1
|
Exogenous gonadotropin-releasing hormone counteracts the adverse effect of scrotal insulation on testicular functions in bucks. Sci Rep 2022; 12:7869. [PMID: 35551262 PMCID: PMC9098548 DOI: 10.1038/s41598-022-11884-4] [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: 01/03/2022] [Accepted: 04/29/2022] [Indexed: 11/08/2022] Open
Abstract
This study determined the effects of scrotal insulation on testicular functions in bucks and evaluated the impact of exogenous gonadotropin-releasing hormone (GnRH) administration before scrotal insulation on sperm production and testicular vascular dynamics. Twelve bucks were randomly divided into three groups: scrotal-insulated animals without GnRH treatment (INS), scrotal-insulated animals treated previously with GnRH (GnRH + INS), and animals without insulation as controls (CON). Doppler ultrasonography was used to evaluate testicular vascular changes, and semen samples were collected to assess seminal parameters. Testicular samples were collected from slaughtered bucks at the end of the experiment for histological investigations and immunohistochemical analysis for caspase 3 (apoptotic marker), and a vascular endothelial growth factor (VEGF; hypoxic marker) evaluation. Sperm motility drastically decreased (33%) in the INS group on day 8 compared with those in the GnRH + INS and CON groups (58% and 85%, respectively). Testicular blood flow significantly decreased for 3 and 2 weeks in the INS and GnRH + INS groups, respectively. The pulsatility index (PI) reached pretreatment values at 5 and 4 weeks after insulation in the INS and GnRH + INS groups, respectively. The resistance index (RI) values increased in both insulated groups for the first 2 weeks and decreased to control values 4 weeks after insulation. However, the maximum velocity (VP) started to increase reaching pretreatment values by the 5th and 3rd weeks after insulation in the INS and GnRH + INS groups, respectively. Histological investigations showed a marked reduction in lipid inclusions in Sertoli cells in the GnRH + INS group compared with those in the INS group. The distributions of both caspase 3 and VEGF decreased in the GnRH + INS group compared with those in the INS group. This study showed that the administration of a single dose of GnRH delayed the negative effects of scrotal insulation on different seminal traits and revealed the pivotal role of GnRH in compensating testicular insulation in bucks.
Collapse
|
2
|
Wang K, Hu H, Cui W, Zhang X, Tang Q, Liu N, Lan X, Pan C. Palliative effects of metformin on testicular damage induced by triptolide in male rats. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 222:112536. [PMID: 34303043 DOI: 10.1016/j.ecoenv.2021.112536] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
As a widely existing traditional Chinese medicine component, TP (triptolide) has serious reproductive toxicity which causes severe damage to the reproductive system and limits its application prospect. TP and MET (metformin) have shown great potential in combined with each other in anticancer and anti-inflammatory. Whether metformin can resist the reproductive toxicity caused by triptolide, the effects of MET on TP-induced reproductive capacity has not been reported. In this study, metformin was used to investigate the therapeutic effect on reproductive toxicity induced by TP in rat. The results showed that metformin had significant therapeutic effects on oxidative stress damage, destruction of the blood-testosterone barrier and apoptosis. And it proved that its therapeutic effect is mainly to restore the structural and functional stability of testis through antioxidant stress. It will provide guidance for the treatment of reproductive toxicity caused by TP and the adjuvant detoxification of TP application.
Collapse
Affiliation(s)
- Ke Wang
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China.
| | - Huina Hu
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China.
| | - Wenbo Cui
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China.
| | - Xuelian Zhang
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China
| | - Qi Tang
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China
| | - Nuan Liu
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China
| | - Xianyong Lan
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China
| | - Chuanying Pan
- College of Animal Science and Technology, Northwest A&F University, Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, Key Laboratory of Animal Biotechnology, Ministry of Agriculture, No. 22 Xinong Road, Yangling, Shaanxi 712100, PR China.
| |
Collapse
|
3
|
Diaz-Jimenez M, Wang M, Wang W, Isachenko E, Rahimi G, Kumar P, Mallmann P, von Brandenstein M, Hidalgo M, Isachenko V. Cryo-banking of human spermatozoa by aseptic cryoprotectants-free vitrification in liquid air: Positive effect of elevated warming temperature. Cell Tissue Bank 2021; 23:17-29. [PMID: 33608835 DOI: 10.1007/s10561-021-09904-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 02/01/2021] [Indexed: 11/24/2022]
Abstract
Cryoprotectant-free vitrification is a common method for spermatozoa cryopreservation by direct plunging into liquid nitrogen. However, the commercial liquid nitrogen could be potentially contaminated by microorganisms. Warming temperature plays an essential role for quality of human spermatozoa after vitrification. This study aimed to evaluate comparatively a quality spermatozoa after vitrification in liquid nitrogen and clean liquid air as well as with two warming rates: at 42 °C and 45 °C. After performing of routine swim-up of normozoospermia samples, spermatozoa from the same ejaculate were divided into two groups: vitrified in liquid nitrogen (LN) and sterile liquid air (LA). Spermatozoa of LN group were warmed at 42 °C, and spermatozoa of LA groups were divided and warmed at 42 °C (LA42) and 45 °C (LA45). Then spermatozoa motility, reactive oxygen species (ROS), mitochondrial membrane potential (MMP), reactive nitrogen species (RNS), and viability were assessed. It was no found significant differences in quality of spermatozoa from LN and LA groups in the motility, ROS, MMP, RNS rates after warming at 42 °C. A tendency to obtain better spermatozoa quality was found with using of warming by 42 °C in comparison with 45 °C. It was concluded that cryoprotectant-free vitrification by direct dropping of human spermatozoa into clean liquid air can be used as an alternative to cooling in liquid nitrogen. Warming of spermatozoa at 42 °C allows to preserve the spermatozoa physiological parameters.
Collapse
Affiliation(s)
- Maria Diaz-Jimenez
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany.,Veterinary Reproduction Group, Department of Animal Medicine Surgery, University of Cordoba, 14071, Cordoba, Spain
| | - Mengying Wang
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Wanxue Wang
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Evgenia Isachenko
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Gohar Rahimi
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Pradeep Kumar
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Peter Mallmann
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Melanie von Brandenstein
- University Clinic for Urology and Urological Oncology, Medical Faculty, Cologne University, 50931, Cologne, Germany
| | - Manuel Hidalgo
- Veterinary Reproduction Group, Department of Animal Medicine Surgery, University of Cordoba, 14071, Cordoba, Spain
| | - Vladimir Isachenko
- Department of Obstetrics and Gynaecology, Medical Faculty, Cologne University, 50931, Cologne, Germany.
| |
Collapse
|
4
|
Hasani A, Khosravi A, Rahimi K, Afshar A, Fadaei-Fathabadi F, Raoofi A, Raee P, Aghajanpour F, Aliaghaei A, Abdi S, Norouzian M, Abdollahifar MA. Photobiomodulation restores spermatogenesis in the transient scrotal hyperthermia-induced mice. Life Sci 2020; 254:117767. [DOI: 10.1016/j.lfs.2020.117767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 01/18/2023]
|
5
|
Archana SS, Selvaraju S, Binsila BK, Arangasamy A, Krawetz SA. Immune regulatory molecules as modifiers of semen and fertility: A review. Mol Reprod Dev 2019; 86:1485-1504. [DOI: 10.1002/mrd.23263] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 08/22/2019] [Indexed: 12/16/2022]
Affiliation(s)
- S. Siddalingappa Archana
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
- Department of BiochemistryJain University Bengaluru India
| | - Sellappan Selvaraju
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - B. Krishnan Binsila
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - Arunachalam Arangasamy
- Reproductive Physiology Laboratory, Animal Physiology DivisionICAR‐National Institute of Animal Nutrition and Physiology Bengaluru India
| | - Stephen A. Krawetz
- Department of Obstetrics and GynecologyWayne State University School of Medicine Detroit Michigan
- Center for Molecular Medicine and GeneticsC.S. Mott Center for Human Growth and Development, Wayne State University School of Medicine Detroit Michigan
| |
Collapse
|
6
|
Murphy EM, O' Meara C, Eivers B, Lonergan P, Fair S. Optimizing storage temperature of liquid bovine semen diluted in INRA96. J Dairy Sci 2018; 101:5549-5558. [PMID: 29550136 DOI: 10.3168/jds.2017-14205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 02/06/2018] [Indexed: 11/19/2022]
Abstract
Temperature regulation of liquid bovine semen can be difficult in field situations. Two experiments were carried out to assess the effect of storage temperature on in vitro sperm characteristics and 60-d nonreturn rate (NRR) following artificial insemination (AI) of liquid bovine semen. In experiment 1, the effect of storage of liquid bovine semen in INRA96 diluent (IMV Technologies, L'Aigle, France) at 1 of 5 storage temperatures (5, 15, or 28°C, and fluctuating between 5 and 15°C or 5 and 28°C) on total and progressive motility and kinematic parameters was assessed objectively via computer-assisted sperm analyzer on d 0, 1, 2, 3, and 4 after collection. Fluctuating temperatures were designed to mimic day- to nighttime variation. In experiment 2, we assessed the field fertility of liquid semen stored at a constant 5 or 15°C or in an unregulated manner and compared with that of frozen-thawed semen (total of n = 106,738 inseminations). In experiment 1, we detected a linear decrease in motility with increased duration of storage. Semen stored at a constant 15°C or fluctuating between 5 and 15°C had greater total motility than semen held at 5 or 28°C or fluctuating between 5 and 28°C; however, semen stored at 15°C and fluctuating between 5 and 15°C did not differ from each other. Semen held at a constant 5 or 15°C or fluctuating between 5 and 15°C, although not differing from each other, had higher progressive motility scores than that held at 28°C or fluctuating between 5 and 28°C. Semen stored at a constant 28°C exhibited poor motility and velocity values but had high progressive motion values compared with that all other storage temperatures; however, the other storage temperatures did not differ from each other in relation to motility kinematics. In experiment 2, semen stored at a constant 5°C resulted in a lower 60-d NRR (62.5%) than storage at constant 15°C or unregulated temperature or frozen-thawed semen (73.6, 74.6, and 74.4%, respectively. In conclusion, sperm stored in IRNA96 are quite tolerant in terms of storage temperature, retaining acceptable motility between 5 and 15°C. Storing semen at a constant 15°C resulted in greater in vitro sperm motility and higher NRR rates than storage at 5°C and did not differ in NRR from frozen-thawed semen or semen stored at an unregulated temperature; however, lower storage temperatures were shown to be more detrimental to sperm in vivo than unregulated storage conditions.
Collapse
Affiliation(s)
- Edel M Murphy
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland; National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Ciara O' Meara
- National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Bernard Eivers
- National Cattle Breeding Centre, Naas, Co. Kildare, W91 WF59, Ireland
| | - Patrick Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, D04 N2E5, Ireland
| | - Sean Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland.
| |
Collapse
|
7
|
Murphy EM, Eivers B, O'Meara CM, Lonergan P, Fair S. Effect of storage temperature, nitrogen gassing and sperm concentration on the in vitro semen quality and in vivo fertility of liquid bull semen stored in INRA96. Theriogenology 2017; 108:223-228. [PMID: 29253665 DOI: 10.1016/j.theriogenology.2017.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/27/2017] [Accepted: 12/02/2017] [Indexed: 10/18/2022]
Abstract
The aim of this study was to assess the effect of storage temperature, nitrogen (N2) gassing and sperm concentration on in vitro characteristics and calving rate (CR) following artificial insemination (AI) of liquid bull semen stored in INRA96. In Experiment 1 the effect of liquid bull semen diluted in either N2 bubbled or non-bubbled INRA96 at a concentration of 5 × 106 sperm per 0.25 mL insemination dose and stored at 5 or 15 °C was assessed subjectively for total and progressive motility on Days 0, 1, 2, 3 and 4 post collection. In Experiment 2a, the effect of stored liquid semen at three sperm concentrations (3, 4 or 5 × 106 sperm per 0.25 mL insemination dose) on total and progressive motility was assessed subjectively on Days 0, 1 and 2 post collection. In Experiment 2b, the field fertility of liquid semen stored at ambient temperature at a concentration of 3, 4 or 5 × 106 sperm per 0.25 mL dose and inseminated on Days 1 or 2 post collection was assessed in comparison to frozen-thawed semen (total of n = 5742). In Experiment 1, total and progressive motility decreased with increased duration of storage (P < 0.01); however, there was no effect of N2 bubbling on motility on Days 0, 1, 2, 3 and 4 of storage. There was an effect of temperature on total and progressive motility, regardless of treatment, as semen stored at 15°C recorded higher motility values than semen stored at 5°C (P < 0.01). In Experiment 2a, there was no effect of sperm concentration on total or progressive motility on Days 0, 1 or 2 of storage. There was a linear decrease in motility with increased duration of storage (P < 0.01); however, there was no sperm concentration by day interaction. In Experiment 2b, there was an effect of sperm concentration on CR (P < 0.01); semen diluted to 3 and 4 × 106 sperm per dose resulted in a lower CR after 2 days of storage (41.1 and 44.7%, respectively) in comparison to frozen-thawed semen (55.2%) but did not differ to CR of semen diluted to 5 × 106 sperm per dose on Day 2 of storage. There was an effect of parity, fertility sub-index and days in milk (DIM) at AI on CR (P < 0.01). In conclusion, N2 bubbling and sperm concentration had no effect on in vitro sperm motility of liquid semen, but this study demonstrated a reduction in CR on Day 2 of storage at lower sperm concentrations in comparison to frozen-thawed semen.
Collapse
Affiliation(s)
- E M Murphy
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland; National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - B Eivers
- National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - C M O'Meara
- National Cattle Breeding Centre, Naas, Co Kildare, W91 WF59, Ireland
| | - P Lonergan
- School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, D04 N2E5, Ireland
| | - S Fair
- Laboratory of Animal Reproduction, Department of Biological Sciences, School of Natural Sciences, Faculty of Science and Engineering, University of Limerick, Limerick, V94 T9PX, Ireland.
| |
Collapse
|
8
|
Gao S, Li C, Chen L, Zhou X. Actions and mechanisms of reactive oxygen species and antioxidative system in semen. Mol Cell Toxicol 2017. [DOI: 10.1007/s13273-017-0015-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
9
|
Borowiec AS, Sion B, Chalmel F, D Rolland A, Lemonnier L, De Clerck T, Bokhobza A, Derouiche S, Dewailly E, Slomianny C, Mauduit C, Benahmed M, Roudbaraki M, Jégou B, Prevarskaya N, Bidaux G. Cold/menthol TRPM8 receptors initiate the cold-shock response and protect germ cells from cold-shock-induced oxidation. FASEB J 2016; 30:3155-70. [PMID: 27317670 PMCID: PMC5001517 DOI: 10.1096/fj.201600257r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 05/23/2016] [Indexed: 12/21/2022]
Abstract
Testes of most male mammals present the particularity of being externalized from the body and are consequently slightly cooler than core body temperature (4-8°C below). Although, hypothermia of the testis is known to increase germ cells apoptosis, little is known about the underlying molecular mechanisms, including cold sensors, transduction pathways, and apoptosis triggers. In this study, using a functional knockout mouse model of the cold and menthol receptors, dubbed transient receptor potential melastatine 8 (TRPM8) channels, we found that TRPM8 initiated the cold-shock response by differentially modulating cold- and heat-shock proteins. Besides, apoptosis of germ cells increased in proportion to the cooling level in control mice but was independent of temperature in knockout mice. We also observed that the rate of germ cell death correlated positively with the reactive oxygen species level and negatively with the expression of the detoxifying enzymes. This result suggests that the TRPM8 sensor is a key determinant of germ cell fate under hypothermic stimulation.-Borowiec, A.-S., Sion, B., Chalmel, F., Rolland, A. D., Lemonnier, L., De Clerck, T., Bokhobza, A., Derouiche, S., Dewailly, E., Slomianny, C., Mauduit, C., Benahmed, M., Roudbaraki, M., Jégou, B., Prevarskaya, N., Bidaux, G. Cold/menthol TRPM8 receptors initiate the cold-shock response and protect germ cells from cold-shock-induced oxidation.
Collapse
Affiliation(s)
| | - Benoit Sion
- Pharmacologie Fondamentale et Clinique de la Douleur, INSERM, U1107, Neuro-Dol, Clermont Université, Université d'Auvergne, Clermont-Ferrand, France
| | | | | | - Loïc Lemonnier
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Tatiana De Clerck
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Alexandre Bokhobza
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Sandra Derouiche
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Etienne Dewailly
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Christian Slomianny
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Claire Mauduit
- Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, INSERM, U1065, Nice, France; and
| | - Mohamed Benahmed
- Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, INSERM, U1065, Nice, France; and
| | - Morad Roudbaraki
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Bernard Jégou
- INSERM, U1085-Irset, Campus de Beaulieu, Rennes, France
| | - Natalia Prevarskaya
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France
| | - Gabriel Bidaux
- Physiologie Cellulaire (PHYCEL), INSERM, U1003, Université Lille, Lille, France; Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), UMR8523, Biophotonic Team, Villeneuve d'Ascq, France
| |
Collapse
|
10
|
Paillamanque J, Madrid C, Carmona EM, Osses N, Moreno RD, Oresti GM, Pino JA, Reyes JG. Effects of Fatty Acids on Intracellular [Ca2+], Mitochondrial Uncoupling and Apoptosis in Rat Pachytene Spermatocytes and Round Spermatids. PLoS One 2016; 11:e0158518. [PMID: 27428262 PMCID: PMC4948913 DOI: 10.1371/journal.pone.0158518] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 06/16/2016] [Indexed: 12/30/2022] Open
Abstract
The aim of this work was to explore the ability of free arachidonic acid, palmitic acid and the unsaturated fatty acids oleic acid and docosahexaenoic acid to modify calcium homeostasis and mitochondrial function in rat pachytene spermatocytes and round spermatids. In contrast to palmitic acid, unsaturated fatty acids produced significant increases in intracellular calcium concentrations ([Ca2+]i) in both cell types. Increases were fatty acid specific, dose-dependent and different for each cell type. The arachidonic acid effects on [Ca2+]i were higher in spermatids than in spermatocytes and persisted when residual extracellular Ca2+ was chelated by EGTA, indicating that the increase in [Ca2+]i originated from release of intracellular calcium stores. At the concentrations required for these increases, unsaturated fatty acids produced no significant changes in the plasma membrane potential of or non-specific permeability in spermatogenic cells. For the case of arachidonic acid, the [Ca2+]i increases were not caused by its metabolic conversion to eicosanoids or anandamide; thus we attribute this effect to the fatty acid itself. As estimated with fluorescent probes, unsaturated fatty acids did not affect the intracellular pH but were able to induce a progressive decrease in the mitochondrial membrane potential. The association of this decrease with reduced reactive oxygen species (ROS) production strongly suggests that unsaturated fatty acids induced mitochondrial uncoupling. This effect was stronger in spermatids than in spermatocytes. As a late event, arachidonic acid induced caspase 3 activation in a dose-dependent manner both in the absence and presence of external Ca2+. The concurrent but differential effects of unsaturated fatty acids on [Ca2+]i and mitochondrial functions are additional manifestations of the metabolic changes that germ cells undergo during their differentiation.
Collapse
Affiliation(s)
- Joaquín Paillamanque
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Cristian Madrid
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Emerson M Carmona
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Nelson Osses
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Ricardo D Moreno
- Departamento de Fisiología, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Gerardo M Oresti
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Bahia Blanca, Argentina
| | - José A Pino
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Juan G Reyes
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| |
Collapse
|
11
|
Ayarza E, González M, López F, Fernández-Donoso R, Page J, Berrios S. Alterations in chromosomal synapses and DNA repair in apoptotic spermatocytes of Mus m. domesticus. Eur J Histochem 2016; 60:2677. [PMID: 27349323 PMCID: PMC4933834 DOI: 10.4081/ejh.2016.2677] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 05/29/2016] [Accepted: 06/01/2016] [Indexed: 11/23/2022] Open
Abstract
We investigated whether apoptotic spermatocytes from the mouse Mus m. domesticus presented alterations in chromosomal synapses and DNA repair. To enrich for apoptotic spermatocytes, the scrotum's temperature was raised by partially exposing animals for 15 min to a 42ºC water bath. Spermatocytes in initial apoptosis were identified in situ by detecting activated Caspase-9. SYCP1 and SYCP3 were markers for evaluating synapses or the structure of synaptonemal complexes and Rad51 and γH2AX for detecting DNA repair and chromatin remodeling. Apoptotic spermatocytes were concentrated in spermatogenic cycle stages III-IV (50.3%), XI-XII (44.1%) and IX-X (4.2%). Among apoptotic spermatocytes, 48% were in middle pachytene, 44% in metaphase and 6% in diplotene. Moreover, apoptotic spermatocytes showed several structural anomalies in autosomal bivalents, including splitting of chromosomal axes and partial asynapses between homologous chromosomes. gH2AX and Rad51 were atypically distributed during pachytene and as late as diplotene and associated with asynaptic chromatin, single chromosome axes or discontinuous chromosome axes. Among apoptotic spermatocytes at pachytene, 70% showed changes in the structure of synapses, 67% showed changes in gH2AX and Rad51 distribution and 50% shared alterations in both synapses and DNA repair. Our results showed that apoptotic spermatocytes from Mus m. domesticus contain a high frequency of alterations in chromosomal synapses and in the recruitment and distribution of DNA repair proteins. Together, these observations suggest that these alterations may have been detected by meiotic checkpoints triggering apoptosis.
Collapse
|
12
|
Rao M, Zhao XL, Yang J, Hu SF, Lei H, Xia W, Zhu CH. Effect of transient scrotal hyperthermia on sperm parameters, seminal plasma biochemical markers, and oxidative stress in men. Asian J Androl 2015; 17:668-75. [PMID: 25652627 PMCID: PMC4492061 DOI: 10.4103/1008-682x.146967] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/04/2014] [Accepted: 09/29/2014] [Indexed: 11/30/2022] Open
Abstract
In this experimental prospective study, we aimed to analyze the effect of transient scrotal hyperthermia on the male reproductive organs, from the perspective of sperm parameters, semen plasma biochemical markers, and oxidative stress, to evaluate whether different frequencies of heat exposure cause different degrees of damage to spermatogenesis. Two groups of volunteers (10 per group) received testicular warming in a 43°C water bath 10 times, for 30 min each time: group 1: 10 consecutive days; group 2: once every 3 days. Sperm parameters, epididymis and accessory sex gland function, semen plasma oxidative stress and serum sex hormones were tested before treatment and in the 16-week recovery period after treatment. At last, we found an obvious reversible decrease in sperm concentration (P = 0.005 for Group 1 and P= 0.008 for Group 2 when the minimums were compared with baseline levels, the same below), motility (P = 0.009 and 0.021, respectively), the hypoosmotic swelling test score (P = 0.007 and 0.008, respectively), total acrosin activity (P = 0.018 and 0.009, respectively), and an increase in the seminal plasma malondialdehyde concentration (P = 0.005 and 0.017, respectively). The decrease of sperm concentration was greater for Group 2 than for Group 1 (P = 0.031). We concluded that transient scrotal hyperthermia seriously, but reversibly, negatively affected the spermatogenesis, oxidative stress may be involved in this process. In addition, intermittent heat exposure more seriously suppresses the spermatogenesis compared to consecutive heat exposure. This may be indicative for clinical infertility etiology analysis and the design of contraceptive methods based on heat stress.
Collapse
Affiliation(s)
- Meng Rao
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Ling Zhao
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yang
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shi-Fu Hu
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Lei
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Xia
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chang-Hong Zhu
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
13
|
Murphy C, Holden SA, Murphy EM, Cromie AR, Lonergan P, Fair S. The impact of storage temperature and sperm number on the fertility of liquid-stored bull semen. Reprod Fertil Dev 2015; 28:RD14369. [PMID: 25739711 DOI: 10.1071/rd14369] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 01/15/2015] [Indexed: 02/28/2024] Open
Abstract
In Ireland, liquid bull semen is stored at unregulated ambient temperatures, typically at 5×106 spermatozoa per dose, and inseminated within 2.5 days of collection. In Experiment 1, the effect of storage temperature (5, 15, 22, 32°C and fluctuations (Flux) between these temperatures) on progressive motility, viability, acrosomal status, DNA fragmentation and osmotic resistance was assessed. In Experiment 2, the field fertility of liquid semen at 5, 4 and 3×106 spermatozoa per dose, up to Day 2 after collection, was assessed in comparison to frozen-thawed semen at 20×106 spermatozoa per dose (n=35328 inseminations). In Experiment 1, storage at 15°C resulted in the highest progressive motility (PP6 spermatozoa per dose on Day 2 of storage was reduced in comparison to frozen-thawed semen (P<0.01). In conclusion, liquid semen is versatile between storage temperatures of 5 and 22°C, but demonstrates reduced fertility on Day 2 of storage at lower sperm numbers in comparison to frozen-thawed semen.
Collapse
|
14
|
Liang Y, Dong Y, Zhao J, Li W. YES1 activation elicited by heat stress is anti-apoptotic in mouse pachytene spermatocytes. Biol Reprod 2013; 89:131. [PMID: 24132961 DOI: 10.1095/biolreprod.113.112235] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Deregulated expression of protein tyrosine phosphorylation has been implicated in testicular response to different stimuli. Herein, YES1, a nonreceptor protein tyrosine kinase, was found to be significantly up-regulated in pachytene spermatocytes (PS) during early recovery from a transient testicular heat stress. Coculture of PS with Sertoli cells (SCs) could enhance the hyperthermia-induced YES1 activation, indicative of a positive regulation of the paracrine signaling. Moreover, SU6656, a selective YES1 inhibitor, was shown to effectively block YES1 activity, thereafter resulting in a dramatic increase of heat stress-induced apoptosis in primary cultured PS. Mechanistically, the antiapoptotic effect of YES1 activation in response to testicular heat insult may mediate via the regulation of extracellular signal-regulated kinase (ERK)/metastasis-associated 1 (MTA1) cascade. From a clinical standpoint, a notably higher level of YES1 expression was observed in the pathological testis from varicocele patients as compared to a negligible staining in the control group. Taken together, our present results provide the first evidence that the YES1/ERK/MTA1/p53 cascade may serve as a naturally occurring, indispensable self-defensive mechanism maintaining apoptotic balance during meiotic heat stress. Our study may have also partially answered the question of how activation of signal pathways at the cell membrane surface interacts with the key regulatory events occurring in the nucleus during testicular heat shock.
Collapse
Affiliation(s)
- Yuan Liang
- Department of Pathology and Pathophysiology, Fourth Military Medical University, Xi'an, People's Republic of China
| | | | | | | |
Collapse
|