Cell:首次培育出人猪嵌合体胚胎,未来是福还是祸?

2017-01-27 MedSci MedSci原创

一个国际科研小组26日在美国《细胞》杂志上宣布,他们把人类干细胞注入猪胚胎中,首次成功培育出人猪嵌合体胚胎,并在猪体内发育了3到4周时间。人猪嵌合体研究面临巨大的伦理争议,但科学家认为,这项工作最终有助在动物体内培育出可供移植的人类器官,从而解决移植器官来源严重不足的难题。“我们认为这项工作意义重大,是干细胞研究领域的一个里程碑,”论文第一作者、美国索尔克生物研究所研究员吴军对新华社记者说,“这是

一个国际科研小组26日在美国《细胞》杂志上宣布,他们把人类干细胞注入猪胚胎中,首次成功培育出人猪嵌合体胚胎,并在猪体内发育了3到4周时间。

Thumbnail image of Figure 1. Opens large image

人猪嵌合体研究面临巨大的伦理争议,但科学家认为,这项工作最终有助在动物体内培育出可供移植的人类器官,从而解决移植器官来源严重不足的难题。

“我们认为这项工作意义重大,是干细胞研究领域的一个里程碑,”论文第一作者、美国索尔克生物研究所研究员吴军对新华社记者说,“这是第一次证明我们能培育人猪嵌合体胚胎。”

培育嵌合体胚胎分为两个阶段。首先,利用有“基因剪刀”之称的CRISPR技术,删除猪胚胎内形成器官的关键基因,创造遗传“空位”;其次,把人类诱导多能干细胞注入猪胚胎内。诱导多能干细胞从人类体细胞中直接获得,具有与胚胎干细胞一样分化为各类细胞的能力。
Thumbnail image of Figure 2. Opens large image

囊胚是动物胚胎发育的一个早期阶段,是一个中空的细胞球。吴军介绍说,他们使用3种不同状态的诱导多能干细胞分别植入1500多个猪囊胚。在植入猪体内后,这些囊胚经过21天到28天发育,有186个依然存活,其中不同状态的诱导多能干细胞在猪胚胎中形成“不等程度的嵌合”,但其总体比例较低,“我猜测每10万个猪细胞中可能只有不到1个人类细胞”。

人类细胞比例低是一个好消息,因为人们对人猪嵌合体的一大担忧是它可能会太像人,包括人类细胞对猪的大脑发育产生影响。在新研究中,人类细胞发育成了肌肉细胞和其他组织器官的前体细胞,而不是脑细胞的前体细胞。

吴军说,伦理担忧是一个重要问题,他们尽最大努力去恰当地解决这个问题,所以研究人员在人猪嵌合体胚胎发育21天至28天时,中止了猪的怀孕,这相当于人类怀孕8周到10周,此时组织器官处于形成的极早期。

研究人员认为,人猪嵌合体胚胎将能帮助模拟认识许多人类遗传疾病的早期起病过程,并实施药物测试,最终将带来可供移植的人类器官。由于诱导多能干细胞直接取自需要器官移植的患者,所长出的器官移植后产生的免疫排斥风险将大幅降低。

负责这项研究的索尔克生物研究所教授伊斯皮苏亚强调,这项工作是“重要第一步”,但距培育可供移植器官的最终目标还有相当遥远的距离。“现在我们想知道的是‘是与否’的问题,即人类细胞能否(对人猪嵌合体)作出贡献。既然我们得到了‘是’的答案,下一个挑战就是提高效率,引导人类细胞在猪体内形成特定器官。”

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原始出处:
Jun Wu, Aida Platero-Luengo, Masahiro Sakurai, Atsushi Sugawara, Maria Antonia Gil, Takayoshi Yamauchi, Keiichiro Suzuki, Yanina Soledad Bogliotti, Cristina Cuello, Mariana Morales Valencia, Daiji Okumura7, Jingping Luo, Marcela Vilariño, Inmaculada Parrilla, Delia Alba Soto, Cristina A. Martinez, Tomoaki Hishida, Sonia Sánchez-Bautista, M. Llanos Martinez-Martinez, Huili Wang, Alicia Nohalez, Emi Aizawa, Paloma Martinez-Redondo, Alejandro Ocampo, Pradeep Reddy, Jordi Roca, Elizabeth A. Maga, Concepcion Rodriguez Esteban, W. Travis Berggren, Estrella Nuñez Delicado, Jeronimo Lajara, Isabel Guillen, Pedro Guillen, Josep M. Campistol, Emilio A. Martinez, Pablo Juan Ross, Juan Carlos Izpisua Belmonte. Interspecies Chimerism with Mammalian Pluripotent Stem Cells.Cell, Volume 168, Issue 3, p473–486.e15, 26 January 2017

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    2017-04-08 millore
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level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160905/IMG57CD39B82D12E7926.jpg, createdBy=ac2c1946830, createdName=青龙偃月, createdTime=Sat Jan 28 10:46:19 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172990, encodeId=cc3a1e2990d0, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170207/IMG589913E36908D4741.jpg, createdBy=99331680071, createdName=knowheart, createdTime=Sat Jan 28 10:18:45 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172972, encodeId=1d931e2972bf, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2018-01-08 维他命
  4. 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level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160905/IMG57CD39B82D12E7926.jpg, createdBy=ac2c1946830, createdName=青龙偃月, createdTime=Sat Jan 28 10:46:19 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172990, encodeId=cc3a1e2990d0, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170207/IMG589913E36908D4741.jpg, createdBy=99331680071, createdName=knowheart, createdTime=Sat Jan 28 10:18:45 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172972, encodeId=1d931e2972bf, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-02-11 QQ713279ab

    科技进步,锐不可当!

    0

  5. 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likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=68174, encryptionId=f367681e434, topicName=猪)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9ec214601917, createdName=muzishouyi, createdTime=Sun Jan 29 08:10:00 CST 2017, time=2017-01-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172997, encodeId=b0d31e29970e, content=持谨慎态度, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Sat Jan 28 11:16:21 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172991, encodeId=96151e2991c4, content=学习了赞一个, beContent=null, objectType=article, channel=null, 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likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-01-29 ailian1202
  6. 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likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-01-29 muzishouyi
  7. 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level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160905/IMG57CD39B82D12E7926.jpg, createdBy=ac2c1946830, createdName=青龙偃月, createdTime=Sat Jan 28 10:46:19 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172990, encodeId=cc3a1e2990d0, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170207/IMG589913E36908D4741.jpg, createdBy=99331680071, createdName=knowheart, createdTime=Sat Jan 28 10:18:45 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172972, encodeId=1d931e2972bf, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-01-28 天涯183

    持谨慎态度

    0

  8. 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likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-01-28 青龙偃月

    学习了赞一个

    0

  9. 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level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160905/IMG57CD39B82D12E7926.jpg, createdBy=ac2c1946830, createdName=青龙偃月, createdTime=Sat Jan 28 10:46:19 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172990, encodeId=cc3a1e2990d0, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20170207/IMG589913E36908D4741.jpg, createdBy=99331680071, createdName=knowheart, createdTime=Sat Jan 28 10:18:45 CST 2017, time=2017-01-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=172972, encodeId=1d931e2972bf, content=科学在争议中进步, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eotHc7cjrVcIHD9L2n3LzcQo1WSYledtExBOM76QRXV0FrtWOsoLNA9xaJmBjsBFwPvC7fNarGfAg/132, createdBy=531e1939570, createdName=一个尘埃, createdTime=Sat Jan 28 08:01:00 CST 2017, time=2017-01-28, status=1, ipAttribution=)]
    2017-01-28 knowheart

    科学在争议中进步

    0

  10. 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