News | Air Pollution and Male Reproductive Health: New Study Examines Oxidative Stress
A review published in Antioxidants examined the potential effects of air pollution on male reproductive parameters and sexual health. Researchers explored its clinical effects on male reproductive outcomes and the role of oxidative stress.
Background
Studies indicate global declines in male fertility, sperm counts, and sperm concentrations. Potential causes include lifestyle, environmental exposure, and prenatal conditions. Rising male infertility places a substantial socioeconomic burden on society, making its multifactorial causes an important area of study.
Air pollution is a major global health problem affecting nearly 2.4 billion people and causing more than 6.4 million deaths each year. Primary and secondary air pollutants are complex and come from many natural and human sources. Exposure to pollutants such as carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) is known to cause short- and long-term health problems, especially respiratory and cardiovascular disease.
Studies of air pollution and male fertility have produced mixed results. Some show negative effects on semen quality, motility, concentration, morphology, and DNA integrity, while others find no association. Further research is therefore needed.
Effects on Male Reproductive Parameters: Evidence From Animal and Human Studies
Human and animal studies have examined links between air pollution and basic and advanced male reproductive parameters. Animal studies show that PM2.5 exposure reduces sperm count and motility and increases abnormal morphology in rodents, while findings for PM10 and sperm morphology are inconsistent. Pollutants such as sulfur dioxide (SO2) are also associated with increased testicular oxidative stress, fewer spermatogonial stem cells, and lower sperm counts. Exposure timing and season influence these results, with possible mechanisms including altered hormonal balance, oxidative stress, and inflammation.
Human studies suggest that air pollution may reduce semen quality and affect semen volume, sperm concentration, motility, and morphology. Most studies report adverse effects of common pollutants on sperm parameters, particularly in spring and fall, but further research is needed to confirm these findings.
Human and animal research also suggests that pollutant exposure may affect immediate reproductive potential and cause epigenetic changes in male offspring. Environmental pollutants can cause DNA damage and fragmentation, impairing sperm quality and contributing to adverse reproductive outcomes.
Effects on Male Sexual Health
Studies have found a positive association between air pollution and erectile dysfunction. Animal research also suggests that PM2.5 exposure may be associated with sexual dysfunction. Long-term air pollution exposure is linked to increased risks of depression and anxiety, including effects on men's mental health. Exposure to bisphenol A, considered an air pollutant, is also associated with an increased risk of male sexual dysfunction.
Effects on Reproductive Outcomes
Air pollution has been associated with lower pregnancy rates among patients undergoing in vitro fertilization (IVF), although findings differ across populations and study methods. These differences may reflect retrospective study designs, population backgrounds, and individual variation in exposure.
Mechanisms
Air pollutants can enter the body through inhalation, skin absorption, or ingestion and affect male fertility through oxidative stress, inflammation, apoptosis, and disruption of the blood-testis barrier. Long-term exposure may generate reactive oxygen species (ROS), causing sperm damage and disrupting hormonal regulation, thereby reducing reproductive potential.
Conclusion
Air pollution may adversely affect male reproductive parameters, sexual health, and reproductive outcomes through multiple mechanisms. Rising male infertility and current research findings highlight the need for greater awareness, comprehensive study, and regulatory action to reduce the effects of air pollution on male reproductive potential.
News | Air Pollution and Male Reproductive Health: New Study Examines Oxidative Stress
News | Air Pollution and Male Reproductive Health: New Study Examines Oxidative Stress
A review published in Antioxidants examined the potential effects of air pollution on male reproductive parameters and sexual health. Researchers explored its clinical effects on male reproductive outcomes and the role of oxidative stress.
Background
Studies indicate global declines in male fertility, sperm counts, and sperm concentrations. Potential causes include lifestyle, environmental exposure, and prenatal conditions. Rising male infertility places a substantial socioeconomic burden on society, making its multifactorial causes an important area of study.
Air pollution is a major global health problem affecting nearly 2.4 billion people and causing more than 6.4 million deaths each year. Primary and secondary air pollutants are complex and come from many natural and human sources. Exposure to pollutants such as carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) is known to cause short- and long-term health problems, especially respiratory and cardiovascular disease.
Studies of air pollution and male fertility have produced mixed results. Some show negative effects on semen quality, motility, concentration, morphology, and DNA integrity, while others find no association. Further research is therefore needed.
Effects on Male Reproductive Parameters: Evidence From Animal and Human Studies
Human and animal studies have examined links between air pollution and basic and advanced male reproductive parameters. Animal studies show that PM2.5 exposure reduces sperm count and motility and increases abnormal morphology in rodents, while findings for PM10 and sperm morphology are inconsistent. Pollutants such as sulfur dioxide (SO2) are also associated with increased testicular oxidative stress, fewer spermatogonial stem cells, and lower sperm counts. Exposure timing and season influence these results, with possible mechanisms including altered hormonal balance, oxidative stress, and inflammation.
Human studies suggest that air pollution may reduce semen quality and affect semen volume, sperm concentration, motility, and morphology. Most studies report adverse effects of common pollutants on sperm parameters, particularly in spring and fall, but further research is needed to confirm these findings.
Human and animal research also suggests that pollutant exposure may affect immediate reproductive potential and cause epigenetic changes in male offspring. Environmental pollutants can cause DNA damage and fragmentation, impairing sperm quality and contributing to adverse reproductive outcomes.
Effects on Male Sexual Health
Studies have found a positive association between air pollution and erectile dysfunction. Animal research also suggests that PM2.5 exposure may be associated with sexual dysfunction. Long-term air pollution exposure is linked to increased risks of depression and anxiety, including effects on men's mental health. Exposure to bisphenol A, considered an air pollutant, is also associated with an increased risk of male sexual dysfunction.
Effects on Reproductive Outcomes
Air pollution has been associated with lower pregnancy rates among patients undergoing in vitro fertilization (IVF), although findings differ across populations and study methods. These differences may reflect retrospective study designs, population backgrounds, and individual variation in exposure.
Mechanisms
Air pollutants can enter the body through inhalation, skin absorption, or ingestion and affect male fertility through oxidative stress, inflammation, apoptosis, and disruption of the blood-testis barrier. Long-term exposure may generate reactive oxygen species (ROS), causing sperm damage and disrupting hormonal regulation, thereby reducing reproductive potential.
Conclusion
Air pollution may adversely affect male reproductive parameters, sexual health, and reproductive outcomes through multiple mechanisms. Rising male infertility and current research findings highlight the need for greater awareness, comprehensive study, and regulatory action to reduce the effects of air pollution on male reproductive potential.
Story source:
Collected online