Cited by 56Sperm and Testicular FunctionMale Reproductive Health StudiesReproductive Biology and Fertility

Teratozoospermia: Its association with sperm DNA defects, apoptotic alterations, and oxidative stress

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Ammar, Oumaima, Mehdi, Meriem, Muratori, Monica·2020·Andrology

Abstract

This study was carried out to evaluate the level of nuclear sperm DNA damage in men with isolated polymorphic teratozoospermia and examining its relationship with apoptosis and oxidative stress. A total of 89 subjects were divided into two groups: men with isolated teratozoospermia (n = 69) and men with normal semen parameters (n = 20) as controls. Sperm DNA breaks were determined by using acridine orange staining. The proportion of viable spermatozoa with mitochondrial transmembrane depolarization was detected by fluorescence microscopy through the use of MitoPTJC‐1 staining method. Bivariate Annexin V/6‐CFDA analysis was then set out in order to measure the percentage of both viable and dead spermatozoa with phosphatidylserine (PS) externalization. Seminal antioxidant profile (reduced glutathione (GSHr); oxidized glutathione (GSSG); glutathione S‐transferase (GST)) and total protein sulfhydryl (P‐SH) concentrations were measured spectrophotometrically. Men with isolated teratozoospermia, when compared to controls, showed significantly increased level of single sperm DNA breaks and higher proportions of spermatozoa with phosphatidylserine externalization and mitochondrial depolarization. Among the differently studied oxidative stress seminal parameters, the rates of seminal GSHr, GST, and P‐SH were significantly decreased in the teratozoospermic group. However, the seminal rates of GSSG and GST have decreased, but only GST did not show a significant difference. Interestingly, significant correlations were found between the studied apoptotic markers and the rate of atypical sperm forms with the incidences of head abnormalities. Furthermore, positive inter‐correlations were found between sperm DNA defects, impaired seminal antioxidant status, and the apoptotic sperm markers. Such data provide clear evidence that the apoptotic alterations are closely correlated to abnormal sperm morphology and DNA damage. Moreover, decreased seminal antioxidant profile may be a crucial factor involved in the mechanism of sperm cell death‐mediated DNA breaks in teratozoospermic semen.

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  • Pathophysiological studies have shown sometimes controversial associations between sperm morphology and sperm competence (aptitude to undergo the acrosomal reaction, DNA integrity, chromatin condensation, etc.).

    “Sperm morphology assessment has also been examined in numerous pathophysiological studies that have shown sometimes controversial associations between morphology and sperm competence (aptitude to undergo the acrosomal reaction, DNA integrity, chromatin condensation, etc.) [5, 6, 7, 8].”

    From Recommendations for Human Sperm Morphology Assessment in 2025: An Expert Review From the French BLEFCO Group (2026) · cites this paper as [8]

    The Discussion (page unavailable) reports an association between abnormal sperm morphology and DNA damage, while also noting studies that found no significant association. The Introduction links teratozoospermia with chromatin decondensation. Our copy does not establish an association between morphology and the ability to undergo the acrosomal reaction. (LLM, conf=0.84)

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  • Some studies have shown a correlation between sperm morphological defects and nuclear genetic defects, apoptotic alterations, and reactive oxidative stress, which may negatively impact fertility potential.

    “Some studies have shown a correlation between sperm morphological defects and nuclear genetic defects, apoptotic alterations, and reactive oxidative stress, which may negatively impact fertility potential (13-15).”
  • Abnormal sperm morphology in general has shown a correlation with changes in genetic materials, increased rate of apoptosis, overproduction of oxidative stress, and a decrease in antioxidant activities.

    “While some morphological defects are associated with specific functional deficiencies, such as those with tail defects that result in abnormal motility, abnormal sperm morphology, in general, has shown a correlation with changes in genetic materials, increased rate of apoptosis, overproduction of oxidative stress as well as a decrease in antioxidant activities (13-15).”

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Authors
Ammar, O., Mehdi, M., & Muratori, M.
Affiliations
  • Laboratory of Histology Embryology and Cytogenetics (LR 18 ES 40) Faculty of Medicine University of Monastir Monastir Tunisia
  • University of Monastir (TN)
  • University of Florence (IT)
Venue
Andrology
Publisher
Wiley
Published
2020-03-12
Volume
8
Issue
5
Pages
1095-1106
ISSN
  • 2047-2919 (ISSN-L)
  • 2047-2927
OpenAlex
W3007702120
Cited by
56
References
3
Citations by year
2026: 9 · 2025: 14 · 2024: 5 · 2023: 13 · 2022: 9 · 2021: 4 · 2020: 2
FWCI
6.17
Type
journal article
Language
en
Open access
Locations
  • Andrology (publishedVersion)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, cc-by-nd)
Funders
Ministry of Higher Education and Scientific Research
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
  • Health Sciences › Health Professions › General Health Professions › Male Reproductive Health Studies
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
Keywords
teratozoospermia, sperm DNA damage, sperm apoptosis, oxidative stress, glutathione, glutathione S-transferase, mitochondrial depolarization, phosphatidylserine exposure, sperm morphology, male infertility
MeSH terms
Teratozoospermia, Adult, Antioxidants, Humans, Male, Mitochondria, Nucleic Acid Denaturation, Phosphatidylserines, Prospective Studies, Spermatozoa, Sulfhydryl Compounds, Biomarkers, Apoptosis, Oxidative Stress, DNA Breaks, Semen Analysis

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