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Reproductive Biology and Endocrinology
Published in: Reproductive Biology and Endocrinology 1/2018

Open Access 01-12-2018 | Research

Analysis of human sperm DNA fragmentation index (DFI) related factors: a report of 1010 subfertile men in China

Authors: Jin-Chun Lu, Jun Jing, Li Chen, Yi-Feng Ge, Rui-Xiang Feng, Yuan-Jiao Liang, Bing Yao

Published in: Reproductive Biology and Endocrinology | Issue 1/2018

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Abstract

Background

Many factors may lead to sperm DNA damage. However, it is little known that the correlations of sperm DNA damage with obesity-associated markers, and reproductive hormones and lipids levels in serum and seminal plasma.

Methods

In our prospective study, a total of 1 010 subfertile men, aged from 18 to 50 years old, were enrolled from August 2012 through June 2015. Their obesity-associated markers, semen parameters, sperm acrosomal enzyme activity, seminal plasma biochemical markers, and reproductive hormones and lipids levels in serum and seminal plasma were detected. Sperm DNA fragmentation index (DFI) was determined by sperm chromatin structure assay. The correlations between DFI and each of the above-mentioned variables were analyzed.

Results

Spearman correlation analysis showed that sperm DFI was positively related to age and abstinence time (P<0.001). Sperm DFI was also positively related to semen volume and percent of abnormal sperm head (P<0.001), while negatively related to sperm concentration, progressive motility (PR), sperm motility, total normal-progressively motile sperm count (TNPMS), percent of normal sperm morphology (NSM), percent of intact acrosome and acrosomal enzyme activity (P<0.001). Sperm DFI was positively related to seminal plasma zinc level (P<0.001) but unrelated to seminal plasma total α-glucotase, γ-glutamyl transpeptidase (GGT) and fructose levels. There was no any correlation between sperm DFI and obesity-associated markers such as body mass index (BMI), waist-to-hip ratio (WHR), waist circumference (WC) and waist-to-height ratio (WHtR), and serum lipids levels, but there was positive correlation between sperm DFI and seminal plasma triglyceride (TG) and total cholesterol (TC) levels (P<0.001). Sperm DFI was positively related to serum luteinizing hormone (LH) and follicle stimulating hormone (FSH) levels and seminal plasma FSH and estradiol (E2) levels (P<0.001), but unrelated to serum and seminal plasma testosterone (T) levels. The multivariate regression analysis for the variables which were significantly correlated with sperm DFI in Spearman correlation analysis showed that age, semen volume, sperm concentration, progressive motility, TNPMS and intact acrosome were independently correlated with sperm DFI.

Conclusions

There are many potential factors associated with sperm DFI, including age, abstinence time, spermatogenesis and maturation, seminal plasma lipids and reproductive hormones levels. However, the potential effects of seminal plasma lipids and reproductive hormones on sperm DNA damage need still to be demonstrated by the studies with scientific design and a large size of samples.
Appendix
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Metadata
Title
Analysis of human sperm DNA fragmentation index (DFI) related factors: a report of 1010 subfertile men in China
Authors
Jin-Chun Lu
Jun Jing
Li Chen
Yi-Feng Ge
Rui-Xiang Feng
Yuan-Jiao Liang
Bing Yao
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Reproductive Biology and Endocrinology / Issue 1/2018
Electronic ISSN: 1477-7827
DOI
https://doi.org/10.1186/s12958-018-0345-y

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