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AGING CELL:只需给药四天,Cdc42特异性抑制剂可延长寿命

2020-08-06 MedSci原创 MedSci原创

Cdc42是一种小型RhoGTP酶,已有的研究显示,其在真核细胞中调节多种功能,包括肌动蛋白细胞骨架重组、细胞极性和细胞生长。

Cdc42是一种小型RhoGTP酶,已有的研究显示,其在真核细胞中调节多种功能,包括肌动蛋白细胞骨架重组、细胞极性和细胞生长。

Cdc42的活性在老年小鼠的多个组织中显著升高,而Cdc42活性增高的小鼠模型则呈现出过早衰老样表型,且寿命下降。这些数据表明,Cdc42的活性升高与衰老和寿命减少之间存在因果关系。

最近,研究人员发现,用Cdc42活性特异性抑制剂(CASIN)对老年(75周龄)雌性C57BL/6小鼠进行连续4天的系统性治疗,可以显著延长其平均和最大寿命。

有趣的是,无论是短期(治疗开始后第7天)还是长期(治疗开始后第35天)检测,给药之后,小鼠的体重、白细胞计数(WBC)、红细胞计数(RBC),以及PB中髓细胞和淋巴细胞的频率和数量都没有变化。

已有的研究显示,小鼠和人类的衰老与炎症细胞因子浓度的普遍改变有关,被称为炎症化或衰老相关免疫重塑(AAIR)。研究人员也进行了细胞因子阵列分析,以研究老年小鼠血清中的衰老相关炎症细胞因子受CASIN治疗影响的程度。

数据显示,小鼠衰老时INFγ、IL-1β和IL-1α的浓度明显增加,而CASIN处理老年小鼠后,这些细胞因子的浓度与年轻动物的浓度相似 

此外,根据血细胞中DNA甲基化水平,小鼠的表观遗传年龄也明显年轻化。

总的来说,该数据表明,CASIN的系统性给药可以降低老年小鼠的Cdc42活性,并延长小鼠的寿命。

 

原始出处:

Maria Carolina Florian et al. Inhibition of Cdc42 activity extends lifespan and decreases circulating inflammatory cytokines in aged female C57BL/6 mice, AGING CELL (2020). DOI: https://doi.org/10.1111/acel.13208

 

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    2020-08-29 jklm09
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    2020-09-16 维他命
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    2020-08-08 hongbochen
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    2020-08-08 hongbochen

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