1
|
Integrative Application of Transcriptomics and Metabolomics Provides Insights into Unsynchronized Growth in Sea Cucumber ( Stichopus monotuberculatus). Int J Mol Sci 2022; 23:ijms232415478. [PMID: 36555118 PMCID: PMC9779819 DOI: 10.3390/ijms232415478] [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: 11/03/2022] [Revised: 11/28/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022] Open
Abstract
Ever-increasing consumer demand for sea cucumbers mainly leads to huge damage to wild sea cucumber resources, including Stichopus monotuberculatus, which in turn exerts negative impacts on marine environments due to the lack of ecological functions performed by sea cucumbers. Aquaculture of sea cucumbers is an effective way to meet consumer demand and restore their resources. Unsynchronous growth is a prominent problem in the aquaculture of sea cucumbers which has concealed unelucidated molecular mechanisms until now. In this study, we carried out an integrative analysis of transcriptomics and metabolomics on fast-growing (SMF) and slow-growing (SMS) groups of S. monotuberculatus cultured in the same environmental conditions. The results revealed that a total of 2054 significantly differentially expressed genes (DEGs) were identified, which are mainly involved in fat digestion and absorption, histidine metabolism, arachidonic acid metabolism, and glutathione metabolism. 368 differential metabolites (DMs) were screened out between the SMF group and the SMS group; these metabolites are mainly involved in glycerophospholipid metabolism, purine metabolism, biosynthesis of unsaturated fatty acids, pyrimidine metabolism, arachidonic acid metabolism, and other metabolic pathways. The integrative analysis of transcriptomics and metabolomics of S. monotuberculatus suggested that the SMF group had a higher capacity for lipid metabolism and protein synthesis, and had a more frequent occurrence of apoptosis events, which are likely to be related to coping with environmental stresses. The results of this study provide potential values for the aquaculture of sea cucumbers which may promote their resource enhancement.
Collapse
|
2
|
Gramajo-Bühler MC, Zelarayán L, Sánchez-Toranzo G. Involvement of Protein cAMP-dependent Kinase, Phospholipase A2 and Phospholipase C in Sperm Acrosome Reaction of Chinchilla lanigera. Reprod Domest Anim 2015; 51:150-7. [PMID: 26699205 DOI: 10.1111/rda.12659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 11/18/2015] [Indexed: 11/30/2022]
Abstract
The mechanisms involved in fertilization are the centre of attention in order to determine the conditions required to reproduce in vitro the events that take place in vivo, with special interest in endangered species. Previous data from mouse sperm, where acrosome reaction (AR) occurs more often in the interstitium of the cumulus oophorus, contribute to strengthen the use of progesterone as a physiological inducer of this process. We studied the participation of protein kinase A (PKA), phospholipases A2 and C (PLA2 , PLC) in the AR induced by progesterone from Chinchilla epididymal spermatozoa. The addition of db-cAMP to the incubation medium caused an increase of 58% in the AR, while the use of H89 (30 μm), a PKA inhibitor, reflected a decrease of 40% in the percentage of reacted gametes. The assays conducted with arachidonic acid showed a maximum increase of 23% in the AR. When gametes were pre-incubated with PLA2 inhibitors, a dose-dependent inhibitory effect was observed. The addition of phorbol12-myristate13-acetate (10 μm) revealed higher percentages of AR induction (60%). When PLC was inhibited with neomycin and U73122, a dose-dependent decrease in AR percentages was observed. Combined inhibition of PKA, PLA2 and PLC, AR values similar to control were obtained. This work shows evidence, for the first time in Chinchilla, that progesterone activates the AC/cAMP/PKA system as well as sperm phospholipases and that these signalling pathways participate jointly and cooperatively in AR. These results contribute to the understanding of the complex regulation that is triggered in sperm after the effect of progesterone.
Collapse
Affiliation(s)
- M C Gramajo-Bühler
- Department of Developmental Biology, Higher Institute for Biological Research, San Miguel de Tucumán, Argentina
| | - L Zelarayán
- Faculty of biochemistry, chemistry and Pharmacy, Institute of Biology 'Dr. Francisco Barbieri', National University of Tucumán, San Miguel de Tucumán, Argentina
| | - G Sánchez-Toranzo
- Faculty of biochemistry, chemistry and Pharmacy, Institute of Biology 'Dr. Francisco Barbieri', National University of Tucumán, San Miguel de Tucumán, Argentina
| |
Collapse
|
3
|
Abi Nahed R, Martinez G, Escoffier J, Yassine S, Karaouzène T, Hograindleur JP, Turk J, Kokotos G, Ray PF, Bottari S, Lambeau G, Hennebicq S, Arnoult C. Progesterone-induced Acrosome Exocytosis Requires Sequential Involvement of Calcium-independent Phospholipase A2β (iPLA2β) and Group X Secreted Phospholipase A2 (sPLA2). J Biol Chem 2015; 291:3076-89. [PMID: 26655718 DOI: 10.1074/jbc.m115.677799] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Indexed: 11/06/2022] Open
Abstract
Phospholipase A2 (PLA2) activity has been shown to be involved in the sperm acrosome reaction (AR), but the molecular identity of PLA2 isoforms has remained elusive. Here, we have tested the role of two intracellular (iPLA2β and cytosolic PLA2α) and one secreted (group X) PLA2s in spontaneous and progesterone (P4)-induced AR by using a set of specific inhibitors and knock-out mice. iPLA2β is critical for spontaneous AR, whereas both iPLA2β and group X secreted PLA2 are involved in P4-induced AR. Cytosolic PLA2α is dispensable in both types of AR. P4-induced AR spreads over 30 min in the mouse, and kinetic analyses suggest the presence of different sperm subpopulations, using distinct PLA2 pathways to achieve AR. At low P4 concentration (2 μm), sperm undergoing early AR (0-5 min post-P4) rely on iPLA2β, whereas sperm undergoing late AR (20-30 min post-P4) rely on group X secreted PLA2. Moreover, the role of PLA2s in AR depends on P4 concentration, with the PLA2s being key actors at low physiological P4 concentrations (≤2 μm) but not at higher P4 concentrations (~10 μm).
Collapse
Affiliation(s)
- Roland Abi Nahed
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - Guillaume Martinez
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - Jessica Escoffier
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - Sandra Yassine
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - Thomas Karaouzène
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - Jean-Pascal Hograindleur
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France
| | - John Turk
- the Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, Missouri 63110
| | - George Kokotos
- the Department of Chemistry, University of Athens, Panepistimiopolis, Athens 15771, Greece
| | - Pierre F Ray
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France, the Centre Hospitalier Universitaire de Grenoble, Unité Fonctionnelle de Biochimie et Génétique Moléculaire, Grenoble F-38000, France
| | - Serge Bottari
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France, the Centre Hospitalier Universitaire de Grenoble, Plate-forme de Radioanalyse, IBP, CS10217, Grenoble F-38000, France
| | - Gérard Lambeau
- the Université de Nice-Sophia Antipolis, Valbonne 06560, France, the Centre Hospitalier Universitaire de Grenoble, Centre d'AMP-CECOS, CS1021, Grenoble F-38000, France
| | - Sylviane Hennebicq
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France, the Centre Hospitalier Universitaire de Grenoble, Centre d'AMP-CECOS, CS1021, Grenoble F-38000, France
| | - Christophe Arnoult
- From the Université Grenoble Alpes, F-38000 Grenoble, France, the Institut Albert Bonniot, INSERM U823, La Tronche F-38700, France,
| |
Collapse
|
4
|
Gómez-Torres MJ, García EM, Guerrero J, Medina S, Izquierdo-Rico MJ, Gil-Izquierdo Á, Orduna J, Savirón M, González-Brusi L, Ten J, Bernabeu R, Avilés M. Metabolites involved in cellular communication among human cumulus-oocyte-complex and sperm during in vitro fertilization. Reprod Biol Endocrinol 2015; 13:123. [PMID: 26553294 PMCID: PMC4640411 DOI: 10.1186/s12958-015-0118-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 10/22/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Fertilization is a key physiological process for the preservation of the species. Consequently, different mechanisms affecting the sperm and the oocyte have been developed to ensure a successful fertilization. Thus, sperm acrosome reaction is necessary for the egg coat penetration and sperm-oolema fusion. Several molecules are able to induce the sperm acrosome reaction; however, this process should be produced coordinately in time and in the space to allow the success of fertilization between gametes. The goal of this study was to analyze the metabolites secreted by cumulus-oocyte-complex (COC) to find out new components that could contribute to the induction of the human sperm acrosome reaction and other physiological processes at the time of gamete interaction and fertilization. METHODS For the metabolomic analysis, eighteen aliquots of medium were used in each group, containing: a) only COC before insemination and after 3 h of incubation; b) COC and capacitated spermatozoa after insemination and incubated for 16-20 hours; c) only capacitated sperm after 16-20 h in culture and d) only fertilization medium as control. Six patients undergoing assisted reproduction whose male partners provided normozoospermic samples were included in the study. Seventy-two COC were inseminated. RESULTS The metabolites identified were monoacylglycerol (MAG), lysophosphatidylcholine (LPC) and phytosphingosine (PHS). Analysis by PCR and in silico of the gene expression strongly suggests that the cumulus cells contribute to the formation of the PHS and LPC. CONCLUSIONS LPC and PHS are secreted by cumulus cells during in vitro fertilization and they could be involved in the induction of human acrosome reaction (AR). The identification of new molecules with a paracrine effect on oocytes, cumulus cells and spermatozoa will provide a better understanding of gamete interaction.
Collapse
Affiliation(s)
- María José Gómez-Torres
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain.
| | - Eva María García
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Jaime Guerrero
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Sonia Medina
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Food Science and Technology Department, CEBAS-CSIC, Espinardo (Murcia), Spain
| | - María José Izquierdo-Rico
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
| | - Ángel Gil-Izquierdo
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Food Science and Technology Department, CEBAS-CSIC, Espinardo (Murcia), Spain
| | - Jesús Orduna
- Institute of Materials Science of Aragon, CSIC-University of Zaragoza, 50009, Zaragoza, Spain
| | - María Savirón
- Institute of Materials Science of Aragon, CSIC-University of Zaragoza, 50009, Zaragoza, Spain
| | - Leopoldo González-Brusi
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
| | - Jorge Ten
- Department of Biotechnology, University of Alicante, 99, Carretera de San Vicente s/n, Alicante, 03016, Spain
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Rafael Bernabeu
- Instituto Bernabeu of Fertility and Gynecology, Alicante, 03016, Spain
| | - Manuel Avilés
- Department of Cell Biology and Histology, Faculty of Medicine, University of Murcia, Campus Mare Nostrum, Espinardo 30100 and IMIB, Murcia, Spain
| |
Collapse
|
5
|
Multiple roles for the actin cytoskeleton during regulated exocytosis. Cell Mol Life Sci 2012; 70:2099-121. [PMID: 22986507 DOI: 10.1007/s00018-012-1156-5] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/28/2012] [Accepted: 08/30/2012] [Indexed: 01/01/2023]
Abstract
Regulated exocytosis is the main mechanism utilized by specialized secretory cells to deliver molecules to the cell surface by virtue of membranous containers (i.e., secretory vesicles). The process involves a series of highly coordinated and sequential steps, which include the biogenesis of the vesicles, their delivery to the cell periphery, their fusion with the plasma membrane, and the release of their content into the extracellular space. Each of these steps is regulated by the actin cytoskeleton. In this review, we summarize the current knowledge regarding the involvement of actin and its associated molecules during each of the exocytic steps in vertebrates, and suggest that the overall role of the actin cytoskeleton during regulated exocytosis is linked to the architecture and the physiology of the secretory cells under examination. Specifically, in neurons, neuroendocrine, endocrine, and hematopoietic cells, which contain small secretory vesicles that undergo rapid exocytosis (on the order of milliseconds), the actin cytoskeleton plays a role in pre-fusion events, where it acts primarily as a functional barrier and facilitates docking. In exocrine and other secretory cells, which contain large secretory vesicles that undergo slow exocytosis (seconds to minutes), the actin cytoskeleton plays a role in post-fusion events, where it regulates the dynamics of the fusion pore, facilitates the integration of the vesicles into the plasma membrane, provides structural support, and promotes the expulsion of large cargo molecules.
Collapse
|
6
|
Progesterone attenuates demyelination and microglial reaction in the lysolecithin-injured spinal cord. Neuroscience 2011; 192:588-97. [PMID: 21736923 DOI: 10.1016/j.neuroscience.2011.06.065] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 05/27/2011] [Accepted: 06/23/2011] [Indexed: 12/14/2022]
Abstract
Progesterone treatment of mice with experimental autoimmune encephalomyelitis has shown beneficial effects in the spinal cord according to enhanced clinical, myelin and neuronal-related parameters. In the present work, we report progesterone effects in a model of primary demyelination induced by the intraspinal injection of lysophospatidylcholine (LPC). C57Bl6 adult male mice remained steroid-untreated or received a single 100 mg progesterone implant, which increased circulating steroid levels to those of mouse pregnancy. Seven days afterwards mice received a single injection of 1% LPC into the dorsal funiculus of the spinal cord. A week after, anesthetized mice were perfused and paraffin embedded sections of the spinal cord stained for total myelin using Luxol Fast Blue (LFB) histochemistry, for myelin basic protein (MBP) immunohistochemistry and for determination of OX-42+ microglia/macrophages. Cryostat sections were also prepared and stained for oligodendrocyte precursors (NG2+ cells) and mature oligodendrocytes (CC1+ cells). A third batch of spinal cords was prepared for analysis of the microglial marker CD11b mRNA using qPCR. Results showed that progesterone pretreatment of LPC-injected mice decreased by 50% the area of demyelination, evaluated by either LFB staining or MBP immunostaining, increased the density of NG2+ cells and of mature, CC1+ oligodendrocytes and decreased the number of OX-42+ cells, respect of steroid-untreated LPC mice. CD11b mRNA was hyperexpressed in LPC-treated mice, but significantly reduced in LPC-mice receiving progesterone. These results indicated that progesterone antagonized LPC injury, an effect involving (a) increased myelination; (b) stimulation of oligodendrocyte precursors and mature oligodendrocytes, and (c) attenuation of the microglial/macrophage response. Thus, use of a focal demyelination model suggests that progesterone exerts promyelinating and anti-inflammatory effects at the spinal cord level.
Collapse
|
7
|
Chiu PCN, Wong BST, Lee CL, Lam KKW, Chung MK, Lee KF, Koistinen R, Koistinen H, Gupta SK, Seppälä M, Yeung WSB. Zona pellucida-induced acrosome reaction in human spermatozoa is potentiated by glycodelin-A via down-regulation of extracellular signal-regulated kinases and up-regulation of zona pellucida-induced calcium influx. Hum Reprod 2010; 25:2721-33. [PMID: 20843776 DOI: 10.1093/humrep/deq243] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Glycodelin-A interacts with spermatozoa before fertilization, but its role in modulating sperm functions is not known. Zona pellucida-induced acrosome reaction is crucial to fertilization and its dysfunction is a cause of male infertility. We hypothesized that glycodelin-A, a glycoprotein found in the female reproductive tract, potentiates human spermatozoa for zona pellucida-induced acrosome reaction. METHODS Glycodelin isoforms were immunoaffinity purified. The sperm intracellular cAMP concentration, protein kinase-A (PKA) and extracellular signal-regulated kinase (ERK) activities, and intracellular calcium were measured by ELISA, kinase activity assay kits and Fluo-4AM technique, respectively. The phosphorylation of inositol 1,4,5-trisphosphate type-1 receptor (IP3R1) mediated by ERK was determined by western blotting. Zona pellucida-induced acrosome reaction was detected by Pisum sativum staining. RESULTS Pretreatment of spermatozoa with glycodelin-A significantly up-regulated adenylyl cyclase/PKA activity and down-regulated the activity of ERK and its phosphorylation of IP3R1, thereby enhancing zona pellucida-induced calcium influx and zona pellucida-induced acrosome reaction. Glycodelin-F or deglycosylated glycodelin-A did not have these actions. Treatment of spermatozoa with a protein kinase inhibitor abolished the priming activity of glycodelin-A, whilst ERK pathway inhibitors mimic the stimulatory effect of glycodelin-A on zona pellucida-induced acrosome reaction. CONCLUSIONS Glycodelin-A in the female reproductive tract sensitizes spermatozoa for zona pellucida-induced acrosome reaction in a glycosylation-specific manner through activation of the adenylyl cyclase/PKA pathway, suppression of extracellular signal-regulated kinase activation and up-regulation of zona pellucida-induced calcium influx. The action of glycodelin-A may be important in vivo to ensure full responsiveness of human spermatozoa to the zona pellucida.
Collapse
Affiliation(s)
- Philip C N Chiu
- Department of Obstetrics and Gynaecology, University of Hong Kong, Pokfulam Road, Hong Kong, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Escoffier J, Jemel I, Tanemoto A, Taketomi Y, Payre C, Coatrieux C, Sato H, Yamamoto K, Masuda S, Pernet-Gallay K, Pierre V, Hara S, Murakami M, De Waard M, Lambeau G, Arnoult C. Group X phospholipase A2 is released during sperm acrosome reaction and controls fertility outcome in mice. J Clin Invest 2010; 120:1415-28. [PMID: 20424324 DOI: 10.1172/jci40494] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 02/10/2010] [Indexed: 11/17/2022] Open
Abstract
Ejaculated mammalian sperm must undergo a maturation process called capacitation before they are able to fertilize an egg. Several studies have suggested a role for members of the secreted phospholipase A2 (sPLA2) family in capacitation, acrosome reaction (AR), and fertilization, but the molecular nature of these enzymes and their specific roles have remained elusive. Here, we have demonstrated that mouse group X sPLA2 (mGX) is the major enzyme present in the acrosome of spermatozoa and that it is released in an active form during capacitation through spontaneous AR. mGX-deficient male mice produced smaller litters than wild-type male siblings when crossed with mGX-deficient females. Further analysis revealed that spermatozoa from mGX-deficient mice exhibited lower rates of spontaneous AR and that this was associated with decreased in vitro fertilization (IVF) efficiency due to a drop in the fertilization potential of the sperm and an increased rate of aborted embryos. Treatment of sperm with sPLA2 inhibitors and antibodies specific for mGX blocked spontaneous AR of wild-type sperm and reduced IVF success. Addition of lysophosphatidylcholine, a catalytic product of mGX, overcame these deficiencies. Finally, recombinant mGX triggered AR and improved IVF outcome. Taken together, our results highlight a paracrine role for mGX during capacitation in which the enzyme primes sperm for efficient fertilization and boosts premature AR of a likely phospholipid-damaged sperm subpopulation to eliminate suboptimal sperm from the pool available for fertilization.
Collapse
|
9
|
Escoffier J, Couvet M, de Pomyers H, Ray PF, Sève M, Lambeau G, De Waard M, Arnoult C. Snake venoms as a source of compounds modulating sperm physiology: Secreted phospholipases A2 from Oxyuranus scutellatus scutellatus impact sperm motility, acrosome reaction and in vitro fertilization in mice. Biochimie 2010; 92:826-36. [PMID: 20226834 DOI: 10.1016/j.biochi.2010.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Accepted: 03/05/2010] [Indexed: 11/19/2022]
Abstract
The goal of this study was to identify new compounds from venoms able to modulate sperm physiology and more particularly sperm motility. For this purpose, we screened the effects of 16 snake venoms cleared of molecules higher than 15 kDa on sperm motility. Venoms rich in neurotoxins like those from Oxyuranus scutellatus scutellatus or Daboia russelii, were highly potent inhibitors of sperm motility. In contrast, venoms rich in myotoxins like those from Echis carinatus, Bothrops alternatus and Macrovipera lebetina, were inactive. From the main pharmacologically-active fraction of the Taipan snake O. scutellatus s., a proteomic approach allowed us to identify 16 different proteins, among which OS1 and OS2, two secreted phospholipases A2 (sPLA(2)). Purified OS1 and OS2 mimicked the inhibitory effect on sperm motility and were likely responsible for the inhibitory effect of the active fraction. OS1 and OS2 triggered sperm acrosome reaction and induced lipid rearrangements of the plasma membrane. The catalytic activity of OS2 was required to modulate sperm physiology since catalytically inactive mutants had no effect. Finally, sperm treated with OS2 were less competent than control sperm to initiate in vitro normal embryo development. This is the first report characterizing sPLA(2) toxins that modulate in vitro sperm physiology.
Collapse
|
10
|
Abstract
A block to polyspermy is required for successful fertilisation and embryo survival in mammals. A higher incidence of polyspermy is observed during in vitro fertilisation (IVF) compared with the in vivo situation in several species. Two groups of mechanisms have traditionally been proposed as contributing to the block to polyspermy in mammals: oviduct-based mechanisms, avoiding a massive arrival of spermatozoa in the proximity of the oocyte, and egg-based mechanisms, including changes in the membrane and zona pellucida (ZP) in reaction to the fertilising sperm. Additionally, a mechanism has been described recently which involves modifications of the ZP in the oviduct before the oocyte interacts with spermatozoa, termed "pre-fertilisation zona pellucida hardening". This mechanism is mediated by the oviductal-specific glycoprotein (OVGP1) secreted by the oviductal epithelial cells around the time of ovulation, and is reinforced by heparin-like glycosaminoglycans (S-GAGs) present in oviductal fluid. Identification of the molecules contributing to the ZP modifications in the oviduct will improve our knowledge of the mechanisms of sperm-egg interaction and could help to increase the success of IVF systems in domestic animals and humans.
Collapse
Affiliation(s)
- Pilar Coy
- Department of Physiology, Faculty of Veterinary, University of Murcia, Spain.
| | | |
Collapse
|
11
|
Brewis IA, Van Gestel RA, Gadella BM, Jones R, Publicover SJ, Roldan ERS, Frayne J, Barratt CLR. The spermatozoon at fertilisation: Current understanding and future research directions. HUM FERTIL 2009; 8:241-51. [PMID: 16393824 DOI: 10.1080/14647270500420160] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ian A Brewis
- Biostatistics and Bioinformatics Unit & Department of Medical Biochemistry and Immunology, School of Medicine, Cardiff University, Cardiff, UK.
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Ni Y, Zhou Y, Chen WY, Zheng M, Yu J, Li C, Zhang Y, Shi QX. HongrES1, a cauda epididymis-specific protein, is involved in capacitation of guinea pig sperm. Mol Reprod Dev 2009; 76:984-93. [DOI: 10.1002/mrd.21063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
13
|
Signal transduction pathways that regulate sperm capacitation and the acrosome reaction. Arch Biochem Biophys 2009; 485:72-81. [DOI: 10.1016/j.abb.2009.02.003] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 02/06/2009] [Accepted: 02/07/2009] [Indexed: 01/28/2023]
|
14
|
Muratori M, Luconi M, Marchiani S, Forti G, Baldi E. Molecular markers of human sperm functions. ACTA ACUST UNITED AC 2009; 32:25-45. [DOI: 10.1111/j.1365-2605.2008.00875.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|