmMnSOD significantly inhibited the growth of Escherichia coli, A. hydrophila, Vibrio parahaemolyticus, Staphylococcus aureus, and Streptococcus agalactiae, suggesting that MrmMnSOD may belong to an immune-related molecule, which exerts immune function by antibacterial effect. These results enrich the basic theory in crustacean innate immunity, and provide a new target for disease control and drug research for M. rosenbergii breeding in the future.

Key words: Macrobrachium rosenbergii, SOD, expression pattern, antibacterial assay

CLC Number: 

  • S945.41