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https://www.readbyqxmd.com/read/29110319/effects-of-chlamydia-trachomatis-infection-on-sperm-chromatin-condensation-and-dna-integrity
#1
L Dehghan Marvast, A R Talebi, J Ghasemzadeh, A Hosseini, A A Pacey
The present study was performed to investigate the relation of Chlamydia trachomatis infection to sperm chromatin/DNA integrity in a population of infertile men (male partner of infertile couples) from Iran. Blood, semen and first-void urine samples were obtained from 250 infertile men. Data were analysed with regard to the results of (i) serological analysis for specific antibodies to C. trachomatis in serum; (ii) the presence of C. trachomatis and DNA in first-void urine; and (iii) in the semen sample of the male partner, in addition to sperm analysis, four different tests (aniline blue, chromomycin A3, acridine orange and TUNEL) were used to detect sperm chromatin and DNA abnormalities...
November 6, 2017: Andrologia
https://www.readbyqxmd.com/read/29108134/production-of-recombinant-human-tektin-1-2-and-4-and-in-vitro-assembly-of-human-tektin-1
#2
M S Budamagunta, F Guo, N Sun, B Shibata, P G FitzGerald, J V Voss, J F Hess
Proteins predicted to be composed of large stretches of coiled-coil structure have often proven difficult to crystallize for structural determination. We have successfully applied EPR spectroscopic techniques to the study of the structure and assembly of full-length human vimentin assembled into native 11 nm filaments, in physiologic solution, circumventing the limitations of crystallizing shorter peptide sequences. Tektins are a small family of highly alpha helical filamentous proteins found in the doublet microtubules of cilia and related structures...
November 6, 2017: Cytoskeleton
https://www.readbyqxmd.com/read/29092794/evidence-of-a-procentriole-during-spermiogenesis-in-the-coccinellid-insect-adalia-decempunctata-l-an-ultrastructural-study
#3
Romano Dallai, David Mercati, José Lino-Neto, Glenda Dias, Pietro Lupetti
We studied spermatogenesis and spermiogenesis in Adaliadecempunctata (L), a beetle of the Coccinellidae family. The spermatocyte exhibits two centrioles which elongate to form a pair of primary cilia. A novel structure, appearing in cross sections as a dense droplet, is observed near the long centriole during spermiogenesis, and is soon accompanied by a procentriole (PCL). PCL structure consists of singlet microtubules, a central tubule and an incomplete cartwheel. The PCL persists until the end of spermiogenesis, when it vanishes together with the dense droplet...
October 29, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/29063176/evaluation-of-protein-phosphorylation-in-bull-sperm-during-their-maturation-in-the-epididymis
#4
Jana Jankovičová, Katarína Michalková, Petra Sečová, Ľubica Horovská, Pavla Maňásková-Postlerová, Jana Antalíková
Phosphorylation, or dephosphorylation, is one of the most frequent post-translational modifications regulating protein-protein activity in eukaryotic cells. Whereas mature spermatozoa (as specialized cells) are transcriptionally inactive and do not synthesize new proteins, phosphorylation of sperm proteins is very important for the regulation of the sperm function. Although the post-testicular maturation of spermatozoa is a process common to all mammals, comparative studies showed significant differences in sperm surface proteins and the mechanisms of protein modification during the epididymal maturation...
October 23, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29044427/genomic-identification-expression-profiling-and-functional-characterization-of-catsper-channels-in-the-bovine
#5
Gillian P Johnson, Anne-Marie English, Sinead Cronin, David A Hoey, Kieran G Meade, Sean Fair
Cation channels of sperm (CatSper) are sperm-specific calcium channels with identified roles in the regulation of sperm function in humans, mice, and horses. We sought to employ a comparative genomics approach to identify conserved CATSPER genes in the bovine genome, and profile their expression in reproductive tissue. We hypothesized that CATSPER proteins expressed in bull testicular tissue mediates sperm hyperactivation and their rheotactic response in the reproductive tract of the cow. Bioinformatic analysis identified all four known CATSPER genes (CATSPER 1-4) in the bovine genome, and profiling by quantitative real-time polymerase chain reaction identified site-specific variation in messenger ribonucleic acid (mRNA) expression for all four genes along the reproductive tract of the bull...
August 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29036365/the-developmental-origin-and-compartmentalization-of-glutathione-s-transferase-omega-2-isoforms-in-the-perinuclear-theca-of-eutherian-spermatozoa
#6
Lauren E Hamilton, Genevieve Acteau, Wei Xu, Peter Sutovsky, Richard Oko
The perinuclear theca (PT) is a condensed, nonionic detergent resistant cytosolic protein layer encapsulating the sperm head nucleus. It can be divided into two regions: the subacrosomal layer, whose proteins are involved in acrosomal assembly during spermiogenesis, and the postacrosomal sheath (PAS), whose proteins are implicated in sperm-oocyte interactions during fertilization. In continuation of our proteomic analysis of the PT, we have isolated two prominent PT-derived proteins of 28 and 31 kDa from demembranated bovine sperm head fractions...
October 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29030775/improvement-in-pregnancy-outcomes-in-couples-with-immunologically-male-infertility-undergoing-prednisolone-treatment-and-conventional-in-vitro-fertilization-preceded-by-sperm-penetration-assay-a-randomized-controlled-trial
#7
Ahmed M Taiyeb, Mundhir T Ridha-Albarzanchi, Shereen M Taiyeb, Zuhair A Kanan, Shahla K Alatrakchi, Michael E Kjelland, Saeeda A Muhsen-Alanssari
PURPOSE: Anti-sperm antibodies (ASA) in men impair not only sperm motility but also fertilization and conception. However, utilization of corticosteroids to suppress ASA has shown variable pregnancy outcomes. This controversy is also extended to include the usefulness of conventional in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) in treatments of men with ASA. This study was therefore designed to define factors contributing to these inconsistent results. METHODS: Infertile men having ASA (n = 241) were randomly assigned for treatment with or without prednisolone for three cycles each of 21 days of their partner's menstrual cycles...
October 13, 2017: Endocrine
https://www.readbyqxmd.com/read/29025071/the-expression-characteristics-of-fam71d-and-its-association-with-sperm-motility
#8
Qian Ma, Yuchi Li, Manling Luo, Huan Guo, Shouren Lin, Jianbo Chen, Y Du, Zhimao Jiang, Yaoting Gui
STUDY QUESTION: What are the features of FAM71D (Family with sequence similarity 71, member D) expression and is there an association between FAM71D expression and sperm motility? SUMMARY ANSWER: FAM71D, a novel protein exclusively expressed in the testis, is located in sperm flagella and is functionally involved in sperm motility. WHAT IS KNOWN ALREADY: Some testis-specific proteins have been reported as potential diagnostic biomarkers to evaluate the spermatogenesis process and sperm quality...
November 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28968270/cellular-targets-and-receptor-of-sexual-transmission-of-zika-virus
#9
Omar Bagasra, Krishna C Addanki, Gregory R Goodwin, Brandon W Hughes, Pratima Pandey, Ewen McLean
STUDY QUESTION: What is the mechanism of sexual transmission of Zika virus (ZIKV)? SUMMARY ANSWER: By utilizing exquisite reverse transcriptase-initiated in situ polymerase chain reaction (RT-in situ PCR), which enables an improved visualization of spermatozoa's subcellular compartment, we precisely localized the mid-piece of sperm that carry receptors for ZIKV. WHAT IS ALREADY KNOWN: ZIKV is transmitted sexually and recent studies have verified ZIKV presence in semen of previously Zika-infected patients for >6-month postinfection when ZIKV had disappeared from blood, saliva, and urine...
November 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28945244/human-antibodies-to-the-dengue-virus-e-dimer-epitope-have-therapeutic-activity-against-zika-virus-infection
#10
Estefania Fernandez, Wanwisa Dejnirattisai, Bin Cao, Suzanne M Scheaffer, Piyada Supasa, Wiyada Wongwiwat, Prabagaran Esakky, Andrea Drury, Juthathip Mongkolsapaya, Kelle H Moley, Indira U Mysorekar, Gavin R Screaton, Michael S Diamond
The Zika virus (ZIKV) epidemic has resulted in congenital abnormalities in fetuses and neonates. Although some cross-reactive dengue virus (DENV)-specific antibodies can enhance ZIKV infection in mice, those recognizing the DENV E-dimer epitope (EDE) can neutralize ZIKV infection in cell culture. We evaluated the therapeutic activity of human monoclonal antibodies to DENV EDE for their ability to control ZIKV infection in the brains, testes, placentas, and fetuses of mice. A single dose of the EDE1-B10 antibody given 3 d after ZIKV infection protected against lethality, reduced ZIKV levels in brains and testes, and preserved sperm counts...
November 2017: Nature Immunology
https://www.readbyqxmd.com/read/28911209/intracellular-activation-of-ovastacin-mediates-pre-fertilization-hardening-of-the-zona-pellucida
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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