keyword
MENU ▼
Read by QxMD icon Read
search

Sperm

keyword
https://www.readbyqxmd.com/read/29346308/tissue-engineering-to-improve-immature-testicular-tissue-and-cell-transplantation-outcomes-one-step-closer-to-fertility-restoration-for-prepubertal-boys-exposed-to-gonadotoxic-treatments
#1
REVIEW
Federico Del Vento, Maxime Vermeulen, Francesca de Michele, Maria Grazia Giudice, Jonathan Poels, Anne des Rieux, Christine Wyns
Despite their important contribution to the cure of both oncological and benign diseases, gonadotoxic therapies present the risk of a severe impairment of fertility. Sperm cryopreservation is not an option to preserve prepubertal boys' reproductive potential, as their seminiferous tubules only contain spermatogonial stem cells (as diploid precursors of spermatozoa). Cryobanking of human immature testicular tissue (ITT) prior to gonadotoxic therapies is an accepted practice. Evaluation of cryopreserved ITT using xenotransplantation in nude mice showed the survival of a limited proportion of spermatogonia and their ability to proliferate and initiate differentiation...
January 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29346023/fertility-preservation-in-pediatric-oncology-patients-new-perspectives
#2
Chiara Gertosio, Mariasole Magistrali, Paola Musso, Cristina Meazza, Mauro Bozzola
Over the past 30 years, advances in antineoplastic treatment led to a significant increase in the survival of patients with childhood cancer. In Europe and the United States, 82% of children, adolescents, and young adults survive 5 years from the cancer diagnosis and the majority achieves long-term survival into adulthood. The impact of cancer therapy on fertility is related to the age of the patient and to the duration, dose/intensity, and type of treatment. Exposure to chemotherapy or to radiation to gonads or pituitary brings long-term complications of cancer-directed therapies that include effects on reproductive capacity...
January 18, 2018: Journal of Adolescent and Young Adult Oncology
https://www.readbyqxmd.com/read/29345308/positive-size-speed-relationships-in-gametes-and-vegetative-cells-of-chlamydomonas-reinhardtii-implications-for-the-evolution-of-sperm
#3
Catherine E Seed, Joseph L Tomkins
It is commonly held that differences in gametes of the two sexes (anisogamy) evolved from ancestors whose gametes were similar in size and behaviour (isogamy). Underlying many hypotheses explaining anisogamy are assumed relationships between cell size and speed in the ancestral isogamous population. Using the isogamous alga Chlamydomonas reinhardtii, we explored size-speed distributions in vegetative and gamete cells of ten cell lines, and clonal data from within two cell lines. We applied an independent speed selection approach to gamete populations of C...
January 18, 2018: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29344208/serum-levels-of-anti-sperm-associated-antigen-9-antibody-are-elevated-in-patients-with-hepatocellular-carcinoma
#4
Biqiong Ren, Guoying Zou, Fei Xu, Yiran Huang, Guofeng Xu, Junyu He, Yong Li, Haowen Zhu, Ping Yu
At present, there is a high incidence of viral hepatitis and high mortality rates due to hepatocellular carcinoma (HCC) in China. In the current study, the quantification of antibodies against the cancer-testis antigen sperm-associated antigen 9 (SPAG9), alone and combined with α-fetoprotein (AFP), were evaluated as biomarkers for the diagnosis of HCC. The levels of anti-SPAG9 antibody and AFP were quantified in serum samples from patients with HCC and hepatitis or cirrhosis, as well as healthy volunteers...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29343909/decline-in-semen-parameters-from-2000-to-2016-among-bangladeshi-men-attending-a-tertiary-care-hospital
#5
Nusrat Mahmud, Eshita Sharmin, Md Arif Mamun, Zayan Shamayeen, Natalie Rivadeneira, Roger Rochat, Akanksha Mehta
Introduction: The objective of this study was to analyze longitudinal changes in sperm parameters of Bangladeshi men. We hypothesized that semen parameters declined for this population. Methods: We retrospectively analyzed semen data from men aged 18-64 years who sought care for general sperm quality or updates on fertility status at an infertility clinic in Dhaka, Bangladesh, from January 2000 to June 2016 (n = 13,953). Samples with incomplete data were excluded (n = 143)...
January 2018: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/29343824/human-papillomavirus-prophylactic-vaccination-improves-reproductive-outcome-in-infertile-patients-with-hpv-semen-infection-a-retrospective-study
#6
Andrea Garolla, Luca De Toni, Alberto Bottacin, Umberto Valente, Maurizio De Rocco Ponce, Andrea Di Nisio, Carlo Foresta
In this study we aimed to evaluate the effect on reproductive outcome of HPV vaccination in male subjects of infertile couples with HPV semen infection. In this single-center study, we retrospectively enrolled 151 infertile couples with detection of HPV in semen, attending our Hospital Unit of Andrology between January 2013 and June 2015, counseled to receive adjuvant HPV vaccination. Seventy-nine accepted vaccination (vaccine group) whilst 72 did not (control group). Our protocol of follow-up, aimed to evaluate HPV viral clearance, consisted in semen analysis, INNO-LiPA and FISH for HPV in semen cells after 6 and 12 months from basal evaluation...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343605/experimental-heatwaves-negatively-impact-sperm-quality-in-the-zebra-finch
#7
Laura L Hurley, Callum S McDiarmid, Christopher R Friesen, Simon C Griffith, Melissah Rowe
For sexually reproducing species, functionally competent sperm are critical to reproduction. While high atmospheric temperatures are known to influence the timing of breeding, incubation and reproductive success in birds, the effect of temperature on sperm quality remains largely unexplored. Here, we experimentally investigated the impact of ecologically relevant extreme temperatures on cloacal temperature and sperm morphology and motility in zebra finches Taeniopygia guttata We periodically sampled males exposed to 30°C or 40°C temperatures daily for 14 consecutive days...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29342175/immunocontraceptive-target-repertoire-defined-by-systematic-identification-of-sperm-membrane-alloantigens-in-a-single-species
#8
Nathaly Cormier, John J McGlone, John Leszyk, Daniel M Hardy
Sperm competence in animal fertilization requires the collective activities of numerous sperm-specific proteins that are typically alloimmunogenic in females. Consequently, sperm membrane alloantigens are potential targets for contraceptives that act by blocking the proteins' functions in gamete interactions. Here we used a targeted proteomics approach to identify the major alloantigens in swine sperm membranes and lipid rafts, and thereby systematically defined the repertoire of these sperm-specific proteins in a single species...
2018: PloS One
https://www.readbyqxmd.com/read/29341951/spermicidal-constituents-of-ethanolic-extract-of-sacoglottis-gabonensis-stem-bark
#9
Gideon O Alade, Jones O Moody, Olanrewaju R Awotona, Saburi A Adesanya, Daowan Lai, Peter Proksch
AIM: To isolate the spermicidal constituents of Sacoglottis gabonensis. MATERIALS AND METHODS: The ethanolic extract with partitioned fractions of Sacoglottis gabonensis stem bark were subjected to sperm immobilization assay. The most active EtOAc fraction was further purifi ed by column and Semi-Preparative High Performance Liquid Chromatography to give compounds which were characterized by spectroscopic methods (UV, LC/MS, and NMR). The compound(s) was also tested for sperm immobilization activity...
December 20, 2017: Folia Medica
https://www.readbyqxmd.com/read/29340252/positive-selection-on-human-gamete-recognition-genes
#10
Michael W Hart, Daryn A Stover, Vanessa Guerra, Sahar V Mozaffari, Carole Ober, Carina F Mugal, Ingemar Kaj
Coevolution of genes that encode interacting proteins expressed on the surfaces of sperm and eggs can lead to variation in reproductive compatibility between mates and reproductive isolation between members of different species. Previous studies in mice and other mammals have focused in particular on evidence for positive or diversifying selection that shapes the evolution of genes that encode sperm-binding proteins expressed in the egg coat or zona pellucida (ZP). By fitting phylogenetic models of codon evolution to data from the 1000 Genomes Project, we identified candidate sites evolving under diversifying selection in the human genes ZP3 and ZP2...
2018: PeerJ
https://www.readbyqxmd.com/read/29340093/leucine-mediates-autophagosome-lysosome-fusion-and-improves-sperm-motility-by-activating-the-pi3k-akt-pathway
#11
Jin Zhang, Xuemei Zhang, Yingjie Liu, Zihao Su, Farman Ullah Dawar, Hong Dan, Yan He, Jian-Fang Gui, Jie Mei
Amino acid supplementation is an efficient and effective strategy to increase sperm quality. In our research, a comparative study was conducted to screen free amino acids to improve sperm motility, and we found that leucine was the most efficient one. Leucine treatment increases sperm motility depending on the activation of PI3K/Akt signaling pathway, while the chemical inhibitor of PI3K/Akt signal could reduce the amount of pAkt activated by leucine treatment. Moreover, leucine treatment improved the expression of P62 and LC3-II, substantially suppressed the autophagy process in zebrafish testis...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339787/cilia-related-protein-spef2-regulates-osteoblast-differentiation
#12
Mari S Lehti, Henna Henriksson, Petri Rummukainen, Fan Wang, Liina Uusitalo-Kylmälä, Riku Kiviranta, Terhi J Heino, Noora Kotaja, Anu Sironen
Sperm flagellar protein 2 (SPEF2) is essential for motile cilia, and lack of SPEF2 function causes male infertility and primary ciliary dyskinesia. Cilia are pointing out from the cell surface and are involved in signal transduction from extracellular matrix, fluid flow and motility. It has been shown that cilia and cilia-related genes play essential role in commitment and differentiation of chondrocytes and osteoblasts during bone formation. Here we show that SPEF2 is expressed in bone and cartilage. The analysis of a Spef2 knockout (KO) mouse model revealed hydrocephalus, growth retardation and death prior to five weeks of age...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339528/gonadal-function-in-adult-male-patients-with-congenital-adrenal-hyperplasia
#13
Manon Engels, Katharina Gehrmann, Henrik Falhammar, Emma A Webb, Anna Nordenstrom, Fred Sweep, Paul N Span, Antonius Eduard van Herwaarden, Julia Rohayem, Annette Richter-Unruh, Claire Bouvattier, Birgit Koehler, Barbara B Kortmann, Wiebke Arlt, Nel Roeleveld, Nicole Reisch, Nike Stikkelbroeck, Hedi L Claahsen-van der Grinten
CONTEXT: Current knowledge on gonadal function in Congenital Adrenal Hyperplasia (CAH) is mostly limited to single center/country studies enrolling small patient numbers. Overall data indicate that gonadal function can be compromised in men with CAH. OBJECTIVE: To determine gonadal function in men with CAH within the European "dsd-LIFE" cohort. DESIGN: Cross-sectional clinical outcome study, including retrospective data from medical records...
January 16, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29339016/expression-of-sperm-plc%C3%AE-and-clinical-outcomes-of-icsi-aoa-in-men-affected-by-globozoospermia-due-to-dpy19l2-deletion
#14
Marziyeh Tavalaee, Michail Nomikos, F Anthony Lai, Mohammad Hossein Nasr-Esfahani
Globozoospermia is characterized by the presence of 100% acrosomeless round-headed spermatozoa in an ejaculate. Failed fertilization after intracytoplasmic sperm injection (ICSI) is commonly reported for globozoospermic couples and can be overcome by artificial oocyte activation (AOA). Phospholipase C zeta (PLCζ) is one of the main sperm factors involved in oocyte activation and its low expression levels mainly account for fertilization failure. Deletion of the DPY19L2 gene is reported as a main genetic cause in over 70% of infertile men with globozoospermia...
December 29, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29338138/could-cryopreserved-human-semen-samples-be-stored-at-80%C3%A2-c
#15
Carlos R Vaz, Tamara Lamim, Rafael A Salvador, Anna P B Batschauer, Vera Lucia L Amaral, David Til
OBJECTIVE: To evaluate storage time effects in cryopreserved human semen samples, kept in the freezer at a controlled temperature of -80°C, on sperm viability after thawing. METHODS: We used 20 semen samples. Each sample was cryopreserved in 10 fingers, which were divided into five groups: one group was kept in cryogenic canisters throughout the experiment(control), and four groups were kept in a VIP Ultra Low MDF-U76V- PE freezer, with the temperature set at -80°C, for 24, 48, 72 and 96 hours, respectively...
January 17, 2018: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/29337420/a-proinflammatory-response-of-bovine-endometrial-epithelial-cells-to-active-sperm-in-vitro
#16
Ahmed Essam Elweza, Mohamed Aboul Ezz, Tomas J Acosta, Anup K Talukder, Takashi Shimizu, Hiroyuki Hayakawa, Masayuki Shimada, Kazuhiko Imakawa, Ahmed Hamed Zaghloul, Akio Miyamoto
In the cow, cryopreserved semen is inseminated into the uterus, and most of sperm are removed by backflow and phagocytes. Nevertheless, the mechanism responsible for sperm phagocytosis is unclear. Here, we used cultured bovine uterine epithelial cells (BUECs) to investigate the uterine response to sperm and the mechanism that activates polymorphonuclear neutrophils (PMNs). BUEC monolayers were co-cultured with different numbers of washed sperm obtained from cryopreserved semen (104 , 105 and 106 sperm/ml) for 3 h...
January 16, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29337356/stabilizing-selection-on-sperm-number-revealed-by-artificial-selection-and-experimental-evolution
#17
Silvia Cattelan, Andrea Di Nisio, Andrea Pilastro
Sperm competition is taxonomically widespread in animals and is usually associated with large sperm production, being the number of sperm in the competing pool the prime predictor of fertilization success. Despite the strong postcopulatory selection acting directionally on sperm production, its genetic variance is often very high. This can be explained by trade-offs between sperm production and traits associated with mate acquisition or survival, that may contribute to generate an overall stabilizing selection...
January 16, 2018: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29337043/membrane-permeable-rab27a-is-a-regulator-of-the-acrosome-reaction-role-of-geranylgeranylation-and-guanine-nucleotides
#18
Matías A Bustos, Ornella Lucchesi, María C Ruete, Claudia N Tomes
The acrosome reaction is the regulated exocytosis of mammalian sperm's single secretory granule, essential for fertilization. It relies on small GTPases, the cAMP binding protein Epac, and the SNARE complex, among other components. Here, we describe a novel tool to investigate Rab27-related signaling pathways: a hybrid recombinant protein consisting of human Rab27A fused to TAT, a cell penetrating peptide. With this tool, we aimed to unravel the connection between Rab3, Rab27 and Rap1 in sperm exocytosis and to deepen our understanding about how isoprenylation and guanine nucleotides influence the behaviour of Rab27 in exocytosis...
January 11, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29336995/a-search-for-molecular-mechanisms-underlying-male-idiopathic-infertility
#19
REVIEW
An Bracke, Kris Peeters, Usha Punjabi, David Hoogewijs, Sylvia Dewilde
Infertility affects approximately 15% of the couples wanting to conceive. In 30 - 40% of the cases the aetiology of male infertility remains unknown and is called idiopathic male infertility. When assisted reproductive technologies are used to obtain pregnancy, an adequate (epi)genetic diagnosis of male infertility is of major importance to evaluate if a genetic abnormality will be transmitted to the offspring. In addition, there is need for better diagnostic seminal biomarkers to assess the success rates of these assisted reproductive technologies...
December 27, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29336863/age-associated-expression-of-vitamin-d-receptor-and-vitamin-d-metabolizing-enzymes-in-the-male-reproductive-tract-and-sperm-of-hu-sheep
#20
Xiaolei Yao, M A Ei-Samahy, Hua Yang, Xu Feng, Fengzhe Li, Fanxing Meng, Haitao Nie, Feng Wang
The cellular response to 1,25-dihydroxyvitamin D3 (Vit D3; biologically active form of Vitamin D) is complex and depends not only on Vitamin D receptor (VDR) expression but also on cellular uptake of circulating Vit D3 and the presence and activity of Vitamin D-metabolizing enzyme. This study evaluated the expression of VDR and Vitamin D-metabolizing enzymes in the ram reproductive tract at different developmental stages and in spermatozoa. Nearly all cell types in the testes and epithelial cells of the caput, corpus, and cauda expressed VDR, CYP27B1, and CYP24A1 proteins...
January 10, 2018: Animal Reproduction Science
keyword
keyword
22404
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"