Nat Cell Biol:美容觉真的可以美容吗?科学家给出合理解释

2020-02-05 不详 生物探索

充足的睡眠是美的前提,但其中的原因是什么呢?

通常认为,晚上10点到次日凌晨2点是美容觉时间,坚持睡美容觉可以改善皮肤状态、祛除黑眼圈、提高免疫力等。充足的睡眠是美的前提,但其中的原因尚不得知。

近日,科学家们通过小鼠实验,发现了两种胶原蛋白的绳状结构,一种是直径约200nm、稳定存在的粗纤维,另一种是直径约50nm、牺牲性的细纤维,后者在白天的劳作中易断裂,而在晚上睡眠中可得到修复。这从生物钟角度解释了睡个好觉的益处,该成果发表在《Nature Cell biology》期刊上。


DOI:10.1038/s41556-019-0441-z

胞外基质(extracellular matrix, ECM)占据人一半以上的体重,它以结缔组织的形式为细胞提供结构和生物支持,如骨骼,皮肤,肌腱和软骨等。而胶原蛋白约占ECM的一半,到我们17岁时,它基本上完全形成。

由于肌腱是受昼夜节律调节并含有胶原纤维的外周组织,因此研究者首先利用透射电子显微镜观察野生型C57 / BL6小鼠的肌腱直径三峰分布随时间的变化,同时计算应力松弛曲线,发现在进入黑暗的3小时(3h into darkness, ZT15)收获的肌腱比在进入光照的3小时(3h into light, ZT3)收获的肌腱能量损失更大,得出结论,肌腱在晚上放松得更快。


肌腱胶原ECM的昼夜调节

同时,小鼠肌腱的时序蛋白质印迹分析表明,SEC61,TANGO1,PDE4D和VPS33B在昼夜节律期间依次表达。此外,研究者还使用敲除与免疫定位荧光共聚焦显微镜相结合的方法,发现胶原纤维的组装需要这四种蛋白的参与。

总的来说,胶原蛋白是我们最丰富的蛋白质,可确保人体结缔组织的完整性,弹性和强度,永久性的粗纤维需要牺牲性的细纤维来维持,且后者需要及时补充,就像需要给汽车加油、给散热器注满水一样。该研究结果可能使我们对伤口如何愈合或我们如何老化等问题有更深入的了解。

原始出处:

Joan Chang, Richa Garva, Adam Pickard, et.al. Circadian control of the secretory pathway maintains collagen homeostasis. Nature Cell Biology 06 January 2020

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    2020-10-15 sunylz
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    2020-04-03 维他命
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  6. [GetPortalCommentsPageByObjectIdResponse(id=1918974, encodeId=31c119189e429, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Thu Oct 15 06:26:00 CST 2020, time=2020-10-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1871558, encodeId=30a218e155891, 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=Mon Nov 09 09:26:00 CST 2020, time=2020-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1688879, encodeId=033216888e901, content=<a href='/topic/show?id=1e74e993465' target=_blank style='color:#2F92EE;'>#美容#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79934, encryptionId=1e74e993465, topicName=美容)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c23128667605, createdName=12498adam49暂无昵称, createdTime=Mon Apr 20 11:26:00 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1961849, encodeId=ea511961849cc, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, 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=Fri Apr 03 07:26:00 CST 2020, time=2020-04-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767740, encodeId=7f671e6774070, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Jul 24 13:26:00 CST 2020, time=2020-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1884108, encodeId=8f7d188410848, 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=Sat Feb 29 12:26:00 CST 2020, time=2020-02-29, status=1, ipAttribution=)]
    2020-02-29 liye789132251

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