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https://www.readbyqxmd.com/read/28911209/intracellular-activation-of-ovastacin-mediates-pre-fertilization-hardening-of-the-zona-pellucida
#1
Hagen Körschgen, Michael Kuske, Konstantin Karmilin, Irene Yiallouros, Melanie Balbach, Julia Floehr, Dagmar Wachten, Willi Jahnen-Dechent, Walter Stöcker
STUDY QUESTION: How and where is pro-ovastacin activated and how does active ovastacin regulate zona pellucida hardening (ZPH) and successful fertilization? STUDY FINDING: Ovastacin is partially active before exocytosis and pre-hardens the zona pellucida (ZP) before fertilization. WHAT IS KNOWN ALREADY: The metalloproteinase ovastacin is stored in cortical granules, it cleaves zona pellucida protein 2 (ZP2) upon fertilization and thereby destroys the ZP sperm ligand and triggers ZPH...
September 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28892594/male-infertility-the-other-side-of-the-equation
#2
Darren J Katz, Patrick Teloken, Ohad Shoshany
BACKGROUND: A male factor contributes to infertility in approximately 50% of couples who fail to conceive, causing significant psychosocial and marital stress. OBJECTIVE: This article reviews the general practitioner's (GP's) evaluation of male infertility and indications for referral to a male infertility specialist, and gives an overview of the specialist management of male infertility. DISCUSSION: Male infertility can result from anatomical or genetic abnormalities, systemic or neurological diseases, infections, trauma, iatrogenic injury, gonadotoxins and development of sperm antibodies...
September 2017: Australian Family Physician
https://www.readbyqxmd.com/read/28891297/validating-missing-proteins-in-human-sperm-cells-by-targeted-mass-spectrometry-and-antibody-based-methods
#3
Christine Carapito, Paula Duek, Charlotte Macron, Marine Seffals, Karine Rondel, Francois Delalande, Cecilia Lindskog, Thomas Freour, Yves Vandenbrouck, Lydie Lane, Charles Pineau
The present study is a contribution to the "neXt50 challenge", a coordinated effort across C-HPP teams to identify the 50 most tractable missing proteins (MPs) on each chromosome. We report the targeted search of 38 theoretically detectable MPs from chromosomes 2 and 14 in Triton X-100 soluble and insoluble sperm fractions from a total of 15 healthy donors. A targeted mass spectrometry-based strategy consisting in the development of LC-PRM assays (with heavy labeled synthetic peptides) targeting 92 proteotypic peptides of the 38 selected MPs was used...
September 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28868245/isolation-culture-and-characterization-of-human-sertoli-cells-by-flow-cytometry-development-of-procedure
#4
Mohammad Reza Lakpour, Samaneh Aghajanpour, Morteza Koruji, Abdolhossein Shahverdi, Mohammad Ali Sadighi-Gilani, Marjan Sabbaghian, Reza Aflatoonian, Majid Rajabian-Naghandar
BACKGROUND: The sertoli cells in the testis create unique and safe environment to protect seminiferous tubules from auto antigens and invading pathogens. These cells produce the survival factor of the blood-testis barrier and produce special materials such as androgen binding proteins and contribute to the coordinated action of spermatogenesis. Given that the sertoli cells play an essential role in spermatogenesis and the lack of these cells leads to the disruption of spermatogenesis, it is necessary to investigate the behavior and performance of these cells...
April 2017: Journal of Reproduction & Infertility
https://www.readbyqxmd.com/read/28854753/proteomic-identification-of-turkey-meleagris-gallopavo-seminal-plasma-proteins
#5
M Slowinska, J Nynca, G J Arnold, T Fröhlich, J Jankowski, K Kozlowski, A Mostek, A Ciereszko
SDS-PAGE combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) and 2-dimensional electrophoresis (2DE) combined with matrix-assisted laser desorption/ionization time of flight/time of flight mass spectrometry (MALDI TOF/TOF) were applied to characterize the turkey seminal plasma proteome. LC-MS/MS led to the identification of 175 proteins, which were classified according to their function and to corresponding biochemical pathways. Using 2DE and MALDI TOF/TOF, 34 different turkey seminal plasma proteins could be identified, of which 20 were found in more than one spot, indicating different proteoforms of these proteins...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28841339/the-influence-of-semen-quality-on-male-pronucleus-demethylation-process-during-icsi-cycle
#6
Hoda Rajabi, Homa Mohseni-Kouchesfehani, Mohammad Salehi, Fattaneh Farifteh-Nobijari, Tarlan Eslami-Arshaghi
There is growing evidence that the spermatozoon's epigenetic structure is of the utmost importance in the health of the future embryo. Following fertilization, sperm chromatin undergoes epigenetic reprogramming including DNA demethylation and remethylation, which resets gene expression. In some infertile patients, it is inevitable that sperm cells that are not within the range of normal human sperm parameters will be used for intracytoplasmic sperm injection. Understanding the relationship between the human sperm parameters and male pronucleus DNA demethylation seems necessary...
August 25, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28806153/expression-purification-and-refolding-of-human-lipocalin-6-and-production-of-a-monoclonal-antibody-against-this-protein
#7
Jiong Chen, Wei Feng, Yue Zhao, Yaqin Li, Fei Zhan
Human lipocalin 6 (hLCN6) is a member of the lipocalin family, which is a group of structurally conserved hydrophobic ligand binding proteins, and widely distributed in animal, plant, and bacteria. Specific expression of hLCN6 in the epididymis and localization of this protein on the surface of spermatozoa suggest a role played by hLCN6, which may function as a transporter to carry ligands in the epididymal channel. However, the role of hLCN6 in sperm maturation has been largely unknown due to the lack of effective antibodies...
August 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/28804023/association-of-serum-autoantibodies-with-pregnancy-outcome-of-patients-undergoing-first-ivf-icsi-treatment-a-prospective-cohort-study
#8
Xian Chen, Mei-Lan Mo, Chun-Yu Huang, Liang-Hui Diao, Guan-Gui Li, Yu-Ye Li, Aaron Lerner, Yehuda Shoenfeld, Yong Zeng
The relevance of antiphospholipid (aPL), antinuclear (ANA) or antithyroid (ATA) antibodies in women undergoing in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) are controversial. The present study aims to investigate which autoantibodies are associated with the pregnancy outcome of patients undergoing first IVF/ICSI treatment. A total of 3763 IVF/ICSI patients were recruited from January to December 2015. Forty-five patients positive for aPL presenting adverse outcomes in their first cycle received low-dose aspirin treatment before the second transfer...
August 3, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28746190/vasa-mrna-ddx4-detection-is-more-specific-than-immunohistochemistry-using-poly-or-monoclonal-antibodies-for-germ-cells-in-the-male-urogenital-tract
#9
Willem P A Boellaard, Hans Stoop, Ad J M Gillis, J Wolter Oosterhuis, Leendert H J Looijenga
VASA, also known as DDX4, is reported to be specifically expressed in cells belonging to the germ cell lineage, both in males and females. Therefore, it could be an informative protein biomarker to be applied on semen to differentiate between obstructive and nonobstructive azoospermia (OA and NOA, respectively). In addition, it could be of value to predict sperm retrieval based on testicular sperm extraction. Immunocytochemistry of proven OA semen using both polyclonal and monoclonal antibodies against VASA showed positive staining of both cells and cell sized particles...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28742876/expression-of-uncharacterized-male-germ-cell-specific-genes-and-discovery-of-novel-sperm-tail-proteins-in-mice
#10
Jun Tae Kwon, Sera Ham, Suyeon Jeon, Youil Kim, Seungmin Oh, Chunghee Cho
The identification and characterization of germ cell-specific genes are essential if we hope to comprehensively understand the mechanisms of spermatogenesis and fertilization. Here, we searched the mouse UniGene databases and identified 13 novel genes as being putatively testis-specific or -predominant. Our in silico and in vitro analyses revealed that the expressions of these genes are testis- and germ cell-specific, and that they are regulated in a stage-specific manner during spermatogenesis. We generated antibodies against the proteins encoded by seven of the genes to facilitate their characterization in male germ cells...
2017: PloS One
https://www.readbyqxmd.com/read/28732140/fibroblast-growth-factor-2-fgf2-is-present-in-human-spermatozoa-and-is-related-with-sperm-motility-the-use-of-recombinant-fgf2-to-improve-motile-sperm-recovery
#11
D J Garbarino Azúa, L Saucedo, S Giordana, M L Magri, M G Buffone, F Neuspiller, M H Vazquez-Levin, C I Marín-Briggiler
Fibroblast growth factors (FGFs) and their receptors (FGFRs) regulate several functions of somatic cells. In a previous work, we reported FGFR expression in human spermatozoa and their involvement in motility. This study aimed to evaluate the presence and localization of fibroblast growth factor 2 (FGF2) in human spermatozoa, to determine the relationship of FGF2 levels with conventional semen parameters and to assess the effect of recombinant FGF2 (rFGF2) on sperm recovery in a selection procedure. Western immunoblotting analysis using an antibody against FGF2 revealed an 18-kDa band in sperm protein extracts...
September 2017: Andrology
https://www.readbyqxmd.com/read/28701237/flow-cytometric-sex-sorting-affects-cd4-membrane-distribution-and-binding-of-exogenous-dna-on-bovine-sperm-cells
#12
William Borges Domingues, Tony Leandro Rezende da Silveira, Eliza Rossi Komninou, Leonardo Garcia Monte, Mariana Härter Remião, Odir Antônio Dellagostin, Carine Dahl Corcini, Antônio Sergio Varela Junior, Fabiana Kömmling Seixas, Tiago Collares, Vinicius Farias Campos
Bovine sex-sorted sperm have been commercialized and successfully used for the production of transgenic embryos of the desired sex through the sperm-mediated gene transfer (SMGT) technique. However, sex-sorted sperm show a reduced ability to internalize exogenous DNA. The interaction between sperm cells and the exogenous DNA has been reported in other species to be a CD4-like molecule-dependent process. The flow cytometry-based sex-sorting process subjects the spermatozoa to different stresses causing changes in the cell membrane...
July 13, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28697346/-necrozoospermia-from-etiologic-diagnosis-to-therapeutic-management
#13
A Dumont, A-L Barbotin, V Lefebvre-Khalil, V Mitchell, J-M Rigot, F Boitrelle, G Robin
This review describes necrospermia, its diagnosis, causes and management. Sperm vitality is commonly assessed in the laboratory of reproductive biology, with the eosin test or with the hypo-osmotic swelling test. Necrospermia is defined by a percentage of living spermatozoa inferior to 58%, and can be related to male infertility. Several pathological mechanisms may be involved and can be classified either in testicular causes (hyperthyroidism, local hyperthermia, varicocele), or post-testicular causes (epididymal necrospermia, dysregulation of seminal plasma, adult polycystic kidney disease, vasectomy reversal, anti-sperm antibodies) or both (infection, toxic, age, spinal cord injury)...
April 2017: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/28662655/identification-characterization-and-purification-of-porcine-quiescin-q6-sulfydryl-oxidase-2-protein
#14
Yu-Wen Kuo, Radhika Joshi, Tse-En Wang, Hui-Wen Chang, Sheng-Hsiang Li, Chun-Ni Hsiao, Pei-Shiue Jason Tsai
BACKGROUND: Post-spermiogenesis membrane surface modifications rely on molecules present in the reproductive tracts. Two isoforms (isoform 1 and 2) from Quiescin Q6-Sulfydryl Oxidase protein family have been identified in the male reproductive tract of rodent species. However, unlike isoform 1, scarce information is available for isoform 2, likely due to its lower expression level and lack of proper purification methods to obtain sufficient protein quantity for further assays. RESULTS: This study demonstrated the presence of short and long forms of Quiescin Q6-Sulfydryl Oxidase 2 in boar, likely representing the secretory (short form) and transmembrane (long form) forms of Quiescin Q6-Sulfydryl Oxidase 2...
June 29, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28639134/kifc1-and-myosin-va-two-motors-for-acrosomal-biogenesis-and-nuclear-shaping-during-spermiogenesis-of-portunus-trituberculatus
#15
Dan-Dan Ma, Meng-Ying Pan, Cong-Cong Hou, Fu-Qing Tan, Wan-Xi Yang
To investigate the molecular mechanisms underlying the spermiogenesis of the swimming crab Portunus trituberculatus, full lengths of motor proteins KIFC1 and myosin Va were cloned by rapid-amplification of cDNA ends from P. trituberculatus testes cDNA, and their respective probes and specific antibodies were used to track their localization during sperm maturation. Antisense probes were designed from the gene sequences and used to detect the mRNA levels of each gene. According to the results of fluorescence in situ hybridization (FISH), the transcription of kifc1 and myosin Va began at the mid-stage of spermatids, with the kifc1 mRNA being most active at the location where the acrosome cap was formed and the myosin Va was more concentrated in the acrosome complex...
June 21, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28606324/serological-lessons-from-the-bovine-lungworm-dictyocaulus-viviparus-antibody-titre-development-is-independent-of-the-infection-dose-and-reinfection-shortens-seropositivity
#16
Christina Strube, Andrea Springer, Anne-Marie Schunn, Andrew B Forbes
Infections with the bovine lungworm Dictyocaulus viviparus, the causative agent of parasitic bronchitis, are accompanied by substantial economic losses due to impacts on production, clinical respiratory disease or even death of diseased cattle. To detect lungworm antibodies in cattle, an enzyme-linked immunosorbent assay (ELISA) based on recombinant major sperm protein (MSP) has been developed. However, it remained unknown whether the infection dose influences antibody levels, and how acquired immunity influences antibody level patterns during reinfections...
August 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28600885/immunolocalization-of-tar-dna-binding-protein-of-43%C3%A2-kda-tdp-43-in-mouse-seminiferous-epithelium
#17
Hari Prasad Osuru, Patcharin Pramoonjago, Mayuresh M Abhyankar, Eric Swanson, LaToya Ann Roker, Helen Cathro, Prabhakara P Reddi
TAR DNA-binding protein of 43 kDa (TDP-43) is an evolutionarily conserved, ubiquitously expressed, multi-functional DNA/RNA-binding protein with roles in gene transcription, mRNA splicing, stability, transport, micro RNA biogenesis, and suppression of transposons. Aberrant expression of TDP-43 in testis and sperm was recently shown to be associated with male infertility, which highlights the need to understand better the expression of TDP-43 in the testis. We previously cloned TDP-43 from a mouse testis cDNA library, and showed that it functions as a transcriptional repressor and regulates the precise spatiotemporal expression of the Acrv1 gene, which encodes the acrosomal protein SP-10, during spermatogenesis...
August 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28600648/secretory-expression-of-a-novel-human-spermatozoa-antigen-in-e-coli-and-its-application-to-a-protein-chip
#18
Ming-Zhu Wang, Zhuo-Lin Qiu, Xiang-Sheng Cai, Jing-Jing Li, Miao-Qin She, Yuan-Feng Xu, Ying-Song Wu
OBJECTIVE: To produce a recombinant spermatozoa antigen peptide using the E. coli: PhoA system on a protein chip for screening anti-sperm antibodies (ASA). RESULTS: The purity of the recombinant spermatozoa antigen exceeded 95% after two-step purification, as assessed using SDS-PAGE and HPLC. The diagnostic performance of a protein chip coated with the recombinant antigen peptide was evaluated by examining ASA in 51 infertile patients in comparison with a commercial ELISA kit...
June 9, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28586125/sperm-motility-initiating-substance-may-be-insufficient-to-induce-forward-motility-of-cynops-ensicauda-sperm
#19
Tae Sato, Misato Yokoe, Daisuke Endo, Masaya Morita, Fubito Toyama, Yuuki Kawamura, Yuni Nakauchi, Eriko Takayama-Watanabe, Akihiko Watanabe
Sperm motility-initiating substance (SMIS) is a key protein for internal fertilization of the newt, Cynops pyrrhogaster, and commonly enhances forward sperm motility in some amphibian species, including external fertilizers. SMIS action varies among different species in correlation with a species-specific reproductive environment. In the present study, we identified the gene of C. ensicauda SMIS (CeSMIS) and examined the mechanism of SMIS action with reference to that of the closely related Cynops species. The CeSMIS was identified by a 176-amino acid sequence including seven amino acids critical for the initiation of sperm motility...
August 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28536242/mutation-in-tdrd9-causes-non-obstructive-azoospermia-in-infertile-men
#20
Maram Arafat, Iris Har-Vardi, Avi Harlev, Eliahu Levitas, Atif Zeadna, Maram Abofoul-Azab, Victor Dyomin, Val C Sheffield, Eitan Lunenfeld, Mahmoud Huleihel, Ruti Parvari
BACKGROUND: Azoospermia is diagnosed when sperm cells are completely absent in the ejaculate even after centrifugation. It is identified in approximately 1% of all men and in 10%-20% of infertile males. Non-obstructive azoospermia (NOA) is characterised by the absence of sperm due to either a Sertoli cell-only pattern, maturation arrest, hypospermatogenesis or mixed patterns. NOA is a severe form of male infertility, with limited treatment options and low fertility success rates. In the majority of patients, the cause for NOA is not known and mutations in only a few genes were shown to be causative...
May 23, 2017: Journal of Medical Genetics
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