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https://www.readbyqxmd.com/read/28109138/adaptations-in-the-microarchitecture-and-load-distribution-of-maternal-cortical-and-trabecular-bone-in-response-to-multiple-reproductive-cycles-in-rats
#1
Chantal M J de Bakker, Allison R Altman-Singles, Yihan Li, Wei-Ju Tseng, Connie Li, X Sherry Liu
Pregnancy, lactation, and weaning result in dramatic changes in maternal calcium metabolism. In particular, the increased calcium demand during lactation causes a substantial degree of maternal bone loss. This reproductive bone loss has been suggested to be largely reversible, as multiple clinical studies have found that parity and lactation history have no adverse effect on post-menopausal fracture risk. However, the precise effects of pregnancy, lactation, and post-weaning recovery on maternal bone structure are not well understood...
January 21, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28109031/undifferentiated-embryonic-cell-transcription-factor-1-utf1-and-deleted-in-azoospermia-like-dazl-expression-in-the-testes-of-donkeys
#2
Y S Lee, H J Jung, M J Yoon
Putative markers for each specific germ cell stage can be a useful tool to study the fate and functions of these cells. Undifferentiated embryonic cell transcription factor 1 (UTF1) is a putative marker for undifferentiated spermatogonia in humans, rats and horses. The deleted in azoospermia-like (DAZL) protein is also expressed by differentiated spermatogonia and primary spermatocytes in several species. However, whether the expression patterns of these molecular markers are identical and applicable to donkeys remains to be elucidated...
January 20, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28109029/reproductive-performance-of-breeder-quails-fed-diets-supplemented-with-l-cysteine-coated-iron-oxide-nanoparticles
#3
H Mohammadi, A Farzinpour, A Vaziry
The objective of this study was to investigate the effects of L-cysteine-coated iron oxide nanoparticles on reproductive performance in breeder quails. The five treatment diets consisted of (i) negative control diet not supplemented with iron, (ii) positive control diet supplemented with 60 mg/kg of Fe3 O4 and (iii) experimental diets supplemented with 0.6, 6 and 60 mg/kg of L-cysteine-coated iron oxide nanoparticles. A total of 100 seven-day-old quail chicks were weighed and randomly placed to five groups of five replicate cages...
January 20, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28109018/gonad-histology-and-serum-11-kt-profile-during-the-annual-reproductive-cycle-in-sterlet-sturgeon-adult-males-acipenser-ruthenus
#4
A Golpour, C Broquard, S Milla, H Dadras, A R Baloch, T Saito, M Pšenička
The aim of this study was to assess monthly testicular development in the cultured breeding stock of sterlet, Acipenser ruthenus, using histological and serum sex steroid changes. Testicular development in the adult male was examined monthly and showed four distinct phases including resting, pre-spawning, spawning and post-spawning. Also, seasonal changes of the testes were described according to its variations in gonadosomatic index (GSI) during different phases of testicular development. Using histology, we identified continuous spermatogenesis and asynchronous gonad development pattern in the testes of male sterlet, which shows that regulation of annual gonadal cycle is influenced by season...
January 21, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28109010/lack-of-effects-of-an-equine-chorionic-gonadotropin-ecg-administration-between-days-9-and-15-postpartum-on-reproductive-performance-in-a-holstein-dairy-herd
#5
M Freick, O Passarge, J Weber
Recently, it has been demonstrated that administration of equine chorionic gonadotropin (eCG) in the postpartum period in dairy cows can enhance follicle growth, reduce the interval from calving to first ovulation and increase plasma estradiol concentrations, and, thus, could enhance reproductive performance in a dairy herd when administered on day 6 postpartum. The aim of this study was to investigate the effects of a single dose of eCG between days 9 and 15 postpartum on parameters of reproductive performance in dairy cows...
January 21, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28108993/experience-from-a-multi-country-initiative-to-improve-the-monitoring-of-selected-reproductive-health-indicators-in-africa
#6
Maria Barreix, Özge Tunçalp, Namuunda Mutombo, Ayotunde A Adegboyega, Lale Say
Universal access to sexual and reproductive health remains part of the unfinished business of global development in the Africa. To achieve it, health interventions should be monitored using programmatic indicators. WHO's Strengthening Measurement of Reproductive Health Indicators in Africa initiative, implemented in Ghana, Nigeria, Kenya, Uganda, and Zimbabwe, aimed to improve national information systems for routine monitoring of reproductive health indicators. Participating countries developed action plans employing a two-pronged strategy: (1) revising, standardizing, and harmonizing existing information-system reproductive health indicators; and (2) building data-collection capacity through training and supervision at select pilot sites...
January 21, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28108874/surviving-in-isolation-genetic-variation-bottlenecks-and-reproductive-strategies-in-the-canarian-endemic-limonium-macrophyllum-plumbaginaceae
#7
Ares Jiménez, Barbara Weigelt, Arnoldo Santos-Guerra, Juli Caujapé-Castells, José María Fernández-Palacios, Elena Conti
Oceanic archipelagos are typically rich in endemic taxa, because they offer ideal conditions for diversification and speciation in isolation. One of the most remarkable evolutionary radiations on the Canary Islands comprises the 16 species included in Limonium subsection Nobiles, all of which are subject to diverse threats, and legally protected. Since many of them are single-island endemics limited to one or a few populations, there exists a risk that a loss of genetic variation might limit their long-term survival...
January 20, 2017: Genetica
https://www.readbyqxmd.com/read/28108866/donor-conception-and-passing-or-why-australian-parents-of-donor-conceived-children-want-donors-who-look-like-them
#8
Karen-Anne Wong
This article explores the processes through which Australian recipients select unknown donors for use in assisted reproductive technologies and speculates on how those processes may affect the future life of the donor-conceived person. I will suggest that trust is an integral part of the exchange between donors, recipients, and gamete agencies in donor conception and heavily informs concepts of relatedness, race, ethnicity, kinship, class, and visibility. The decision to be transparent (or not) about a child's genetic parentage affects recipient parents' choices of donor, about who is allowed to "know" children's genetic backgrounds, and how important it is to be able to "pass" as an unassisted conception...
January 20, 2017: Journal of Bioethical Inquiry
https://www.readbyqxmd.com/read/28108841/increased-incidence-of-post-term-delivery-and-cesarean-section-after-frozen-thawed-embryo-transfer-during-a-hormone-replacement-cycle
#9
Kazuki Saito, Kenji Miyado, Kenji Yamatoya, Akira Kuwahara, Eisuke Inoue, Mami Miyado, Maki Fukami, Tomonori Ishikawa, Takakazu Saito, Toshiro Kubota, Hidekazu Saito
PURPOSE: This study aimed to clarify the risks of adverse pregnancy outcomes in patients who conceive singletons after frozen embryo transfer (FET) during a hormone replacement cycle and their offspring. METHODS: A retrospective cohort study was conducted in patients who conceived after FET, based on the Japanese-assisted reproductive technology registry for 2013. The perinatal outcomes in cases with live-born singletons achieved through natural ovulatory cycle FET (NC-FET) (n = 6287) or hormone replacement cycle FET (HRC-FET) (n = 10,235) were compared...
January 20, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28108812/fackel-interacts-with-gibberellic-acid-signaling-and-vernalization-to-mediate-flowering-in-arabidopsis
#10
Bingyao Huang, Pingping Qian, Na Gao, Jie Shen, Suiwen Hou
Fackel (FK) is involved in the flowering of Arabidopsis mainly via the gibberellin pathway and vernalization pathway. This new function of FK is partially dependent on the FLOWERING LOCUS C ( FLC ). A common transitional process from vegetative stage to reproductive stage exists in higher plants during their life cycle. The initiation of flower bud differentiation, which plays a key role in the reproductive phase, is affected by both external environmental and internal regulatory factors. In this study, we showed that the Arabidopsis weak mutant allele fk-J3158, impaired in the FACKEL (FK) gene, which encodes a C-14 reductase involved in sterol biosynthesis, had a long life cycle and delayed flowering time in different photoperiods...
January 20, 2017: Planta
https://www.readbyqxmd.com/read/28108444/cancer-risk-in-women-treated-with-fertility-drugs-according-to-parity-status-a-registry-based-cohort-study
#11
Marte M Reigstad, Ritsa Storeng, Tor A Myklebust, Nan B Oldereid, Anne K Omland, Trude E Robsahm, Louise A Brinton, Siri Vangen, Kari Furu, Inger K Larsen
Background Long-term safety of assisted reproductive techniques (ART) is of interest as use is increasing. Cancer risk is known to be affected by parity. This study examined risk of cancer after fertility treatment, stratified by women's parity. Methods Data was obtained on all women (n=1 353 724) born in Norway between 1960-1996. Drug exposure data (2004-2014) was obtained from the Norwegian Prescription Database [drugs used in ART and clomiphene citrate (CC)]. The Medical Birth Registry of Norway provided parity status...
January 20, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28108418/intragenus-campylomormyrus-and-intergenus-hybrids-in-mormyrid-fish-physiological-and-histological-investigations-of-the-electric-organ-ontogeny
#12
Frank Kirschbaum, Linh Nguyen, Stephanie Baumgartner, Linda Chi, Rene Wolfart, Khouloud Elarbani, Hari Eppenstein, Yevheniia Korniienko, Lilian Guido-Böhm, Victor Mamonekene, Marianne Vater, Ralph Tiedemann
African weakly electric mormyrid fish show a high diversity of their electric organ discharge (EOD) both across and within genera. Thanks to a recently developed technique of artificial reproduction in mormyrid fish, we were able to perform hybridizations between different genera and within one genus (Campylomormyrus). The hybrids of intergenus hybridizations exhibited different degrees of reduced survival related to the phylogenetic distance of the parent species: hybrids of the crosses between C. rhynchophorus and its sister genus Gnathonemus survived and developed normally...
January 17, 2017: Journal of Physiology, Paris
https://www.readbyqxmd.com/read/28108293/a-model-incorporating-combined-rtis-and-pis-therapy-during-early-hiv-1-infection
#13
Sutimin, F Chirove, E Soewono, N Nuraini, L B Suromo
We develop a within host mathematical model of HIV-1 infection describing the effects of combined RTIs and PIs treatments on early HIV-1 infection when treatment is captured using periodic functions of pharmacokinetics type. We use an alternative of the basic reproduction number to analyze endemicity level of HIV-1 infection. Various treatment scenarios incorporating perfect and imperfect drug adherence in drug administration are explored. Our results show that pharmacokinetics treatment is a more realistic way of administering the treatment...
January 17, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28108161/behavioral-response-and-gene-expression-changes-in-fipronil-administered-male-japanese-quail-coturnix-japonica
#14
Samah R Khalil, Ashraf Awad, Hesham H Mohammed
Fipronil is an important member of the phenylpyrazole group of insecticides and is widely used for various crops and vegetables to control insects, thereby exposing birds, animals, and humans to fipronil. Currently, there is limited information on the effects of fipronil exposure in Japanese quail. Therefore, our aim was to assess the reproductive toxicological effects of fipronil in the Japanese quail in a 15-day gavage study and then its recovery over a period of 60 days. Fipronil-administration led to significant losses in both feed intake and body weight...
January 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28108093/source-apportionment-of-lead-in-the-blood-of-women-of-reproductive-age-living-near-tailings-in-taxco-guerrero-mexico-an-isotopic-study
#15
Analine Berenice Vázquez Bahéna, Oscar Talavera Mendoza, Ma Elena Moreno Godínez, Sergio Adrián Salgado Souto, Joaquín Ruiz, Gerardo Huerta Beristain
The concentration and isotopic composition of lead in the blood of forty seven women of reproductive age (15-45y) exposed to multiple sources in two rural communities of the mining region of Taxco, Guerrero in southern Mexico were determined in order to identify specific contributing sources and their apportionment and to trace probable ingestion pathways. Our data indicate that >36% of the studied women have blood lead concentrations above 10μgdL(-1) and up to 87% above 5μgdL(-1). Tailings contain between 2128 and 5988mgkg(-1) of lead and represent the most conspicuous source in the area...
January 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28108049/expression-and-localization-of-guanine-nucleotide-binding-protein-alpha-s-in-the-testis-and-epididymis-of-rams-at-different-developmental-stages
#16
Zhen Li, Jieli Lu, Jia Chen, Quanhai Pang, Ruipeng Nan, Zhiwei Zhu
The guanine nucleotide-binding alpha S subunit (Gαs) is an important element of key signaling pathways, which is widely expressed in mammalian tissues; however, its role in the reproductive system is still unclear. In this study, we investigated the expression and localization of Gαs in the testes and epididymis of rams at different developmental stages using quantitative RT-PCR, immunohistochemistry, and western blotting. In 1-, 6-, and 12-month-old rams, the transcription of Gαs-encoding gene (Gnαs) was significantly upregulated in the corpus and cauda epididymis compared to the testes and caput epididymis (P<0...
January 15, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28108032/disruption-of-the-sheep-bmpr-ib-gene-by-crispr-cas9-in-in%C3%A2-vitro-produced-embryos
#17
Xuemei Zhang, Wenrong Li, Yangsheng Wu, Xinrong Peng, Bian Lou, Liqin Wang, Mingjun Liu
BMPR-IB (also known as FecB) is a key candidate gene for the genetic control of sheep reproductive performance. Loss-of-function mutations in the sheep BMPR-IB gene lead to an increase in ovulation rate and consequently larger litter size. However, the BMPR-IB gene has been identified in only a few sheep breeds. To improve sheep reproduction through modification of the BMPR-IB gene, we designed an sgRNA to target the sheep BMPR-IB gene by using the CRISPR/Cas9 system. First, we performed gene editing by injecting Cas9/sgRNA into the cytoplasm of one-cell fertilized eggs...
November 9, 2016: Theriogenology
https://www.readbyqxmd.com/read/28107880/treatment-strategies-for-sheep-scab-an-economic-model-of-farmer-behaviour
#18
Emily J Nixon, Hannah Rose Vineer, Richard Wall
Ovine psoroptic mange (sheep scab) is a debilitating and damaging condition caused by a hypersensitivity reaction to the faecal material of the parasitic mite Psoroptes ovis. Farmers incur costs from the use of prophylactic acaricides and, if their sheep become infected, they incur the costs of therapeutic treatment plus the economic loss from reduced stock growth, lower reproductive rate, wool loss and hide damage. The unwillingness of farmers to use routine prophylactic treatment has been cited as a primary cause of the growing incidence of sheep scab in the United Kingdom (UK) since the disease was deregulated in 1992...
February 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28107778/parabolic-variation-in-sexual-selection-intensity-across-the-range-of-a%C3%A2-cold-water-pipefish-implications-for-susceptibility-to-climate-change
#19
Nuno Monteiro, Mário Cunha, Lídia Ferreira, Natividade Vieira, Agostinho Antunes, David Lyons, Adam G Jones
While an understanding of evolutionary processes in shifting environments is vital in the context of rapid ecological change, one of the most potent selective forces, sexual selection, remains curiously unexplored. Variation in sexual selection across a species range, especially across a gradient of temperature regimes, has the potential to provide a window into the possible impacts of climate change on the evolution of mating patterns. Here, we investigated some of the links between temperature and indicators of sexual selection, using a cold-water pipefish as model...
January 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28107718/test-procedures-for-measuring-the-sub-chronic-effects-of-chemicals-on-the-freshwater-cyclopoid-eucyclops-serrulatus
#20
Marco Cifoni, Diana Maria Paola Galassi, Cecilia Faraloni, Tiziana Di Lorenzo
The purpose of this study has been to describe test procedures for measuring the (sub)chronic effects of chemicals on the freshwater cyclopoid Eucyclops serrulatus. To this end we have adapted the setting of the standard full life-cycle protocol of the marine harpacticoid A. tenuiremis to E. serrulatus. We have tested the effects of 4 different diets, two temperatures and two rearing volumes on the survival, development, reproduction and population growth rates of this species. Our results have highlighted that full life-cycle tests can be run using 2 mL-glass vials, a diet consisting of a mixture of living cells of Chlorella sorokiniana and Scenedesmus quadricauda, at either 25 °C (test duration: 42 days) or 18 °C (test duration: 51 days)...
January 3, 2017: Chemosphere
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