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Correlation Between Protamine-2 and miRNA-122 in Sperm from Heroin-addicted Men: A Case-Control Study
Zohreh Nazmara1, Mohammad Najafi2, Mansoureh Movahedin3
1Department of Anatomical Sciences, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Zohre.nazmara@gmail.com.
Urology Journal
|August 5, 2020
Summary
Heroin addiction significantly impacts male fertility by reducing protamine-2 levels and altering miRNA-122 in seminal plasma, leading to reduced sperm quality. This study highlights potential mechanisms behind heroin-induced male infertility.
Area of Science:
- Reproductive Biology
- Toxicology
- Genetics
Background:
- Recreational drug use, particularly heroin, is a known factor affecting male fertility.
- The specific mechanisms by which heroin smoke impacts sperm are not fully understood.
- Protamine-2 is crucial for sperm DNA packaging, and its deficiency is linked to infertility.
Purpose of the Study:
- To investigate the levels of protamine-2 gene and protein, and miRNA-122 in seminal plasma of heroin-addicted men.
- To correlate these molecular changes with semen analysis findings.
- To elucidate the impact of heroin abuse on mature spermatozoa.
Main Methods:
- A case-control study comparing 24 healthy men with 24 heroin-addicted men.
- Semen analysis performed using computer-assisted sperm analysis (WHO 2010 criteria).
- Protamine-2 gene expression measured by real-time sqPCR; protein by SDS-Page and western blotting.
- miRNA-122 levels quantified in seminal plasma using real-time sqPCR.
Main Results:
- Heroin-addicted men showed significantly lower protamine-2 gene and protein levels compared to healthy controls.
- Seminal plasma miRNA-122 levels were significantly higher in addicted men.
- Addicted men exhibited poorer semen quality, including reduced motility and increased white blood cell count.
Conclusions:
- Heroin abuse can lead to male infertility through mechanisms including leukocytospermia, asthenozoospermia, and protamine deficiency.
- Alterations in seminal plasma miRNA profiles are associated with heroin-induced male infertility.
- This study provides insights into the molecular basis of heroin's detrimental effects on male reproductive health.
