Collective Heterogeneity of Mitochondrial Potential in Contact Inhibition of Proliferation

The study explores the metabolic heterogeneity in epithelial cells during contact inhibition of proliferation (CIP), focusing on mitochondrial membrane potential (ΔΨM). It identifies three stages of CIP, with stage 2 exhibiting significant collective heterogeneity in ΔΨM, influenced by local cell density and geometric factors rather than biochemical factors. This heterogeneity correlates with cell proliferation capacity and is linked to cell mechanics, particularly actomyosin contractility. The research highlights the importance of metabolic changes in understanding CIP and suggests implications for epithelial tissue function and development, including potential insights into pattern formation in multicellular organisms like hair follicle distribution.