Brown Fat Cell (IMAGE) The Ottawa Hospital Caption This is a photomicrograph of a brown fat cell (brown adipocyte) derived from a muscle stem cell that was induced by using an agent to reduce the amount of miR-133. Credit Alessandra Pasut, Ottawa Hospital Research Institute Usage Restrictions Open, with proper credit given License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.