[Recent research progress on natural medicines in treatment of cadmium toxicity].

Cadmium contamination of environment is a subject of serious international concern. Bioaccumulation of cadmium occurs primarily through ingestion of contaminated water and food. Cadmium poisoning came into prominence with the "itai-itai" disease event in Japan in the 1950s. It could also cause damages to liver, kidney, lung and other organs. Thus, the treatment of cadmium poisoning has become a research hotspot. Researchers are trying their best to explore prophylactic and therapeutic medicines for prevention and treatment of cadmium-induced poisoning. So far, chelation therapy, the conventional treatment for heavy metal toxicity, is reported to have a number of safety and efficacy issues. Natural medicines have a variety of advantages such as extensive sources, high safety, less adverse reactions, and thus have great potentials in treating cadmium poisoning. In this review, the progress in the antagonistic effects of natural drugs in cadmium poisoning and their therapeutic mechanisms were summarized in order to provide certain references for the future development and in-depth study of antagonistic substances.