ESGRO重组小鼠LIF蛋白 [白血病抑制因子]，ESGRO® Recombinant Mouse LIF Protein [Murine LIF, Mouse LIF, mLIF]；>95% (active component mLIF, SDS-PAGE)

ESGRO 小鼠 LIF 培养基补充剂以有效单位/mL 的形式提供，以确保批次之间的性能一致。 每批 ESGRO 补充剂均经过严格的质量控制测试，以确保能可靠地抑制小鼠多能干细胞分化。 ESGRO 小鼠 LIF 补充剂可用于小鼠胚胎干（ES）和诱导性多能干（iPS）细胞的基于饲养层和无饲养层的培养。

小鼠白血病抑制因子（LIF，mLIF）通过抑制自发分化，促进多能小鼠胚胎干（ES）和诱导多能干（iPS）细胞的自我更新和长期维持。

 

ESGRO 补充剂的应用包括用作体外维持鼠 ES 细胞多能表型的试剂。

建议的实验方案：
ES 细胞：在 D3 和 MBL-1 多能 ES 细胞培养物中，研究发现，通常每 1.0 mL 组织培养基需要 1000 U ESGRO 补充剂来维持具有干细胞表型的 ES 细胞。 相似浓度的 mLIF 也已用于遗传修饰的 ES 细胞的种系传递（E3）。

在推荐浓度下，10⁷ 单位的 ESGRO 足以用于 10.0 L 的组织培养基，而 10⁶ 单位的 ESGRO 补充剂足以用于 1.0 L 的组织培养基。

 

ESGRO 补充剂以液体形式提供，含量为 10⁷ 单位，溶于 1.0 mL 磷酸盐缓冲盐水，含 1％w/v 牛血清白蛋白 BSA 为载体以确保稳定性。

形式：纯化

 

提供的 ESGRO^® 补充剂经 0.22 微米无菌过滤，并在支原体检测中呈阴性。

 

ESGRO 补充剂在环境温度下运输。出于客户关系，可能包含一个冰袋，但确实没必要。开发期间已使用 ESGRO 补充剂进行了广泛的稳定性测试。 该产品自生产之日起，以浓缩形式或在无菌组织培养基中稀释后至少可稳定保存 18 个月，且对 ES 细胞没有活性损失。 若要长期储存，建议将 ESGRO 补充剂储存于 4°C。 冻融会降低效力。建议在使用前，将 ESGRO 补充剂在无菌组织培养基中稀释并等分至合适的浓度，然后储存于 4°C。应避免冻融。在 ES 细胞培养期间，该产品在 37°C，5％ CO2 培养箱中可稳定至少 7 天。

 

比活度：ESGRO^® 补充剂在小鼠胚胎干细胞（D3 & MBL-1）和鼠 M1 髓样白血病细胞上进行了评估（4）。50 单位的标准定义为在 1.0mL 组织培养基中可诱导 50％ 的 M1 菌落分化的 ESGRO 补充剂的浓度（4）。 10E7 单位相当于大约 100 μg 的纯蛋白质，足以处理 10L 的 ES 细胞培养基。

胚胎干细胞测定：分化抑制测定，浓度为 1000 单位/mL 小鼠骨髓白血病细胞 M1：比活度 >/= 10⁸ 单位/mg

 

CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany

ESGRO is a registered trademark of Merck KGaA, Darmstadt, Germany

 

Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

LABEL LICENSE - USE RESTRICTED TO RESEARCH USE ONLY

Leukemia Inhibitory Factor ("LIF") is protected by US Patents No. 5,443,825 and 5,750,654 and Canada Patent No. 1,341,581 and 1,341,469 owned by AMRAD Corporation Ltd. and licensed exclusively to Millipore for research uses. The use of this product is limited for research uses only and not for any commercial purposes, such as making or developing other research products from this product or use of this product as a component in a research kit. This product is not to be used in humans or for any diagnostic purposes.

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