Carcinogenesis, Teratogenesis & Mutagenesis

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Meta regression analysis of heavy metal toxicity on Caenorhabditis elegans

WANG Meng1,YU Xiao-jin1,*,MIN Jie1,LIU Ran2,TANG Meng2   

  1. (1. Department of Epidemiology and Biostatistics, School of Public Health, Southeast University, Nanjing 210009; 2. Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China)
  • Received:2013-01-10 Revised:2013-04-07 Online:2013-05-30 Published:2013-05-30
  • Contact: YU Xiao-jin, E-mail: xiaojinyu@seu.edu.cn

Abstract:

OBJECTIVE: Based on the published literature of heavy metal toxicity on Caenorhabditis elegans,and after controlling the effects of other factors,we analyzed and compared the toxicity of heavy metals on Caenorhabditis elegans. METHODS:We used Scan It software to extract data from 20 related literature which contained figures expressing different indices of toxicity of various heavy metals on Caenorhabditis elegans,we then built a Meta regression model using toxicity indices as the dependent variables,and different metals,concentration,exposure time,etc. as independent variables. RESULTS:The order of heavy metal on the mortality of Caenorhabditis elegans was:Mercury (Hg)>Copper (Cu)>Lead (Pb)>Chromium (Cr)>Aluminum (Al)>Cadmiun (Cd)>Cobalt (Co)>Nickel (Ni)>Zinc (Zn);affecting body size was:Pb>Silver (Ag)>Hg>Co>Al> Cr>Zn>Calcium (Ca)>Ni;the effect on general time was:Ni>Al>Co>Ag>Cr> Zn>Cu>Pb; with head thrashes was:Hg>Pb>Ni>Ag>Cu>Zn>Cr> Co>Cd>Al. CONCLUSION:Meta regression model could be used to integrate information on the toxicity of different heavy metals,and to sort them in order. However,more experimental data on sorting of toxicity is necessary to validate the toxicity of some metals.

Key words: meta regression, toxicity sorting of heavy metal, Caenorhabditis elegans