Cell Rep:为啥“越老伤口愈合越快”?阻断一种分子就能预防疤痕?

2018-09-30 佚名 生物通

老年人伤口愈合比年轻人快,而且疤痕更少,因为老年人血液中有一种被称为基质细胞衍生因子1(stromal cell-derived-factor-1,SDF-1)的化合物。

老年人伤口愈合比年轻人快,而且疤痕更少,因为老年人血液中有一种被称为基质细胞衍生因子1(stromal cell-derived-factor-1,SDF-1)的化合物。

宾夕法尼亚大学医学院的研究人员证明,阻断这种物质,可以影响小鼠和人类皮肤瘢痕形成和组织再生,这是一条有潜力的创伤后无瘢痕护理途径,造福人类。

文章现已发表于Cell旗下的《Cell Reports》,小鼠和体外人类皮肤实验已获证实。



“皮肤科和外科整形医生观察到,老年人的伤口比年轻人愈合的快,而且疤痕更薄,但是到目前为止还没人能回答为什么,”文章通讯作者、皮肤病学助理教授Thomas H. Leung说。

在研究中,Leung和同事刺穿不同年龄的小鼠耳朵(相当于人类12岁到70岁),老年小鼠没有形成疤痕和孔闭合,年轻小鼠的疤痕显而易见。然后,研究人员将幼鼠血液与老年小鼠交换,再刺穿耳朵,发现老年小鼠的耳朵也变得伤痕累累。他们断定,造成疤痕的物质一定是血里的东西。



随后,研究人员采集年轻和年老小鼠组织样本,比较基因表达特征,发现了大约80个差异,差异太多,这样没法继续研究。但是当他们分析哪些属于血液基因产物时,差异列表缩小到了13个。其中,SDF1是重点怀疑对象,以前的研究表明,它在皮肤、肝脏和肺部瘢痕形成中起作用。

接下来的实验更进一步证实了研究人员的猜测,SDF1在年轻小鼠体内表达,老年小鼠不表达。研究人员创建了皮肤缺乏SDF1的小鼠模型,当SDF1功能被失活后,年轻小鼠的耳朵也开始再生皮肤,表现得就像老年小鼠一样。

“这是一个罕见的例子,衰老实际上能改善身体自愈能力,而不是减弱这个能力,”Leung说。“当我们年轻的时候,我们分泌很多SDF1到血液中,促进疤痕形成,随着年龄增长,我们逐渐失去了这种能力,反而允许组织再生。”

为了再次佐证,研究人员将缺乏SDF1的幼年小鼠血液替换给老年小鼠,这一次,两只小鼠,无论幼年还是老年,都没有疤痕累累。

他们还用手术刀刺伤实验室培养的人类皮肤,证明人类皮肤愈合也受SDF1表达影响。

事实上,市面上已经有现成的SDF1抑制剂了,Leung说,目前被用于改善干细胞治疗,他和他的团队计划,研究这种药物对预防人类瘢痕形成的应用。

原始出处:Nishiguchi MA1, Spencer CA1, Leung DH2, Leung TH3. Aging Suppresses Skin-Derived Circulating SDF1 to Promote Full-Thickness Tissue Regeneration. Cell Rep. 2018 Sep 25;24(13):3383-3392.e5. 

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    2019-08-07 维他命
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    2018-10-14 laoli

    学习了,谢谢分享!

    0

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  6. [GetPortalCommentsPageByObjectIdResponse(id=1710159, encodeId=b0c01e1015905, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Mon Dec 17 06:44:00 CST 2018, time=2018-12-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1870891, encodeId=3e4f18e08913a, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sat Feb 09 19:44:00 CST 2019, time=2019-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1961162, encodeId=c61219611628c, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Wed Aug 07 00:44:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=349272, encodeId=90613492e29e, content=学习了,谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLC1BMzZWdMSPQWuib6BtQGicK8ygGBM6YakpfkRc67soFSuKbZr86enL1KggQZEZbgWSeicJibafmYfQ3AibicIHMwwicmDShfRFvvI38/0, createdBy=272a110164, createdName=laoli, createdTime=Sun Oct 14 10:46:02 CST 2018, time=2018-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1309881, encodeId=46ee1309881df, content=<a href='/topic/show?id=5e6926003ae' target=_blank style='color:#2F92EE;'>#伤口愈合#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26003, encryptionId=5e6926003ae, topicName=伤口愈合)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8949377, createdName=chenzhuanggui, createdTime=Tue Oct 02 12:44:00 CST 2018, time=2018-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1394115, encodeId=6f5013941152b, content=<a href='/topic/show?id=7b29e0460b1' target=_blank style='color:#2F92EE;'>#疤痕#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70460, encryptionId=7b29e0460b1, topicName=疤痕)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/qXbLjJB4FSzhQS3C5qQFMJkqicRIJFL6zHFwwhv0I95nzA6xicevQcEica0gk4A58UkbMMriadAgTY2b7N7Yd0ZsQg/132, createdBy=910c2500152, createdName=HinsMax, createdTime=Tue Oct 02 12:44:00 CST 2018, time=2018-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=347434, encodeId=3fb134e43489, content=了解一下,谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2019/12/23/2f51002e1349ccda5be11c1eea1e1e60.jpg, createdBy=a22097948, createdName=天地飞扬, createdTime=Sun Sep 30 21:58:41 CST 2018, time=2018-09-30, status=1, ipAttribution=)]
    2018-10-02 HinsMax
  7. [GetPortalCommentsPageByObjectIdResponse(id=1710159, encodeId=b0c01e1015905, content=<a href='/topic/show?id=7ac59e67604' target=_blank style='color:#2F92EE;'>#阻断#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=47, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=97676, encryptionId=7ac59e67604, topicName=阻断)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=b5ca31824852, createdName=41514497@qq.com, createdTime=Mon Dec 17 06:44:00 CST 2018, time=2018-12-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1870891, encodeId=3e4f18e08913a, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Sat Feb 09 19:44:00 CST 2019, time=2019-02-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1961162, encodeId=c61219611628c, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Wed Aug 07 00:44:00 CST 2019, time=2019-08-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=349272, encodeId=90613492e29e, content=学习了,谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLC1BMzZWdMSPQWuib6BtQGicK8ygGBM6YakpfkRc67soFSuKbZr86enL1KggQZEZbgWSeicJibafmYfQ3AibicIHMwwicmDShfRFvvI38/0, createdBy=272a110164, createdName=laoli, createdTime=Sun Oct 14 10:46:02 CST 2018, time=2018-10-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1309881, encodeId=46ee1309881df, content=<a href='/topic/show?id=5e6926003ae' target=_blank style='color:#2F92EE;'>#伤口愈合#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26003, encryptionId=5e6926003ae, topicName=伤口愈合)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8949377, createdName=chenzhuanggui, createdTime=Tue Oct 02 12:44:00 CST 2018, time=2018-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1394115, encodeId=6f5013941152b, content=<a href='/topic/show?id=7b29e0460b1' target=_blank style='color:#2F92EE;'>#疤痕#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70460, encryptionId=7b29e0460b1, topicName=疤痕)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/qXbLjJB4FSzhQS3C5qQFMJkqicRIJFL6zHFwwhv0I95nzA6xicevQcEica0gk4A58UkbMMriadAgTY2b7N7Yd0ZsQg/132, createdBy=910c2500152, createdName=HinsMax, createdTime=Tue Oct 02 12:44:00 CST 2018, time=2018-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=347434, encodeId=3fb134e43489, content=了解一下,谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2019/12/23/2f51002e1349ccda5be11c1eea1e1e60.jpg, createdBy=a22097948, createdName=天地飞扬, createdTime=Sun Sep 30 21:58:41 CST 2018, time=2018-09-30, status=1, ipAttribution=)]
    2018-09-30 天地飞扬

    了解一下,谢谢分享!

    0

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