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https://www.readbyqxmd.com/read/28732350/the-prevalence-of-polycystic-ovary-syndrome-in-reproductiveaged-women-of-different-ethnicity-a-systematic-review-and-meta-analysis
#1
Tao Ding, Paul J Hardiman, Irene Petersen, Fang-Fang Wang, Fan Qu, Gianluca Baio
The prevalence of PCOS was investigated in many studies in different continents. However, there is no established prevalence of PCOS for distinct ethnic groups. In the current analysis, we conducted searches in PubMed, The Cochrane Library, EMBASE, CINAHL up to Jan. 2017 to identify studies reporting prevalence of PCOS in the general female population. Forty-two studies were identified, with 13 eligible for evidence synthesis. The prevalence among different ethnicity was estimated using random effect modelling...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732339/aryl-and-alkyl-phosphorus-containing-flame-retardants-induced-mitochondrial-impairment-and-cell-death-in-chinese-hamster-ovary-cho-k1-cells
#2
Chao Huang, Na Li, Shengwu Yuan, Xiaoya Ji, Mei Ma, Kaifeng Rao, Zijian Wang
Phosphorus-containing flame retardants (PFRs) are increasingly in demand worldwide as replacements for brominated flame retardants (BFRs), but insufficient available toxicological information on PFRs makes assessing their health risks challenging. Mitochondria are important targets of various environmental pollutants, and mitochondrial dysfunction may lead to many common diseases. In the present study, mitochondria impairment-related endpoints were measured by a high content screening (HCS) assay for 11 selected non-halogen PFRs in Chinese hamster ovary (CHO-k1) cells...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732234/computational-modelling-of-genome-scale-metabolic-networks-and-its-application-to-cho-cell-cultures
#3
REVIEW
Živa Rejc, Lidija Magdevska, Tilen Tršelič, Timotej Osolin, Rok Vodopivec, Jakob Mraz, Eva Pavliha, Nikolaj Zimic, Tanja Cvitanović, Damjana Rozman, Miha Moškon, Miha Mraz
Genome-scale metabolic models (GEMs) have become increasingly important in recent years. Currently, GEMs are the most accurate in silico representation of the genotype-phenotype link. They allow us to study complex networks from the systems perspective. Their application may drastically reduce the amount of experimental and clinical work, improve diagnostic tools and increase our understanding of complex biological phenomena. GEMs have also demonstrated high potential for the optimisation of bio-based production of recombinant proteins...
July 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28730785/pdcd1-strengthens-the-sensitivity-of-ovarian-cancer-to-cisplatin-chemotherapy-by-promoting-apoptosis
#4
Qian Li, Jie-Fan Gao, Bing-Li Qi
PURPOSE: The primary purpose of this study was to make clear the role of PDCD1 in the occurrence and progression of ovarian cancer, and explain its mechanism. METHODS: RT-PCR, westem blot, MTT and immunohistochemistry were used to detect the expression levels of PDCD1 mRNA and protein in human ovarian cancer cell lines (SKOV3, 3AO, CAOV3 and OVCAR3), human normal ovary, serous cystadenoma, and serous cystadenocarcinoma tissue. SKOV3, SKOV3-MOCK, and SKOV3-PDCD1 cells were subcutaneously injected into the armpit of nude mice to observe the effect of PDCD1 expression on tumorigenic ability...
May 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28730678/prognosis-following-cancer-surgery-during-holiday-periods
#5
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/28730323/the-pathogenesis-diagnosis-and-management-of-metastatic-tumors-to-the-ovary-a-comprehensive-review
#6
REVIEW
Ondřej Kubeček, Jan Laco, Jiří Špaček, Jiří Petera, Jindřich Kopecký, Alena Kubečková, Stanislav Filip
Secondary tumors of the ovary account for 10-25% of all ovarian malignancies. The most common tumors that give rise to ovarian metastases include breast, colorectal, endometrial, stomach, and appendix cancer. The correct diagnosis of secondary ovarian tumors may be challenging as they are not infrequently misdiagnosed as primary ovarian cancer, particularly in the case of mucinous adenocarcinomas. The distinction from the latter is essential, as it requires different treatment. Immunohistochemistry plays an important role in distinguishing primary ovarian tumors from extra-ovarian metastases and, furthermore, may suggest the primary tumor site...
July 20, 2017: Clinical & Experimental Metastasis
https://www.readbyqxmd.com/read/28729436/regulation-of-adrenal-and-ovarian-steroidogenesis-by-mir-132
#7
Zhigang Hu, Wen-Jun Shen, Fredric B Kraemer, Salman Azhar
miR-132 is hormonally regulated in steroidogenic cells of the adrenal gland, ovary and testis. Here, we examined the potential role of miR-132 in the control of steroidogenesis. Transfection of Y1 adrenal cells with miR-132 increased mRNAs of 3β-HSD and 20α-HSD enzymes, which catalyze the sequential conversion of pregnenolone to progesterone to biologically inactive 20α-OHP. Overexpression of miR-132 reduced MeCP2 and StAR protein expression, basal progestin (progesterone and 20α-OHP) production, but enhanced their production in response to cAMP stimulation...
July 20, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28728581/a-gestational-choriocarcinoma-of-the-ovary-diagnosed-by-dna-polymorphic-analysis-a-case-report-and-systematic-review-of-the-literature
#8
Nan Jia, Yan Chen, Xiang Tao, Enzhi Ou, Xin Lu, Weiwei Feng
BACKGROUND: Choriocarcinoma of the ovary is rare. This tumor can arise from gestational tissue or pure germ cells of the ovary, the former results in gestational choriocarcinoma. The clinical characteristics and histology of both tumor types are identical, differentiation of these tumors is necessary for effective treatment. One strategy for the differentiation of these tumors types is to identify the presence of paternal DNA by DNA polymorphic analysis. CASE PRESENTATION: In the present case, a 27-year-old patient with a history of amenorrhea, lower abdominal pain and vaginal bleeding received a laparoscopic dissection of cystic mass of the right ovary according to an initial diagnosis of ectopic pregnancy...
July 20, 2017: Journal of Ovarian Research
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
#9
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/28727126/the-incidence-of-metabolic-syndrome-in-adolescents-with-different-phenotypes-of-pcos
#10
Kubra Zengin Altintas, Berna Dilbaz, Derya Akdag Cirik, Runa Ozelci, Tuba Zengin, Osman Nuri Erginay, Serdar Dilbaz
OBJECTIVES: To evaluate the incidence of metabolic syndrome in Turkish adolescents with different phenotypes of polycystic ovary syndrome (PCOS). MATERIAL AND METHODS: This cross-sectional study was performed on the Youth Center clinic of a tertiary referral hospital in Turkey. Adolescents with PCOS (n = 144) were classified into four phenotype groups according to the presence of oligo/anovulation (O), hyperandrogenism (H), and polycystic ovarian morphology (P) as follows: Phenotype A (O + H + P), Phenotype B (H + O), Phenotype C (H + P), Phenotype D (O + P)...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28727117/relationship-between-ovulation-rate-and-embryonic-characteristics-in-gilts-at-35-d-of-pregnancy
#11
C L A Da Silva, M L W J Broekhuijse, B F A Laurenssen, H A Mulder, E F Knol, B Kemp, N M Soede
This study investigated the relationship between ovulation rate (OR) and embryonic characteristics in gilts. Landrace ( = 86) and Yorkshire x Landrace ( = 212) gilts were inseminated with semen stored for 3 to 5 d (SS1, = 59), 6 to7 d (SS2, = 133), or 8 to 10 d (SS3, = 106), and slaughtered at 35 d of pregnancy. Ovulation rate was assessed by dissection of the corpora lutea on both ovaries. Embryos were classified as vital (VE) by visual appearance and individually weighed (VEg) and the SD of the weight calculated (SDVEg)...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727004/physiology-and-endocrinology-symposium-postnatal-reproductive-development-and-the-lactocrine-hypothesis
#12
F F Bartol, A A Wiley, A F George, D J Miller, C A Bagnell
Maternal effects on development can program cell fate and dictate offspring phenotype. Such effects do not end at birth, but extend into postnatal life through signals communicated from mother to offspring in first milk (colostrum). Transmission of bioactive factors from mother to offspring as a specific consequence of nursing defines a lactocrine mechanism. The female reproductive tract is not fully formed at birth (postnatal day = PND 0). Data for ungulates and mice indicate that disruption of development during neonatal life can have lasting effects on the form and function of uterine tissues...
May 2017: Journal of Animal Science
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
#13
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
https://www.readbyqxmd.com/read/28726207/approaches-to-controlled-co-amplification-of-genes-for-production-of-biopharmaceuticals-study-of-the-insertion-and-amplification-dynamics-of-genetic-cassettes-in-the-genome-of-chinese-hamster-ovary-cells-during-co-expression-of-compatible-pair-of-plasmids
#14
S V Kovnir, N A Orlova, Yu А Khodak, M P Kondrashova, A G Gabibov, K G Skryabin, A I Vorobiev, I I Vorobiev
Plasmid vector family p1.1 based on non-coding regions of Chinese hamster housekeeping gene EEF1A and concatemer of Epstein-Barr virus terminal repeat increases the frequency of genome integration and provides rapid amplification of the target genes in the genome. For a pair of fluorescent proteins eGFP and mCherry it was shown that p1.1 vectors bearing dihydrofolate reductase and glutamine synthetase selection markers upon co-transfection into CHO DG44 cell line allow obtaining a polyclonal cell population in which ~70% of cells express both genes...
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28725636/epithelial-to-mesenchymal-transition-in-the-female-reproductive-tract-from-normal-functioning-to-disease-pathology
#15
REVIEW
Olena Bilyk, Mackenzie Coatham, Michael Jewer, Lynne-Marie Postovit
Epithelial-to-mesenchymal transition (EMT) is a physiological process that is vital throughout the human lifespan. In addition to contributing to the development of various tissues within the growing embryo, EMT is also responsible for wound healing and tissue regeneration later in adulthood. In this review, we highlight the importance of EMT in the development and normal functioning of the female reproductive organs (the ovaries and the uterus) and describe how dysregulation of EMT can lead to pathological conditions, such as endometriosis, adenomyosis, and carcinogenesis...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28725153/ovulation-induction-by-metformin-among-obese-versus-non-obese-women-with-polycystic-ovary-syndrome
#16
Yazed Sulaiman Al-Ruthia, Hazem Al-Mandeel, Hisham AlSanawi, Wael Mansy, Reem AlGasem, Lama AlMutairi
OBJECTIVES: There is some evidence that the efficacy of metformin as an ovulation stimulation agent depends on the body mass index (BMI) of the treated anovulatory women with polycystic ovary syndrome (PCOS). The aim of this study was to examine the likelihood of successful ovulation among obese (BMI ⩾30 kg/m(2)) versus non-obese (BMI <30 kg/m(2)) women with PCOS. METHODS: A total of 243 medical charts of women with PCOS who visited King Khaled University Hospital (KKUH) in Riyadh, Saudi Arabia, between 2006 and 2012 were reviewed...
July 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28724848/laparoscopic-excision-of-a-uterine-adenomatoid-tumor-and-a-coexisting-ovarian-teratoma-a-case-report-and-literature-review
#17
Tomohiko Matsuhashi, Ryoko Matsui, Chikako Hasegawa, Tsutomu Hatori, Seiryu Kamoi, Toshiyuki Takeshita
Adenomatoid tumors (ATs) are rare, benign neoplasms occurring mainly in reproductive organs such as the uterus, ovaries, fallopian tubes, and testes. Uterine adenomatoid tumors (UATs) are generally incidentally diagnosed during histopathological examination of excisional biopsies performed for other indications, most commonly uterine leiomyomas. We herein present a 38-year-old woman who underwent laparoscopic excision of a uterine leiomyoma and a right ovarian teratoma. Microscopic examination of the excisional biopsy revealed that the enucleated uterine tumor was composed of proliferating glandular tissue covered with single-layered cells that were surrounded by proliferating smooth muscle cells, corresponding exactly to the features of UATs...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28724736/phenotypic-shift-in-wolbachia-virulence-towards-its-native-host-across-serial-horizontal-passages
#18
Winka Le Clec'h, Jessica Dittmer, Maryline Raimond, Didier Bouchon, Mathieu Sicard
Vertical transmission mode is predicted to decrease the virulence of symbionts. However, Wolbachia, a widespread vertically transmitted endosymbiont, exhibits both negative and beneficial effects on arthropod fitness. This 'Jekyll and Hyde' behaviour, as well as its ability to live transiently outside host cells and to establish new infections via horizontal transmission, may reflect the capacity of Wolbachia to exhibit various phenotypes depending on the prevailing environmental constraints. To study the ability of Wolbachia to readily cope with new constraints, we forced this endosymbiont to spread only via horizontal transmission...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28724621/mildew-resistance-locus-function-in-pollen-ovary-reception-is-linked-to-its-oligomerization-and-subcellular
#19
Daniel S Jones, Jing Yuan, Benjamin Smith, Andrew Willoughby, Emily L Kumimoto, Sharon A Kessler
Sexual reproduction in flowering plants requires communication between synergid cells and a tip-elongating pollen tube (PT) for the successful delivery of sperm cells to the embryo sac. The reception of the PT relies on signaling within the synergid cell that ultimately leads to the degeneration of the receptive synergid and PT rupture, releasing the sperm cells for double fertilization. In Arabidopsis thaliana, NORTIA (NTA), a member of the Mildew resistance locus O (MLO) family of proteins, plays a critical role in the communication processes regulating PT reception...
July 19, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28724271/comparison-of-histopathologic-features-of-endometrial-cancer-based-on-menopausal-status-and-safety-of-ovarian-preservation-in-premenopausal-women
#20
Ozgur Kan, Aysegul Alkilic, Elif Nazlı Cetindag Aydın, Kazibe Koyuncu, Salih Taskin, Firat Ortac
The aim of this study was to investigate the frequency of coexisting ovarian malignancy and to determine whether ovarian preservation is feasible in premenopausal endometrial cancer (EC) patients. The data of 251 patients with endometrioid type endometrial cancer were retrospectively reviewed. We classified patients into two groups based on menopausal status. Information regarding patient age, preoperative and intraoperative evaluations, pathology reports, and follow-up results were abstracted from medical records...
May 2017: Acta Medica Iranica
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