法国研究揭示部分脊椎动物肢体可再生机制

Core Insights - A recent study led by the French National Institute of Health and Medical Research has identified a specific cell population that may be central to the tissue regeneration mechanisms in vertebrates [1][2] - Unlike reptiles and amphibians, mammals have limited tissue regeneration capabilities, with previous research indicating that mouse embryos can regenerate limb buds around day 10 post-fertilization [1] - The study found that this regenerative ability is dependent on a type of cell derived from the neural crest, which plays a crucial role in early embryonic development [1][2] Group 1 - The research team observed that limb buds in mouse embryos began to regenerate within 24 hours after being removed at 10.5 days post-fertilization, but no regeneration occurred when the same experiment was conducted at 12.5 days [1] - Neural crest cells migrate to the damaged area within 3 hours post-amputation and participate in forming an embryonic mass, which is the starting point for regeneration [1] - The study revealed that specific marker genes that disappear after amputation are reactivated during the regeneration process, indicating a return to an early embryonic state [2] Group 2 - The findings suggest that neural crest cells may play a critical role in the regenerative capabilities of all vertebrates, providing insights into why adult mice lose regenerative abilities [2] - The research aims to enhance understanding of tissue regeneration, including in humans, and explores the potential for therapeutic reactivation of these mechanisms in the future [2]