Roadmap for Intestinal Regeneration

肠道再生路线图

基本信息

批准号：
10579421
负责人：
JOSE E GARCIA-ARRARAS
金额：
$ 44.7万
依托单位：
UNIVERSITY OF PUERTO RICO RIO PIEDRAS
依托单位国家：
美国
项目类别：
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2025-08-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10579421
关键词：
Address Affect Amaze American Animal Model Animals Attention Biological Models Biology Candidate Disease Gene Cells Cellular biology Characteristics Chromosome Mapping Complex Data Development Digestive System Disorders Disease Echinodermata Epithelial Event Extracellular Matrix Funding Ganglia Gastrointestinal Surgical Procedures Gastrointestinal tract structure Gene Activation Gene Expression Genes Genomics Grant Holothuria Human Immunohistochemistry Immunology In Situ Hybridization In Vitro Injury Intestines Mammals Mediating Mesentery Molecular Muscle Muscle Cells Natural regeneration Organ Organism Outcome Pathway interactions Pharmaceutical Preparations Pharmacology Phylogenetic Analysis Play Population Process Publications RNA Interference Regenerative capacity Regenerative response Research Role Sea Cucumbers Serous Membrane Signal Pathway Signaling Protein Structure Therapeutic Tissues Training Underrepresented Minority Vertebrates base cell dedifferentiation experimental study gene product genetic element graduate student healing improved in vivo knock-down novel novel therapeutics precursor cell programs regenerative repaired single cell mRNA sequencing success tool transcription factor undergraduate student wound healing

项目摘要

SUMMARY Digestive diseases affect millions of Americans each year, and a significant number will die from them. The main culprits of these diseases are disrupted cellular mechanisms for homeostatic control and deficient repair mechanisms. Repair mechanisms play an important role in healing after natural events that damage the digestive tract and after gastrointestinal surgery. Accordingly, the ability to regenerate intestinal tissue could be an important therapeutic tool. Although advances have been made on the regeneration of the luminal layer of the vertebrate digestive tract, little is known about the regeneration of other cells and tissue layers or of the organ as a whole. Part of the problem is that in vertebrates, these cells or tissue layers have limited regenerative capacity. This proposal uses a novel model system, an echinoderm, to study intestinal regeneration. Among deuterostomes, echinoderms comprise some of the closest relative to vertebrates that have amazing regenerative capacities. One of these organisms, the sea cucumber Holothuria glaberrima, possesses the innate ability to regenerate their entire digestive tract after it is self- autotomized. The present proposal searches to establish the role of cellular mechanisms and their underlying molecular bases on the regeneration of H. glaberrima intestine. Signaling pathways and candidate transcription factor genes will be probed pharmacologically and by gene knockdown, in vivo and in vitro, to determine their involvement in intestinal regeneration. The obtained data will be incorporated into our gene/cellular network that explains the step-by-step activation of cellular events. Additional experiments will define the cellular populations found in normal and regenerating intestines. These experiments will serve to further identify the cells/genes associated with the early regenerative events in intestinal regeneration. Our results could serve as the basis for the development of new therapeutics/drugs that modulate regenerative processes. They will also provide important information to other fields of research, including wound healing, immunology, cell biology, genomics and phylogenetics. Finally, the outcome of these experiments will bring us closer to a better understanding of regenerative processes in general.

概括消化疾病每年会影响数百万美国人，其中大量会死亡。这些疾病的主要罪魁祸首是稳态控制和不足的维修机制。自然事件后，维修机制在康复中起着重要作用那会损害消化道和胃肠道手术后。因此，再生能力肠组织可能是重要的治疗工具。尽管已经在脊椎动物消化道的腔层的再生，对再生知之甚少其他细胞和组织层或器官的整体。问题的一部分是在脊椎动物中，这些细胞或组织层的再生能力有限。该提案使用一种新型的模型系统，一种棘皮动物来研究肠道再生。之中氘代表，棘皮动物包括与具有惊人的脊椎动物最接近的一些再生能力。这些生物之一，海参glaberrima拥有自动化后，先天性的能力可以再生其整个消化道。目前的建议搜索以确定细胞机制及其基础的作用分子碱基在H. glaberrima肠的再生上。信号通路和候选人转录因子基因将通过药理学和基因敲低，体内和体外探测，确定它们参与肠再生。获得的数据将被整合到我们的基因/细胞网络解释了细胞事件的分步激活。其他实验将定义在正常和再生肠中发现的细胞种群。这些实验会用于进一步识别与早期再生事件相关的细胞/基因再生。我们的结果可以作为开发调节新疗法/药物的基础再生过程。他们还将向其他研究领域提供重要信息，包括伤口愈合，免疫学，细胞生物学，基因组学和系统发育学。最后，这些结果实验将使我们对总体上的再生过程有了更好的了解。