Sulfur dioxide, a double-faced molecule in mammals

Area of Science:

• Environmental Science
• Toxicology
• Physiology

Background:

• Sulfur dioxide (SO2) is recognized as a significant air pollutant with known detrimental effects on multiple organs.
• Extensive research has documented the toxic impacts of SO2, including oxidative stress, DNA damage, and inflammation.
• Emerging evidence indicates that SO2 is also produced endogenously within mammalian systems.

Purpose of the Study:

• To review the multifaceted biological effects of sulfur dioxide (SO2) in mammals.
• To elucidate the dual role of SO2, encompassing both its toxic and protective functions.
• To consolidate current understanding of endogenous SO2's physiological and pathophysiological relevance.

Main Methods:

• Literature review of existing studies on sulfur dioxide (SO2).
• Analysis of research investigating both exogenous and endogenous sources of SO2.
• Synthesis of data on the toxicological and physiological impacts of SO2.

Main Results:

• Exogenous SO2 exhibits toxicity, causing oxidative damage, DNA damage, and inflammation.
• Endogenous SO2 demonstrates significant protective effects, including antioxidant and anti-inflammatory properties.
• Endogenous SO2 contributes to regulating vascular tone, cardiac function, and exhibits anti-hypertensive and anti-atherogenic effects.

Conclusions:

• Sulfur dioxide (SO2) possesses a dual role in mammalian biology, acting as both a toxicant and a protective agent.
• Endogenous SO2 production is crucial for maintaining physiological balance and mitigating pathological processes.
• Further research into endogenous SO2 mechanisms could reveal novel therapeutic strategies.