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https://www.readbyqxmd.com/read/28230818/post-chornobyl-remote-radiation-effects-on-human-sperm-and-seminal-plasma-characteristics
#1
S V Andreychenko, A V Klepko, L V Gorban, O A Motryna, L V Grubska, O V Trofimenko
AIM: The research was aimed on analysis of the remote consequences of Chornobyl accident on the reproductive function of men adult residing in Ukraine. MATERIALS AND METHODS: 232 male volunteers with mean age of 34 years (range 20-47) from 5 different regions of Ukraine (Zhytomyr, Ivano-Frankivsk, Kyiv, Poltava, and Kyiv city) were enrolled in cross-sectional studies of long term radiation effects on seminal plasma and sperm. All manipulations, analysis and classification of ejaculates were done accordingly to WHO recommendations...
December 2016: Experimental Oncology
https://www.readbyqxmd.com/read/28226241/catsper%C3%AE-regulates-the-structural-continuity-of-sperm-ca-2-signaling-domains-and-is-required-for-normal-fertility
#2
Jean-Ju Chung, Kiyoshi Miki, Doory Kim, Sang-Hee Shim, Huanan F Shi, Jae Yeon Hwang, Xinjiang Cai, Yusuf Iseri, Xiaowei Zhuang, David E Clapham
We report that the Gm7068 (CatSperε) and Tex40 (CatSperζ) genes encode novel subunits of a 9-subunit CatSper ion channel complex. Targeted disruption of CatSperζ reduces CatSper current and sperm rheotactic efficiency in mice, resulting in severe male subfertility. Normally distributed in linear quadrilateral nanodomains along the flagellum, the complex lacking CatSperζ is disrupted at ~0.8 μm intervals along the flagellum. This disruption renders the proximal flagellum inflexible and alters the 3D flagellar envelope, thus preventing sperm from reorienting against fluid flow in vitro and efficiently migrating in vivo...
February 22, 2017: ELife
https://www.readbyqxmd.com/read/28224638/assessment-of-human-sperm-dna-integrity-using-two-cytochemical-tests-acridine-orange-test-and-toluidine-blue-assay
#3
T Ajina, O Ammar, Z Haouas, A Sallem, L Ezzi, I Grissa, W Sakly, A Jlali, M Mehdi
Primary infertility affects approximately 15% of couples, with male factor infertility accounting for 50% of cases. Semen samples from 41 patients with asthenoteratospermia and 28 men with proven fertility were analysed according to World Health Organization guidelines. Abnormal sperm chromatin structure was assessed by toluidine blue assay (TBA), and DNA denaturation (DD) was detected by the acridine orange test (AOT). The mean (±SEM) rates of DD and abnormal chromatin structure were significantly higher in infertile subjects compared to fertile group respectively p = ...
February 22, 2017: Andrologia
https://www.readbyqxmd.com/read/28223936/two-pore-channels-catalyzers-of-endolysosomal-transport-and-function
#4
REVIEW
Christian Grimm, Cheng-Chang Chen, Christian Wahl-Schott, Martin Biel
Two-pore channels (TPCs) have recently emerged as a novel class of non-selective cation channels in the endolysosomal system. There are two members in the human genome, TPC1 and TPC2. Studies with TPC knockout and knockdown models have revealed that these channels participate in the regulation of multiple endolysosomal trafficking pathways which when dysregulated can lead to or influence the development of a range of different diseases such as lysosomal storage, metabolic, or infectious diseases. TPCs have been demonstrated to be activated by different endogenous stimuli, PI(3,5)P2 and NAADP, and ATP has been found to block TPC activation via mTOR...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28220153/high-throughput-flowing-upstream-sperm-sorting-in-a-retarding-flow-field-for-human-semen-analysis
#5
Jen-Kuei Wu, Peng-Chun Chen, Yu-Nan Lin, Chia-Woei Wang, Li-Chern Pan, Fan-Gang Tseng
In this paper, we propose a microfluidic device capable of generating a retarding flow field for the sorting and separation of human motile sperm in a high-throughput manner. The proposed sorting/separation process begins with a rapid flow field in a straight-flow zone to carry sperm into a sorting zone to maintain the sperm's mobility. The sorting zone consists of a diffuser-type sperm sorter to differentiate sperm with different motilities based on the flowing upstream nature of human sperm in a retarding flow field...
February 21, 2017: Analyst
https://www.readbyqxmd.com/read/28218625/egress-of-sperm-autoantigen-from-seminiferous-tubules-maintains-systemic-tolerance
#6
Kenneth S K Tung, Jessica Harakal, Hui Qiao, Claudia Rival, Jonathan C H Li, Alberta G A Paul, Karen Wheeler, Patcharin Pramoonjago, Constance M Grafer, Wei Sun, Robert D Sampson, Elissa W P Wong, Prabhakara P Reddi, Umesh S Deshmukh, Daniel M Hardy, Huanghui Tang, C Yan Cheng, Erwin Goldberg
Autoimmune responses to meiotic germ cell antigens (MGCA) that are expressed on sperm and testis occur in human infertility and after vasectomy. Many MGCA are also expressed as cancer/testis antigens (CTA) in human cancers, but the tolerance status of MGCA has not been investigated. MGCA are considered to be uniformly immunogenic and nontolerogenic, and the prevailing view posits that MGCA are sequestered behind the Sertoli cell barrier in seminiferous tubules. Here, we have shown that only some murine MGCA are sequestered...
February 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28216914/the-quality-of-sperm-preparation-medium-affects-the-motility-viability-and-dna-integrity-of-human-spermatozoa
#7
Fatemeh Anbari, Iman Halvaei, Ali Nabi, Shahin Ghazali, Mohammad Ali Khalili, Lars Johansson
AIM: The goal was to compare the effects of three different sperm preparation media on sperm motility, viability, and DNA integrity of semen samples from normozoospermic men. METHODS: A total of 15 normozoospermic males were included in the study. The semen analysis (SA) was performed in accordance with the WHO guidelines (2010). After SA, each sample was divided into three aliquots, and swim-up was performed with three different sperm preparation media (Sperm Preparation Media, Origio, Denmark; Ham's F10, Biochrome, Berlin, Germany; and VitaSperm™, Innovative Biotech, Iran)...
October 2016: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28216339/the-effect-of-tribulus-terrestris-extract-on-motility-and-viability-of-human-sperms-after-cryopreservation
#8
Atefeh Asadmobini, Mitra Bakhtiari, Sara Khaleghi, Farzaneh Esmaeili, Ali Mostafaei
BACKGROUND: Semen cryopreservation produces significant amounts of reactive oxygen species (ROS), which may lead to impairment of sperm morphology, function, and ultimately, male fertility. Since Tribulus terrestris has antioxidant and free-radical-scavenging properties, this study aims to reveal the effect of the Tribulus terrestris extract on motility and vitality of human sperms after cryopreservation. MATERIALS AND METHODS: Semen specimens from 80 healthy volunteers were divided into eight groups: fresh control (group I), freeze control (group II), groups III, IV, and V, which had 20, 40, and 50 μg/mL doses of Tribulus terrestris extract added before cryopreservation, and groups VI, VII, and VIII, which were supplemented by these extract doses after the freeze-thaw process...
February 16, 2017: Cryobiology
https://www.readbyqxmd.com/read/28215683/effects-of-hormonal-stimulation-on-the-concentration-and-quality-of-excreted-spermatozoa-in-the-critically-endangered-panamanian-golden-frog-atelopus-zeteki
#9
Gina Della Togna, Vance L Trudeau, Brian Gratwicke, Matthew Evans, Lauren Augustine, Han Chia, Edward J Bronikowski, James B Murphy, Pierre Comizzoli
Knowledge of basic gamete biology is critical to better protect and propagate endangered amphibian species and also to develop reproductive technologies combined with germplasm cryopreservation. The objectives of the study were to test different hormonal stimulations and then characterize the quantity and quality of Panamanian golden frog (Atelopus zeteki) spermatozoa. Following intraperitoneal injection of the gonadotropin-releasing hormone agonist (des-Gly(10), D-Ala(6), Pro-NHEt(9-)-GnRH 1, 2 or 4 μg/g of body weight), human chorionic gonadotropin (hCG; 5 or 10 IU/gbw), or Amphiplex™ (0...
March 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28213128/quantitative-proteomic-analysis-of-human-testis-reveals-system-wide-molecular-and-cellular-pathways-associated-with-non-obstructive-azoospermia
#10
Mehdi Alikhani, Mehdi Mirzaei, Marjan Sabbaghian, Pouria Parsamatin, Razieh Karamzadeh, Samane Adib, Niloofar Sodeifi, Mohammad Ali Sadighi Gilani, Masoud Zabet-Moghaddam, Lindsay Parker, Yunqi Wo, Vivek Gupta, Paul A Haynes, Hamid Gourabi, Hossein Baharvand, Ghasem Hosseini Salekdeh
: Male infertility accounts for half of the infertility problems experienced by couples. Azoospermia, having no measurable level of sperm in seminal fluid, is one of the known conditions resulting in male infertility. In order to elucidate the complex molecular mechanisms causing male azoospermia, label-free quantitative shotgun proteomics was carried out on testicular tissue specimens from patients with obstructive azoospermia and non-obstructive azoospermia, including maturation arrest (MA) and Sertoli cell only syndrome (SCOS)...
February 14, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28209492/reproductive-considerations-in-the-setting-of-chronic-viral-illness
#11
REVIEW
Brent M Hanson, Jessie A Dorais
Special considerations must be taken when patients with human immunodeficiency virus (HIV), Hepatitis B, or Hepatitis C desire to achieve pregnancy. Patients with chronic viral illnesses desire children at rates similar to the general population, and options are available to decrease both vertical transmission and viral transmission between partners. Preconception counseling or consultation with fertility specialists is imperative in patients with HIV, Hepatitis B, and Hepatitis C so that reproductive goals can be addressed and optimized...
February 13, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28208955/high-serum-estradiol-and-heavy-metals-responsible-for-human-spermiation-defect-a-pilot-study
#12
Manish Jain, Amanpreet Kaur Kalsi, Amita Srivastava, Yogendra Kumar Gupta, Ashutosh Halder
INTRODUCTION: Spermiation is a process of releasing sperm into the lumen of seminiferous tubules. Failure in releasing sperm into the lumen is designated as spermiation defect. Spermiation defect cases present as oligo-azoospermia or azoospermia despite normal gonadotropins and testicular histology/cytology. Human spermiation defect never got attention to investigate infertility practice. Most of the information on spermiation defect, so far is from animal experiments. We assume some cases of non-obstructive azoospermia with normal gonadotropins and testicular histology/cytology could be due to spermiation defect...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208851/2d-4d-ratio-and-its-implications-in-medicine
#13
Saravanakumar Jeevanandam, Prathibha K Muthu
Digit ratios, especially 2D:4D ratio, a potential proxy marker for prenatal androgen exposure shows sexual dimorphism. Existing literature and recent research show accumulating evidence on 2D:4D ratio showing correlations with various phenotypic traits in humans. Ratio of 2D:4D is found to correlate negatively to testosterone and positively to oestrogen in the foetus. Interestingly, it is constant since birth and not influenced by the adult hormone levels. Usually, males have lower ratios when compared to females...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28206990/a-familial-study-of-azoospermic-men-identifies-three-novel-causative-mutations-in-three-new-human-azoospermia-genes
#14
Moran Gershoni, Ron Hauser, Leah Yogev, Ofer Lehavi, Foad Azem, Haim Yavetz, Shmuel Pietrokovski, Sandra E Kleiman
PURPOSE: Up to 1% of all men experience azoospermia, a condition of complete absence of sperm in the semen. The mechanisms and genes involved in spermatogenesis are mainly studied in model organisms, and their relevance to humans is unclear because human genetic studies are very scarce. Our objective was to uncover novel human mutations and genes causing azoospermia due to testicular meiotic maturation arrest. METHODS: Affected and unaffected siblings from three families were subjected to whole-exome or whole-genome sequencing, followed by comprehensive bioinformatics analyses to identify mutations suspected to cause azoospermia...
February 16, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28193084/value-of-endometrial-echopattern-at-hcg-administration-day-in-predicting-ivf-outcome
#15
Firoozeh Ahmadi, Farnaz Akhbari, Mina Zamani, Fariba Ramezanali, Rezvaneh Cheraghi
BACKGROUND: Assisted reproductive  treatment  (ART)  cycle  is an  expensive  procedure with low implantation and pregnancy rate; therefore, it is necessary to evaluate the predictors of success in these patients. OBJECTIVE: The relationship between endometrial echopattern and pregnancy rate was evaluated. METHODS: The endometrial  echopattern  was  analyzed  prospectively  on  the  day  of  human chorionic  gonadotropin  (HCG) administration  in  280  in  vitro  fertilization/intracytoplasmic  sperm  injection (IVF/ICSI) cycles with 8-14 mm endometrial thickness at Royan institute in 2013-2014...
February 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28190421/sperm-gamma-aminobutyric-acid-type-a-receptor-delta-subunit-gabrd-and-its-interaction-with-purinergic-p2x2-receptors-in-progesterone-induced-acrosome-reaction-and-male-fertility
#16
Wenming Xu, Ke Wang, Yan Chen, Xiao Tong Liang, Mei Kuen Yu, Huanxun Yue, M Louise Tierney
The mechanism underlying the non-genomic action of progesterone in sperm functions and related Ca2+ mobilisation remains elusive. Herein we report the expression of gamma-aminobutyric acid type A receptor delta subunit (GABRD) in human and rodent sperm and its involvement in mediating the progesterone-induced acrosome reaction. GABRD was localised in the sperm head/neck region. A δ(392-422)-specific inhibitory peptide against GABRD blocked the progesterone-induced acrosome reaction and the associated increase in intracellular Ca2+...
February 13, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28187743/the-influence-of-macro-and-microelements-in-seminal-plasma-on-diluted-boar-sperm-quality
#17
Maja Zakošek Pipan, Janko Mrkun, Breda Jakovac Strajn, Katarina Pavšič Vrtač, Janko Kos, Anja Pišlar, Petra Zrimšek
BACKGROUND: Growing evidence indicates that macro- and microelements in the seminal plasma of humans and various domestic animals are of great importance due to their roles in sperm metabolism, function, survival and oxidative stress. In the present study, we therefore determined the concentrations of macro- and microelements in fresh boar seminal plasma and their relation to sperm quality parameters after 3 days of liquid storage was assessed. Twenty ejaculates from eight boars were collected, and semen volume, concentration, sperm motility, morphology, tail membrane integrity, plasma membrane permeability, mitochondrial membrane potential and DNA fragmentation were determined on the day of collection (day 0) and day 3 (72 h) of storage at 15-17 °C...
February 10, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28186187/factors-associated-with-aberrant-imprint-methylation-and-oligozoospermia
#18
Norio Kobayashi, Naoko Miyauchi, Nozomi Tatsuta, Akane Kitamura, Hiroaki Okae, Hitoshi Hiura, Akiko Sato, Takafumi Utsunomiya, Nobuo Yaegashi, Kunihiko Nakai, Takahiro Arima
Disturbingly, the number of patients with oligozoospermia (low sperm count) has been gradually increasing in industrialized countries. Epigenetic alterations are believed to be involved in this condition. Recent studies have clarified that intrinsic and extrinsic factors can induce epigenetic transgenerational phenotypes through apparent reprogramming of the male germ line. Here we examined DNA methylation levels of 22 human imprinted loci in a total of 221 purified sperm samples from infertile couples and found methylation alterations in 24...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28185602/impaired-hypothalamic-pituitary-testicular-axis-activity-spermatogenesis-and-sperm-function-promote-infertility-in-males-with-lead-poisoning
#19
Jason Gandhi, Rafael J Hernandez, Andrew Chen, Noel L Smith, Yefim R Sheynkin, Gargi Joshi, Sardar Ali Khan
Lead poisoning is a stealthy threat to human physiological systems as chronic exposure can remain asymptomatic for long periods of time before symptoms manifest. We presently review the biophysical mechanisms of lead poisoning that contribute to male infertility. Environmental and occupational exposure of lead may adversely affect the hypothalamic-pituitary-testicular axis, impairing the induction of spermatogenesis. Dysfunction at the reproductive axis, namely testosterone suppression, is most susceptible and irreversible during pubertal development...
February 10, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28182716/lyzl6-an-acidic-bacteriolytic-human-sperm-related-protein-plays-a-role-in-fertilization
#20
Peng Huang, Wenshu Li, Zhifang Yang, Ning Zhang, Yixin Xu, Jianying Bao, Deke Jiang, Xianping Dong
Lysozyme-like proteins (LYZLs) belong to the c-type lysozyme/α-lactalbumin family and are selectively expressed in the mammalian male reproductive tract. Two members, human sperm lysozyme-like protein (SLLP) -1 and mouse LYZL4, have been reported to contribute to fertilization but show no bacteriolytic activity. Here, we focused on the possible contribution of LYZL6 to immunity and fertilization. In humans, LYZL6 was selectively expressed by the testis and epididymis and became concentrated on spermatozoa...
2017: PloS One
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