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Cell Stem Cell:日本研制新方法可大量廉价制作血小板

2014-02-15 佚名 爱医

京都大学的研究小组在14日的美国《细胞-干细胞》CellStemCell 杂志网络版上报告称,他们利用能够发育成各种组织和脏器细胞的iPS细胞,成功开发出了在短时间内大量廉价制作血小板的方法。这一成果将有利于稳定供应输血时所需的血小板。 日本研制新方法可大量廉价制作血小板血小板是血液细胞之一,能够凝固血液,防止出血,手术时使用的血小板现在完全依赖献血,但是通过献血获得的血小板在室温下只能保存约4天

京都大学的研究小组在14日的美国《细胞-干细胞》CellStemCell 杂志网络版上报告称,他们利用能够发育成各种组织和脏器细胞的iPS细胞,成功开发出了在短时间内大量廉价制作血小板的方法。这一成果将有利于稳定供应输血时所需的血小板。



日本研制新方法可大量廉价制作血小板

血小板是血液细胞之一,能够凝固血液,防止出血,手术时使用的血小板现在完全依赖献血,但是通过献血获得的血小板在室温下只能保存约4天。

尽管此前其他研究队伍也利用iPS细胞制作出了血小板,但是由于培育出的巨核细胞的增殖能力有限,所以难以用较低的成本大量获得血小板。京都大学iPS细胞研究所教授江藤浩之率领的研究小组,利用iPS细胞培养出造血前体细胞之后,向其植入c-MYC和BMI1这两种基因,两周时间后,再追加植入BCL-XL基因,结果成功地制作出了几乎可以无限增殖的巨核细胞。让这三种基因停止发挥作用后,巨核细胞就开始制作血小板。由于能够稳定增加巨核细胞,制作血小板的效率相当于以前技术的100倍以上,制造成本也大幅降低。

由于巨核细胞非常稳定,几乎可以无限增殖,因此能够大量生产血小板,单次输血时所需的1000亿个血小板5天时间就可以准备好。这种巨核细胞在被冷冻保存数月时间后,依然能够制造血小板。虽然与从人体内采集的血小板相比止血功能尚差一些,不过研究小组认为,通过增加用量,能够弥补性能上的差距。

研究小组准备以血小板减少症为对象,在2年后开始临床研究,争取在10年后达到实用化。

原始出处:

Sou Nakamura, Naoya Takayama, Shinji Hirata, Hideya Seo, Hiroshi Endo, Kiyosumi Ochi, Ken-ichi Fujita, Tomo Koike, Ken-ichi Harimoto, Takeaki Dohda, Akira Watanabe, Keisuke Okita, Nobuyasu Takahashi, Akira Sawaguchi, Shinya Yamanaka, Hiromitsu Nakauchi, Satoshi Nishimura, Koji Eto. Expandable Megakaryocyte Cell Lines Enable Clinically Applicable Generation of Platelets from Human Induced Pluripotent Stem Cells. Cell Stem Cell, 13 February 2014; DOI: 10.1016/j.stem.2014.01.011

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    2014-02-27 维他命
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    2014-02-15 61.132.226.159

    小日本真强得很,尤其干细胞领域,确实处于依靠位置

    0

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