Ambystoma Genetic Stock Center

项目摘要 Ambystoma Genetic Stock Center（AGSC）是一个P40研究资源中心，分发 实验室蝾螈（Ambystoma mexicanum）的研究人员和教育工作者， 化国际大AGSC目前正在开展一个项目，以制定一个可复制的协议 冷冻保存蝾螈精子，这是需要有效地管理蝾螈股票内， AGSC和更广泛的蝾螈社区。该项目的早期结果发现， 精子细胞在被包装成一种叫做 精子囊这对制定精子冷冻保存方案提出了挑战 因为有一个狭窄的时间窗口，在此期间可以收获精荚， 获得有活力的精子。此外，在不同的温度下， 一天中的很多时候，更多的时候是在晚上，而不是在工作日。时间参数 收集具有活精子的精囊尚未定义，因为交配 这一过程从未被严格监测，以了解精囊何时沉积。 在确定这些参数之前，不可能收集大量可行的 精囊，从中开发和优化冷冻保存方法。有 迫切需要制定一个标准的协议，收集精子与活精子。 还迫切需要优化和获得在冷冻室冷冻和解冻精子的能力。 AGSC，并将体外受精纳入工作流程。为了满足这些需求， AGSC将雇用一名具有冷冻保存和美西蝾螈经验的全职员工 生物学新员工将与本科生工作人员一起监测美西蝾螈 为了记录行为数据和收集 精子囊将使用试剂和条件冷冻和解冻精子 水生种质和遗传资源中心（AGGRC）推荐， 路易斯安那州立大学农业中心和实验将进行测定 精子活力和体外受精成功率。拟议工作产生的议定书将 公开提供。这一行政补充将加快发展中国家的进展， 美西蝾螈精子冷冻保存方案和建立AGSC管理种质的能力 美西蝾螈群落的最佳选择。 .

PROJECT SUMMARY The Ambystoma Genetic Stock Center (AGSC) is a P40 Research Resource that distributes laboratory axolotls (Ambystoma mexicanum) to researchers and educators nationally and internationally. The AGSC is currently working on a project to develop a reproducible protocol for cryopreserving axolotl sperm, which is needed to efficiently manage axolotl stocks within the AGSC and the broader axolotl community. Early results from this project found that axolotl spermatids are viable for only a short time after they are packaged into structures called spermatophores. This presents a challenge to develop a sperm cryopreservation protocol because there is a narrow window of time within which spermatophores can be harvested to obtain viable sperm. Additionally, spermatophores were found to be laid by males at various times of the day, more often at night and not during the workday. Temporal parameters for collecting spermatophores with viable sperm have not been defined because the mating process has never been rigorously monitored to know when spermatophores are deposited. Until these parameters are defined, it will not be possible to collect large numbers of viable spermatophores from which to develop and optimize methods for cryopreservation. There is critical need to develop a standard protocol for collecting spermatophores with viable sperm. There is also critical need to optimize and gain capacity for sperm freezing and thawing at the AGSC, and to integrate in vitro fertilization into the workflow. To address these needs, the AGSC will hire a full-time employee with previous experience in cryopreservation and axolotl biology. The new employee will work with undergraduate student workers to monitor axolotl courtship during the day and night for the purpose of recording behavioral data and collecting spermatophores. Spermatophores will be frozen and thawed using reagents and conditions recommended by the Aquatic Germplasm and Genetic Resources Center (AGGRC) at the Louisiana State University Agricultural Center and experiments will be performed to assay sperm viability and in vitro fertilization success. Protocols arising from the proposed work will be made publicly available. This administrative supplement will accelerate progress in developing an axolotl sperm cryopreservation protocol and building AGSC capacity to manage germplasm for the axolotl community. .