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Tian Y, Chen X, Pu J, Liang Y, Li W, Xu X, Tan X, Yu S, Shao T, Ma Y, Wang B, Chen Y, Li Y. Spermatogenic cell-specific type 1 hexokinase (HK1S) is essential for capacitation-associated increase in tyrosine phosphorylation and male fertility in mice. PLoS Genet 2024; 20:e1011357. [PMID: 39074078 DOI: 10.1371/journal.pgen.1011357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 06/27/2024] [Indexed: 07/31/2024] Open
Abstract
Hexokinase (HK) catalyzes the first irreversible rate-limiting step in glycolysis that converts glucose to glucose-6-phosphate. HK1 is ubiquitously expressed in the brain, erythrocytes, and other tissues where glycolysis serves as the major source of ATP production. Spermatogenic cell-specific type 1 hexokinase (HK1S) is expressed in sperm but its physiological role in male mice is still unknown. In this study, we generate Hk1s knockout mice using the CRISPR/Cas9 system to study the gene function in vivo. Hk1s mRNA is exclusively expressed in testes starting from postnatal day 18 and continuing to adulthood. HK1S protein is specifically localized in the outer surface of the sperm fibrous sheath (FS). Depletion of Hk1s leads to infertility in male mice and reduces sperm glycolytic pathway activity, yet they have normal motile parameters and ATP levels. In addition, by using in vitro fertilization (IVF), Hk1s deficient sperms are unable to fertilize cumulus-intact or cumulus-free oocytes, but can normally fertilize zona pellucida-free oocytes. Moreover, Hk1s deficiency impairs sperm migration into the oviduct, reduces acrosome reaction, and prevents capacitation-associated increases in tyrosine phosphorylation, which are probable causes of infertility. Taken together, our results reveal that HK1S plays a critical role in sperm function and male fertility in mice.
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Affiliation(s)
- Yingchao Tian
- The School of Public Health, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiu Chen
- Department of Pharmacy, Heze University, Heze, Shandong, China
| | - Jie Pu
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yuxin Liang
- The School of Public Health, Xinxiang Medical University, Xinxiang, Henan, China
| | - Weixi Li
- The School of Public Health, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiaotong Xu
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Xinshui Tan
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Shuntai Yu
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Tianyu Shao
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Yan Ma
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Bingwei Wang
- Department of Pharmacology, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yongjie Chen
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, China
| | - Yushan Li
- The School of Public Health, Xinxiang Medical University, Xinxiang, Henan, China
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2
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Brisard BM, Cashwell KD, Stewart SM, Harrison LM, Charles AC, Dennis CV, Henslee IR, Carrow EL, Belcher HA, Bhowmick D, Vos P, Bier M, Hart DM, Schmidt CA. "Modeling Diffusive Search by Non-Adaptive Sperm: Empirical and Computational Insights". BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.17.599386. [PMID: 38948799 PMCID: PMC11212867 DOI: 10.1101/2024.06.17.599386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
During fertilization, mammalian sperm undergo a winnowing selection process that reduces the candidate pool of potential fertilizers from ~106-1011 cells to 101-102 cells (depending on the species). Classical sperm competition theory addresses the positive or 'stabilizing' selection that acts on sperm phenotypes within populations of organisms but does not strictly address the developmental consequences of sperm traits among individual organisms that are under purifying selection during fertilization. It is the latter that is of utmost concern for improving assisted reproductive technologies (ART) because 'low fitness' sperm may be inadvertently used for fertilization during interventions that rely heavily on artificial sperm selection, such as intracytoplasmic sperm injection (ICSI). Importantly, some form of sperm selection is used in nearly all forms of ART (e.g., differential centrifugation, swim-up, or hyaluronan binding assays, etc.). To date, there is no unifying quantitative framework (i.e., theory of sperm selection) that synthesizes causal mechanisms of selection with observed natural variation in individual sperm traits. In this report, we reframe the physiological function of sperm as a collective diffusive search process and develop multi-scale computational models to explore the causal dynamics that constrain sperm 'fitness' during fertilization. Several experimentally useful concepts are developed, including a probabilistic measure of sperm 'fitness' as well as an information theoretic measure of the magnitude of sperm selection, each of which are assessed under systematic increases in microenvironmental selective pressure acting on sperm motility patterns.
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Affiliation(s)
| | | | | | | | | | | | - Ivie R. Henslee
- Department of Biology, East Carolina University, Greenville NC
| | - Ethan L. Carrow
- Department of Biology, East Carolina University, Greenville NC
| | - Heather A. Belcher
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University
| | - Debajit Bhowmick
- Flow Cytometry Core Facility, Brody School of Medicine, East Carolina University
| | - Paul Vos
- Department of Public Health, East Carolina University, Greenville NC
| | - Martin Bier
- Department of Physics, East Carolina University, Greenville NC
| | - David M. Hart
- Department of Computer Science, East Carolina University, Greenville, NC
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3
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Cui X, Cai X, Zhang F, Zhang W, Liu H, Mu S, Guo S, Wan H, Zhang H, Zhang Z, Kang X. Comparative Proteomics Elucidates the Potential Mechanism of Sperm Capacitation of Chinese Mitten Crabs ( Eriocheir sinensis). J Proteome Res 2024; 23:1603-1614. [PMID: 38557073 DOI: 10.1021/acs.jproteome.3c00711] [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] [Indexed: 04/04/2024]
Abstract
Sperm capacitation is broadly defined as a suite of biochemical and biophysical changes resulting from the acquisition of fertilization ability. To gain insights into the regulation mechanism of crustacean sperm capacitation, 4D label-free quantitative proteomics was first applied to analyze the changes of sperm in Eriocheir sinensis under three sequential physiological conditions: seminal vesicles (X2), hatched with the seminal receptacle content (X3), and incubated with egg water (X5). In total, 1536 proteins were identified, among which 880 proteins were quantified, with 82 and 224 proteins significantly altered after incubation with the seminal receptacle contents and egg water. Most differentially expressed proteins were attributed to biological processes by Gene Ontology annotation analysis. As the fundamental bioenergetic metabolism of sperm, the oxidative phosphorylation, glycolysis, and the pentose phosphate pathway presented significant changes under the treatment of seminal receptacle contents, indicating intensive regulation for sperm in the seminal receptacle. Additionally, the seminal receptacle contents also significantly increased the oxidation level of sperm, whereas the enhancement of abundance in superoxide dismutase, peroxiredoxin 1, and glutathione S-transferase after incubation with egg water significantly improved the resistance against oxidation. These results provided a new perspective for reproduction studies in crustaceans.
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Affiliation(s)
- Xiaodong Cui
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Xueqian Cai
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Fenghao Zhang
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Weiwei Zhang
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Huan Liu
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Shumei Mu
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Shuai Guo
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Haifu Wan
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Han Zhang
- College of Life Sciences, Hebei University, Baoding 071000, China
| | - Zhaohui Zhang
- Department of Reproductive Medicine, Baoding First Central Hospital, Baoding 071000, China
| | - Xianjiang Kang
- College of Life Sciences, Hebei University, Baoding 071000, China
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4
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Schmidt CA, Hale BJ, Bhowmick D, Miller WJ, Neufer PD, Geyer CB. Pyruvate modulation of redox potential controls mouse sperm motility. Dev Cell 2024; 59:79-90.e6. [PMID: 38101411 PMCID: PMC10872278 DOI: 10.1016/j.devcel.2023.11.011] [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: 08/05/2022] [Revised: 06/21/2023] [Accepted: 11/13/2023] [Indexed: 12/17/2023]
Abstract
Sperm gain fertilization competence in the female reproductive tract through a series of biochemical changes and a requisite switch from linear progressive to hyperactive motility. Despite being essential for fertilization, regulation of sperm energy transduction is poorly understood. This knowledge gap confounds interpretation of interspecies variation and limits progress in optimizing sperm selection for assisted reproduction. Here, we developed a model of mouse sperm bioenergetics using metabolic phenotyping data, quantitative microscopy, and spectral flow cytometry. The results define a mechanism of motility regulation by microenvironmental pyruvate. Rather than being consumed as a mitochondrial fuel source, pyruvate stimulates hyperactivation by repressing lactate oxidation and activating glycolysis in the flagellum through provision of nicotinamide adenine dinucleotide (NAD)+. These findings provide evidence that the transitions in motility requisite for sperm competence are governed by changes in the metabolic microenvironment, highlighting the unexplored potential of using catabolite combination to optimize sperm selection for fertilization.
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Affiliation(s)
- Cameron A Schmidt
- Department of Biology at East Carolina University, Greenville, NC 27858, USA; East Carolina Diabetes and Obesity Institute at East Carolina University, Greenville, NC 27834, USA.
| | - Benjamin J Hale
- East Carolina Diabetes and Obesity Institute at East Carolina University, Greenville, NC 27834, USA; Department of Anatomy and Cell Biology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
| | - Debajit Bhowmick
- Flow Cytometry Core Facility, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
| | - William J Miller
- Department of Engineering, East Carolina University, Greenville, NC 27834, USA
| | - P Darrell Neufer
- East Carolina Diabetes and Obesity Institute at East Carolina University, Greenville, NC 27834, USA; Department of Physiology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA
| | - Christopher B Geyer
- East Carolina Diabetes and Obesity Institute at East Carolina University, Greenville, NC 27834, USA; Department of Anatomy and Cell Biology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA.
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5
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Al Noman MA, Cuellar RAD, Kyzer JL, Chung SSW, Cheryala N, Holth TAD, Maitra S, Naqvi T, Wong HL, Schönbrunn E, Hawkinson JE, Wolgemuth DJ, Georg GI. Strategies for developing retinoic acid receptor alpha-selective antagonists as novel agents for male contraception. Eur J Med Chem 2023; 261:115821. [PMID: 37776573 PMCID: PMC10841505 DOI: 10.1016/j.ejmech.2023.115821] [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: 07/23/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 10/02/2023]
Abstract
Reported here are the synthesis and in vitro evaluation of a series of 26 retinoic acid analogs based on dihydronaphthalene and chromene scaffolds using a transactivation assay. Chromene amide analog 21 was the most potent and selective retinoic acid receptor α antagonist identified from this series. In vitro evaluation indicated that 21 has favorable physicochemical properties and a favorable pharmacokinetic PK profile in vivo with significant oral bioavailability, metabolic stability, and testes exposure. Compound 21 was evaluated for its effects on spermatogenesis and disruption of fertility in a mouse model. Oral administration of compound 21 at low doses showed reproducibly characteristic albeit modest effects on spermatogenesis, but no effects on fertility were observed in mating studies. The inhibition of spermatogenesis could not be enhanced by raising the dose and lengthening the duration of dosing. Thus, 21 may not be a good candidate to pursue further for effects on male fertility.
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Affiliation(s)
- Md Abdullah Al Noman
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Rebecca A D Cuellar
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Jillian L Kyzer
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | | | - Narsihmulu Cheryala
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Trinh A D Holth
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Soma Maitra
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Tahmina Naqvi
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Henry L Wong
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Ernst Schönbrunn
- Department of Drug Discovery, Moffitt Cancer Center, 12902 USF Magnolia Drive, Tampa, FL, 33612, USA
| | - Jon E Hawkinson
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA
| | - Debra J Wolgemuth
- Department of Genetics and Development, USA; Department of Obstetrics and Gynecology, USA; The Institute of Human Nutrition, USA; The Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, 1150 St. Nicholas Avenue, New York, NY, 10032, USA
| | - Gunda I Georg
- Department of Medicinal Chemistry and Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, 717 Delaware Street SE, Minneapolis, MN, 55414, USA.
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6
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Kyzer JL, Noman MAA, Cuellar RAD, Chung SSW, Maitra S, Naqvi T, Hawkinson JE, Wolgemuth DJ, Georg GI. Investigation of selective retinoic acid receptor alpha antagonist ER-50891 and related analogs for male contraception. Arch Pharm (Weinheim) 2023; 356:e2300031. [PMID: 37154197 DOI: 10.1002/ardp.202300031] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 05/10/2023]
Abstract
Retinoic acid receptor alpha (RARα) antagonist ER-50891 and 15 analogs were prepared and tested in vitro for potency and selectivity at RARα, RARβ, and RARγ using transactivation assays. Minor modifications to the parent molecule such as the introduction of a C4 tolyl group in place of the C4 phenyl group on the quinoline moiety slightly increased the RARα selectivity but larger substituents significantly decreased the potency. Replacement of the pyrrole moiety of ER-50891 with triazole, amides, or a double bond produced inactive compounds. ER-50891 was found to be stable in male mouse liver microsomes and was tested in male mice to assess its effects on spermatogenesis. Characteristic, albeit modest and transient, effects on spermatogenesis were observed.
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Affiliation(s)
- Jillian L Kyzer
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Md Abdullah Al Noman
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Rebecca A D Cuellar
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Sanny S W Chung
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
| | - Soma Maitra
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Tahmina Naqvi
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jon E Hawkinson
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Debra J Wolgemuth
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
- Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, New York, USA
- The Institute of Human Nutrition, Columbia University Medical Center, New York, New York, USA
- The Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, USA
| | - Gunda I Georg
- Department of Medicinal Chemistry, Institute for Therapeutics Discovery and Development, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
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7
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Balbach M, Ghanem L, Violante S, Kyaw A, Romarowski A, Cross JR, Visconti PE, Levin LR, Buck J. Capacitation induces changes in metabolic pathways supporting motility of epididymal and ejaculated sperm. Front Cell Dev Biol 2023; 11:1160154. [PMID: 37440924 PMCID: PMC10335746 DOI: 10.3389/fcell.2023.1160154] [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: 02/06/2023] [Accepted: 06/12/2023] [Indexed: 07/15/2023] Open
Abstract
Mammalian sperm require sufficient energy to support motility and capacitation for successful fertilization. Previous studies cataloging the changes to metabolism in sperm explored ejaculated human sperm or dormant mouse sperm surgically extracted from the cauda epididymis. Due to the differences in methods of collection, it remains unclear whether any observed differences between mouse and human sperm represent species differences or reflect the distinct maturation states of the sperm under study. Here we compare the metabolic changes during capacitation of epididymal versus ejaculated mouse sperm and relate these changes to ejaculated human sperm. Using extracellular flux analysis and targeted metabolic profiling, we show that capacitation-induced changes lead to increased flux through both glycolysis and oxidative phosphorylation in mouse and human sperm. Ejaculation leads to greater flexibility in the ability to use different carbon sources. While epididymal sperm are dependent upon glucose, ejaculated mouse and human sperm gain the ability to also leverage non-glycolytic energy sources such as pyruvate and citrate.
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Affiliation(s)
- Melanie Balbach
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, United States
| | - Lubna Ghanem
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, United States
| | - Sara Violante
- Donald B. and Catherine C. Marron Cancer Metabolism Center, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Aye Kyaw
- Donald B. and Catherine C. Marron Cancer Metabolism Center, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Ana Romarowski
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, MA, United States
| | - Justin R. Cross
- Donald B. and Catherine C. Marron Cancer Metabolism Center, Memorial Sloan Kettering Cancer Center, New York, NY, United States
| | - Pablo E. Visconti
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, MA, United States
| | - Lonny R. Levin
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, United States
| | - Jochen Buck
- Department of Pharmacology, Weill Cornell Medicine, New York, NY, United States
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8
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Inhibition of Mitochondrial Uncoupling Proteins Arrests Human Spermatozoa Motility without Compromising Viability. Antioxidants (Basel) 2023; 12:antiox12020409. [PMID: 36829970 PMCID: PMC9952840 DOI: 10.3390/antiox12020409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Mitochondrial uncoupling proteins (UCPs) are central in the regulation of mitochondrial activity and reactive oxygen species (ROS) production. High oxidative stress is a major cause of male infertility; however, UCPs expression and function in human spermatozoa are still unknown. Herein, we aimed to assess the expression and function of the different homologs (UCP1-6) in human spermatozoa. For this purpose, we screened for the mRNA expression of all UCP homologs. Protein expression and immunolocalization of UCP1, UCP2, and UCP3 were also assessed. Highly motile spermatozoa were isolated from human normozoospermic seminal samples (n = 16) and incubated with genipin, an inhibitor of UCPs (0, 0.5, 5, and 50 µM) for 3 h at 37 °C. Viability and total motility were assessed. Mitochondrial membrane potential and ROS production were evaluated. Media were collected and the metabolic profile and antioxidant potential were analyzed by 1H-NMR and FRAP, respectively. The expression of all UCP homologs (UCP1-6) mRNA by human spermatozoa is herein reported for the first time. UCP1-3 are predominant at the head equatorial segment, whereas UCP1 and UCP2 are also expressed at the spermatozoa midpiece, where mitochondria are located. The inhibition of UCPs by 50 µM genipin, resulting in the UCP3 inhibition, did not compromise sperm cell viability but resulted in irreversible total motility loss that persisted despite washing or incubation with theophylline, a cAMP activator. These effects were associated with decreased mitochondrial membrane potential and lactate production. No differences concerning UCP3 expression, however, were observed in spermatozoa from normozoospermic versus asthenozoospermic men (n = 6). The inhibition of UCPs did not increase ROS production, possibly due to the decreased mitochondrial activity and genipin antioxidant properties. In sum, UCPs are major regulators of human spermatozoa motility and metabolism. The discovery and characterization of UCPs' role in human spermatozoa can shed new light on spermatozoa ROS-related pathways and bioenergetics physiology.
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Tourmente M, Sansegundo E, Rial E, Roldan ERS. Bioenergetic changes in response to sperm capacitation and two-way metabolic compensation in a new murine model. Cell Mol Life Sci 2023; 80:11. [PMID: 36534181 PMCID: PMC9763147 DOI: 10.1007/s00018-022-04652-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/29/2022] [Accepted: 11/24/2022] [Indexed: 12/23/2022]
Abstract
The acquisition of fertilizing ability by mammalian spermatozoa, known as "capacitation," includes processes that depend on particular metabolic pathways. This has led to the hypothesis that ATP demands might differ between capacitated and non-capacitated cells. Mouse sperm can produce ATP via OXPHOS and aerobic glycolysis, an advantageous characteristic considering that these cells have to function in the complex and variable environment of the female reproductive tract. Nonetheless, despite evidence showing that both metabolic pathways play a role in events associated with mouse sperm capacitation, there is contradictory evidence regarding changes promoted by capacitation in this species. In addition, the vast majority of studies regarding murine sperm metabolism use Mus musculus laboratory strains as model, thus neglecting the wide diversity of sperm traits of other species of Mus. Focus on closely related species with distinct evolutionary histories, which may be the result of different selective pressures, could shed light on diversity of metabolic processes. Here, we analyzed variations in sperm bioenergetics associated with capacitation in spermatozoa of the steppe mouse, Mus spicilegus, a species with high sperm performance. Furthermore, we compared sperm metabolic traits of this species with similar traits previously characterized in M. musculus. We found that the metabolism of M. spicilegus sperm responded to capacitation in a manner similar to that of M. musculus sperm. However, M. spicilegus sperm showed distinct metabolic features, including the ability to perform cross-pathway metabolic compensation in response to either respiratory or glycolytic inhibition, thus revealing a delicate fine-tuning of its metabolic capacities.
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Affiliation(s)
- Maximiliano Tourmente
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain.
- Centro de Biología Celular y Molecular, Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN - UNC), Universidad Nacional de Córdoba, Córdoba, Argentina.
- Instituto de Investigaciones Biológicas y Tecnológicas, Consejo Nacional de Investigaciones Científicas y Técnicas (IIByT - CONICET, UNC), Córdoba, Argentina.
| | - Ester Sansegundo
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Eduardo Rial
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas, CSIC, Madrid, Spain
| | - Eduardo R S Roldan
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain.
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10
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Sanchez-Rodriguez A, Sansegundo E, Tourmente M, Roldan ERS. Effect of High Viscosity on Energy Metabolism and Kinematics of Spermatozoa from Three Mouse Species Incubated under Capacitating Conditions. Int J Mol Sci 2022; 23:ijms232315247. [PMID: 36499575 PMCID: PMC9737050 DOI: 10.3390/ijms232315247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/24/2022] [Accepted: 11/28/2022] [Indexed: 12/07/2022] Open
Abstract
In order to sustain motility and prepare for fertilization, sperm require energy. The characterization of sperm ATP production and usage in mouse species revealed substantial differences in metabolic pathways that can be differentially affected by capacitation. Moreover, spermatozoa encounter different environments with varying viscoelastic properties in the female reproductive tract. Here, we examine whether viscosity affects sperm ATP levels and kinematics during capacitation in vitro. Sperm from three mouse species (Mus musculus, M. spretus, M. spicilegus) were incubated under capacitating conditions in a modified Tyrode's medium containing bicarbonate, glucose, pyruvate, lactate, and bovine serum albumin (mT-BH) or in a bicarbonate-free medium as a non-capacitating control. Viscosity was increased with the inclusion of polyvinylpyrrolidone. ATP was measured with a bioluminescence kit, and kinematics were examined with a computer-aided sperm analysis system. In M. musculus sperm, ATP declined during capacitation, but no differences were found between non-capacitating and capacitating sperm. In contrast, in M. spretus and M. spicilegus, ATP levels decreased in capacitating sperm. Increasing viscosity in the medium did not modify the timing or proportion of cells undergoing capacitation but did result in additional time- and concentration-dependent decreases in ATP in M. spretus and M. spicilegus under capacitating conditions. Additionally, increased viscosity altered both velocity and trajectory descriptors. The limited impact of capacitation and higher viscosity on M. musculus sperm ATP and kinematics could be related to the low intensity of postcopulatory sexual selection in this species. Responses seen in the other two species could be linked to the ability of their sperm to perform better under enhanced selective pressures.
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Affiliation(s)
- Ana Sanchez-Rodriguez
- Departmento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), 28006 Madrid, Spain
| | - Ester Sansegundo
- Departmento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), 28006 Madrid, Spain
| | - Maximiliano Tourmente
- Departmento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), 28006 Madrid, Spain
- Centro de Biología Celular y Molecular, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba (FCEFyN—UNC), Córdoba X5016GCA, Argentina
- Instituto de Investigaciones Biológicas y Tecnológicas, Consejo Nacional de Investigaciones Científicas y Técnicas (IIByT—CONICET, UNC), Córdoba X5016GCA, Argentina
| | - Eduardo R. S. Roldan
- Departmento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), 28006 Madrid, Spain
- Correspondence:
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11
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Molecular mechanisms regulating spermatogenesis in vertebrates: Environmental, metabolic, and epigenetic factor effects. Anim Reprod Sci 2022; 246:106896. [PMID: 34893378 DOI: 10.1016/j.anireprosci.2021.106896] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 12/14/2022]
Abstract
The renewal of the natural resources is one of the most concerning aspects of modern farming. In animal production, there are many barriers breeders and researchers have to overcome to develop new practices to improve reproductive potential and hasten sexual maturation of the commercially viable species, while maintaining meat quality and sustainability. With the utilization of molecular biology techniques, there have been relevant advances in the knowledge of spermatogenesis, especially in mammals, resulting in new possibilities to control male fertility and the selection of desirable characteristics. Most of these discoveries have not been implemented in animal production. In this review, recent studies are highlighted on the molecular pathways involved in spermatogenesis in the context of animal production. There is also exploration of the interaction between environmental factors and spermatogenesis and how this knowledge may revolutionize animal production techniques. Furthermore, new insights are described about the inheritance of desired characteristics in mammals and there is a review of nefarious actions of pollutants, nutrition, and metabolism on reproductive potential in subsequent generations. Even though there are these advances in knowledge base, results from recent studies indicate there are previously unrecognized environmental effects on spermatogenesis. The molecular mechanisms underlying this interaction are not well understood. Research in spermatogenesis, therefore, remains pivotal as a pillar of animal production sustainability.
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12
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Ribeiro JC, Nogueira-Ferreira R, Amado F, Alves MG, Ferreira R, Oliveira PF. Exploring the Role of Oxidative Stress in Sperm Motility: A Proteomic Network Approach. Antioxid Redox Signal 2022; 37:501-520. [PMID: 34847748 DOI: 10.1089/ars.2021.0241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Significance: Infertility is a major global health problem, with nearly half of the cases being associated with male factors. Although reactive oxygen species (ROS) are crucial for sperm cell normal physiological processes, an imbalance between ROS production and antioxidants can lead to oxidative stress that can impair sperm function. Indeed, high semen ROS levels are reported in 30%-80% of infertile men. Recent Advances: Male oxidative stress infertility is an uprising classification for idiopathic infertility. Proteomic approaches, including quantitative mass spectrometry (MS)-based proteomics, are being utilized to explore the molecular mechanisms associated with oxidative stress in male infertility. Critical Issues: In this review, proteome data were collected from articles available on PubMed centered on MS-based proteomic studies, performed in seminal plasma and sperm cell samples, and enrolling men with impaired semen parameters. The bioinformatic analysis of proteome data with Cytoscape (ClueGO+CluePedia) and STRING tools allowed the identification of the biological processes more prevalent in asthenozoospermia, with focus on the ones related to oxidative stress. Future Directions: The identification of the antioxidant proteins in seminal plasma and sperm cells that can protect sperm cells from oxidative stress is crucial not only for a better understanding of the molecular mechanisms associated with male infertility but specially to guide new therapeutic possibilities. Antioxid. Redox Signal. 37, 501-520.
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Affiliation(s)
- João C Ribeiro
- Department of Anatomy and Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Rita Nogueira-Ferreira
- Department of Anatomy and Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Francisco Amado
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Marco G Alves
- Department of Anatomy and Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Rita Ferreira
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Pedro F Oliveira
- QOPNA & LAQV, Department of Chemistry, University of Aveiro, Aveiro, Portugal
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13
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Tourmente M, Sansegundo E, Rial E, Roldan ERS. Capacitation promotes a shift in energy metabolism in murine sperm. Front Cell Dev Biol 2022; 10:950979. [PMID: 36081906 PMCID: PMC9445201 DOI: 10.3389/fcell.2022.950979] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
In mammals, sperm acquire fertilization ability after a series of physiological and biochemical changes, collectively known as capacitation, that occur inside the female reproductive tract. In addition to other requirements, sperm bioenergetic metabolism has been identified as a fundamental component in the acquisition of capacitation. Mammalian sperm produce ATP through two main metabolic processes, oxidative phosphorylation (OXPHOS) and aerobic glycolysis that are localized to two different flagellar compartments, the midpiece, and the principal piece, respectively. In mouse sperm, the occurrence of many events associated with capacitation relies on the activity of these two energy-producing pathways, leading to the hypothesis that some of these events may impose changes in sperm energetic demands. In the present study, we used extracellular flux analysis to evaluate changes in glycolytic and respiratory parameters of murine sperm that occur as a consequence of capacitation. Furthermore, we examined whether these variations affect sperm ATP sustainability. Our results show that capacitation promotes a shift in the usage ratio of the two main metabolic pathways, from oxidative to glycolytic. However, this metabolic rewiring does not seem to affect the rate at which the sperm consume ATP. We conclude that the probable function of the metabolic switch is to increase the ATP supply in the distal flagellar regions, thus sustaining the energetic demands that arise from capacitation.
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Affiliation(s)
- Maximiliano Tourmente
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
- Centro de Biología Celular y Molecular, Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN—UNC), Universidad Nacional de Córdoba, Córdoba, Argentina
- Instituto de Investigaciones Biológicas y Tecnológicas, Consejo Nacional de Investigaciones Científicas y Técnicas (IIByT—CONICET, UNC), Córdoba, Argentina
- *Correspondence: Maximiliano Tourmente, ; Eduardo R. S. Roldan,
| | - Ester Sansegundo
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | - Eduardo Rial
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas, CSIC, Madrid, Spain
| | - Eduardo R. S. Roldan
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
- *Correspondence: Maximiliano Tourmente, ; Eduardo R. S. Roldan,
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14
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Wang H, Dou Q, Jeong KJ, Choi J, Gladyshev VN, Chung JJ. Redox regulation by TXNRD3 during epididymal maturation underlies capacitation-associated mitochondrial activity and sperm motility in mice. J Biol Chem 2022; 298:102077. [PMID: 35643315 PMCID: PMC9218152 DOI: 10.1016/j.jbc.2022.102077] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 05/03/2022] [Accepted: 05/04/2022] [Indexed: 10/26/2022] Open
Abstract
During epididymal transit, redox remodeling protects mammalian spermatozoa, preparing them for survival in the subsequent journey to fertilization. However, molecular mechanisms of redox regulation in sperm development and maturation remain largely elusive. In this study, we report that thioredoxin-glutathione reductase (TXNRD3), a thioredoxin reductase family member particularly abundant in elongating spermatids at the site of mitochondrial sheath formation, regulates redox homeostasis to support male fertility. Using Txnrd3-/- mice, our biochemical, ultrastructural, and live cell imaging analyses revealed impairments in sperm morphology and motility under conditions of TXNRD3 deficiency. We find that mitochondria develop more defined cristae during capacitation in wildtype sperm. Furthermore, we show that absence of TXNRD3 alters thiol redox status in both the head and tail during sperm maturation and capacitation, resulting in defective mitochondrial ultrastructure and activity under capacitating conditions. These findings provide insights into molecular mechanisms of redox homeostasis and bioenergetics during sperm maturation, capacitation, and fertilization.
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Affiliation(s)
- Huafeng Wang
- Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven, Connecticut, USA
| | - Qianhui Dou
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kyung Jo Jeong
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, South Korea
| | - Jungmin Choi
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, South Korea; Department of Genetics, Yale School of Medicine, Yale University, New Haven, Connecticut, USA
| | - Vadim N Gladyshev
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jean-Ju Chung
- Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven, Connecticut, USA; Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, Connecticut, USA.
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15
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Cohen R, Mukai C, Nelson JL, Zenilman SS, Sosnicki DM, Travis AJ. A genetically targeted sensor reveals spatial and temporal dynamics of acrosomal calcium and sperm acrosome exocytosis. J Biol Chem 2022; 298:101868. [PMID: 35346690 PMCID: PMC9046242 DOI: 10.1016/j.jbc.2022.101868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 03/19/2022] [Accepted: 03/23/2022] [Indexed: 01/16/2023] Open
Abstract
Secretion of the acrosome, a single vesicle located rostrally in the head of a mammalian sperm, through a process known as "acrosome exocytosis" (AE), is essential for fertilization. However, the mechanisms leading to and regulating this complex process are controversial. In particular, poor understanding of Ca2+ dynamics between sperm subcellular compartments and regulation of membrane fusion mechanisms have led to competing models of AE. Here, we developed a transgenic mouse expressing an Acrosome-targeted Sensor for Exocytosis (AcroSensE) to investigate the spatial and temporal Ca2+ dynamics in AE in live sperm. AcroSensE combines a genetically encoded Ca2+ indicator (GCaMP) fused with an mCherry indicator to spatiotemporally resolve acrosomal Ca2+ rise (ACR) and membrane fusion events, enabling real-time study of AE. We found that ACR is dependent on extracellular Ca2+ and that ACR precedes AE. In addition, we show that there are intermediate steps in ACR and that AE correlates better with the ACR rate rather than absolute Ca2+ amount. Finally, we demonstrate that ACR and membrane fusion progression kinetics and spatial patterns differ with different stimuli and that sites of initiation of ACR and sites of membrane fusion do not always correspond. These findings support a model involving functionally redundant pathways that enable a highly regulated, multistep AE in heterogeneous sperm populations, unlike the previously proposed "acrosome reaction" model.
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Affiliation(s)
- Roy Cohen
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA.
| | - Chinatsu Mukai
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Jacquelyn L Nelson
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Shoshana S Zenilman
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Danielle M Sosnicki
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Alexander J Travis
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA; Department of Public and Ecosystem Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
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16
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Ojaghi M, Varghese J, Kastelic JP, Thundathil JC. Characterization of the Testis-Specific Angiotensin Converting Enzyme (tACE)-Interactome during Bovine Sperm Capacitation. Curr Issues Mol Biol 2022; 44:449-469. [PMID: 35723410 PMCID: PMC8928970 DOI: 10.3390/cimb44010031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/22/2021] [Accepted: 01/12/2022] [Indexed: 12/29/2022] Open
Abstract
A comprehensive understanding of molecular and biochemical changes during sperm capacitation is critical to the success of assisted reproductive technologies. We reported involvement of the testis-specific isoform of Angiotensin Converting Enzyme (tACE) in bovine sperm capacitation. The objective of this study was to characterize the tACE interactome in fresh and heparin-capacitated bovine sperm through immunoprecipitation coupled with mass spectrometry. These interactions were validated by co-localization of tACE with beta-tubulin as an identified interactome constituent. Although interactions between tACE and several proteins remained unchanged in fresh and capacitated sperm, mitochondrial aldehyde dehydrogenase 2 (ALDH2), inactive serine/threonine protein-kinase 3 (VRK3), tubulin-beta-4B chain (TUBB4B), and tubulin-alpha-8 chain (TUBA8) were recruited during capacitation, with implications for cytoskeletal and membrane reorganization, vesicle-mediated transport, GTP-binding, and redox regulation. A proposed tACE interactional network with identified interactome constituents was generated. Despite tACE function being integral to capacitation, the relevance of interactions with its binding partners during capacitation and subsequent events leading to fertilization remains to be elucidated.
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17
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Sansegundo E, Tourmente M, Roldan ERS. Energy Metabolism and Hyperactivation of Spermatozoa from Three Mouse Species under Capacitating Conditions. Cells 2022; 11:220. [PMID: 35053337 PMCID: PMC8773617 DOI: 10.3390/cells11020220] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/05/2022] [Accepted: 01/07/2022] [Indexed: 02/06/2023] Open
Abstract
Mammalian sperm differ widely in sperm morphology, and several explanations have been presented to account for this diversity. Less is known about variation in sperm physiology and cellular processes that can give sperm cells an advantage when competing to fertilize oocytes. Capacitation of spermatozoa, a process essential for mammalian fertilization, correlates with changes in motility that result in a characteristic swimming pattern known as hyperactivation. Previous studies revealed that sperm motility and velocity depend on the amount of ATP available and, therefore, changes in sperm movement occurring during capacitation and hyperactivation may involve changes in sperm bioenergetics. Here, we examine differences in ATP levels of sperm from three mouse species (genus Mus), differing in sperm competition levels, incubated under non-capacitating and capacitating conditions, to analyse relationships between energetics, capacitation, and swimming patterns. We found that, in general terms, the amount of sperm ATP decreased more rapidly under capacitating conditions. This descent was related to the development of a hyperactivated pattern of movement in two species (M. musculus and M. spicilegus) but not in the other (M. spretus), suggesting that, in the latter, temporal dynamics and energetic demands of capacitation and hyperactivation may be decoupled or that the hyperactivation pattern differs. The decrease in ATP levels during capacitation was steeper in species with higher levels of sperm competition than in those with lower levels. Our results suggest that, during capacitation, sperm consume more ATP than under non-capacitating conditions. This higher ATP consumption may be linked to higher velocity and lateral head displacement, which are associated with hyperactivated motility.
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Affiliation(s)
- Ester Sansegundo
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Spanish Research Council (CSIC), 28006 Madrid, Spain;
| | - Maximiliano Tourmente
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Spanish Research Council (CSIC), 28006 Madrid, Spain;
- Centro de Biología Celular y Molecular, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Cordoba X5016GCA, Argentina
- Instituto de Investigaciones Biológicas y Tecnológicas (IIByT), Consejo Nacional de Investigaciones Científica y Técnicas (CONICET), Cordoba X5016GCA, Argentina
| | - Eduardo R. S. Roldan
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Spanish Research Council (CSIC), 28006 Madrid, Spain;
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18
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Giaccagli MM, Gómez-Elías MD, Herzfeld JD, Marín-Briggiler CI, Cuasnicú PS, Cohen DJ, Da Ros VG. Capacitation-Induced Mitochondrial Activity Is Required for Sperm Fertilizing Ability in Mice by Modulating Hyperactivation. Front Cell Dev Biol 2021; 9:767161. [PMID: 34765607 PMCID: PMC8576324 DOI: 10.3389/fcell.2021.767161] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/08/2021] [Indexed: 01/22/2023] Open
Abstract
To become fully competent to fertilize an egg, mammalian sperm undergo a series of functional changes within the female tract, known as capacitation, that require an adequate supply and management of energy. However, the contribution of each ATP generating pathway to sustain the capacitation-associated changes remains unclear. Based on this, we investigated the role of mitochondrial activity in the acquisition of sperm fertilizing ability during capacitation in mice. For this purpose, the dynamics of the mitochondrial membrane potential (MMP) was studied by flow cytometry with the probe tetramethylrhodamine ethyl ester (TMRE). We observed a time-dependent increase in MMP only in capacitated sperm as well as a specific staining with the probe in the flagellar region where mitochondria are confined. The MMP rise was prevented when sperm were exposed to the mitochondrial uncoupler carbonyl cyanide m-chlorophenyl hydrazine (CCCP) or the protein kinase A (PKA) inhibitor H89 during capacitation, indicating that MMP increase is dependent on capacitation and H89-sensitive events. Results showed that whereas nearly all motile sperm were TMRE positive, immotile cells were mostly TMRE negative, supporting an association between high MMP and sperm motility. Furthermore, CCCP treatment during capacitation did not affect PKA substrate and tyrosine phosphorylations but produced a decrease in hyperactivation measured by computer assisted sperm analysis (CASA), similar to that observed after H89 exposure. In addition, CCCP inhibited the in vitro sperm fertilizing ability without affecting cumulus penetration and gamete fusion, indicating that the hyperactivation supported by mitochondrial function is needed mainly for zona pellucida penetration. Finally, complementary in vivo fertilization experiments further demonstrated the fundamental role of mitochondrial activity for sperm function. Altogether, our results show the physiological relevance of mitochondrial functionality for sperm fertilization competence.
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Affiliation(s)
- María Milagros Giaccagli
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Matías Daniel Gómez-Elías
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Jael Dafne Herzfeld
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Clara Isabel Marín-Briggiler
- Laboratorio de Biología Celular y Molecular de la Reproducción, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Patricia Sara Cuasnicú
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Débora Juana Cohen
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
| | - Vanina Gabriela Da Ros
- Laboratorio de Mecanismos Moleculares de la Fertilización, Instituto de Biología y Medicina Experimental (IByME-CONICET), Buenos Aires, Argentina
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19
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Takei GL, Tourzani DA, Paudel B, Visconti PE. Activation of cAMP-dependent phosphorylation pathways is independent of ROS production during mouse sperm capacitation. Mol Reprod Dev 2021; 88:544-557. [PMID: 34318548 DOI: 10.1002/mrd.23524] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 12/26/2022]
Abstract
Mammalian sperm have to undergo capacitation to fertilize the egg. At the molecular level, capacitation involves cAMP synthesis, protein kinase A activation, and downstream increase in tyrosine phosphorylation. In addition, during capacitation, mammalian sperm actively generate reactive oxygen species (ROS). It has been proposed that ROS modulate phosphorylation pathways; however, the crosstalk between these signaling processes is not well-understood. In the present study, we used loss- and gain-of-function approaches to evaluate the interconnection between ROS and phosphorylation. We showed that BSA and HCO3 - , but not Ca2+ , in the capacitation media are required for ROS production. The synergic effect of these compounds was neither mediated by HCO3 - stimulation of cAMP synthesis nor by BSA-induced cholesterol efflux. The capacitation-induced ROS generation was blocked in the presence of superoxide dismutase (SOD), catalase, and apocynin. However, none of these compounds affected cAMP-dependent or tyrosine phosphorylation. On the other hand, the addition of NADPH to the media induced ROS generation in sperm incubated in the absence of BSA and HCO3 - without upregulating cAMP-dependent or tyrosine phosphorylation signaling. Most interestingly, catalase, but not SOD, blocked in vitro fertilization suggesting a role for H2 O2 in this process.
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Affiliation(s)
- Gen L Takei
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, Massachusetts, USA
| | - Darya A Tourzani
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, Massachusetts, USA
| | - Bidur Paudel
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, Massachusetts, USA
| | - Pablo E Visconti
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, Massachusetts, USA
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20
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Bull Sperm Capacitation Is Accompanied by Redox Modifications of Proteins. Int J Mol Sci 2021; 22:ijms22157903. [PMID: 34360666 PMCID: PMC8347624 DOI: 10.3390/ijms22157903] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 12/19/2022] Open
Abstract
The ability to fertilise an egg is acquired by the mammalian sperm during the complex biochemical process called capacitation. Capacitation is accompanied by the production of reactive oxygen species (ROS), but the mechanism of redox regulation during capacitation has not been elucidated. This study aimed to verify whether capacitation coincides with reversible oxidative post-translational modifications of proteins (oxPTMs). Flow cytometry, fluorescence microscopy and Western blot analyses were used to verify the sperm capacitation process. A fluorescent gel-based redox proteomic approach allowed us to observe changes in the level of reversible oxPTMs manifested by the reduction or oxidation of susceptible cysteines in sperm proteins. Sperm capacitation was accompanied with redox modifications of 48 protein spots corresponding to 22 proteins involved in the production of ROS (SOD, DLD), playing a role in downstream redox signal transfer (GAPDHS and GST) related to the cAMP/PKA pathway (ROPN1L, SPA17), acrosome exocytosis (ACRB, sperm acrosome associated protein 9, IZUMO4), actin polymerisation (CAPZB) and hyperactivation (TUBB4B, TUB1A). The results demonstrated that sperm capacitation is accompanied by altered levels of oxPTMs of a group of redox responsive proteins, filling gaps in our knowledge concerning sperm capacitation.
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21
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Setiawan R, Priyadarshana C, Tajima A, Travis AJ, Asano A. Localisation and function of glucose transporter GLUT1 in chicken (Gallus gallus domesticus) spermatozoa: relationship between ATP production pathways and flagellar motility. Reprod Fertil Dev 2021; 32:697-705. [PMID: 32317094 DOI: 10.1071/rd19240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/30/2019] [Indexed: 12/26/2022] Open
Abstract
Glucose plays an important role in sperm flagellar motility and fertility via glycolysis and oxidative phosphorylation, although the primary mechanisms for ATP generation vary between species. The glucose transporter 1 (GLUT1) is a high-affinity isoform and a major glucose transporter in mammalian spermatozoa. However, in avian spermatozoa, the glucose metabolic pathways are poorly characterised. This study demonstrates that GLUT1 plays a major role in glucose-mediated motility of chicken spermatozoa. Using specific antibodies and ligand, we found that GLUT1 was specifically localised to the midpiece. Sperm motility analysis showed that glucose supported sperm movement during incubation for 0-80min. However, this was abolished by the addition of a GLUT1 inhibitor, concomitant with a substantial decrease in glucose uptake and ATP production, followed by elevated mitochondrial activity in response to glucose addition. More potent inhibition of ATP production and mitochondrial activity was observed in response to treatment with uncouplers of oxidative phosphorylation. Because mitochondrial inhibition only reduced a subset of sperm movements, we investigated the localisation of the glycolytic pathway and showed glyceraldehyde-3-phosphate dehydrogenase and hexokinase I at the midpiece and principal piece of the flagellum. The results of this study provide new insights into the mechanisms involved in ATP production pathways in avian spermatozoa.
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Affiliation(s)
- Rangga Setiawan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Chathura Priyadarshana
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Atsushi Tajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Alexander J Travis
- Baker Institute for Animal Health, Cornell University, Hungerford Hill Road, Ithaca, NY 14853, USA
| | - Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan; and Corresponding author.
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22
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Balbach M, Gervasi MG, Hidalgo DM, Visconti PE, Levin LR, Buck J. Metabolic changes in mouse sperm during capacitation†. Biol Reprod 2020; 103:791-801. [PMID: 32614044 DOI: 10.1093/biolre/ioaa114] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/17/2020] [Accepted: 06/26/2020] [Indexed: 11/12/2022] Open
Abstract
Mammalian sperm are stored in the epididymis in a dormant state. Upon ejaculation, they must immediately start producing sufficient energy to maintain motility and support capacitation. While this increased energy demand during capacitation is well established, it remains unclear how mouse sperm modify their metabolism to meet this need. We now show that capacitating mouse sperm enhance glucose uptake, identifying glucose uptake as a functional marker of capacitation. Using an extracellular flux analyzer, we show that glycolysis and oxidative phosphorylation increase during capacitation. Furthermore, this increase in oxidative phosphorylation is dependent on glycolysis, providing experimental evidence for a link between glycolysis and oxidative phosphorylation in mouse sperm.
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Affiliation(s)
- Melanie Balbach
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA
| | - Maria Gracia Gervasi
- Department of Veterinary and Animal Sciences, Integrated Science Building (ISB), University of Massachusetts, Amherst, MA, USA
| | - David Martin Hidalgo
- Department of Veterinary and Animal Sciences, Integrated Science Building (ISB), University of Massachusetts, Amherst, MA, USA
| | - Pablo E Visconti
- Department of Veterinary and Animal Sciences, Integrated Science Building (ISB), University of Massachusetts, Amherst, MA, USA
| | - Lonny R Levin
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA
| | - Jochen Buck
- Department of Pharmacology, Weill Cornell Medical College, New York, NY, USA
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Rago V, De Rose D, Santoro M, Panza S, Malivindi R, Andò S, D'Agata R, Aquila S. Human Sperm Express the Receptor for Glucagon-like Peptide-1 (GLP-1), Which Affects Sperm Function and Metabolism. Endocrinology 2020; 161:5802751. [PMID: 32157297 DOI: 10.1210/endocr/bqaa031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 03/09/2020] [Indexed: 12/15/2022]
Abstract
AIM Glucagon-like peptide-1 (GLP-1) produces pleiotropic effects binding to the GLP-1 receptor (GLP1-R), potentiating insulin secretion in the pancreas. GLP1-R is expressed in peripheral tissues and evidence for its role in reproduction has come from knockout mice, although the relationship between GLP-1 and male fertility needs to be clarified. Given that human sperm is an insulin-sensitive and insulin-secreting cell, we hypothesized that the GLP-1/GLP1-R axis may be expressed and functional in these cells. RESULTS AND DISCUSSION We revealed the presence of GLP1-R by Western blotting and immunofluorescence analyses. Because Exendin-4 (Ex-4) displays similar functional properties to native GLP-1, we used this agonist to perform a dose-response study on progressive motility and cholesterol efflux, showing that 300 pM Ex-4 was the most effective treatment. These actions are mediated by GLP1-R and independent from sperm-secreted insulin. The exposure to Ex-4 fueled phosphatidylinositol-3-kinase (PI3K)/AKT signaling and was reversed by H89, indicating a protein kinase A (PKA)-dependence of GLP-1/GLP1-R signaling. It emerged that in sperm, insulin secretion regulated by Ex-4 did not occur in a strictly glucose-dependent manner. A stimulatory action of Ex-4/GLP1-R on lactate dehydrogenase and glucose-6-phosphate dehydrogenase (G6PDH) activities was observed. Ex-4/GLP1-R decreased triglycerides content concomitantly to enhanced lipase and acyl-coenzyme A (acyl-CoA) dehydrogenase activities, addressing a lipolytic effect. CONCLUSION Collectively, we discovered that human sperm is a new GLP1 incretin target, broadening our knowledge about the effects of the GLP1-R agonist in the male reproductive field. Further findings in humans should be conducted in the future to confirm it and to improve the translational aspect of this study.
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Affiliation(s)
- Vittoria Rago
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
| | - Daniela De Rose
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
- Centro Sanitario, University of Calabria Cosenza, Italy
| | - Marta Santoro
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
- Centro Sanitario, University of Calabria Cosenza, Italy
| | - Salvatore Panza
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
- Centro Sanitario, University of Calabria Cosenza, Italy
| | - Rocco Malivindi
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
| | - Sebastiano Andò
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
- Centro Sanitario, University of Calabria Cosenza, Italy
| | - Rosario D'Agata
- Department of Experimental and Clinical Medicine, University of Catania, Catania, Italy
| | - Saveria Aquila
- Department of Pharmacy and Sciences of Health and Nutrition, University of Calabria Cosenza, Italy
- Centro Sanitario, University of Calabria Cosenza, Italy
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Tourmente M, Varea-Sánchez M, Roldan ERS. Faster and more efficient swimming: energy consumption of murine spermatozoa under sperm competition†. Biol Reprod 2020; 100:420-428. [PMID: 30203065 DOI: 10.1093/biolre/ioy197] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 06/22/2018] [Accepted: 09/08/2018] [Indexed: 11/14/2022] Open
Abstract
ATP supply is essential for sperm performance and increases in ATP content coevolve with enhanced sperm swimming velocity as a response to sperm competition in rodents. ATP content is the balance between production and consumption but, although ATP production has received much attention, little is known about ATP consumption. The rate of ATP consumption is crucial for the propagation of the flagellar wave, becoming a main determinant of the time and distance sperm could move before exhausting their reserves. A high yield in distance per unit of ATP consumed (efficiency) could provide advantages in sperm competition. We characterized sperm ATP consumption rate in a group of mouse species with different sperm competition levels to understand its impact on swimming velocity, duration, and yield of sperm ATP reserves. Interspecific comparisons revealed that sperm of species with higher sperm competition levels had high ATP consumption rates and faster swimming velocity. Moreover, sperm that consumed ATP at a faster rate swam more efficiently, since they were able to cover more distance per unit of ATP consumed. Our results suggest that by coupling the advantages of higher ATP turnover rates to increased efficiency of ATP expenditure, sperm would respond to increasingly competitive environments while maintaining a positive ATP balance.
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Affiliation(s)
- Maximiliano Tourmente
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Madrid, Spain
- College of Life and Environmental Sciences, University of Exeter, Penryn, UK
| | - María Varea-Sánchez
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Madrid, Spain
| | - Eduardo R S Roldan
- Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales, Madrid, Spain
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25
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Shahrokhi SZ, Salehi P, Alyasin A, Taghiyar S, Deemeh MR. Asthenozoospermia: Cellular and molecular contributing factors and treatment strategies. Andrologia 2019; 52:e13463. [DOI: 10.1111/and.13463] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/13/2019] [Accepted: 09/22/2019] [Indexed: 12/18/2022] Open
Affiliation(s)
- Seyedeh Zahra Shahrokhi
- Department of Laboratory Medicine School of Allied Medical Sciences Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Peyman Salehi
- Infertility Center Shahid Beheshti Hospital Isfahan Iran
| | | | | | - Mohammad Reza Deemeh
- Andrology Department Nobel Laboratory Isfahan Iran
- Department of Clinical Biochemistry Faculty of Medical Sciences Tarbiat Modares University Tehran Iran
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26
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Rajamanickam GD, Kastelic JP, Thundathil JC. Testis-Specific Isoform of Na/K-ATPase (ATP1A4) Interactome in Raft and Non-Raft Membrane Fractions from Capacitated Bovine Sperm. Int J Mol Sci 2019; 20:E3159. [PMID: 31261667 PMCID: PMC6651793 DOI: 10.3390/ijms20133159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 05/16/2019] [Indexed: 11/28/2022] Open
Abstract
The plasma membrane of sperm contains highly dynamic lipid microdomains (rafts), which house signaling proteins with a role in regulating capacitation. We reported that ATP1A4, the testis-specific isoform of Na/K-ATPase, interacted with caveolin-1, Src, epidermal growth factor receptor (EGFR) and extracellular signal-regulated kinases 1/2 (ERK1/2) in raft and non-raft domains of the plasma membrane of bovine sperm during capacitation. The objective of the present study was to use a proteomic approach to characterize the ATP1A4 interactome in rafts and non-rafts from capacitated bovine sperm. The non-raft interactome included hexokinase 1, plakophilin 1, desmoglein 1, 14-3-3 protein ζ/δ, cathepsin D and heat shock protein beta1 proteins exclusively, whereas glutathione S-transferase and annexin A2 were unique to raft interactome. However, a disintegrin and metalloprotease 32 (ADAM 32), histone H4, actin, acrosin, serum albumin and plakoglobin were identified in both raft and non-raft fractions of capacitated sperm. Based on gene ontology studies, these differentially interacted proteins were implicated in cell-cell adhesion, signal transduction, fertilization, metabolism, proteolysis and DNA replication, in addition to acting as transport/carrier and cytoskeletal proteins. Overall, we identified proteins not previously reported to interact with ATP1A4; furthermore, we inferred that ATP1A4 may have a role in sperm capacitation.
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Affiliation(s)
- Gayathri D Rajamanickam
- Department of Veterinary Clinical and Diagnostic Services, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - John P Kastelic
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jacob C Thundathil
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
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27
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Activation of adenosine monophosphate-activated protein kinase (AMPK) enhances energy metabolism, motility, and fertilizing ability of cryopreserved spermatozoa in domestic cat model. J Assist Reprod Genet 2019; 36:1401-1412. [PMID: 31079268 DOI: 10.1007/s10815-019-01470-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 04/28/2019] [Indexed: 12/11/2022] Open
Abstract
PURPOSE Increasing intracellular energy storage by chemically activating adenosine monophosphate-activated protein kinase (AMPKα) prior to sperm cryopreservation may improve post-thawed sperm function. Using the domestic cat as a biomedical model, the objectives were to (1) confirm the expression of AMPKα and its regulatory kinases in epididymal spermatozoa and (2) assess the influence of AMPK activator, 5'-aminoimidasole-4-carboxamide-1-β-d-ribofuranoside (AICAR) on epididymal sperm function before and after cryopreservation. METHODS In study I, sperm samples of different qualities were obtained from cauda epididymides of domestic cats and evaluated for AMPKα expression. In study II, epididymal spermatozoa were equilibrated for either 30 or 60 min in the presence of 0 (control), 0.5, 2.0, and 5.0 mM AICAR and sperm functions were assessed before and after cryopreservation. In study III, epididymal spermatozoa were treated as in study II and evaluated for AMPKα signaling protein expressions (phospho-AMPKα Thr172 and GLUT1) as well as ATP levels. RESULTS AMPKα protein expression was higher in high-motility vs poor-motility samples. Thirty-minute equilibration with 0.5 mM AICAR improved motion characteristics and fertilizing ability of cryopreserved sperm to the control. Increased expressions of phospho-AMPKα Thr172 and GLUT1 as well as intracellular ATP level were confirmed in sperm samples equilibrated with 0.5 or 2.0 mM AICAR for 30 min. CONCLUSIONS Presence and role of AMPKα protein in cat regulating sperm function were demonstrated before and after cryopreservation. Findings could be used to potentially enhance cryopreserved sperm function in sub-fertile men.
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28
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Ushiyama A, Priyadarshana C, Setiawan R, Miyazaki H, Ishikawa N, Tajima A, Asano A. Membrane raft-mediated regulation of glucose signaling pathway leading to acrosome reaction in chicken sperm†. Biol Reprod 2019; 100:1482-1491. [DOI: 10.1093/biolre/ioz015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/21/2018] [Accepted: 02/01/2019] [Indexed: 01/13/2023] Open
Affiliation(s)
- Ai Ushiyama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Chathura Priyadarshana
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Rangga Setiawan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Hitoshi Miyazaki
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Naoto Ishikawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Atsushi Tajima
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
| | - Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki—, Japan
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29
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Mehdipour M, Daghigh Kia H, Moghaddam G, Hamishehkar H. Effect of egg yolk plasma and soybean lecithin on rooster frozen-thawed sperm quality and fertility. Theriogenology 2018; 116:89-94. [PMID: 29787941 DOI: 10.1016/j.theriogenology.2018.05.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 05/10/2018] [Accepted: 05/12/2018] [Indexed: 11/19/2022]
Abstract
This experiment was conducted to study the effects of egg yolk plasma (10%, 15% and 20%), soybean lecithin (0.5%, 1% and 1.5%) and whole egg yolk (WEY) (control) on post-thawed sperm quality, hatchability and fertility outcomes. In experiment 1, sperm motility, abnormalities, membrane integrity, viability, apoptosis status, mitochondrial activity were studied following freeze-thawing. The best quality of frozen-thawed rooster sperm was chosen to be used for the assessment of the hatchability and fertility rate in experiment 2. The significantly higher percentages of post-thawing sperm total and progressive sperm motilities, membrane integrity, viability were observed in 1% soybean lecithin and 20% egg yolk plasma in comparison with 0.5 and 1% soybean lecithin, 10% egg yolk plasma and control, except for 15% egg yolk plasma (P < 0.05). Using 20% egg yolk plasma in the extender improved mitochondrial activity. Supplementation of 1% soybean lecithin and 20% egg yolk plasma into the extender resulted in the least percentages of dead sperm (P < 0.05). Sperm abnormalities and early apoptosis did not differ in various extender supplementations. In experiment 2, higher percentages of hatchability and fertility rate were observed in semen containing 1% soybean lecithin and 20% egg yolk plasma compared with the WEY group. The results showed that supplementation of the rooster sperm extender with 1% soybean lecithin and 20% egg yolk plasma resulted in higher quality of frozen-thawed sperm.
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Affiliation(s)
- Mahdieh Mehdipour
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
| | - Hossein Daghigh Kia
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran.
| | - Gholamali Moghaddam
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
| | - Hamed Hamishehkar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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30
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Aitken RJ. Reactive oxygen species as mediators of sperm capacitation and pathological damage. Mol Reprod Dev 2017; 84:1039-1052. [PMID: 28749007 DOI: 10.1002/mrd.22871] [Citation(s) in RCA: 343] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/23/2017] [Indexed: 12/12/2022]
Abstract
Oxidative stress plays a major role in the life and death of mammalian spermatozoa. These gametes are professional generators of reactive oxygen species (ROS), which appear to derive from three potential sources: sperm mitochondria, cytosolic L-amino acid oxidases, and plasma membrane Nicotinamide adenine dinucleotide phosphate oxidases. The oxidative stress created via these sources appears to play a significant role in driving the physiological changes associated with sperm capacitation through the stimulation of a cyclic adenosine monophosphate/Protein kinase A phosphorylation cascade, including the activation of Extracellular signal regulated kinase-like proteins, massive up-regulation of tyrosine phosphorylation in the sperm tail, as well as the induction of sterol oxidation. When generated in excess, however, ROS can induce lipid peroxidation that, in turn, disrupts membrane characteristics that are critical for the maintenance of sperm function, including the capacity to fertilize an egg. Furthermore, the lipid aldehydes generated as a consequence of lipid peroxidation bind to proteins in the mitochondrial electron transport chain, triggering yet more ROS generation in a self-perpetuating cycle. The high levels of oxidative stress created as a result of this process ultimately damage the DNA in the sperm nucleus; indeed, DNA damage in the male germ line appears to be predominantly induced oxidatively, reflecting the vulnerability of these cells to such stress. Extensive evaluation of antioxidants that protect the spermatozoa against oxidative stress while permitting the normal reduction-oxidation regulation of sperm capacitation is therefore currently being undertaken, and has already proven efficacious in animal models.
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Affiliation(s)
- Robert J Aitken
- Discipline of Biological Sciences Priority Research Centre in Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia
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31
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Huang Z, Danshina PV, Mohr K, Qu W, Goodson SG, O’Connell TM, O’Brien DA. Sperm function, protein phosphorylation, and metabolism differ in mice lacking successive sperm-specific glycolytic enzymes†. Biol Reprod 2017; 97:586-597. [DOI: 10.1093/biolre/iox103] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 08/25/2017] [Indexed: 11/13/2022] Open
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32
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Tourmente M, Hirose M, Ibrahim S, Dowling DK, Tompkins DM, Roldan ERS, Gemmell NJ. mtDNA polymorphism and metabolic inhibition affect sperm performance in conplastic mice. Reproduction 2017; 154:341-354. [PMID: 28676531 DOI: 10.1530/rep-17-0206] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/23/2017] [Accepted: 07/04/2017] [Indexed: 12/12/2022]
Abstract
Whereas a broad link exists between nucleotide substitutions in the mitochondrial genome (mtDNA) and a range of metabolic pathologies, exploration of the effect of specific mtDNA genotypes is on-going. Mitochondrial DNA mutations are of particular relevance for reproductive traits, since they are expected to have profound effects on male specific processes as a result of the strict maternal inheritance of mtDNA. Sperm motility is crucially dependent on ATP in most systems studied. However, the importance of mitochondrial function in the production of the ATP necessary for sperm function remains uncertain. In this study, we test the effect of mtDNA polymorphisms upon mouse sperm performance and bioenergetics by using five conplastic inbred strains that share the same nuclear background while differing in their mitochondrial genomes. We found that, while genetic polymorphisms across distinct mtDNA haplotypes are associated with modification in sperm progressive velocity, this effect is not related to ATP production. Furthermore, there is no association between the number of mtDNA polymorphisms and either (a) the magnitude of sperm performance decrease, or (b) performance response to specific inhibition of the main sperm metabolic pathways. The observed variability between strains may be explained in terms of additive effects of single nucleotide substitutions on mtDNA coding sequences, which have been stabilized through genetic drift in the different laboratory strains. Alternatively, the decreased sperm performance might have arisen from the disruption of the nuclear DNA/mtDNA interactions that have coevolved during the radiation of Mus musculus subspecies.
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Affiliation(s)
- Maximiliano Tourmente
- Department of Biodiversity and Evolutionary BiologyMuseo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - Misa Hirose
- Institute of Experimental DermatologyUniversity of Luebeck, Luebeck, Germany
| | - Saleh Ibrahim
- Institute of Experimental DermatologyUniversity of Luebeck, Luebeck, Germany
| | - Damian K Dowling
- School of Biological SciencesMonash University, Clayton, Australia
| | | | - Eduardo R S Roldan
- Department of Biodiversity and Evolutionary BiologyMuseo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - Neil J Gemmell
- Department of AnatomyUniversity of Otago, Dunedin, New Zealand
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33
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Breininger E, Dubois D, Pereyra VE, Rodriguez PC, Satorre MM, Cetica PD. Participation of phosphofructokinase, malate dehydrogenase and isocitrate dehydrogenase in capacitation and acrosome reaction of boar spermatozoa. Reprod Domest Anim 2017; 52:731-740. [DOI: 10.1111/rda.12973] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 02/25/2017] [Indexed: 11/29/2022]
Affiliation(s)
- E Breininger
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
- Investigaciones en Producción Animal (INPA); CONICET - Universidad de Buenos Aires; Buenos Aires Argentina
| | - D Dubois
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
| | - VE Pereyra
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
| | - PC Rodriguez
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
| | - MM Satorre
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
| | - PD Cetica
- Facultad de Ciencias Veterinarias; Instituto de Investigación y Tecnología en Reproducción Animal (INITRA); Universidad de Buenos Aires; Buenos Aires Argentina
- Investigaciones en Producción Animal (INPA); CONICET - Universidad de Buenos Aires; Buenos Aires Argentina
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34
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Mukai C, Gao L, Nelson JL, Lata JP, Cohen R, Wu L, Hinchman MM, Bergkvist M, Sherwood RW, Zhang S, Travis AJ. Biomimicry Promotes the Efficiency of a 10‐Step Sequential Enzymatic Reaction on Nanoparticles, Converting Glucose to Lactate. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chinatsu Mukai
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | - Lizeng Gao
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | - Jacquelyn L. Nelson
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | - James P. Lata
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
- Biomedical Engineering Cornell University Ithaca NY 14853 USA
| | - Roy Cohen
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | - Lauren Wu
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | - Meleana M. Hinchman
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
| | | | - Robert W. Sherwood
- LSCLC Proteomics and Mass Spectrometry Facility Cornell University Ithaca NY 14853 USA
| | - Sheng Zhang
- LSCLC Proteomics and Mass Spectrometry Facility Cornell University Ithaca NY 14853 USA
| | - Alexander J. Travis
- Baker Institute for Animal Health College of Veterinary Medicine Cornell University Ithaca NY 14853 USA
- Atkinson Center for a Sustainable Future Cornell University Ithaca NY 14853 USA
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35
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Mukai C, Gao L, Nelson JL, Lata JP, Cohen R, Wu L, Hinchman MM, Bergkvist M, Sherwood RW, Zhang S, Travis AJ. Biomimicry Promotes the Efficiency of a 10-Step Sequential Enzymatic Reaction on Nanoparticles, Converting Glucose to Lactate. Angew Chem Int Ed Engl 2016; 56:235-238. [PMID: 27901298 DOI: 10.1002/anie.201609495] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Indexed: 01/07/2023]
Abstract
For nanobiotechnology to achieve its potential, complex organic-inorganic systems must grow to utilize the sequential functions of multiple biological components. Critical challenges exist: immobilizing enzymes can block substrate-binding sites or prohibit conformational changes, substrate composition can interfere with activity, and multistep reactions risk diffusion of intermediates. As a result, the most complex tethered reaction reported involves only 3 enzymes. Inspired by the oriented immobilization of glycolytic enzymes on the fibrous sheath of mammalian sperm, here we show a complex reaction of 10 enzymes tethered to nanoparticles. Although individual enzyme efficiency was higher in solution, the efficacy of the 10-step pathway measured by conversion of glucose to lactate was significantly higher when tethered. To our knowledge, this is the most complex organic-inorganic system described, and it shows that tethered, multi-step biological pathways can be reconstituted in hybrid systems to carry out functions such as energy production or delivery of molecular cargo.
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Affiliation(s)
- Chinatsu Mukai
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Lizeng Gao
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Jacquelyn L Nelson
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - James P Lata
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.,Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA
| | - Roy Cohen
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Lauren Wu
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Meleana M Hinchman
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | | | - Robert W Sherwood
- LSCLC Proteomics and Mass Spectrometry Facility, Cornell University, Ithaca, NY, 14853, USA
| | - Sheng Zhang
- LSCLC Proteomics and Mass Spectrometry Facility, Cornell University, Ithaca, NY, 14853, USA
| | - Alexander J Travis
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA.,Atkinson Center for a Sustainable Future, Cornell University, Ithaca, NY, 14853, USA
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36
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Nguyen QT, Wallner U, Schmicke M, Waberski D, Henning H. Energy metabolic state in hypothermically stored boar spermatozoa using a revised protocol for efficient ATP extraction. Biol Open 2016; 5:1743-1751. [PMID: 27612509 PMCID: PMC5155523 DOI: 10.1242/bio.017954] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Mammalian spermatozoa utilize ATP as the energy source for key functions on the route to fertilization. ATP and its precursor nucleotides ADP and AMP are regularly investigated in sperm physiology studies, mostly by bioluminescence assays. Assay results vary widely, mainly due to different efficiencies in nucleotide extraction and prevention of their enzymatic degradation. Here, we describe a revised, validated protocol for efficient phosphatase inhibition and adenine nucleotide extraction resulting in consistently high ATP concentrations exceeding previously reported values for boar spermatozoa up to 20-fold. The revised assay is applicable for determining ATP concentrations and adenylate energy charge in extracts from fresh and frozen samples, thereby allowing simultaneous assessment of semen samples from long-term storage experiments. After validation, the assay was applied to liquid-preserved boar spermatozoa stored at 17°C and 5°C for 24 and 72 h. Cooling to 5°C, but not storage duration, reduced ATP concentration in spermatozoa (P<0.05), which was accompanied by the appearance of AMP and ADP in the preservation medium. ATP and energy charge were highly correlated to the proportion of membrane-intact spermatozoa, supporting the idea of nucleotides leaking through disrupted membranes in cold-shocked cells. The present assay allows highly standardized studies of energy metabolism in spermatozoa. Summary: A revised protocol for efficient extraction of ATP from boar spermatozoa is presented that consistently yields high ATP contents and energy charge values from fresh and frozen samples.
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Affiliation(s)
- Quynh Thu Nguyen
- Unit for Reproductive Medicine of Clinics/Clinic for Pigs and Small Ruminants, University of Veterinary Medicine Hannover, Buenteweg 15, Hannover 30559, Germany.,Department of Animal Sciences, University of Göttingen, Albrecht-Thaer-Weg 3, Göttingen 37075, Germany
| | - Ulrike Wallner
- Unit for Reproductive Medicine of Clinics/Clinic for Pigs and Small Ruminants, University of Veterinary Medicine Hannover, Buenteweg 15, Hannover 30559, Germany
| | - Marion Schmicke
- Clinic for Cattle, Endocrinology Laboratory, University of Veterinary Medicine Hannover, Hannover, Bischofsholer Damm 15, Hannover 30173, Germany
| | - Dagmar Waberski
- Unit for Reproductive Medicine of Clinics/Clinic for Pigs and Small Ruminants, University of Veterinary Medicine Hannover, Buenteweg 15, Hannover 30559, Germany
| | - Heiko Henning
- Unit for Reproductive Medicine of Clinics/Clinic for Pigs and Small Ruminants, University of Veterinary Medicine Hannover, Buenteweg 15, Hannover 30559, Germany .,Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 112, Utrecht 3584 CM, The Netherlands
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Effects of glucose metabolism pathways on sperm motility and oxidative status during long-term liquid storage of goat semen. Theriogenology 2016; 86:839-49. [DOI: 10.1016/j.theriogenology.2016.03.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 03/03/2016] [Accepted: 03/03/2016] [Indexed: 11/23/2022]
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Luna C, Serrano E, Domingo J, Casao A, Pérez-Pé R, Cebrián-Pérez J, Muiño-Blanco T. Expression, cellular localization, and involvement of the pentose phosphate pathway enzymes in the regulation of ram sperm capacitation. Theriogenology 2016; 86:704-14. [DOI: 10.1016/j.theriogenology.2016.02.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 01/27/2016] [Accepted: 02/27/2016] [Indexed: 02/07/2023]
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Salman TM, Olayaki LA, Alagbonsi IA, Oyewopo AO. Spermatotoxic effects of galactose and possible mechanisms of action. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2016. [DOI: 10.1016/j.mefs.2015.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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40
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Chung SSW, Wang X, Wolgemuth DJ. Prolonged Oral Administration of a Pan-Retinoic Acid Receptor Antagonist Inhibits Spermatogenesis in Mice With a Rapid Recovery and Changes in the Expression of Influx and Efflux Transporters. Endocrinology 2016; 157:1601-12. [PMID: 26812157 PMCID: PMC4816726 DOI: 10.1210/en.2015-1675] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We have previously shown that oral administration of a pan-retinoic acid receptor antagonist in mice daily at 2.5 mg/kg for 4 weeks reversibly inhibited spermatogenesis, with no detectable side effects. To elucidate the lowest dose and the longest dosing regimen that inhibits spermatogenesis but results in complete restoration of fertility upon cessation of administration of the drug, we examined the effects of daily doses as low as 1.0 mg/kg with dosing periods of 4, 8, and 16 weeks. We observed 100% sterility in all regimens, with restoration of fertility upon cessation of the drug treatment even for as long as 16 weeks. There was no change in testosterone levels in these males and the progeny examined from 2 of the recovered males were healthy and fertile, with normal testicular weight and testicular histology. Strikingly, a more rapid recovery, as assessed by mating studies, was observed at the lower dose and longer dosing periods. Insight into possible mechanisms underlying this rapid recovery was obtained at 2 levels. First, histological examination revealed that spermatogenesis was not as severely disrupted at the lower dose and with the longer treatment regimens. Second, gene expression analysis revealed that the more rapid recovery may involve the interplay of ATP-binding cassette efflux and solute carrier influx transporters in the testes.
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Affiliation(s)
- Sanny S W Chung
- Departments of Genetics and Development (S.S.W.C., X.W., D.J.W.) and Obstetrics and Gynecology (D.J.W.), The Institute of Human Nutrition (D.J.W.), and The Herbert Irving Comprehensive Cancer Center (D.J.W.), Columbia University Medical Center, New York, New York 10032
| | - Xiangyuan Wang
- Departments of Genetics and Development (S.S.W.C., X.W., D.J.W.) and Obstetrics and Gynecology (D.J.W.), The Institute of Human Nutrition (D.J.W.), and The Herbert Irving Comprehensive Cancer Center (D.J.W.), Columbia University Medical Center, New York, New York 10032
| | - Debra J Wolgemuth
- Departments of Genetics and Development (S.S.W.C., X.W., D.J.W.) and Obstetrics and Gynecology (D.J.W.), The Institute of Human Nutrition (D.J.W.), and The Herbert Irving Comprehensive Cancer Center (D.J.W.), Columbia University Medical Center, New York, New York 10032
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41
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Cohen R, Lata JP, Lee Y, Hernández JCC, Nishimura N, Schaffer CB, Mukai C, Nelson JL, Brangman SA, Agrawal Y, Travis AJ. Use of Tethered Enzymes as a Platform Technology for Rapid Analyte Detection. PLoS One 2015; 10:e0142326. [PMID: 26605916 PMCID: PMC4659663 DOI: 10.1371/journal.pone.0142326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/19/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Rapid diagnosis for time-sensitive illnesses such as stroke, cardiac arrest, and septic shock is essential for successful treatment. Much attention has therefore focused on new strategies for rapid and objective diagnosis, such as Point-of-Care Tests (PoCT) for blood biomarkers. Here we use a biomimicry-based approach to demonstrate a new diagnostic platform, based on enzymes tethered to nanoparticles (NPs). As proof of principle, we use oriented immobilization of pyruvate kinase (PK) and luciferase (Luc) on silica NPs to achieve rapid and sensitive detection of neuron-specific enolase (NSE), a clinically relevant biomarker for multiple diseases ranging from acute brain injuries to lung cancer. We hypothesize that an approach capitalizing on the speed and catalytic nature of enzymatic reactions would enable fast and sensitive biomarker detection, suitable for PoCT devices. METHODS AND FINDINGS We performed in-vitro, animal model, and human subject studies. First, the efficiency of coupled enzyme activities when tethered to NPs versus when in solution was tested, demonstrating a highly sensitive and rapid detection of physiological and pathological concentrations of NSE. Next, in rat stroke models the enzyme-based assay was able in minutes to show a statistically significant increase in NSE levels in samples taken 1 hour before and 0, 1, 3 and 6 hours after occlusion of the distal middle cerebral artery. Finally, using the tethered enzyme assay for detection of NSE in samples from 20 geriatric human patients, we show that our data match well (r = 0.815) with the current gold standard for biomarker detection, ELISA-with a major difference being that we achieve detection in 10 minutes as opposed to the several hours required for traditional ELISA. CONCLUSIONS Oriented enzyme immobilization conferred more efficient coupled activity, and thus higher assay sensitivity, than non-tethered enzymes. Together, our findings provide proof of concept for using oriented immobilization of active enzymes on NPs as the basis for a highly rapid and sensitive biomarker detection platform. This addresses a key challenge in developing a PoCT platform for time sensitive and difficult to diagnose pathologies.
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Affiliation(s)
- Roy Cohen
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Rd., Ithaca, NY 14853, United States of America
| | - James P. Lata
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Rd., Ithaca, NY 14853, United States of America
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
| | - Yurim Lee
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
| | - Jean C. Cruz Hernández
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
| | - Nozomi Nishimura
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
| | - Chris B. Schaffer
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
| | - Chinatsu Mukai
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Rd., Ithaca, NY 14853, United States of America
| | - Jacquelyn L. Nelson
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Rd., Ithaca, NY 14853, United States of America
| | - Sharon A. Brangman
- Central New York ADAC, SUNY Upstate Medical University, Syracuse, NY 13210, United States of America
| | - Yash Agrawal
- New York Presbyterian Hospital-Cornell Campus, Cornell University, Ithaca, NY 10065, United States of America
| | - Alexander J. Travis
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Rd., Ithaca, NY 14853, United States of America
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, United States of America
- Atkinson Center for a Sustainable Future, Cornell University, Ithaca, NY 14853, United States of America
- * E-mail:
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42
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Anfuso CD, Olivieri M, Bellanca S, Salmeri M, Motta C, Scalia M, Satriano C, La Vignera S, Burrello N, Caporarello N, Lupo G, Calogero AE. Asthenozoospermia and membrane remodeling enzymes: a new role for phospholipase A2. Andrology 2015; 3:1173-82. [PMID: 26446356 DOI: 10.1111/andr.12101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/14/2015] [Accepted: 08/01/2015] [Indexed: 01/29/2023]
Abstract
Phosholipase A2 (PLA2 ) activity in the seminal plasma and in sperm heads is closely related to sperm motility and male fertility. Therefore, the purpose of this study was to investigate the possible involvement of different isoforms of phospholipase in asthenozoospermia. To accomplish this, cPLA2 , phospho-cPLA2 , iPLA2 , and sPLA2 were evaluated by immunofluorescence and immunoblot analyses in spermatozoa obtained from 22 normozoospermic men and 28 asthenozoospermic patients. We found significant differences in cPLA2 and its phosphorylated/activated form, iPLA2 , and sPLA2 content and distribution in normal and asthenozoospermic patients. cPLA2 was localized in heads, midpieces, and tails of all spermatozoa as constitutive enzyme, less expressed in the tail of spermatozoa with low progressive motility. While active phospho-cPLA2 distribution was homogeneous throughout the cell body of control-donor spermatozoa, lower levels were detected in the tails of asthenozoospermic patients, as opposed to its strong presence in heads. Low immunofluorescence signal for iPLA2 was found in astenozoospermic patients, whereas sPLA2 was significantly lower in the heads of asthenozoospermic patients. Spermatozoa with low progressive motility showed differences both in terms of total specific activity and of intracellular distribution. cPLA2 , iPLA2 , and sPLA2 specific activities correlated positively and in a significantly manner with sperm progressive motility both in normozoospermic men and asthenozoospermic patients. In conclusion, PLA2 s are expressed in different areas of human spermatozoa. Spermatozoa with low motility showed differences in total specific activity and enzyme distributions. We speculated that PLA2 expression and/or different distribution could be potential biomarkers of asthenozoospermia, one of the major causes of male factor infertility.
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Affiliation(s)
- C D Anfuso
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - M Olivieri
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - S Bellanca
- Department of General Surgery and Medical-Surgical Specialties, School of Medicine, University of Catania, Catania, Italy
| | - M Salmeri
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - C Motta
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - M Scalia
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - C Satriano
- Department of Chemical Sciences, School of Medicine, University of Catania, Catania, Italy
| | - S La Vignera
- Department of Clinical and Experimental Medicine, School of Medicine, University of Catania, Catania, Italy
| | - N Burrello
- Department of Clinical and Experimental Medicine, School of Medicine, University of Catania, Catania, Italy
| | - N Caporarello
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - G Lupo
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - A E Calogero
- Department of Clinical and Experimental Medicine, School of Medicine, University of Catania, Catania, Italy
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43
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Tourmente M, Roldan ERS. Mass-Specific Metabolic Rate Influences Sperm Performance through Energy Production in Mammals. PLoS One 2015; 10:e0138185. [PMID: 26371474 PMCID: PMC4570794 DOI: 10.1371/journal.pone.0138185] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 08/26/2015] [Indexed: 01/10/2023] Open
Abstract
Mass-specific metabolic rate, the rate at which organisms consume energy per gram of body weight, is negatively associated with body size in metazoans. As a consequence, small species have higher cellular metabolic rates and are able to process resources at a faster rate than large species. Since mass-specific metabolic rate has been shown to constrain evolution of sperm traits, and most of the metabolic activity of sperm cells relates to ATP production for sperm motility, we hypothesized that mass-specific metabolic rate could influence sperm energetic metabolism at the cellular level if sperm cells maintain the metabolic rate of organisms that generate them. We compared data on sperm straight-line velocity, mass-specific metabolic rate, and sperm ATP content from 40 mammalian species and found that the mass-specific metabolic rate positively influences sperm swimming velocity by (a) an indirect effect of sperm as the result of an increased sperm length, and (b) a direct effect independent of sperm length. In addition, our analyses show that species with higher mass-specific metabolic rate have higher ATP content per sperm and higher concentration of ATP per μm of sperm length, which are positively associated with sperm velocity. In conclusion, our results suggest that species with high mass-specific metabolic rate have been able to evolve both long and fast sperm. Moreover, independently of its effect on the production of larger sperm, the mass-specific metabolic rate is able to influence sperm velocity by increasing sperm ATP content in mammals.
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Affiliation(s)
- Maximiliano Tourmente
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
| | - Eduardo R. S. Roldan
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales (CSIC), Madrid, Spain
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44
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Chen YC, Pan LC, Lai CW, Chien YS, Wu TH. Silymarin and protein kinase A inhibitor modulate glucose-mediated mouse sperm motility: An in vitro study. Reprod Biol 2015; 15:172-7. [DOI: 10.1016/j.repbio.2015.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 05/07/2015] [Accepted: 06/11/2015] [Indexed: 11/25/2022]
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45
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Ramió-Lluch L, Yeste M, Fernández-Novell JM, Estrada E, Rocha L, Cebrián-Pérez JA, Muiño-Blanco T, Concha II, Ramírez A, Rodríguez-Gil JE. Oligomycin A-induced inhibition of mitochondrial ATP-synthase activity suppresses boar sperm motility and in vitro capacitation achievement without modifying overall sperm energy levels. Reprod Fertil Dev 2015; 26:883-97. [PMID: 25319379 DOI: 10.1071/rd13145] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 06/08/2013] [Indexed: 02/04/2023] Open
Abstract
Incubation of boar spermatozoa in a capacitation medium with oligomycin A, a specific inhibitor of the F0 component of the mitochondrial ATP synthase, induced an immediate and almost complete immobilisation of cells. Oligomycin A also inhibited the ability of spermatozoa to achieve feasible in vitro capacitation (IVC), as measured through IVC-compatible changes in motility patterns, tyrosine phosphorylation levels of the acrosomal p32 protein, membrane fluidity and the ability of spermatozoa to achieve subsequent, progesterone-induced in vitro acrosome exocytosis (IVAE). Both inhibitory effects were caused without changes in the rhythm of O2 consumption, intracellular ATP levels or mitochondrial membrane potential (MMP). IVAE was accompanied by a fast and intense peak in O2 consumption and ATP levels in control spermatozoa. Oligomycin A also inhibited progesterone-induced IVAE as well as the concomitant peaks of O2 consumption and ATP levels. The effect of oligomycin on IVAE was also accompanied by concomitant alterations in the IVAE-induced changes on intracellular Ca(2+) levels and MMP. Our results suggest that the oligomycin A-sensitive mitochondrial ATP-synthase activity is instrumental in the achievement of an adequate boar sperm motion pattern, IVC and IVAE. However, this effect seems not to be linked to changes in the overall maintenance of adequate energy levels in stages other than IVAE.
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Affiliation(s)
- Laura Ramió-Lluch
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Marc Yeste
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Josep M Fernández-Novell
- Department of Biochemistry and Molecular Biology, University of Barcelona, E-08028 Barcelona, Spain
| | - Efrén Estrada
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - Luiz Rocha
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona, Spain
| | - José A Cebrián-Pérez
- Department of Biochemistry and Molecular and Cell Biology, I. U. C. A., School of Veterinary Medicine, University of Zaragoza, E-50013 Zaragoza, Spain
| | - Teresa Muiño-Blanco
- Department of Biochemistry and Molecular and Cell Biology, I. U. C. A., School of Veterinary Medicine, University of Zaragoza, E-50013 Zaragoza, Spain
| | - Ilona I Concha
- Institute of Biochemistry and Microbiology and Institute of Animal Science, Universidad Austral de Chile, Independencia 641, Valdivia, Chile
| | - Alfredo Ramírez
- Institute of Biochemistry and Microbiology and Institute of Animal Science, Universidad Austral de Chile, Independencia 641, Valdivia, Chile
| | - Joan E Rodríguez-Gil
- Department of Animal Medicine and Surgery, School of Veterinary Medicine, Autonomous University of Barcelona, E-08193 Bellaterra, Barcelona, Spain
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46
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Effect of diluent composition on the dynamics of sperm DNA fragmentation and other sperm quality parameters in ram during incubation at 37°C. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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47
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Tourmente M, Villar-Moya P, Varea-Sánchez M, Luque-Larena JJ, Rial E, Roldan ERS. Performance of Rodent Spermatozoa Over Time Is Enhanced by Increased ATP Concentrations: The Role of Sperm Competition. Biol Reprod 2015; 93:64. [PMID: 26157072 DOI: 10.1095/biolreprod.114.127621] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 07/06/2015] [Indexed: 12/22/2022] Open
Abstract
Sperm viability, acrosome integrity, motility, and swimming velocity are determinants of male fertility and exhibit an extreme degree of variation among closely related species. Many of these sperm parameters are associated with sperm ATP content, which has led to predictions of trade-offs between ATP content and sperm motility and velocity. Selective pressures imposed by sperm competition have been proposed as evolutionary causes of this pattern of diversity in sperm traits. Here, we examine variation in sperm viability, acrosome integrity, motility, swimming velocity, and ATP content over time, among 18 species of closely related muroid rodents, to address the following questions: (a) Do sperm from closely related species vary in ATP content after a period of incubation? (b) Are these differences in ATP levels related to differences in other sperm traits? (c) Are differences in ATP content and sperm performance over time explained by the levels of sperm competition in these species? Our results revealed a high degree of interspecific variability in changes in sperm ATP content, acrosome integrity, sperm motility and swimming velocity over time. Additionally, species with high sperm competition levels were able to maintain higher levels of sperm motility and faster sperm swimming velocity when they were incubated under conditions that support sperm survival. Furthermore, we show that the maintenance of such levels of sperm performance is correlated with the ability of sperm to sustain high concentrations of intracellular ATP over time. Thus, sperm competition may have an important role maximizing sperm metabolism and performance and, ultimately, the fertilizing capacity of spermatozoa.
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Affiliation(s)
- Maximiliano Tourmente
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales - Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Pilar Villar-Moya
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales - Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - María Varea-Sánchez
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales - Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Juan J Luque-Larena
- Departamento de Ciencias Agroforestales, Universidad de Valladolid, Palencia, Spain
| | - Eduardo Rial
- Department of Cellular and Molecular Medicine, Centro de Investigaciones Biológicas - Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Eduardo R S Roldan
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales - Consejo Superior de Investigaciones Científicas, Madrid, Spain
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48
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Portela JMD, Tavares RS, Mota PC, Ramalho-Santos J, Amaral S. High glucose concentrations per se do not adversely affect human sperm function in vitro. Reproduction 2015; 150:77-84. [DOI: 10.1530/rep-15-0100] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 04/29/2015] [Indexed: 11/08/2022]
Abstract
Diabetes mellitus (DM) represents one of the greatest concerns to global health and it is associated with diverse clinical complications, including reproductive dysfunction. Given the multifactorial nature of DM, the mechanisms that underlie reproductive dysfunction remain unclear. Considering that hyperglycemia has been described as a major effector of the disease pathophysiology, we used anin vitroapproach to address the isolated effect of high glucose conditions on human sperm function, thus avoiding otherin vivoconfounding players. We performed a complete and integrated analysis by measuring a variety of important indicators of spermatozoa functionality (such as motility, viability, capacitation status, acrosomal integrity, mitochondrial superoxide production and membrane potential) in human sperm samples after incubation withd- andl-glucose (5, 25, or 50 mM) for 24 and 48 h. No direct effects promoted by 25 or 50 mMd-glucose were found for any of the parameters assessed (P>0.05), except for the acrosome reaction, which was potentiated after 48 h of exposure to 50 mMd-glucose (P<0.05). Interestingly, non-metabolizablel-glucose drastically increased superoxide production (P<0.05) and suppressed sperm motility (P<0.05) and capacitation (P<0.05) after 24 h of treatment, whereas mitochondrial membrane potential (P<0.05), acrosomal integrity (P<0.01) and viability (P<0.05) were later decreased. The overall results suggest that high glucose levelsper sedo not influence human sperm functionin vitro, which stresses the importance of other factors involved in DM pathology. Nevertheless, the absence of metabolizable glucose contributes to a severe impairment of sperm function and thus compromises male fertility.Free Portuguese abstract: A Portuguese translation of this abstract is freely available athttp://www.reproduction-online.org/content/150/1/77/suppl/DC1.
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49
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Tourmente M, Villar-Moya P, Rial E, Roldan ERS. Differences in ATP Generation Via Glycolysis and Oxidative Phosphorylation and Relationships with Sperm Motility in Mouse Species. J Biol Chem 2015; 290:20613-26. [PMID: 26048989 DOI: 10.1074/jbc.m115.664813] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Indexed: 12/20/2022] Open
Abstract
Mouse sperm produce enough ATP to sustain motility by anaerobic glycolysis and respiration. However, previous studies indicated that an active glycolytic pathway is required to achieve normal sperm function and identified glycolysis as the main source of ATP to fuel the motility of mouse sperm. All the available evidence has been gathered from the studies performed using the laboratory mouse. However, comparative studies of closely related mouse species have revealed a wide range of variation in sperm motility and ATP production and that the laboratory mouse has comparatively low values in these traits. In this study, we compared the relative reliance on the usage of glycolysis or oxidative phosphorylation as ATP sources for sperm motility between mouse species that exhibit significantly different sperm performance parameters. We found that the sperm of species with higher oxygen consumption/lactate excretion rate ratios were able to produce higher amounts of ATP, achieving higher swimming velocities. Additionally, we show that the species with higher respiration/glycolysis ratios have a higher degree of dependence upon active oxidative phosphorylation. Moreover, we characterize for the first time two mouse species in which sperm depend on functional oxidative phosphorylation to achieve normal performance. Finally, we discuss that sexual selection could promote adaptations in sperm energetic metabolism tending to increase the usage of a more efficient pathway for the generation of ATP (and faster sperm).
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Affiliation(s)
- Maximiliano Tourmente
- From the Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales (Consejo Superior de Investigaciones Científicas), 28006 Madrid and
| | - Pilar Villar-Moya
- From the Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales (Consejo Superior de Investigaciones Científicas), 28006 Madrid and
| | - Eduardo Rial
- the Mitochondrial Bioenergetics Research Group, Centro de Investigaciones Biológicas (Consejo Superior de Investigaciones Científicas), 28040 Madrid, Spain
| | - Eduardo R S Roldan
- From the Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales (Consejo Superior de Investigaciones Científicas), 28006 Madrid and
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50
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Légaré C, Droit A, Fournier F, Bourassa S, Force A, Cloutier F, Tremblay R, Sullivan R. Investigation of male infertility using quantitative comparative proteomics. J Proteome Res 2014; 13:5403-14. [PMID: 25355644 DOI: 10.1021/pr501031x] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Male factors account for 40% of infertility cases. The identification of differentially expressed proteins on spermatozoa from fertile and infertile men can help in the elucidation of the molecular basis of male infertility. The aim of this study was to compare sperm proteomes from 3 different groups: fertile men, normozoospermic men consulting for infertility, and normozoospermic men with an impaired capacity for fertilization (IVF-failure). We used differential proteomics with isobaric tags for relative and absolute quantitation (iTRAQ) labeling, and LC-MS analysis to identify proteins that are differentially expressed. A total of 348 unique proteins were identified and quantified. The analysis identified 33 proteins that were differentially expressed in the IVF-failure group vs the fertile group. Comparison of the infertile and fertile groups revealed that 18 proteins appeared to be differentially expressed. Four proteins were similarly altered in the IVF-failure and infertile groups: semenogelin 1 (SEMG1), prolactin-induced protein (PIP), glyceraldehyde-3-phosphate dehydrogenase (GAPDHS), and phosphoglycerate kinase 2 (PGK2). These protein markers were selected for validation using multiple reactions monitoring mass spectrometry (MRM-MS) and further confirmed by Western blot analysis. Overall, these results suggest that a panel of proteins may be used as biomarkers for future studies of infertility.
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Affiliation(s)
- Christine Légaré
- Département Obstétrique, Gynécologie et Reproduction and ‡Département Médecine Moléculaire, Centre de Recherche, Centre Hospitalier Universitaire de Québec , Quebec City, Quebec, Canada G1V 4G2
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