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https://www.readbyqxmd.com/read/28431403/association-of-the-vdac3-gene-polymorphism-with-sperm-count-in-han-chinese-population-with-idiopathic-male-infertility
#1
Lianjun Pan, Qingzhen Liu, Jingyun Li, Wei Wu, Xinru Wang, Dan Zhao, Jiehua Ma
Voltage-dependent anion channel (VDAC) is a multifunctional channel protein across the outer mitochondrial membrane of somatic cells and participates in many physiological and pathophysiological processes. Up to now, only a few studies, including our previous studies, showed that VDAC exists in mammalian spermatozoa and is involved in spermatogenesis and sperm functions. There is no report about VDAC genetic variants in germinal tissues or cells. To investigate the possible association between VDAC genetic variants and human sperm quality, we performed semen analysis and variant Genotyping of VDAC3 subtype (rs7004637, rs16891278 and rs6773) of 523 Han-Chinese males with idiopathic infertility respectively by computer assisted semen analysis (CASA) and single nucleotide polymorphism (SNP) Genotyping assay...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28431332/sperm-morphology-of-the-leafhopper-diaphorina-citri-kuwayama-hemiptera-sternorrhyncha-psylloidea-liviidae
#2
Marcelo Silva Barcellos, Jamile Fernanda Silva Cossolin, Glenda Dias, José Lino-Neto
In this study, by using light and electron microscopy, we describe the sperm morphology of the leafhopper Diaphorina citri, a serious pest of citrus throughout the world. In this species the sperm measures 538.49±8.75μm in length, and as observed in psylloids, the sperm, when manipulated, opens into two filaments, one of which is attached to the nuclear base and the other becomes free. Along the flagellum, and only of it, there are lateral projections, about 2μm in length. Furthermore, at the end of the flagellum three appendages, with approximately 7μm in length, are observed...
April 8, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28431025/1h-magnetic-resonance-spectroscopy-of-live-human-sperm
#3
S Reynolds, S J Calvert, M N Paley, A A Pacey
STUDY QUESTION: Can 1H Magnetic Resonance Spectroscopy (MRS) be used to obtain information about the molecules and metabolites in live human spermatozoa? SUMMARY ANSWER: Percoll-based density gradient centrifugation (DGC) followed by a further two washing steps, yielded enough sperm with minimal contamination (<0.01%) from seminal fluid to permit effective MRS which detected significant differences (p < 0.05) in the choline/glycerophosphocholine, lipid and lactate regions of the 1H MRS spectrum between sperm in the pellet and those from the 40/80% interface...
April 18, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28430968/sex-chromosome-dependent-differential-viability-of-human-spermatozoa-during-prolonged-incubation
#4
Young-Ah You, Woo-Sung Kwon, Md Saidur Rahman, Yoo-Jin Park, Young-Ju Kim, Myung-Geol Pang
STUDY QUESTION: Are there significant differences in the ability of X chromosome-bearing (X) spermatozoa and Y chromosome-bearing (Y) spermatozoa to survive incubation under stressful conditions? SUMMARY ANSWER: Y spermatozoa are more vulnerable to stress than their X counterparts depending on culture period and temperature, and show higher expression of apoptotic proteins. WHAT IS KNOWN ALREADY: The primary sex ratio is determined by there being an equal number of spermatozoa carrying X and Y chromosomes...
April 19, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28430907/food-intake-affects-sperm-egg-fusion-through-the-gip-psg17-axis-in-mice
#5
Tatsunori Shimizu, Takehiro Sato, Katsushi Tsukiyama, Hiroki Fujita, Shunsuke Kato, Manabu Hoizumi, Hiromitsu Shirasawa, Takuma Narita, Yukihiro Terada, Yutaka Seino, Yuichiro Yamada
In addition to overeating, starvation also reduces fecundity in mammals. However, little is known about the molecular mechanisms linking food intake to fertility, especially in males. Gastric inhibitory polypeptide (GIP), which is released from intestinal K-cells after meal ingestion, stimulates insulin secretion from pancreatic β-cells through the action of incretin and has several extra-pancreatic effects. Here, we identified GIP receptor (Gipr) expression in mouse spermatids. Microarray analysis revealed that pregnancy-specific glycoprotein 17 (Psg17), a potential CD9-binding partner, was significantly decreased in GIP receptor-knockout (Gipr-/-) testes...
April 19, 2017: Endocrinology
https://www.readbyqxmd.com/read/28430876/ift25-an-intraflagellar-transporter-protein-dispensable-for-ciliogenesis-in-somatic-cells-is-essential-for-sperm-flagella-formation
#6
Hong Liu, Wei Li, Yong Zhang, Zhengang Zhang, Xuejun Shang, Ling Zhang, Shiyang Zhang, Yanwei Li, Andres V Somoza, Brandon Delpi, George L Gerton, James A Foster, Rex A Hess, Gregory J Pazour, Zhibing Zhang
Intraflagellar transport (IFT) is a conserved mechanism essential for the assembly and maintenance of most eukaryotic cilia and flagella. However, IFT25, a component of the IFT complex is not required for the formation of cilia in somatic tissues. In mice, the gene is highly expressed in the testis, and its expression is up-regulated during the final phase when sperm flagella are formed. To investigate the role of IFT25 in sperm flagella formation, the gene was specifically disrupted in male germ cells. All homozygous knockout mice survived to adulthood and did not show any gross abnormalities...
April 18, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28429281/impact-of-thyroid-disease-on-testicular-function
#7
REVIEW
Sandro La Vignera, Roberto Vita, Rosita A Condorelli, Laura M Mongioì, Silvia Presti, Salvatore Benvenga, Aldo E Calogero
INTRODUCTION: Testis was considered unresponsive to thyroid hormone for a long time. However, like in animals, the presence of thyroid hormone receptors in different testicular cell types was demonstrated also in humans. Accordingly, thyrotoxicosis and hypothyroidism have remarkable effects on testicular function and more extensively on fertility. REVIEW: Thyrotoxicosis and hypothyroidism are associated with changes affecting the endocrine, sexual, or reproductive functions...
April 20, 2017: Endocrine
https://www.readbyqxmd.com/read/28429153/relative-abundance-of-heat-shock-proteins-and-clusterin-transcripts-in-spermatozoa-collected-form-boar-routinely-utilised-in-an-artificial-insemination-centre-preliminary-results
#8
A Zannoni, C Bernardini, A Zaniboni, E Ferlizza, D Ventrella, M L Bacci, M Forni
It is widely accepted that mature sperm contains RNA. The first hypothesis was that sperm RNAs have no functions of their own but are simply residues of spermatogenesis reflecting the events that occurred during their formation in the testes. More recently new discoveries have essentially expanded these views, showing that sperm mRNAs constitute a population of stable full-length transcripts, many of which are selectively retained during spermatogenesis and delivered to oocytes contributing to early embryo development...
April 21, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28429094/prospective-evaluation-of-scrotal-ultrasound-and-intratesticular-perfusion-by-color-coded-duplex-sonography-ccds-in-tese-patients-with-azoospermia
#9
Bora Altinkilic, Adrian Pilatz, Thorsten Diemer, Julia Wolf, Martin Bergmann, Sarah Schönbrunn, Uwe Ligges, Hans-Christian Schuppe, Wolfgang Weidner
PURPOSE: The objective of this study was to assess whether CCDS might improve the outcome of testicular sperm retrieval in patients with azoospermia. Furthermore, we evaluated potential sonographic alterations of the testis before and after trifocal and Micro-TESE. METHODS: 78 patients were enrolled prospectively: 24 with obstructive azoospermia (OA) and 54 with non-obstructive azoospermia (NOA). 31 of 54 patients in the NOA group had negative surgical sperm retrieval...
April 20, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28428945/a-successful-pregnancy-using-completely-immotile-but-viable-frozen-thawed-spermatozoa-selected-by-laser
#10
Huanhua Chen, Guixue Feng, Bo Zhang, Hong Zhou, Jinhui Shu, Xianyou Gan
The aim of this study was to report a successful pregnancy using completely immotile frozen-thawed spermatozoa selected by laser. A single laser shot was used to detect the presence of viable immotile spermatozoa in fresh and frozen-thawed testicular spermatozoa. The viability rate was 55.8% after the laser detection, and cryopreservation was carried out immediately. The thawing test was performed on the day of oocyte pick-up, and no motile sperm were observed after extending the culture for another 4 hours, while a survival rate of 39...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428944/the-status-of-assisted-reproductive-technology-in-korea-in-2012
#11
Gyoung Hoon Lee, Hyun Jin Song, Young Min Choi, Hyuck Dong Han
OBJECTIVE: This study was designed to report the status of assisted reproductive technology (ART) therapy in South Korea between January 1, 2012 and December 31, 2012. METHODS: A localized online survey, originally developed by the International Committee Monitoring Assisted Reproductive Technologies, was first launched and provided to all available ART centers via email in 2015. Fresh embryo transfer (FET) cases were categorized as standard in vitro fertilization, intracytoplasmic sperm injection (ICSI), or half-ICSI...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428943/pathogenic-variant-in-nlrp7-19q13-42-associated-with-recurrent-gestational-trophoblastic-disease-data-from-early-embryo-development-observed-during-in-vitro-fertilization
#12
E Scott Sills, Alexandra J Obregon-Tito, Harry Gao, Thomas K McWilliams, Anthony T Gordon, Catharine A Adams, Rima Slim
OBJECTIVE: To describe in vitro development of human embryos derived from an individual with a homozygous pathogenic variant in NLRP7 (19q13.42) and recurrent hydatidiform mole (HM), an autosomal recessive condition thought to occur secondary to an oocyte defect. METHODS: A patient with five consecutive HM pregnancies was genomically evaluated via next generation sequencing followed by controlled ovarian hyperstimulation, in vitro fertilization (IVF) with intracytoplasmic sperm injection, embryo culture, and preimplantation genetic screening...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428942/follicular-fluid-cerebellin-and-betatrophin-regulate-the-metabolic-functions-of-growing-follicles-in-polycystic-ovary-syndrome
#13
Aynur Adeviye Ersahin, Mustafa Acet, Suat Suphan Ersahin, Tuba Acet, Meltem Yardim, Omer Kenanoglu, Suleyman Aydin
OBJECTIVE: The aim of this study was to assess the changes of follicular fluid (FF) and serum levels of cerebellin precursor protein 1 (cbln1) and betatrophin in patients with polycystic ovary syndrome (PCOS) undergoing in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) with a gonadotropin-releasing hormone (GnRH) antagonist protocol. METHODS: Twenty infertile women with PCOS and 20 control women diagnosed as poor responders undergoing ovarian stimulation with a GnRH antagonist were included...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428940/factors-influencing-sperm-retrieval-following-testicular-sperm-extraction-in-nonobstructive-azoospermia-patients
#14
Peyman Salehi, Marzieh Derakhshan-Horeh, Zakiye Nadeali, Majid Hosseinzadeh, Erfan Sadeghi, Mohammad Hossein Izadpanahi, Mansour Salehi
OBJECTIVE: Azoospermia owing to testicular disorders is the most severe manifestation of male infertility. The main concern for patients with nonobstructive azoospermia (NOA) is the probability of successful sperm retrieval following testicular sperm extraction (TESE). Therefore, the goal of this study was to determine predictive factors correlated with sperm retrieval. METHODS: We assessed the testicular histopathological patterns, the choice of TESE surgical procedure, hormone levels, and chromosomal abnormalities in patients with NOA (n=170)...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428939/effects-of-sperm-insemination-on-the-final-meiotic-maturation-of-mouse-oocytes-arrested-at-metaphase-i-after-in-vitro-maturation
#15
Jeong Yoon, Kyoung-Mi Juhn, San-Hyun Yoon, Yong Ko, Jin-Ho Lim
OBJECTIVE: The aims of this study were to investigate whether fertilization could induce the resumption of meiosis in mouse oocytes arrested at metaphase I (MI) after in vitro maturation (IVM), and to investigate the effect of Ca(2)(+) chelator treatment at the time of fertilization on the transition from MI to metaphase II (MII). METHODS: MII-stage and arrested MI-stage mouse oocytes after IVM were fertilized, and then embryonic development was monitored. Blastocysts from each group were transferred into 2...
March 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28428445/pectinase-treated-panax-ginseng-protects-heat-stress-induced-testicular-damage-in-rats
#16
Min Kyoung Kim, Kyu-Min Cha, Seock-Yeon Hwang, Un-Kyu Park, Seok Kyo Seo, Sang-Ho Lee, Min-Sik Jeong, SiHyun Cho, Spandana Rajendra Kopalli, Si-Kwan Kim
Testicular hyperthermia is well studied to cause impaired spermatogenesis. In the present study, the protective effect of enzymatically modified (pectinase-treated) Panax ginseng (GINST) against intermittent sub-chronic heat stress-induced testicular damage in rats was investigated. Male Sprague-Dawley rats were divided into four groups: normal control (NC), heat-stressed control (HC), heat-stressed plus GINST-100 mg/kg/day (HG100) and heat-stressed plus GINST-200 mg/kg/day (HG200) treatment groups. GINST (100 and 200 mg/kg/day) was mixed separately with a regular pellet diet and was administered orally for 8 weeks starting from 1 week before heat exposure...
June 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28428426/transgenerational-transmission-of-environmental-information-in-c-elegans
#17
Adam Klosin, Eduard Casas, Cristina Hidalgo-Carcedo, Tanya Vavouri, Ben Lehner
The environment experienced by an animal can sometimes influence gene expression for one or a few subsequent generations. Here, we report the observation that a temperature-induced change in expression from a Caenorhabditis elegans heterochromatic gene array can endure for at least 14 generations. Inheritance is primarily in cis with the locus, occurs through both oocytes and sperm, and is associated with altered trimethylation of histone H3 lysine 9 (H3K9me3) before the onset of zygotic transcription. Expression profiling reveals that temperature-induced expression from endogenous repressed repeats can also be inherited for multiple generations...
April 21, 2017: Science
https://www.readbyqxmd.com/read/28428259/rabl2-interacts-with-the-ift-b-complex-and-cep19-and-participates-in-ciliary-assembly
#18
Yuya Nishijima, Yohei Hagiya, Tomohiro Kubo, Ryota Takei, Yohei Katoh, Kazuhisa Nakayama
Proteins localized to the basal body and the centrosome play crucial roles in ciliary assembly and functions. Although RABL2 and CEP19 are conserved in ciliated organisms and have been implicated in ciliary/flagellar functions, their roles were poorly understood. We here showed that RABL2 interacts with CEP19 and is recruited to the mother centriole and basal body in a CEP19-dependent manner, and that CEP19 is recruited to the centriole probably via its binding to the centrosomal protein FGFR1OP. Disruption of the RABL2 gene in Chlamydomonas reinhardtii resulted in the non-flagellated phenotype, suggesting a crucial role of RABL2 in ciliary/flagellar assembly...
April 20, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28426717/adjusting-cryodiluent-composition-for-improved-post-thaw-quality-of-rabbit-spermatozoa
#19
Sally E Hall, Cameron Negus, Danielle Johinke, Roslyn Bathgate
Improved fertility following artificial insemination with frozen-thawed spermatozoa would offer rabbit producers faster genetic improvement. Previous work investigating cryoprotectants for rabbit spermatozoa have reported inconsistent results. Semen was collected from three rabbit bucks by artificial vagina and frozen using a standard procedure with varied cryodiluent components. Post-thaw analysis encompassed motility, sperm kinematic parameters and acrosome and membrane integrity. Spermatozoa were evaluated at 0, 2 and 4 h after thawing...
2017: PloS One
https://www.readbyqxmd.com/read/28425485/red-light-improves-spermatozoa-motility-and-does-not-induce-oxidative-dna-damage
#20
Daryl Preece, Kay W Chow, Veronica Gomez-Godinez, Kyle Gustafson, Selin Esener, Nicole Ravida, Barbara Durrant, Michael W Berns
The ability to successfully fertilize ova relies upon the swimming ability of spermatozoa. Both in humans and in animals, sperm motility has been used as a metric for the viability of semen samples. Recently, several studies have examined the efficacy of low dosage red light exposure for cellular repair and increasing sperm motility. Of prime importance to the practical application of this technique is the absence of DNA damage caused by radiation exposure. In this study, we examine the effect of 633 nm coherent, red laser light on sperm motility using a novel wavelet-based algorithm that allows for direct measurement of curvilinear velocity under red light illumination...
April 20, 2017: Scientific Reports
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