To provide novel means for preventing and/or treating mesothelioma by identifying and using miRNA that can inhibit the proliferation of mesothelioma cells.SOLUTION: Disclosed is an agent for preventing and/or treating mesothelioma comprising a nucleic acid being: (a) a nucleic acid comprising a nucleotide sequence of miR-1290 as set forth in SEQ ID NO:1; or (b) a nucleic acid comprising a nucleotide sequence having 70 percent or more, preferably 80 percent or more, more preferably 90 percent or more identity to the nucleotide sequence of (a) and having equal functions to those of miR-1290.SELECTED DRAWING: None

You do not currently have access to this content.