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https://www.readbyqxmd.com/read/29156341/urinary-bisphenol-a-concentrations-are-associated-with-reproductive-parameters-in-young-men
#1
Evdochia Adoamnei, Jaime Mendiola, Fernando Vela-Soria, Mariana F Fernández, Nicolás Olea, Niels Jørgensen, Shanna H Swan, Alberto M Torres-Cantero
Bisphenol A (BPA) is a pervasive environmental toxicant with known reproductive effects on sperm parameters and hormone levels. Several observational studies have investigated the associations between BPA exposure and male reproductive function, but findings are inconsistent. The objective of this study was to assess the associations between urinary BPA concentrations and semen quality and reproductive hormone levels in a cross-sectional study with 215 healthy young university students (18-23 years old), investigated between 2010 and 2011 in Southern Spain (Murcia Region)...
November 17, 2017: Environmental Research
https://www.readbyqxmd.com/read/29152699/comparative-analysis-of-the-protective-effects-of-curcumin-and-n-acetyl-cysteine-against-paracetamol-induced-hepatic-renal-and-testicular-toxicity-in-wistar-rats
#2
Zeynab Kh El-Maddawy, Yasser S El-Sayed
This study aimed to investigate the possible protective role of curcumin (CUR) vs. N-acetyl cysteine (NAC) against paracetamol (PCM)-induced oxidative damage and impairment of liver, kidney, and testicular functions, as well as hematotoxicity, in albino rats. A large single dose of PCM induced lipid peroxidation along with a significant decline in glutathione content and catalase activity in the liver, kidneys, and testicles. The apparent oxidative damage was associated with evident hepatic, renal, and testicular dysfunction, which was confirmed in histopathological lesions, and increased serum aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase activities...
November 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29152689/role-of-wnt-signaling-in-epididymal-sperm-maturation
#3
Jin-Mei Cheng, Ji-Xin Tang, Jian Li, Yu-Qian Wang, Xiu-Xia Wang, Yan Zhang, Su-Ren Chen, Yi-Xun Liu
PURPOSE: Spermatozoa maturation, a process required for spermatozoa to acquire progressive motility and the ability to fertilize ova, primarily occurs in the caput and corpus of the epididymis. Despite considerable efforts, the factor(s) promoting epididymal sperm maturation remains unclear. Recently, WNT signaling has been implicated in epididymal sperm maturation. METHODS: To further investigate WNT signaling function in epididymal sperm maturation, we generated Wntless conditional knockout mice (Wls cKO), Wls (flox/flox) ; Lcn5-Cre...
November 20, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29151164/correction-to-hdac6-deacetylates-alpha-tubulin-in-sperm-and-modulates-sperm-motility-in-holtzman-rat
#4
Sweta Parab, Omshree Shetty, Reshma Gaonkar, Nafisa Balasinor, Vrinda Khole, Priyanka Parte
The published online version contains mistake. The chimeric peptide should read as 'DPSVLYVSLHRYGGYMNEGELRV'. It was inadvertently written as 'DPSVLYVSLYVSLHRYGGYMNEGELR' a mistake which we missed during proof reading.
November 18, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29150942/a-novel-epididymal-quiescence-factor-inhibits-sperm-motility-by-modulating-nos-activity-and-intracellular-no-cgmp-pathway
#5
Prasanta Ghosh, Sandipan Mukherjee, Arpita Bhoumik, Sandhya Rekha Dungdung
Mature and potentially motile spermatozoa stored in cauda epididymis in an inactive state for approximately 30 days; however during ejaculation they regain motility. To understand the actual molecular mechanism of the sperm quiescence during caudal stay, a proteinaceous quiescence factor (QF) has been purified from caprine epididymal plasma to apparent homogeneity. In the present study complete purification, detailed characterization as well as mechanistic pathway of QF has been described. QF was purified to 215 fold with 45% activity recovery...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29150736/effect-of-erythrocyte-sperm-separation-medium-on-nuclear-acrosomal-and-membrane-maturity-parameters-in-human-sperm
#6
Bikem Soygur, Soner Celik, Ciler Celik-Ozenci, Leyla Sati
PURPOSE: The purpose of this study is to investigate whether erythrocyte-sperm separation medium (ESSM) has effects on human sperm motility, morphology, viability, membrane maturity, acrosome integrity, and nuclear attributes before and after cryopreservation. METHODS: Semen samples from normozoospermic (n = 36) and oligozoospermic (n = 9) patients were analyzed. Samples from the same patient were divided into three aliquots: group 1 and group 2 were resuspended in sperm washing media and ESSM, respectively...
November 18, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29149713/adult-exposure-to-bisphenol-a-in-rare-minnow-gobiocypris-rarus-reduces-sperm-quality-with-disruption-of-testicular-aquaporins
#7
Yingying Zhang, Yongjing Guan, Ting Zhang, Cong Yuan, Yan Liu, Zaizhao Wang
Bisphenol A (BPA) is an endocrine disrupter which has adverse effects on male reproduction. Aquaporins (AQPs), well known water-selective channels, play important roles in spermatogenesis and sperm functions. However, whether AQPs participate in the process that BPA induces abnormal sperms has not been investigated to date. In the present study, adult male rare minnows Gobiocypris rarus were exposed to environmentally relevant concentrations BPA (15 and 225 μg/L) for 1, 2 and 3 weeks. Results showed that BPA exposure disrupted sperm motility, increased the percentage of abnormal sperm cells, and decreased sperm tolerance to hypotonic solution and sperm fertilization capacity...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29149484/comparative-analysis-of-proteomes-between-diabetic-and-normal-human-sperm-insights-into-the-effects-of-diabetes-on-male-reproduction-based-on-the-regulation-of-mitochondria-related-proteins
#8
Tian An, Yue-Fen Wang, Jia-Xian Liu, Yan-Yun Pan, Yu-Fei Liu, Zhong-Chen He, Fang-Fang Mo, Jun Li, Li-Hua Kang, Yu-Jie Gu, Bo-Han Lv, Si-Huan Gao, Guang-Jian Jiang
This study sought to identify sources of the reduced fertility of men with type 2 diabetes mellitus. Significant reductions in semen volume, sperm concentration, and total sperm count were observed in diabetic individuals, while transmission electron microscopy revealed that the structure of mitochondria in the tail of sperm from diabetic patients was damaged. Proteins potentially associated with these sperm defects were identified using proteomics. Isobaric tagging for relative and absolute quantitation labeling and high-performance liquid chromatography-tandem mass spectrometry allowed us to identify 357 proteins significantly differentially expressed in diabetic versus control semen (>1...
November 17, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29149062/polyphenolics-from-albizia-harveyi-exhibit-antioxidant-activities-and-counteract-oxidative-damage-and-ultra-structural-changes-of-cryopreserved-bull-semen
#9
Mansour Sobeh, Soha A Hassan, Mohamed A El Raey, Wael A Khalil, Mahmoud A E Hassan, Michael Wink
Albizia harveyi is a tropical deciduous tree, found across South and Eastern Africa and widely used in traditional medicine. The leaf extract ameliorated the damaging effects of the frozen-thawing process in cryopreserved bull semen. In a dose-dependent pattern, sperm motility, viability, and membrane integrity were improved compared to the untreated control. Furthermore, the extract increased the percentage of viable sperm cells and reduced the percentages of early apoptotic and apoptotic sperm cells as well as the damage in sperm ultra-structure...
November 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29148981/walnut-leaf-extract-acts-as-a-fertility-agent-in-male-wistar-albino-rats-a-search-for-herbal-male-fertility-enhancer
#10
Seun F Akomolafe, Ganiyu Oboh
Background Walnut leaf is one of the many medicinal plants used in folklore as male fertility enhancers. The present work was therefore undertaken with an aim to scientifically validate this claim. As such, we evaluated the effect of the aqueous extract from walnut leaves on biomolecules related to fertility in adult male rats and its mode of action as fertility-enhancing agent. Methods Twenty-five rats were randomly divided into five groups of five animals each; Group 1 served as control and received normal (0...
November 17, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/29148792/proteomic-markers-of-the-functional-sperm-population-in-bovines-1-comparison-of-low-and-high-density-spermatozoa-following-cryopreservation
#11
Olivier D'Amours, Gilles Frenette, Sylvie Bourassa, Ezequiel Calvo, Patrick Blondin, Robert Sullivan
Mammalian semen contains a heterogeneous population of sperm cells. This heterogeneity results from variability in the complex processes of cell differentiation in the testis, biochemical modifications undergone by spermatozoa during transit along the male reproductive tract, interactions with secretions from accessory sex glands at ejaculation, and, in the context of reproductive technologies, in the ability of ejaculated spermatozoa to resist damage associated with freeze-thaw procedures. When submitted to density gradient centrifugation, ejaculated spermatozoa distribute themselves into two distinct populations: a low-density population characterized by low motility parameters, and a high-density population with high motility characteristics...
November 17, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29147981/low-atrazine-dosages-reduce-sperm-quality-of-calomys-laucha-mice
#12
Graciela Quintana Saalfeld, Antônio Sergio Varela Junior, Tiane Castro, Fernanda Alves Pereira, Stela Mari Meneghello Gheller, Alessandra Cardoso da Silva, Carine Dahl Corcini, Carlos Eduardo da Rosa, Elton Pinto Colares
Reproductive effects caused by the exposure to environmentally relevant dosages of atrazine on wild animals are poorly understood. This study evaluated the effects of three dosages of atrazine on sperm parameters of adult Calomys laucha males. Adult mice were orally exposed to dosages of 0 (water and vehicle control), 0.1, 1, and 10 mg/kg of animal weight for a 21-day period. Following exposure, analyses were performed to determine sperm motility parameters, plasma membrane integrity and fluidity, mitochondrial functionality, acrosome integrity, DNA damage, lipid peroxidation, and production of reactive oxygen species (ROS) in the sperm samples...
November 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29146065/post-thaw-boar-sperm-motility-is-affected-by-prolonged-storage-of-sperm-in-liquid-nitrogen-a-retrospective-study
#13
Junwei Li, Inmaculada Parrilla, Maria D Ortega, Emilio A Martinez, Heriberto Rodriguez-Martinez, Jordi Roca
Owing to the quick genetic turnover of the pig industry, most AI-boar sires live 2-3 yr, a period during which for 1-2 yr their semen is extended and used in liquid form for AI. Despite showing low cryosurvival, affecting fertility after AI, boar semen is frozen for easiness of transport overseas and reposition of valuable genetics. For the latter, semen is stored in liquid nitrogen (LN2, cryostorage) for many years, a controversial practice. Here we studied how length of cryostorage could affect sperm quality...
November 13, 2017: Cryobiology
https://www.readbyqxmd.com/read/29145645/waddlia-chondrophila-a-chlamydia-related-bacterium-has-a-negative-impact-on-human-spermatozoa
#14
D Baud, N Vulliemoz, A Ammerdorffer, J Gyger, G Greub, V Castella, M Stojanov
STUDY QUESTION: What is the impact of Waddlia chondrophila, an emerging Chlamydia-related bacterium associated with miscarriage, on human spermatozoa? SUMMARY ANSWER: W. chondrophila had a negative impact on human spermatozoa (decrease in viability and mitochondrial membrane potential) and was not entirely removed from infected samples by density gradient centrifugation. WHAT IS KNOWN ALREADY: Bacterial infection or colonization might have a deleterious effect on male fertility...
November 14, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29143963/expression-of-paraoxonase-types-1-2-and-3-in-reproductive-tissues-and-activity-of-paraoxonase-type-1-in-the-serum-and-seminal-plasma-of-bulls
#15
C E R Ferreira, C S Haas, K L Goularte, M T Rovani, F F Cardoso, A Schneider, B G Gasperin, T Lucia
The paraoxonases types 1, 2 and 3 (PON1, PON2 and PON3, respectively) are enzymes that degrade lipid peroxides, preventing oxidative damages relevant for male reproductive function. This study determined the expression of those three paraoxonases in reproductive tissues of bulls and evaluated correlations among the activity of PON1 in the serum and seminal plasma with breeding soundness parameters in bulls. The expression of PON1, PON2 and PON3 was characterised by RT-PCR in samples of testicular parenchyma, vesicular glands and epididymis collected from three slaughtered bulls...
November 16, 2017: Andrologia
https://www.readbyqxmd.com/read/29143943/the-impact-of-ejaculatory-abstinence-on-semen-analysis-parameters-a-systematic-review
#16
REVIEW
Brent M Hanson, Kenneth I Aston, Tim G Jenkins, Douglas T Carrell, James M Hotaling
OBJECTIVE: The aim of this study was to evaluate recent publications and determine the impact of ejaculatory abstinence on semen analysis parameters as well as fertility outcomes. METHODS: This was a systematic review of 28 recent publications. The focus of this study was the impact of abstinence on semen parameters and fertility outcomes in papers published since the year 2000. The specific parameters evaluated were volume, sperm count, motility, morphology, pH, DNA fragmentation rate, viability, and pregnancy or fertilization rates following assisted reproduction...
November 16, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29143242/comparing-reactive-oxygen-species-and-dna-fragmentation-in-semen-samples-of-unexplained-infertile-and-healthy-fertile-men
#17
Zahra Zandieh, Akram Vatannejad, Mahmood Doosti, Sara Zabihzadeh, Mahnaz Haddadi, Leila Bajelan, Batool Rashidi, Saeid Amanpour
BACKGROUND: Male factor infertility has increased to more than 40% during the last decade. About 30% of these couples are diagnosed with unexplained infertility. In fact, reactive oxygen species (ROS), especially superoxide anion (O2(-)·) and hydrogen peroxide (H2O2), play a crucial role in regulation of physiological and pathological processes in spermatozoa. Moreover, since the diagnosis of unexplained infertility just through semen analysis is a matter of much controversy; we aimed to evaluate the levels of ROS and sperm DNA fragmentation in the semen samples of unexplained infertile and fertile control couples...
November 15, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29141997/crispr-cas9-mediated-genome-editing-reveals-the-synergistic-effects-of-%C3%AE-defensin-family-members-on-sperm-maturation-in-rat-epididymis
#18
Chaobao Zhang, Yuchuan Zhou, Shengsong Xie, Qianqian Yin, Chunhua Tang, Zimei Ni, Jian Fei, Yonglian Zhang
The epididymis is a male reproductive organ involved in posttesticular sperm maturation and storage, but the mechanism underlying sperm maturation remains unclear. β-Defensins (Defbs) belong to a family of small, cysteine-rich, cationic peptides that are antimicrobial and modulate the immune response. A large number of Defb genes are expressed abundantly in the male reproductive tract, especially in the epididymis. We and other groups have shown the involvement of several Defb genes in regulation of sperm function...
November 15, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29138814/grape-seed-proanthocyanidin-extract-attenuates-varicocele%C3%A2-induced-testicular-oxidative-injury-in-rats-by-activating-the-nrf2%C3%A2-antioxidant-system
#19
Yong Wang, Fan Chen, Ming Liang, Shouzhen Chen, Yaofeng Zhu, Zhichuan Zou, Benkang Shi
The present study investigated whether grape seed proanthocyanidin extract (GSPE) can attenuate varicocele‑induced testicular oxidative injury through the nuclear factor (erythroid‑derived 2)‑like 2 (Nrf2) antioxidant pathway. A varicocele model in rats was established by partial ligation of the left renal vein. Following 4 weeks of GSPE administration, the decreased sperm count and motility and other pathological changes caused by varicocele were significantly alleviated, as indicated by the results of computer‑assisted sperm analysis and hematoxylin and eosin staining...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29136399/proteinaceous-sperm-motility-inhibitory-factor-from-the-female-indian-garden-lizard-calotes-versicolor
#20
Goutham Shankar, Shubhashree Uppangala, Satish K Adiga, Belinda Willard, Bhadravathi K C Sagar, Ruth S K Titus, Gopal K Marathe
Female sperm storage is an intriguing adaptation exhibited by a wide array of both vertebrates and invertebrates. The mechanisms underlying female sperm storage have remained elusive. Using the Indian garden lizard Calotes versicolor as a model organism, we investigated the role of low and high molecular weight factors in this phenomenon. Previously, we demonstrated three distinct phases of the reproductive cycle in this animal with live, motile spermatozoa recovered from the uterovaginal region during the reproductive phase...
November 15, 2017: Reproduction, Fertility, and Development
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