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SELENOT, a Key Membrane-Bound Selenoprotein, Mediates Selenium's Protection Against Lead-Induced Renal Aging in
Biology
|August 13, 2026
Summary
Selenium protects kidneys from lead poisoning by maintaining membrane-bound selenoproteins, reducing inflammation and autophagy, and preventing kidney aging. Selenoprotein T is key in this protective mechanism against lead-induced nephropathy.
Area of Science:
- Environmental Health
- Toxicology
- Gerontology
- Molecular Biology
Background:
- Lead (Pb) pollution is a significant global health concern, with its impact on kidney aging poorly understood.
- Selenium (Se) is vital for kidney health, exerting effects through selenoproteins, particularly membrane-bound ones.
- Membrane-bound selenoproteins are strategically located and may mediate Se's protective effects against Pb toxicity.
Purpose of the Study:
- To investigate the protective mechanism of Selenium (Se) against Pb poisoning in kidneys.
- To emphasize the role of membrane-bound selenoproteins and kidney aging in Se's protective effects.
- To explore the involvement of inflammation and autophagy in Pb-induced kidney aging and Se's intervention.
Main Methods:
- Established Hyline chicken and HK-2 cell models exposed to Pb and Se.
- Analyzed the expression of membrane-bound selenoproteins, pro-inflammatory cytokines (IL-4, IL-12β), anti-inflammatory cytokine (IL-2), and autophagy-related genes (ATG5, Beclin 1, LC3-II, mTOR).
- Investigated the role of Selenoprotein T (SELENOT) by examining its expression and performing knockdown experiments.
Main Results:
- Pb exposure significantly decreased membrane-bound selenoproteins and induced kidney aging, increasing inflammation (IL-4, IL-12β) and autophagy (ATG5, Beclin 1, LC3-II) while decreasing IL-2 and mTOR.
- Se administration significantly reversed these Pb-induced changes, demonstrating a protective effect.
- Selenoprotein T (SELENOT) expression was sensitive to Pb exposure; SELENOT knockdown exacerbated Pb-induced inflammation, autophagy, and senescence, confirming its protective role.
Conclusions:
- Membrane-bound selenoproteins, particularly SELENOT, are crucial in Se's protection against Pb-induced kidney aging.
- SELENOT mitigates Pb toxicity by suppressing inflammation and autophagy, thereby preventing kidney aging.
- These findings highlight membrane-bound selenoproteins as key molecular players and potential therapeutic targets for Pb-induced nephropathy.
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