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Henkel R. Leukocytospermia and/or Bacteriospermia: Impact on Male Infertility. J Clin Med 2024; 13:2841. [PMID: 38792382 PMCID: PMC11122306 DOI: 10.3390/jcm13102841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
Infertility is a globally underestimated public health concern affecting almost 190 million people, i.e., about 17.5% of people during their lifetime, while the prevalence of male factor infertility is about 7%. Among numerous other causes, the prevalence of male genital tract infections reportedly ranges between 10% and 35%. Leukocytospermia is found in 30% of infertile men and up to 20% in fertile men. Bacterial infections cause an inflammatory response attracting leukocytes, which produce reactive oxygen species (ROS) and release cytokines, both of which can cause damage to sperm, rendering them dysfunctional. Although leukocytospermia and bacteriospermia are both clinical conditions that can negatively affect male fertility, there is still debate about their impact on assisted reproduction outcomes and management. According to World Health Organization (WHO) guidelines, leukocytes should be determined by means of the Endtz test or with monoclonal antibodies against CD15, CD68 or CD22. The cut-off value proposed by the WHO is 1 × 106 peroxidase-positive cells/mL. For bacteria, Gram staining and semen culture are regarded as the "gold standard", while modern techniques such as PCR and next-generation sequencing (NGS) are allowing clinicians to detect a wider range of pathogens. Whereas the WHO manual does not specify a specific value as a cut-off for bacterial contamination, several studies consider semen samples with more than 103 colony-forming units (cfu)/mL as bacteriospermic. The pathogenic mechanisms leading to sperm dysfunction include direct interaction of bacteria with the male germ cells, bacterial release of spermatotoxic substances, induction of pro-inflammatory cytokines and ROS, all of which lead to oxidative stress. Clinically, bacterial infections, including "silent" infections, are treatable, with antibiotics being the treatment of choice. Yet, non-steroidal antiphlogistics or antioxidants should also be considered to alleviate inflammatory lesions and improve semen quality. In an assisted reproduction set up, sperm separation techniques significantly reduce the bacterial load in the semen. Nonetheless, contamination of the semen sample with skin commensals should be prevented by applying relevant hygiene techniques. In patients where leukocytospermia is detected, the causes (e.g. infection, inflammation, varicocele, smoking, etc.) of the leukocyte infiltration have to be identified and addressed with antibiotics, anti-inflammatories or antioxidants in cases where high oxidative stress levels are detected. However, no specific strategy is available for the management of leukocytospermia. Therefore, the relationship between bacteriospermia and leukocytospermia as well as their specific impact on functional sperm parameters and reproductive outcome variables such as fertilization or clinical pregnancy must be further investigated. The aim of this narrative review is to provide an update on the current knowledge on leukocytospermia and bacteriospermia and their impact on male fertility.
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Affiliation(s)
- Ralf Henkel
- LogixX Pharma Ltd., Merlin House, Brunel Road, Theale, Reading RG7 4AB, UK;
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London W12 0HS, UK
- Department of Medical Bioscience, University of the Western Cape, Bellville 7535, South Africa
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Aghazarian A, Huf W, Klingler HC, Klatte T. The effect of seminal pathogens on standard semen parameters, sperm kinematics and seminal inflammatory markers. J Reprod Immunol 2024; 161:104183. [PMID: 38154434 DOI: 10.1016/j.jri.2023.104183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 08/29/2023] [Accepted: 12/12/2023] [Indexed: 12/30/2023]
Abstract
This study evaluated the effects of urogenital pathogens on standard semen parameters, sperm kinematics and host inflammatory response in a cohort of asymptomatic subfertile men. There were six groups based on the results of bacterial culture, including Ureaplasma urealyticum (U. Urealyticum) (n = 27), mixed comprising two or more pathogenic species (n = 28), Gardnerella Vaginalis (G. Vaginalis) (n = 15), gram-positive cocci and bacilli (g+cocci/bacilli) (n = 15), gram-negative bacilli (g-bacilli) (n = 10) and Chlamydia trachomatis (C. trachomatis) (n = 2). One control group (n = 20) and one leukocytospermic group (n = 10) were also included. Sperm quality parameters, seminal leukocytes and interleukin (IL)-6 of all groups, apart from C. trachomatis, were compared to the control group. Standard semen parameters were significantly worse in all groups except for that with g-bacilli. Progressive motility, total motility and normal sperm morphology demonstrated the most significant differences, when U. Urealyticum, leukocytospermia and mixed pathogens were detected in semen. Among sperm kinematics, the concentration of progressive motile sperm cells (CPMS), the percentage of progressive motile sperm cells (PPMS) and straightness (STR) were manifested significant declines in the presence of seminal pathogens. CPMS was affected in all groups except for G. vaginalis. Moreover, the presence of g+cocci/bacilli and g-bacilli were associated with increased seminal IL-6. Seminal leukocytes were elevated significantly only when g-bacilli were cultured in semen. We conclude that seminal pathogens can negatively affect sperm quality. The most negative effect is related to U. Urealyticum. Moreover, g+cocci/bacilli and g-bacilli can initiate an inflammatory response.
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Affiliation(s)
- Artin Aghazarian
- Department of Urology, Clinic Hietzing, Vienna, Austria; Department of Laboratory Medicine, Clinic Hietzing, Vienna, Austria.
| | - Wolfgang Huf
- Karl Landsteiner Institute for Clinical Risk Management, Vienna, Austria
| | | | - Tobias Klatte
- Department of Urology, Helios Klinikum Bad Saarow, Bad Saarow, Germany
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Budzinska M, Kamieniczna M, Wojnar L, Gill K, Piasecka M, Kups M, Fraczek M. The role of the intrinsic pathway of apoptosis in human ejaculated sperm damage under a state of scrotal heat stress. J Assist Reprod Genet 2024; 41:99-108. [PMID: 38062334 PMCID: PMC10789687 DOI: 10.1007/s10815-023-02992-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/16/2023] [Indexed: 01/17/2024] Open
Abstract
PURPOSE The study aimed to determine the associations among standard sperm characteristics and oxidative/apoptotic markers in ejaculated sperm of men exposed to prolonged scrotal hyperthermia of either environmental or clinical origin. METHODS The original study design included four research groups: professional drivers (n = 54), infertile men with varicocele (n = 78), infertile men not exposed to prolonged genital heat stress (n = 37), and fertile individuals serving as the control group (n = 29). Standard semen analysis was performed according to the 5th WHO laboratory manual. The following oxidative and apoptotic parameters of sperm were investigated: mitochondrial superoxide anion generation (MitoSOX Red dye), phosphatidylserine externalization (Annexin V binding assay), mitochondrial membrane potential (JC-1 dye), DNA fragmentation (TUNEL/PI assay), and membrane fluidity (merocyanine 540 dye). RESULTS All the studied groups presented a strong deterioration in routine sperm parameters and a strongly apoptotic phenotype in sperm, characterized by both decreased mitochondrial membrane potential and enhanced DNA fragmentation, regardless of the thermal insult. Significant induction of mitochondrial superoxide anion generation was noted only in the groups exposed to genital heat stress. A positive correlation between the production of superoxide anion in the mitochondrial chain and the level of DNA fragmentation in drivers was also noted. CONCLUSION Long-term exposure to scrotal hyperthermia in real-life situations is sufficient to reduce sperm quality in humans. The thermal stress directly induces the oxidative stress cascade in ejaculated sperm, affecting the plasma membrane fluidity, mitochondrial homeostasis, and sperm DNA integrity.
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Affiliation(s)
- Marta Budzinska
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Marzena Kamieniczna
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Lukasz Wojnar
- Clinic of Urology and Oncological Urology, Poznan University of Medical Sciences, Poznan, Poland
| | - Kamil Gill
- Department of Histology and Developmental Biology, Faculty of Health Sciences, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Malgorzata Piasecka
- Department of Histology and Developmental Biology, Faculty of Health Sciences, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Michal Kups
- Department and Clinic of Urology and Oncological Urology, Regional Specialist Hospital in Szczecin, Szczecin, Poland
- The Fertility Partnership Vitrolive in Szczecin, Szczecin, Poland
| | - Monika Fraczek
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland.
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Bernaschina-Rivera SA, López-Chaim AI, Cordero-Pacheco JA, Fernández-Crespo R, Quesada-Olarte J, Carrión R. Circumcision and Sexual Medicine. Sex Med Rev 2023; 11:412-420. [PMID: 37085961 DOI: 10.1093/sxmrev/qead009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 01/26/2023] [Accepted: 02/18/2023] [Indexed: 04/23/2023]
Abstract
INTRODUCTION Male circumcision is one of the most frequently performed and debated urological procedures due to its possible implications for sexual health. OBJECTIVES The objective of this article is to review the literature on male circumcision and reconcile the scientific evidence to improve the quality of care, patient education, and clinician decision-making regarding the effects on sexual function of this procedure. METHODS A review of the published literature regarding male circumcision was performed on PubMed. The criteria for selecting resources prioritized systematic reviews and cohort studies pertinent to sexual dysfunction, with a preference for recent publications. RESULTS Despite the conflicting data reported in articles, the weight of the scientific evidence suggests there is not sufficient data to establish a direct association between male circumcision and sexual dysfunction. CONCLUSION This review provides clinicians with an updated summary of the best available evidence on male circumcision and sexual dysfunction for evidenced-based quality of care and patient education.
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Affiliation(s)
| | | | | | - Raúl Fernández-Crespo
- University of South Florida, Morsani College of Medicine, Tampa, FL 33602, United States
| | - José Quesada-Olarte
- University of South Florida, Morsani College of Medicine, Tampa, FL 33602, United States
| | - Rafael Carrión
- University of South Florida, Morsani College of Medicine, Tampa, FL 33602, United States
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Ďuračka M, Benko F, Chňapek M, Tvrdá E. Strategies for Bacterial Eradication from Human and Animal Semen Samples: Current Options and Future Alternatives. SENSORS (BASEL, SWITZERLAND) 2023; 23:6978. [PMID: 37571761 PMCID: PMC10422635 DOI: 10.3390/s23156978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/13/2023]
Abstract
The primary role of semen processing and preservation is to maintain a high proportion of structurally and functionally competent and mature spermatozoa, that may be used for the purposes of artificial reproduction when needed, whilst minimizing any potential causes of sperm deterioration during ex vivo semen handling. Out of a multitude of variables determining the success of sperm preservation, bacterial contamination has been acknowledged with an increased interest because of its often unpredictable and complex effects on semen quality. Whilst antibiotics are usually the most straight-forward option to prevent the bacterial contamination of semen, antimicrobial resistance has become a serious threat requiring widespread attention. As such, besides discussing the consequences of bacteriospermia on the sperm vitality and the risks of antibiotic overuse in andrology, this paper summarizes the currently available evidence on alternative strategies to prevent bacterial contamination of semen prior to, during, and following sperm processing, selection, and preservation. Alternative antibacterial supplements are reviewed, and emphasis is given to modern methods of sperm selection that may be combined by the physical removal of bacteria prior to sperm preservation or by use in assisted reproductive technologies.
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Affiliation(s)
- Michal Ďuračka
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Filip Benko
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Milan Chňapek
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Eva Tvrdá
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
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Tvrdá E, Ďuračka M, Benko F, Kováčik A, Lovíšek D, Gálová E, Žiarovská J, Schwarzová M, Kačániová M. Ejaculatory Abstinence Affects the Sperm Quality in Normozoospermic Men-How Does the Seminal Bacteriome Respond? Int J Mol Sci 2023; 24:ijms24043503. [PMID: 36834909 PMCID: PMC9963725 DOI: 10.3390/ijms24043503] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/01/2023] [Accepted: 02/04/2023] [Indexed: 02/12/2023] Open
Abstract
This study was designed to describe bacterial profiles of ejaculates collected following a long and short ejaculatory abstinence set in the context of changes in the conventional, oxidative, and immunological characteristics of semen. Two specimens were collected in succession from normozoospermic men (n = 51) following 2 days and 2 h, respectively. Semen samples were processed and analyzed according to the World Health Organization (WHO) 2021 guidelines. Afterwards, sperm DNA fragmentation, mitochondrial function, levels of reactive oxygen species (ROS), total antioxidant capacity, and oxidative damage to sperm lipids and proteins were evaluated in each specimen. Selected cytokine levels were quantified using the ELISA method. Bacterial identification by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry revealed that samples collected following two days of abstinence presented with a higher bacterial load and diversity, and a greater prevalence of potentially uropathogenic bacteria including Escherichia coli, Staphylococcus aureus and Enterococcus faecalis. Only staphylococci and Escherichia coli remained present in specimens obtained after 2 h of abstinence. Whilst all samples accomplished the criteria set by WHO, a significantly higher motility (p < 0.05), membrane integrity (p < 0.05), mitochondrial membrane potential (p < 0.05), and DNA integrity (p < 0.0001) were detected following 2 h of ejaculatory abstinence. On the other hand, significantly higher ROS levels (p < 0.001), protein oxidation (p < 0.001), and lipid peroxidation (p < 0.01) accompanied by significantly higher concentrations of tumor necrosis factor alpha (p < 0.05), interleukin-6 (p < 0.01), and interferon gamma (p < 0.05) were observed in specimens collected after two days of abstinence. It may be summarized that shorter ejaculatory abstinence does not compromise sperm quality in normozoospermic men, while it contributes to a decreased occurrence of bacteria in semen which is accompanied by a lower probability of damage to spermatozoa by ROS or pro-inflammatory cytokines.
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Affiliation(s)
- Eva Tvrdá
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
- Correspondence: ; Tel.: +421-37-641-4918
| | - Michal Ďuračka
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Filip Benko
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Anton Kováčik
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Daniel Lovíšek
- Department of Genetics, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská Dolina, 84215 Bratislava, Slovakia
| | - Eliška Gálová
- Department of Genetics, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Mlynská Dolina, 84215 Bratislava, Slovakia
| | - Jana Žiarovská
- Institute of Plant and Environmental Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Marianna Schwarzová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Miroslava Kačániová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
- Department of Bioenergetics, Food Analysis and Microbiology, Institute of Food Technology and Nutrition, University of Rzeszow, Cwiklinskiej 1, 35-601 Rzeszow, Poland
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Tvrdá E, Petrovičová M, Benko F, Ďuračka M, Kováč J, Slanina T, Galovičová L, Žiarovská J, Kačániová M. Seminal Bacterioflora of Two Rooster Lines: Characterization, Antibiotic Resistance Patterns and Possible Impact on Semen Quality. Antibiotics (Basel) 2023; 12:antibiotics12020336. [PMID: 36830247 PMCID: PMC9952488 DOI: 10.3390/antibiotics12020336] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/08/2023] Open
Abstract
This study aimed to characterize the bacterial profiles and their association with selected semen quality traits among two chicken breeds. Thirty Lohmann Brown and thirty ROSS 308 roosters were selected for semen quality estimation, including sperm motility, membrane and acrosome integrity, mitochondrial activity, and DNA fragmentation. The oxidative profile of the semen, including the production of reactive oxygen species (ROS), antioxidant capacity, protein, and lipid oxidation, were assessed as well. Moreover, the levels of pro-inflammatory cytokines, including tumor necrosis factor alpha (TNF-α), interleukins 1 and 6 (IL-1, IL-6) and C-reactive protein, as well as the concentrations of selected antibacterial proteins (cathelicidin, β-defensin and lysozyme) in the seminal plasma were evaluated with the enzyme-linked immunosorbent assay. The prevailing bacterial genera identified by the matrix-assisted laser desorption/ionization time-of-flight mass spectrometry were Citrobacter spp., Enterococcus spp., Escherichia spp. and Staphylococcus spp. While the bacterial load was significantly higher in the ROSS 308 line (p < 0.05), a higher number of potentially uropathogenic bacteria was found in the Lohmann Brown roosters. Antimicrobial susceptibility tests revealed a substantial resistance of randomly selected bacterial strains, particularly to ampicillin, tetracycline, chloramphenicol, and tobramycin. Furthermore, Lohmann Brown ejaculates containing an increased proportion of Escherichia coli presented with significantly (p < 0.05) elevated levels of TNF-α and IL-6, as well as ROS overproduction and lipid peroxidation. Inversely, significantly (p < 0.05) higher levels of β-defensin and lysozyme were found in the semen collected from the ROSS 308 roosters, which was characterized by a higher quality in comparison to the Lohmann Brown roosters. In conclusion, we emphasize the criticality of bacteriospermia in the poultry industry and highlight the need to include a more complex microbiological screening of semen samples designated for artificial insemination.
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Affiliation(s)
- Eva Tvrdá
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
- Correspondence: ; Tel.: +421-37-641-4918
| | - Michaela Petrovičová
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
- Department of Neuroscience, Second Faculty of Medicine (2. LF UK), V Úvalu 84, 15006 Prague, Czech Republic
| | - Filip Benko
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Michal Ďuračka
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Ján Kováč
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Tomáš Slanina
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Lucia Galovičová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Jana Žiarovská
- Institute of Plant and Environmental Sciences, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
| | - Miroslava Kačániová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia
- Department of Bioenergetics, Food Analysis and Microbiology, Institute of Food Technology and Nutrition, University of Rzeszow, Cwiklinskiej 1, 35-601 Rzeszow, Poland
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Tvrdá E, Petrovičová M, Benko F, Ďuračka M, Galovičová L, Slanina T, Kačániová M. Curcumin Attenuates Damage to Rooster Spermatozoa Exposed to Selected Uropathogens. Pharmaceutics 2022; 15:65. [PMID: 36678694 PMCID: PMC9861644 DOI: 10.3390/pharmaceutics15010065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
Artificial insemination, as an essential pillar of the modern poultry industry, primarily depends on the quality of semen collected from stud roosters. Since the collection and storage of ejaculates is not a sterile process, antimicrobial agents have become essential supplements to semen extenders. While the use of traditional antibiotics has been challenged because of rising bacterial resistance, natural biomolecules represent an appealing alternative because of their antibacterial and antioxidant properties. As such, this study strived to compare the effects of 50 μmol/L curcumin (CUR) with 31.2 µg/mL kanamycin (KAN) as a conventional antibiotic on rooster sperm quality in the presence of Salmonella enterica, Escherichia coli and Pseudomonas aeruginosa. Changes in sperm structural integrity and functional activity were monitored at 2 and 24 h of culture. Computer-assisted semen analysis revealed significant sperm motility preservation following treatment with KAN, particularly in the case of Salmonella enterica and Pseudomonas aeruginosa (p < 0.001) after 24 h. On the other hand, CUR was more effective in opposing ROS overproduction by all bacteria (p < 0.05), as determined by luminol-based luminometry, and maintained sperm mitochondrial activity (p < 0.001 in the case of Salmonella enterica; p < 0.05 with respect to Escherichia coli and Pseudomonas aeruginosa), as assessed by the fluorometric JC-1 assay. The TUNEL assay revealed that CUR readily preserved the DNA integrity of rooster sperm exposed to Salmonella enterica (p < 0.01) and Escherichia coli (p < 0.001). The bacteriological analysis showed higher efficiency of KAN in preventing the growth of all selected bacterial species (p < 0.0001) as opposed to CUR. In conclusion, CUR provided protection to rooster spermatozoa against alterations caused by uropathogens, most likely through its antioxidant activity. Hence, CUR supplementation to poultry semen extenders in combination with properly selected antibacterial substances may become an interesting strategy in the management of bacterial contamination during semen storage.
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Affiliation(s)
- Eva Tvrdá
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Michaela Petrovičová
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
- Department of Neuroscience, Second Faculty of Medicine (2. LF UK), V Úvalu 84, 150 06 Prague, Czech Republic
| | - Filip Benko
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Michal Ďuračka
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Lucia Galovičová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Tomáš Slanina
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Miroslava Kačániová
- Department of Fruit Science, Viticulture and Enology, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
- Department of Bioenergetics, Food Analysis and Microbiology, Institute of Food Technology and Nutrition, University of Rzeszow, Cwiklinskiej 1, 35-601 Rzeszow, Poland
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Escada-Rebelo S, Cristo MI, Ramalho-Santos J, Amaral S. Mitochondria-Targeted Compounds to Assess and Improve Human Sperm Function. Antioxid Redox Signal 2022; 37:451-480. [PMID: 34847742 DOI: 10.1089/ars.2021.0238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Significance: Currently 10%-15% of couples in reproductive age face infertility issues. More importantly, male factor contributes to 50% of these cases (either alone or in combination with female causes). Among various reasons, impaired sperm function is the main cause for male infertility. Furthermore, mitochondrial dysfunction and oxidative stress due to increased reactive oxygen species (ROS) production, particularly of mitochondrial origin, are believed to be the main contributors. Recent Advances: Mitochondrial dysfunction, particularly due to increased ROS production, has often been linked to impaired sperm function/quality. For decades, different methods and approaches have been developed to assess mitochondrial features that might correlate with sperm functionality. This connection is now completely accepted, with mitochondrial functionality assessment used more commonly as a readout of sperm functionality. More recently, mitochondria-targeted compounds are on the frontline for both assessment and therapeutic approaches. Critical Issues: In this review, we summarize the current methods for assessing key mitochondrial parameters known to reflect sperm quality as well as therapeutic strategies using mitochondria-targeted antioxidants aiming to improve sperm function in various situations, particularly after sperm cryopreservation. Future Directions: Although more systematic research is needed, mitochondria-targeted compounds definitely represent a promising tool to assess as well as to protect and improve sperm function. Antioxid. Redox Signal. 37, 451-480.
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Affiliation(s)
- Sara Escada-Rebelo
- PhD Programme in Experimental Biology and Biomedicine, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Biology of Reproduction and Stem Cell Group, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,IIIUC - Institute for Interdisciplinary Research, Casa Costa Alemão, University of Coimbra, Coimbra, Portugal
| | - Maria Inês Cristo
- Biology of Reproduction and Stem Cell Group, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - João Ramalho-Santos
- Biology of Reproduction and Stem Cell Group, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Sandra Amaral
- Biology of Reproduction and Stem Cell Group, Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.,IIIUC - Institute for Interdisciplinary Research, Casa Costa Alemão, University of Coimbra, Coimbra, Portugal
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Tvrdá E, Ďuračka M, Benko F, Lukáč N. Bacteriospermia - A formidable player in male subfertility. Open Life Sci 2022; 17:1001-1029. [PMID: 36060647 PMCID: PMC9386612 DOI: 10.1515/biol-2022-0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/29/2022] [Accepted: 05/18/2022] [Indexed: 11/24/2022] Open
Abstract
Bacterial colonization of male reproductive tissues, cells, and fluids, and the subsequent impact of bacteria on the sperm architecture, activity, and fertilizing potential, has recently gained increased attention from the medical and scientific community. Current evidence strongly emphasizes the fact that the presence of bacteria in semen may have dire consequences on the resulting male fertility. Nevertheless, the molecular basis underlying bacteriospermia-associated suboptimal semen quality is sophisticated, multifactorial, and still needs further understanding. Bacterial adhesion and subsequent sperm agglutination and immobilization represent the most direct pathway of sperm-bacterial interactions. Furthermore, the release of bacterial toxins and leukocytic infiltration, associated with a massive outburst of reactive oxygen species, have been repeatedly associated with sperm dysfunction in bacteria-infested semen. This review serves as a summary of the present knowledge on bacteriospermia-associated male subfertility. Furthermore, we strived to outline the currently available methods for assessing bacterial profiles in semen and to outline the most promising strategies for the prevention and/or management of bacteriospermia in practice.
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Affiliation(s)
- Eva Tvrdá
- Department of Animal Physiology, Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra-Chrenová, 949 76, Slovakia
| | - Michal Ďuračka
- Department of Animal Physiology, Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra-Chrenová, 949 76, Slovakia
| | - Filip Benko
- Department of Animal Physiology, Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra-Chrenová, 949 76, Slovakia
| | - Norbert Lukáč
- Department of Animal Physiology, Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, Nitra-Chrenová, 949 76, Slovakia
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11
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Possible Implications of Bacteriospermia on the Sperm Quality, Oxidative Characteristics, and Seminal Cytokine Network in Normozoospermic Men. Int J Mol Sci 2022; 23:ijms23158678. [PMID: 35955814 PMCID: PMC9369207 DOI: 10.3390/ijms23158678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/27/2022] [Accepted: 08/02/2022] [Indexed: 02/06/2023] Open
Abstract
This study focused on the identification of bacterial profiles of semen in normozoospermic men and their possible involvement in changes to the sperm structural integrity and functional activity. Furthermore, we studied possible fluctuations of selected cytokines, oxidative markers, and antibacterial proteins as a result of bacterial presence in the ejaculate. Sperm motility was assessed with computer-assisted sperm analysis, while sperm apoptosis, necrosis and acrosome integrity were examined with fluorescent methods. Reactive oxygen species (ROS) generation was quantified via luminometry, sperm DNA fragmentation was evaluated using the TUNEL protocol and chromatin-dispersion test, while the JC-1 assay was applied to evaluate the mitochondrial membrane potential. Cytokine levels were quantified with the biochip assay, whilst selected antibacterial proteins were quantified using the ELISA method. The predominant species identified by the matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry were Staphylococcus hominis, Staphylococcus capitis and Micrococcus luteus. The results revealed that the sperm quality decreased proportionally to the increasing bacterial load and occurrence of conditionally pathogenic bacteria, including Enterococcus faecalis, Staphylococcus aureus and Escherichia coli. Antimicrobial susceptibility tests revealed a substantial resistance of randomly selected bacterial strains to ampicillin, vancomycin, tobramycin, and tetracycline. Furthermore, an increased bacterial quantity in semen was accompanied by elevated levels of pro-inflammatory cytokines, including interleukin-1, interleukin-2, interleukin-6, tumor necrosis factor alpha as well as ROS overproduction and lipid peroxidation of the sperm membranes. Our results suggest that semen quality may be notably affected by the bacterial quantity as well as quality. It seems that bacteriospermia may be associated with inflammatory processes, oxidative stress, sperm structural deterioration, and a subsequent risk for the development of subfertility, even in normozoospermic males.
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12
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Bacteriospermia and Male Infertility: Role of Oxidative Stress. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1358:141-163. [PMID: 35641869 DOI: 10.1007/978-3-030-89340-8_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Male infertility is one of the major challenging and prevalent diseases having diverse etiologies of which bacteriospermia play a significant role. It has been estimated that approximately 15% of all infertility cases are due to infections caused by uropathogens and in most of the cases bacteria are involved in infection and inflammation leading to the development of bacteriospermia. In response to bacterial load, excess infiltration of leukocytes in the urogenital tract occurs and concomitantly generates oxidative stress (OS). Bacteria may induce infertility either by directly interacting with sperm or by generating reactive oxygen species (ROS) and impair sperm parameters such as motility, volume, capacitation, hyperactivation. They may also induce apoptosis leading to sperm death. Acute bacteriospermia is related with another clinical condition called leukocytospermia and both compromise male fertility potential by OS-mediated damage to sperm leading to male infertility. However, bacteriospermia as a clinical condition as well as the mechanism of action remains poorly understood, necessitating further research in order to understand the role of individual bacterial species and their impact in male infertility.
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13
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Clinical Infections, Antibiotic Resistance, and Pathogenesis of Staphylococcus haemolyticus. Microorganisms 2022; 10:microorganisms10061130. [PMID: 35744647 PMCID: PMC9231169 DOI: 10.3390/microorganisms10061130] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/27/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
Staphylococcus haemolyticus (S. haemolyticus) constitutes the main part of the human skin microbiota. It is widespread in hospitals and among medical staff, resulting in being an emerging microbe causing nosocomial infections. S. haemolyticus, especially strains that cause nosocomial infections, are more resistant to antibiotics than other coagulase-negative Staphylococci. There is clear evidence that the resistance genes can be acquired by other Staphylococcus species through S. haemolyticus. Severe infections are recorded with S. haemolyticus such as meningitis, endocarditis, prosthetic joint infections, bacteremia, septicemia, peritonitis, and otitis, especially in immunocompromised patients. In addition, S. haemolyticus species were detected in dogs, breed kennels, and food animals. The main feature of pathogenic S. haemolyticus isolates is the formation of a biofilm which is involved in catheter-associated infections and other nosocomial infections. Besides the biofilm formation, S. haemolyticus secretes other factors for bacterial adherence and invasion such as enterotoxins, hemolysins, and fibronectin-binding proteins. In this review, we give updates on the clinical infections associated with S. haemolyticus, highlighting the antibiotic resistance patterns of these isolates, and the virulence factors associated with the disease development.
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14
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Khan K, Basharat Z, Jalal K, Mashraqi MM, Alzamami A, Alshamrani S, Uddin R. Identification of Therapeutic Targets in an Emerging Gastrointestinal Pathogen Campylobacter ureolyticus and Possible Intervention through Natural Products. Antibiotics (Basel) 2022; 11:antibiotics11050680. [PMID: 35625323 PMCID: PMC9137744 DOI: 10.3390/antibiotics11050680] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/09/2022] [Accepted: 05/16/2022] [Indexed: 02/04/2023] Open
Abstract
Campylobacter ureolyticus is a Gram-negative, anaerobic, non-spore-forming bacteria that causes gastrointestinal infections. Being the most prevalent cause of bacterial enteritis globally, infection by this bacterium is linked with significant morbidity and mortality in children and immunocompromised patients. No information on pan-therapeutic drug targets for this species is available yet. In the current study, a pan-genome analysis was performed on 13 strains of C. ureolyticus to prioritize potent drug targets from the identified core genome. In total, 26 druggable proteins were identified using subtractive genomics. To the best of the authors’ knowledge, this is the first report on the mining of drug targets in C. ureolyticus. UDP-3-O-acyl-N-acetylglucosamine deacetylase (LpxC) was selected as a promiscuous pharmacological target for virtual screening of two bacterial-derived natural product libraries, i.e., postbiotics (n = 78) and streptomycin (n = 737) compounds. LpxC inhibitors from the ZINC database (n = 142 compounds) were also studied with reference to LpxC of C. ureolyticus. The top three docked compounds from each library (including ZINC26844580, ZINC13474902, ZINC13474878, Notoginsenoside St-4, Asiaticoside F, Paraherquamide E, Phytoene, Lycopene, and Sparsomycin) were selected based on their binding energies and validated using molecular dynamics simulations. To help identify potential risks associated with the selected compounds, ADMET profiling was also performed and most of the compounds were considered safe. Our findings may serve as baseline information for laboratory studies leading to the discovery of drugs for use against C. ureolyticus infections.
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Affiliation(s)
- Kanwal Khan
- PCMD, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (K.K.); (R.U.)
| | - Zarrin Basharat
- Jamil-ur-Rahman Center for Genome Research, Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan;
| | - Khurshid Jalal
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
- Correspondence:
| | - Mutaib M. Mashraqi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Najran University, Najran 61441, Saudi Arabia; (M.M.M.); (S.A.)
| | - Ahmad Alzamami
- Clinical Laboratory Science Department, College of Applied Medical Science, Shaqra University, Al-Quwayiyah 11961, Saudi Arabia;
| | - Saleh Alshamrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Najran University, Najran 61441, Saudi Arabia; (M.M.M.); (S.A.)
| | - Reaz Uddin
- PCMD, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; (K.K.); (R.U.)
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15
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Sharma R, Gupta S, Agarwal A, Henkel R, Finelli R, Parekh N, Saleh R, Arafa M, Ko E, Zini A, Tadros N, Shah R, Ambar RF, Elbardisi H, Sengupta P, Martinez M, Boitrelle F, Simopoulou M, Vogiatzi P, Gosalvez J, Kavoussi P, Kandil H, Palani A, Rodriguez Peña M, Rajmil O, Busetto GM, Anagnostopoulou C, Micic S, Alves MG, Rocco L, Mostafa T, Alvarez JG, Jindal S, Sallam HN, Maldonado Rosas I, Lewis SEM, AlSaid S, Altan M, Park HJ, Ramsay J, Parekattil S, Sabbaghian M, Tremellen K, Khalafalla K, Durairajanayagam D, Colpi GM. Relevance of Leukocytospermia and Semen Culture and Its True Place in Diagnosing and Treating Male Infertility. World J Mens Health 2022; 40:191-207. [PMID: 34169683 PMCID: PMC8987138 DOI: 10.5534/wjmh.210063] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/17/2021] [Accepted: 04/21/2021] [Indexed: 02/05/2023] Open
Abstract
The current WHO 2010 manual for human semen analysis defines leukocytospermia as the presence of peroxidase-positive leukocytes at a concentration >1×106/mL of semen. Granular leukocytes when activated are capable of generating high levels of reactive oxygen species in semen resulting in oxidative stress. Oxidative stress has been correlated with poor sperm quality, increased level of sperm DNA fragmentation and low fertility potential. The presence of leukocytes and pathogens in the semen may be a sign of infection and/or localized inflammatory response in the male genital tract and the accessory glands. Common uro-pathogens including Chlamydia trachomatis, Ureaplasma urealyticum, Neisseria gonorrhoeae, Mycoplasma hominis, and Escherichia coli can cause epididymitis, epididymo-orchitis, or prostatitis. The relationship between leukocytospermia and infection is unclear. Therefore, we describe the pathogens responsible for male genital tract infections and their association with leukocytospermia. The review also examines the diagnostic tests available to identify seminal leukocytes. The role of leukocytospermia in male infertility and its management is also discussed.
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Affiliation(s)
- Rakesh Sharma
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Sajal Gupta
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Ashok Agarwal
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA.
| | - Ralf Henkel
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
- Department of Medical Bioscience, University of the Western Cape, Bellville, South Africa
| | - Renata Finelli
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Neel Parekh
- Department of Urology, Cleveland Clinic, Cleveland, OH, USA
| | - Ramadan Saleh
- Department of Dermatology, Venereology and Andrology, Faculty of Medicine, Sohag University, Sohag, Egypt
| | - Mohamed Arafa
- American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
- Department of Urology, Hamad Medical Corporation, Doha, Qatar
- Department of Urology, Weill Cornell Medical-Qatar, Doha, Qatar
| | - Edmund Ko
- Department of Urology, Loma Linda University Health, Loma Linda, CA, USA
| | - Armand Zini
- Department of Surgery, McGill University, Montreal, Canada
| | - Nicholas Tadros
- Division of Urology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Rupin Shah
- Department of Urology, Lilavati Hospital and Research Centre, Mumbai, India
| | - Rafael F Ambar
- Department of Urology, Centro Universitario em Saude do ABC/Andrology Group at Ideia Fertil Institute of Human Reproduction, Santo André, Brazil
| | - Haitham Elbardisi
- Department of Urology, Hamad Medical Corporation, Doha, Qatar
- Department of Urology, Weill Cornell Medical-Qatar, Doha, Qatar
| | - Pallav Sengupta
- Department of Physiology, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom, Selangor, Malaysia
| | - Marlon Martinez
- Section of Urology, University of Santo Tomas Hospital, Manila, Philippines
| | - Florence Boitrelle
- Reproductive Biology, Fertility Preservation, Andrology, CECOS, Poissy Hospital, Poissy, France
- Paris Saclay University, UVSQ, INRAE, BREED, Jouy-en-Josas, France
| | - Mara Simopoulou
- Department of Physiology, School of Medicine, National & Kapodistrian University of Athens, Maroussi, Athens, Greece
| | - Paraskevi Vogiatzi
- Andromed Health & Reproduction, Fertility Diagnostics Laboratory, Maroussi, Greece
| | - Jaime Gosalvez
- Departamento de Biología, Universidad Autónoma de Madrid, Madrid, Spain
| | - Parviz Kavoussi
- Austin Fertility and Reproductive Medicine/Westlake IVF, Department of Urology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | | | - Ayad Palani
- Department of Biochemistry, College of Medicine, University of Garmian, Kalar, Iraq
| | - Marcelo Rodriguez Peña
- Departamento Docencia e Investigación, Hospital Militar Campo de Mayo, Universidad Barcelo, Buenos Aires, Argentina
| | - Osvaldo Rajmil
- Clinical and training Centre of the European Academy of Andrology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Gian Maria Busetto
- Department of Urology and Renal Transplantation, University of Foggia Policlinico Riuniti of Foggia, Foggia, Italy
| | | | - Sava Micic
- Department of Andrology, Uromedica Polyclinic, Belgrade, Serbia
| | - Marco G Alves
- Department of Anatomy & Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Lucia Rocco
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), University of Campania Luigi Vanvitelli, Caserta, Italy
| | - Taymour Mostafa
- Department of Andrology, Sexology & STIs, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Juan G Alvarez
- Centro ANDROGEN, La Coruña, Spain
- Department of Obstetrics, Gynecology, and Reproductive Biology, Harvard Medical School, Boston, MA, USA
| | - Sunil Jindal
- Department of Andrology and Reproductive Medicine, Jindal Hospital, Meerut, India
| | - Hassan N Sallam
- Department of Obstetrics and Gynaecology, Alexandria University Faculty of Medicine, Alexandria, Egypt
| | - Israel Maldonado Rosas
- Centerf Technological Innovation, and Reproductive Medicine (CITMER), Mexico City, Mexico
| | - Sheena E M Lewis
- Examenlab Ltd., Weavers Court Business Park, Linfield Road, Belfast, Northern Ireland, UK
| | - Sami AlSaid
- Department of Urology, Hamad Medical Corporation, Doha, Qatar
| | - Mesut Altan
- Department of Urology, Haceppete University, Ankara, Turkey
| | - Hyun Jun Park
- Department of Urology, Pusan National University School of Medicine, Busan, Korea
- Medical Research Institute of Pusan National University Hospital, Busan, Korea
| | | | - Sijo Parekattil
- Avant Concierge Urology & University of Central Florida, Winter Garden, FL, USA
| | - Marjan Sabbaghian
- Department of Andrology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Kelton Tremellen
- Department of Obstetrics Gynaecology and Reproductive Medicine, Flinders University, Adelaide, South Australia
| | | | - Damayanthi Durairajanayagam
- Department of Physiology, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Selangor, Malaysia
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16
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Wang S, Zhang K, Yao Y, Li J, Deng S. Bacterial Infections Affect Male Fertility: A Focus on the Oxidative Stress-Autophagy Axis. Front Cell Dev Biol 2021; 9:727812. [PMID: 34746124 PMCID: PMC8566953 DOI: 10.3389/fcell.2021.727812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 10/04/2021] [Indexed: 12/21/2022] Open
Abstract
Numerous factors trigger male infertility, including lifestyle, the environment, health, medical resources and pathogenic microorganism infections. Bacterial infections of the male reproductive system can cause various reproductive diseases. Several male reproductive organs, such as the testicles, have unique immune functions that protect the germ cells from damage. In the reproductive system, immune cells can recognize the pathogen-associated molecular patterns carried by pathogenic microorganisms and activate the host's innate immune response. Furthermore, bacterial infections can lead to oxidative stress through multiple signaling pathways. Many studies have revealed that oxidative stress serves dual functions: moderate oxidative stress can help clear the invaders and maintain sperm motility, but excessive oxidative stress will induce host damage. Additionally, oxidative stress is always accompanied by autophagy which can also help maintain host homeostasis. Male reproductive system homeostasis disequilibrium can cause inflammation of the genitourinary system, influence spermatogenesis, and even lead to infertility. Here, we focus on the effect of oxidative stress and autophagy on bacterial infection in the male reproductive system, and we also explore the crosslink between oxidative stress and autophagy during this process.
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Affiliation(s)
- Sutian Wang
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Kunli Zhang
- Institute of Animal Health, Guangdong Provincial Key Laboratory of Livestock Disease Prevention, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yuchang Yao
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Jianhao Li
- State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Maoming, China
| | - Shoulong Deng
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, China
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17
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Nabi A, Khalili MB, Eslami G, Vakili M, Anbari F, Torki A. A comparison of different O-antigen serogroups of Escherichia coli in semen samples of fertile and infertile men. Clin Exp Reprod Med 2021; 49:33-39. [PMID: 35172539 PMCID: PMC8923631 DOI: 10.5653/cerm.2020.04161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 05/25/2021] [Indexed: 11/08/2022] Open
Abstract
Objective Male genital tract infections have been associated with infertility, and Escherichia coli has drawn increasing attention as an important bacterium in this context. This investigation aimed to characterize and compare the distributions of O-antigen serogroups of E. coli in the semen samples of fertile and infertile men. Methods In this case-control study, semen samples were collected from 618 fertile and 1,535 infertile men. The E. coli-positive samples were evaluated in terms of concentration, morphology, viability, and motility parameters according to the World Health Organization 2010 guidelines. Finally, different serogroups of E. coli were identified by multiplex polymerase chain reaction targeting the O-antigen variations of the bacterium. Results The prevalence of E. coli among fertile men was significantly higher than among infertile men (p<0.001). The sperm morphology, viability, and motility in the E. coli-positive fertile group were significantly higher than in the E. coli-positive infertile group (p<0.001). E. coli O6 was the most prevalent serogroup found in both groups. However, there was no significant difference in the frequency of different serogroups of E. coil between the two groups (p=0.55). Conclusion Despite the higher prevalence of E. coli among fertile men, E. coli had more detrimental effects on semen parameters in infertile men. There was no significant difference in E. coli serogroups between the fertile and infertile groups.
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Affiliation(s)
- Ali Nabi
- Andrology Research Center, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Department of Reproductive Biology, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Bagher Khalili
- Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Gilda Eslami
- Research Center for Food Hygiene and Safety, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mahmood Vakili
- Community Medicine, Monitoring of Health Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Fatemeh Anbari
- Department of Reproductive Biology, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Research and Clinical Center for Infertility, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Alireza Torki
- Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Corresponding author: Alireza Torki Department of Microbiology, School of Medicine, Shahid Sadoughi University of Medical Sciences,Javan Blvd., Safayeh, Yazd 8916978477, Iran Tel: +98-91-3250-8432 Fax: +98-91-3250-8432 E-mail:
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18
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Effects of common Gram-negative pathogens causing male genitourinary-tract infections on human sperm functions. Sci Rep 2021; 11:19177. [PMID: 34584150 PMCID: PMC8478950 DOI: 10.1038/s41598-021-98710-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 09/06/2021] [Indexed: 02/08/2023] Open
Abstract
Male genitourinary tract (MGT) bacterial infections are considered responsible for 15% of male infertility, but the mechanisms underlying decreased semen quality are poorly known. We evaluated in vitro the effect of strains of Gram-negative uropathogenic species (two E.coli strains, three K. pneumoniae strains, P. aeruginosa and E. cloacae) on motility, viability, mitochondrial oxidative status, DNA fragmentation and caspase activity of human spermatozoa. All strains, except P. aeruginosa, reduced significantly sperm motility, with variable effects. Sperm Immobilizing Factor (SIF) was largely responsible for deteriorating effects on sperm motility of E. coli strains since they were completely reverted by knockout of SIF coding recX gene. Sequence alignment for RecX showed the presence of high homologous sequences in K. pneumoniae and E. cloacae but not in P. aeruginosa. These results suggest that, in addition to E.coli, other common uropathogenic Gram-negative bacteria affect sperm motility through RecX products. In addition to sperm motility, the E. coli strain ATCC 35218 also affected sperm viability, and induced caspase activity, oxidative stress and DNA fragmentation suggesting an interspecies variability in the amount and/or type of the produced spermatotoxic factors. In general, our results highlight the need for a careful evaluation of semen infections in the diagnostic process of the infertile man.
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19
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Molina NM, Plaza-Díaz J, Vilchez-Vargas R, Sola-Leyva A, Vargas E, Mendoza-Tesarik R, Galán-Lázaro M, Mendoza-Ladrón de Guevara N, Tesarik J, Altmäe S. Assessing the testicular sperm microbiome: a low-biomass site with abundant contamination. Reprod Biomed Online 2021; 43:523-531. [PMID: 34344601 DOI: 10.1016/j.rbmo.2021.06.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/19/2021] [Accepted: 06/22/2021] [Indexed: 12/31/2022]
Abstract
RESEARCH QUESTION The semen harbours a diverse range of microorganisms. The origin of the seminal microbes, however, has not yet been established. Do testicular spermatozoa harbour microbes and could they potentially contribute to the seminal microbiome composition? DESIGN The study included 24 samples, comprising a total of 307 testicular maturing spermatozoa. A high-throughput sequencing method targeting V3 and V4 regions of 16S rRNA gene was applied. A series of negative controls together with stringent in-silico decontamination methods were analysed. RESULTS Between 50 and 70% of all the detected bacterial reads accounted for contamination in the testicular sperm samples. After stringent decontamination, Blautia (P = 0.04), Cellulosibacter (P = 0.02), Clostridium XIVa (P = 0.01), Clostridium XIVb (P = 0.04), Clostridium XVIII (P = 0.02), Collinsella (P = 0.005), Prevotella (P = 0.04), Prolixibacter (P = 0.02), Robinsoniella (P = 0.04), and Wandonia (P = 0.04) genera demonstrated statistically significant abundance among immature spermatozoa. CONCLUSIONS Our results indicate that the human testicle harbours potential bacterial signature, though in a low-biomass, and could contribute to the seminal microbiome composition. Further, applying stringent decontamination methods is crucial for analysing microbiome in low-biomass site.
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Affiliation(s)
- Nerea M Molina
- University of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
| | - Julio Plaza-Díaz
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain; University of Granada, Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Granada 18071, Spain; Institute of Nutrition and Food Technology (INYTA), 'José Mataix Verdú' Biomedical Research Centre (CIBM), University of Granada, Granada 18016, Spain; Children's Hospital of Eastern Ontario Research Institute, Ottawa ON K1H 8L1, Canada
| | - Ramiro Vilchez-Vargas
- Department of Gastroenterology, Hepatology, and Infectious Diseases, Otto von Guericke University Hospital Magdeburg, Magdeburg 39120, Germany
| | - Alberto Sola-Leyva
- University of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain
| | - Eva Vargas
- Systems Biology Unit, Department of Experimental Biology, Faculty of Experimental Sciences, University of Jaen, Jaen 23071, Spain
| | | | - Maribel Galán-Lázaro
- MARGen Clinic, Molecular Assisted Reproduction and Genetics, Granada 18006, Spain
| | | | - Jan Tesarik
- MARGen Clinic, Molecular Assisted Reproduction and Genetics, Granada 18006, Spain
| | - Signe Altmäe
- University of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain; Competence Centre on Health Technologies, Tartu 50410, Estonia.
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20
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Gangwar C, Mishra AK, Gururaj K, Kumar A, Kharche SD, Saraswat S, Kumar R, Ramachandran N. Semen quality and total microbial load: An association study in important Indian Goat breeds during different seasons. Andrologia 2021; 53:e13995. [PMID: 33629781 DOI: 10.1111/and.13995] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/21/2020] [Accepted: 01/08/2021] [Indexed: 11/27/2022] Open
Abstract
The invasion of the male urogenital tract by microorganisms, and its subsequent effects on sperm fertilising ability, has not been well discussed in bucks. The present study was conducted to assess the bacterial load in fresh semen of the 2-6 years old bucks. For conducting the experiment, semen ejaculates from 18 bucks (6 from each breed namely Jakhrana, Jamunapari and Barbari) were used. We collected 5 ejaculates from each buck in each season (Summer-April to June, Rainy-July to Sept and Winter-November to January). Semen was collected with the artificial vagina (AV) method, and separate AV was used for each buck every time. The semen collection frequency was once in a week. Immediately after initial evaluation, collected semen samples were transferred to the microbiology laboratory of the institute. Thereafter, the semen samples were subjected to bacteriological examination to assess the microbial load. The results of the current study indicate that the microbial load in the semen was significantly (p < 0.05) higher in the Jamunapari bucks and in aged bucks. Bacteriospermia in different seasons was not significantly varied; however, nonsignificant increase in microbial load during the rainy season was observed. Overall, the average bacterial load in the semen of Jamunapari, Barbari and Jakhrana bucks was found 540.50 ± 55.88 CFU/ml, 391.81 ± 46.33CFU/ml and 388.93 ± 44.71 CFU/ml respectively. No significant difference in bacterial counts in the subsequent ejaculates among bucks was observed. Moreover, correlation analysis revealed that the proportions of motility, viability, plasma membrane integrity and acrosomal integrity were negatively influenced by the increased bacterial contamination of buck semen.
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Affiliation(s)
- Chetna Gangwar
- Animal Physiology & Reproduction Division, ICAR-Central Institute for Research on Goats (ICAR-CIRG), Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Anil Kumar Mishra
- Animal Health Division, ICAR-CIRG, Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Kumaresan Gururaj
- Animal Health Division, ICAR-CIRG, Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Anshuman Kumar
- Faculty of Veterinary and Animal Sciences, Banaras Hindu University, Mirzapur, Uttar Pradesh, India
| | - Suresh Dinkar Kharche
- Animal Physiology & Reproduction Division, ICAR-Central Institute for Research on Goats (ICAR-CIRG), Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Sonia Saraswat
- Animal Physiology & Reproduction Division, ICAR-Central Institute for Research on Goats (ICAR-CIRG), Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Ravindra Kumar
- Animal Nutrition, Management & Product Technology Division, ICAR-CIRG, Makhdoom, Farah, Mathura, Uttar Pradesh, India
| | - Natesan Ramachandran
- Bioenergetics and Environmental Sciences Division, ICAR-National Institute of Animal Nutrition and Physiology (ICAR-NIANP), Bengaluru, Karnataka, India
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21
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Caldeira JLA, Faria ACS, Diaz-Miranda EA, Zilch TJ, da Costa Caliman SL, Okano DS, Guimarães JD, Pena JL, Barbosa WF, Junior AS, Chang YF, Moreira MAS. Interaction of Mycobacterium avium subsp. paratuberculosis with bovine sperm. Theriogenology 2020; 161:228-236. [PMID: 33340756 DOI: 10.1016/j.theriogenology.2020.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 12/02/2020] [Accepted: 12/05/2020] [Indexed: 11/29/2022]
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is responsible for Paratuberculosis mainly affecting domestic ruminants. The interaction between MAP and sperm and/or germ cells has not yet been established, however the adherence between MAP and the host cell surface is associated to the 85 complex proteins that bind to the host cell's fibronectin. Therefore, this study aimed to evaluate the binding of MAP to bovine sperm and to verify changes in these cells by the presence of MAP before and after sperm cryopreservation. Polyclonal antibodies to MAP 85 complex proteins were produced and utilized in the analyzes. Two Nelore bulls were used for semen collection and MAP dilutions (103-108 CFU/mL) were inoculated in the samples; sperm motility and vigor were evaluated using light microscopy at different times before and after cryopreservation and in the presence and absence of the antibodies 85A and 85B. Interaction of MAP and sperm, interaction of MAP and sperm in the presence of Ab 85A and in the presence of Ab 85B were analyzed by scanning electron microscopy. The viability of MAP after sperm cryopreservation were evaluated by plating the samples after thawing. It was observed that sperm in the presence of MAP shows a decrease in motility and vigor, and that the higher the MAP concentration, the lower the sperm performance. It was possible to determine the viability of MAP after cryopreservation in samples of higher concentrations, which demonstrates the potential of transmission of this pathogen through artificial insemination. The interaction of MAP with bovine sperm occurs mainly in the midpiece and may be linked to the proteins 85A and 85B present in the MAP membrane.
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Affiliation(s)
- Jéssica Lobo Albuquerque Caldeira
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Ana Carolina Silva Faria
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Edgar Andres Diaz-Miranda
- Department of Veterinary, Division of Animal Reproduction, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Tiago Jaquel Zilch
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Sanely Lourenço da Costa Caliman
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Denise Silva Okano
- Department of Veterinary, Division of Animal Reproduction, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - José Domingues Guimarães
- Department of Veterinary, Division of Animal Reproduction, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Junnia Luisa Pena
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Wagner Faria Barbosa
- Department of Statistic, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Abelardo Silva Junior
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil
| | - Yung-Fu Chang
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary, Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Maria Aparecida Scatamburlo Moreira
- Department of Veterinary, Division of Preventive Medicine and Public Health, Universidade Federal de Viçosa, University Campus, PH Rolfs Avenue, 36570-000, Vicosa, Minas Gerais, Brazil.
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22
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Farsimadan M, Motamedifar M. Bacterial infection of the male reproductive system causing infertility. J Reprod Immunol 2020; 142:103183. [PMID: 32853846 DOI: 10.1016/j.jri.2020.103183] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 06/03/2020] [Accepted: 07/29/2020] [Indexed: 12/13/2022]
Abstract
Bacterial infections play a disruptive and hidden role in male reproductive failure. Different kinds of bacteria are often able to interfere with reproductive function in both sexes and lead to infertility. In this study, to further evaluate the role of bacterial infections in male reproduction we provided an extensive overview of so far researches investigating the effects of bacterial infections on male fertility. We searched Medline, PubMed, Scopus and Google scholar databases to identify the potentially relevant studies on bacterial infections and their implications in male infertility. All the bacteria included in this article have negative effects on the male reproductive function; however, there is ample evidence to blame bacteria such as Escherichia coli, Chlamydia trachomatis, Ureaplasma, Mycoplasma and Staphylococcus aureus for reduced fertility and deterioration of sperm parameters. More studies are needed to clarify the molecular mechanisms by which different bacteria exert their detrimental effects on male reproductive system. Getting more insight into probable mechanisms, would significantly facilitate the production of new, advanced, and effective remedies in the future. In view of all evidence, we strongly suggest increasing awareness among people and considering screening programs for patients seeking fertility both to avoid transmission and to improve fertility outcomes among them.
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Affiliation(s)
- Marziye Farsimadan
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
| | - Mohammad Motamedifar
- Department of Bacteriology and Virology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran.
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23
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Henkel R, Offor U, Fisher D. The role of infections and leukocytes in male infertility. Andrologia 2020; 53:e13743. [PMID: 32693434 DOI: 10.1111/and.13743] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 12/16/2022] Open
Abstract
Declining birth rates are one of the problems facing society today. Male counterparts are responsible for about half of the infertility cases, and genitourinary tract infections may play a contributing role in approximately 15% of male infertility cases. Leukocytospermia is an established indicator of infection in the male urogenital tract, although other microorganisms such as bacteria and virus may also be contributors to the etiology of male infertility. The pathophysiology of these infectious agents may be initiated by a local inflammatory reaction resulting in an increase in reactive oxygen species (ROS). This results in testicular injury, thereby affecting sperm morphology, sperm motility, sperm viability and elevation of the seminal leukocyte as a result of the genital tract infection. The infectious and inflammatory changes can result in male infertility. It is proposed that high concentrations of seminal leukocyte and infectious agents may affect sperm function resulting in clumping of motile spermatozoa, decreasing acrosomal functionality and also causing alterations in sperm morphology. However, the literature has poorly clarified the role of infection in male infertility, provoking further debate and research on this topic.
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Affiliation(s)
- Ralf Henkel
- Department of Medical Bioscience, Faculty of Natural Science, University of Western Cape, Bellville, South Africa.,American Center for Reproductive Medicine, Cleveland Clinic, Cleveland, OH, USA
| | - Ugochukwu Offor
- Department of Pre-Clinical Sciences, Faculty of Health Sciences, University of Limpopo, Polokwane, South Africa
| | - David Fisher
- Department of Medical Bioscience, Faculty of Natural Science, University of Western Cape, Bellville, South Africa
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24
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Staphylococcal infections and infertility: mechanisms and management. Mol Cell Biochem 2020; 474:57-72. [PMID: 32691256 DOI: 10.1007/s11010-020-03833-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 07/11/2020] [Indexed: 12/18/2022]
Abstract
Infertility is a subject of worldwide concern as it affects approximately 15% of couples. Among the prime contributors of infertility, urogenital bacterial infections have lately gained much clinical importance. Staphylococcal species are commensal bacteria and major human pathogens mediating an array of reproductive tract infections. Emerging evidences are 'bit by bit' revealing the mechanisms by which Staphylococci strategically disrupt normal reproductive functions. Staphylococcal species can directly or through hematogenous routes can invade the reproductive tissues. In the testicular cells, epididymis as well as in various compartments of female reproductive tracts, the pathogen recognition receptors, toll-like receptors (TLRs), can recognize the pathogen-associated molecular patterns on the Staphylococci and thereby activate inflammatory signalling pathways. These elicit pro-inflammatory mediators trigger other immune cells to infiltrate and release further inflammatory agents and reactive oxygen species (ROS). Adaptive immune responses may intensify the inflammation-induced reproductive tissue damage, particularly via activation of T-helper (Th) cells, Th1 and Th17 by the innate components or by staphylococcal exotoxins. Staphylococcal surface factors binding with sperm membrane proteins can directly impair sperm functions. Although Staphylococci, being one of the most virulent bacterial species, are major contributors in infection-induced infertility in both males and females, the mechanisms of their operations remain under-discussed. The present review aims to provide a comprehensive perception of the possible mechanisms of staphylococcal infection-induced male and female infertility and aid potential interventions to address the lack of competent therapeutic measures for staphylococcal infection-induced infertility.
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25
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Oghbaei H, Rastgar Rezaei Y, Nikanfar S, Zarezadeh R, Sadegi M, Latifi Z, Nouri M, Fattahi A, Ahmadi Y, Bleisinger N. Effects of bacteria on male fertility: Spermatogenesis and sperm function. Life Sci 2020; 256:117891. [PMID: 32504760 DOI: 10.1016/j.lfs.2020.117891] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/24/2020] [Accepted: 05/30/2020] [Indexed: 11/24/2022]
Abstract
Bacterial infection can negatively affect different parts of the male genital tract and subsequently cause impaired spermatogenesis and male fertility. However, most of the previous studies have focused on the infected organs of the male genital tract and there are not many studies that investigated the direct effect of bacteria on sperm and their mechanism of action. Interestingly, bacteria can induce different damages on sperm cells such as DNA fragmentation, cell membrane peroxidation, and acrosome impairment. Such negative effects can be mediated by bacteria-secreted toxins and metabolites or by direct attachment of bacteria on the sperm cells and subsequent activation of signaling pathways related to oxidative stress, apoptosis, and inflammation. These bacteria-induced changes can impair semen parameters and subsequently cause infertility. Given the significant destructive effect of some bacteria on sperm function and male fertility, in this study, we reviewed the impact of male urogenital bacteria on spermatogenesis and sperm functions as well as the underlying mechanisms by which the bacteria can damage sperm.
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Affiliation(s)
- Hajar Oghbaei
- Department of Physiology, Tabriz University of Medical Sciences, Tabriz, Iran; Neurosciences Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yeganeh Rastgar Rezaei
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saba Nikanfar
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Zarezadeh
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammadreza Sadegi
- Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zeinab Latifi
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Nouri
- Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Fattahi
- Women's Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Obstetrics and Gynecology, Erlangen University Hospital, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany.
| | - Yadollah Ahmadi
- Department of Urology, Sina Hospital, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Nathalie Bleisinger
- Department of Obstetrics and Gynecology, Erlangen University Hospital, Friedrich-Alexander University of Erlangen-Nürnberg, Erlangen, Germany
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26
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Belardin L, Camargo M, Intasqui P, Antoniassi M, Fraietta R, Bertolla R. Cysteine‐rich secretory protein 3: inflammation role in adult varicocoele. Andrology 2018; 7:53-61. [DOI: 10.1111/andr.12555] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/03/2018] [Accepted: 09/13/2018] [Indexed: 12/20/2022]
Affiliation(s)
- L. Belardin
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
| | - M. Camargo
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
| | - P. Intasqui
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
| | - M. Antoniassi
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
| | - R. Fraietta
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
| | - R. Bertolla
- Department of Surgery Division of Urology Universidade Federal de São Paulo São Paulo Brazil
- Hospital São Paulo São Paulo Brazil
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27
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28
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Li J, Li B, Song J, Liu H, Bi W, Dong G, Zhou T. Characteristic and mechanism of immobilization effect of Staphylococcus aureus on human spermatozoa. Microb Pathog 2018; 119:28-34. [PMID: 29601868 DOI: 10.1016/j.micpath.2018.03.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 10/17/2022]
Abstract
OBJECTIVE This study was designed to investigate the impacts of Staphylococcus aureus isolated from sperm of male infertility patients, and explore the mechanism of the spermatozoa immobilization attributed to S. aureus. METHODS S. aureus MJ015 and MJ163, the representative strains of immobilization positive and negative group respectively, were obtained from semen of infertile men. Computer-aided sperm analysis (CASA) were performed to measure sperm motility. Transmission electron microscopy (TEM) was utilized to assess morphological alterations of spermatozoa. Two-dimensional gel electrophoresis (2-DE) and liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) were undertaken to analyse the difference between the secretory proteins of MJ015 and MJ163. RESULTS A highly significant decline in motility of spermatozoa after incubating with cultured supernatant of MJ015 by sperm motility measurements, which was not observed when co-cultured with the supernatant of MJ163. TEM illustrated that the culture supernatant of MJ015 contributed to apparently ultrastructural impairment and inhibitory impacts on sperm motility. Various proteins expressed by two samples were identified. Data processing and database search preliminarily establish a link between four differential proteins and spermatozoal immobilization ability. CONCLUSIONS Our data manifested that the clinical isolates of S. aureus have a key role on the motility and morphology of sperm. A better correlation between four identified differentially expressed proteins and the marked decline of the motility of spermatozoa was established.
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Affiliation(s)
- Jiahui Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Bin Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Medical School of Zhejiang University, Hangzhou, 310003, China
| | - Jiangning Song
- Infection and Immunity Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC, 3800, Australia; Monash Centre for Data Science, Faculty of Information Technology, Monash University, Melbourne, VIC, 3800, Australia
| | - Haiyang Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China
| | - Wenzi Bi
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, 325035, China
| | - Guofeng Dong
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, 325035, China
| | - Tieli Zhou
- Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
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29
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Małota K, Student S, Świątek P. Low mitochondrial activity within developing earthworm male germ-line cysts revealed by JC-1. Mitochondrion 2018; 44:111-121. [PMID: 29398303 DOI: 10.1016/j.mito.2018.01.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 01/10/2018] [Accepted: 01/19/2018] [Indexed: 12/19/2022]
Abstract
The male germ-line cysts that occur in annelids appear to be a very convenient model for spermatogenesis studies. Germ-line cysts in the studied earthworm are composed of two compartments: (1) germ cells, where each cell is connected via one intercellular bridge to (2) an anuclear central cytoplasmic mass, the cytophore. In the present paper, confocal and transmission electron microscopy were used to follow the changes in the mitochondrial activity and ultrastructure within the cysts during spermatogenesis. JC-1 was used to visualize the populations of mitochondria with a high and low membrane potential. We used the spot detection Imaris software module to obtain the quantitative data. We counted and compared the 'mitochondrial spots' - the smallest detectable signals from mitochondria. It was found that in all of the stages of cyst development, the majority of mitochondria spots showed a green fluorescence, thus indicating a low mitochondrial membrane potential (MMP). Moreover, the number of active mitochondria spots that were visualized by red JC-1 fluorescence (high MMP) drastically decreased as spermatogenesis progressed. As much as 26% of the total number of mitochondrial spots in the spermatogonial cysts showed a high MMP - 19% in the spermatocytes, 24% in the isodiametric spermatids and 3% and 6%, respectively, in the cysts that were holding early and late elongate spermatids. The mitochondria were usually thread-like and had an electron-dense matrix and lamellar cristae. Then, during spermiogenesis, the mitochondria within both the spermatids and the cytophore had a tendency to form aggregates in which the mitochondria were cemented by an electron-dense material.
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Affiliation(s)
- Karol Małota
- Department of Animal Histology and Embryology, University of Silesia in Katowice, Bankowa 9, 40-007 Katowice, Poland.
| | - Sebastian Student
- Institute of Automatic Control, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland
| | - Piotr Świątek
- Department of Animal Histology and Embryology, University of Silesia in Katowice, Bankowa 9, 40-007 Katowice, Poland
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30
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Mändar R, Punab M, Korrovits P, Türk S, Ausmees K, Lapp E, Preem JK, Oopkaup K, Salumets A, Truu J. Seminal microbiome in men with and without prostatitis. Int J Urol 2017; 24:211-216. [PMID: 28147438 DOI: 10.1111/iju.13286] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 11/27/2016] [Indexed: 01/15/2023]
Abstract
OBJECTIVES To profile the seminal microbiome applying next generation sequencing. METHODS Semen samples of 67 men were involved in the study (21 men with and 46 men without prostatitis). Seminal microbiomes were profiled applying the method that uses combinatorial sequence tags attached to polymerase chain reaction primers that amplify the ribosomal ribonucleic acid V6 region. Amplified polymerase chain reaction products were sequenced using an Illumina paired-end protocol on HiSeq2000 platform. RESULTS The most abundant phylum in semen was Firmicutes, comprising nearly half of the sequences found (median 41.7%, quartiles 28.5-47.2%) followed by Bacteroidetes, Proteobacteria and Actinobacteria. The counts of lactobacilli were higher in healthy men than prostatitis patients (27% [20.2-34.6%] vs 20.2% [4.9-25.0%]; P = 0.05), especially for Lactobacillus iners. Proteobacteria comprised higher proportions in prostatitis patients than healthy men. The species richness was higher in prostatitis patients than healthy men (inverted Simpson index 13.5 ± 5.8 vs 10.3 ± 4.0). CONCLUSIONS The semen of chronic prostatitis patients contains fewer health-supporting lactobacilli, and has higher species diversity than that of healthy men. Firmicutes (especially lactobacilli), Bacteroidetes, Proteobacteria and Actinobacteria comprise the highest proportion of seminal microbiome.
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Affiliation(s)
- Reet Mändar
- Competence Center on Health Technologies, Tartu, Estonia.,Department of Microbiology, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Margus Punab
- Competence Center on Health Technologies, Tartu, Estonia.,Andrology Center, Tartu University Hospital, Tartu, Estonia
| | - Paul Korrovits
- Competence Center on Health Technologies, Tartu, Estonia.,Department of Microbiology, Faculty of Medicine, University of Tartu, Tartu, Estonia.,Andrology Center, Tartu University Hospital, Tartu, Estonia
| | - Silver Türk
- Department of Microbiology, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Kristo Ausmees
- Andrology Center, Tartu University Hospital, Tartu, Estonia.,MediTA Clinic, Tartu, Estonia
| | - Eleri Lapp
- Competence Center on Health Technologies, Tartu, Estonia.,Department of Microbiology, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Jens-Konrad Preem
- Competence Center on Health Technologies, Tartu, Estonia.,Faculty of Science and Technology, University of Tartu, Tartu, Estonia
| | - Kristjan Oopkaup
- Competence Center on Health Technologies, Tartu, Estonia.,Faculty of Science and Technology, University of Tartu, Tartu, Estonia
| | | | - Jaak Truu
- Competence Center on Health Technologies, Tartu, Estonia.,Faculty of Science and Technology, University of Tartu, Tartu, Estonia
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31
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Pinart E, Domènech E, Bussalleu E, Yeste M, Bonet S. A comparative study of the effects of Escherichia coli and Clostridium perfringens upon boar semen preserved in liquid storage. Anim Reprod Sci 2016; 177:65-78. [PMID: 27988080 DOI: 10.1016/j.anireprosci.2016.12.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 11/16/2016] [Accepted: 12/12/2016] [Indexed: 11/18/2022]
Abstract
The present study compares the sperm quality of boar seminal doses artificially inoculated with Escherichia coli and Clostridium perfringens, and maintained in liquid storage at 15°C for a 9-day period. Seminal doses from 10 sexually mature Piétrain boars were diluted in a Beltsville Thawing Solution (BTS)-based extender and infected either with E. coli or C. perfringens, with bacterial loads ranging from 101 to 107cfumL-1. During storage, the changes in sperm quality were determined by assessing pH, sperm viability, sperm motiliy, sperm morphology, sperm agglutination degree, and sperm-bacteria interaction. The infection of seminal doses led to an alkalinization of the medium, which was of higher extend in doses infected with C. perfringens. The effect of contamination on sperm viability and motility relied on bacterial type and load. Therefore, while E. coli was more harmful than C. perfringens in bacterial loads ranging from 101 to 106cfumL-1, the detrimental impact of C. perfringens was more apparent than that of E. coli at a bacterial load of 107cfumL-1. Despite sperm morphology not being affected by either bacterial type or load, sperm agglutination and sperm-bacteria interaction were characteristic of doses infected with E. coli, and increased concomintantly with bacterial load and along storage period. In conclusion, the effects of infection by E. coli on sperm quality were dependent of both bacterial load and storage period, whereas the effects of C. perfringens were mainly dependent on the bacterial load, with a threshold at 107cfumL-1 from which the sperm quality of seminal doses was greatly impaired.
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Affiliation(s)
- Elisabeth Pinart
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, E-17071 Girona, Spain.
| | - Esther Domènech
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, E-17071 Girona, Spain
| | - Eva Bussalleu
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, E-17071 Girona, Spain
| | - Marc Yeste
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, E-17071 Girona, Spain
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, E-17071 Girona, Spain
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Cirkovic I, Bozic DD, Draganic V, Lozo J, Beric T, Kojic M, Arsic B, Garalejic E, Djukic S, Stankovic S. Licheniocin 50.2 and Bacteriocins from Lactococcus lactis subsp. lactis biovar. diacetylactis BGBU1-4 Inhibit Biofilms of Coagulase Negative Staphylococci and Listeria monocytogenes Clinical Isolates. PLoS One 2016; 11:e0167995. [PMID: 27930711 PMCID: PMC5145223 DOI: 10.1371/journal.pone.0167995] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 11/23/2016] [Indexed: 02/07/2023] Open
Abstract
Background Coagulase negative staphylococci (CoNS) and Listeria monocytogenes have important roles in pathogenesis of various genital tract infections and fatal foetomaternal infections, respectively. The aim of our study was to investigate the inhibitory effects of two novel bacteriocins on biofilms of CoNS and L. monocytogenes genital isolates. Methods The effects of licheniocin 50.2 from Bacillus licheniformis VPS50.2 and crude extract of bacteriocins produced by Lactococcus lactis subsp. lactis biovar. diacetylactis BGBU1-4 (BGBU1-4 crude extract) were evaluated on biofilm formation and formed biofilms of eight CoNS (four S. epidermidis, two S. hominis, one S. lugdunensis and one S. haemolyticus) and 12 L. monocytogenes genital isolates. Results Licheniocin 50.2 and BGBU1-4 crude extract inhibited the growth of both CoNS and L. monocytogenes isolates, with MIC values in the range between 200–400 AU/ml for licheniocin 50.2 and 400–3200 AU/ml for BGBU1-4 crude extract. Subinhibitory concentrations (1/2 × and 1/4 × MIC) of licheniocin 50.2 inhibited biofilm formation by all CoNS isolates (p < 0.05, respectively), while BGBU1-4 crude extract inhibited biofilm formation by all L. monocytogenes isolates (p < 0.01 and p < 0.05, respectively). Both bacteriocins in concentrations of 100 AU/mL and 200 AU/mL reduced the amount of 24 h old CoNS and L. monocytogenes biofilms (p < 0.05, p < 0.01, p < 0.001). Conclusions This study suggests that novel bacteriocins have potential to be used for genital application, to prevent biofilm formation and/or to eradicate formed biofilms, and consequently reduce genital and neonatal infections by CoNS and L. monocytogenes.
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Affiliation(s)
- Ivana Cirkovic
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- * E-mail:
| | - Dragana D. Bozic
- Department of Microbiology and Immunology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Veselin Draganic
- Clinic for Gynecology and Obstetrics “Narodni front”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Jelena Lozo
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Tanja Beric
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Milan Kojic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Biljana Arsic
- Clinic for Gynecology and Obstetrics “Narodni front”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Eliana Garalejic
- Clinic for Gynecology and Obstetrics “Narodni front”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Slobodanka Djukic
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Fraczek M, Hryhorowicz M, Gill K, Zarzycka M, Gaczarzewicz D, Jedrzejczak P, Bilinska B, Piasecka M, Kurpisz M. The effect of bacteriospermia and leukocytospermia on conventional and nonconventional semen parameters in healthy young normozoospermic males. J Reprod Immunol 2016; 118:18-27. [DOI: 10.1016/j.jri.2016.08.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 08/12/2016] [Accepted: 08/15/2016] [Indexed: 10/21/2022]
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Michel V, Pilatz A, Hedger MP, Meinhardt A. Epididymitis: revelations at the convergence of clinical and basic sciences. Asian J Androl 2016; 17:756-63. [PMID: 26112484 PMCID: PMC4577585 DOI: 10.4103/1008-682x.155770] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Acute epididymitis represents a common medical condition in the urological outpatient clinic. Mostly, epididymitis is caused by bacterial ascent through the urogenital tract, with pathogens originating either from sexually transmitted diseases or urinary tract infections. Although conservative antimicrobial therapy is possible in the majority of patients and is usually sufficient to eradicate the pathogen, studies have shown persistent oligozoospermia and azoospermia in up to 40% of these patients. Animal models of epididymitis are created to delineate the underlying reasons for this observation and the additional impairment of sperm function that is often associated with the disease. Accumulated data provide evidence of a differential expression of immune cells, immunoregulatory genes and pathogen-sensing molecules along the length of the epididymal duct. The evidence suggests that a tolerogenic environment exists in the caput epididymidis, but that inflammatory responses are most intense toward the cauda epididymidis. This is consistent with the need to provide protection for the neo-antigens of spermatozoa emerging from the testis, without compromising the ability to respond to ascending infections. However, severe inflammatory responses, particularly in the cauda, may lead to collateral damage to the structure and function of the epididymis. Convergence of the clinical observations with appropriate animal studies should lead to better understanding of the immunological environment throughout the epididymis, the parameters underlying susceptibility to epididymitis, and to therapeutic approaches that can mitigate epididymal damage and subsequent fertility problems.
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Affiliation(s)
| | | | | | - Andreas Meinhardt
- Department of Anatomy and Cell Biology; Justus-Liebig-University of Giessen, 35385 Giessen, Germany
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35
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Verze P, Cai T, Lorenzetti S. The role of the prostate in male fertility, health and disease. Nat Rev Urol 2016; 13:379-86. [PMID: 27245504 DOI: 10.1038/nrurol.2016.89] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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36
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Barone F, Ventrella D, Zannoni A, Forni M, Bacci ML. Can Microfiltered Seminal Plasma Preserve the Morphofunctional Characteristics of Porcine Spermatozoa in the Absence of Antibiotics? A Preliminary Study. Reprod Domest Anim 2016; 51:604-10. [PMID: 27174664 DOI: 10.1111/rda.12699] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/07/2016] [Indexed: 11/30/2022]
Abstract
Artificial insemination is extensively performed in pig farms in Europe, the United States and Canada. Antibiotics are typically added to the inseminating dose to limit bacterial growth during liquid phase storage at 16°C, as bacterial contamination is unavoidable. The World Organization for Animal Health (OIE) and the Food and Agriculture Organization (FAO) take action to control and reduce antibiotic use in animals as more bacteria are becoming resistant to antimicrobials. To avoid the use of antibiotics, we prepared inseminating doses using microfiltered seminal plasma (SP). Microfiltration is a common technology used to reduce bacterial contamination but may retain seminal substances, influencing sperm quality during storage. Therefore, the aim of this study was to evaluate the morphofunctional parameters of spermatozoa during storage at 16°C in doses prepared with or without microfiltered SP, with or without the addition of antibiotics, in a Latin square design. Artificial insemination doses with microfiltered SP and without antibiotic addition preserved spermatozoa viability, mitochondrial membrane potential, acrosome integrity and objective motility, with absolute values equal or even better than those observed in conventional doses. In conclusion, although the results could be considered preliminary due to the small sample size, this study suggests that microfiltration of SP can be a simple method, feasible on farms, to replace antibiotic use in extended doses stored in the liquid phase at 16°C for up to 7 days.
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Affiliation(s)
- F Barone
- Department of Veterinary Medical Sciences, DIMEVET, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
| | - D Ventrella
- Department of Veterinary Medical Sciences, DIMEVET, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
| | - A Zannoni
- Department of Veterinary Medical Sciences, DIMEVET, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
| | - M Forni
- Department of Veterinary Medical Sciences, DIMEVET, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
| | - M L Bacci
- Department of Veterinary Medical Sciences, DIMEVET, University of Bologna, Ozzano dell'Emilia, Bologna, Italy
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37
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Sepúlveda L, Bussalleu E, Yeste M, Bonet S. Effect of Pseudomonas aeruginosa on sperm capacitation and protein phosphorylation of boar spermatozoa. Theriogenology 2015; 85:1421-31. [PMID: 26810830 DOI: 10.1016/j.theriogenology.2015.12.025] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 12/21/2015] [Accepted: 12/24/2015] [Indexed: 12/17/2022]
Abstract
Several studies have reported the detrimental effects that bacteriospermia causes on boar sperm quality, but little is known about its effects on IVC. Considering that, the present study sought to evaluate the effects of different concentrations of Pseudomonas aeruginosa on different indicators of capacitation status (sperm viability, membrane lipid disorder, sperm motility kinematics, and protein phosphorylation of boar spermatozoa) after IVC. Flow cytometry and computer assisted sperm analysis (CASA) revealed that the presence of P aeruginosa in boar sperm samples, mostly at concentrations greater than 10(6) CFU/mL, is associated with a significant (P < 0.05) decrease in the percentages of both sperm membrane integrity and sperm with low membrane lipid disorder, and also with a reduction in sperm motility kinetic parameters when compared with results obtained from the control sample, which presented the typical motility pattern of capacitated-like boar spermatozoa. Moreover, Western blot results also showed significant (P < 0.05) changes in the levels of tyrosine, serine, and threonine protein phosphorylation because of bacterial contamination, the decrease in phosphotyrosine levels of p32, a well-known marker of IVC achievement in boar sperm, being the most relevant. Indeed, after 3 hours of IVC, phosphotyrosine levels of p32 in the control sample were 3.13 ± 0.81, whereas in the tubes with 10(6) and 10(8) CFU/mL were 1.05 ± 0.20 and 0.36 ± 0.07, respectively. Therefore, the present study provides novel data regarding the effects of bacterial contamination on boar sperm, suggesting that the presence of P aeruginosa affects the fertilizing ability of boar sperm by altering its ability to accomplish IVC.
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Affiliation(s)
- Lilian Sepúlveda
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain.
| | - Eva Bussalleu
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
| | - Marc Yeste
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Oxford, UK
| | - Sergi Bonet
- Biotechnology of Animal and Human Reproduction (TechnoSperm), Department of Biology, Institute of Food and Agricultural Technology, University of Girona, Girona, Spain
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Mezhoud H, Boyen F, Touazi LH, Garmyn A, Moula N, Smet A, Haesbrouck F, Martel A, Iguer-Ouada M, Touati A. Extended spectrum β-lactamase producing Escherichia coli in broiler breeding roosters: Presence in the reproductive tract and effect on sperm motility. Anim Reprod Sci 2015; 159:205-11. [DOI: 10.1016/j.anireprosci.2015.06.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 06/17/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
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Boguen R, Treulen F, Uribe P, Villegas JV. Ability of Escherichia coli to produce hemolysis leads to a greater pathogenic effect on human sperm. Fertil Steril 2015; 103:1155-61. [DOI: 10.1016/j.fertnstert.2015.01.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 01/26/2015] [Accepted: 01/30/2015] [Indexed: 12/21/2022]
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40
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Fraczek M, Hryhorowicz M, Gaczarzewicz D, Szumala-Kakol A, Kolanowski TJ, Beutin L, Kurpisz M. Can apoptosis and necrosis coexist in ejaculated human spermatozoa during in vitro semen bacterial infection? J Assist Reprod Genet 2015; 32:771-9. [PMID: 25808020 DOI: 10.1007/s10815-015-0462-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/06/2015] [Indexed: 01/23/2023] Open
Abstract
PURPOSE To evaluate whether ejaculated human spermatozoa undergo complete apoptosis or necrosis during experimental semen bacterial infection in vitro. METHODS Apoptotic markers, including mitochondrial transmembrane potential (ΔΨm), phosphatidylserine (PS) externalization, and DNA fragmentation, have been detected simultaneously in ejaculated human sperm after their incubation with a known pathogenic (Escherichia coli), as well as with conditionally pathogenic bacterial strains (Staphylococcus haemolyticus, Bacteroides ureolyticus) and/or leukocytes. The ΔΨm and translocation of PS was evaluated using the JC-1 and Annexin V binding tests, respectively. A modified TUNEL assay with additional staining for sperm viability was used to detect the DNA fragmentation level. RESULTS The exposure of ejaculated spermatozoa to bacterial strains was associated with a simultaneous decrease in the percentage of sperm with normal ΔΨm and an increase in the proportion of Annexin V-positive sperm. Additionally, in the presence of S. haemolyticus, B. ureolyticus and/or leukocytes, a significant increase in the percentage of live TUNEL-positive (apoptotic) as well as dead TUNEL-positive (necrotic) sperm cells was also observed. CONCLUSIONS The cellular death observed in spermatozoa in the presence of inflammatory mediators may be due to both apoptosis and necrosis. Here, we demonstrate for the first time that direct contact of conditionally pathogenic bacteria with ejaculated human sperm may play an even greater role in the promotion of apoptosis than in case of some pathogenic bacterial strains. These findings suggest that significant bacteriospermia and leukocytospermia may be direct causes of subfertility or additional negative factors worsening the prognosis of fertility in natural and assisted procreation.
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Affiliation(s)
- Monika Fraczek
- Department of Reproductive Biology and Stem Cells, Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-685, Poznan, Poland
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Effects of different concentrations of Pseudomonas aeruginosa on boar sperm quality. Anim Reprod Sci 2014; 150:96-106. [PMID: 25255782 DOI: 10.1016/j.anireprosci.2014.09.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/01/2014] [Accepted: 09/03/2014] [Indexed: 11/24/2022]
Abstract
Bacteriospermia in boar ejaculates is a frequent finding that compromises the sperm quality and, consequently, causes economic losses in swine industry. The present study sought to evaluate the effect of different concentrations of Pseudomonas aeruginosa on boar sperm quality over a storing period of 11 days at 15-17 ° C. Ten commercial seminal doses coming from post-pubertal and healthy boars were artificially inoculated with different infective concentrations of P. aeruginosa, ranging from 2 × 10(8) to 2 × 10(4)cfu/mL. Negative controls were non-inoculated doses. Sperm quality, assessed as sperm motility (CASA), sperm viability, acrosome integrity and pH, as well as the bacterial growth, were checked after 0, 1, 2, 4, 7, 9 and 11 days of storage at 15-17 ° C. Results obtained showed significant decreases in the percentages of total and progressive sperm motility, sperm viability and acrosome integrity in the greatest infective concentrations (2 × 10(7) and 2 × 10(8)cfu/mL), when compared to the negative control. In contrast, there was no effect on seminal pH throughout the experiment. Results indicate the presence of P. aeruginosa in boar semen, apart from being a potential source for the spread of infectious diseases and harmful impact on sows, negatively affects the longevity and fertilizing ability of boar sperm when present in high concentrations. Thus, P. aeruginosa causes deleterious effects on boar sperm quality during liquid storage at 15-17 ° C, thus strict hygienic measures must be implemented in boar studs to minimize bacterial concentration of semen doses.
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42
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Fraczek M, Wiland E, Piasecka M, Boksa M, Gaczarzewicz D, Szumala-Kakol A, Kolanowski T, Beutin L, Kurpisz M. Fertilizing potential of ejaculated human spermatozoa during in vitro semen bacterial infection. Fertil Steril 2014; 102:711-719.e1. [DOI: 10.1016/j.fertnstert.2014.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 06/03/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022]
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43
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Piasecka M, Fraczek M, Gaczarzewicz D, Gill K, Szumala-Kakol A, Kazienko A, Laszczynska M, Lenart S, Beutin L, Kurpisz M. Novel Morphological Findings of Human Sperm Removal by Leukocytes inIn VivoandIn VitroConditions: Preliminary Study. Am J Reprod Immunol 2014; 72:348-58. [DOI: 10.1111/aji.12284] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 05/31/2014] [Indexed: 12/25/2022] Open
Affiliation(s)
- Malgorzata Piasecka
- Department of Histology and Developmental Biology; Pomeranian Medical University; Szczecin Poland
| | - Monika Fraczek
- Department of Reproductive Biology and Stem Cells; Institute of Human Genetics; Polish Academy of Sciences; Poznan Poland
| | - Dariusz Gaczarzewicz
- Department of Animal Reproduction, Biotechnology and Environmental Hygiene; West Pomeranian University of Technology; Szczecin Poland
| | - Kamil Gill
- Department of Histology and Developmental Biology; Pomeranian Medical University; Szczecin Poland
| | | | - Anna Kazienko
- Department of Histology and Developmental Biology; Pomeranian Medical University; Szczecin Poland
| | - Maria Laszczynska
- Department of Histology and Developmental Biology; Pomeranian Medical University; Szczecin Poland
| | - Stanislaw Lenart
- Institute of Materials Engineering; West Pomeranian University of Technology; Szczecin Poland
| | - Lothar Beutin
- Department of Biological Safety; Federal Institute for Risk Assessment (BfR); Berlin Germany
| | - Maciej Kurpisz
- Department of Reproductive Biology and Stem Cells; Institute of Human Genetics; Polish Academy of Sciences; Poznan Poland
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Barbonetti A, Vassallo MRC, Cinque B, Filipponi S, Mastromarino P, Cifone MG, Francavilla S, Francavilla F. Soluble products of Escherichia coli induce mitochondrial dysfunction-related sperm membrane lipid peroxidation which is prevented by lactobacilli. PLoS One 2013; 8:e83136. [PMID: 24358256 PMCID: PMC3865092 DOI: 10.1371/journal.pone.0083136] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Accepted: 10/31/2013] [Indexed: 11/19/2022] Open
Abstract
Unidentified soluble factors secreted by E. coli, a frequently isolated microorganism in genitourinary infections, have been reported to inhibit mitochondrial membrane potential (ΔΨm), motility and vitality of human spermatozoa. Here we explore the mechanisms involved in the adverse impact of E. coli on sperm motility, focusing mainly on sperm mitochondrial function and possible membrane damage induced by mitochondrial-generated reactive oxygen species (ROS). Furthermore, as lactobacilli, which dominate the vaginal ecosystem of healthy women, have been shown to exert anti-oxidant protective effects on spermatozoa, we also evaluated whether soluble products from these microorganisms could protect spermatozoa against the effects of E. coli. We assessed motility (by computer-aided semen analysis), ΔΨm (with JC-1 dye by flow cytometry), mitochondrial ROS generation (with MitoSOX red dye by flow cytometry) and membrane lipid-peroxidation (with the fluorophore BODIPY C11 by flow cytometry) of sperm suspensions exposed to E. coli in the presence and in the absence of a combination of 3 selected strains of lactobacilli (L. brevis, L. salivarius, L. plantarum). A Transwell system was used to avoid direct contact between spermatozoa and microorganisms. Soluble products of E. coli induced ΔΨm loss, mitochondrial generation of ROS and membrane lipid-peroxidation, resulting in motility loss. Soluble factors of lactobacilli prevented membrane lipid-peroxidation of E. coli-exposed spermatozoa, thus preserving their motility. In conclusion, sperm motility loss by soluble products of E. coli reflects a mitochondrial dysfunction-related membrane lipid-peroxidation. Lactobacilli could protect spermatozoa in the presence of vaginal disorders, by preventing ROS-induced membrane damage.
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Affiliation(s)
- Arcangelo Barbonetti
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
- San Raffaele Sulmona Institute, Sulmona, Italy
| | | | - Benedetta Cinque
- Immunopathology Laboratory, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
| | - Silvia Filipponi
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
| | | | - Maria Grazia Cifone
- Immunopathology Laboratory, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
| | - Sandro Francavilla
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
| | - Felice Francavilla
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L’Aquila, L’Aquila, Italy
- * E-mail:
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McNamara KB, van Lieshout E, Simmons LW. Females suffer a reduction in the viability of stored sperm following an immune challenge. J Evol Biol 2013; 27:133-40. [PMID: 24251540 DOI: 10.1111/jeb.12278] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 10/16/2013] [Indexed: 01/20/2023]
Abstract
Despite the ubiquitous nature of sperm storage in invertebrates, relatively little is known about its costs, or the impact that immune activation can have on a female's ability to maintain viable sperm stores. We explored the effects of an immune challenge on sperm storage under food-limited and ad libitum conditions in the field cricket, Teleogryllus oceanicus, by injecting mated adult females with either a LD5 dose of live bacteria or a nonpathogenic immune elicitor [lipopolysaccharide (LPS)] and then scoring the viability of their stored sperm. Females that were infected with bacteria showed a reduction in the viability of stored sperm 48 h after infection; interestingly, this pattern was not evident when females were injected with LPS. Reduction in sperm viability post-infection may reflect a reproductive trade-off between immune function and sperm store maintenance, as only females injected with bacteria showed an elevated antibacterial immune (lytic) response. Alternatively, bacteria may act directly on sperm quality. Dietary manipulations showed that lytic activity in females is condition dependent, irrespective of their immune challenge treatment. Diet affected the ability of females to maintain the viability of stored sperm, suggesting that sperm storage is condition dependent. That bacterial infection associated with a reduction in stored sperm quality has potentially important implications for the outcomes of sperm competition in T. oceanicus and in other species in which females store sperm between matings.
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Affiliation(s)
- K B McNamara
- Centre for Evolutionary Biology, School of Animal Biology (M092), The University of Western Australia, Crawley, Australia
| | - E van Lieshout
- Centre for Evolutionary Biology, School of Animal Biology (M092), The University of Western Australia, Crawley, Australia
| | - L W Simmons
- Centre for Evolutionary Biology, School of Animal Biology (M092), The University of Western Australia, Crawley, Australia
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46
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In vitro reconstruction of inflammatory reaction in human semen: effect on sperm DNA fragmentation. J Reprod Immunol 2013; 100:76-85. [DOI: 10.1016/j.jri.2013.09.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Alshahrani S, McGill J, Agarwal A. Prostatitis and male infertility. J Reprod Immunol 2013; 100:30-6. [DOI: 10.1016/j.jri.2013.05.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 05/06/2013] [Accepted: 05/09/2013] [Indexed: 12/17/2022]
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Oxidative stress, spermatozoa and leukocytic infiltration: relationships forged by the opposing forces of microbial invasion and the search for perfection. J Reprod Immunol 2013; 100:11-9. [DOI: 10.1016/j.jri.2013.06.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 06/10/2013] [Accepted: 06/26/2013] [Indexed: 11/22/2022]
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Boguen R, Uribe P, Treulen F, Villegas JV. Distinct isolates of uropathogenicEscherichia colidifferentially affect human sperm parametersin vitro. Andrologia 2013; 46:943-7. [DOI: 10.1111/and.12167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2013] [Indexed: 11/29/2022] Open
Affiliation(s)
- R. Boguen
- Centre of Reproductive Biotechnology (BIOREN-CEBIOR); University of La Frontera; Temuco Chile
| | - P. Uribe
- Centre of Reproductive Biotechnology (BIOREN-CEBIOR); University of La Frontera; Temuco Chile
| | - F. Treulen
- Centre of Reproductive Biotechnology (BIOREN-CEBIOR); University of La Frontera; Temuco Chile
| | - J. V. Villegas
- Centre of Reproductive Biotechnology (BIOREN-CEBIOR); University of La Frontera; Temuco Chile
- Department of Internal Medicine; Faculty of Medicine; University of La Frontera; Temuco Chile
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Bullman S, Lucid A, Corcoran D, Sleator RD, Lucey B. Genomic investigation into strain heterogeneity and pathogenic potential of the emerging gastrointestinal pathogen Campylobacter ureolyticus. PLoS One 2013; 8:e71515. [PMID: 24023611 PMCID: PMC3758288 DOI: 10.1371/journal.pone.0071515] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 07/01/2013] [Indexed: 12/29/2022] Open
Abstract
The recent detection and isolation of C. ureolyticus from patients with diarrhoeal illness and inflammatory bowel diseases warrants further investigation into its role as an emerging pathogen of the human gastrointestinal tract. Regarding the pathogenic mechanisms employed by this species we provide the first whole genome analysis of two C. ureolyticus isolates including the type strain. Comparative analysis, subtractive hybridisation and gene ontology searches against other Campylobacter species identifies the high degree of heterogenicity between C. ureolyticus isolates, in addition to the identification of 106 putative virulence associated factors, 52 of which are predicted to be secreted. Such factors encompass each of the known virulence tactics of pathogenic Campylobacter spp. including adhesion and colonisation (CadF, PEB1, IcmF and FlpA), invasion (ciaB and 16 virB-virD4 genes) and toxin production (S-layer RTX and ZOT). Herein, we provide the first virulence catalogue for C. ureolyticus, the components of which theoretically provide this emerging species with sufficient arsenal to establish pathology.
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Affiliation(s)
- Susan Bullman
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
| | - Alan Lucid
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
| | - Daniel Corcoran
- Department of Medical Microbiology, Cork University Hospital, Cork, Ireland
| | - Roy D. Sleator
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
- * E-mail:
| | - Brigid Lucey
- Department of Biological Sciences, Cork Institute of Technology, Cork, Ireland
- Department of Medical Microbiology, Cork University Hospital, Cork, Ireland
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