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AGING CELL:消除衰老的破骨细胞祖细胞不能改善骨骼老化

2019-02-18 海北 MedSci原创

破骨细胞的增加和成骨细胞数量的减少都会导致骨骼衰老。已有的研究显示,细胞衰老的标志物,包括细胞周期蛋白抑制剂p16的表达,在几种骨细胞群中随着衰老而增加。

破骨细胞的增加和成骨细胞数量的减少都会导致骨骼衰老。已有的研究显示,细胞衰老的标志物,包括细胞周期蛋白抑制剂p16的表达,在几种骨细胞群中随着衰老而增加。

使用INK-ATTAC转基因法消除衰老小鼠中表达p16的细胞可以增加骨量,表明衰老细胞加速了骨骼衰老。然而,至今为止,衰老细胞的特性以及表达p16的细胞的消融可以防止骨骼衰老的程度仍然未知。

最近,研究人员使用表达p16-3MR转基因的小鼠,检查了12至24个月龄之间消除表达p16的细胞是否可以保留骨量;以及从20到26个月大的时间内消除这些细胞是否可以恢复骨量。

更昔洛韦(GCV)对p16-3MR转基因的激活可以大大降低脑,肝和来自骨髓的破骨细胞祖细胞中的p16水平。 GCV也消除了骨髓细胞的破骨细胞形成能力的年龄相关性增加。然而,GCV没有改变骨细胞中的p16水平,并且对p16-3MR小鼠的骨骼衰老没有影响。

这些发现表明,p16-3MR转基因不能消除衰老的骨细胞,但和已有报导一致,它确实消除了衰老的破骨细胞祖细胞和其他组织中的衰老细胞。消除衰老的破骨细胞祖细胞本身对年龄相关的骨量损失没有影响。因此,其他衰老细胞类型,如骨细胞,必定是开创性的罪魁祸首。


原始出处:

Ha‐Neui Kim et al. Elimination of senescent osteoclast progenitors has no effect on the age‐associated loss of bone mass in mice. Aging Cell, 2019; doi: https://doi.org/10.1111/acel.12923


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  6. [GetPortalCommentsPageByObjectIdResponse(id=1961440, encodeId=79111961440ac, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=52, 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 05 23:15:00 CST 2019, time=2019-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1871163, encodeId=8e3c18e1163eb, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Tue Dec 24 14:15:00 CST 2019, time=2019-12-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1310002, encodeId=a0b71310002f0, content=<a href='/topic/show?id=2830e349460' target=_blank style='color:#2F92EE;'>#破骨细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73494, encryptionId=2830e349460, topicName=破骨细胞)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5e30378, createdName=caobinglei8079, createdTime=Wed Feb 20 10:15:00 CST 2019, time=2019-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1388032, encodeId=2a9413880328e, content=<a href='/topic/show?id=18b3800914e' target=_blank style='color:#2F92EE;'>#老化#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=67, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=80091, encryptionId=18b3800914e, topicName=老化)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/4v5DMqK7WnzoBdibNsryQ8OEM5gFSdRH9j3HNCKPfKXlObInweOSHdQPATeTicYp7nvg3bsgicjLgRkdlhrpry21w/132, createdBy=6bf82500013, createdName=ms5822920152752585, createdTime=Wed Feb 20 10:15:00 CST 2019, time=2019-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1495142, encodeId=b0351495142d6, content=<a href='/topic/show?id=3c0b10182102' target=_blank style='color:#2F92EE;'>#骨细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=101821, encryptionId=3c0b10182102, topicName=骨细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=723c9147696, createdName=jj000004, createdTime=Wed Feb 20 10:15:00 CST 2019, time=2019-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1512459, encodeId=1b671512459ca, content=<a href='/topic/show?id=f802e4102cb' target=_blank style='color:#2F92EE;'>#祖细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74102, encryptionId=f802e4102cb, topicName=祖细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f18310470858, createdName=12498636m52(暂无昵称), createdTime=Wed Feb 20 10:15:00 CST 2019, time=2019-02-20, status=1, ipAttribution=)]
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