首页> 外文期刊>American Journal of Physiology >Aquaporin-2 downregulation in kidney medulla of aging rats is posttranscriptional and is abolished by water deprivation
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Aquaporin-2 downregulation in kidney medulla of aging rats is posttranscriptional and is abolished by water deprivation

机译:衰老大鼠肾脏延髓中水通道蛋白2的下调是转录后的,并且由于缺水而被消除

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We previously suggested that, despite proper AVP signaling, the threshold for AQP2 upregulation by AVP is higher in senescent rats than in adults. Indeed, administration of the V2 receptor agonist dDAVP to old animals is sufficient to bring AQP2 expression back to control values (12). Furthermore, long-term food restriction is also associated with a higher plasma AVP level, which prevents the polyuria of senescent rats (11). Nevertheless, dDAVP stimulation does not completely correct urine concentration in senescent animals, suggesting that molecular mechanisms other than the AVP signaling pathway might be involved in the age-related concentrating defect.
机译:我们以前曾提出,尽管有适当的AVP信号传导,但衰老大鼠中AVP上调AQP2的阈值高于成人。实际上,对老龄动物施用V2受体激动剂dDAVP足以使AQP2表达恢复至对照值(12)。此外,长期的食物限制也与血浆AVP水平升高有关,这可以防止衰老大鼠的多尿症(11)。然而,dDAVP刺激不能完全纠正衰老动物的尿液浓度,表明除AVP信号传导途径外的其他分子机制可能与年龄相关的集中缺陷有关。

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