New research profiles mitochondrial circular RNAs in Peripheral Blood Mononuclear Cells (PBMCs) from young and old human cohorts and probes how mitochondrial circRNAs and the mitochondrial RNA-binding protein GRSF1 relate to mitochondrial metabolism and cellular senescence. The study was led by first author Hyejin Mun from the University of Oklahoma—with corresponding authors Je-Hyun Yoon from the University of Oklahoma and Young-Kook Kim from Chonnam National University Medical School— and is p...