Aging Cell:使用年轻的Sca-1细胞重组衰老的骨髓干细胞可促进衰老的心脏年轻化

2020-10-02 MedSci原创 MedSci原创

老年个体的干细胞数量和质量降低,阻碍了损伤后的心脏修复和再生。我们使用年轻的骨髓(BM)干细胞抗原1(Sca-1)细胞重建老年骨髓,使老年心脏恢复活力,并研究了潜在的分子机制。

老年个体的干细胞数量和质量降低,阻碍了损伤后的心脏修复和再生。我们使用年轻的骨髓(BM)干细胞抗原1(Sca-1)细胞重建老年骨髓,使老年心脏恢复活力,并研究了潜在的分子机制,研究结果已在线发表于Aging Cell。

将年轻(2-3个月)或老龄(18-19个月)GFP转基因小鼠的骨髓Sca-1+或Sca-1-细胞移植到经致命照射的老龄小鼠中,产生4组嵌合体:年轻Sca-1+,年轻Sca-1-,老龄Sca-1+,老龄Sca-1-。

 

结果显示,四个月后,Sca-1+嵌合体心脏中,年轻化相关基因(Bmi1、Cbx8、PNUTS、Sirt1、Sirt2、Sirt6)和蛋白(CDK2、CDK4)的表达与端粒酶活性和端粒相关蛋白(DNA-PKcs, TRF-2)的表达同时增加,而衰老相关基因(p16INK4a , P19ARF , p27Kip1 )和蛋白(p16INK4a , p27Kip1 )的表达降低,尤其是在年轻组。宿主心脏内皮细胞(GFP- CD31+ )而不是心肌细胞是年轻Sca-1+细胞年轻化的主要细胞类型,表现为增殖、迁移和管形成能力的改善。C-X-C趋化因子CXCL12是年轻的Sca-1+嵌合体心脏分离出的同源供体BM(GFP+)细胞中表达最高的因子。Cxcr4、Phospho-Akt和Phospho-FoxO3a的蛋白表达在来自老年嵌合体心脏的内皮细胞中有所增加,尤其是在年轻的Sca-1+组。

综上所述,该研究结果表明,使用年轻的Sca-1+细胞重组老化的BM,使功能性干细胞有效地归巢在老化的心脏中。这些年轻的再生干细胞通过激活心脏内皮细胞的Cxcl12/Cxcr4通路,促进了老年心脏的年轻化。

 

原始出处:

 

Jiao LiShu-Hong Li, et al., Long-term repopulation of aged bone marrow stem cells using young Sca-1 cells promotes aged heart rejuvenation. Aging Cell. 2019 Dec;18(6):e13026. doi: 10.1111/acel.13026. 

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    2021-09-07 爆笑小医
  4. [GetPortalCommentsPageByObjectIdResponse(id=1805427, encodeId=a1d4180542ea7, content=<a href='/topic/show?id=3c5fe8051d7' target=_blank style='color:#2F92EE;'>#细胞重组#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78051, encryptionId=3c5fe8051d7, topicName=细胞重组)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=263b421, createdName=zhaozuguo, createdTime=Wed Apr 07 12:13:21 CST 2021, time=2021-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1871995, encodeId=ea2018e199506, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Thu Jun 17 22:13:21 CST 2021, time=2021-06-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1962296, encodeId=8f9719622968c, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=37, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=395f25, createdName=爆笑小医, createdTime=Tue Sep 07 00:13:21 CST 2021, time=2021-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1025503, encodeId=8a8d1025503a7, content=干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=独孤立克, createdTime=Mon Oct 05 22:13:21 CST 2020, time=2020-10-05, status=1, ipAttribution=)]
    2020-10-05 独孤立克

    干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦

    0

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