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Hungerford AJ, Bakos HW, Aitken RJ. Addition of Vitamin C Mitigates the Loss of Antioxidant Capacity, Vitality and DNA Integrity in Cryopreserved Human Semen Samples. Antioxidants (Basel) 2024; 13:247. [PMID: 38397845 PMCID: PMC10885938 DOI: 10.3390/antiox13020247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/14/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024] Open
Abstract
Cryopreservation of human spermatozoa is a necessity for males suffering from infertility who cannot produce fresh semen for insemination. However, current ART cryopreservation protocols are associated with losses of sperm motility, vitality and DNA integrity, which are thought to be linked to the induction of oxidative damage and the toxic properties of commercial cryoprotectants (CPAs). Preventing or mitigating these losses would be hugely beneficial to sperm survival during ART. Therefore, in this in vitro investigation, lipid peroxidation, production of reactive oxygen species, movement characteristics, antioxidant capacity, vitality, and DNA integrity were examined in semen samples both pre- and post-cryopreservation with CPA supplementation. The findings revealed a 50% reduction in antioxidant capacity with CPA addition, which was accompanied by significant increases in generation of reactive oxygen species and formation of lipid aldehydes. These changes were, in turn, correlated with reductions in sperm viability, motility and DNA integrity. Antioxidant supplementation generated bell-shaped dose-response curves with both resveratrol and vitamin C, emphasising the vulnerability of these cells to both oxidative and reductive stress. At the optimal dose, vitamin C was able to significantly enhance vitality and reduce DNA damage recorded in cryopreserved human spermatozoa. An improvement in sperm motility did not reach statistical significance, possibly because additional pathophysiological mechanisms limit the potential effectiveness of antioxidants in rescuing this aspect of sperm function. The vulnerability of human spermatozoa to reductive stress and the complex nature of sperm cryoinjury will present major challenges in creating the next generation of cryoprotective media.
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Affiliation(s)
- Alena J. Hungerford
- School of Environmental and Life Sciences, College of Engineering, Science and Environmental Science, University of Newcastle, Callaghan, NSW 2308, Australia; (A.J.H.); (H.W.B.)
| | - Hassan W. Bakos
- School of Environmental and Life Sciences, College of Engineering, Science and Environmental Science, University of Newcastle, Callaghan, NSW 2308, Australia; (A.J.H.); (H.W.B.)
- Memphasys Ltd., Sydney, NSW 2140, Australia
| | - Robert J. Aitken
- School of Environmental and Life Sciences, College of Engineering, Science and Environmental Science, University of Newcastle, Callaghan, NSW 2308, Australia; (A.J.H.); (H.W.B.)
- Memphasys Ltd., Sydney, NSW 2140, Australia
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2
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Behdarvandian P, Nasr-Esfahani A, Tavalaee M, Pashaei K, Naderi N, Darmishonnejad Z, Hallak J, Aitken RJ, Gharagozloo P, Drevet JR, Nasr-Esfahani MH. Sperm chromatin structure assay (SCSA ®) and flow cytometry-assisted TUNEL assay provide a concordant assessment of sperm DNA fragmentation as a function of age in a large cohort of approximately 10,000 patients. Basic Clin Androl 2023; 33:33. [PMID: 38030992 PMCID: PMC10688019 DOI: 10.1186/s12610-023-00208-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 09/19/2023] [Indexed: 12/01/2023] Open
Abstract
BACKGROUND Sperm DNA integrity is increasingly seen as a critical characteristic determining reproductive success, both in natural reproduction and in assisted reproductive technologies (ART). Despite this awareness, sperm DNA and nuclear integrity tests are still not part of routine examinations for either infertile men or fertile men wishing to assess their reproductive capacity. This is not due to the unavailability of DNA and sperm nuclear integrity tests. On the contrary, several relevant but distinct tests are available and have been used in many clinical trials, which has led to conflicting results and confusion. The reasons for this are mainly the lack of standardization between different clinics and between the tests themselves. In addition, the small number of samples analyzed in these trials has often weakened the value of the analyses performed. In the present work, we used a large cohort of semen samples, covering a wide age range, which were simultaneously evaluated for sperm DNA fragmentation (SDF) using two of the most frequently used SDF assays, namely the TUNEL assay and the sperm chromatin structure assay (SCSA®). At the same time, as standard seminal parameters (sperm motility, sperm morphology, sperm count) were available for these samples, correlations between age, SDF and conventional seminal parameters were analyzed. RESULTS We show that the SCSA® and TUNEL assessments of SDF produce concordant data. However, the SDF assessed by TUNEL is systematically lower than that assessed by SCSA®. Regardless of the test used, the SDF increases steadily during aging, while the HDS parameter (High DNA stainability assessed via SCSA®) remains unchanged. In the cohort analyzed, conventional sperm parameters do not seem to discriminate with aging. Only sperm volume and motility were significantly lower in the oldest age group analyzed [50-59 years of age]. CONCLUSIONS In the large cohort analyzed, SDF is an age-dependent parameter, increasing linearly with aging. The SCSA® assessment of SDF and the flow cytometry-assisted TUNEL assessment are well correlated, although TUNEL is less sensitive than SCSA®. This difference in sensitivity should be taken into account in the final assessment of the true level of fragmentation of the sperm nucleus of a given sample. The classical sperm parameters (motility, morphology, sperm count) do not change dramatically with age, making them inadequate to assess the fertility potential of an individual.
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Affiliation(s)
- Paria Behdarvandian
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran
| | - Ali Nasr-Esfahani
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran.
- Isfahan Fertility and Infertility Center, Isfahan, Iran.
| | - Marziyeh Tavalaee
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran
| | - Kosar Pashaei
- Isfahan Fertility and Infertility Center, Isfahan, Iran
| | - Nushin Naderi
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran
| | - Zahra Darmishonnejad
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran
| | - Jorge Hallak
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Research Andrology Laboratory, Sao Paulo, 04534-011, Brazil
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, School of Environmental and Life Sciences, College of Engineering Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia
| | | | - Joël R Drevet
- Faculty of Medicine, Université Clermont Auvergne, GReD Institute, CRBC, 63000, Clermont-Ferrand, France.
| | - Mohammad Hossein Nasr-Esfahani
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, 8165131378, Iran.
- Isfahan Fertility and Infertility Center, Isfahan, Iran.
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3
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Peden CJ, Aggarwal G, Aitken RJ, Anderson ID, Balfour A, Foss NB, Cooper Z, Dhesi JK, French WB, Grant MC, Hammarqvist F, Hare SP, Havens JM, Holena DN, Hübner M, Johnston C, Kim JS, Lees NP, Ljungqvist O, Lobo DN, Mohseni S, Ordoñez CA, Quiney N, Sharoky C, Urman RD, Wick E, Wu CL, Young-Fadok T, Scott MJ. Enhanced Recovery After Surgery (ERAS®) Society Consensus Guidelines for Emergency Laparotomy Part 3: Organizational Aspects and General Considerations for Management of the Emergency Laparotomy Patient. World J Surg 2023:10.1007/s00268-023-07039-9. [PMID: 37277506 DOI: 10.1007/s00268-023-07039-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2023] [Indexed: 06/07/2023]
Abstract
BACKGROUND This is Part 3 of the first consensus guidelines for optimal care of patients undergoing emergency laparotomy using an enhanced recovery after surgery (ERAS) approach. This paper addresses organizational aspects of care. METHODS Experts in management of the high-risk and emergency general surgical patient were invited to contribute by the International ERAS® Society. PubMed, Cochrane, Embase, and MEDLINE database searches were performed for ERAS elements and relevant specific topics. Studies were selected with particular attention to randomized clinical trials, systematic reviews, meta-analyses and large cohort studies, and reviewed and graded using the Grading of Recommendations, Assessment, Development and Evaluation system. Recommendations were made on the best level of evidence, or extrapolation from studies on elective patients when appropriate. A modified Delphi method was used to validate final recommendations. RESULTS Components of organizational aspects of care were considered. Consensus was reached after three rounds of a modified Delphi process. CONCLUSIONS These guidelines are based on best current available evidence for organizational aspects of an ERAS® approach to patients undergoing emergency laparotomy and include discussion of less common aspects of care for the surgical patient, including end-of-life issues. These guidelines are not exhaustive but pull together evidence on important components of care for this high-risk patient population. As much of the evidence is extrapolated from elective surgery or emergency general surgery (not specifically laparotomy), many of the components need further evaluation in future studies.
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Affiliation(s)
- Carol J Peden
- Department of Anesthesiology Keck School of Medicine, University of Southern California, 2020 Zonal Avenue IRD 322, Los Angeles, CA, 90033, USA.
- Department of Anesthesiology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA, 19104, USA.
| | - Geeta Aggarwal
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Egerton Road, Guildford, Surrey, GU5 7XX, UK
| | - Robert J Aitken
- Sir Charles Gardiner Hospital, Hospital Avenue, Nedlands, WA, 6009, Australia
| | - Iain D Anderson
- Salford Royal NHS Foundation Trust, Stott La, Salford, M6 8HD, UK
- University of Manchester, Manchester, UK
| | - Angie Balfour
- Western General Hospital, NHS Lothian, Edinburgh, EH4 2XU, Scotland
| | | | - Zara Cooper
- Center for Surgery and Public Health, Harvard Medical School, Brigham and Women's Hospital, 1620 Tremont Street, Boston, MA, 02120, USA
- Division of Trauma, Burns, Surgical Critical Care, and Emergency Surgery, Brigham and Women's Hospital, 1620 Tremont Street, Boston, MA, 02120, USA
| | - Jugdeep K Dhesi
- Perioperative Medicine for Older People Undergoing Surgery (POPS), Guy's and St Thomas' NHS Foundation Trust, London, UK
- Faculty of Life Sciences and Medicine, King's College London, London, UK
- Research Department of Targeted Intervention, Division of Surgery & Interventional Science, University College London, London, UK
| | - W Brenton French
- Department of Surgery, Virginia Commonwealth University Health System, 1200 E. Broad Street, Richmond, VA, 23298, USA
| | - Michael C Grant
- Department of Anesthesiology and Critical Care Medicine, Department of Surgery, The Johns Hopkins University School of Medicine, 1800 Orleans Street, Baltimore, MD, 21287, USA
| | - Folke Hammarqvist
- Department of Emergency and Trauma Surgery, Karolinska University Hospital, CLINTEC, Karolinska Institutet, Stockholm, Sweden
- Karolinska University Hospital Huddinge, Hälsovägen 3. B85, S 141 86, Stockholm, Sweden
| | - Sarah P Hare
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Medway Maritime Hospital, Windmill Road, Gillingham, Kent, ME7 5NY, UK
| | - Joaquim M Havens
- Division of Trauma, Burns and Surgical Critical Care, Brigham and Women's Hospital, 75 Francis Street, Boston, MA, 02115, USA
| | - Daniel N Holena
- Division of Trauma and Acute Care Surgery, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Martin Hübner
- Department of Visceral Surgery, Lausanne University Hospital CHUV, University of Lausanne (UNIL), Rue du Bugnon 46, 1011, Lausanne, Switzerland
| | - Carolyn Johnston
- Department of Anaesthesia, St George's Hospital, Tooting, London, UK
| | - Jeniffer S Kim
- Kaiser Permanente Research, Department of Research & Evaluation, 100 South Los Robles Ave, 2nd Floor, Pasadena, CA, 91101, USA
| | - Nicholas P Lees
- Department of General & Colorectal Surgery, Salford Royal NHS Foundation Trust, Scott La, Salford, M6 8HD, UK
| | - Olle Ljungqvist
- Department of Surgery, Faculty of Medicine and Health, School of Health and Medical Sciences, Örebro University, Örebro, Sweden
| | - Dileep N Lobo
- Gastrointestinal Surgery, Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Queen's Medical Centre, Nottingham University Hospitals and University of Nottingham, Nottingham, NG7 2UH, UK
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, Queen's Medical Centre, School of Life Sciences, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Shahin Mohseni
- Division of Trauma and Emergency Surgery, Department of Surgery, School of Medical Sciences, Orebro University Hospital, Orebro University, 701 85, Orebro, Sweden
| | - Carlos A Ordoñez
- Division of Trauma and Acute Care Surgery, Department of Surgery, Fundación Valle del Lili, Cra 98 No. 18 - 49, 760032, Cali, Colombia
- Sección de Cirugía de Trauma y Emergencias, Universidad del Valle - Hospital Universitario del Valle, Cl 5 No. 36-08, 760032, Cali, Colombia
| | - Nial Quiney
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Egerton Road, Guildford, Surrey, GU5 7XX, UK
| | - Catherine Sharoky
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Richard D Urman
- Department of Anesthesiology, The Ohio State University and Wexner Medical Center, 410 West 10th Ave, Columbus, OH, 43210, USA
| | - Elizabeth Wick
- Department of Surgery, University of California San Francisco, 513 Parnassus Ave HSW1601, San Francisco, CA, 94143, USA
| | - Christopher L Wu
- Department of Anesthesiology, Critical Care and Pain Medicine, and Department of Anesthesiology, Weill-Cornell Medicine, Hospital for Special Surgery, 535 East 70th Street, New York, NY, 10021, USA
| | - Tonia Young-Fadok
- Division of Colon and Rectal Surgery, Department of Surgery, Mayo Clinic College of Medicine, Mayo Clinic Arizona, 5777 e. Mayo Blvd., Phoenix, AZ, 85054, USA
| | - Michael J Scott
- Department of Anesthesiology and Critical Care Medicine, and Leonard Davis Institute for Health Economics, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA, 19104, USA
- University College London, London, UK
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4
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Scott MJ, Aggarwal G, Aitken RJ, Anderson ID, Balfour A, Foss NB, Cooper Z, Dhesi JK, French WB, Grant MC, Hammarqvist F, Hare SP, Havens JM, Holena DN, Hübner M, Johnston C, Kim JS, Lees NP, Ljungqvist O, Lobo DN, Mohseni S, Ordoñez CA, Quiney N, Sharoky C, Urman RD, Wick E, Wu CL, Young-Fadok T, Peden CJ. Consensus Guidelines for Perioperative Care for Emergency Laparotomy Enhanced Recovery After Surgery (ERAS ®) Society Recommendations Part 2-Emergency Laparotomy: Intra- and Postoperative Care. World J Surg 2023:10.1007/s00268-023-07020-6. [PMID: 37277507 DOI: 10.1007/s00268-023-07020-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2023] [Indexed: 06/07/2023]
Abstract
BACKGROUND This is Part 2 of the first consensus guidelines for optimal care of patients undergoing emergency laparotomy (EL) using an Enhanced Recovery After Surgery (ERAS) approach. This paper addresses intra- and postoperative aspects of care. METHODS Experts in aspects of management of high-risk and emergency general surgical patients were invited to contribute by the International ERAS® Society. PubMed, Cochrane, Embase, and Medline database searches were performed for ERAS elements and relevant specific topics. Studies on each item were selected with particular attention to randomized clinical trials, systematic reviews, meta-analyses, and large cohort studies and reviewed and graded using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) system. Recommendations were made on the best level of evidence, or extrapolation from studies on elective patients when appropriate. A modified Delphi method was used to validate final recommendations. Some ERAS® components covered in other guideline papers are outlined only briefly, with the bulk of the text focusing on key areas pertaining specifically to EL. RESULTS Twenty-three components of intraoperative and postoperative care were defined. Consensus was reached after three rounds of a modified Delphi Process. CONCLUSIONS These guidelines are based on best available evidence for an ERAS® approach to patients undergoing EL. These guidelines are not exhaustive but pull together evidence on important components of care for this high-risk patient population. As much of the evidence is extrapolated from elective surgery or emergency general surgery (not specifically laparotomy), many of the components need further evaluation in future studies.
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Affiliation(s)
- Michael J Scott
- Department of Anesthesiology and Critical Care Medicine, Leonard Davis Institute for Health Economics, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA, 19104, USA.
- University College London, London, UK.
| | - Geeta Aggarwal
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Guildford, Surrey, UK
| | - Robert J Aitken
- Sir Charles Gardiner Hospital, Hospital Avenue, Nedlands, WA, 6009, Australia
| | - Iain D Anderson
- Salford Royal NHS Foundation Trust, Stott La, Salford, M6 8HD, UK
- University of Manchester, Manchester, UK
| | - Angie Balfour
- Western General Hospital, NHS Lothian, Edinburgh, EH4 2XU, Scotland
| | | | - Zara Cooper
- Harvard Medical School, Kessler Director, Center for Surgery and Public Health, Brigham and Women's Hospital and Division of Trauma, Burns, Surgical Critical Care, and Emergency Surgery, Brigham and Women's Hospital, 1620 Tremont Street, Boston, MA, 02120, USA
| | - Jugdeep K Dhesi
- School of Population Health and Environmental Sciences, Faculty of Life Sciences and Medicine, Guy's and St Thomas' NHS Foundation Trust, King's College London, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
| | - W Brenton French
- Department of Surgery, Virginia Commonwealth University Health System, 1200 E. Broad Street, Richmond, VA, 23298, USA
| | - Michael C Grant
- Department of Anesthesiology and Critical Care Medicine, Department of Surgery, The Johns Hopkins University School of Medicine, 1800 Orleans Street, Baltimore, MD, 21287, USA
| | - Folke Hammarqvist
- Department of Emergency and Trauma Surgery, Karolinska University Hospital, CLINTEC, Karolinska Institutet, Stockholm, Sweden
- Karolinska University Hospital Huddinge, Hälsovägen 3. B85, 141 86, Stockholm, Sweden
| | - Sarah P Hare
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Medway Maritime Hospital, Windmill Road, Gillingham, Kent, ME7 5NY, UK
| | - Joaquim M Havens
- Division of Trauma, Burns and Surgical Critical Care, Brigham and Women's Hospital, 75 Francis Street, Boston, MA, 02115, USA
| | - Daniel N Holena
- Division of Trauma and Acute Care Surgery, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Martin Hübner
- Department of Visceral Surgery, Lausanne University Hospital CHUV, University of Lausanne (UNIL), Rue du Bugnon 46, 1011, Lausanne, Switzerland
| | - Carolyn Johnston
- Department of Anesthesia, St George's Hospital, Tooting, London, UK
| | - Jeniffer S Kim
- Department of Research and Evaluation, Kaiser Permanente Research, Pasadena, CA, 9110, USA
| | - Nicholas P Lees
- Department of General and Colorectal Surgery, Salford Royal NHS Foundation Trust, Scott La, Salford, M6 8HD, UK
| | - Olle Ljungqvist
- Faculty of Medicine and Health, School of Health and Medical Sciences, Department of Surgery, Örebro University, Örebro, Sweden
| | - Dileep N Lobo
- Gastrointestinal Surgery, Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals and University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - Shahin Mohseni
- Division of Trauma and Emergency Surgery, Department of Surgery, Orebro University Hospital and School of Medical Sciences, Orebro University, 701 85, Orebro, Sweden
| | - Carlos A Ordoñez
- Division of Trauma and Acute Care Surgery, Department of Surgery, Fundación Valle del Lili, Cra 98 No. 18 - 49, 760032, Cali, Colombia
- Sección de Cirugía de Trauma y Emergencias, Universidad del Valle - Hospital Universitario del Valle, Cl 5 No. 36-08, 760032, Cali, Colombia
| | - Nial Quiney
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Egerton Road, Guildford, Surrey, GU5 7XX, UK
| | - Catherine Sharoky
- Division of Traumatology, Surgical Critical Care and Emergency Surgery, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Richard D Urman
- Department of Anesthesiology, The Ohio State University and Wexner Medical Center, 410 West 10Th Ave, Columbus, OH, 43210, USA
| | - Elizabeth Wick
- Department of Surgery, University of California San Francisco, 513 Parnassus Ave HSW1601, San Francisco, CA, 94143, USA
| | - Christopher L Wu
- Department of Anesthesiology, Critical Care and Pain Medicine-Hospital for Special Surgery, Department of Anesthesiology-Weill Cornell Medicine, 535 East 70th Street, New York, NY, 10021, USA
| | - Tonia Young-Fadok
- Division of Colon and Rectal Surgery, Department of Surgery, Mayo Clinic College of Medicine, Mayo Clinic Arizona, 5777 e. Mayo Blvd., Phoenix, AZ, 85054, USA
| | - Carol J Peden
- Department of Anesthesiology Keck School of Medicine, University of Southern California, 2020 Zonal Avenue IRD 322, Los Angeles, CA, 90033, USA
- Department of Anesthesiology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce St., Philadelphia, PA, 19104, USA
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5
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Moazamian A, Gharagozloo P, Aitken RJ, Drevet JR. OXIDATIVE STRESS AND REPRODUCTIVE FUNCTION: Sperm telomeres, oxidative stress, and infertility. Reproduction 2022; 164:F125-F133. [PMID: 35938805 DOI: 10.1530/rep-22-0189] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/05/2022] [Indexed: 11/08/2022]
Abstract
In brief Oxidative stress is recognized as an underlying driving factor of both telomere dysfunction and human subfertility/infertility. This review briefly reassesses telomere integrity as a fertility biomarker before proposing a novel, mechanistic rationale for the role of oxidative stress in the seemingly paradoxical lengthening of sperm telomeres with aging. Abstract The maintenance of redox balance in the male reproductive tract is critical to sperm health and function. Physiological levels of reactive oxygen species (ROS) promote sperm capacitation, while excess ROS exposure, or depleted antioxidant defenses, yields a state of oxidative stress which disrupts their fertilizing capacity and DNA structural integrity. The guanine moiety is the most readily oxidized of the four DNA bases and gets converted to the mutagenic lesion 8-hydroxy-deoxyguanosine (8-OHdG). Numerous studies have also confirmed oxidative stress as a driving factor behind accelerated telomere shortening and dysfunction. Although a clear consensus has not been reached, clinical studies also appear to associate telomere integrity with fertility outcomes in the assisted reproductive technology setting. Intriguingly, while sperm cellular and molecular characteristics make them more susceptible to oxidative insult than any other cell type, they are also the only cell type in which telomere lengthening accompanies aging. This article focuses on the oxidative stress response pathways to propose a mechanism for the explanation of this apparent paradox.
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Affiliation(s)
- Aron Moazamian
- CellOxess LLC, Ewing, New Jersey, USA.,Université Clermont Auvergne, GReD Institute, CNRS-INSERM, Clermont-Ferrand, France
| | | | - Robert J Aitken
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, New South Wales, Australia
| | - Joël R Drevet
- Université Clermont Auvergne, GReD Institute, CNRS-INSERM, Clermont-Ferrand, France
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6
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Björndahl L, Barratt CLR, Mortimer D, Agarwal A, Aitken RJ, Alvarez JG, Aneck-Hahn N, Arver S, Baldi E, Bassas L, Boitrelle F, Bornman R, Carrell DT, Castilla JA, Cerezo Parra G, Check JH, Cuasnicu PS, Darney SP, de Jager C, De Jonge CJ, Drevet JR, Drobnis EZ, Du Plessis SS, Eisenberg ML, Esteves SC, Evgeni EA, Ferlin A, Garrido N, Giwercman A, Goovaerts IGF, Haugen TB, Henkel R, Henningsohn L, Hofmann MC, Hotaling JM, Jedrzejczak P, Jouannet P, Jørgensen N, Kirkman Brown JC, Krausz C, Kurpisz M, Kvist U, Lamb DJ, Levine H, Loveland KL, McLachlan RI, Mahran A, Maree L, Martins da Silva S, Mbizvo MT, Meinhardt A, Menkveld R, Mortimer ST, Moskovtsev S, Muller CH, Munuce MJ, Muratori M, Niederberger C, O’Flaherty C, Oliva R, Ombelet W, Pacey AA, Palladino MA, Ramasamy R, Ramos L, Rives N, Roldan ER, Rothmann S, Sakkas D, Salonia A, Sánchez-Pozo MC, Sapiro R, Schlatt S, Schlegel PN, Schuppe HC, Shah R, Skakkebæk NE, Teerds K, Toskin I, Tournaye H, Turek PJ, van der Horst G, Vazquez-Levin M, Wang C, Wetzels A, Zeginiadou T, Zini A. Standards in semen examination: publishing reproducible and reliable data based on high-quality methodology. Hum Reprod 2022; 37:2497-2502. [PMID: 36112046 PMCID: PMC9627864 DOI: 10.1093/humrep/deac189] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/01/2022] [Indexed: 07/30/2023] Open
Abstract
Biomedical science is rapidly developing in terms of more transparency, openness and reproducibility of scientific publications. This is even more important for all studies that are based on results from basic semen examination. Recently two concordant documents have been published: the 6th edition of the WHO Laboratory Manual for the Examination and Processing of Human Semen, and the International Standard ISO 23162:2021. With these tools, we propose that authors should be instructed to follow these laboratory methods in order to publish studies in peer-reviewed journals, preferable by using a checklist as suggested in an Appendix to this article.
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Affiliation(s)
- Lars Björndahl
- Correspondence address. Andrology Laboratory, ANOVA, Karolinska University Hospital and Karolinska Institutet, Norra Stationsgatan 69, level 4, S-113 64 Stockholm, Sweden. E-mail:
| | | | | | - Ashok Agarwal
- Case Western Reserve University, Moreland Hills, OH, USA
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, Faculty of Science and Faculty of Health & Medicine, University of Newcastle, Callaghan, NSW, Australia
| | - Juan G Alvarez
- Centro Androgen, La Coruña, Spain
- Harvard Medical School, Boston, MA, USA
| | | | - Stefan Arver
- ANOVA, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Elisabetta Baldi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italia
| | - Lluís Bassas
- Andrology Department, Laboratory of Andrology and Sperm Bank, Fundació Puigvert, Barcelona, Spain
| | - Florence Boitrelle
- Department of Reproductive Biology, Fertility Preservation, Andrology, CECOS, Poissy Hospital, Poissy, France
- Paris Saclay University, UVSQ, INRAE, BREED, Jouy-en-Josas, France
| | - Riana Bornman
- School of Health Systems and Public Health, University of Pretoria, Pretoria, South Africa
| | - Douglas T Carrell
- Andrology and IVF Laboratory, Division of Urology, Department of Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - José A Castilla
- GAMETIA Biobank, Granada, Spain
- Hospital Universitario Virgen de las Nieves and Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain
| | - Gerardo Cerezo Parra
- LAFER Sperm Bank, Tuxpan 10-606, Roma Sur, C.P. 06760, Cuauhtémoc, Mexico City, Mexico
| | - Jerome H Check
- Robert Wood Johnson Medical School at Camden, The University of Medicine and Dentistry of New Jersey, Camden, NJ, USA
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology & Infertility, Cooper Hospital/University Medical Center, Melrose Park, PA, USA
| | - Patricia S Cuasnicu
- Instituto de Biología y Medicina Experimental (IbyME-CONICET), Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | | | | | | | - Joël R Drevet
- Université Clermont Auvergne/CNRS/INSERM-GreD Institute, Clermont-Ferrand, France
| | - Erma Z Drobnis
- School of Medicine, University of Missouri, Columbia, MI, USA
| | - Stefan S Du Plessis
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - Michael L Eisenberg
- Male Reproductive Medicine and Surgery, Stanford University School of Medicine, Stanford, CA, USA
- Department of Urology, Stanford University School of Medicine, Stanford, CA, USA
| | - Sandro C Esteves
- ANDROFERT, Andrology and Human Reproduction Clinic, Campinas, Brazil
- Department of Surgery (Division of Urology), University of Campinas (UNICAMP), Campinas, Brazil
- Faculty of Health, Aarhus University, Aarhus C, Denmark
| | - Evangelini A Evgeni
- CRYOGONIA Cryopreservation Bank, Athens, Greece
- Laboratory of Physiology, Department of Medicine, Democritus University of Thrace, Greece
| | - Alberto Ferlin
- Unit of Andrology and Reproductive Medicine, Department of Medicine, University of Padova, Padova, Italia
| | - Nicolas Garrido
- IVI Foundation, Health Research Institute La Fe, Valencia, Spain
| | | | | | - Trine B Haugen
- Department of Life Sciences and Health, Oslo Metropolitan University, Oslo, Norway
| | - Ralf Henkel
- Department of Metabolism, Digestion & Reproduction, Imperial College London, London, UK
- Department of Medical Bioscience, University of the Western Cape, Bellville, South Africa
| | - Lars Henningsohn
- Division of Urology, Department of CLINTEC, Karolinska Institutet, Stockholm, Sweden
- Department of Urology, Karolinska University Hospital, Stockholm, Sweden
| | - Marie-Claude Hofmann
- Department of Endocrine Neoplasia & Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - James M Hotaling
- Division of Urology, Department of Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Piotr Jedrzejczak
- Department of Cell Biology, Poznan University of Medical Science, Poznan, Poland
| | | | - Niels Jørgensen
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Jackson C Kirkman Brown
- Centre for Human Reproductive Science (ChRS), UK
- College of Medical & Dental Sciences, University of Birmingham, UK
- Birmingham Women’s and Children’s NHS Foundation Trust, UK
| | - Csilla Krausz
- Department of Biomedical, Experimental and Clinical Sciences “Mario Serio”, University of Florence, Florence, Italy
| | - Maciej Kurpisz
- Department of Reproductive Biology and Stem Cells, Institutet of Human Genetics, Poznan, Poland
| | - Ulrik Kvist
- ANOVA, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Dolores J Lamb
- Brady Department of Urology, Center for Reproductive Genomics and Englander Institute for Precision Medicine, Weill Cornell Medical College, Cornell University, New York, NY, USA
| | - Hagai Levine
- Braun School of Public Health and Community Medicine, Hadassah Medical Center, The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Kate L Loveland
- Hudson Institute, Centre for Reproductive Health, Monash University, Clayton, VIC, Australia
| | - Robert I McLachlan
- Hudson Institute of Medical Research, Centre for Endocrinology and Metabolism, Monash University, Clayton, VIC, Australia
| | - Ali Mahran
- Dermatology and Andrology Department, Assiut University Hospital, Assiut, Egypt
- Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Liana Maree
- Department of Medical Bioscience, University of the Western Cape, Bellville, South Africa
| | - Sarah Martins da Silva
- Reproductive Medicine Research Group, Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
| | | | - Andreas Meinhardt
- Department of Anatomy and Cell Biology, Justus-Liebig-University of Giessen, Giessen, Germany
| | - Roelof Menkveld
- Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Sharon T Mortimer
- Oozoa Biomedical Inc., West Vancouver, BC, Canada
- Division of REI, Department of Obstetrics & Gynaecology, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Sergey Moskovtsev
- Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, ON, Canada
- CreATe Fertility Centre, Toronto, ON, Canada
| | - Charles H Muller
- Male Fertility Laboratory, Department of Urology, University of Washington School of Medicine, Seattle, WA, USA
| | - Maria José Munuce
- Laboratorio de Medicina Reproductiva, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Argentina
| | - Monica Muratori
- Department of Biomedical, Experimental and Clinical Sciences “Mario Serio”, University of Florence, Florence, Italy
| | - Craig Niederberger
- Department of Urology, UIC College of Medicine, IL, USA
- Department of Bioengineering, UIC College of Engineering, IL, USA
| | - Cristian O’Flaherty
- Department of Surgery (Urology Division), McGill University, Montréal, QC, Canada
| | - Rafael Oliva
- Molecular Biology of Reproduction and Development Group, Biomedical Research Institute August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Hospital Clínic, University of Barcelona, Barcelona, Spain
| | - Willem Ombelet
- Genk Institute for Fertility Technology, Genk, Belgium
- Department of Obstetrics and Gynaecology, ZOL Hospitals and Hasselt University, Genk, Belgium
| | - Allan A Pacey
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | | | - Ranjith Ramasamy
- Department of Urology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Liliana Ramos
- Division of Reproductive Medicine, Department of Obstetrics and Gynaecologie, Radboud UMC, Nijmegen, The Netherlands
| | - Nathalie Rives
- Service Laboratoire de Biologie de la Reproduction-CECOS, Equipe Physiopathologie Surrénalienne et Gonadique, Unité Inserm 1239 NorDic, CHU-Hôpitaux de Rouen, UFR Santé—Université de Rouen, Rouen, France
| | - Eduardo Rs Roldan
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | | | | | - Andrea Salonia
- University Vita-Salute San Raffaele, Milan, Italy
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Maria Cristina Sánchez-Pozo
- Department of Clinical Chemistry and Molecular Biology, Virgen del Rocío University Hospital, Seville, Spain
| | - Rosanna Sapiro
- Depto de Histologia y Embriología, Facultad de Medicina, Gral. Flores, Uruguay
| | - Stefan Schlatt
- Centre of Reproductive Medicine and Andrology, Münster, Germany
| | - Peter N Schlegel
- Department of Urology, Weill Cornell Medicine, New York, NY, USA
| | - Hans-Christian Schuppe
- Section of Andrology, Department of Urology, Pediatric Urology & Andrology, Justus-Liebig-University/University Hospital of Giessen-Marburg, Giessen, Germany
| | - Rupin Shah
- Lilavati Hospital & Research Centre, Mumbai, India
| | - Niels E Skakkebæk
- Department of Growth and Reproduction, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Katja Teerds
- Human and Animal Physiology, Wageningen University, Wageningen, The Netherlands
| | - Igor Toskin
- WHO Department of Sexual and Reproductive Health and Research (includes the UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction—HRP), Geneva, Switzerland
| | - Herman Tournaye
- Centre for Reproductive Medicine, Vrije Universiteit Brussel, Brussels, Belgium
| | | | - Gerhard van der Horst
- Medical Bioscience, University of the Western Cape, Bellville, South Africa
- Physiology Medical School, Stellenbosch University, Stellenbosch, South Africa
- Department of Animal Science, Stellenbosch University, Stellenbosch, South Africa
| | | | - Christina Wang
- Clinical and Translational Science Institute, The Lundquist Institute, Torrance, CA, USA
- Division of Endocrinology, Department of Medicine, Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Alex Wetzels
- Fertility Laboratory, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Theodosia Zeginiadou
- Thessaloniki Andrology Laboratory—Hellenic Sperm Bank, Thessaloniki, Greece
- Laboratory of Histology-Embryology, Medical School, University of Athens, Athens, Greece
| | - Armand Zini
- Division of Urology, Department of Surgery, St Mary's Hospital, McGill University, Montreal, Canada
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7
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Williams CL, Fareed R, Mortimer GLM, Aitken RJ, Wilson IV, George G, Gillespie KM, Williams AJK, Long AE. The longitudinal loss of islet autoantibody responses from diagnosis of type 1 diabetes occurs progressively over follow-up and is determined by low autoantibody titres, early-onset, and genetic variants. Clin Exp Immunol 2022; 210:151-162. [PMID: 36181724 PMCID: PMC9750828 DOI: 10.1093/cei/uxac087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/03/2022] [Accepted: 09/30/2022] [Indexed: 01/12/2023] Open
Abstract
The clinical usefulness of post-diagnosis islet autoantibody levels is unclear and factors that drive autoantibody persistence are poorly defined in type 1 diabetes (T1D). Our aim was to characterise the longitudinal loss of islet autoantibody responses after diagnosis in a large, prospectively sampled UK cohort. Participants with T1D [n = 577] providing a diagnosis sample [range -1.0 to 2.0 years] and at least one post-diagnosis sample (<32.0 years) were tested for autoantibodies to glutamate decarboxylase 65 (GADA), islet antigen-2 (IA-2A), and zinc transporter 8 (ZnT8A). Select HLA and non-HLA SNPs were considered. Non-genetic and genetic factors were assessed by multivariable logistic regression models for autoantibody positivity at initial sampling and autoantibody loss at final sampling. For GADA, IA-2A, and ZnT8A, 70.8%, 76.8%, and 40.1%, respectively, remained positive at the final sampling. Non-genetic predictors of autoantibody loss were low baseline autoantibody titres (P < 0.0001), longer diabetes duration (P < 0.0001), and age-at-onset under 8 years (P < 0.01--0.05). Adjusting for non-genetic covariates, GADA loss was associated with low-risk HLA class II genotypes (P = 0.005), and SNPs associated with autoimmunity RELA/11q13 (P = 0.017), LPP/3q28 (P = 0.004), and negatively with IFIH1/2q24 (P = 0.018). IA-2A loss was not associated with genetic factors independent of other covariates, while ZnT8A loss was associated with the presence of HLA A*24 (P = 0.019) and weakly negatively with RELA/11q13 (P = 0.049). The largest longitudinal study of islet autoantibody responses from diagnosis of T1D shows that autoantibody loss is heterogeneous and influenced by low titres at onset, longer duration, earlier age-at-onset, and genetic variants. These data may inform clinical trials where post-diagnosis participants are recruited.
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Affiliation(s)
- C L Williams
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - R Fareed
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - G L M Mortimer
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - R J Aitken
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - I V Wilson
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - G George
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - K M Gillespie
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - A J K Williams
- Diabetes and Metabolism, Translational Health Sciences, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK
| | - The BOX Study Group
BallavChitrabhanuDrBucks Healthcare Trust, UKDuttaAtanuDrBucks Healthcare Trust, UKRussell-TaylorMichelleDrBucks Healthcare Trust, UKBesserRachelDrOxford University Hospitals Trust UK, UKBursellJamesDrMilton Keynes University Hospital, UKChandranShanthiDrMilton Keynes University Hospital, UKPatelSejalDrWexham Park Hospital, UKSmithAnneDrNorthampton General Hospital, UKKenchaiahManoharaDrNorthampton General Hospital, UKMargabanthuGomathiDrKettering General Hospital, UKKavvouraFoteiniDrRoyal Berkshire Hospital, UKYaliwalChandanDrRoyal Berkshire Hospital, UK
| | - A E Long
- Correspondence: Dr Anna. E. Long. Diabetes and Metabolism, Bristol Medical School, University of Bristol, Level 2, Learning and Research Building, Southmead Hospital, Bristol BS10 5NB, UK.
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8
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Aitken RJ, Watters DAK. Clearing elective surgery waiting lists after the
COVID
‐19 pandemic cannot be allowed to compromise emergency surgery care. Med J Aust 2022; 217:237-238. [PMID: 35918077 PMCID: PMC9538332 DOI: 10.5694/mja2.51672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/18/2022]
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9
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Drevet JR, Hallak J, Nasr-Esfahani MH, Aitken RJ. Reactive Oxygen Species and Their Consequences on the Structure and Function of Mammalian Spermatozoa. Antioxid Redox Signal 2022; 37:481-500. [PMID: 34913729 DOI: 10.1089/ars.2021.0235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Significance: Among the 200 or so cell types that comprise mammals, spermatozoa have an ambiguous relationship with the reactive oxygen species (ROS) inherent in the consumption of oxygen that supports aerobic metabolism. Recent Advances: In this review, we shall see that spermatozoa need the action of ROS to reach their structural and functional maturity, but that due to intrinsic unique characteristics, they are, perhaps more than any other cell type, susceptible to oxidative damage. Recent studies have improved our knowledge of how oxidative damage affects sperm structures and functions. The focus of this review will be on how genetic and epigenetic oxidative alterations to spermatozoa can have dramatic unintended consequences in terms of both the support and the suppression of sperm function. Critical Issues: Oxidative stress can have dramatic consequences not only for the spermatozoon itself, but also, and above all, on its primary objective, which is to carry out fertilization and to ensure, in part, that the embryonic development program should lead to a healthy progeny. Future Directions: Sperm oxidative DNA damage largely affects the integrity of the paternal genetic material to such an extent that the oocyte may have difficulties in correcting it. Diagnostic and therapeutic actions should be considered more systematically, especially in men with difficulties to conceive. Research is underway to determine whether the epigenetic information carried by spermatozoa is also subject to changes mediated by pro-oxidative situations. Antioxid. Redox Signal. 37, 481-500.
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Affiliation(s)
- Joël R Drevet
- Faculty of Medicine, GReD Institute, INSERM U1103-CNRS UMR6293-Université Clermont Auvergne, Clermont-Ferrand, France
| | - Jorge Hallak
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Research Andrology Laboratory, São Paulo, Brazil.,Division of Urology, University of São Paulo, São Paulo, Brazil.,Men's Health Study Group, Institute for Advanced Studies, University of São Paulo, São Paulo, Brazil.,Reproductive Toxicology Unit, Department of Pathology, University of São Paulo, São Paulo, Brazil
| | - Mohammad-Hossein Nasr-Esfahani
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.,Isfahan Fertility and Infertility Center, Isfahan, Iran
| | - Robert J Aitken
- Faculty of Science and Priority Research Center for Reproductive Sciences, The University of Newcastle, Callaghan, Australia.,Faculty of Health and Medicine, Priority Research Center for Reproductive Sciences, The University of Newcastle, Callaghan, Australia.,Hunter Medical Research Institute, New Lambton Heights, Australia
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10
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Seaton A, Cherrie JW, Cowie H, Aitken RJ. Science With Purpose: 50 Years of the Institute of Occupational Medicine. Front Public Health 2022; 10:924678. [PMID: 35812511 PMCID: PMC9260281 DOI: 10.3389/fpubh.2022.924678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 05/16/2022] [Indexed: 12/04/2022] Open
Abstract
The Institute of Occupational Medicine (IOM) was founded in 1969 by the then UK National Coal Board to complete its nation-wide epidemiological study of lung disease in coal miners, the Pneumoconiosis Field Research. The results quantified risks in the industry and were influential across the world in setting preventive standards. The research, based on epidemiology, was multidisciplinary from the start, and the IOM's broad scientific expertise was applied across many other industries with an increasing focus on environmental measurement and ergonomics. In 1990, as the coal industry declined, IOM became a self-funding research charity with a strong commercial arm. It has expanded its research, often with European collaborators and funding from governments, and has achieved wide recognition. This has most recently been applied during the pandemic in areas of hospital ventilation, personal protection, and viral exposure research, illustrating IOM's ability to respond to new environmental or occupational challenges.
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Affiliation(s)
- Anthony Seaton
- Institute of Occupational Medicine, Edinburgh, United Kingdom
- University of Aberdeen, King's College London, London, United Kingdom
| | - John W. Cherrie
- Institute of Occupational Medicine, Edinburgh, United Kingdom
| | - Hilary Cowie
- Institute of Occupational Medicine, Edinburgh, United Kingdom
- *Correspondence: Hilary Cowie
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11
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Medica AJ, Aitken RJ, Nicolson GL, Sheridan AR, Swegen A, De Iuliis GN, Gibb Z. Glycerophospholipids protect stallion spermatozoa from oxidative damage in vitro. Reprod Fertil 2022; 2:199-209. [PMID: 35118390 PMCID: PMC8801026 DOI: 10.1530/raf-21-0028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 07/21/2021] [Indexed: 12/30/2022] Open
Abstract
Stallion sperm membranes comprise a high proportion of polyunsaturated fatty acids, making stallion spermatozoa especially vulnerable to peroxidative damage from reactive oxygen species generated as a by-product of cell metabolism. Membrane lipid replacement therapy with glycerophospholipid (GPL) mixtures has been shown to reduce oxidative damage in vitro and in vivo. The aims of this study were to test the effects of a commercial preparation of GPL, NTFactor® Lipids, on stallion spermatozoa under oxidative stress. When oxidative damage was induced by the addition of arachidonic acid to stallion spermatozoa, the subsequent addition of GPL reduced the percentage of 4-hydroxynonenal (4-HNE; a key end product of lipid peroxidation) positive cells (32.9 ± 2.7 vs 20.9 ± 2.3%; P ≤ 0.05) and increased the concentration of 4-HNE within the spent media (0.026 ± 0.003 vs 0.039 ± 0.004 µg/mL; P ≤ 0.001), suggesting that oxidized lipids had been replaced by exogenous GPL. Lipid replacement improved several motility parameters (total motility: 2.0 ± 1.0 vs 68.8 ± 2.9%; progressive motility: 0 ± 0 vs 19.3 ± 2.6%; straight line velocity: 9.5 ± 2.1 vs 50.9 ± 4.1 µm/s; curvilinear velocity: 40.8 ± 10 vs 160.7 ± 7.8 µm/s; average path velocity: 13.4 ± 2.9 vs 81.9 ± 5.9 µm/s; P ≤ 0.001), sperm viability (13.5 ± 2.9 vs 80.2 ± 1.6%; P ≤ 0.001) and reduced mitochondrial ROS generation (98.2 ± 0.6 vs 74.8 ± 6.1%; P ≤ 0.001). Supplementation with GPL during 17°C in vitro sperm storage over 72 h improved sperm viability (66.4 ± 2.6 vs 78.1 ± 2.9%; P ≤ 0.01) and total motility (53 ± 5.6 vs 66.3 ± 3.5%; P ≤ 0.05). It is concluded that incubation of stallion spermatozoa with sub-µm-sized GPL micelles results in the incorporation of exogenous GPL into sperm membranes, diminishing lipid peroxidation and improving sperm quality in vitro.
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Affiliation(s)
- Ashlee J Medica
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Garth L Nicolson
- Institute for Molecular Medicine, Huntington Beach, California, USA
| | - Alecia R Sheridan
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Aleona Swegen
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Geoffry N De Iuliis
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - Zamira Gibb
- Priority Research Centre for Reproductive Science, College of Engineering, Science and Environmental, and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
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12
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Fraser B, Peters AE, Sutherland JM, Liang M, Rebourcet D, Nixon B, Aitken RJ. Biocompatible Nanomaterials as an Emerging Technology in Reproductive Health; a Focus on the Male. Front Physiol 2021; 12:753686. [PMID: 34858208 PMCID: PMC8632065 DOI: 10.3389/fphys.2021.753686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 10/06/2021] [Indexed: 12/24/2022] Open
Abstract
A growing body of research has confirmed that nanoparticle (NP) systems can enhance delivery of therapeutic and imaging agents as well as prevent potentially damaging systemic exposure to these agents by modifying the kinetics of their release. With a wide choice of NP materials possessing different properties and surface modification options with unique targeting agents, bespoke nanosystems have been developed for applications varying from cancer therapeutics and genetic modification to cell imaging. Although there remain many challenges for the clinical application of nanoparticles, including toxicity within the reproductive system, some of these may be overcome with the recent development of biodegradable nanoparticles that offer increased biocompatibility. In recognition of this potential, this review seeks to present recent NP research with a focus on the exciting possibilities posed by the application of biocompatible nanomaterials within the fields of male reproductive medicine, health, and research.
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Affiliation(s)
- Barbara Fraser
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Alexandra E Peters
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,Priority Research Centre for Reproductive Science, School of Biomedical Science and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
| | - Jessie M Sutherland
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,Priority Research Centre for Reproductive Science, School of Biomedical Science and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
| | - Mingtao Liang
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,Priority Research Centre for Reproductive Science, School of Biomedical Science and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
| | - Diane Rebourcet
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
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13
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Sadeghi N, Tavalaee M, Kiani-Esfahani A, Moazamian A, Gharagozloo P, Aitken RJ, Drevet JR, Nasr-Esfahani MH. Apoptotic M540 bodies present in human semen interfere with flow cytometry-assisted assessment of sperm DNA fragmentation and oxidation. Basic Clin Androl 2021; 31:23. [PMID: 34670490 PMCID: PMC8529777 DOI: 10.1186/s12610-021-00143-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/11/2021] [Indexed: 11/29/2022] Open
Abstract
Background The use of flow cytometry (FC) to evaluate sperm DNA fragmentation via deoxynucleotidyl transferase terminal fluorescein dUTP nick-end labeling (TUNEL) has shown inconsistencies compared with conventional fluorescent microscopic analyses. It has been hypothesized that the observed discrepancies could be attributed to the presence of apoptotic bodies that can be labeled with merocyanine 540, the so-called M540 bodies. In order to verify this hypothesis and determine the accuracy of our in-house FC-assisted evaluation of spermatozoa parameters, we used FC to evaluate both the fragmentation of sperm DNA using the TUNEL assay and the oxidation of sperm DNA using the 8-OHdG assay on semen samples with or without M540 bodies. Results We show that the presence of M540 bodies lead to underestimation of both the level of sperm DNA fragmentation and sperm DNA oxidation when using FC assisted detection systems. We also observed that this situation is particularly pertinent in semen samples classified as abnormal with respect to the routine WHO semen evaluation as they appear to contain more M540 bodies than normal samples. Conclusions We conclude that M540 bodies interfere with both FC-conducted assays designed to evaluate sperm nuclear/DNA integrity. Exclusion of these contaminants in unprepared semen samples should be performed in order to correctly appreciate the true level of sperm DNA/nuclear damage which is known to be a critical male factor for reproductive success. Supplementary Information The online version contains supplementary material available at 10.1186/s12610-021-00143-7.
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Affiliation(s)
- Niloofar Sadeghi
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Marziyeh Tavalaee
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Abbas Kiani-Esfahani
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Aron Moazamian
- CelloXess LLC, 830 Bear Tavern Road, Ewing, NJ, 08628, USA.,Priority Research Centre for Reproductive Sciences, Faculty of Science and Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | | | - Robert J Aitken
- Priority Research Centre for Reproductive Sciences, Faculty of Science and Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, 2308, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, 2305, Australia
| | - Joël R Drevet
- GReD Institute, CRBC, Faculté de Médecine, INSERM U1103-CNRS UMR6293-Université Clermont Auvergne, 28 Place Henri-Dunant, 63000, Clermont-Ferrand, France.
| | - Mohammad Hossein Nasr-Esfahani
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran. .,Isfahan Fertility and Infertility Center, Isfahan, Iran.
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14
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Fraser BA, Miller K, Trigg NA, Smith ND, Western PS, Nixon B, Aitken RJ. A novel approach to nonsurgical sterilization; application of menadione-modified gonocyte-targeting M13 bacteriophage for germ cell ablation in utero. Pharmacol Res Perspect 2021; 8:e00654. [PMID: 32930516 PMCID: PMC7507010 DOI: 10.1002/prp2.654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 12/13/2022] Open
Abstract
There remains a compelling need for the development of nonsurgical sterilizing agents to expand the fertility management options for both domestic and feral animal species. We hypothesize that an efficacious sterilization approach would be to selectively ablate nonrenewable cell types that are essential for reproduction, such as the undifferentiated gonocytes within the embryonic gonad. Here, we report a novel strategy to achieve this goal centered on the use of a chemically modified M13 bacteriophage to effect the targeted delivery of menadione, a redox‐cycling naphthoquinone, to mouse gonocytes. Panning of the M13 random peptide ‘phage display library proved effective in the isolation of gonocyte‐specific targeting clones. One such clone was modified via N‐succinimidyl‐S‐acetylthioacetate (SATA) linkage to the N‐terminus of the major PVIII capsid protein. Subsequent deacetylation of the SATA was undertaken to expose a thiol group capable of reacting with menadione through Michael addition. This chemical modification was confirmed using UV spectrophotometry. In proof‐of‐concept experiments we applied the modified ‘phage to primary cultures of fetal germ cells and induced, an approximately, 60% reduction in the viability of the target cell population. These studies pave the way for in vivo application of chemically modified M13 bacteriophage in order to achieve the selective ablation of nonrenewable cell types in the reproductive system, thereby providing a novel nonsurgical approach the regulation of fertility in target species.
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Affiliation(s)
- Barbara A Fraser
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Kasey Miller
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Natalie A Trigg
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Nathan D Smith
- Analytical and Biomolecular Research Facility, The University of Newcastle, Callaghan, NSW, Australia
| | - Patrick S Western
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
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15
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Peden CJ, Aggarwal G, Aitken RJ, Anderson ID, Bang Foss N, Cooper Z, Dhesi JK, French WB, Grant MC, Hammarqvist F, Hare SP, Havens JM, Holena DN, Hübner M, Kim JS, Lees NP, Ljungqvist O, Lobo DN, Mohseni S, Ordoñez CA, Quiney N, Urman RD, Wick E, Wu CL, Young-Fadok T, Scott M. Guidelines for Perioperative Care for Emergency Laparotomy Enhanced Recovery After Surgery (ERAS) Society Recommendations: Part 1-Preoperative: Diagnosis, Rapid Assessment and Optimization. World J Surg 2021; 45:1272-1290. [PMID: 33677649 PMCID: PMC8026421 DOI: 10.1007/s00268-021-05994-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Enhanced Recovery After Surgery (ERAS) protocols reduce length of stay, complications and costs for a large number of elective surgical procedures. A similar, structured approach appears to improve outcomes, including mortality, for patients undergoing high-risk emergency general surgery, and specifically emergency laparotomy. These are the first consensus guidelines for optimal care of these patients using an ERAS approach. METHODS Experts in aspects of management of the high-risk and emergency general surgical patient were invited to contribute by the International ERAS® Society. Pubmed, Cochrane, Embase, and MEDLINE database searches on English language publications were performed for ERAS elements and relevant specific topics. Studies on each item were selected with particular attention to randomized controlled trials, systematic reviews, meta-analyses and large cohort studies, and reviewed and graded using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) system. Recommendations were made on the best level of evidence, or extrapolation from studies on non-emergency patients when appropriate. The Delphi method was used to validate final recommendations. The guideline has been divided into two parts: Part 1-Preoperative Care and Part 2-Intraoperative and Postoperative management. This paper provides guidelines for Part 1. RESULTS Twelve components of preoperative care were considered. Consensus was reached after three rounds. CONCLUSIONS These guidelines are based on the best available evidence for an ERAS approach to patients undergoing emergency laparotomy. Initial management is particularly important for patients with sepsis and physiological derangement. These guidelines should be used to improve outcomes for these high-risk patients.
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Affiliation(s)
- Carol J. Peden
- Department of Anesthesiology and Gehr Family Center for Health Systems Science & Innovation, Keck School of Medicine, University of Southern California, 2020 Zonal Avenue IRD 322, Los Angeles, CA 90033 USA
- Department of Anesthesiology, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104 USA
| | - Geeta Aggarwal
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Guildford, Surrey, UK
| | - Robert J. Aitken
- Sir Charles Gardiner Hospital, Hospital Avenue, Nedlands, WA 6009 Australia
| | - Iain D. Anderson
- Salford Royal NHS Foundation Trust, Stott La, Salford, M6 8HD UK
- University of Manchester, Manchester, UK
| | | | - Zara Cooper
- Harvard Medical School, Kessler Director, Center for Surgery and Public Health, Brigham and Women’s Hospital and Division of Trauma, Burns, Surgical Critical Care, and Emergency Surgery, Brigham and Women’s Hospital, 1620, Tremont Street, Boston, MA 02120 USA
| | - Jugdeep K. Dhesi
- Faculty of Life Sciences and Medicine, School of Population Health & Environmental Sciences, Guy’s and St Thomas’ NHS Foundation Trust, King’s College London, Division of Surgery & Interventional Science, University College London, London, UK
| | - W. Brenton French
- Department of Surgery, Virginia Commonwealth University Health System, 1200 E. Broad Street, Richmond, VA 23298 USA
| | - Michael C. Grant
- Department of Anesthesiology and Critical Care Medicine, Department of Surgery, The Johns Hopkins University School of Medicine, 1800 Orleans Street, Baltimore, MD 21287 USA
| | - Folke Hammarqvist
- Department of Emergency and Trauma Surgery, Karolinska University Hospital, CLINTEC, Karolinska Institutet, Stockholm, Sweden
- Karolinska University Hospital, Huddinge Hälsovägen 3. B85, S 141 86, Stockholm, Sweden
| | - Sarah P. Hare
- Department of Anaesthesia, Perioperative Medicine and Critical Care, Medway Maritime Hospital, Windmill Road, Gillingham, Kent, ME7 5NY UK
| | - Joaquim M. Havens
- Division of Trauma, Burns and Surgical Critical Care, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA 02115 USA
| | - Daniel N. Holena
- Department of Surgery and Critical Care Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Martin Hübner
- Department of Visceral Surgery, Lausanne University Hospital CHUV, University of Lausanne (UNIL), Rue du Bugnon 46, 1011 Lausanne, Switzerland
| | - Jeniffer S. Kim
- Gehr Family Center for Health Systems Science & Innovation, Keck School of Medicine, University of Southern California, 2020 Zonal Avenue IRD 322, Los Angeles, CA 90033 USA
| | - Nicholas P. Lees
- Department of General & Colorectal Surgery, Salford Royal NHS Foundation Trust, Scott La, Salford, M6 8HD UK
| | - Olle Ljungqvist
- Department of Surgery, Faculty of Medicine and Health, School of Health and Medical Sciences, Örebro University, Örebro, Sweden
| | - Dileep N. Lobo
- Gastrointestinal Surgery, Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals and University of Nottingham, Queen’s Medical Centre, Nottingham, NG7 2UH UK
- MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Queen’s Medical Centre, Nottingham, NG7 2UH UK
| | - Shahin Mohseni
- Division of Trauma and Emergency Surgery, Department of Surgery, Orebro University Hospital & School of Medical Sciences, Örebro University, 701 85 Örebro, Sweden
| | - Carlos A. Ordoñez
- Division of Trauma and Acute Care Surgery, Department of Surgery, Fundación Valle del Lili, Cra 98 No. 18 – 49, 760032 Cali, Colombia
- Sección de Cirugía de Trauma Y Emergencias, Universidad del Valle – Hospital Universitario del Valle, Cl 5 No. 36-08, 760032 Cali, Colombia
| | - Nial Quiney
- Department of Anesthesia and Intensive Care Medicine, Royal Surrey County Hospital, Egerton Road, Guildford, Surrey, GU5 7XX UK
| | - Richard D. Urman
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital / Harvard Medical School, 75 Francis Street, Boston, MA 02115 USA
| | - Elizabeth Wick
- Department of Surgery, University of California San Francisco, 513 Parnassus Ave HSW1601, San Francisco, CA 94143 USA
| | - Christopher L. Wu
- Department of Anesthesiology, Critical Care and Pain Medicine-Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021 USA
- Department of Anesthesiology, Weill Cornell Medicine, 535 East 70th Street, New York, NY 10021 USA
| | - Tonia Young-Fadok
- Division of Colon and Rectal Surgery, Department of Surgery, Mayo Clinic College of Medicine, Mayo Clinic Arizona, 5777 E. Mayo Blvd, Phoenix, AZ 85054 USA
| | - Michael Scott
- Department of Anesthesiology and Critical Care Medicine, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104 USA
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16
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Ciccone IM, Costa EM, Pariz JR, Teixeira TA, Drevet JR, Gharagozloo P, Aitken RJ, Hallak J. Serum vitamin D content is associated with semen parameters and serum testosterone levels in men. Asian J Androl 2021; 23:52-58. [PMID: 32341213 PMCID: PMC7831823 DOI: 10.4103/aja.aja_9_20] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 11/20/2019] [Indexed: 02/07/2023] Open
Abstract
The present study aimed to evaluate the influence of serum vitamin D levels on semen quality and testosterone levels. This is a cross-sectional study conducted at Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory in Sao Paulo, Brazil, with 508 male patients, aged 18-60 years, from 2007 to 2017. Seminal parameters and serum sexual hormones were correlated with serum vitamin D concentrations in 260 men selected by strict selection criteria. Patients were divided into normozoospermic group (NZG, n = 124) and a group with seminal abnormalities (SAG, n = 136). Evaluation included complete physical examination, past medical history, habits and lifestyle factors, two complete seminal analysis with sperm functional tests, serum levels of 25-hydroxy-vitamin D3(25(OH)VD3), total and free testosterone, luteinizing hormone (LH), follicle-stimulating hormone (FSH), sex hormone-binding globulin (SHBG), total cholesterol, homeostatic model assessment of insulin resistance (HOMA-IR) index, and karyotype. The mean concentration of 25(OH)VD3was significantly lower in the SAG (P < 0.001) and positively correlated with all baseline seminal parameters and total testosterone levels. In addition, serum vitamin D3concentration was found to be positively correlated with sperm concentration (β= 2.103; P < 0.001), total number of spermatozoa with progressive motility (β = 2.069; P = 0.003), total number of motile spermatozoa (β = 2.571; P = 0.015), and strict morphology (β = 0.056; P = 0.006), regardless of other variables. This is the first comparative study to address the issue of serum vitamin D3content between normozoospermic patients and those with sperm abnormalities. It clearly demonstrates a direct and positive relationship between serum vitamin D level and overall semen quality, male reproductive potential, and testosterone levels.
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Affiliation(s)
- Inari M Ciccone
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory, Sao Paulo 04534-011, Brazil
- Division of Urology, University of Sao Paulo, Sao Paulo 05403-000, Brazil
- Men's Health Study Group, Institute for Advanced Studies, University of Sao Paulo, Sao Paulo 05508-060, Brazil
| | - Elaine Mf Costa
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory, Sao Paulo 04534-011, Brazil
- Men's Health Study Group, Institute for Advanced Studies, University of Sao Paulo, Sao Paulo 05508-060, Brazil
- Division of Endocrinology, University of Sao Paulo, Sao Paulo 05403-000, Brazil
| | - Juliana R Pariz
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory, Sao Paulo 04534-011, Brazil
- Men's Health Study Group, Institute for Advanced Studies, University of Sao Paulo, Sao Paulo 05508-060, Brazil
| | - Thiago A Teixeira
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory, Sao Paulo 04534-011, Brazil
- Division of Urology, University of Sao Paulo, Sao Paulo 05403-000, Brazil
- Men's Health Study Group, Institute for Advanced Studies, University of Sao Paulo, Sao Paulo 05508-060, Brazil
- School of Medicine, Urology Department, Federal University of Amapa, Macapa 68903-419, Brazil
| | - Joel R Drevet
- Faculty of Medicine, GReD Laboratory, Université Clermont Auvergne, 49, Bd François-Mitterrand - CS 60032, 63001 Clermont-Ferrand Cedex, France
| | | | - Robert J Aitken
- CellOxess LLC, Ewing, NJ 08628, USA
- School of Environmental and Life Sciences, Priority Research Centre for Reproductive Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - Jorge Hallak
- Androscience, Science and Innovation Center in Andrology and High-Complex Clinical and Andrology Laboratory, Sao Paulo 04534-011, Brazil
- Division of Urology, University of Sao Paulo, Sao Paulo 05403-000, Brazil
- Men's Health Study Group, Institute for Advanced Studies, University of Sao Paulo, Sao Paulo 05508-060, Brazil
- Reproductive Toxicology Unit, Department of Pathology, University of Sao Paulo, Sao Paulo 05403-000, Brazil
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17
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Affiliation(s)
- John W Cherrie
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, UK.,Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, Riccarton, Edinburgh, UK
| | - Miranda Loh
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, UK
| | - Robert J Aitken
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, UK
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18
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Loh M, Cherrie JW, Aitken RJ. Decontamination of respirators in the covid-19 pandemic. BMJ 2020; 369:m1986. [PMID: 32423975 DOI: 10.1136/bmj.m1986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Miranda Loh
- Institute of Occupational Medicine (IOM), Edinburgh EH9 1AX, UK
| | - John W Cherrie
- Institute of Occupational Medicine (IOM), Edinburgh EH9 1AX, UK
| | - Robert J Aitken
- Institute of Occupational Medicine (IOM), Edinburgh EH9 1AX, UK
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19
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Setyawati MI, Singh D, Krishnan SPR, Huang X, Wang M, Jia S, Goh BHR, Ho CG, Yusoff R, Kathawala MH, Poh TY, Ali NABM, Chotirmall SH, Aitken RJ, Riediker M, Christiani DC, Fang M, Bello D, Demokritou P, Ng KW. Occupational Inhalation Exposures to Nanoparticles at Six Singapore Printing Centers. Environ Sci Technol 2020; 54:2389-2400. [PMID: 31967798 DOI: 10.1021/acs.est.9b06984] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Laser printers emit high levels of nanoparticles (PM0.1) during operation. Although it is well established that toners contain multiple engineered nanomaterials (ENMs), little is known about inhalation exposures to these nanoparticles and work practices in printing centers. In this report, we present a comprehensive inhalation exposure assessment of indoor microenvironments at six commercial printing centers in Singapore, the first such assessment outside of the United States, using real-time personal and stationary monitors, time-integrated instrumentation, and multiple analytical methods. Extensive presence of ENMs, including titanium dioxide, iron oxide, and silica, was detected in toners and in airborne particles collected from all six centers studied. We document high transient exposures to emitted nanoparticles (peaks of ∼500 000 particles/cm3, lung-deposited surface area of up to 220 μm2/cm3, and PM0.1 up to 16 μg/m3) with complex PM0.1 chemistry that included 40-60 wt % organic carbon, 10-15 wt % elemental carbon, and 14 wt % trace elements. We also record 271.6-474.9 pmol/mg of Environmental Protection Agency-priority polycyclic aromatic hydrocarbons. These findings highlight the potentially high occupational inhalation exposures to nanoparticles with complex compositions resulting from widespread usage of nano-enabled toners in the printing industry, as well as inadequate ENM-specific exposure control measures in these settings.
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Affiliation(s)
- Magdiel I Setyawati
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Dilpreet Singh
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health , Harvard University , 665 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Sriram P R Krishnan
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
- IOM Singapore , 237 Alexandra Road , 159929 , Singapore
| | - Xian Huang
- IOM Singapore , 237 Alexandra Road , 159929 , Singapore
| | - Mengjing Wang
- School of Civil and Environmental Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Shenglan Jia
- School of Civil and Environmental Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Bernice Huan Rong Goh
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Chin Guan Ho
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Ridhwan Yusoff
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Mustafa H Kathawala
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Tuang Yeow Poh
- Lee Kong Chian School of Medicine , Nanyang Technological University , 11 Mandalay Road , 308232 , Singapore
| | | | - Sanjay H Chotirmall
- Lee Kong Chian School of Medicine , Nanyang Technological University , 11 Mandalay Road , 308232 , Singapore
| | | | - Michael Riediker
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
- IOM Singapore , 237 Alexandra Road , 159929 , Singapore
| | - David C Christiani
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health , Harvard University , 665 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Mingliang Fang
- School of Civil and Environmental Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
| | - Dhimiter Bello
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health , Harvard University , 665 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Philip Demokritou
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health , Harvard University , 665 Huntington Avenue , Boston , Massachusetts 02115 , United States
| | - Kee Woei Ng
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , 639798 , Singapore
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health , Harvard University , 665 Huntington Avenue , Boston , Massachusetts 02115 , United States
- Skin Research Institute of Singapore , Biomedical Science Institutes , Immunos, 8A Biomedical Grove , 138648 , Singapore
- Environmental Chemistry & Materials Centre, Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University , 1 Cleantech Loop, CleanTech One , 637141 , Singapore
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20
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Aitken RJ, Drevet JR. The Importance of Oxidative Stress in Determining the Functionality of Mammalian Spermatozoa: A Two-Edged Sword. Antioxidants (Basel) 2020; 9:antiox9020111. [PMID: 32012712 PMCID: PMC7070991 DOI: 10.3390/antiox9020111] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 12/31/2022] Open
Abstract
This article addresses the importance of oxidative processes in both the generation of functional gametes and the aetiology of defective sperm function. Functionally, sperm capacitation is recognized as a redox-regulated process, wherein a low level of reactive oxygen species (ROS) generation is intimately involved in driving such events as the stimulation of tyrosine phosphorylation, the facilitation of cholesterol efflux and the promotion of cAMP generation. However, the continuous generation of ROS ultimately creates problems for spermatozoa because their unique physical architecture and unusual biochemical composition means that they are vulnerable to oxidative stress. As a consequence, they are heavily dependent on the antioxidant protection afforded by the fluids in the male and female reproductive tracts and, during the precarious process of insemination, seminal plasma. If this antioxidant protection should be compromised for any reason, then the spermatozoa experience pathological oxidative damage. In addition, situations may prevail that cause the spermatozoa to become exposed to high levels of ROS emanating either from other cells in the immediate vicinity (particularly neutrophils) or from the spermatozoa themselves. The environmental and lifestyle factors that promote ROS generation by the spermatozoa are reviewed in this article, as are the techniques that might be used in a diagnostic context to identify patients whose reproductive capacity is under oxidative threat. Understanding the strengths and weaknesses of ROS-monitoring methodologies is critical if we are to effectively identify those patients for whom treatment with antioxidants might be considered a rational management strategy.
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Affiliation(s)
- Robert J. Aitken
- Priority Research Centre for Reproductive Sciences, Faculty of Science and Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW 2308, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW, 2305, Australia
- Correspondence:
| | - Joel R. Drevet
- GReD Institute, INSERM U1103—CNRS UMR6293—Université Clermont Auvergne, Faculty of Medicine, CRBC building, 28 place Henri Dunant, 63001 Clermont-Ferrand, France;
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21
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Aitken RJ, Maddern GJ. Learning from death. ANZ J Surg 2019; 89:1355-1356. [PMID: 31760697 DOI: 10.1111/ans.15452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 08/21/2019] [Accepted: 08/23/2019] [Indexed: 11/27/2022]
Affiliation(s)
- Robert J Aitken
- Department of General Surgery, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia.,Australian and New Zealand Audit of Surgical Mortality, Royal Australasian College of Surgeons, Melbourne, Victoria, Australia
| | - Guy J Maddern
- Australian and New Zealand Audit of Surgical Mortality, Royal Australasian College of Surgeons, Melbourne, Victoria, Australia.,Discipline of Surgery, The University of Adelaide, Adelaide, South Australia, Australia
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22
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Xavier MJ, Nixon B, Roman SD, Scott RJ, Drevet JR, Aitken RJ. Paternal impacts on development: identification of genomic regions vulnerable to oxidative DNA damage in human spermatozoa. Hum Reprod 2019; 34:1876-1890. [DOI: 10.1093/humrep/dez153] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/03/2019] [Indexed: 12/13/2022] Open
Abstract
Abstract
STUDY QUESTION
Do all regions of the paternal genome within the gamete display equivalent vulnerability to oxidative DNA damage?
SUMMARY ANSWER
Oxidative DNA damage is not randomly distributed in mature human spermatozoa but is instead targeted, with particular chromosomes being especially vulnerable to oxidative stress.
WHAT IS KNOWN ALREADY
Oxidative DNA damage is frequently encountered in the spermatozoa of male infertility patients. Such lesions can influence the incidence of de novo mutations in children, yet it remains to be established whether all regions of the sperm genome display equivalent susceptibility to attack by reactive oxygen species.
STUDY DESIGN, SIZE, DURATION
Human spermatozoa obtained from normozoospermic males (n = 8) were split into equivalent samples and subjected to either hydrogen peroxide (H2O2) treatment or vehicle controls before extraction of oxidized DNA using a modified DNA immunoprecipitation (MoDIP) protocol. Specific regions of the genome susceptible to oxidative damage were identified by next-generation sequencing and validated in the spermatozoa of normozoospermic males (n = 18) and in patients undergoing infertility evaluation (n = 14).
PARTICIPANTS/MATERIALS, SETTING, METHODS
Human spermatozoa were obtained from normozoospermic males and divided into two identical samples prior to being incubated with either H2O2 (5 mm, 1 h) to elicit oxidative stress or an equal volume of vehicle (untreated controls). Alternatively, spermatozoa were obtained from fertility patients assessed as having high basal levels of oxidative stress within their spermatozoa. All semen samples were subjected to MoDIP to selectively isolate oxidized DNA, prior to sequencing of the resultant DNA fragments using a next-generation whole-genomic sequencing platform. Bioinformatic analysis was then employed to identify genomic regions vulnerable to oxidative damage, several of which were selected for real-time quantitative PCR (qPCR) validation.
MAIN RESULTS AND THE ROLE OF CHANCE
Approximately 9000 genomic regions, 150–1000 bp in size, were identified as highly vulnerable to oxidative damage in human spermatozoa. Specific chromosomes showed differential susceptibility to damage, with chromosome 15 being particularly sensitive to oxidative attack while the sex chromosomes were protected. Susceptible regions generally lay outside protamine- and histone-packaged domains. Furthermore, we confirmed that these susceptible genomic sites experienced a dramatic (2–15-fold) increase in their burden of oxidative DNA damage in patients undergoing infertility evaluation compared to normal healthy donors.
LIMITATIONS, REASONS FOR CAUTION
The limited number of samples analysed in this study warrants external validation, as do the implications of our findings. Selection of male fertility patients was based on high basal levels of oxidative stress within their spermatozoa as opposed to specific sub-classes of male factor infertility.
WIDER IMPLICATIONS OF THE FINDINGS
The identification of genomic regions susceptible to oxidation in the male germ line will be of value in focusing future analyses into the mutational load carried by children in response to paternal factors such as age, the treatment of male infertility using ART and paternal exposure to environmental toxicants.
STUDY FUNDING/COMPETING INTEREST(S)
Project support was provided by the University of Newcastle’s (UoN) Priority Research Centre for Reproductive Science. M.J.X. was a recipient of a UoN International Postgraduate Research Scholarship. B.N. is the recipient of a National Health and Medical Research Council of Australia Senior Research Fellowship. Authors declare no conflict of interest.
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Affiliation(s)
- M J Xavier
- Priority Research Centre for Reproductive Science, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - B Nixon
- Priority Research Centre for Reproductive Science, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - S D Roman
- Priority Research Centre for Reproductive Science, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
- Priority Research Centre for Drug Development, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
| | - R J Scott
- Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
- Medical Genetics, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
- Division of Molecular Medicine, Pathology North, John Hunter Hospital, New Lambton Heights, NSW, Australia
| | - J R Drevet
- GReD Laboratory, CNRS UMR6293—INSERM U1103—Clermont Université, Clermont-Ferrand, France
| | - R J Aitken
- Priority Research Centre for Reproductive Science, Faculty of Science, The University of Newcastle, Callaghan, NSW, Australia
- Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
- Medical Genetics, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
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Vorilhon S, Brugnon F, Kocer A, Dollet S, Bourgne C, Berger M, Janny L, Pereira B, Aitken RJ, Moazamian A, Gharagozloo P, Drevet J, Pons-Rejraji H. Accuracy of human sperm DNA oxidation quantification and threshold determination using an 8-OHdG immuno-detection assay. Hum Reprod 2019; 33:553-562. [PMID: 29579272 DOI: 10.1093/humrep/dey038] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 02/03/2018] [Indexed: 01/18/2023] Open
Abstract
STUDY QUESTION Can a discriminant threshold be determined for human sperm DNA oxidation? SUMMARY ANSWER A discriminant threshold was found with 65.8% of 8-hydroxy-2'-deoxyguanosine (8-OHdG)-positive sperm cells and a mean intensity of fluorescence (MIF) of 552 arbitrary units. WHAT IS KNOWN ALREADY Oxidative stress is known to interfere with sperm quality and fertilizing capacity. However, current practice does not include the routine determination of oxidative DNA damage in spermatozoa; optimized consensus protocols are lacking and no thresholds of normality have been established. STUDY DESIGN, SIZE, DURATION Intra- and inter-method comparisons between four protocols (I-IV) were conducted to determine the most relevant and efficient means of assessing human sperm 8-OHdG content. Tests of assay repeatability, specificity, sensitivity and stability were performed to validate an optimized methodology for routine diagnostic use. PARTICIPANTS/MATERIALS, SETTING, METHODS This prospective study compared three immuno-detection methods including immunocytochemistry, fluorescence microscopy and flow cytometry. Sperm DNA oxidation for 80 patients was determined relative to semen parameters and clinical conditions, using the selected immuno-detection protocol in comparison with a commercial kit. These patients (age 35 ± 1 years: mean ± SEM) presented with normozoospermic (n = 40) or altered parameters (necro- or/and astheno- or/and teratozoospermia or/and leukocytospermia). MAIN RESULTS AND THE ROLE OF CHANCE Significant positive Pearson and Spearman correlations were determined for 8-OHdG values and sperm parameters using protocol III. A notable high and positive correlation was revealed for MIF with BMI and leukocyte concentration. Protocol III was the most discriminating method regarding assay repeatability, specificity, sensitivity, stability and reliability for sperm parameter alterations, in particular leukocytospermia according to parametric or non-parametric tests, effect-size determinations and factorial analysis such as principal component analysis and factor discriminant analysis. Of interest is that 39% of the subjects with 'pathological' sperm DNA oxidation values were normozoospermic. LIMITATIONS, REASONS FOR CAUTION The oligozoospermic population was not evaluated in this study because insufficient material was available to carry out the comparisons. However, spermatozoa concentration was taken into account in the statistical analysis. WIDER IMPLICATIONS OF THE FINDINGS Our study is the first validation of a protocol to determine a discriminant threshold for human sperm DNA oxidation. The protocol's detection accuracy for 8-OHdG human sperm DNA residues, stability over time, and relationship to human sperm quality were demonstrated. The assay should find application in the diagnosis of male factor infertility associated with oxidative stress. STUDY FUNDING/COMPETING INTEREST(S) This work was funded by institutional grants from the CNRS, INSERM and Université Clermont Auvergne (to J.R.D.) and by Clermont-Ferrand Hospital-CECOS research funds (to L.J. and F.B.). P.G., A.M., R.J.A. and J.D. are, respectively, CEO, scientific director and scientific advisors of a US-based biotech company (Celloxess, Princeton, NJ, USA) involved in preventative medicine with a focus on the generation of antioxidant oral supplements.
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Affiliation(s)
- S Vorilhon
- CHU Clermont Ferrand, CHU Estaing, Laboratoire de Biologie du Développement et de la Reproduction, AMP, CECOS, F-63003 Clermont-Ferrand, France.,Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France
| | - F Brugnon
- CHU Clermont Ferrand, CHU Estaing, Laboratoire de Biologie du Développement et de la Reproduction, AMP, CECOS, F-63003 Clermont-Ferrand, France.,Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France.,Université Clermont Auvergne, UFR Médecine, INSERM 1240, IMoST., F-63000 Clermont-Ferrand, France
| | - A Kocer
- Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France
| | - S Dollet
- Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France.,Université Clermont Auvergne, UFR Médecine, INSERM 1240, IMoST., F-63000 Clermont-Ferrand, France
| | - C Bourgne
- CHU Clermont Ferrand, Hôpital Estaing, Laboratoire d'Hématologie Biologique, F-63003 Clermont-Ferrand, France
| | - M Berger
- CHU Clermont Ferrand, Hôpital Estaing, Laboratoire d'Hématologie Biologique, F-63003 Clermont-Ferrand, France
| | - L Janny
- CHU Clermont Ferrand, CHU Estaing, Laboratoire de Biologie du Développement et de la Reproduction, AMP, CECOS, F-63003 Clermont-Ferrand, France.,Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France
| | - B Pereira
- CHU Clermont-Ferrand, DRCI, 'Délégation Recherche Clinique et Innovation', Clermont-Ferrand, France
| | - R J Aitken
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - A Moazamian
- CellOxess LLC, 830 Bear Tavern Road, Ewing, NJ 08628, USA
| | - P Gharagozloo
- CellOxess LLC, 830 Bear Tavern Road, Ewing, NJ 08628, USA
| | - J Drevet
- Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France
| | - H Pons-Rejraji
- CHU Clermont Ferrand, CHU Estaing, Laboratoire de Biologie du Développement et de la Reproduction, AMP, CECOS, F-63003 Clermont-Ferrand, France.,Université Clermont Auvergne, CNRS UMR6293, INSERM U1103, GReD, F-63000 Clermont-Ferrand, France.,Université Clermont Auvergne, UFR Médecine, INSERM 1240, IMoST., F-63000 Clermont-Ferrand, France
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24
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Broughton KJ, Aitken RJ. Australia urgently needs a quality improvement approach to emergency laparotomy. Med J Aust 2019; 208:58-59. [PMID: 29385966 DOI: 10.5694/mja17.00793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 09/22/2017] [Indexed: 11/17/2022]
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25
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Swegen A, Smith ND, Gibb Z, Curry BJ, Aitken RJ. The serine protease testisin is present on the surface of capacitated stallion spermatozoa and interacts with key zona pellucida binding proteins. Andrology 2018; 7:199-212. [PMID: 30549223 DOI: 10.1111/andr.12569] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/28/2018] [Accepted: 11/03/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND OBJECTIVES Serine proteases are emerging as important players in the spermatozoon's acquisition of functional competence. This study aimed to characterize the serine protease testisin (PRSS21) in stallion spermatozoa, examining its surface expression, possible origins in the testis and epididymis, and changes in response to capacitation and acrosome reaction, as well as its capacity to form high molecular weight complexes and interact with other proteins. MATERIALS AND METHODS The role of serine proteases in spontaneous capacitation and acrosome reaction of stallion spermatozoa was established using the serine protease inhibitor, AEBSF. Testisin localization, before and after exposure of stallion spermatozoa to capacitating conditions and calcium ionophore, was examined using live cell immunofluorescence and flow cytometry. Immunohistochemistry of testicular and epididymal tissues was used to further dissect the origins of sperm testisin. Testisin's participation in high molecular weight protein complexes and identification of its interacting partner proteins were investigated using Blue Native PAGE, co-immunoprecipitation, and mass spectrometry, with interrogation of protein-protein interaction databases and gene ontology analysis of partner proteins used to further explore the potential roles of the testisin-containing complex in sperm function. RESULTS Testisin surface expression increased significantly in capacitated spermatozoa (p < 0.001), increased further following acrosome reaction (p < 0.01), and was localized to the equatorial region of the sperm head. Testisin was also detected in luminal fluid within the caput and corpus regions of the epididymis, epididymal spermatozoa, and epididymal epithelial cells. Testisin formed several multiprotein complexes; co-immunoprecipitation revealed interactions of testisin with a multitude of zona pellucida-binding proteins, including ZPBP, ZAN, acrosin, several heat-shock proteins, and components of the TCP1 complex. CONCLUSION Testisin appears to form part of the zona pellucida-binding complex in stallion spermatozoa and may be involved in the proteolytic cascade that prepares the sperm surface for interaction with the oocyte.
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Affiliation(s)
- A Swegen
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia
| | - N D Smith
- Analytical and Biomolecular Research Facility, University of Newcastle, Callaghan, NSW, Australia
| | - Z Gibb
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia
| | - B J Curry
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia
| | - R J Aitken
- Priority Research Centre for Reproductive Science, University of Newcastle, Callaghan, NSW, Australia
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26
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Ortega-Ferrusola C, Martin Muñoz P, Ortiz-Rodriguez JM, Anel-López L, Balao da Silva C, Álvarez M, de Paz P, Tapia JA, Anel L, Silva- Rodríguez A, Aitken RJ, Gil MC, Gibb Z, Peña FJ. Depletion of thiols leads to redox deregulation, production of 4-hydroxinonenal and sperm senescence: a possible role for GSH regulation in spermatozoa†. Biol Reprod 2018; 100:1090-1107. [DOI: 10.1093/biolre/ioy241] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/06/2018] [Accepted: 11/07/2018] [Indexed: 12/20/2022] Open
Affiliation(s)
| | - Patricia Martin Muñoz
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Jose Manuel Ortiz-Rodriguez
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Luis Anel-López
- Reproduction and Obstetrics Department of Animal Medicine and Surgery, University of León, Spain
| | | | - Mercedes Álvarez
- Reproduction and Obstetrics Department of Animal Medicine and Surgery, University of León, Spain
| | - Paulino de Paz
- Reproduction and Obstetrics Department of Animal Medicine and Surgery, University of León, Spain
| | - Jose Antonio Tapia
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Luis Anel
- Reproduction and Obstetrics Department of Animal Medicine and Surgery, University of León, Spain
| | - Antonio Silva- Rodríguez
- Facility of Innovation and Analysis in Animal Source Foodstuffs, University of Extremadura, Cáceres, Spain
| | - Robert J Aitken
- Facility of Innovation and Analysis in Animal Source Foodstuffs, University of Extremadura, Cáceres, Spain
| | - M Cruz Gil
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - Zamira Gibb
- Priority Research Center in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Fernando J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
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27
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Kozhakhmetova A, Wyatt RC, Caygill C, Williams C, Long AE, Chandler K, Aitken RJ, Wenzlau JM, Davidson HW, Gillespie KM, Williams AJK. A quarter of patients with type 1 diabetes have co-existing non-islet autoimmunity: the findings of a UK population-based family study. Clin Exp Immunol 2018; 192:251-258. [PMID: 29431870 DOI: 10.1111/cei.13115] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2018] [Indexed: 12/28/2022] Open
Abstract
Individuals with type 1 diabetes (T1D) are at increased risk of coeliac disease (CD), autoimmune thyroiditis and autoimmune gastritis, but the absolute risks are unclear. The aim of this study was to investigate the prevalence of autoantibodies to tissue transglutaminase (TGA), thyroid peroxidase (TPOA) and gastric H+ /K+ -ATPase (ATPA) and their genetic associations in a well-characterized population-based cohort of individuals with T1D from the Bart's-Oxford family study for whom islet autoantibody prevalence data were already available. Autoantibodies in sera from 1072 patients (males/females 604/468; median age 11·8 years, median T1D duration 2·7 months) were measured by radioimmunoassays; HLA class II risk genotype was analysed in 973 (91%) using polymerase chain reaction with sequence specific primers (PCR-SSP). The prevalence of TGA (and/or history of CD), TPOA and ATPA in patients was 9·0, 9·6 and 8·2%, respectively; 3·1% had two or more autoantibodies. Females were at higher risk of multiple autoimmunity; TGA/CD were associated with younger age and TPOA with older age. ATPA were uncommon in patients under 5 years, and more common in older patients. Anti-glutamate decarboxylase autoantibodies were predictive of co-existing TPOA/ATPA. TGA/CD were associated with human leucocyte antigen (HLA) DR3-DQ2, with the DR3-DQ2/DR3-DQ2 genotype conferring the highest risk, followed by DR4-DQ8/DR4-DQ8. ATPA were associated with DR3-DQ2, DRB1*0404 (in males) and the DR3-DQ2/DR4-DQ8 genotype. TPOA were associated with the DR3-DQ2/DR3-DQ2 genotype. Almost one-quarter of patients diagnosed with T1D aged under 21 years have at least one other organ-specific autoantibody. HLA class II genetic profiling may be useful in identifying those at risk of multiple autoimmunity.
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Affiliation(s)
- A Kozhakhmetova
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - R C Wyatt
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - C Caygill
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - C Williams
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - A E Long
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - K Chandler
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - R J Aitken
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - J M Wenzlau
- The Barbara Davis Center for Diabetes, University of Colorado, Denver, CO, USA
| | - H W Davidson
- The Barbara Davis Center for Diabetes, University of Colorado, Denver, CO, USA
| | - K M Gillespie
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
| | - A J K Williams
- Diabetes and Metabolism, Translational Health Sciences, University of Bristol, Bristol, UK
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28
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Abstract
BACKGROUND The risk of unexplained fetal death or stillbirth increases late in pregnancy, suggesting that placental aging is an etiological factor. Aging is associated with oxidative damage to DNA, RNA, and lipids. We hypothesized that placentas at >41 completed weeks of gestation (late-term) would show changes consistent with aging that would also be present in placentas associated with stillbirths. OBJECTIVE We sought to determine whether placentas from late-term pregnancies and unexplained stillbirth show oxidative damage and other biochemical signs of aging. We also aimed to develop an in vitro term placental explant culture model to test the aging pathways. STUDY DESIGN We collected placentas from women at 37-39 weeks' gestation (early-term and term), late-term, and with unexplained stillbirth. We used immunohistochemistry to compare the 3 groups for: DNA/RNA oxidation (8-hydroxy-deoxyguanosine), lysosomal distribution (lysosome-associated membrane protein 2), lipid oxidation (4-hydroxynonenal), and autophagosome size (microtubule-associated proteins 1A/1B light chain 3B, LC3B). The expression of aldehyde oxidase 1 was measured by real-time polymerase chain reaction. Using a placental explant culture model, we tested the hypothesis that aldehyde oxidase 1 mediates oxidative damage to lipids in the placenta. RESULTS Placentas from late-term pregnancies show increased aldehyde oxidase 1 expression, oxidation of DNA/RNA and lipid, perinuclear location of lysosomes, and larger autophagosomes compared to placentas from women delivered at 37-39 weeks. Stillbirth-associated placentas showed similar changes in oxidation of DNA/RNA and lipid, lysosomal location, and autophagosome size to placentas from late-term. Placental explants from term deliveries cultured in serum-free medium also showed evidence of oxidation of lipid, perinuclear lysosomes, and larger autophagosomes, changes that were blocked by the G-protein-coupled estrogen receptor 1 agonist G1, while the oxidation of lipid was blocked by the aldehyde oxidase 1 inhibitor raloxifene. CONCLUSION Our data are consistent with a role for aldehyde oxidase 1 and G-protein-coupled estrogen receptor 1 in mediating aging of the placenta that may contribute to stillbirth. The placenta is a tractable model of aging in human tissue.
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Affiliation(s)
- Kaushik Maiti
- Mothers and Babies Research Center, Hunter Medical Research Institute, Newcastle, Australia; Priority Research Center in Reproductive Science, Faculty of Health, University of Newcastle, Newcastle, Australia
| | - Zakia Sultana
- Mothers and Babies Research Center, Hunter Medical Research Institute, Newcastle, Australia; Priority Research Center in Reproductive Science, Faculty of Health, University of Newcastle, Newcastle, Australia
| | - Robert J Aitken
- Priority Research Center in Reproductive Science, Faculty of Health, University of Newcastle, Newcastle, Australia
| | - Jonathan Morris
- Kolling Institute, Royal North Shore Hospital, University of Sydney, Sydney, Australia
| | - Felicity Park
- Department of Obstetrics and Gynecology, John Hunter Hospital, Newcastle, Australia
| | - Bronwyn Andrew
- Department of Obstetrics and Gynecology, John Hunter Hospital, Newcastle, Australia
| | - Simon C Riley
- MRC Center for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Roger Smith
- Mothers and Babies Research Center, Hunter Medical Research Institute, Newcastle, Australia; Priority Research Center in Reproductive Science, Faculty of Health, University of Newcastle, Newcastle, Australia.
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29
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Aitken RJ. Reactive oxygen species as mediators of sperm capacitation and pathological damage. Mol Reprod Dev 2017; 84:1039-1052. [PMID: 28749007 DOI: 10.1002/mrd.22871] [Citation(s) in RCA: 328] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/23/2017] [Indexed: 12/12/2022]
Abstract
Oxidative stress plays a major role in the life and death of mammalian spermatozoa. These gametes are professional generators of reactive oxygen species (ROS), which appear to derive from three potential sources: sperm mitochondria, cytosolic L-amino acid oxidases, and plasma membrane Nicotinamide adenine dinucleotide phosphate oxidases. The oxidative stress created via these sources appears to play a significant role in driving the physiological changes associated with sperm capacitation through the stimulation of a cyclic adenosine monophosphate/Protein kinase A phosphorylation cascade, including the activation of Extracellular signal regulated kinase-like proteins, massive up-regulation of tyrosine phosphorylation in the sperm tail, as well as the induction of sterol oxidation. When generated in excess, however, ROS can induce lipid peroxidation that, in turn, disrupts membrane characteristics that are critical for the maintenance of sperm function, including the capacity to fertilize an egg. Furthermore, the lipid aldehydes generated as a consequence of lipid peroxidation bind to proteins in the mitochondrial electron transport chain, triggering yet more ROS generation in a self-perpetuating cycle. The high levels of oxidative stress created as a result of this process ultimately damage the DNA in the sperm nucleus; indeed, DNA damage in the male germ line appears to be predominantly induced oxidatively, reflecting the vulnerability of these cells to such stress. Extensive evaluation of antioxidants that protect the spermatozoa against oxidative stress while permitting the normal reduction-oxidation regulation of sperm capacitation is therefore currently being undertaken, and has already proven efficacious in animal models.
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Affiliation(s)
- Robert J Aitken
- Discipline of Biological Sciences Priority Research Centre in Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia
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30
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Affiliation(s)
- Andrew D Maynard
- Risk Innovation Lab at Arizona State University, PO Box 875603, ASU, Tempe, Arizona 85387-5603, USA
| | - Robert J Aitken
- SAFENANO at the Institute of Occupational Medicine (IOM), Riccarton, Edinburgh, EH14 4AP, UK
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31
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Houston BJ, Nixon B, King BV, De Iuliis GN, Aitken RJ. The effects of radiofrequency electromagnetic radiation on sperm function. Reproduction 2016; 152:R263-R276. [PMID: 27601711 DOI: 10.1530/rep-16-0126] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 09/02/2016] [Indexed: 11/08/2022]
Abstract
Mobile phone usage has become an integral part of our lives. However, the effects of the radiofrequency electromagnetic radiation (RF-EMR) emitted by these devices on biological systems and specifically the reproductive systems are currently under active debate. A fundamental hindrance to the current debate is that there is no clear mechanism of how such non-ionising radiation influences biological systems. Therefore, we explored the documented impacts of RF-EMR on the male reproductive system and considered any common observations that could provide insights on a potential mechanism. Among a total of 27 studies investigating the effects of RF-EMR on the male reproductive system, negative consequences of exposure were reported in 21. Within these 21 studies, 11 of the 15 that investigated sperm motility reported significant declines, 7 of 7 that measured the production of reactive oxygen species (ROS) documented elevated levels and 4 of 5 studies that probed for DNA damage highlighted increased damage due to RF-EMR exposure. Associated with this, RF-EMR treatment reduced the antioxidant levels in 6 of 6 studies that discussed this phenomenon, whereas consequences of RF-EMR were successfully ameliorated with the supplementation of antioxidants in all 3 studies that carried out these experiments. In light of this, we envisage a two-step mechanism whereby RF-EMR is able to induce mitochondrial dysfunction leading to elevated ROS production. A continued focus on research, which aims to shed light on the biological effects of RF-EMR will allow us to test and assess this proposed mechanism in a variety of cell types.
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Affiliation(s)
- B J Houston
- Priority Research Centre for Reproductive ScienceSchool of Environmental and Life Sciences
| | - B Nixon
- Priority Research Centre for Reproductive ScienceSchool of Environmental and Life Sciences
| | - B V King
- School of Mathematical and Physical SciencesUniversity of Newcastle, Callaghan, New South Wales, Australia
| | - G N De Iuliis
- Priority Research Centre for Reproductive ScienceSchool of Environmental and Life Sciences
| | - R J Aitken
- Priority Research Centre for Reproductive ScienceSchool of Environmental and Life Sciences
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32
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Aitken RJ. Oxidative stress and the etiology of male infertility. J Assist Reprod Genet 2016; 33:1691-1692. [PMID: 27544275 DOI: 10.1007/s10815-016-0791-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 08/08/2016] [Indexed: 10/21/2022] Open
Affiliation(s)
- R J Aitken
- Discipline of Biological Sciences and Priority Research Centre for Reproductive Science, Faculty of Science and IT, University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia. .,Hunter Medical Research Institute, New Lambton Heights, NSW, 2305, Australia.
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34
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Gibb Z, Lambourne SR, Curry BJ, Hall SE, Aitken RJ. Aldehyde Dehydrogenase Plays a Pivotal Role in the Maintenance of Stallion Sperm Motility. Biol Reprod 2016; 94:133. [PMID: 27103446 DOI: 10.1095/biolreprod.116.140509] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 04/12/2016] [Indexed: 01/30/2023] Open
Abstract
Although stallion spermatozoa produce significant quantities of reactive oxygen species, a lag between 4-hydroxynonenal (4HNE) adduction and the loss of motility in stallion spermatozoa suggests the presence of a robust aldehyde detoxification mechanism. Because there is a paucity of studies characterizing the role of aldehyde dehydrogenase (ALDH) in sperm functionality, the aim of this study was to ascertain the relationship between 4HNE production and motility and ALDH expression by stallion spermatozoa. PCR analysis revealed the presence of the ALDH1A3, ALDH1B1, and ALDH2 isoforms in these cells. Strong correlations (P < 0.001) were found between ALDH expression and various motility parameters of stallion spermatozoa including the percentage of progressive (r = 0.79) and rapidly motile (r = 0.79) spermatozoa, whereas repeated measurements over 24 h revealed highly significant correlations among progressive motility loss, 4HNE accumulation, and ALDH expression (P ≤ 0.001). ALDH inhibition resulted in a spontaneous increase in 4HNE levels in viable cells (21.1 ± 5.8% vs. 42.6 ± 5.2%; P ≤ 0.05) and a corresponding decrease in total motility (41.7 ± 6.2% vs. 6.4 ± 2.6%; P ≤ 0.001) and progressive motility (17.0 ± 4.1% vs. 0.7 ± 0.4%; P ≤ 0.001) of stallion spermatozoa over 24 h. Similarly, inhibition of ALDH in 4HNE-challenged spermatozoa significantly reduced total motility over 4 h (35.4 ± 9.7% vs. 15.3 ± 5.1%, respectively; P ≤ 0.05). This study contributes valuable information about the role of the ALDH enzymes in the maintenance of stallion sperm functionality, with potential diagnostic and in vitro applications for assisted reproductive technologies.
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Affiliation(s)
- Zamira Gibb
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Sarah R Lambourne
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Benjamin J Curry
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Sally E Hall
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
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Abstract
This chapter explores the possibility that capacitation and apoptosis are linked processes joined by their common dependence on the continued generation of reactive oxygen species (ROS). According to this model capacitation is initiated in spematozoa following their release into the female reproductive tract as a consequence of intracellular ROS generation, which stimulates intracellular cAMP generation, inhibits tyrosine phosphatase activity and enhances the formation of oxysterols prior to their removal from the sperm surface by albumin. The continued generation of ROS by capacitating populations of spermatozoa eventually overwhelms the limited capacity of these cells to protect themselves from oxidative stress. As a result the over-capacitation of spermatozoa leads to a state of senescence and the activation of a truncated intrinsic apoptotic cascade characterized by enhanced mitochondrial ROS generation, lipid peroxidation, motility loss, caspase activation and phosphatidylserine externalization. The latter may be particularly important in instructing phagocytic leukocytes that the removal of senescent, moribund spermatozoa should be a silent process unaccompanied by the generation of proinflammatory cytokines. These observations reveal the central role played by redox chemistry in defining the life and death of spermatozoa. A knowledge of these mechanisms may help us to engineer novel solutions to both support and preserve the functionality of these highly specialized cells.
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Affiliation(s)
- Robert J Aitken
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences and Hunter Medical Research Institute, University of Newcastle, NSW 2308, Australia
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Leahy T, Rickard JP, Aitken RJ, de Graaf SP. D-penicillamine prevents ram sperm agglutination by reducing the disulphide bonds of a copper-binding sperm protein. Reproduction 2016; 151:491-500. [PMID: 26860122 DOI: 10.1530/rep-15-0596] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/08/2016] [Indexed: 11/08/2022]
Abstract
Head-to-head agglutination of ram spermatozoa is induced by dilution in the Tyrode's capacitation medium with albumin, lactate and pyruvate (TALP) and ameliorated by the addition of the thiol d-penicillamine (PEN). To better understand the association and disassociation of ram spermatozoa, we investigated the mechanism of action of PEN in perturbing sperm agglutination. PEN acts as a chelator of heavy metals, an antioxidant and a reducing agent. Chelation is not the main mechanism of action, as the broad-spectrum chelator ethylenediaminetetraacetic acid and the copper-specific chelator bathocuproinedisulfonic acid were inferior anti-agglutination agents compared with PEN. Oxidative stress is also an unlikely mechanism of sperm association, as PEN was significantly more effective in ameliorating agglutination than the antioxidants superoxide dismutase, ascorbic acid, α-tocopherol and catalase. Only the reducing agents cysteine and DL-dithiothreitol displayed similar levels of non-agglutinated spermatozoa at 0 h compared with PEN but were less effective after 3 h of incubation (37 °C). The addition of 10 µM Cu(2+) to 250 µM PEN + TALP caused a rapid reversion of the motile sperm population from a non-agglutinated state to an agglutinated state. Other heavy metals (cobalt, iron, manganese and zinc) did not provoke such a strong response. Together, these results indicate that PEN prevents sperm association by the reduction of disulphide bonds on a sperm membrane protein that binds copper. ADAM proteins are possible candidates, as targeted inhibition of the metalloproteinase domain significantly increased the percentage of motile, non-agglutinated spermatozoa (52.0% ± 7.8) compared with TALP alone (10.6% ± 6.1).
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Affiliation(s)
- T Leahy
- Faculty of Veterinary ScienceThe University of Sydney, Camperdown, New South Wales, Australia
| | - J P Rickard
- Faculty of Veterinary ScienceThe University of Sydney, Camperdown, New South Wales, Australia
| | - R J Aitken
- Discipline of Biological SciencesFaculty of Science and IT and Faculty of Health and Medicine, University of Newcastle, Callaghan, New South Wales, Australia
| | - S P de Graaf
- Faculty of Veterinary ScienceThe University of Sydney, Camperdown, New South Wales, Australia
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Leahy T, Rickard JP, Aitken RJ, de Graaf SP. Penicillamine prevents ram sperm agglutination in media that support capacitation. Reproduction 2016; 151:167-77. [DOI: 10.1530/rep-15-0413] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ram spermatozoa are difficult to capacitate in vitro. Here we describe a further complication, the unreported phenomenon of head-to-head agglutination of ram spermatozoa following dilution in the capacitation medium Tyrodes plus albumin, lactate and pyruvate (TALP). Sperm agglutination is immediate, specific and persistent and is not associated with a loss of motility. Agglutination impedes in vitro sperm handling and analysis. So the objectives of this study were to investigate the cause of sperm agglutination and potential agents which may reduce agglutination. The percentage of non-agglutinated, motile spermatozoa increased when bicarbonate was omitted from complete TALP suggesting that bicarbonate ions stimulate the agglutination process. d-penicillamine (PEN), a nucleophilic thiol, was highly effective at reducing agglutination. The inclusion of 250 μM PEN in TALP reduced the incidence of motile, agglutinated spermatozoa from 76.7±2.7% to 2.8±1.4%. It was then assessed if PEN (1 mM) could be included in existing ram sperm capacitation protocols (TALP +1 mM dibutyryl cAMP, caffeine and theophylline) to produce spermatozoa that were simultaneously capacitated and non-agglutinated. This protocol resulted in a sperm population which displayed high levels of tyrosine phosphorylated proteins and lipid disordered membranes (merocyanine-540) while remaining motile, viable, acrosome-intact and non-agglutinated. In summary, PEN (1 mM) can be included in ram sperm capacitation protocols to reduce sperm agglutination and allow for the in vitro assessment of ram sperm capacitation.
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Gharagozloo P, Gutiérrez-Adán A, Champroux A, Noblanc A, Kocer A, Calle A, Pérez-Cerezales S, Pericuesta E, Polhemus A, Moazamian A, Drevet JR, Aitken RJ. A novel antioxidant formulation designed to treat male infertility associated with oxidative stress: promising preclinical evidence from animal models. Hum Reprod 2016; 31:252-62. [PMID: 26732620 DOI: 10.1093/humrep/dev302] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Accepted: 11/09/2015] [Indexed: 01/04/2023] Open
Abstract
STUDY QUESTION Does a novel antioxidant formulation designed to restore redox balance within the male reproductive tract, reduce sperm DNA damage and increase pregnancy rates in mouse models of sperm oxidative stress? SUMMARY ANSWER Oral administration of a novel antioxidant formulation significantly reduced sperm DNA damage in glutathione peroxidase 5 (GPX5), knockout mice and restored pregnancy rates to near-normal levels in mice subjected to scrotal heat stress. WHAT IS KNOWN ALREADY Animal and human studies have documented the adverse effect of sperm DNA damage on fertilization rates, embryo quality, miscarriage rates and the transfer of de novo mutations to offspring. Semen samples of infertile men are known to be deficient in several key antioxidants relative to their fertile counterparts. Antioxidants alone or in combination have demonstrated limited efficacy against sperm oxidative stress and DNA damage in numerous human clinical trials, however these studies have not been definitive and an optimum combination has remained elusive. STUDY DESIGN, SIZE, DURATION The efficacy of the antioxidant formulation was evaluated in two well-established mouse models of oxidative stress, scrotal heating and Gpx5 knockout (KO) mice, (n = 12 per experimental group), by two independent laboratories. Mice were provided the antioxidant product in their drinking water for 2-8 weeks and compared with control groups for sperm DNA damage and pregnancy rates. PARTICIPANTS/MATERIALS, SETTING, METHODS In the Gpx5 KO model, oxidative DNA damage was monitored in spermatozoa by immunocytochemical detection of 8-hydroxy-2'-deoxyguanosine (8OHdG). In the scrotal heat stress model, male fertility was tested by partnering with three females for 5 days. The percentage of pregnant females, number of vaginal plugs, resorptions per litter, and litter size were recorded. MAIN RESULTS AND ROLE OF CHANCE Using immunocytochemical detection of 8OHdG as a biomarker of DNA oxidation, analysis of control mice revealed that around 30% of the sperm population was positively stained. This level increased to about 60% in transgenic mice deficient in the antioxidant enzyme, GPX5. Our results indicate that an 8 week pretreatment of Gpx5 KO mice with the antioxidant formulation provided complete protection of sperm DNA against oxidative damage. In mouse models of scrotal heat stress, only 35% (19/54) of female mice became pregnant resulting in 169 fetuses with 18% fetal resorption (30/169). This is in contrast to the antioxidant pretreated group where 74% (42/57) of female mice became pregnant, resulting in 427 fetuses with 9% fetal resorption (38/427). In both animal models the protection provided by the novel antioxidant was statistically significant (P < 0.01 for the reduction of 8OHdG in the spermatozoa of Gpx5 KO mice and P < 0.05 for increase in fertility in the scrotal heat stress model). LIMITATIONS, REASONS FOR CAUTION It was not possible to determine the exact level of antioxidant consumption for each mouse during the treatment period. WIDER IMPLICATIONS OF THE FINDINGS Recent clinical studies confirm moderate to severe sperm DNA damage in about 60% of all men visiting IVF centers and in about 80% of men diagnosed with idiopathic male infertility. Our results, if confirmed in humans, will impact clinical fertility practice because they support the concept of using an efficacious antioxidant supplementation as a preconception therapy, in order to optimize fertilization rates, help to maintain a healthy pregnancy and limit the mutational load carried by children. STUDY FUNDING/COMPETING INTERESTS The study was funded by the Clermont Université and the University of Madrid. P.G. is the Managing Director of CellOxess LLC, which has a commercial interest in the detection and resolution of oxidative stress. A.M. and A.P. are employees of CellOxess, LLC. J.R.D., A.G.-A. and R.J.A. are honorary members of the CellOxess advisory board.
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Affiliation(s)
- P Gharagozloo
- CellOxess LLC, 15 Roszel Road, Princeton, NJ 08540, USA
| | | | - A Champroux
- GReD Lab CNRS UMR6293-INSERM U1103 Université Blaise Pascal-Clermont II, Clermont-Ferrand 63001, France
| | - A Noblanc
- GReD Lab CNRS UMR6293-INSERM U1103 Université Blaise Pascal-Clermont II, Clermont-Ferrand 63001, France
| | - A Kocer
- GReD Lab CNRS UMR6293-INSERM U1103 Université Blaise Pascal-Clermont II, Clermont-Ferrand 63001, France
| | - A Calle
- INIA, Animal Reproduction, Madrid 28040, Spain
| | | | | | - A Polhemus
- CellOxess LLC, 15 Roszel Road, Princeton, NJ 08540, USA
| | - A Moazamian
- CellOxess LLC, 15 Roszel Road, Princeton, NJ 08540, USA
| | - J R Drevet
- GReD Lab CNRS UMR6293-INSERM U1103 Université Blaise Pascal-Clermont II, Clermont-Ferrand 63001, France
| | - R J Aitken
- Hunter Medical Research Institute, New Lambton Heights, NSW 2305, Australia The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
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Aitken RJ. Lessons learned in Andrology: revelations on a road less traveled. Andrology 2015; 3:805-8. [PMID: 26311338 DOI: 10.1111/andr.12087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R J Aitken
- Priority Research Centre in Reproductive Science, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia
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Gibb Z, Lambourne SR, Quadrelli J, Smith ND, Aitken RJ. L-carnitine and pyruvate are prosurvival factors during the storage of stallion spermatozoa at room temperature. Biol Reprod 2015; 93:104. [PMID: 26316064 DOI: 10.1095/biolreprod.115.131326] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 08/26/2015] [Indexed: 11/01/2022] Open
Abstract
The spermatozoa of many stallions do not tolerate being cooled, restricting the commercial viability of these animals and necessitating the development of a chemically defined room temperature (RT) storage medium. This study examined the impact of two major modulators of oxidative phosphorylation, pyruvate (Pyr) and L-carnitine (L-C), on the storage of stallion spermatozoa at RT. Optimal concentrations of Pyr (10 mM) and L-C (50 mM) were first identified and these concentrations were then used to investigate the effects of these compounds on sperm functionality and oxidative stress at RT. Mitochondrial and cytosolic reactive oxygen species, along with lipid peroxidation, were all significantly suppressed by the addition of L-C (48 h MitoSOX Red negative: 46.2% vs. 26.1%; 48 and 72 h dihydroethidium negative: 61.6% vs. 43.1% and 64.4% vs. 46.9%, respectively; 48 and 72 h 4-hydroxynonenal negative: 37.1% vs. 23.8% and 41.6% vs. 25.7%, respectively), while the Pyr + L-C combination resulted in significantly higher motility compared to the control at 72 h (total motility: 64.2% vs. 39.4%; progressive motility: 34.2% vs. 15.2%). In addition, supplementation with L-C significantly reduced oxidative DNA damage at 72 h (9.0% vs. 15.6%). To investigate the effects of L-C as an osmolyte, comparisons were made between media that were osmotically balanced with NaCl, choline chloride, or L-C. This analysis demonstrated that spermatozoa stored in the L-C balanced medium had significantly higher total motility (55.0% vs. 39.0%), rapid motility (44.0% vs. 25.7%), and ATP levels (70.9 vs. 12.8 ng/ml) following storage compared with the NaCl treatment, while choline chloride did not significantly improve these parameters compared to the control. Finally, mass spectrometry was used to demonstrate that a combination of Pyr and L-C produced significantly higher acetyl-L-carnitine production than any other treatment (6.7 pg/10(6) spermatozoa vs. control at 4.0 pg/10(6) spermatozoa). These findings suggest that Pyr and L-C could form the basis of a novel, effective RT storage medium for equine spermatozoa.
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Affiliation(s)
- Zamira Gibb
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Sarah R Lambourne
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Julianne Quadrelli
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
| | - Nathan D Smith
- Analytical and Biomolecular Research Facility, Central Scientific Services, Research Services, University of Newcastle, Callaghan, New South Wales, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, New South Wales, Australia
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Zhang Y, Leu YR, Aitken RJ, Riediker M. Inventory of Engineered Nanoparticle-Containing Consumer Products Available in the Singapore Retail Market and Likelihood of Release into the Aquatic Environment. Int J Environ Res Public Health 2015; 12:8717-43. [PMID: 26213957 PMCID: PMC4555244 DOI: 10.3390/ijerph120808717] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 07/20/2015] [Indexed: 11/17/2022]
Abstract
Consumer products containing engineered nanoparticles (ENP) are already entering the marketplace. This leads, inter alia, to questions about the potential for release of ENP into the environment from commercial products. We have inventoried the prevalence of ENP-containing consumer products in the Singapore market by carrying out onsite assessments of products sold in all major chains of retail and cosmetic stores. We have assessed their usage patterns and estimated release factors and emission quantities to obtain a better understanding of the quantities of ENP that are released into which compartments of the aquatic environment in Singapore. Products investigated were assessed for their likelihood to contain ENP based on the declaration of ENP by producers, feature descriptions, and the information on particle size from the literature. Among the 1,432 products investigated, 138 were "confirmed" and 293 were "likely" to contain ENP. Product categories included sunscreens, cosmetics, health and fitness, automotive, food, home and garden, clothing and footwear, and eyeglass/lens coatings. Among the 27 different types of nanomaterials identified, SiO2 was predominant, followed by TiO2 and ZnO, Carbon Black, Ag, and Au. The amounts of ENP released into the aquatic system, which was estimated on the basis of typical product use, ENP concentration in the product, daily use quantity, release factor, and market share, were in the range of several hundred tons per year. As these quantities are likely to increase, it will be important to further study the fate of ENP that reach the aquatic environment in Singapore.
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Affiliation(s)
- Yuanyuan Zhang
- SAFENANO, IOM Singapore, 30 Raffles Place, #17-00 Chevron House, Singapore 048622, Singapore.
| | - Yu-Rui Leu
- SAFENANO, IOM Singapore, 30 Raffles Place, #17-00 Chevron House, Singapore 048622, Singapore.
| | - Robert J Aitken
- SAFENANO, IOM Singapore, 30 Raffles Place, #17-00 Chevron House, Singapore 048622, Singapore.
| | - Michael Riediker
- SAFENANO, IOM Singapore, 30 Raffles Place, #17-00 Chevron House, Singapore 048622, Singapore.
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Abstract
BACKGROUND Previous studies have described an association between sperm with DNA damage and a history of recurrent miscarriage (RM), although it is not clear whether there is benefit in screening for sperm DNA fragmentation and to what extent DNA fragmentation impacts upon RM. AIMS To identify what proportion of couples experiencing RM are affected by DNA fragmentation abnormalities. MATERIALS AND METHODS In this retrospective study, between 2008 and 2013, couples with a history of recurrent miscarriage (≥3 first trimester miscarriages) were investigated comprehensively for known causes (karyotype, uterine, antiphospholipid syndrome, thrombophilia) and also by semen analysis, including DNA fragmentation [sperm chromatin structure analysis (SCSA)]. Statistical analysis was performed on SPSS software with significance taken as P < 0.05. RESULTS There were 108 couples with a median sperm DNA fragmentation index (DFI) of 9.50%. Normal levels were found in 70.5% of men (DFI < 15%), 23% had high levels (DFI 15-30%), and 6.5% had very high levels (DFI > 30%). Couples with otherwise unexplained recurrent miscarriage had significantly higher DFI than those with other causes identified on routine screening (P = 0.012). CONCLUSIONS In couples experiencing RM, 30% (32/108) of men had sperm with high levels of DNA fragmentation (DFI > 15%). This may be a contributing factor to the clinical syndrome of RM, and future clinical trials of therapies for these couples are warranted.
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Affiliation(s)
- Mikaela Leach
- University of New South Wales, Sydney, NSW, Australia
| | - Robert J Aitken
- Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia
| | - Gavin Sacks
- University of New South Wales, Sydney, NSW, Australia.,St George Hospital, Kogarah, Sydney, NSW, Australia.,Royal Hospital for Women, Randwick, NSW, Australia.,IVFAustralia, Sydney, NSW, Australia
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Houston B, Curry B, Aitken RJ. Human spermatozoa possess an IL4I1 l-amino acid oxidase with a potential role in sperm function. Reproduction 2015; 149:587-96. [DOI: 10.1530/rep-14-0621] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 03/12/2015] [Indexed: 11/08/2022]
Abstract
Reactive oxygen species (ROS) are known to play an important role in the regulation of human sperm function. In this study, we demonstrate for the first time that human spermatozoa possess interleukin-induced gene 1 (IL4I1), anl-amino acid oxidase (LAAO) which is capable of generating ROS on exposure to aromatic amino acids in the presence of oxygen. The preferred substrates were found to be phenylalanine and tryptophan while the enzyme was located in the acrosomal region and midpiece of these cells. In contrast to equine and bovine spermatozoa, enzyme activity was lost as soon as the spermatozoa became non-viable. On a cell-to-cell basis human spermatozoa were also shown to generate lower levels of hydrogen peroxide than their equine counterparts on exposure to phenylalanine. Stimulation of LAAO activity resulted in the induction of several hallmarks of capacitation including tyrosine phosphorylation of the sperm flagellum and concomitant activation of phospho-SRC expression. In addition, stimulation of LAAO resulted in an increase in the levels of acrosomal exocytosis in both the presence and absence of progesterone stimulation, via mechanisms that could be significantly reversed by the presence of catalase. As is often the case with free radical-mediated phenomena, prolonged exposure of human spermatozoa to phenylalanine resulted in the stimulation of apoptosis as indicated by significant increases in mitochondrial superoxide generation and the activation of intracellular caspases. These results confirm the existence of an LAAO in human spermatozoa with a potential role in driving the redox regulation of sperm capacitation and acrosomal exocytosis.
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George S, Ho SS, Wong ESP, Tan TTY, Verma NK, Aitken RJ, Riediker M, Cummings C, Yu L, Wang ZM, Zink D, Ng Z, Loo SCJ, Ng KW. The multi-facets of sustainable nanotechnology - Lessons from a nanosafety symposium. Nanotoxicology 2015; 9:404-6. [PMID: 25976321 PMCID: PMC4496808 DOI: 10.3109/17435390.2015.1027315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An international symposium for nanosafety was held recently at the Nanyang Technological University in Singapore. Topics relating to understanding nanomaterial properties, tools, and infrastructure required for predicting hazardous outcomes, measuring nanomaterial exposure levels, systems approach for risk assessment and public’s perception of nanotechnology were covered. The need for a multidisciplinary approach, across both natural and social sciences, for developing sustainable nanotechnology solutions was heavily emphasized. This commentary highlights the major issues discussed and the commitment of the nanosafety research community in Singapore to contribute collectively to realise the vision of sustainable nanotechnology.
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Affiliation(s)
- Saji George
- Centre for Sustainable Nanotechnology, School of Chemical & Life Sciences , Nanyang Polytechnic , Singapore
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Tiede K, Hanssen SF, Westerhoff P, Fern GJ, Hankin SM, Aitken RJ, Chaudhry Q, Boxall ABA. How important is drinking water exposure for the risks of engineered nanoparticles to consumers? Nanotoxicology 2015; 10:102-10. [PMID: 25962682 DOI: 10.3109/17435390.2015.1022888] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study explored the potential for engineered nanoparticles (ENPs) to contaminate the UK drinking water supplies and established the significance of the drinking water exposure route compared to other routes of human exposure. A review of the occurrence and quantities of ENPs in different product types on the UK market as well as release scenarios, their possible fate and behaviour in raw water and during drinking water treatment was performed. Based on the available data, all the ENPs which are likely to reach water sources were identified and categorized. Worst case concentrations of ENPs in raw water and treated drinking water, using a simple exposure model, were estimated and then qualitatively compared to available estimates for human exposure through other routes. A range of metal, metal oxide and organic-based ENPs were identified that have the potential to contaminate drinking waters. Worst case predicted concentrations in drinking waters were in the low- to sub-µg/l range and more realistic estimates were tens of ng/l or less. For the majority of product types, human exposure via drinking water was predicted to be less important than exposure via other routes. The exceptions were some clothing materials, paints and coatings and cleaning products containing Ag, Al, TiO2, Fe2O3 ENPs and carbon-based materials.
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Affiliation(s)
- Karen Tiede
- a The Food & Environment Research Agency (Fera) , Sand Hutton , York , UK
| | - Steffen Foss Hanssen
- b Department of Environmental Engineering , Technical University of Denmark , Copenhagen , Denmark
| | - Paul Westerhoff
- c School of Sustainable Engineering and the Built Environment, Arizona State University , Tempe , AZ , USA
| | - Gordon J Fern
- d SAFENANO, Institute of Occupational Medicine , Edinburgh , UK
| | - Steven M Hankin
- d SAFENANO, Institute of Occupational Medicine , Edinburgh , UK
| | - Robert J Aitken
- d SAFENANO, Institute of Occupational Medicine , Edinburgh , UK .,e IOM Singapore, Chevron House , Raffles Place , Singapore , and
| | - Qasim Chaudhry
- a The Food & Environment Research Agency (Fera) , Sand Hutton , York , UK
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Abstract
One of the major causes of defective sperm function is oxidative stress, which not only disrupts the integrity of sperm DNA but also limits the fertilizing potential of these cells as a result of collateral damage to proteins and lipids in the sperm plasma membrane. The origins of such oxidative stress appear to involve the sperm mitochondria, which have a tendency to generate high levels of superoxide anion as a prelude to entering the intrinsic apoptotic cascade. Unfortunately, these cells have very little capacity to respond to such an attack because they only possess the first enzyme in the base excision repair (BER) pathway, 8-oxoguanine glycosylase 1 (OGG1). The latter successfully creates an abasic site, but the spermatozoa cannot process the oxidative lesion further because they lack the downstream proteins (APE1, XRCC1) needed to complete the repair process. It is the responsibility of the oocyte to continue the BER pathway prior to initiation of S-phase of the first mitotic division. If a mistake is made by the oocyte at this stage of development, a mutation will be created that will be represented in every cell in the body. Such mechanisms may explain the increase in childhood cancers and other diseases observed in the offspring of males who have suffered oxidative stress in their germ line as a consequence of age, environmental or lifestyle factors. The high prevalence of oxidative DNA damage in the spermatozoa of male infertility patients may have implications for the health of children conceived in vitro and serves as a driver for current research into the origins of free radical generation in the germ line.
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Affiliation(s)
- Robert J Aitken
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, NSW 2308, Australia
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Abstract
Stallion fertility is a vast subject, with a wide array of permutations that can impact reproductive performance in either positive or negative ways. This review is intended to address a mere segment of the male fertility issue, but the very essence of the male contribution to fertilisation, that of the spermatozoon. Spermatozoal ultrastructure and form-to-function are detailed and spermatozoal metabolism is discussed, with specific reference to distinctive characteristics of stallion spermatozoa. Lastly, methods for assessment of spermatozoal function are considered, with emphasis on spermatozoal motility, the acrosome reaction and spermatozoon-oocyte interactions. Closing comments address the need for development and standardisation of molecular-based assays for use with spermatozoa of stallions whose subfertility cannot be explained with conventional tests.
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Affiliation(s)
- D D Varner
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, USA
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Abstract
The relationship between stallion fertility and oxidative stress remains poorly understood. The purpose of this study was to identify criteria for thoroughbred fertility assessment by performing a logistical regression analysis using "dismount" sperm parameters as predictors and weekly per-cycle conception rate as the dependent variable. Paradoxically, positive relationships between fertility and oxidative stress were revealed, such that samples that produced pregnancies exhibited higher rates of 8-hydroxy-2'-deoxyguanosine release (1490.2% vs. 705.5 pg/ml/24 h) and lower vitality (60.5% vs. 69.6%) and acrosome integrity (40.2% vs. 50.1%) than those that did not. We hypothesized that the most fertile spermatozoa exhibited the highest levels of oxidative phosphorylation (OXPHOS), with oxidative stress simply being a by-product of intense mitochondrial activity. Accordingly, an experiment to investigate the relationship between oxidative stress and motility was conducted and revealed positive correlations between mitochondrial ROS and total motility (R² = 0.90), rapid motility (R² = 0.89), average path velocity (VAP; R² = 0.59), and curvilinear velocity (VCL; R² = 0.66). Similarly, lipid peroxidation was positively correlated with total motility (R² = 0.46), rapid motility (R² = 0.51), average path velocity (R² = 0.62), and VCL (R² = 0.56), supporting the aforementioned hypothesis. The relative importance of OXPHOS in supporting the motility of equine spermatozoa was contrasted with human spermatozoa, which primarily utilize glycolysis. In this study, mitochondrial inhibition significantly reduced the velocity (P < 0.01) and ATP (P < 0.05) content of equine, but not human, spermatozoa, emphasizing the former's relative dependence on OXPHOS. The equine is the first mammal in which such a positive relationship between oxidative stress and functionality has been observed, with implications for the management of stallion fertility in vitro and in vivo.
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Affiliation(s)
- Zamira Gibb
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and Information Technology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Sarah R Lambourne
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and Information Technology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, Discipline of Biological Sciences, Faculty of Science and Information Technology, University of Newcastle, Callaghan, New South Wales, Australia
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49
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Smith TB, Baker MA, Connaughton HS, Habenicht U, Aitken RJ. Functional deletion of Txndc2 and Txndc3 increases the susceptibility of spermatozoa to age-related oxidative stress. Free Radic Biol Med 2013; 65:872-881. [PMID: 23707457 DOI: 10.1016/j.freeradbiomed.2013.05.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/26/2013] [Accepted: 05/15/2013] [Indexed: 12/31/2022]
Abstract
Oxidative stress in the male germ line is known to be a key factor in both the etiology of male infertility and the high levels of DNA damage encountered in human spermatozoa. Because the latter has been associated with a variety of adverse clinical outcomes, including miscarriage and developmental abnormalities in the offspring, the mechanisms that spermatozoa use to defend themselves against oxidative stress are of great interest. In this context, the male germ line expresses three unique forms of thioredoxin, known as thioredoxin domain-containing proteins (Txndc2, Txndc3, and Txndc8). Two of these proteins, Txndc2 and Txndc3, retain association with the spermatozoa after spermiation and potentially play an important role in regulating the redox status of the mature gamete. To address this area, we have functionally deleted the sperm-specific thioredoxins from the male germ line of mice by either exon deletion (Txndc2) or mutation of the bioactive cysteines (Txndc3). The combined inactivation of these Txndc isoforms did not have an overall impact on spermatogenesis, epididymal sperm maturation, or fertility. However, Txndc deficiency in spermatozoa did lead to age-dependent changes in these cells as reflected by accelerated motility loss, high rates of DNA damage, increases in reactive oxygen species generation, enhanced formation of lipid aldehyde-protein adducts, and impaired protamination of the sperm chromatin. These results suggest that although there is considerable redundancy in the systems employed by spermatozoa to defend themselves against oxidative stress, the sperm-specific thioredoxins, Txndc2 and Txndc3, are critically important in protecting these cells against the increases in oxidative stress associated with paternal age.
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Affiliation(s)
- T B Smith
- Reproductive Science Group, Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - M A Baker
- Reproductive Science Group, Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - H S Connaughton
- Reproductive Science Group, Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - U Habenicht
- TRG Gynecology & Andrology and Male Health Care Research, Bayer Schering Pharma AG, Berlin, Germany
| | - R J Aitken
- Reproductive Science Group, Priority Research Centre in Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, NSW 2308, Australia.
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50
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Smith TB, De Iuliis GN, Lord T, Aitken RJ. The senescence-accelerated mouse prone 8 as a model for oxidative stress and impaired DNA repair in the male germ line. Reproduction 2013; 146:253-62. [DOI: 10.1530/rep-13-0186] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The discovery of a truncated base excision repair pathway in human spermatozoa mediated by OGG1 has raised questions regarding the effect of mutations in critical DNA repair genes on the integrity of the paternal genome. The senescence-accelerated mouse prone 8 (SAMP8) is a mouse model containing a suite of naturally occurring mutations resulting in an accelerated senescence phenotype largely mediated by oxidative stress, which is further enhanced by a mutation in theOgg1gene, greatly reducing the ability of the enzyme to excise 8-hydroxy,2′-deoxyguanosine (8OHdG) adducts. An analysis of the reproductive phenotype of the SAMP8 males revealed a high level of DNA damage in caudal epididymal spermatozoa as measured by the alkaline Comet assay. Furthermore, these lesions were confirmed to be oxidative in nature, as demonstrated by significant increases in 8OHdG adduct formation in the SAMP8 testicular tissue (P<0.05) as well as in mature spermatozoa (P<0.001) relative to a control strain (SAMR1). Despite this high level of oxidative DNA damage in spermatozoa, reactive oxygen species generation was not elevated and motility of spermatozoa was found to be similar to that for the control strain with the exception of progressive motility, which exhibited a slight but significant decline with advancing age (P<0.05). When challenged with Fenton reagents (H2O2and Fe2+), the SAMP8 spermatozoa demonstrated a highly increased susceptibility to formation of 8OHdG adducts compared with the controls (P<0.001). These data highlight the role of oxidative stress and OGG1-dependent base excision repair mechanisms in defining the genetic integrity of mammalian spermatozoa.
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