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https://www.readbyqxmd.com/read/28815550/fertility-preservation-in-women-with-borderline-ovarian-tumors-how-does-it-impact-disease-outcome-a-cohort-study
#1
Limor Helpman, Assaf Yaniv, Mario E Beiner, Sarit Aviel-Ronen, Tamar Perri, Gilad Ben-Baruch, Liat Hogen Ben-David, Ariella Jakobson-Setton, Jacob Korach
INTRODUCTION: Borderline ovarian tumors are typically indolent neoplasms. Since many are diagnosed in younger women, fertility conservation is an important consideration and has been advocated based on retrospective data. The objective of this study was to identify features impacting on recurrence and survival in a series of borderline ovarian tumors, and to assess the safety of a fertility-sparing approach. MATERIAL AND METHODS: A historical cohort study of consecutive borderline ovarian tumors cases treated at a single institution over 30 years (1981-2011)...
August 16, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28814333/rapamycin-prevents-cyclophosphamide-induced-over-activation-of-primordial-follicle-pool-through-pi3k-akt-mtor-signaling-pathway-in-vivo
#2
Linyan Zhou, Yanqiu Xie, Song Li, Yihua Liang, Qi Qiu, Haiyan Lin, Qingxue Zhang
BACKGROUND: Primordial follicular depletion has thought to be a common adverse effect of chemotherapy especially for female of reproductive age. The study aimed to evaluate the protective effect of rapamycin on the primordial follicles and its potential mechanism for patients receiving chemotherapy. METHODS: 8-week old BALB/c female mice were randomly assigned into four groups (control; rapamycin; cyclophosphamide; and rapamycin combined with cyclophosphamide). Hematoxylin staining, immunohistochemical, TUNEL, western blotting and ELISA were employed to assess inter-group differences using Student's t-test and Mann-Whitney test...
August 16, 2017: Journal of Ovarian Research
https://www.readbyqxmd.com/read/28814191/maternal-overweight-disrupts-the-sexual-maturation-of-the-offspring
#3
Rocío A Galarza, Eric A Rhon Calderón, Analía E Cortez, Alicia G Faletti
The aims of the present work were to study the effect of maternal overweight and obesity on the ovarian reserve, follicular development, and ovulation of the offspring and to assess whether this maternal condition alters oocyte integrity. To this end, female offspring from rats fed standard (OSD) or cafeteria (OCD) diet were used. Body weight, vaginal opening, and estrous cycle were recorded and ovaries were obtained on the day of the second estrus. In addition, ovarian weight, ovulation rate (measured by the number of oocytes within oviducts), follicular development (determined by histology), and oocyte integrity were examined...
September 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28807722/coronary-microvascular-dysfunction-is-not-associated-with-a-history-of-reproductive-risk-factors-in-women-with-angina-pectoris-an-ipower-substudy
#4
Hannah Elena Suhrs, Anna Meta Kristensen, Anna Bay Rask, Marie Mide Michelsen, Daria Frestad, Naja Dam Mygind, Kira Bové, Eva Prescott
BACKGROUND: Reproductive risk factors such as preeclampsia and recurrent miscarriages have been associated with adverse cardiovascular (CV) events. Underlying coronary microvascular dysfunction (CMD) may be a common denominator. PURPOSE: We investigated whether a history of reproductive risk factors was associated with CMD in women with angina pectoris and no obstructive coronary artery disease (CAD). METHODS: Participants from the iPOWER study, including women with angina pectoris and no obstructive CAD (<50% stenosis), were invited to complete an electronic survey regarding reproductive risk factors: recurrent miscarriages, gestational diabetes, preeclampsia, rhesus immunity, polycystic ovary syndrome and menopausal status as well as migraine and Raynaud phenomenon...
August 11, 2017: Maturitas
https://www.readbyqxmd.com/read/28805302/torix-group-rickettsia-are-widespread-in-culicoides-biting-midges-diptera-ceratopogonidae-reach-high-frequency-and-carry-unique-genomic-features
#5
Jack Pilgrim, Mats Ander, Claire Garros, Matthew Baylis, Gregory D D Hurst, Stefanos Siozios
There is increasing interest in the heritable bacteria of invertebrate vectors of disease as they present novel targets for control initiatives. Previous studies on biting midges (Culicoides spp.), known to transmit several RNA viruses of veterinary importance, have revealed infections with the endosymbiotic bacteria, Wolbachia and Cardinium. However, rickettsial symbionts in these vectors are underexplored. Here, we present the genome of a previously uncharacterized Rickettsia endosymbiont from Culicoides newsteadi (RiCNE)...
August 14, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28804932/kisspeptin-regulates-ovarian-steroidogenesis-during-delayed-embryonic-development-in-the-fruit-bat-cynopterus-sphinx
#6
Anuradha, Amitabh Krishna
Cynopterus sphinx, a fruit bat, undergoes delayed embryonic development during the winter months, a period that corresponds to low levels of progesterone and estradiol synthesis by the ovary. Kisspeptins (KPs) are a group of neuropeptide hormones that act via G-protein coupled receptor 54 (GPR54) to stimulate hypothalamic secretion of Gonadotropin-releasing hormone, thereby regulating ovarian steroidogenesis, folliculogenesis, and ovulation. GPR54 is also expressed in the ovary, suggesting a direct role for KPs in ovarian steroidogenesis...
August 14, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28804876/insulin-resistance-in-pregnant-women-with-and-without-polycystic-ovary-syndrome-and-measures-of-body-composition-in-offspring-at-birth-and-3-years-of-age
#7
Sara Kristín Finnbogadóttir, Dorte Glintborg, Tina Kold Jensen, Henriette Kyhl, Ellen A Nohr, Marianne Andersen
Polycystic ovary syndrome (PCOS) is associated with obesity and insulin resistance in the non-pregnant state, but little is known about insulin sensitivity in the pregnant state. Our objective was to compare insulin resistance in pregnant women with and without PCOS and explore the impact of PCOS on body composition in offspring at birth and at 3 years of age MATERIAL AND METHODS: A prospective cohort study including 2548 live born singleton mother-child pairs residing in Odense municipality, Denmark, during 2010-2013...
August 14, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28799235/dipeptidyl-peptidase-4-serum-activity-and-concentration-are-increased-in-women-with-polycystic-ovary-syndrome
#8
Sindy Blauschmidt, Thomas Greither, Katharina Lampe, Solveig Köller, Petra Kaltwaßer, Hermann M Behre
OBJECTIVE: Polycystic ovary syndrome (PCOS) is a complex disease, the etiology of which is not well understood. Alterations in potential candidate genes involved in the biosynthesis and metabolism of androgens, folliculogenesis, and insulin and glucose metabolism have been suggested as possible etiologies. Dipeptidyl peptidase-4 (DPP4) plays a key role in glucose homeostasis and, thus, in the regulation of insulin secretion. The aim of our study was to analyze the DPP4 activity and concentrations in the serum of PCOS and non-PCOS patients and, additionally, study the activation of the DPP4 promoter by androgens in vitro...
August 11, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28795765/vitamin-d-predictors-in-polycystic-ovary-syndrome-a-meta-analysis
#9
Flora Bacopoulou, Evangelia Kolias, Vasiliki Efthymiou, Constantine N Antonopoulos, Evangelia Charmandari
BACKGROUND: The aim of this meta-analysis was to examine differences and predictors of serum 25-hydroxyvitamin D concentrations in women with polycystic ovary syndrome (PCOS) compared with non-PCOS controls matched for body mass index. MATERIALS AND METHODS: Three databases were searched (2003-2015) to retrieve studies that evaluated serum 25-hydroxyvitamin D in PCOS women and controls. Meta-regression analysis was performed with anthropometric and metabolic/endocrine parameters as covariates...
August 10, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28782842/diabetes-risk-in-women-with-gestational-diabetes-mellitus-and-a-history-of-polycystic-ovary-syndrome-a-retrospective-cohort-study
#10
R Bond, R Pace, E Rahme, K Dasgupta
AIMS: To investigate whether polycystic ovary syndrome further increases postpartum diabetes risk in women with gestational diabetes mellitus and to explore relationships between polycystic ovary syndrome and incident diabetes in women who do not develop gestational diabetes. METHODS: This retrospective cohort study (Quebec Physician Services Claims; Hospitalization Discharge Databases; Birth and Death registries) included 34 686 women with gestational diabetes during pregnancy (live birth), matched 1:1 to women without gestational diabetes by age group, year of delivery and health region...
August 7, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28780921/neo-oogenesis-in-mammals
#11
Tania Janeth Porras-Gómez, Norma Moreno-Mendoza
Recently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals. The first evidence was found in prosimians and humans. However, these findings were not considered relevant because the predominant dogma for reproductive biology at the time was that of Zuckerman. This dogma states that female mammals are born with finite numbers of oocytes that decline throughout postnatal life...
August 7, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28762556/nadph-oxidase-5-nox5-induced-reactive-oxygen-signaling-modulates-normoxic-hif-1%C3%AE-and-p27-kip1-expression-in-malignant-melanoma-and-other-human-tumors
#12
Smitha Antony, Guojian Jiang, Yongzhong Wu, Jennifer L Meitzler, Hala R Makhlouf, Diana C Haines, Donna Butcher, Dave S Hoon, Jiuping Ji, Yiping Zhang, Agnes Juhasz, Jiamo Lu, Han Liu, Iris Dahan, Mariam Konate, Krishnendu K Roy, James H Doroshow
NADPH oxidase 5 (NOX5) generated reactive oxygen species (ROS) have been implicated in signaling cascades that regulate cancer cell proliferation. To evaluate and validate NOX5 expression in human tumors, we screened a broad range of tissue microarrays (TMAs), and report substantial overexpression of NOX5 in malignant melanoma and cancers of the prostate, breast, and ovary. In human UACC-257 melanoma cells that possesses high levels of functional endogenous NOX5, overexpression of NOX5 resulted in enhanced cell growth, increased numbers of BrdU positive cells, and increased γ-H2AX levels...
August 1, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28752542/steady-relentless-progress-towards-effective-safe-screening-for-early-detection-of-cancer-of-the-ovary
#13
Ian Jacobs
The quest for early detection of ovarian cancer (OC), in the hope of reducing mortality, began as soon as the correlation between stage and survival were documented >50 years ago. Research commenced in earnest in the 1980s when the CA 125 test became available(1) and ultrasound technology was able to image the ovary(2) . The challenges were quickly recognised. Alongside acceptability, compliance and cost two issues needed addressing before large randomised trials with mortality as an end point could be justified...
July 28, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28748640/expression-of-nad-p-h-quinone-dehydrogenase-1-nqo1-is-increased-in-the-endometrium-of-women-with-endometrial-cancer-and-women-with-polycystic-ovary-syndrome
#14
William Atiomo, Mohamad Nasir Shafiee, Caroline Chapman, Veronika M Metzler, Jad Abouzeid, Ayşe Latif, Amy Chadwick, Sarah Kitson, Vanitha N Sivalingam, Ian J Stratford, Catrin S Rutland, Jenny L Persson, Niels Ødum, Pablo Fuentes-Utrillia, Jennie N Jeyapalan, David M Heery, Emma J Crosbie, Nigel P Mongan
OBJECTIVE: Women with a prior history of polycystic ovary syndrome (PCOS) have an increased risk of endometrial cancer (EC). AIM: To investigate whether the endometrium of women with PCOS possess gene expression changes similar to those found in EC. DESIGN AND METHODS: Patients with EC, PCOS and control women unaffected by either PCOS or EC were recruited into a cross-sectional study at the Nottingham University Hospital, UK. For RNA sequencing, representative individual endometrial biopsies were obtained from women with EC, PCOS and a woman unaffected by PCOS or EC...
July 27, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28745022/characterized-cantharidin-distribution-and-related-gene-expression-patterns-in-tissues-of-blister-beetles-epicauta-chinensis-laporte
#15
Ming Jiang, Shu-Min Lü, Zi-Yi Qi, Ya-Lin Zhang
Cantharidin (CTD), a terpenoid defensive toxin mainly produced by blister beetles, is widely known by its toxicity to both cancer cells and pests. However, little information is known about its biosynthesis in blister beetles. In this study, we firstly determined the CTD content in various tissues of adult blister beetles on different days after mating, and then detected the temporal and spatial expression patterns of genes related to CTD biosynthesis in Epicauta chinensis. Results revealed that the accessory gland is the source of the highest CTD production...
July 26, 2017: Insect Science
https://www.readbyqxmd.com/read/28734047/preselection-of-recombinant-gene-integration-sites-enabling-high-transcription-rates-in-cho-cells-using-alternate-start-codons-and-recombinase-mediated-cassette-exchange
#16
Martina Baumann, Elisabeth Gludovacz, Natalie Sealover, Scott Bahr, Henry George, Nan Lin, Kevin Kayser, Nicole Borth
Site-specific Recombinase Mediated Cassette Exchange (RMCE) enables the transfer of the gene of interest (GOI) into pre-selected genomic locations with defined expression properties. For the generation of recombinant production cell lines this has the advantage that screening for high transcription rates at the genome integration site would be required only once, with the possibility to reuse the selected site for new products. Here we describe a strategy that aims at the selection of transcriptionally active genome integration sites in Chinese Hamster Ovary (CHO) cells by using alternate start codons in the surface reporter protein CD4, in combination with FACS sorting for high expressers...
July 22, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28733292/natural-history-of-autoimmune-primary-ovarian-insufficiency-in-patients-with-addison-s-disease-from-normal-ovary-function-to-overt-ovary-dysfunction
#17
Annamaria De Bellis, Giuseppe Bellastella, Alberto Falorni, Ernesto Aitella, Mariluce Barrasso, Maria Ida Maiorino, Elio Bizzarro, Antonio Bellastella, Dario Giugliano, Katherine Esposito
CONTEXT: Women with autoimmune Addison's disease with normally ovulatory cycles but positive for steroid cells antibodies (StCA) have been considered at risk of premature ovarian insufficiency (POI). DESIGN: Thirty-three women younger than 40 years, with subclinical-clinical Addison's disease but with normally ovulatory menses, were followed-up for 10 years to evaluate the long-term time-related variations of StCA, ovarian function and follicular reserve. All patients and 27 control women were investigated at start and every year for the presence and titer of StCA (by indirect immunofluorescence), serum concentrations of anti-Mullerian hormone (AMH) and ovarian function along four consecutive menses every year...
July 21, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28730678/prognosis-following-cancer-surgery-during-holiday-periods
#18
Jesper Lagergren, Fredrik Mattsson, Pernilla Lagergren
Surgery is the mainstay curative treatment in most cancer. We aimed to test the new hypothesis that cancer surgery performed during holiday periods is associated with worse long-term prognosis than for non-holiday periods. This nationwide Swedish population-based cohort study included 228,927 patients during 1997-2014 who underwent elective resectional surgery for a cancer where the annual number of resections was over 100. The 16 eligible cancer sites were grouped into 10 cancer groups. The exposure, holiday periods, was classified as wide (14-weeks) or narrow (7-weeks)...
July 21, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28727165/increased-fibre-and-reduced-trans-fatty-acid-intake-are-primary-predictors-of-metabolic-improvement-in-overweight-polycystic-ovary-syndrome-substudy-of-randomized-trial-between-diet-exercise-and-diet-plus-exercise-for-weight-control
#19
Åsa Nybacka, Per M Hellström, Angelica L Hirschberg
OBJECTIVE: Polycystic ovary syndrome (PCOS) is commonly affected by obesity. PCOS phenotypes are prone to increased waist/hip ratio, insulin resistance and dyslipidaemia. This substudy was undertaken to evaluate the effects of lifestyle interventions on metabolic biomarkers in overweight/obese PCOS women, and the interventional effects of dietary components related to metabolic outcomes. DESIGN: Randomized three-arm parallel study. PATIENTS: Fifty-seven PCOS women (BMI >27kg/m(2) , age 18-40) were randomly assigned to diet (D, n=19), exercise (E, n=19) or diet plus exercise (DE, n=19) in three-arm fashion over 16 weeks...
July 20, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28726323/characterization-of-a-cathepsin-d-protease-from-cho-cell-free-medium-and-mitigation-of-its-impact-on-the-stability-of-a-recombinant-therapeutic-protein
#20
Amareth Lim, Brandon L Doyle, Gerard M Kelly, Angelia M Reed-Bogan, Lawrence H Breen, Parviz A Shamlou, Peter K Lambooy
During purification process development of a recombinant therapeutic protein, an endoproteolytic activity endogenous to the Chinese hamster ovary (CHO) cells and leading to degradation at particular hydrophobic amino acid residues (e.g., Phe and Trp) was observed when processing at acidic pH. The presence of residual levels of protease activity in purified protein batches affected the inherent activity of the product when stored as a solution. In order to develop a robust purification strategy to minimize this undesirable impact, identification and characterization of this protease was essential to ultimately ensure that a solution formulation was stable for many years...
July 20, 2017: Biotechnology Progress
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