Notch Signaling and Cross-Talk in Hypoxia: A Candidate Pathway for High-Altitude Adaptation.

Notch Signaling and Cross-Talk in Hypoxia: A Candidate Pathway for High-Altitude Adaptation.
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DOI:
10.3390/life12030437
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发表时间:
2022-03-16
期刊:
Life (Basel, Switzerland)
影响因子:
--
通讯作者:
Simonson TS
Simonson TS
中科院分区:
其他
文献类型:
--
作者:
O'Brien KA;Murray AJ;Simonson TS

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缺氧触发复杂的细胞间和细胞内信号,调节组织氧(O2)稳态,调节对流O2输送和利用(即代谢)。数千年来,人类一直暴露在高海拔的缺氧环境中,并在此过程中经历了支持适应性特征的多个基因区域的自然选择。在高原种群中发现的一些最强的选择信号来自缺氧诱导因子(HIF)途径基因。HIF通路是细胞缺氧反应的主要调控通路,但它并不是唯一的正选择调控通路。例如,与高度保守的Notch信号通路相关的区域也是首要目标,该通路可能在赋予缺氧耐受性方面发挥重要作用。在这里,我们探讨了Notch通路在介导细胞缺氧反应中的重要性。我们评估了Notch通路的转录调控,包括与HIF信号的密切交叉,以及它参与血管生成、细胞代谢、炎症和氧化应激的介导,并将这些功能与代际缺氧适应联系起来。
Hypoxia triggers complex inter- and intracellular signals that regulate tissue oxygen (O2) homeostasis, adjusting convective O2 delivery and utilization (i.e., metabolism). Human populations have been exposed to high-altitude hypoxia for thousands of years and, in doing so, have undergone natural selection of multiple gene regions supporting adaptive traits. Some of the strongest selection signals identified in highland populations emanate from hypoxia-inducible factor (HIF) pathway genes. The HIF pathway is a master regulator of the cellular hypoxic response, but it is not the only regulatory pathway under positive selection. For instance, regions linked to the highly conserved Notch signaling pathway are also top targets, and this pathway is likely to play essential roles that confer hypoxia tolerance. Here, we explored the importance of the Notch pathway in mediating the cellular hypoxic response. We assessed transcriptional regulation of the Notch pathway, including close cross-talk with HIF signaling, and its involvement in the mediation of angiogenesis, cellular metabolism, inflammation, and oxidative stress, relating these functions to generational hypoxia adaptation.
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