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Transcriptional networks coordinating luminal environment in the human epididymis: the role of the androgen receptor.

协调人类附睾管腔环境的转录网络：雄激素受体的作用。

基本信息

批准号：
10402257
负责人：
ANN HARRIS
金额：
$ 33.92万
依托单位：
CASE WESTERN RESERVE UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2011
资助国家：
美国
起止时间：
2011-08-10 至 2024-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10402257
关键词：
3-Dimensional Address Anatomy Androgen Receptor Androgen-Insensitivity Syndrome Androgens Bicarbonates Binding Biological Assay Biological Models Cell Nucleus Characteristics Chlorides Cystic Fibrosis Transmembrane Conductance Regulator Data Dependence Development Disease Duct (organ) structure Ductal Epithelium Environment Epididymis Epithelial Epithelial Cells Experimental Models Fertility Study Funding Gene Expression Genes Genetic Transcription Goals Head Health Hormones Human Human Biology Individual Infertility Investigation Ion Channel Ion Transport Ions Ligands Liquid substance Male Contraceptive Agents Male Genital Organs Male Infertility Malignant neoplasm of prostate Mediating Methods MicroRNAs Modeling Molecular National Institute of Child Health and Human Development Nuclear Receptors Organoids Outcome Pathway interactions Physiology Potassium Property Prostate Protocols documentation RUNX1 gene Regulation Regulatory Element Research Research Priority Role Series Small Interfering RNA Source Sperm Maturation Sperm Motility Sperm Preservation Spermatogenesis Steroid Receptors Technology Testing Testis Therapeutic Therapeutic Intervention Tissues Vas deferens structure androgenic apical membrane basolateral membrane birth control cell type experimental study fertility preservation functional genomics gain of function mutation genome-wide human male human tissue innovation innovative technologies insight interest male male fertility member novel novel therapeutic intervention programs recruit reproductive function reproductive organ reproductive tract sertoli cell single-cell RNA sequencing small molecule inhibitor sperm cell steroid hormone transcription factor water channel zygote

项目摘要

SUMMARY: Androgens are steroid hormones with a pivotal role in determining male characteristics, which bind to the androgen receptor (AR) to direct a unique transcriptional program. Although best studied in the human prostate and in prostate cancer, the AR transcriptional network also controls normal functions of other male reproductive tract tissues, including the epididymis and the vas deferens. A critical function of the epididymis, the proximal part of the male genital ducts that transport testicular products out of the body, is in sperm maturation. Immature sperm leaving the testis acquire the capacity to fertilize an egg during their passage through the head and body of the epididymis. Many factors contribute to establishing and maintaining the specific epididymis luminal environment that is required for normal sperm maturation. These include hormones and other testicular products that enter the duct, though the epithelium lining the epididymis has a pivotal role. The proximal luminal fluid has a low pH and bicarbonate concentration to preserve sperm motility and relatively high potassium concentrations to facilitate sperm quiescence. Multiple ion channels, ion exchangers, transporters and water channels in the apical or basolateral membranes of the epididymis epithelium participate in fine-tuning the luminal fluid. Building upon a) substantial preliminary data on the AR transcriptional network in human epididymis epithelial (HEE) cells, which suggest novel co-factors for this TF are involved in the epididymis, together with b) an innovative HEE organoid model, our goal is to test the overarching hypothesis that the Androgen Receptor is pivotal to establishing and maintaining normal functions of the human epididymis epithelium. Moreover, that through the recruitment of specific co-factors, AR orchestrates a unique transcriptional program in this tissue. In the first specific aim we will determine the mechanisms through which androgens impact the differentiation and function of the human epididymis epithelium. We will use a novel epididymis organoid model for functional studies together with single cell RNA- sequencing (scRNA-seq). These experiments will provide novel and important insights into the role of androgens in the biology of the human epididymis epithelium and the transcriptional network that coordinates its functions. Studies in the second aim will determine the mechanisms of interaction of AR with other co- factors including RUNX1 and CEBPβ and how these factors integrate into the transcriptional network in the human epididymis epithelium. We will also investigate the hierarchy of dependency of AR, RUNX1 and CEBPβ using genome wide and locus-specific assays. A gene of particular interest is the cystic fibrosis transmembrane conductance regulator (CFTR), which establishes and maintains chloride and bicarbonate gradients in the epididymis lumen. CFTR recruits a unique set of cis-regulatory elements in HEE cells, some of which also bind AR. These data may facilitate the identification of novel targets for male contraceptives and also have a profound impact on therapeutic approaches to restore male fertility in epididymis disease.

摘要：雄激素是类固醇激素，在决定男性特征方面发挥着关键作用，与雄激素受体 (AR) 结合以指导独特的转录程序。尽管最好的研究是在人类前列腺和前列腺癌中，AR转录网络还控制其他细胞的正常功能男性生殖道组织，包括附睾和输精管。的一个关键功能是附睾是男性生殖管的近端部分，负责将睾丸产物输送出体外，位于精子成熟。离开睾丸的未成熟精子在其受精过程中获得了使卵子受精的能力穿过附睾头和体。许多因素有助于建立和维持正常精子成熟所需的特定附睾管腔环境。这些包括激素和其他睾丸产物进入导管，尽管附睾内壁的上皮具有举足轻重的作用。近端管腔液体具有较低的 pH 值和碳酸氢盐浓度，以保持精子活力和相对较高的钾浓度以促进精子静止。多个离子通道、离子附睾顶膜或基底外侧膜中的交换器、转运器和水通道上皮参与微调管腔液体。基于 a) AR 的大量初步数据人附睾上皮 (HEE) 细胞中的转录网络，表明该 TF 存在新的辅助因子涉及附睾，以及 b) 创新的 HEE 类器官模型，我们的目标是测试雄激素受体对于建立和维持正常功能至关重要的总体假设人类附睾上皮细胞。此外，通过招募特定的辅助因子，AR 在该组织中协调独特的转录程序。在第一个具体目标中，我们将确定雄激素影响人类附睾分化和功能的机制上皮。我们将使用一种新型附睾类器官模型与单细胞 RNA 一起进行功能研究测序（scRNA-seq）。这些实验将为我们的作用提供新颖而重要的见解。人类附睾上皮生物学中的雄激素及其协调的转录网络它的功能。第二个目标的研究将确定 AR 与其他协同作用的相互作用机制。包括 RUNX1 和 CEBPβ 在内的因子以及这些因子如何整合到转录网络中人附睾上皮。我们还将研究 AR、RUNX1 和 CEBPβ 使用全基因组和位点特异性检测。特别感兴趣的基因是囊性纤维化跨膜电导调节器 (CFTR)，用于建立和维持氯化物和碳酸氢盐附睾管腔内的梯度。 CFTR 在 HEE 细胞中招募一组独特的顺式调控元件，其中一些这也绑定了AR。这些数据可能有助于确定男性避孕药的新靶标也对恢复男性附睾疾病生育能力的治疗方法产生深远影响。