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Male infertility

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https://www.readbyqxmd.com/read/28339861/constitutive-luteinizing-hormone-receptor-signaling-causes-sexual-dysfunction-and-leydig-cell-adenomas-in-male-mice1
#1
Lan Hai, Deepak S Hiremath, Marilène Paquet, Prema Narayan
The luteinizing hormone receptor (LHCGR) is necessary for fertility and genetic mutations cause defects in reproductive development and function. Activating mutations in LHCGR cause familial male limited precocious puberty (FMPP). We have previously characterized a mouse model (KiLHRD582G) for FMPP that exhibits the same phenotype of precocious puberty, Leydig cell hyperplasia and elevated testosterone as boys with the disorder. We observed that KiLHRD582G male mice became infertile by 6 months of age although sperm count and motility were normal...
February 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339784/regulatory-effects-of-autophagy-on-spermatogenesis
#2
Jun Yin, Bing Ni, Zhi-Qiang Tian, Fan Yang, Wei-Gong Liao, Yu-Qi Gao
Abnormal spermatogenesis is an important pathophysiological process underlying male infertility. Apoptosis of spermatogenic cells and disruption of ectoplasmic specialization (ES) have been characterized as the key biological events of this disorder. Under physiological and pathophysiological conditions (such as exposure to starvation, environmental chemicals, radiation), autophagy is activated in spermatogenic or Sertoli cells in order to maintain survival of the spermatogenic cells by inhibiting spermatogenic cell apoptosis and stabilizing the integrity of ES via degradation of PDZ and LIM domain 1 (PDLIM1), a negative regulator of cytoskeletal organization...
February 25, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339678/ddx4-egfp-transgenic-rat-model-for-the-study-of-germline-development-and-spermatogenesis%C3%A2
#3
Kathrin Gassei, Yi Sheng, Adetunji Fayomi, Payal Mital, Meena Sukhwani, Chih-Cheng Lin, Karen A Peters, Andrew Althouse, Hanna Valli, Kyle E Orwig
Spermatogonial stem cells (SSC) are essential for spermatogenesis and male fertility. In addition, these adult tissue stem cells can be used as vehicles for germline modification in animal models and may have application for treating male infertility. To facilitate the investigation of SSCs and germ lineage development in rats, we generated a DEAD-box helicase 4 (DDX4) (VASA) promoter-enhanced green fluorescent protein (EGFP) reporter transgenic rat. Quantitative real-time polymerase chain reaction and immunofluorescence confirmed that EGFP was expressed in the germ cells of the ovaries and testes and was absent in somatic cells and tissues...
February 20, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339631/evidence-for-the-involvement-of-the-proximal-copy-of-the-magea9-gene-in-xq28-linked-cnv67-specific-to-spermatogenic-failure%C3%A2
#4
Ying Shen, Jinyan Xu, Xiling Yang, Yunqiang Liu, Yongyi Ma, Dong Yang, Qiang Dong, Yuan Yang
Spermatogenic failure characterized by impaired sperm production is a common multifactorial disease with molecular and cytogenetic causes for its extreme phenotype that include azoospermia and severe oliogzoospermia. Recently, a high-resolution array-comparative genomic hybridization analysis of the X chromosome and a subsequent cohort study revealed three X-linked microdeletions (CNV64, CNV67, and CNV69) that were associated with decreased sperm production in a mixed group that included Spanish and Italian males...
February 7, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339613/a-nonsense-mutation-in-ccdc62-gene-is-responsible-for-spermiogenesis-defects-and-male-infertility-in-repro29-repro29-mice%C3%A2
#5
Yuchi Li, Cailing Li, Shouren Lin, Bo Yang, Weiren Huang, Hanwei Wu, Yuanbin Chen, Lihua Yang, Manling Luo, Huan Guo, Jianbo Chen, Tiantian Wang, Qian Ma, Yanli Gu, Lisha Mou, Zhimao Jiang, Jun Xia, Yaoting Gui
Phenotype-driven mutagenesis is an unbiased method to identify novel genes involved in spermatogenesis and other reproductive processes. Male repro29/repro29 mice generated by the Reproductive Genomics Program at the Jackson Laboratory were infertile with deformed sperm and poor motility. Using selected exonic capture and massively parallel sequencing technologies, we identified a nonsense mutation in the exon 6 of coiled-coil domain-containing 62 gene (Ccdc62), which results in a formation of a premature stop codon and a truncated protein...
January 28, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28334509/disturbed-testicular-expression-of-the-estrogen-metabolizing-enzymes-cyp1a1-and-comt-in-infertile-men-with-primary-spermatogenic-failure-possible-negative-implications-on-sertoli-cells
#6
A Parada-Bustamante, C Molina, C Valencia, M Flórez, M C Lardone, F Argandoña, A Piottante, M Ebensperguer, P A Orihuela, A Castro
Estradiol (E2 ) is normally metabolized to hydroxyestradiols and methoxyestradiols by CYP1A1, CYP1B1 and COMT. However, an altered production of these metabolites by a disturbed expression of these enzymes is associated with reproductive and non-reproductive pathologies. In vitro studies suggest that increased hydroxyestradiols and methoxyestradiols intratesticular generation is related to male infertility, but no studies have explored whether infertile men have a disturbed testicular expression of the enzymes that generate these E2 metabolites...
March 23, 2017: Andrology
https://www.readbyqxmd.com/read/28334508/dietary-fatty-acids-influence-sperm-quality-and-function
#7
A Ferramosca, N Moscatelli, M Di Giacomo, V Zara
Recently, obesity has been linked to male infertility. In animal models the administration of a high-fat diet caused a reduction in sperm quality, by impairing gamete energy metabolism. The aim of this study was to investigate a possible effect of dietary fatty acids supplementation in the modulation of sperm energy metabolism and, in turn, in the improvement of sperm quality in rats fed a high-fat diet. Sexually mature male Sprague-Dawley rats were divided into four groups and fed for 4 weeks a standard diet (control group), a high-fat diet (enriched in 35% of fat and 15% sucrose), a high-fat diet supplemented with 2...
March 23, 2017: Andrology
https://www.readbyqxmd.com/read/28333357/dietary-patterns-foods-and-nutrients-in-male-fertility-parameters-and-fecundability-a-systematic-review-of-observational-studies
#8
Albert Salas-Huetos, Mònica Bulló, Jordi Salas-Salvadó
BACKGROUND: Infertility is a global public health issue, affecting 15% of all couples of reproductive age. Male factors, including decreased semen quality, are responsible for ~25% of these cases. The dietary pattern, the components of the diet and nutrients have been studied as possible determinants of sperm function and/or fertility. OBJECTIVE AND RATIONALE: Previous systematic reviews have been made of the few heterogeneous low-quality randomized clinical trials (RCTs) conducted in small samples of participants and investigating the effect of specific nutrients and nutritional supplements on male infertility...
March 10, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28333354/men-s-knowledge-attitudes-and-behaviours-relating-to-fertility
#9
Karin Hammarberg, Veronica Collins, Carol Holden, Kate Young, Robert McLachlan
BACKGROUND: The increasingly common practice in high-income countries to delay childbearing to the fourth and fifth decades of life increases the risk of involuntary childlessness or having fewer children than desired. Older age also increases the risk of age-related infertility, the need for ART to conceive, and obstetric and neonatal complications. Existing research relating to childbearing focusses almost exclusively on women, and in public discourse declining fertility rates are often assumed to be the result of women delaying childbearing to pursue other life goals such as a career and travel...
March 10, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28333338/drug-discovery-for-male-subfertility-using-high-throughput-screening-a-new-approach-to-an-unsolved-problem
#10
Sarah J Martins da Silva, Sean G Brown, Keith Sutton, Louise V King, Halil Ruso, David W Gray, Paul G Wyatt, Mark C Kelly, Christopher L R Barratt, Anthony G Hope
STUDY QUESTION: Can pharma drug discovery approaches be utilized to transform investigation into novel therapeutics for male infertility? SUMMARY ANSWER: High-throughput screening (HTS) is a viable approach to much-needed drug discovery for male factor infertility. WHAT IS KNOWN ALREADY: There is both huge demand and a genuine clinical need for new treatment options for infertile men. However, the time, effort and resources required for drug discovery are currently exorbitant, due to the unique challenges of the cellular, physical and functional properties of human spermatozoa and a lack of appropriate assay platform...
March 16, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333301/preconception-maternal-lipoprotein-levels-in-relation-to-fecundability
#11
Sarah J Pugh, Enrique F Schisterman, Richard W Browne, Anne M Lynch, Sunni L Mumford, Neil J Perkins, Robert Silver, Lindsey Sjaarda, Joseph B Stanford, Jean Wactawski-Wende, Brian Wilcox, Katherine L Grantz
STUDY QUESTION: Are maternal preconception lipid levels associated with fecundability? SUMMARY ANSWER: Fecundability was reduced for all abnormal female lipid levels including total cholesterol, low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and total triglyceride levels. WHAT IS KNOWN ALREADY: Subfecundity affects 7-15% of the population and lipid disorders are hypothesized to play a role since cholesterol acts as a substrate for the synthesis of steroid hormones...
March 15, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333300/comparison-of-global-gene-expression-profiles-of-microdissected-human-foetal-leydig-cells-with-their-normal-and-hyperplastic-adult-equivalents
#12
Grete Lottrup, Kirstine Belling, Henrik Leffers, John E Nielsen, Marlene D Dalgaard, Anders Juul, Niels E Skakkebæk, Søren Brunak, Ewa Rajpert-De Meyts
STUDY QUESTION: Do human adult Leydig cells (ALCs) within hyperplastic micronodules display characteristics of foetal LCs (FLCs)? SUMMARY ANSWER: The gene expression profiles of FLCs and all ALC subgroups were clearly different, but there were no significant differences in expressed genes between the normally clustered and hyperplastic ALCs. WHAT IS KNOWN ALREADY: LCs are the primary androgen producing cells in males throughout development and appear in chronologically distinct populations; FLCs, neonatal LCs and ALCs...
March 17, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28333023/hyaluronan-binding-system-for-sperm-selection-enhances-pregnancy-rates-in-icsi-cycles-associated-with-male-factor-infertility
#13
Renata F Erberelli, Renato M Salgado, Dirceu H Mendes Pereira, Philip Wolff
OBJECTIVES: The aim of the present study was to compare two procedures for sperm selection in ICSI cycles - conventional morphology sperm selection (ICSI-PVP) and chemical selection through Hyaluronan-treated petri dishes (PICSI), when male factor was associated. METHODS: The evaluated parameters were semen quality, fertilization and cleavage rates, chemical and clinical pregnancy rates, as well as abortion rate. Fifty-six ICSI cycles were included in this report, 19 cycles using PICSI and 37 using conventional ICSI...
February 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28332859/magnesium-sulfate-mediate-morphine-administration-reduction-in-varicocelectomy-surgery
#14
Sedigheh Nadri, Hormoz Mahmoudvand, Mahmoud Reza Moradkhani
AIMS: Varicocelectomy is the most common operation carried out by doctors for male infertility treatment. The aim of varicocele treatment is to hinder the refluxing venous drainage to the testis, retaining arterial inflow, and lymphatic drainage. A lot of pain is generated after this surgery, and the use of opium should be reduced to nearest minimum, as all drugs are toxins. Thus the aim of the present study is to facilitate morphine usage reduction after varicocelectomy surgery. MATERIAL AND METHODS: One-hundred (100) patients who were varicocelectomy candidate were randomized into two groups: experimental group contain 50 patients and control group contain 50 patients as well...
March 23, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28331619/processing-and-selection-of-surgically-retrieved-sperm-for-icsi-a-review
#15
Greta Verheyen, Biljana Popovic-Todorovic, Herman Tournaye
Although the technique of intracytoplasmic sperm injection (ICSI) has been a revolution in the alleviation of male infertility, the use of testicular sperm for ICSI was a formerly unseen breakthrough in the treatment of the azoospermic man with primary testicular failure. At the clinical level, different procedures of testicular sperm retrieval (conventional TESE, micro-TESE, FNA/TESA, MESA, PESA) are being performed, the choice is mainly based on the cause of azoospermia (obstructive versus non-obstructive) and the surgeon's skills...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28330882/adiponectin-and-resistin-a-role-in-the-hypothalamo-pituitary-gonadal-axis
#16
Agnieszka Rak, Namya Mellouk, Pascal Froment, Joëlle Dupont
Adipokines, including adiponectin and resistin, are cytokines produced mainly by adipose tissue. They play a significant role in the metabolic functions that regulate insulin sensitivity and inflammation. Alteration of adiponectin and resistin plasma levels, or their expression in metabolic and gonadal tissue, are observed in some metabolic pathologies, such as obesity. Several studies have shown that these two hormones and the receptors for adiponectin, AdipoR1 and AdipoR2, are present in various reproductive tissues in both sexes of different species...
March 22, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28330865/an-automated-smartphone-based-diagnostic-assay-for-point-of-care-semen-analysis
#17
Manoj Kumar Kanakasabapathy, Magesh Sadasivam, Anupriya Singh, Collin Preston, Prudhvi Thirumalaraju, Maanasa Venkataraman, Charles L Bormann, Mohamed Shehata Draz, John C Petrozza, Hadi Shafiee
Male infertility affects up to 12% of the world's male population and is linked to various environmental and medical conditions. Manual microscope-based testing and computer-assisted semen analysis (CASA) are the current standard methods to diagnose male infertility; however, these methods are labor-intensive, expensive, and laboratory-based. Cultural and socially dominated stigma against male infertility testing hinders a large number of men from getting tested for infertility, especially in resource-limited African countries...
March 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28330469/preclinical-evaluation-of-a-tex101-protein-elisa-test-for-the-differential-diagnosis-of-male-infertility
#18
Dimitrios Korbakis, Christina Schiza, Davor Brinc, Antoninus Soosaipillai, Theano D Karakosta, Christine Légaré, Robert Sullivan, Brendan Mullen, Keith Jarvi, Eleftherios P Diamandis, Andrei P Drabovich
BACKGROUND: TEX101 is a cell membrane protein exclusively expressed by testicular germ cells and shed into seminal plasma. We previously verified human TEX101 as a biomarker for the differential diagnosis of azoospermia, and developed a first-of-its-kind TEX101 ELISA. To demonstrate the clinical utility of TEX101, in this work we aimed at evaluating ELISA performance in a large population of fertile, subfertile, and infertile men. METHODS: Mass spectrometry, size-exclusion chromatography, ultracentrifugation, and immunohistochemistry were used to characterize TEX101 protein as an analyte in seminal plasma...
March 23, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28330414/male-subfertility-as-a-chronic-illness-the-role-of-adaptive-challenges
#19
Eleanor L Stevenson, Kevin R McEleny
Male factor infertility (MFI) is extremely common, often with several associated chronic health conditions. Because a man's fertility assessment may be their first contact with health services, the health care team has a responsibility to act as male health advocates to ensure comprehensive care. The diagnosis of subfertility allows a broader view of these men as patients with a chronic illness who have complex health needs. Because of the associated complexity of care following evaluation, there needs to be new approach in how men affected by MFI should be managed long term...
March 22, 2017: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/28329409/spiritual-aspects-of-living-with-infertility-synthesis-of-qualitative-studies
#20
REVIEW
Joana Romeiro, Sílvia Caldeira, Vivienne Brady, Fiona Timmins, Jenny Hall
AIM: To identify the spiritual aspects of patients experiencing infertility and seek a deeper and broader meaning of the involuntary childlessness experience. BACKGROUND: Infertility can be the cause for a spiritual crisis among some couples. Those who endure this involuntary childlessness condition frequently experience contradictory feelings and needs. In this context, core aspects of spirituality such as meaning and purpose in life are often questioned. DESIGN: A review and synthesis of qualitative empirical research was undertaken in order to seek a deeper understanding of the spiritual aspects of patients' experiences of infertility...
March 22, 2017: Journal of Clinical Nursing
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