The role of translation in keratinocyte cell fate determination.

The study explored the role of protein translation in determining the fate of human keratinocyte colonies, which are crucial for maintaining and repairing the mammalian epidermis. It was found that keratinocyte colonies could be categorized as 'balanced' or 'expanding' based on their proliferation patterns. The research demonstrated that these colonies exhibit distinct transcriptional and translational profiles early in their growth, suggesting that their fate is predetermined. By using RNA interference to knock down a specific Eukaryotic translation initiation factor, researchers observed a switch in the colony's proliferative potential, indicating that translation levels might actively determine cell fate rather than merely marking differentiation. These findings advanced the understanding of progenitor fate determination and could provide insights into epidermal homeostasis, tissue repair, and cancer.