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Molecular Insights: Transitioning Fertility Research from the Laboratory to Clinical Practice

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pathology, Diagnostics, and Therapeutics".

Deadline for manuscript submissions: closed (20 December 2025) | Viewed by 8019

Special Issue Editor


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Guest Editor
First Department of Obstetrics and Gynecology, Alexandra Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
Interests: eeproductive medicine; early pregnancy; assisted reproduction techniques; recurrent implantation failure; gynecological ultrasound; infertility

Special Issue Information

Dear Colleagues,

Infertility affects approximately 15% of couples globally and constitutes a major stressing factor for couples seeking to conceive. Advancements in molecular biology have significantly enhanced our understanding of human fertility and transformed the landscape of fertility treatment. More analytically, recent research contributes to the understanding of the molecular mechanisms contributing to gene expression, protein expression, oogenesis, spermatogenesis, oocyte maturation, fertilization, implantation, and, ultimately, ongoing pregnancy. Apart from understanding the mechanisms, various treatments, supplements, and endocrine-disrupting chemicals used every day further modulate or dysregulate these processes. Reactive oxygen species and oxidative stress can result in precipitous pathologies affecting male and female reproduction, leading to decreased oocyte quality, abnormal motility and morphology of spermatozoa, decreased fertilization rates, and decreased pregnancy rates.  However, despite the remarkable progress made in laboratory settings, the transition of these innovations into clinical practice presents a myriad of challenges.

One primary challenge in the transition from the lab to the clinic is the implementation of these novel findings in the complex and multivariate scope of human reproduction. This Special Issue aims to outline a framework for transitioning molecular insights in fertility research into practical strategies that can benefit individuals facing reproductive challenges by improving diagnostic accuracy, treatment efficacy, and patient outcomes in fertility management. With this scope, the primary objectives of this Special Issue include the following:

  • Identification of barriers in the implementation of novel techniques.
  • Targeted therapies or implementations that improve and personalize fertility treatments.
  • Novel molecular techniques focusing on the improvement of patients’ care.
  • Understanding the molecular pathways of supplements or endocrine-disrupting chemicals that impact gametogenesis, oxidative stress, and reproductive outcomes.
  • Gene expression or protein expression associated with the understanding or treatment of male and female infertility.
  • Molecular basis of adverse pregnancy outcomes after ART.

This Special Issue is supervised by Prof. Dr. Ekaterini Domali and assisted by Dr. Sofoklis Stavros and Dr. Anastasios Potiris (Third Department of Obstetrics and Gynecology, University General Hospital “ATTIKON”, Medical School, National and Kapodistrian University of Athens). Ultimately, this Special Issue seeks to create a structured pathway that not only enhances scientific understanding but also translates into tangible benefits for patients. This approach not only aims to increase access to innovative treatments but also to ensure that all patients receive the highest standard of care in their fertility journeys.

Prof. Dr. Ekaterini Domali
Guest Editor

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Keywords

  • IVF/ICSI
  • male infertility
  • female infertility
  • fertility outcomes
  • endocrine disruptors
  • oxidative and reductive stress
  • molecular biology
  • biomarkers
  • proteomics, metabolomics, and transcriptomics
  • cell lines
  • early pregnancy

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Published Papers (3 papers)

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Research

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20 pages, 2197 KB  
Article
The Utility of Sperm DNA Fragmentation as a Diagnostic Tool for Male Infertility and Its Predictive Value for Assisted Reproductive Technology Outcomes
by Coral Zurera-Egea, Sílvia Mateo, Sergi Novo, Marta Asensio, Montserrat Boada, Marta Antich, Sergi Rovira, Zaida Sarrate, Joan Blanco and Ester Anton
Int. J. Mol. Sci. 2025, 26(13), 6314; https://doi.org/10.3390/ijms26136314 - 30 Jun 2025
Cited by 5 | Viewed by 5836
Abstract
Standard semen parameters remain the cornerstone of male infertility evaluation, though they often poorly reflect the likelihood of success in assisted reproductive technology (ART). This study evaluates sperm DNA fragmentation (SDF) as a diagnostic tool for male infertility and predictive biomarker for ART [...] Read more.
Standard semen parameters remain the cornerstone of male infertility evaluation, though they often poorly reflect the likelihood of success in assisted reproductive technology (ART). This study evaluates sperm DNA fragmentation (SDF) as a diagnostic tool for male infertility and predictive biomarker for ART success. Semen samples were collected from 20 fertile donors and 40 infertile patients with abnormal semen parameters. A fraction of each sample was used for SDF assessment via TUNEL assay and flow cytometry, while the remaining portion was processed for conventional semen analysis and ART. Infertile patients exhibited higher SDF levels (32.77 ± 13.61%) compared to donors (22.19 ± 8.37%; p < 0.01), a difference that remained statistically significant across all subgroups stratified by semen parameters. Additionally, significant correlations were obtained between the percentage of SDF and sperm count (r = −0.4036), motility (r = −0.6377), and morphology (r = −0.2783). Regarding ART outcomes, patients with low-quality embryos exhibited higher SDF levels compared to those with high-quality embryos (30.02 ± 12.52% vs. 23.16 ± 8.41%; p = 0.0036). Receiver operating characteristic (ROC) curve analysis revealed an area under the curve (AUC) above 0.7 for the classification of male infertility as well as the assessment of embryo quality. Overall, our results support the utility of SDF as both a diagnostic biomarker for male infertility and a predictive indicator of embryo quality in ART, particularly in the presence of an oocyte-related female factor. Full article
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Review

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17 pages, 1932 KB  
Review
Nanoparticle-Based Approaches for Enhancing In Vitro Fertilization in Animal Reproduction
by Elżbieta Gałęska, Alicja Kowalczyk, Marko Samardžija, Gordana Gregurić Gračner, Marcjanna Wrzecińska, Jose Pedro Araujo, José Ángel Hernández Malagón, Mercedes Camiña, Ewa Czerniawska-Piątkowska and Zbigniew Dobrzański
Int. J. Mol. Sci. 2026, 27(6), 2747; https://doi.org/10.3390/ijms27062747 - 18 Mar 2026
Viewed by 490
Abstract
Nanotechnology, based on nanoparticles, has become an emerging interdisciplinary tool in reproductive biotechnology, offering innovative opportunities to improve fertilization efficiency and reproductive performance in farm animals. The purpose of this review is to provide an updated synthesis of current research on nanoparticle-based approaches [...] Read more.
Nanotechnology, based on nanoparticles, has become an emerging interdisciplinary tool in reproductive biotechnology, offering innovative opportunities to improve fertilization efficiency and reproductive performance in farm animals. The purpose of this review is to provide an updated synthesis of current research on nanoparticle-based approaches that enhance in vitro fertilization outcomes and other assisted reproductive technologies. The focus is on the biological mechanisms, potential benefits, and limitations of nanoparticle use in animal reproduction. Nanoparticles—including gold, silver, zinc oxide, selenium, and magnetic iron oxide—exhibit distinctive physicochemical properties that enable targeted interactions with gametes and reproductive cells. When used in semen extenders or culture media, nanoparticles improve sperm motility, acrosome and membrane integrity, and reduce oxidative stress and apoptosis. These effects contribute to enhanced fertilization rates and higher embryo developmental competence. In addition, nanoparticles can function as carriers for hormones, antioxidants, and growth factors, stabilizing reagents essential for oocyte maturation, sperm capacitation, and early embryo culture. The review also discusses nanopurification (selectively isolating and removing particles) and nanosorting (separating or organizing nanoscale objects) techniques that allow for non-invasive selection of viable gametes, and fluorescence- and magnet-assisted sorting systems that increase precision in sperm sexing. The mechanical aspects of nanoparticle–cell interactions are analyzed, emphasizing the influence of particle size, dose, and surface modification on both biological efficacy and cytotoxicity. Safety, toxicological concerns, and regulatory frameworks—including International Organization for Standardization (ISO) standards and European Commission recommendations—are critically reviewed to highlight the need for harmonized biocompatibility criteria. Although nanoparticle use in animal reproduction remains largely experimental, accumulated evidence demonstrates its potential to improve reproductive efficiency and reduce economic losses. Integrating nanoparticle-based systems with existing reproduction platforms may represent a transformative step toward sustainable and precision-driven livestock breeding. Full article
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17 pages, 900 KB  
Review
The Impact of Selenium Exposure During Pregnancy on Risk for Miscarriage: A Systematic Review
by Stavroula-Ioanna Kyriakou, Ermioni Tsarna, Nikolina Stachika, Christina Dalla, Anastasios Potiris, Sofoklis Stavros and Panagiotis Christopoulos
Int. J. Mol. Sci. 2026, 27(2), 968; https://doi.org/10.3390/ijms27020968 - 18 Jan 2026
Viewed by 789
Abstract
Selenium (Se) is an antioxidant essential trace element influencing inflammatory and immune pathways. This systematic review aimed to evaluate the role of maternal Se status during pregnancy in miscarriage risk. A systematic search of PubMed and Embase up to July 2024 was conducted [...] Read more.
Selenium (Se) is an antioxidant essential trace element influencing inflammatory and immune pathways. This systematic review aimed to evaluate the role of maternal Se status during pregnancy in miscarriage risk. A systematic search of PubMed and Embase up to July 2024 was conducted to identify relevant original research studies in English. Available evidence was qualitatively synthesized and predefined sources of bias were assessed. Of 2345 studies identified, 421 full texts were assessed and 14 were included, encompassing 2309 pregnancies. Despite notable methodological limitations across several studies, current evidence indicates that maternal blood Se concentrations are lower among women who experience miscarriage compared to those with uncomplicated pregnancies. Findings regarding placental Se levels were inconsistent, but important methodological issues were noted. Environmental Se exposure was investigated in a single low-powered study, which did not demonstrate a statistically significant association. Potential interactions between Se status, co-exposure to other environmental or lifestyle factors, and effect modification remain insufficiently explored. Adequate maternal Se status during early gestation may reduce miscarriage risk by mitigating oxidative stress and ferroptosis, supporting immune regulation, and modulating thyroid autoimmunity and function. However, causal inference cannot be established due to the absence of randomized interventional evidence. Full article
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