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In vitro Fertilization of the Mongolian Gerbil Egg   

李长龙李长龙*郭红刚郭红刚*郭萌郭萌杜小燕杜小燕陈振文陈振文  (*contributed equally to this work)
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摘要:长爪沙鼠精子体外受精是确保遗传多样性的重要基础性工作,也是实验动物生物净化的常用技术。我们通过实验验证制定本技术规程。结果表明,方法有效可行,为后续其他工作奠定了良好基础。

关键词: 长爪沙鼠, 精子, 体外受精

材料与试剂

  1. 矿物油(sigma, catalog number: M8410)
  2. 体外获能液(自行配置)
  3. 体外受精液(自行配置)

仪器设备

  1. CO2培养箱(Thermo)
  2. 倒置显微镜(LAICA)
  3. 35 mm培养皿(Corning, USA)
  4. 手术器械(镊子,手术剪,显微镊,显微剪)

实验步骤

实验前准备

  1. 雌鼠的超数排卵:参照其他部分。
  2. 液滴平衡:取获能液和受精液在35 mm培育皿中分别作获能液滴(300 μL/滴)和受精液滴 (200 μL/滴),用矿物油覆盖液滴,在使用前30分钟平衡。

实验步骤

  1. 精子的获取与获能:
  2. 取4月龄有繁育能力的雄鼠,颈椎脱臼处死,腹部75%酒精消毒,打开腹腔,取附睾尾。用眼科剪小心将附睾尾周围的脂肪剥离,在灭菌滤纸去除血迹和脂肪,用拇指和食指轻轻挤压附睾尾,同时用1 mL注射器针头刺破附睾尾,待破口处涌出乳白色的精子团后用1 mL注射器针头挑出30微升精子,置于预先平衡液滴中,在5% CO2、95%空气、饱和湿度100%、37 °C培养箱中获能4 h。
  3. 卵子的获取:参照其他部分。
  4. 体外受精:用10 μL移液枪从获能液滴的周边吸取10μL精子加入到有卵丘团的受精液中,每200 μL液滴中含40-60个卵母细胞,二氧化碳培养箱孵育8-9 h。

结果与分析

受精培养8-9 h后将卵子移出(图1~2),置于受精液中洗3遍,移入预先平衡的受精液中继续培养48 h 后观察2-cell发育率(图3~6)


图1. 超排后卵巢


图2. 体外受精中


图3. 体外受精率47.5%


图4. 体外受精率58.1%


图5. 体外受精率65.2%


图6. 体外受精率84.6%

溶液配方

  1. 体外获能液
    组成成分为:NaCl、KCl、NaHCO3、葡萄糖、丙酮酸钠、牛磺酸、肾上腺素、BSA、MgCl2·6H2O、NaH2PO4·2H2O、CaCl2·2H2O、酚红(0.5%)、青霉素G、硫酸链霉素及DL⁃乳酸钠溶液,pH 值为(7.35 ± 0.10),渗透压为(315 ± 5)
  2. 体外受精液(组成成分除BSA加倍外,其余同体外获能液。)

致谢

感谢国家自然科学基金项目(Nos. 31572341, 31572347, 31772545, 31572348)、国家科技支撑计划项目(No. 2015BAI09B00)和“十三五”时期北京市属高校高水平教师队伍建设支持计划(IDHT20170516)资助。

参考文献

  1. 郭红刚,李莉,周生来,卢领群,李坤,杜江涛,石巧娟,金秀清,李长龙,萨晓婴,应华忠,褚晓峰. (2017). 长爪沙鼠体外受精与早期胚胎体外培养体系的初步建立. 中国实验动物学报 25: 624-631.
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Copyright: © 2021 The Authors; exclusive licensee Bio-protocol LLC.
引用格式:李长龙, 郭红刚, 郭萌, 杜小燕, 陈振文. (2021). 长爪沙鼠体外受精. // 实验动物胚胎操作实验手册. Bio-101: e1010932. DOI: 10.21769/BioProtoc.1010932.
How to cite: Li, C. L., Guo, H., G., Guo, M., Du, X., Y., and Chen, Z., W. (2021). In vitro Fertilization of the Mongolian Gerbil Egg. // Embryo Manipulation Manual of Laboratory Animals. Bio-101: e1010932. DOI: 10.21769/BioProtoc.1010932.
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