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https://www.readbyqxmd.com/read/29676290/increased-expression-of-pelp1-in-human-sperm-is-correlated-with-decreased-semen-quality
#1
Izabela Skibinska, Miroslaw Andrusiewicz, Michal Soin, Magdalena Jendraszak, Paulina Urbaniak, Piotr Jedrzejczak, Malgorzata Kotwicka
Proline-, glutamic acid-, and leucine-rich protein 1 (PELP1) is a scaffolding protein involved in both genomic and nongenomic estrogen signal transduction pathways. To date, the role of PELP1 protein has yet to be characterized in human sperm and has not been associated with sperm parameters. To confirm the presence of PELP1 in human sperm, fresh semen samples were obtained from 178 donors. The study was designed to establish both mRNA and protein presence, and protein cellular localization. Additionally, the number of PELP1-positive spermatozoa was analyzed in men with normal and abnormal semen parameters...
April 20, 2018: Asian Journal of Andrology
https://www.readbyqxmd.com/read/29673729/perinatal-outcomes-following-ivf-with-use-of-donor-versus-partner-sperm
#2
Mohan Shashikant Kamath, Belavendra Antonisamy, Hepsy Y Selliah, Antonio La Marca, Sesh Kamal Sunkara
It is a matter of interest whether pregnancies with the use of donor sperm are associated with a higher risk of adverse perinatal outcomes compared with partner sperm. Anonymized data were obtained from the Human Fertilization & Embryology Authority. Data from 1991 to 2011 involving a total of 95,787 singleton births (4523 with donor sperm and 91,264 with partner sperm) following fresh IVF/intracytoplasmic sperm injection (ICSI) were analysed to compare perinatal outcomes of preterm birth (PTB), low birthweight (LBW) and high birthweight (HBW)...
April 6, 2018: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29673083/fine-particle-matter-disrupts-the-blood-testis-barrier-by-activating-tgf-%C3%AE-3-p38-mapk-pathway-and-decreasing-testosterone-secretion-in-rat
#3
Jianhui Liu, Lihua Ren, Jialiu Wei, Jin Zhang, Yupeng Zhu, Xiangyang Li, Li Jing, Junchao Duan, Xianqing Zhou, Zhiwei Sun
Fine particle matter (PM) is correlated with male reproductive dysfunction in animals and humans, but the underlying mechanisms remain unknown. To investigate the toxic mechanism of PM, 32 male Sprague-Dawley (SD) rats were exposed to saline or PM2.5 with the doses of 1.8, 5.4, and 16.2 mg/kg.b.w. via intratracheal instillation, respectively, one time every 3 days, in total times for 30 days. Sperm concentration, hormone level, the expressions of BTB-associated protein and the mitogen-activated protein kinase (MAPK) pathway, tumor necrosis factor α and transforming growth factor β3 levels were detected...
April 19, 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/29672554/inhibition-of-sperm-motility-in-male-macaques-with-ep055-a-potential-non-hormonal-male-contraceptive
#4
Michael G O'Rand, Katherine G Hamil, Tiffany Adevai, Mary Zelinski
Men have two practical choices for contraception; the condom which has a high typical use failure rate or vasectomy. New male hormonal and non-hormonal contraceptives are under development that target either the production of sperm (spermatogenesis) or the delivery of sperm. One particular target is the sperm protein EPPIN, which is present on the surface of human spermatozoa. EP055 is a small organic compound that targets EPPIN on the surface of sperm and inhibits motility. EP055 was tested in cynomolgus (Macaca fascicularis) males to determine its plasma half-life after intravenous (i...
2018: PloS One
https://www.readbyqxmd.com/read/29671763/cd9-and-cd81-interactions-and-their-structural-modelling-in-sperm-prior-to-fertilization
#5
Michaela Frolikova, Pavla Manaskova-Postlerova, Jiri Cerny, Jana Jankovicova, Ondrej Simonik, Alzbeta Pohlova, Petra Secova, Jana Antalikova, Katerina Dvorakova-Hortova
Proteins CD9 and CD81 are members of the tetraspanin superfamily and were detected in mammalian sperm, where they are suspected to form an active tetraspanin web and to participate in sperm⁻egg membrane fusion. The importance of these two proteins during the early stages of fertilization is supported by the complete sterility of CD9/CD81 double null female mice. In this study, the putative mechanism of CD9/CD81 involvement in tetraspanin web formation in sperm and its activity prior to fertilization was addressed...
April 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29671339/in-vitro-study-evaluating-the-instantaneous-treatment-of-ozonised-olive-oil-on-human-sperm
#6
Yan Fan, Na Chen, Mei Wang, Meng Rao, Ping Su
OBJECTIVE: The aim of our study was to evaluate the effects of ozonised olive oil (OOO) on human sperm in vitro. METHODS: Human sperm was incubated with OOO for 20 s in vitro. The lowest concentration that completely immobilised all the sperm in 20 s without subsequent recovery of motility was recorded as the minimum effective concentration (MEC). The effects of OOO at MEC on human sperm viability, mitochondrial and acrosomal status, DNA integrity and transmission electron microscopy were observed...
April 19, 2018: European Journal of Contraception & Reproductive Health Care
https://www.readbyqxmd.com/read/29667547/new-markers-for-predicting-fertility-of-the-male-gametes-in-the-post-genomic-age
#7
Savina Dipresa, Luca De Toni, Carlo Foresta, Andrea Garolla
A number of test have been proposed to assess male fertility potential, ranging from routine testing by light microscopic method for evaluating semen samples, to screening test for DNA integrity aimed to look at sperm chromatin abnormalities. Spermatozoa are an extremely differentiated cell, they have critical functions for embryo development and heredity, in addiction to delivering a haploid paternal genome to the oocyte. Towards this goal certain requirements must always be met. The ability of spermatozoa to perform its reproductive function taking place in the spermatogenesis, a highly specialized process depending on multiple factors with effect on male fertility...
April 18, 2018: Protein and Peptide Letters
https://www.readbyqxmd.com/read/29663943/retrospective-review-of-surgical-outcomes-and-pair-housing-success-in-vasectomized-rhesus-macaques-macaca-mulatta
#8
Dilrukshi K Ekanayake-Alper, Steven R Wilson, Jodi A Scholz
Providing social housing for adult male macaques can be challenging. One successful strategy for long-term social housing of adult male macaques is to pair them with adult females; however, unwanted breeding must be prevented by sterilization of the male or female. Vasectomy is a simple, highly effective, and minimally invasive method of contraception that is used at our institution to facilitate social housing. We performed a retrospective review to analyze the surgical outcomes and rate of postoperative complications after vasectomy of adult rhesus macaques at our research facility...
April 2, 2018: Comparative Medicine
https://www.readbyqxmd.com/read/29662193/spag5-promotes-proliferation-and-suppresses-apoptosis-in-bladder-urothelial-carcinoma-by-upregulating-wnt3-via-activating-the-akt-mtor-pathway-and-predicts-poorer-survival
#9
J Y Liu, Q H Zeng, P G Cao, D Xie, F Yang, L Y He, Y B Dai, J J Li, X M Liu, H L Zeng, X J Fan, L Liu, Y X Zhu, L Gong, Y Cheng, J D Zhou, J Hu, H Bo, Z Z Xu, K Cao
Sperm-associated antigen 5 (SPAG5) is involved in various biological processes. However, the roles of SPAG5 in bladder urothelial carcinoma (BUC) are unknown. This study showed that upregulation of SPAG5 was detected frequently in primary BUC tissues, and was associated with significantly worse survival among the 112 patients that underwent radical cystectomy (RC). Up and downregulating the expression of SPAG5 enhanced or inhibited, respectively, the proliferation of BUC cells in vitro and in vivo, and suppressed or enhanced, respectively, apoptosis in vitro and in vivo...
April 17, 2018: Oncogene
https://www.readbyqxmd.com/read/29659949/emc10-governs-male-fertility-via-maintaining-sperm-ion-balance
#10
Yuchuan Zhou, Fei Wu, Man Zhang, Zuquan Xiong, Qianqian Yin, Yanfei Ru, Huijuan Shi, Jinsong Li, Shanhua Mao, Yanliang Li, Xinyi Cao, Renming Hu, Chong Wee Liew, Qiang Ding, Xuanchun Wang, Yonglian Zhang
Infertility is a severe public health problem worldwide that prevails up to 15% in reproductive-age couples, and male infertility accounts for half of total infertility. Studies on genetically modified animal models have identified lots of genes involved in the pathogenesis of male infertility. The underlying causes, however, remain largely unclear. In this study, we provide evidence that EMC10, one subunit of endoplasmic reticulum (ER) membrane protein complex (EMC), is required for male fertility. EMC10 is significantly decreased in spermatozoa from patients with asthenozoospermia and positively associated with human sperm motility...
April 6, 2018: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/29653228/down-regulated-let-7b-5p-represses-glycolysis-metabolism-by-targeting-aurkb-in-asthenozoospermia
#11
Ran Zhou, Yan Zhang, Guizhen Du, Li Han, Sinian Zheng, Jian Liang, Xiaomin Huang, Yufeng Qin, Wei Wu, Minjian Chen, Di Wu, Ling Song, Guangbo Fu, Shuyan Lv, Yankai Xia, Chuncheng Lu, Xinru Wang
Glycolysis, through anaerobic respiration, can supply energy for human sperm motility. MicroRNAs (miRNAs) could participate in the glycolytic pathway through regulating target genes. To investigate the potential role of glycolysis-related miRNAs in asthenozoospermia, TaqMan Low Density Array (TLDA) was used to screen potentially functional miRNAs, and seven glycolysis-related miRNAs were isolated to be related to asthenozoospermia. After qRT-PCR validation, only one seminal plasma miRNA, let-7b-5p, was found significantly decreased in severe asthenozoospermia cases compared with healthy controls...
April 10, 2018: Gene
https://www.readbyqxmd.com/read/29651935/role-of-the-nicotine-receptors-on-sperm-function
#12
Rosita Angela Condorelli, Sandro La Vignera, Aldo E Calogero
Many evidences attribute to cigarette smoking a negative effect on the reproductive health of both genders, but the mechanisms are not entirely clear. Many compounds derived from cigarette combustion may be responsible for the negative impact that cigarette smoke has on sperm parameters. In particular, the effects of nicotine, an alkaloid present in the tobacco plant and the main constituent of cigarette smoke, on sperm parameters, have been studied, showing that it alters sperm parameters. Recently we investigated the mechanism by which nicotine alters spermatozoa through the evaluation of the expression of nicotinic receptors subunits in human spermatozoa...
April 12, 2018: Protein and Peptide Letters
https://www.readbyqxmd.com/read/29648649/infectious-inflammatory-and-autoimmune-male-factor-infertility-how-do-rodent-models-inform-clinical-practice
#13
Monika Fijak, Adrian Pilatz, Mark P Hedger, Nour Nicolas, Sudhanshu Bhushan, Vera Michel, Kenneth S K Tung, Hans-Christian Schuppe, Andreas Meinhardt
BACKGROUND: Infection and inflammation of the reproductive tract are significant causes of male factor infertility. Ascending infections caused by sexually transmitted bacteria or urinary tract pathogens represent the most frequent aetiology of epididymo-orchitis, but viral, haematogenous dissemination is also a contributory factor. Limitations in adequate diagnosis and therapy reflect an obvious need for further understanding of human epididymal and testicular immunopathologies and their contribution to infertility...
April 10, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29642968/review-historical-and-futuristic-developments-in-bovine-semen-technology
#14
P Lonergan
Up to the 18th century, the prevailing view of reproduction, or 'generation' as it was referred to, was that organisms develop from miniatures of themselves, termed preformation. The alternative theory, epigenesis, proposed that the structure of an animal emerges gradually from a relatively formless egg. The teachings of the Ancient Greeks who argued either that both sexes each contributed 'semen' to form the embryo, or held a more male-centred view that the female merely provided fertile ground for the male seed to grow, dominated thinking until the 17th century, when the combined work of numerous scholars led to the theory that all female organisms, including humans, produced eggs...
April 12, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29642908/putative-human-sperm-interactome-a-networks-study
#15
Alessandra Ordinelli, Nicola Bernabò, Massimiliano Orsini, Mauro Mattioli, Barbara Barboni
BACKGROUND: For over sixty years, it has been known that mammalian spermatozoa immediately after ejaculation are virtually infertile. They became able to fertilize only after they reside for long time (hours to days) within female genital tract where they complete their functional maturation, the capacitation. This process is finely regulated by the interaction with the female environment and involves, in spermatozoa, a myriad of molecules as messengers and target of signals. Since, to date, a model able to represent the molecular interaction that characterize sperm physiology does not exist, we realized the Human Sperm Interactme Network3...
April 11, 2018: BMC Systems Biology
https://www.readbyqxmd.com/read/29626673/assessment-of-gonadotropins-and-testosterone-hormone-levels-in-regular-mitragyna-speciosa-korth-users
#16
Darshan Singh, Vikneswaran Murugaiyah, Shahrul Bariyah Sahul Hamid, Vicknasingam Kasinather, Michelle Su Ann Chan, Eric Tatt Wei Ho, Oliver Grundmann, Nelson Jeng Yeou Chear, Sharif Mahsufi Mansor
ETHNOPHARMACOLOGICAL RELEVANCE: Mitragyna speciosa (Korth.) also known as kratom, is a native medicinal plant of Southeast Asia with opioid-like effects. Kratom tea/juice have been traditionally used as a folk remedy and for controlling opiate withdrawal in Malaysia. Long-term opioid use is associated with depletion in testosterone levels. AIM OF THE STUDY: Since kratom is reported to deform sperm morphology and reduce sperm motility, we aimed to clinically investigate the testosterone levels following long-term kratom tea/juice use in regular kratom users...
April 4, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29622351/proteomics-a-valuable-approach-to-elucidate-spermatozoa-post-testicular-maturation-in-the-endangered-acipenseridae-family
#17
REVIEW
Pietro Boccaletto, Mohammad Abdul Momin Siddique, Jacky Cosson
Proteomics techniques, such as two-dimensional polyacrylamide gel electrophoresis, mass spectrometry, and differential gel electrophoresis, have been extensively used to describe the protein composition of male gametes in different animals, mainly mammals. They have also provided a deeper understanding of protein functions involved in sperm processes, as in processes that in humans lead to male infertility. However, few studies focus on fish sperm proteomics and even fewer have tried to explore the proteomic profile of Sturgeon spermatozoa...
March 31, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29620419/artificial-oocyte-activation-with-calcium-ionophore-for-frozen-sperm-cycles
#18
Seda Karabulut, Özlem Aksünger, Can Ata, Yusuf Sağıroglu, İlknur Keskin
Fertilization problems are the major problems that may be faced in 30-55% of the patients during an intracytoplasmic sperm injection (ICSI) cycle. A successful oocyte activation depends on factors related to both sperm and oocyte, and one of the important factors that mediates the process is Ca2+ concentration within the oocyte. Artificial oocyte activation (AOA) is a method used for fertilization problems that commonly involve the usage of Ca2+ ionophores and is usually used in problems such as total fertilization failure (TFF) and globozoospermia...
April 5, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29618076/age-and-body-size-influence-sperm-quantity-in-male-aedes-albopictus-diptera-culicidae-mosquitoes
#19
A J Hatala, L C Harrington, E C Degner
Aedes albopictus (Skuse) (Diptera: Culicidae) is a vector of several arboviruses impacting human health, including dengue, chikungunya, and potentially Zika. Vector control strategies that deploy modified males into the field are in use or under development and require a solid understanding of male biology; unfortunately, there has been limited effort to understand male Ae. albopictus reproductive biology, including sperm production and capacity. We tested whether body size and age affect spermatogenesis in Ae...
March 31, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29615326/characterization-of-centriole-duplication-in-human-epidermis-bowen-s-disease-and-squamous-cell-carcinoma
#20
Saori Watanuki, Harumi Fujita, Keisuke Kouyama, Masayuki Amagai, Akiharu Kubo
BACKGROUND: Centrosomes contain two centrioles: a pre-existing mature centriole and a newly formed immature centriole. Each centriole is duplicated once within a cell cycle, which is crucial for proper centrosome duplication and cell division. OBJECTIVE: To describe the centrosome duplication cycle in human epidermis, Bowen's disease (BD), and squamous cell carcinoma (SCC). METHODS: Immunofluorescent staining of centriolar proteins and Ki-67 was used to evaluate cell cycles and the number of centrioles...
March 16, 2018: Journal of Dermatological Science
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