Tiny pieces of RNA called microRNAs that control gene expression play a key regulatory role in maintaining cholesterol levels, reported 2 independent research teams at New York University Langone Medical Center in New York City and Massachusetts General Hospital Cancer Center in Charlestown (Rayner KJ et al. Science. doi:10.1126/science.1189862 and Najafi-Shoushtari SH et al. Science. doi:10.1126/science.1189123 [both published online May 13, 2010]).
Friedrich MJ. Lipid Regulation. JAMA. 2010;304(1):32. doi:10.1001/jama.2010.864