Cellular and molecular mechanisms of xenobiotics-induced premature senescence

Area of Science:

• Cellular Biology
• Toxicology
• Gerontology

Background:

• Premature senescence shares characteristics with replicative senescence, including morphology and gene expression.
• Exposure to xenobiotics such as environmental pollutants, peroxides, and anticancer drugs can trigger premature senescence.
• The precise molecular mechanisms driving the onset and stabilization of senescence remain unclear.

Purpose of the Study:

• To review and summarize the potential cellular and molecular mechanisms behind xenobiotics-induced premature senescence.
• To elucidate the pathways involved in xenobiotics-induced cellular aging.

Main Methods:

• Literature review of studies on xenobiotics and premature senescence.
• Analysis of proposed cellular and molecular mechanisms.
• Synthesis of findings related to oxidative stress, DNA damage, and signaling pathways.

Main Results:

• Xenobiotics can induce premature senescence through various pathways.
• Key mechanisms include the induction of reactive oxygen species (ROS), activation of tumor suppressors, DNA damage, calcium homeostasis imbalance, transforming growth factor-β (TGF-β) activation, and aryl hydrocarbon receptor (AHR) pathway blockage.
• These factors contribute to the onset and stabilization of premature senescence.

Conclusions:

• A comprehensive understanding of xenobiotics-induced senescence mechanisms is crucial.
• Elucidating these pathways could lead to novel therapeutic strategies for age-related diseases.
• This knowledge may contribute to extending healthy lifespan by targeting senescence-related pathologies.