Methylmercury is a well-known environmental pollutant that causes serious disorders of the central nervous system as well as a range of other symptoms. We employed small interfering RNA (siRNA) to search for factors in ligand-dependent signal transduction pathways that may be involved in the development of methylmercury toxicity. Melanocortin 2 receptor accessory protein 2 (MRAP2) is involved in the melanocortin pathway. Using siRNA, we found that decreased expression of MRAP2 conferred strong methylmercury resistance in HEK293 cells.
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