Towards Mammalian Limb Regeneration

描述（由申请人提供）：再生医学的进步为截肢者的治疗提供了巨大的潜力。然而，尽管人们对模型系统（例如蝾螈肢体再生）中再生反应的分子机制有了越来越多的了解，但将这些知识应用于哺乳动物系统还很落后。为了最终达到诱导哺乳动物肢体再生的目的，我们建议将最近对蝾螈肢体再生过程中形成的伤口表皮的研究结果应用于非再生系统，即小鼠手指截肢伤口。具体来说，我们假设在再生蝾螈肢体中发现的这些基因和microrna的小鼠同源物在异位表达时可以启动哺乳动物的再生。如果成功，从这些前所未有的研究中获得的基础知识将对组织修复，伤口愈合和比较发育生物学产生重大影响。为今后人体肢体再生的临床应用奠定基础。

DESCRIPTION (provided by applicant): Advances in regenerative medicine offer great potential for the treatment of limb amputees. However, despite an increasing understanding of the molecular mechanisms underlying regenerative responses in model systems (e.g., salamander limb regeneration), the application of this knowledge to mammalian systems is lagging. With the ultimate goal of inducing mammalian limb regeneration, we propose here to apply the results gained from recent studies on the wound epidermis formed during salamander limb regeneration to a non-regenerative system, i.e., mouse digit amputation wounds. Specifically, we hypothesize that the murine orthologs of those genes and microRNAs identified in regenerating salamander limbs can initiate mammalian regeneration when ectopically expressed. If successful, the basic knowledge gained from these unprecedented studies will have a significant impact on tissue repair, wound healing and comparative developmental biology. Moreover, this work will provide the foundation for future human limb regeneration clinical applications. PUBLIC HEALTH RELEVANCE: Advances in regenerative medicine offer great potential for the treatment of limb amputees. However, despite an increasing understanding of the molecular mechanisms underlying regenerative responses in model systems (e.g., salamander limb regeneration), the application of this knowledge to mammalian systems is lagging. With the ultimate goal of inducing mammalian limb regeneration, we propose here to apply the results gained from recent studies on the wound epidermis formed during salamander limb regeneration to a non-regenerative system, i.e., mouse digit amputation wounds.