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https://www.readbyqxmd.com/read/29113725/hormonal-induction-of-ovulation-using-ovaprim%C3%A2-d-arg-6-pro-9-net-sgnrh-domperidone-and-its-impact-on-embryonic-development-of-wild-caught-longspine-scraper-capoeta-trutta-heckel-1843
#1
Vahid Zadmajid, Rahman Mirzaee, Hamid Hoseinpour, Nazir Vahedi, Ian Anthony Ernest Butts
Knowledge of gamete quality is a prerequisite for developing techniques to fertilize eggs and rear offspring for hatchery production. Our objective was to develop assisted reproductive techniques, via hormonal induction of final oocyte maturation (FOM), for Longspine scraper, Capoeta trutta. Fish were administered injections of salmon gonadotropin-releasing hormone analogue containing anti-dopaminergic drug (Ovaprim™) or saline (control). Effects of Ovaprim on induction of ovulation, gamete quality, embryonic development, and larval survival were later examined with serum steroid hormone levels and ovarian histology...
October 23, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29111977/nanos-promotes-epigenetic-reprograming-of-the-germline-by-down-regulation-of-the-thap-transcription-factor-lin-15b
#2
Chih-Yung Sean Lee, Tu Lu, Geraldine Seydoux
Nanos RNA-binding proteins are required for germline development in metazoans, but the underlying mechanisms remain poorly understood. We have profiled the transcriptome of primordial germ cells (PGCs) lacking the nanos homologs nos-1 and nos-2 in C. elegans. nos-1nos-2 PGCs fail to silence hundreds of transcripts normally expressed in oocytes. We find that this misregulation is due to both delayed turnover of maternal transcripts and inappropriate transcriptional activation. The latter appears to be an indirect consequence of delayed turnover of the maternally-inherited transcription factor LIN-15B, a synMuvB class transcription factor known to antagonize PRC2 activity...
November 7, 2017: ELife
https://www.readbyqxmd.com/read/29090429/evolvement-of-transgenic-male-sterility-and-fertility-restoration-system-in-rice-for-production-of-hybrid-varieties
#3
Gundra Sivakrishna Rao, Priyanka Deveshwar, Malini Sharma, Sanjay Kapoor, Khareedu Venkateswara Rao
We have developed a unique male-sterility and fertility-restoration system in rice by combining Brassica napus cysteine-protease gene (BnCysP1) with anther-specific P12 promoter of rice for facilitating production of hybrid varieties. In diverse crop plants, male-sterility has been exploited as a useful approach for production of hybrid varieties to harness the benefits of hybrid vigour. The promoter region of Os12bglu38 gene of rice has been isolated from the developing panicles and was designated as P12. The promoter was fused with gusA reporter gene and was expressed in Arabidopsis and rice systems...
October 31, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29073790/efficacy-of-dehydroepiandrosterone-dhea-supplementation-for-in-vitro-fertilization-and-embryo-transfer-cycles-a-systematic-review-and-meta-analysis
#4
Yaofang Liu, Lina Hu, Lingye Fan, Fang Wang
Dehydroepiandrosterone (DHEA) supplementation might hold some promise in vitro fertilization and embryo transfer cycles. However, the results remain controversial. We conducted a systematic review and meta-analysis to evaluate the efficacy of DHEA in patients for in vitro fertilization. PubMed, EMbase, Web of science, EBSCO and Cochrane library databases were systematically searched. Randomized controlled trials (RCTs) assessing the effect of DHEA versus placebo on in vitro fertilization were included. Two investigators independently searched articles, extracted data and assessed the quality of included studies...
October 26, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29069407/reimagining-infertility-a-critical-examination-of-fertility-norms-geopolitics-and-survey-bias
#5
Jasmine Fledderjohann, Liberty Walther Barnes
While it is estimated that 15% of couples worldwide are infertile, this figure hinges critically on the quality, inclusiveness and availability of infertility data sources. Current infertility data and statistics fail to account for the infertility experiences of some social groups. We identify these people as the invisible infertile , and refer to their omission from infertility data and statistics-whether intentional or unintentional-as the process of invisibilization . We identify two processes through which invisibilization in survey data is produced: sampling, with focus on exclusionary definitions of the population at-risk, and survey instrument design, with focus on skip patterns and question wording...
October 24, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29066934/adolescent-girls-and-young-women-living-with-hiv-preconception-counseling-strategies
#6
Deborah L Jones, Marisa Echenique, JoNell Potter, Violeta J Rodriguez, Stephen M Weiss, Margaret A Fischl
BACKGROUND: Rates of pregnancy among women living with HIV are similar to those in the general population. Unintended pregnancies are also common, and among adolescents and young women perinatally infected (PHIV+) or behaviorally infected (BHIV+) with HIV, planning for both conception and contraception is an important element of HIV care that may be neglected. This pilot study examined the influence of intervention strategies targeting fertility planning, safer conception practices and patient-provider communication...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/29064078/defective-wnt3-expression-by-testicular-sertoli-cells-compromise-male-fertility
#7
Sayon Basu, Satya Pal Arya, Abul Usmani, Bhola Shankar Pradhan, Rajesh Kumar Sarkar, Nirmalya Ganguli, Mansi Shukla, Kamal Mandal, Surendra Singh, Kanchan Sarda, Subeer S Majumdar
Testicular Sertoli cells make a niche for the division and differentiation of germ cells. Sertoli cells respond to increased follicle-stimulating hormone (FSH) and testosterone (T) levels at the onset of puberty by producing paracrine factors which affect germ cells and trigger robust onset of spermatogenesis. Such paracrine support to germ cells is absent during infancy, despite Sertoli cells being exposed to high FSH and T within the infant testis. This situation is similar to certain cases of male idiopathic infertility where post-pubertal Sertoli cells fail to support germ cell division and differentiation in spite of endogenous or exogenous hormonal support...
October 24, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29063503/are-blastocyst-aneuploidy-rates-different-between-fertile-and-infertile-populations
#8
Jonathan D Kort, Rajiv C McCoy, Zach Demko, Ruth B Lathi
PURPOSE: This study aimed to determine if patients with infertility or recurrent pregnancy loss have higher rates of embryo aneuploidy than fertile controls. METHODS: This was a retrospective review of all pre-implantation genetic screening (PGS) cases processed by a single reference lab prior to March 2014 after a blastocyst biopsy. Cases were excluded if no indication for PGS was designated or patients were translocation carriers. The fertile control group consisted of patients undergoing IVF with PGS for sex selection only...
October 23, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29051527/micro-ribonucleic-acids-and-extracellular-vesicles-repertoire-in-the-spent-culture-media-is-altered-in-women-undergoing-in-vitro-fertilization
#9
Masood Abu-Halima, Sebastian Häusler, Christina Backes, Tobias Fehlmann, Claudia Staib, Sigrun Nestel, Irina Nazarenko, Eckart Meese, Andreas Keller
MicroRNAs (miRNAs) are class of small RNA molecules with major impact on gene regulation. We analyzed the potential of miRNAs secreted from pre-implantation embryos into the embryonic culture media as biomarkers to predict successful pregnancy. Using microarray analysis, we profiled the miRNome of the 56 spent culture media (SCM) after embryos transfer and found a total of 621 miRNAs in the SCM. On average, we detected 163 miRNAs in SCM of samples with failed pregnancies, but only 149 SCM miRNAs of embryos leading to pregnancies...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29044420/characterization-of-a-novel-role-for-the-dynamin-mechanoenzymes-in-the-regulation-of-human-sperm-acrosomal-exocytosis
#10
Wei Zhou, Amanda L Anderson, Adrian P Turner, Geoffry N De Iuliis, Adam McCluskey, Eileen A McLaughlin, Brett Nixon
STUDY QUESTION: Does dynamin regulate human sperm acrosomal exocytosis? SUMMARY ANSWER: Our studies of dynamin localization and function have implicated this family of mechanoenzymes in the regulation of progesterone-induced acrosomal exocytosis in human spermatozoa. WHAT IS KNOWN ALREADY: Completion of an acrosome reaction is a prerequisite for successful fertilization in all studied mammalian species. It follows that failure to complete this unique exocytotic event represents a common aetiology in the defective spermatozoa of male infertility patients that have failed IVF in a clinical setting...
October 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29040590/constructing-the-crystal-ball-how-to-get-reliable-prognostic-information-for-the-management-of-subfertile-couples
#11
R van Eekelen, N van Geloven, M van Wely, D J McLernon, M J Eijkemans, S Repping, E W Steyerberg, B W Mol, S Bhattacharya, F van der Veen
Couples in whom the results of an initial fertility workup fail to identify the presence of any obvious barriers to conception are diagnosed with unexplained subfertility. Couples who have tried to conceive for a relatively short time have a good chance of natural conception and thus may not benefit from immediate access to ART. As fertility decreases over time, the main dilemma that clinicians and couples face is when to abandon an expectant approach in favour of active treatment. Several prognostic or predictive models have been used to try to discriminate between couples with high and low chances of conception but have been unable to compare individualized chances of conception associated with ART relative to chances of natural conception at various time points...
November 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29038126/transcervical-inoculation-with-chlamydia-trachomatis-induces-infertility-in-hla-dr4-transgenic-and-wild-type-mice
#12
Sukumar Pal, Delia F Tifrea, Guangming Zhong, Luis M de la Maza
Chlamydia trachomatis (Ct) is the leading cause of infection-induced infertility in women. Attempts to control this epidemic with screening programs and antibiotic therapy have failed. Currently, a vaccine to prevent Ct infections is not available. In order to develop an animal model for evaluating vaccine antigens that can be applied to humans, we used Ct serovar D (strain UW-3/Cx) (Ct-D) to induce infertility in mice whose major histocompatibility complex class II antigen was replaced with the human leukocyte antigen (HLA)-DR4...
October 16, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29030908/epidemiology-of-infertility-in-china-a-population-based-study
#13
Zehong Zhou, Danni Zheng, Hongping Wu, Rong Li, Suxin Xu, Yuefan Kang, Yunxia Cao, Xiujuan Chen, Yimin Zhu, Shuguang Xu, Zi-Jiang Chen, Ben Willem Mol, Jie Qiao
OBJECTIVE: To assess the current prevalence of and risk factors for infertility among couples of reproductive age in China. DESIGN: Population-based cross-sectional study. SETTING: We approached 25,270 couples in 8 provinces/municipalities, of whom 18,571 (response rate 74%, 18,571/25,270) were interviewed. POPULATION: Couples living together and married for more than 1 year, of whom the female spouse was 20-49 years old...
October 14, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29029382/differential-impacts-of-six-insecticides-on-a-mealybug-and-its-coccinellid-predator
#14
Paulo R R Barbosa, Martin D Oliveira, Eduardo M Barros, J P Michaud, Jorge B Torres
Broad-spectrum insecticides may disrupt biological control and cause pest resurgence due to their negative impacts on natural enemies. The preservation of sustainable pest control in agroecosystems requires parallel assessments of insecticide toxicity to target pests and their key natural enemies. In the present study, the leaf dipping method was used to evaluate the relative toxicity of six insecticides to the striped mealybug, Ferrisia dasylirii (Cockerell) (Hemiptera: Pseudococcidae) and its predator, Tenuisvalvae notata (Mulsant) (Coleoptera: Coccinellidae)...
January 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29022902/differential-regulation-of-spermatogenic-process-by-lkb1-isoforms-in-mouse-testis
#15
Feifei Kong, Mei Wang, Xiaojing Huang, Qiuling Yue, Xiang Wei, Xiaowei Dou, Xiaoxu Peng, Yuanyuan Jia, Ke Zheng, Tinghe Wu, Jun Yan, Jing Li
Liver serine/threonine kinase B1 (LKB1) is a tumor suppressor associated with the pathogenesis of Peutz-Jeghers syndrome. Affected males are at increased risk of developing Sertoli cell tumors and display defective spermatogenesis. Male mice lacking the short isoform (Lkb1S) of Lkb1 were sterile and exhibited abnormal spermiogenesis. In addition to the short isoform, the long isoform of Lkb1 (Lkb1L) is also expressed in testis; however, the requirement of the long isoform for fertility and the functional difference between the isoforms remain unknown...
October 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29021901/icsi-diagnostic-a-way-to-prevent-total-fertilization-failure-after-4-unsuccessful-iui
#16
Arnaud Larbuisson, Dominique Raick, Stephanie Demelenne, Annick Delvigne
BACKGROUND: The aim of this retrospective study is to investigate the relevance of dividing oocytes and using some for traditional in vitro fertilization (IVF) and others for intracytoplasmic sperm injection (ICSI) as of the first IVF cycle in patients with unexplained infertility who have undergone 4 intrauterine insemination (IUI) cycles which produced no pregnancies. METHODS: This retrospective study includes patients with unexplained infertility who have failed to become pregnant, after 4 IUI, despite normal semen parameters after sperm capacitation...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/29020465/donor-sperm-insemination-after-failed-intra-couple-intracytoplasmic-sperm-injection
#17
Sylviane Hennebicq, Oxana Blagosklonov, Florence Eustache, Aline Papaxanthos, Veronique Drouineaud, Catherine Guillemain, Sophie Mirallie, Beatrice Delepine, Nathalie Rives, Isabelle Berthaut, Cynthia Frapsauce, Jean-François Guérin, Mehdi Benchaib
The purpose of the present multicenter study was to investigate whether an artificial insemination with donor sperm (AID) procedure after intra-couple intracytoplasmic sperm injection (ICSI) failure offers a significant chance of pregnancy and to identify prognostic factors for pregnancy after an AID procedure. An eleven-year retrospective multicenter study was conducted among 13 Centre d'Etude et de Conservation des Oeufs et du Sperme (CECOS) centers. A total of 319 couples having undergone an AID procedure after intra-conjugal ICSI failure were included in this study; a total of 1,159 AID and 1,011 intra-conjugal ICSI cycles were performed...
October 11, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29017965/a-novel-mutation-in-haus7-results-in-severe-oligozoospermia-in-two-brothers
#18
Lin Li, Yan-Wei Sha, Zhi-Ying Su, Li-Bin Mei, Zhi-Yong Ji, Qing Zhang, Shao-Bin Lin, Xu Wang, Ping-Ping Qiu, Ping Li, Chenghong Yin
Severe oligozoospermia (SO) is a common disease resulting in male infertility; however, its pathophysiology remains unclear. Here, we report two brothers with SO. Whole-exome sequencing (WES) identified a hemizygous variant in HAUS7 (c.G386T:p.G129V), an X-linked gene. HAUS7 has been reported to play a role in the meiotic maturation and chromosome alignment of germ cells. The two patients inherited this variant from their mother, and this variant was considered to be a highly pathogenic mutation by in silico analysis...
October 7, 2017: Gene
https://www.readbyqxmd.com/read/28971890/altered-mirna-profile-dependent-on-art-outcome-in-early-pregnancy-targets-wnt-pathway
#19
Alexander Freis, Andreas Keller, Nicole Ludwig, Eckart Meese, Julia Jauckus, Julia Rehnitz, Edison Capp, Thomas Strowitzki, Ariane Germeyer
Main goal of this study is to detect possible alterations in microRNA(miRNA)-expression and the pathway targeted in plasma at the time of embryo transfer and pregnancy testing dependent on the assisted reproductive treatment (ART) outcome after ovarian hyperstimulation for in vitro fertilization. Changes in miRNA-expression in plasma of women, who became pregnant (n=6) vs. women who failed implantation (n=6) following day 5 embryo transfer (ET), were investigated at day of ET and pregnancy testing (PT). Protein expression to validate the finding was performed with a sample size of n=20 (10 per group) using enzyme-linked immunosorbent assay...
September 29, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28942072/mercury-ii-impairs-nucleotide-excision-repair-ner-in-zebrafish-danio-rerio-embryos-by-targeting-primarily-at-the-stage-of-dna-incision
#20
Yung Chang, Wei-Yuan Lee, Yu-Jie Lin, Todd Hsu
Mercuric ion (Hg(2+)) is the most prevalent form of inorganic Hg found in polluted aquatic environment. As inhibition of DNA damage repair has been proposed as one of the mechanisms of Hg(2+)-induced genotoxicity in aquatic animals and mammalian cells, this study explored the susceptibility of different stages of nucleotide excision repair (NER) in zebrafish (Danio rerio) embryos to Hg(2+) using UV-damaged DNA as the repair substrate. Exposure of embryos at 1h post fertilization (hpf) to HgCl2 at 0.1-2.5μM for 9h caused a concentration-dependent inhibition of NER capacity monitored by a transcription-based DNA repair assay...
September 14, 2017: Aquatic Toxicology
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