Epigenetic Regulation of Skin Regeneration

总结 伤口愈合不良造成了世界范围内的巨大发病率和财政负担。年龄老化 皮肤是有缺陷的伤口愈合的基础，尽管关于伤口愈合的根本原因知之甚少。 这个协会。然而，令人信服的数据表明，随着年龄的增长，皮肤干细胞变得缺乏， 伤口愈合不良的基础。此外，可逆的表观遗传调控在干细胞中起着关键作用， 健康和维护。因此，我们认为皮肤再生愈合的基本基础 存在于皮肤干细胞的表观遗传调节中。在这里，我们建议研究皮肤的表观遗传变化， 再生的伤口愈合和老化，并测试一种新发现的形式，在体内表观遗传 我们预测的重新编程将逆转衰老并恢复衰老干细胞的功能。因此 该项目的主要目标是阐明皮肤干细胞调控的表观遗传机制， DNA甲基化/羟甲基化和组蛋白修饰，并开发新的和实用的 翻译方法来重编程年龄相关的干细胞表观遗传异常。我们有 组建了一个跨学科的研究团队，他们在该领域有着开创性的发现历史， 衰老生物学、表观遗传学、表观遗传重编程、皮肤干细胞生物学、皮肤病理学和 生物标志物应用。我们还开发了包含可生物降解伤口的实验模型 愈合支架开发，人类皮肤异种移植，三维生物打印和小鼠 表观遗传诱导的过早衰老模型。因此，我们将利用多个协同点，经验， 和协作互动，以解决与年龄相关的伤口愈合的复杂和临床重要问题， 缺陷最重要的是，我们将在我们的研究中定义和测试表观遗传重编程的治疗效果。 新的和互补的临床前模型系统。这一建议提出了一种新的方法，表观遗传 重新编程功能缺陷的衰老干细胞以增强皮肤再生以治愈慢性病 老百姓的伤口。如果成功，这种方法可能会改变我们对老龄化的看法 过程和治疗与年龄有关的皮肤病。

SUMMARY Defective wound healing accounts for enormous morbidity and fiscal burden worldwide. Chronological aging of skin is at the foundation of defective wound healing, although little is known regarding the underlying cause of this association. However compelling data indicates that skin stem cells that become deficient as we age are the basis for defective wound healing. Moreover, reversible epigenetic regulation plays a critical role in stem cell health and maintenance. We therefore posit that the fundamental underpinnings of regenerative healing of skin reside in the epigenetic regulation of skin stem cells. Here, we propose to study epigenetic changes in skin regeneration in wound healing and aging, and test a newly discovered form of in vivo epigenetic reprogramming that we predict will reverse the age and restore function to aging stem cells. Thus, the primary goal of this project is to elucidate epigenetic mechanisms of skin stem cell regulation with focus on DNA methylation/hydroxymethylation and histone modification, and to develop novel and practical translational approaches to reprogramming age-related stem cell epigenetic aberrances. We have assembled a synergistic interdisciplinary team of investigators with a history of pioneering discovery in the areas of aging biology, epigenetics, epigenetic reprogramming, skin stem cell biology, dermatopathology and biomarker application. We also have developed experimental models that encompass biodegradable wound healing scaffold development, human skin xenotransplantation, three-dimensional bioprinting, and a mouse model of epigenetically inducible premature aging. Thus, we will leverage multiple points of synergy, experience, and collaborative interaction to tackle the complex and clinically important questions of age-related wound healing deficiency. Most importantly, we will define and test the therapeutic effects of epigenetic reprogramming in our novel and complementary pre-clinical model systems. This proposal presents a new approach of epigenetic reprogramming of functionally deficient aging stem cells to enhance skin regeneration in order to heal chronic wounds in the aging populace. If successful, such an approach could transform the way we think about the aging process and treating age-related skin disorders.