Multifactorial regulation of reproduction in fish

鱼类繁殖的多因素调控

• 批准号: 122683-2010
• 负责人: VanDerKraak, Glen
• 金额: $ 3.64万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=513715
• 关键词: Multifactorial; regulation; reproduction; fish

The long-term objective of my research is to understand the interactive mechanisms by which pituitary gonadotropins and locally derived hormones and protein growth factors regulate ovarian function in fish. The goal is to characterize ovarian signaling molecules and transduction pathways that mediate steroidogenesis, oocyte final maturation and ovulation and to integrate these responses at the whole animal level in terms of effects on spawning success. Specifically, we are studying the hormonal regulation of ovarian development in the preovulatory period through investigations of the interactive effects of gonadotropins, sex steroids, prostaglandins and insulin-like growth factors on the acquisition of follicle cell maturational competence, oocyte maturation, ovarian follicle hydration and ovulation. We are also studying the nature of the pheromonal signals from male zebrafish that contribute to endocrine changes and spawning success in the female. Our studies investigate the expression of ovarian hormones, their receptors and gene products through to reproductive success in terms of effects on spawning. This research involves both in vitro cultures of ovarian follicles and in vivo studies to characterize the hormonal regulation of the maturation and ovulation of ovarian follicles. We routinely use RIA and EIA methods to quantify ovarian steroid hormone and PG levels, RT-qPCR and in situ hybridization to characterize gene expression and immunohistochemical approaches to characterize ovarian protein hormone and receptor distribution. We will use pharmacological approaches and antisense morpholino oligonucleotides for loss of function studies to investigate the roles played by steroid hormones, PGs, peptide hormones and their receptors in relation to developmental competency and follicle survival. This knowledge is fundamental to understanding reproductive fitness and provides methods that enable examination of the mechanisms by which endocrine disrupting compounds and toxicants affect ovarian physiology in both wild and cultured fish.

我的研究的长期目标是了解垂体促性腺激素和局部衍生的激素和蛋白质生长因子调节鱼类卵巢功能的相互作用机制。我们的目标是表征卵巢信号分子和转导途径，介导类固醇生成，卵母细胞最终成熟和排卵，并整合这些反应在整个动物水平上的产卵成功的影响。具体而言，我们正在研究激素调节卵巢发育在排卵前期通过调查的相互作用的影响，促性腺激素，性类固醇，肾上腺素和胰岛素样生长因子的卵泡细胞成熟能力的收购，卵母细胞成熟，卵泡水化和排卵。我们也正在研究雄性斑马鱼的信息素信号的性质，这些信息素信号有助于雌性斑马鱼的内分泌变化和产卵成功。我们的研究调查卵巢激素的表达，其受体和基因产物，通过繁殖成功的影响产卵。本研究包括卵泡的体外培养和体内研究，以表征卵泡成熟和排卵的激素调节。我们常规使用RIA和EIA方法来定量卵巢类固醇激素和PG水平，RT-qPCR和原位杂交来表征基因表达，免疫组织化学方法来表征卵巢蛋白激素和受体分布。 我们将使用药理学方法和反义吗啉代寡核苷酸的功能丧失的研究，以调查类固醇激素，前列腺素，肽类激素及其受体在发育能力和卵泡存活发挥的作用。这方面的知识是了解生殖健康的基础，并提供了方法，使检查的机制，内分泌干扰化合物和有毒物质影响卵巢生理在野生和养殖鱼类。