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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Related Experiment Video

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Using En Face Immunofluorescence Staining to Observe Vascular Endothelial Cells Directly
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[Endothelium Aging and Oxidative Stress].

Bo Chen, Yan-Rong Lu, You-Nan Chen

    Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
    |June 25, 2015
    PubMed
    Summary

    Oxidative stress from reactive oxygen species (ROS) causes vascular dysfunction. Antioxidant systems, particularly the Nrf2/Keapl-ARE pathway, combat ROS, offering therapeutic insights for aging-related diseases.

    Area of Science:

    • Endothelial biology
    • Oxidative stress
    • Vascular dysfunction

    Background:

    • Reactive oxygen species (ROS) in the endothelium originate from mitochondria, endothelial nitric oxide synthases, and NADPH oxidases.
    • Excessive ROS lead to oxidative stress, driving vascular dysfunction and related diseases.
    • Cellular evolution has equipped organisms with adaptive antioxidant systems to mitigate ROS damage.

    Purpose of the Study:

    • To highlight the prominent role of the Nrf2/Keapl-ARE signaling pathway in scavenging ROS.
    • To explore the crosstalk among various antioxidant stress-related signaling pathways.
    • To investigate the link between endothelial aging and oxidative stress for therapeutic strategies.

    Main Methods:

    • Review of existing literature on ROS generation and antioxidant defense mechanisms in endothelial cells.

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  • Analysis of the Nrf2/Keapl-ARE pathway's significance in the context of oxidative stress.
  • Examination of inter-pathway crosstalk in mitigating oxidative damage and promoting cell survival.

    • Main Results:

    • The Nrf2/Keapl-ARE pathway is identified as a key regulator of antioxidant defense.
    • Interactions between antioxidant pathways are crucial for alleviating oxidative stress.
    • Understanding endothelial aging and oxidative stress provides potential therapeutic avenues.

    Conclusions:

    • Adaptive antioxidant systems, especially Nrf2/Keapl-ARE, are vital for endothelial health.
    • The interplay between these pathways is essential for cellular survival under oxidative stress.
    • Targeting the relationship between endothelial aging and oxidative stress may yield new treatments for vascular diseases.