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https://www.readbyqxmd.com/read/28742876/expression-of-uncharacterized-male-germ-cell-specific-genes-and-discovery-of-novel-sperm-tail-proteins-in-mice
#1
Jun Tae Kwon, Sera Ham, Suyeon Jeon, Youil Kim, Seungmin Oh, Chunghee Cho
The identification and characterization of germ cell-specific genes are essential if we hope to comprehensively understand the mechanisms of spermatogenesis and fertilization. Here, we searched the mouse UniGene databases and identified 13 novel genes as being putatively testis-specific or -predominant. Our in silico and in vitro analyses revealed that the expressions of these genes are testis- and germ cell-specific, and that they are regulated in a stage-specific manner during spermatogenesis. We generated antibodies against the proteins encoded by seven of the genes to facilitate their characterization in male germ cells...
2017: PloS One
https://www.readbyqxmd.com/read/28741131/meiotic-chromosome-behavior-of-the-male-fertile-allotriploid-lily-cultivar-cocossa
#2
Xiqing Zhang, Qinzheng Cao, Peng Zhou, Guixia Jia
Cytological observations of microsporogenesis in the allotriploid lily cultivar 'Cocossa' showed that viable pollen production could be attributed mainly to disoriented spindles, abnormal cytokinesis, and cytomixis during male meiosis. To identify the reasons why the allotriploid lily cultivar 'Cocossa' can produce aneuploid and euploid functional male gametes and can be used as the paternal parent in lily introgression breeding, we performed a detailed investigation of microsporogenesis using the conventional cytological methods...
July 24, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28739435/ureaplasma-spp-in-male-infertility-and-its-relationship-with-semen-quality-and-seminal-plasma-components
#3
Yun Heng Zhou, Hong Xia Ma, Xiao Xing Shi, Yang Liu
OBJECTIVE: We investigated the prevalence of Ureaplasma spp. in semen samples of infertile men in Shanghai, China and evaluated the correlation between the sperm parameters (seminal volume, sperm concentration, progressive motility and non-progressive) and the secretary function in these infectious populations. METHODS: Semens were collected from 540 infertile men and 260 fertile control group in shanghai, China and subjected to standard bacterial and Ureaplasma spp...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28739117/update-on-fertility-preservation-from-the-barcelona-international-society-for-fertility-preservation-eshre-asrm-2015-expert-meeting-indications-results-and-future-perspectives
#4
Francisca Martinez
STUDY QUESTION: What progress has been made in fertility preservation (FP) over the last decade? SUMMARY ANSWER: FP techniques have been widely adopted over the last decade and therefore the establishment of international registries on their short- and long-term outcomes is strongly recommended. WHAT IS KNOWN ALREADY: FP is a fundamental issue for both males and females whose future fertility may be compromised. Reproductive capacity may be seriously affected by age, different medical conditions and also by treatments, especially those with gonadal toxicity...
July 20, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28736861/azadirachtin-effects-on-mating-success-gametic-abnormalities-and-progeny-survival-in-drosophila-melanogaster-diptera
#5
Chemseddine M Oulhaci, Béatrice Denis, Samira Kilani-Morakchi, Jean-Christophe Sandoz, Laure Kaiser, Dominique Joly, Nadia Aribi
BACKGROUND: Azadirachtin is a prominent natural pesticide and represents an alternative to conventional insecticides. It has been successfully used against insect pests. However, its effects on reproduction require further analysis. Here we investigated lethal and sublethal effects of azadirachtin, on treated adults in a model insect, Drosophila melanogaster (Meigen). Dose-mortality relationships as well as several parameters of reproduction (mating, spermatogenesis, oogenesis and fertility) were examined...
July 24, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28735888/differential-expression-of-subunits-of-20%C3%AE-hydroxysteroid-dehydrogenase-during-gametogenesis-in-rainbow-trout-oncorhychus-mykiss
#6
Arya Vazirzadeh, Yann Guiguen
The patterns of expression of two subunits of 20β-hydroxysteroid dehydrogenase (20β-HSD), key enzyme involved in the biosynthesis and activation of steroid hormones, were examined in rainbow trout by using a combination of quantitative real-time PCR and in-situ hybridization. The expression of targeted genes was examined in mRNA extracted from different tissues at different gonadal stages in male and female trout. Both subunits of 20β-HSD were found to be widely distributed in tissues. The highest expression of 20β-HSD A was found in intestine followed by skin, stomach, liver and gills, whereas, the highest expression of 20β-HSD B was observed in stomach followed by head kidney, ovary - at late vitellogenesis stage- and trunk kidney...
July 14, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28734133/physicians-self-reported-practice-behaviour-regarding-fertility-related-discussions-in-paediatric-oncology-in-sweden
#7
G M Armuand, J Nilsson, K A Rodriguez-Wallberg, J Malmros, J Arvidson, C Lampic, L Wettergren
OBJECTIVE: The aim of this study was to investigate practice behaviours of Swedish physicians with regard to discussing the impact of cancer treatment on fertility with paediatric oncology patients and their parents, and to identify factors associated with such discussions. METHODS: A cross-sectional survey study was conducted targeting all physicians in Sweden working in paediatric oncology care settings. Participants responded to a questionnaire measuring practice behaviour, attitudes, barriers, and confidence in knowledge...
July 22, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28733816/relative-weighting-of-acoustic-information-during-mating-decisions-in-grasshoppers-indicates-signatures-of-sexual-selection
#8
Jan Clemens, Jennifer Aufderheide, Bernhard Ronacher
The decision with whom to mate is crucial in determining an individual's fitness and is often based on the evaluation of visual or acoustic displays produced during courtship. Accordingly, the algorithms for evaluating such courtship signals are shaped by sexual selection and should reflect the expected benefits and costs of mating: signals bearing heterospecific features should be rapidly rejected, since mating would produce no fertile offspring, while signals resembling conspecific ones should be weighted proportional to mate quality...
July 21, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28733712/fertility-and-ploidy-of-gametes-of-allodiploid-and-allotriploid-loaches-produced-by-diploid-misgurnus-anguillicaudatus-females-and-paramisgurnus-dabryanus-males
#9
Songqian Huang, Xiaojuan Cao, Weimin Wang, Mona Nasr
Artificial and natural hybridization of dojo loach Misgurnus anguillicaudatus (2N = 50, DD for short) and large-scale loach Paramisgurnus dabryanus (2N = 48, PP for short) are well-grown. However, these hybrid loaches have not yet been examined for fertility and ploidy of gametes. Here, histological observations, artificial propagation, observations of embryonic development, larval morphology, and ploidy analyses were conducted to determine the fertility and ploidy of gametes of allodiploid (DP for short) and allotriploid (DDP for short) loaches, produced by DD females × PP males and induced from fertilized eggs of DD females × PP males by cold shock to prevent the second polar body release, respectively...
July 21, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28727069/system-dynamics-modeling-in-designing-breeding-schemes-the-case-of-menz-sheep-in-ethiopian-highlands
#10
K T Gebre, M Wurzinger, S Gizaw, A Haile, B Rischkowsky, T Getachew, J Sölkner
A comprehensive dynamic simulation model was developed to describe a community-based breeding program for the Menz sheep population of Ethiopia. Selection of male and female animals based on their own and maternal performance was simulated. The breeding goal traits were 6-mo weight, preweaning survival, and fertility rate. The model input data were obtained from the flock book, questionnaires, and references. The simulation model used a mix of deterministic and stochastic procedures to model the complex system...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726302/a-multicenter-study-to-evaluate-oxidative-stress-by-oxidation-reduction-potential-a-reliable-and-reproducible-method
#11
A Agarwal, M Arafa, R Chandrakumar, A Majzoub, S AlSaid, H Elbardisi
Seminal oxidative stress (OS) is well-known to affect male fertility status. The discrepancy in OS measurement has hindered its clinical use as a quality indicator for semen. Some tests measured single markers of oxidants or reductants, leading to lack of standardization of results. Oxidation-reduction potential (ORP) is a better representative for OS as it provides an overall measure of the activity of both oxidants and reductants. ORP assessment by MiOXSYS has been introduced as a measure of OS with high specificity in differentiating fertile from infertile semen samples...
July 20, 2017: Andrology
https://www.readbyqxmd.com/read/28726202/experimental-assessment-of-the-effect-of-kagocel-on-reproductive-function-in-pubertal-male-rats
#12
T G Borovskaya, M E Poluektova, A V Vychuzhanina, V A Mashanova, Yu A Shchemerova
We studied possible toxic effects of antiviral drug Kagocel on reproductive function in pubertal male rats. The drug was administered in therapeutic and 10-fold higher doses throughout the spermatogenesis cycle (48 days). Kagocel did not reduce mating and fertilizing capacities, did not suppress spermatogenesis, and had no toxic effects on the offspring. The results characterize Kagocel as a drug with a broad reproductive safety profile and demonstrate that the age limits for using Kagocel in pediatric practice can be extended...
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28725387/origins-of-two-hemiclonal-hybrids-among-three-hexagrammos-species-teleostei-hexagrammidae-genetic-diversification-through-host-switching
#13
Hiroyuki Munehara, Miho Horita, Motoko R Kimura-Kawaguchi, Aya Yamazaki
Two natural, hemiclonal hybrid strains were discovered in three Hexagrammos species. The natural hybrids, all of which were females that produced haploid eggs containing only the Hexagrammos octogrammus genome (maternal ancestor; hereafter Hoc), generated F1 hybrid-type offspring by fertilization with haploid sperm of Hexagrammos agrammus or Hexagrammos otakii (paternal species; Hag and Hot, respectively). This study was performed to clarify the extent of diversification between the two hybrids and the maternal ancestor...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28725099/changes-in-employment-uncertainty-and-the-fertility-intention-realization-link-an-analysis-based-on-the-swiss-household-panel
#14
Doris Hanappi, Valérie-Anne Ryser, Laura Bernardi, Jean-Marie Le Goff
How do changes in employment uncertainty matter for fertility? Empirical studies on the impact of employment uncertainty on reproductive decision-making offer a variety of conclusions, ranging from gender and socio-economic differences in the effect of employment uncertainty on fertility intentions and behaviour, to the effect of employment on changes in fertility intentions. This article analyses the association between a change in subjective employment uncertainty and fertility intentions and behaviour by distinguishing male and female partners' employment uncertainty, and examines the variation in these associations by education...
2017: European Journal of Population
https://www.readbyqxmd.com/read/28724687/direct-and-trans-generational-effects-of-male-and-female-gut-microbiota-in-drosophila-melanogaster
#15
Juliano Morimoto, Stephen J Simpson, Fleur Ponton
There is increasing evidence of the far-reaching effects of gut bacteria on physiological and behavioural traits, yet the fitness-related consequences of changes in the gut bacteria composition of sexually interacting individuals remain unknown. To address this question, we manipulated the gut microbiota of fruit flies, Drosophila melanogaster, by monoinfecting flies with either Acetobacter pomorum (AP) or Lactobacillus plantarum (LP). Re-inoculated individuals were paired in all treatment combinations. LP-infected males had longer mating duration and induced higher short-term offspring production in females compared with AP-infected males...
July 2017: Biology Letters
https://www.readbyqxmd.com/read/28724622/transcription-factor-myb26-is-key-to-spatial-specificity-in-anther-secondary-thickening-formation
#16
Caiyun Yang, Jie Song, Alison Ferguson, Doris Klisch, Kim Simpson, Rui Mo, Benjamin Taylor, Zoe A Wilson
Successful fertilisation relies on the production and effective release of viable pollen. Failure of anther opening (dehiscence), results in male sterility although the pollen may be fully functional. MYB26 regulates the formation of secondary thickening in the anther endothecium, which is critical for anther dehiscence and fertility. Here we show that the although the MYB26 transcript shows expression in multiple floral organs the MYB26 protein is localised specifically to the anther endothecium nuclei and that it directly regulates two NAC domain genes, NST1 and NST2, which are critical for the induction of secondary thickening biosynthesis genes...
July 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28724183/physiological-intra-cytoplasmic-sperm-injection-picsi-outcomes-after-oral-pretreatment-and-semen-incubation-with-myo-inositol-in-oligoasthenoteratozoospermic-men-results-from-a-prospective-randomized-controlled-trial
#17
T Korosi, C Barta, K Rokob, T Torok
OBJECTIVE: The aim of the current study was to evaluate the effect of an oral pretreatment with a mix of myo-inositol (Myo-Ins), folic acid, vitamin E, L-carnitine, L-arginine and selenium (Folandrol, Exeltis, Hungary) and subsequent direct Myo-Ins incubation of spermatozoa before Physiological Intra-Cytoplasmic Sperm Injection (PICSI) procedures in infertile couples due to oligoasthenoteratozoospermia with previous failed PICSI procedures. PATIENTS AND METHODS: We performed a prospective, randomized controlled trial at the Assisted Reproduction Unit of the Kaáli Institute (Győr, Hungary)...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28724176/myo-inositol-as-a-male-fertility-molecule-speed-them-up
#18
R A Condorelli, S La Vignera, L M Mongioì, S G Vitale, A S Laganà, L Cimino, A E Calogero
Myo-inositol (MYO) usually represents a therapeutic option for female infertility associated with insulin resistance. Recently, several evidences are accumulating about the potential use of MYO for the treatment of male infertility. This article summarizes the rationale for MYO in the treatment of male infertility. In particular, it illustrates the potential antioxidant and prokinetic role of MYO, and its importance for the modulation of hormonal regulation. In the final part of the manuscript has been added a proposal for a clinical algorithm reserved for patients with asthenozoospermia, where probably MYO could exert specific pharmacological effects...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28723470/sexually-transmitted-disease-and-male-infertility-a-systematic-review
#19
REVIEW
Mikkel Fode, Ferdinando Fusco, Larry Lipshultz, Wolfgang Weidner
CONTEXT: Theoretically, sexually transmitted diseases (STDs) have the potential to disrupt male fertility; however, the topic remains controversial. OBJECTIVE: To describe the possible association between STDs and male infertility and to explore possible pathophysiologic mechanisms. EVIDENCE ACQUISITION: We performed a systematic literature review in accordance with the PRISMA guidelines. PubMed, Embase, and the Cochrane Library were searched for articles published before January 1, 2016, using the MeSH terms for a variety of STDs and infertility...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28722759/lifetime-reproductive-success-selection-on-lifespan-and-multiple-sexual-ornaments-in-male-european-barn-swallows
#20
Alessandra Costanzo, Roberto Ambrosini, Manuela Caprioli, Emanuele Gatti, Marco Parolini, Luca Canova, Diego Rubolini, Andrea Romano, Luca Gianfranceschi, Nicola Saino
Natural and sexual selection arise when individual fitness varies according to focal traits. Extra-pair paternities (EPPs) can affect the intensity of selection by influencing variance in fitness among individuals. Studies of selection require that individual fitness is estimated using proxies of lifetime reproductive success (LRS). However, estimating LRS is difficult in large, open populations where EPPs cause reallocation of biological paternity. Here we used extensive field sampling to estimate LRS in a population of barn swallows (Hirundo rustica) to estimate selection on lifespan and ornamental traits of males...
July 19, 2017: Evolution; International Journal of Organic Evolution
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