Journal of Tropical Oceanography ›› 2017, Vol. 36 ›› Issue (5): 40-48.doi: 10.11978/2016126CSTR: 32234.14.2016126

• Orginal Article • Previous Articles     Next Articles

Proteomic responses of marine medaka (Oryzias melastigma) to chronic high environment ammonia exposure

Na GAO1,2,3(), Limei ZHU1,2, Deliang YU3,4, Li ZHANG1,2()   

  1. 1. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    2. Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    3. University of Chinese Academy Sciences, Beijing 100049, China
    4. Key Laboratory of Coastal Zone Environmental Processes and Ecological Restoration, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai 264003, China
  • Received:2016-12-02 Revised:2017-04-21 Online:2017-09-20 Published:2017-09-22
  • About author:

    Author:QIU Chunhua.E-mail: qiuchh3@mail. sysu.edu.cn

  • Supported by:
    State Key Development Program for Basic Research of China (2015CB452904);National Natural Science Foundation of China (41376161, 31501862);100 Talents Program of the Chinese Academy of Sciences to ZHANG Li;Science and Technology Planning Project of Guangdong Province, China (2014B030301064).

Abstract:

Abstract: Most teleost fish excretes nitrogen waste as ammonia, but high environment ammonia is toxic to fish. In this study, we demonstrated that the death rate of marine medaka Oryzias melastigma exposed to 0.6 and 1.1 mmol·L-1 NH4Cl for four weeks were 21.25% and 40.00%, respectively, suggesting high environment ammonia is toxic to the fish. Besides, the higher concentration the ambient ammonia, the more toxic it is to the fish. We investigated the responses of chronic ammonia exposure in marine medaka using proteomics. Sixteen proteins were found to be remarkably altered in the fish exposed to 0.6 mmol·L-1 NH4Cl and seven proteins, in the fish exposed to 1.1 mmol·L-1 NH4Cl. The function of these proteins included inducing oxidative stress, neurotoxicity, disturbance in cell structure, muscle contraction, visual pathway, metabolic and immunological regulation. This is the first report of studying the toxicological effect of ammonia on marine medaka using proteomics. It provides important insights into toxicological effects of environmental contaminant using proteomics.

Key words: chronic ammonia exposure, proteomic, marine medaka, toxicological effect