Related Experiment Video
Updated: Jul 5, 2025
08:48
Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
Published on: April 21, 2022
2.5K
Small noncoding RNAs and sperm nuclear basic proteins reflect the environmental impact on germ cells
Giulio Ferrero1,2, Rosaria Festa3, Laura Follia1
1Department of Clinical and Biological Sciences, University of Turin, Regione Gonzole 10, 10043, Orbassano, Turin, Italy.
Molecular Medicine (Cambridge, Mass.)
|January 19, 2024
Summary
Environmental pollution impacts sperm health, causing epigenetic changes not visible in standard tests. Molecular analysis reveals altered sperm DNA protection and microRNA levels in polluted areas.
Area of Science:
- Reproductive Biology
- Environmental Health
- Epigenetics
Background:
- Conventional spermiogram analysis has limitations in detecting subtle sperm alterations.
- Molecular techniques offer complementary insights into sperm fertilizing potential.
- Environmental pollution is a growing concern for male reproductive health.
Purpose of the Study:
- To investigate the molecular impact of environmental pollution on sperm quality.
- To identify epigenetic alterations in sperm associated with pollution exposure.
- To compare molecular profiles of sperm from low and high-pollution areas.
Main Methods:
- Multilevel molecular profiling of male germ cells using small RNA sequencing.
- Analysis of sperm nuclear basic proteins (protamine/histone ratio).
- Assessment of 33 microRNAs and Piwi-interacting RNA levels in sperm.
Main Results:
- Sperm from high-pollution areas showed increased immature/immune cells and lower protamine/histone ratio.
- Reduced DNA protection by sperm nuclear basic proteins and altered copper/zinc ratio were observed in polluted areas.
- Significant differences in sperm microRNA levels and decreased Piwi-interacting RNA were linked to pollution exposure.
Conclusions:
- Pollution-driven epigenetic alterations in sperm are detectable through molecular profiling.
- These molecular changes are not discernible by conventional spermiogram analysis.
- Molecular techniques provide a deeper understanding of pollution's effects on male fertility.
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