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https://www.readbyqxmd.com/read/28535578/coasting-withholding-gonadotrophins-for-preventing-ovarian-hyperstimulation-syndrome
#1
REVIEW
Arianna D'Angelo, Nazar N Amso, Rudaina Hassan
BACKGROUND: Ovarian hyperstimulation syndrome (OHSS) is an iatrogenic and potentially life threatening condition resulting from excessive ovarian stimulation. Reported incidence of moderate to severe OHSS ranges from 0.6% to 5% of in vitro fertilization (IVF) cycles. The factors contributing to OHSS have not been completely explained. The release of vasoactive substances secreted by the ovaries under human chorionic gonadotrophin (hCG) stimulation may play a key role in triggering this syndrome...
May 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28535490/moderate-ocean-warming-mitigates-but-more-extreme-warming-exacerbates-the-impacts-of-zinc-from-engineered-nanoparticles-on%C3%A2-a%C3%A2-marine-larva
#2
Benjamin Mos, Katrina L Kaposi, Andrew L Rose, Brendan Kelaher, Symon A Dworjanyn
There is growing concern about the combined effects of multiple human-induced stressors on biodiversity. In particular, there are substantial knowledge gaps about the combined effects of existing stressors (e.g. pollution) and predicted environmental stress from climate change (e.g. ocean warming). We investigated the impacts of ocean warming and engineered nanoparticles (nano-zinc oxide, nZnO) on larvae of a cosmopolitan tropical sea urchin, Tripneustes gratilla. Larval T. gratilla were exposed to all combinations of three temperatures, 25, 27 and 29 °C (current SST and near-future predicted warming of +2 and + 4 °C) and six concentrations of nZnO (0, 0...
May 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28535485/quantification-of-residual-antibiotics-in-cow-manure-being-spread-over-agricultural-land-and-assessment-of-their-behavioral-effects-on-antibiotic-resistant-bacteria
#3
Ji-Ran Yeom, Soon-Uk Yoon, Chang-Gyun Kim
Antibiotic resistant bacteria (ARB) in livestock manure used as fertilizer and spread over agriculture land, may pose a threat to the health of humans. Considering this, the concentrations of tetracycline (TC), oxytetracycline (OTC), and sulfathiazole (STZ) in the surface soil were quantified using LC-MS. These antibiotics have been used in livestock and are found in fertilizer produced from livestock excretions. Species of ABR were identified using 16S rDNA. Soil samples were collected at depths of 0, 7, and 15 cm from farmland in Incheon (South Korea)...
May 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28535484/biomonitoring-of-genotoxicity-of-industrial-fertilizer-pollutants-in-aiolopus-thalassinus-orthoptera-acrididae-using-alkaline-comet-assay
#4
Eman A Abdelfattah, Maria Augustyniak, Hesham A Yousef
Phosphate fertilizer industry is considered as one of the main sources of environmental pollutants. Besides solid waste products, e.g. phosphates, sulphates, and heavy metals, also atmospheric pollutants, such as hydrofluoric acid fumes (HF), sulphur dioxide (SO2), nitrogen oxides (NO2), and particulate matter with diameter up to 10 μm (PM10) can be dangerous. Genotoxic effect of these pollutants was monitored by assessing the DNA damage using alkaline comet assay on cells from brain, thoracic muscles and gut of Aiolopus thalassinus collected at three sites (A-C) located at 1, 3, and 6 km away from Abu-Zaabal Company for Fertilizers and Chemical Industries...
May 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28535436/microcystin-lr-induces-changes-in-the-gaba-neurotransmitter-system-of-zebrafish
#5
Wei Yan, Li Li, Guangyu Li, Sujuan Zhao
It has been reported that exposure to microcystins altered adult zebrafish swimming performance parameters, but the possible mechanisms of action remain unknown. Neuronal activity depends on the balance between the number of excitatory and inhibitory processes which are associated with neurotransmitters. In the present study, zebrafish embryos (5 d post-fertilization) were exposed to 0, 0.3, 3 and 30μg/L (microcystin-LR) MCLR for 90day until reaching sexual maturity. To investigate the effects of MCLR on the neurotransmitter system, mRNA levels involved in amino acid g-aminobutyric acid (GABA) and glutamate metabolic pathways were tested using quantitative real-time PCR...
May 15, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28535375/morc-1-integrates-nuclear-rnai-and-transgenerational-chromatin-architecture-to-promote-germline-immortality
#6
Natasha E Weiser, Danny X Yang, Suhua Feng, Natallia Kalinava, Kristen C Brown, Jayshree Khanikar, Mallory A Freeberg, Martha J Snyder, Györgyi Csankovszki, Raymond C Chan, Sam G Gu, Taiowa A Montgomery, Steven E Jacobsen, John K Kim
Germline-expressed endogenous small interfering RNAs (endo-siRNAs) transmit multigenerational epigenetic information to ensure fertility in subsequent generations. In Caenorhabditis elegans, nuclear RNAi ensures robust inheritance of endo-siRNAs and deposition of repressive H3K9me3 marks at target loci. How target silencing is maintained in subsequent generations is poorly understood. We discovered that morc-1 is essential for transgenerational fertility and acts as an effector of endo-siRNAs. Unexpectedly, morc-1 is dispensable for siRNA inheritance but is required for target silencing and maintenance of siRNA-dependent chromatin organization...
May 22, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28535311/quantification-of-estradiol-uptake-in-zebrafish-embryos-and-larvae
#7
J Paige Souder, Daniel A Gorelick
Zebrafish are a powerful model system to assess the molecular and cellular effects of exposure to toxic chemicals during embryonic development. To study the effects of environmental endocrine disruptors, embryos and larvae are commonly exposed to supraphysiologic concentrations of these compounds in the water, but their bioavailability in zebrafish is largely unknown. One hypothesis is that supraphysiologic concentrations of estrogens in the water are required to achieve physiologic levels in vivo, however this has not been directly tested...
May 23, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28535305/preservation-of-domesticated-honey-bee-hymenoptera-apidae-drone-semen
#8
M Paillard, A Rousseau, P Giovenazzo, J L Bailey
Preservation of honey bee (Apis mellifera L., Hymenoptera: Apidae) sperm, coupled with instrumental insemination, is an effective strategy to protect the species and their genetic diversity. Our overall objective is to develop a method of drone semen preservation; therefore, two experiments were conducted. Hypothesis 1 was that cryopreservation (-196 °C) of drone semen is more effective for long-term storage than at 16 °C. Our results show that after 1 yr of storage, frozen sperm viability was higher than at 16 °C, showing that cryopreservation is necessary to conserve semen...
May 23, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28534597/metabolomics-for-improving-pregnancy-outcomes-in-women-undergoing-assisted-reproductive-technologies
#9
REVIEW
Charalampos S Siristatidis, Eleni Sertedaki, Dennis Vaidakis
BACKGROUND: In order to overcome the low effectiveness of assisted reproductive technologies (ART) and the high incidence of multiple births, metabolomics is proposed as a non-invasive method to assess oocyte quality, embryo viability, and endometrial receptivity, and facilitate a targeted subfertility treatment. OBJECTIVES: To evaluate the effectiveness and safety of metabolomic assessment of oocyte quality, embryo viability, and endometrial receptivity for improving live birth or ongoing pregnancy rates in women undergoing ART, compared to conventional methods of assessment...
May 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28534271/optic-disc-granuloma-with-epididymitis-a-diagnostic-challenge
#10
Parthopratim Dutta Majumder, Sowkath Ali, Jyotirmay Biswas
BACKGROUND: Sarcoidosis and tuberculosis (TB) share epidemiological, immunological, and molecular features common to both, and often, it becomes difficult to differentiate them especially in a highly TB-endemic country like India. We report a case of optic disc granuloma along with epididymitis and infertility in a male who showed a response to treatment with anti-tuberculosis therapy and steroids. RESULTS: A 35-year-old Indian male who presented with complaints of blurring vision in the right eye for 6 months and treated elsewhere with two intravitreal injections of anti-VEGF was found to have optic disc granuloma in the right eye...
December 2017: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/28534180/the-c-terminal-kinesin-motor-kifc1-may-participate-in-nuclear-reshaping-and-flagellum-formation-during-spermiogenesis-of-larimichthys-crocea
#11
Dan-Dan Zhang, Xin-Ming Gao, Yong-Qiang Zhao, Cong-Cong Hou, Jun-Quan Zhu
Spermatogenesis is a highly ordered process in the differentiation of male germ cells. Nuclear morphogenesis is one of the most fundamental cellular transformations to take place during spermatogenesis. These striking transformations from spermatogonia to spermatozoa are a result of phase-specific adaption of the cytoskeleton and its association with molecular motor proteins. KIFC1 is a C-terminal kinesin motor protein that plays an essential role in acrosome formation and nuclear reshaping during spermiogenesis in mammals...
May 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28534057/the-effect-of-thawing-protocols-on-follicle-conservation-in-human-ovarian-tissue-cryopreservation
#12
T Morewood, N Getreu, B Fuller, J Morris, P Hardiman
BACKGROUND: Ovarian tissue cryopreservation has the potential to improve fertility preservation for a growing number of patients undergoing sterilising therapy, particularly where oocyte or embryo cryopreservation is not suitable. However, its success is limited by significant follicular apoptosis upon thawing, and there is wide variation in thawing protocols used with little evidence of efficacy. OBJECTIVE: To determine the best warming rates to maintain tissue viability...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28534054/the-presence-of-zinc-in-the-mouse-ovary-vitrification-medium-histological-evaluation-and-follicle-growth
#13
S Geravandi, M Azadbakht
BACKGROUND: Cryopreservation of ovary is a relevant option for preserving fertility of cancer patients undergoing chemotherapy. OBJECTIVE: To evaluate the effect of zinc in the vitrification medium on histology and follicle growth. MATERIALS AND METHODS: Mouse ovaries were vitrified in vitrification medium supplemented with 0, 100, 150 or 200 μg/dl zinc, identified as V0, V1, V2 and V3 groups, respectively. Histological evaluation of ovaries was carried out...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28534052/tea-polyphenol-t-arjuna-bark-as-sperm-antioxidant-extender-in-infertile-smokers
#14
R Parameswari, K A Rao, P Manigandan, A S Vickram, A Archana, T B Sridharan
BACKGROUND: Antioxidants protect spermatozoa against lipid peroxidation during freezing. OBJECTIVE: The study is designed to elucidate the suitable extender to preserve infertile semen of smokers against ROS damage using natural Tea polyphenol (T. arjuna bark extract). MATERIALS AND METHODS: Forty-two infertile subjects with smoking habit and 28 fertile subjects without smoking habit were considered for the study. Four semen extenders including our naturally derived antioxidant component were prepared and used to preserve semen sample from the study subjects for a period of one month...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28534017/delayed-postpartum-hemoperitoneum-due-to-uterine-artery-pseudoaneurysm-rupture
#15
Kyu-Sang Kyeong, Ji-Yeon Moon, Song-Hwa Chae, Seung Hwa Hong, Minho Kang, Eun-Hwan Jeong
A 30-year-old woman experienced severe abdominal pain 8 days after vaginal delivery. The patient was diagnosed with hemoperitoneum due to rupture of the left uterine artery pseudoaneurysm, which was confirmed via ultrasound with color Doppler and computed tomography scans. This patient was treated with bilateral uterine artery embolization to maintain fertility. A uterine artery pseudoaneurysm that causes delayed postpartum hemorrhage can occur after cesarean section or vaginal delivery. A uterine artery pseudoaneurysm can be fatal, so its detection and diagnosis are critical...
May 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28534015/oncologic-and-obstetric-outcomes-of-conservative-surgery-for-borderline-ovarian-tumors-in-women-of-reproductive-age
#16
Se Yun Lee, Min Chul Choi, Bo Ram Kwon, Sang Geun Jung, Hyun Park, Won Duk Joo, Chan Lee, Je Ho Lee, Joon Mo Lee
OBJECTIVE: To compare the oncologic and obstetric outcomes in reproductive-age females with borderline ovarian tumors (BOTs) treated with cyst enucleation (CE) or unilateral salpingo-oophorectomy (USO). METHODS: The medical records of patients with BOTs treated between 1998 and 2014 were retrospectively reviewed. The recurrence rates in the USO and CE groups were compared, and the postoperative obstetric outcomes were assessed via telephone survey. RESULTS: Eighty-nine patients with BOTs underwent USO, and 19 underwent CE...
May 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28533980/mitochondrial-complex-i-deficiency-leads-to-the-retardation-of-early-embryonic-development-in-ndufs4-knockout-mice
#17
Mei Wang, Ya-Ping Huang, Han Wu, Ke Song, Cong Wan, A-Ni Chi, Ya-Mei Xiao, Xiao-Yang Zhao
BACKGROUND: The NDUFS4 gene encodes an 18-kD subunit of mitochondria complex I, and mutations in this gene lead to the development of a severe neurodegenerative disease called Leigh syndrome (LS) in humans. To investigate the disease phenotypes and molecular mechanisms of Leigh syndrome, the Ndufs4 knockout (KO) mouse has been widely used as a novel animal model. Because the homozygotes cannot survive beyond child-bearing age, whether Ndufs4 and mitochondrial complex I influence early embryonic development remains unknown...
2017: PeerJ
https://www.readbyqxmd.com/read/28533904/-this-is-where-it-all-started-the-pivotal-role-of-plc%C3%AE-within-the-sophisticated-process-of-mammalian-reproduction-a-systemic-review
#18
Itai Gat, Raoul Orvieto
Mammalian reproduction is one of the most complex and fascinating biological phenomenon, which aims to transfer maternal and paternal genetic material to the next generation. At the end of oogenesis and spermatogenesis, both haploid gametes contain a single set of chromosomes ready to form the zygote, the first cell of the newly developing individual. The mature oocyte and spermatozoa remain in a quiescent state, during which the oocyte is characterized by nuclear and cytoplasmic arrest, while the spermatozoa necessitates further maturation within the epididymis and female reproductive track prior to egg fertilization...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28533895/effects-of-nitrogen-and-tiller-type-on-grain-yield-and-physiological-responses-in-rice
#19
Yang Wang, Jianwei Lu, Tao Ren, Saddam Hussain, Chen Guo, Sen Wang, Rihuan Cong, Xiaokun Li
The increasing food demands from an expanding population necessitate global efforts to increase crop production and ensure food security. The rate of nitrogen (N) fertilizer application is strongly related to crop yield. However, although the application of N fertilizer significantly increases the number of tillers in rice, late emerging tillers usually produce lower yields compared with early emerging tillers. Understanding the physiological constraints of late emerging rice tillers is critical for further increasing rice grain yields...
March 2017: AoB Plants
https://www.readbyqxmd.com/read/28533814/teenage-mothers-today-what-we-know-and-how-it-matters
#20
Stefanie Mollborn
Over the past two decades, births to U.S. teenagers have fallen and no longer follow overall fertility patterns. Yet the unique challenges faced by teenage mothers and their families justify continued research. Across disciplines, newer work has furthered our understanding of teenage motherhood today. In this article, I highlight four areas of progress: processes of selection into teenage motherhood, the broader consequences of teenage childbearing beyond the socioeconomic realm, heterogeneity of effects, and the application of life course principles...
March 2017: Child Development Perspectives
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