Brain Tumor Cells (IMAGE) Dartmouth Health Caption Brain tumor cells after treatment with Y100, which causes depolarization of mitochondria and the appearance of mitochondrial 'hot spots' (red). Credit Yolanda Sanchez Usage Restrictions With permission from Yolanda Sanchez (Yolanda.Sanchez@dartmouth.edu). 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.