Nat Biotech:胚胎干细胞成功使失明小鼠恢复视力

2013-07-23 koo bio360

视网膜存在两种感光细胞:视锥细胞与视杆细胞,失去感光细胞是造成大量退行性疾病病患视力下降的“罪魁祸首”。 现在,伦敦大学学院科学家的使用实验鼠的胚胎干细胞,在人造视网膜帮助下,不仅在实验室培育出了眼部的感光细胞,而且将其移植进失明老鼠的眼部后让老鼠“重见光明”。这项刊登在《自然·生物技术》杂志上的最新研究,标志着人们向使用干细胞治疗失明又近了一步。 研究人员表示,最新研究的突破在于,他们已经证

视网膜存在两种感光细胞:视锥细胞与视杆细胞,失去感光细胞是造成大量退行性疾病病患视力下降的“罪魁祸首”。

现在,伦敦大学学院科学家的使用实验鼠的胚胎干细胞,在人造视网膜帮助下,不仅在实验室培育出了眼部的感光细胞,而且将其移植进失明老鼠的眼部后让老鼠“重见光明”。这项刊登在《自然·生物技术》杂志上的最新研究,标志着人们向使用干细胞治疗失明又近了一步。

研究人员表示,最新研究的突破在于,他们已经证明,可以将由胚胎干细胞获得的感光细胞植入成年老鼠眼部,这一研究为人类临床试验奠定了基础。他们将在 5 年内进行人体试验,试验如果取得成功,有望使医生们借用干细胞移植来改善成千上万名由于丧失感光细胞而罹患退行性眼病患者的视力。

研究人员从老鼠的胚胎中提取出了干细胞,并在实验室培育出的人造视网膜帮助下,将这些胚胎干细胞培育成了感光细胞。这一过程使得视杆细胞能发育出复杂的三维结构,而三维结构对于视杆细胞能正确“工作”非常重要。

随后,他们将大约 20 万个人造视杆细胞移植进患夜盲症的老鼠视网膜内,这些老鼠的视网膜内缺乏这种可以在低光环境下提供视力的视杆细胞,结果新细胞完全同复杂的视网膜组织结合在一起。

研究人员表示,经过多年研究,科学家们已经能很好地处理干细胞,并诱导它们发育成不同类型的成体细胞和组织。但迄今为止,视网膜的复杂结构一直被证明很难在实验室中再生。而这项最新技术很好地模拟了细胞正常的发育过程,这意味着科学家能在正确的发育阶段将细胞挑选出来并进行纯化,以确保移植成功。

研究人员计划下一步利用人类细胞对这一技术进行精炼,尽快开始人体试验。

Anai Gonzalez-Cordero, Emma L West, Rachael A Pearson, Yanai Duran, Livia S Carvalho, Colin J Chu, Arifa Naeem, Samuel J I Blackford, Anastasios Georgiadis, Jorn Lakowski, Mike Hubank, Alexander J Smith, James W B Bainbridge, Jane C Sowden& Robin R Ali. Photoreceptor precursors derived from three-dimensional embryonic stem cell cultures integrate and mature within adult degenerate retina. Nature Biotechnology, 21 July 2013; doi:10.1038/nbt.2643

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1927595, encodeId=cc2e192e5958f, content=<a href='/topic/show?id=a59234e3b4' target=_blank style='color:#2F92EE;'>#Biotech#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3473, encryptionId=a59234e3b4, topicName=Biotech)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=226a143, createdName=cathymary, createdTime=Fri May 23 00:46:00 CST 2014, time=2014-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1916964, encodeId=f142191696488, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Sat Aug 31 13:46:00 CST 2013, time=2013-08-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1743595, encodeId=2aec1e43595e3, content=<a href='/topic/show?id=c92c42e3055' target=_blank style='color:#2F92EE;'>#复视#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42730, encryptionId=c92c42e3055, topicName=复视)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2c8d35156774, createdName=ymljack, createdTime=Sat Feb 08 14:46:00 CST 2014, time=2014-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1652077, encodeId=dbea16520e732, content=<a href='/topic/show?id=13d01e24509' target=_blank style='color:#2F92EE;'>#TEC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17245, encryptionId=13d01e24509, topicName=TEC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=852f24292001, createdName=shock_melon, createdTime=Mon Jan 27 05:46:00 CST 2014, time=2014-01-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1879580, encodeId=83d318e9580b2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Feb 23 01:46:00 CST 2014, time=2014-02-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1315228, encodeId=c92413152280c, content=<a href='/topic/show?id=6fcc83e0554' target=_blank style='color:#2F92EE;'>#胚胎#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83705, encryptionId=6fcc83e0554, topicName=胚胎)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6393434, createdName=ailian1202, createdTime=Thu Jul 25 06:46:00 CST 2013, time=2013-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1351197, encodeId=d676135119e46, content=<a href='/topic/show?id=37b083e182b' target=_blank style='color:#2F92EE;'>#胚胎干细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83718, encryptionId=37b083e182b, topicName=胚胎干细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Thu Jul 25 06:46:00 CST 2013, time=2013-07-25, status=1, ipAttribution=)]
    2014-05-23 cathymary
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    2013-08-31 sunylz
  3. [GetPortalCommentsPageByObjectIdResponse(id=1927595, encodeId=cc2e192e5958f, content=<a href='/topic/show?id=a59234e3b4' target=_blank style='color:#2F92EE;'>#Biotech#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3473, encryptionId=a59234e3b4, topicName=Biotech)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=226a143, createdName=cathymary, createdTime=Fri May 23 00:46:00 CST 2014, time=2014-05-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1916964, encodeId=f142191696488, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Sat Aug 31 13:46:00 CST 2013, time=2013-08-31, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1743595, encodeId=2aec1e43595e3, content=<a href='/topic/show?id=c92c42e3055' target=_blank style='color:#2F92EE;'>#复视#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42730, encryptionId=c92c42e3055, topicName=复视)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2c8d35156774, createdName=ymljack, createdTime=Sat Feb 08 14:46:00 CST 2014, time=2014-02-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1652077, encodeId=dbea16520e732, content=<a href='/topic/show?id=13d01e24509' target=_blank style='color:#2F92EE;'>#TEC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17245, encryptionId=13d01e24509, topicName=TEC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=852f24292001, createdName=shock_melon, createdTime=Mon Jan 27 05:46:00 CST 2014, time=2014-01-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1879580, encodeId=83d318e9580b2, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Feb 23 01:46:00 CST 2014, time=2014-02-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1315228, encodeId=c92413152280c, content=<a href='/topic/show?id=6fcc83e0554' target=_blank style='color:#2F92EE;'>#胚胎#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83705, encryptionId=6fcc83e0554, topicName=胚胎)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6393434, createdName=ailian1202, createdTime=Thu Jul 25 06:46:00 CST 2013, time=2013-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1351197, encodeId=d676135119e46, content=<a href='/topic/show?id=37b083e182b' target=_blank style='color:#2F92EE;'>#胚胎干细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83718, encryptionId=37b083e182b, topicName=胚胎干细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Thu Jul 25 06:46:00 CST 2013, time=2013-07-25, status=1, ipAttribution=)]
    2014-02-08 ymljack
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    2014-01-27 shock_melon
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    2014-02-23 liye789132251
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    2013-07-25 ailian1202
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