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Published in: Reproductive Biology and Endocrinology 1/2014

Open Access 01-12-2014 | Research

Infertile men older than 40 years are at higher risk of sperm DNA damage

Authors: Saad Alshahrani, Ashok Agarwal, Mourad Assidi, Adel M Abuzenadah, Damayanthi Durairajanayagam, Ahmet Ayaz, Rakesh Sharma, Edmund Sabanegh

Published in: Reproductive Biology and Endocrinology | Issue 1/2014

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Abstract

Background

The effect of paternal age on semen quality is controversial. In this retrospective study, the aim was to investigate the effects of advancing age on sperm parameters including reactive oxygen species (ROS), total antioxidant capacity (TAC) and sperm DNA damage in infertile men. We also examined whether paternal age >40 y is associated with higher risk of sperm DNA damage.

Methods

A total of 472 infertile men presenting for infertility were divided into 4 age groups: group A: patients ≤ 30 y; group B: patients 31- 40 y, group C: ≤ 40 y and group D: patients >40 y. The following tests were performed - semen analysis according to WHO 2010 criteria, seminal ROS by chemiluminescence, TAC by colorimetric assay and sperm DNA damage by TUNEL assay - and the results were compared amongst the 4 age groups.

Results

There was no statistical difference in conventional semen parameters, TAC and ROS with advancing paternal age as well as between different age groups. However, a significant negative association was noted between sperm DNA damage and advancing paternal age. Men >40 y showed higher levels of sperm DNA damage (24.4 ± 18.5%) compared to younger men (<30 y; 16.7 ± 11.2%; p <0.05).

Conclusions

Infertile men over the age of 40 y have a greater percentage of sperm DNA fragmentation compared to infertile men aged 40 y and below. Advanced paternal age (>40 y) may increase the risk of sperm DNA damage in infertile men.
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Metadata
Title
Infertile men older than 40 years are at higher risk of sperm DNA damage
Authors
Saad Alshahrani
Ashok Agarwal
Mourad Assidi
Adel M Abuzenadah
Damayanthi Durairajanayagam
Ahmet Ayaz
Rakesh Sharma
Edmund Sabanegh
Publication date
01-12-2014
Publisher
BioMed Central
Published in
Reproductive Biology and Endocrinology / Issue 1/2014
Electronic ISSN: 1477-7827
DOI
https://doi.org/10.1186/1477-7827-12-103

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