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https://www.readbyqxmd.com/read/28530188/simple-assay-for-screening-phytoestrogenic-compounds-using-the-oestrogen-receptor-immobilised-magnetite-nanoparticles
#1
Pimchanok Busayapongchai, Sineenat Siri
With increasing interests of phytoestrogens for their potential applications, a rapid and simple tool for screening these phytochemicals is still required. In this study, a simple assay to detect phytoestrogens was developed based on the competition binding between the tested samples and the fluorescently labelled oestrogen (E2) to the human ligand binding domain of oestrogen receptor (LBD-ER) that was immobilised on the magnetite nanoparticles (MNPs). The 40-kDa LBD-ER peptide was produced in an Escherichia coli system...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28524239/oral-contraceptive-pills-risky-or-protective-in-case-of-trichinella-spiralis-infection
#2
Marwa A Hasby Saad, Dina A Radi, Eiman A Hasby
AIM: to investigate how Trichinella spiralis infection can be affected by contraceptive pills invivo. METHODS: included six groups of female Wistar rats; healthy, Trichinella infected, receiving combined contraceptive pills (COCPs), receiving progestin only pills (POPs), infected receiving COCPs and infected receiving POPs. Parasite burden was measured (two gender worm counts, gravidity, larvae/muscle and RCI). Histopathological examination, immunohistochemical detection of C-kit mast cells & Foxp3+ T-reg...
May 19, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28524047/oestrogen-and-progesterone-receptor-in-melanoma-and-nevi-an-immunohistochemical-study
#3
Emi Dika, Pier Alessandro Fanti, Sabina Vaccari, Elisa Capizzi, Alessio Degiovanni, Agnese Gobbi, Bianca Maria Piraccini, Simone Ribero, Carlotta Baraldi, Giulia Maria Ravaioli, Michelangelo Fiorentino, Annalisa Patrizi
The effect of hormonal stimulation and fertility treatments, as well as their role in the development of malignant melanoma (MM), is still to be determined. The aim of this study was to investigate the presence of oestrogen receptor alpha (ERα) and progesterone receptor (PR) in MM and nevi after hormonal stimulation. Immunohistochemical analyses were performed utilizing antibodies specifically directed against ERα and PR in MM and atypical nevi specimens from patients: (1) diagnosed during pregnancy, (2) diagnosed in the six months following delivery, or (3) who had undergone repetitive cycles of hormonal stimulation for in vitro fertilization in the year that preceded MM diagnosis...
May 19, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/28511462/story-of-a-giant-endometrial-polyp-in-asymptomatic-postmenopausal-female
#4
Jahnavi Meena, Rahul Manchanda, Sudhir Kulkarni, Nirmal Bhargava, Priyanka Mahawar
Endometrial polyps are localized overgrowth of endometrial glands and stoma through the uterine cavity. They are associated with postmenopausal bleeding, infertility and menorrhagia and are affected by unbalanced oestrogen therapy or increased frequency of tamoxifen exposure. We report a case of giant endometrial polyp in postmenopausal female without vaginal bleeding and hormone or drug use. A 65-year-old, postmenopausal female P3L2 with hypertension and Diabetes Mellitus (DM) came for routine health check-up...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28510570/bag-1-as-a-biomarker-in-early-breast-cancer-prognosis-a-systematic-review-with-meta-analyses
#5
E S Papadakis, T Reeves, N H Robson, T Maishman, G Packham, R I Cutress
BACKGROUND: The co-chaperone protein Bcl-2-associated athanogene-1 (BAG-1) is overexpressed in breast cancer and has been incorporated in the oncotype DX and PAM50 breast cancer prognostic assays. Bcl-2-associated athanogene-1 exists as multiple protein isoforms that interact with diverse partners, including chaperones Hsc70/Hsp70, Ser/Thr kinase Raf-1 and Bcl-2, to promote cancer cell survival. The BAG-1L isoform specifically binds to and increases the transcriptional activity of oestrogen receptor in cells, and in some, but not all studies, BAG-1 expression is predictive of clinical outcome in breast cancer...
May 16, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28501763/optimal-duration-of-adjuvant-chemotherapy-for-high-risk-node-negative-n-breast-cancer-patients-6-year-results-of-the-prospective-randomised-multicentre-phase-iii-unicancer-pacs-05-trial-ucbg-0106
#6
Pierre Kerbrat, Isabelle Desmoulins, Lise Roca, Christelle Levy, Alain Lortholary, Alain Marre, Rémy Delva, Maria Rios, Patrice Viens, Étienne Brain, Daniel Serin, Magali Edel, Marc Debled, Mario Campone, Marie-Ange Mourret-Reynier, Thomas Bachelot, Marie-Josèphe Foucher-Goudier, Bernard Asselain, Jérôme Lemonnier, Anne-Laure Martin, Henri Roché
PURPOSE: Optimal duration of adjuvant chemotherapy in the treatment of early-stage breast cancer remained to be investigated rigorously for the standard regimens in widespread use in North America (doxorubicin/cyclophosphamide, AC) and Europe (5-fluorouracil/epirubicin/cyclophosphamide, FEC). Whether six cycles of FEC 100 present an advantage, or not, compared with only four cycles was tested directly in a phase III prospective multicentre trial. PATIENTS AND METHODS: Between 2002 and 2006, 1515 women between 18 and 65°years of age, with node negative N(-) high-risk early-stage breast cancer, were included in the study following breast surgery and axillary lymph node dissection or procedure by sentinel node technique...
May 11, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28500289/stapled-big3-helical-peptide-erap-potentiates-anti-tumour-activity-for-breast-cancer-therapeutics
#7
Tetsuro Yoshimaru, Keisuke Aihara, Masato Komatsu, Yosuke Matsushita, Yasumasa Okazaki, Shinya Toyokuni, Junko Honda, Mitsunori Sasa, Yasuo Miyoshi, Akira Otaka, Toyomasa Katagiri
Estradiol (E2) and the oestrogen receptor-alpha (ERα) signalling pathway play pivotal roles in the proliferative activity of breast cancer cells. Recent findings show that the brefeldin A-inhibited guanine nucleotide-exchange protein 3-prohibitin 2 (BIG3-PHB2) complex plays a crucial role in E2/ERα signalling modulation in breast cancer cells. Moreover, specific inhibition of the BIG3-PHB2 interaction using the ERα activity-regulator synthetic peptide (ERAP: 165-177 amino acids), derived from α-helical BIG3 sequence, resulted in a significant anti-tumour effect...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28498913/the-management-of-menopause-in-women-with-a-history-of-endometriosis-a-systematic-review
#8
L C Gemmell, K E Webster, S Kirtley, K Vincent, K T Zondervan, C M Becker
BACKGROUND: Endometriosis is typically regarded as a premenopausal disease, resolving after natural or iatrogenic menopause due to declining oestrogen levels. Nonetheless, case reports over the years have highlighted the incidence of recurrent postmenopausal endometriosis. It is now clear that both recurrence and malignant transformation of endometriotic foci can occur in the postmenopausal period. Postmenopausal women are commonly treated with hormone replacement therapy (HRT) to treat climacteric symptoms and prevent bone loss; however, HRT may reactivate endometriosis and stimulate malignant transformation in women with a history of endometriosis...
May 11, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28498567/uterine-fibroids-from-observational-epidemiology-to-clinical-management
#9
Paolo Vercellini, Maria Pina Frattaruolo
According to this systematic review of epidemiological studies, fibroid prevalence varied widely, with no consistent association across studies between observed estimates and country, methodology, and population. Fibroid incidence was higher in black than in white women independently of other risk factors, suggesting a racial predisposition. A genetic influence was confirmed also by the association with a positive family history. The association with age and menopausal status maybe interpreted in terms of varying degrees of oestrogen exposure, which could explain also the association with food additives and soybean consumption...
May 12, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28497386/oral-contraceptive-pill-use-and-the-susceptibility-to-markers-of-exercise-induced-muscle-damage
#10
K M Hicks, G Onambélé-Pearson, K Winwood, C I Morse
PURPOSE: Firstly, to establish whether oral contraceptive pill (OCP) users are more susceptible to muscle damage compared to non-users, and secondly, to establish whether differences can be attributed to differences in patella tendon properties. METHODS: Nine female OCP users and 9 female non-users participated in the investigation. Combining dynamometry, electromyography and ultrasonography, patella tendon properties and vastus lateralis architectural properties were measured pre and during the first of 6 sets of 12 maximal voluntary eccentric knee extensions...
May 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28494267/advanced-glycation-products-levels-and-mechanical-properties-of-vaginal-tissue-in-pregnancy
#11
Homayemem K Weli, Riaz Akhtar, Zhuo Chang, Wen-Wu Li, Jason Cooper, Ying Yang
OBJECTIVES: Non-enzymatic glycation is closely associated with altered mechanical properties of connective tissue. Pregnancy, marked with high levels of female hormones, confers unique alteration to the mechanical properties of pelvic connective tissues in order to meet their physiological demands. However, there are few studies on glycation content and its influence on the mechanical properties of pelvic connective tissues during pregnancy. We hypothesise that the glycation content in pelvic tissues will change with a corresponding alteration in their mechanical properties, and that these changes are influenced by hormone levels...
April 23, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28492543/basp1-interacts-with-oestrogen-receptor-%C3%AE-and-modifies-the-tamoxifen-response
#12
Lindsey A Marsh, Samantha Carrera, Jayasha Shandilya, Kate J Heesom, Andrew D Davidson, Kathryn F Medler, Stefan Ge Roberts
Tamoxifen binds to oestrogen receptor α (ERα) to elicit distinct responses that vary by cell/tissue type and status, but the factors that determine these differential effects are unknown. Here we report that the transcriptional corepressor BASP1 interacts with ERα and in breast cancer cells, this interaction is enhanced by tamoxifen. We find that BASP1 acts as a major selectivity factor in the transcriptional response of breast cancer cells to tamoxifen. In all, 40% of the genes that are regulated by tamoxifen in breast cancer cells are BASP1 dependent, including several genes that are associated with tamoxifen resistance...
May 11, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28491323/interactions-between-oestrogen-and-1%C3%AE-25-oh-2-vitamin-d3-signalling-and-their-roles-in-spermatogenesis-and-spermatozoa-functions
#13
Ana Paula Zanatta, Vanessa Brouard, Camille Gautier, Renata Goncalves, Hélène Bouraïma-Lelong, Fátima Regina Mena Barreto Silva, Christelle Delalande
Oestrogens and 1α,25(OH)2-vitamin D3 (1,25-D3) are steroids that can provide effects by binding to their receptors localised in the cytoplasm and in the nucleus or the plasma membrane respectively inducing genomic and non-genomic effects. As confirmed notably by invalidation of the genes, coding for their receptors as tested with mice with in vivo and in vitro treatments, oestrogens and 1,25-D3 are regulators of spermatogenesis. Moreover, some functions of ejaculated spermatozoa as viability, DNA integrity, motility, capacitation, acrosome reaction and fertilizing ability are targets for these hormones...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28484080/neoadjuvant-chemotherapy-increases-rates-of-breast-conserving-surgery-in-early-operable-breast-cancer
#14
V Cm Man, P Sy Cheung
INTRODUCTION: Neoadjuvant chemotherapy is commonly used in stage III breast cancer for disease down-staging. Its use has now been extended to early breast cancer to increase the rate of breast-conserving surgery. This study aimed to evaluate the effectiveness of neoadjuvant chemotherapy in early operable cancers. METHODS: A retrospective study was carried out at the Hong Kong Sanatorium & Hospital of 102 patients with stage I to III primary breast cancer. All patients who underwent neoadjuvant chemotherapy followed by definitive breast surgery between January 2004 and July 2013 were included...
May 9, 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28479233/addition-of-gemcitabine-to-paclitaxel-epirubicin-and-cyclophosphamide-adjuvant-chemotherapy-for-women-with-early-stage-breast-cancer-tango-final-10-year-follow-up-of-an-open-label-randomised-phase-3-trial
#15
Helena M Earl, Louise Hiller, Helen C Howard, Janet A Dunn, Jennie Young, Sarah J Bowden, Michelle McDermaid, Anna K Waterhouse, Gregory Wilson, Rajiv Agrawal, Susan O'Reilly, Angela Bowman, Diana M Ritchie, Andrew Goodman, Tamas Hickish, Karen McAdam, David Cameron, David Dodwell, Daniel W Rea, Carlos Caldas, Elena Provenzano, Jean E Abraham, Peter Canney, John P Crown, M John Kennedy, Robert Coleman, Robert C Leonard, James A Carmichael, Andrew M Wardley, Christopher J Poole
BACKGROUND: The tAnGo trial was designed to investigate the potential role of gemcitabine when added to anthracycline and taxane-containing adjuvant chemotherapy for early breast cancer. When this study was developed, gemcitabine had shown significant activity in metastatic breast cancer, and there was evidence of a favourable interaction with paclitaxel. METHODS: tAnGo was an international, open-label, randomised, phase 3 superiority trial that enrolled women aged 18 years or older with newly diagnosed, early-stage breast cancer who had a definite indication for chemotherapy, any nodal status, any hormone receptor status, Eastern Cooperative Oncology Group performance status of 0-1, and adequate bone marrow, hepatic, and renal function...
May 4, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28478727/local-upregulation-of-transient-receptor-potential-ankyrin-1-and-transient-receptor-potential-vanilloid-1-ion-channels-in-rectosigmoid-deep-infiltrating-endometriosis
#16
Noémi Bohonyi, Krisztina Pohóczky, Bálint Szalontai, Anikó Perkecz, Krisztina Kovács, Béla Kajtár, Lajos Orbán, Tamás Varga, Sarolta Szegedi, József Bódis, Zsuzsanna Helyes, Miklós Koppán
Transient Receptor Potential Vanilloid 1 (TRPV1) and Transient Receptor Potential Ankyrin 1 (TRPA1) expressed mainly by primary sensory neurons function as major nociceptive integrators. They are also present on the rat endometrium in an oestrogen-regulated manner. TRPV1 is upregulated in peritoneal and ovarian endometriosis patients, but there is no information about TRPA1 and their pathophysiological significances. In this study, patients undergoing laparoscopic surgery were investigated: severe dysmenorrhoea due to rectosigmoid deep infiltrating endometriosis ( n = 15), uterine fibroid-induced moderate dysmenorrhoea ( n = 7) and tubal infertility with no pain ( n = 6)...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28464792/detection-and-comparison-of-micrornas-in-the-caprine-mammary-gland-tissues-of-colostrum-and-common-milk-stages
#17
Jinxing Hou, Xiaopeng An, Yuxuan Song, Binyun Cao, Heping Yang, Zhou Zhang, Wenzheng Shen, Yunpu Li
BACKGROUND: MicroRNAs (miRNAs) have a great influence on various physiological functions. A lot of high-throughput sequencing (HTS) research on miRNAs has been executed in the caprine mammary gland at different lactation periods (common milk lactation and dry period), but little is known about differentially expressed miRNAs in the caprine mammary gland of colostrum and peak lactation periods. RESULT: This study identified 131 differentially expressed miRNAs (P < 0...
May 2, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28461242/genistein-crosses-the-bioartificial-oviduct-and-alters-secretion-composition
#18
Constantine A Simintiras, Roger G Sturmey
The dietary derived isoflavone and oestrogen analogue, genistein, is known to perturb fundamental reproductive events such as implantation and embryo cleavage. However the question of whether genistein is able to traverse the oviduct epithelial monolayer and impact oviduct fluid secretion remains unclear. This study tests these research questions using a bioartificial oviduct to show that genistein permeates the oviduct lumen in vitro with a biphasic (burst and plateau) kinetic profile, faster than spontaneous diffusion, and alters the amino acid composition of in vitro derived oviduct fluid (ivDOF) but not as an oestrogen analogue...
April 28, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28461075/rfsh-in-medically-assisted-procreation-evidence-for-ovarian-follicular-hyperplasia-and-interest-of-mass-spectrometry-to-measure-17-hydroxyprogesterone-and-%C3%AE-4-androstenedione-in-serum
#19
M C Menet, M L Hebert-Schuster, N Lahlou, L Marcellin, M C Leguy, V Gayet, J Guibourdenche
Ovarian monitoring requires the determination of serum estradiol and progesterone levels. We investigated whole follicular steroidogenesis under rFSH in medically assisted procreation (MAP: 26 IVF, 24 ICSI) compared to 11 controls (IUI). Estrone, estradiol, Δ4-androstenedione, testosterone, progesterone and 17-hydroxyprogesterone were measured by immunoassay and mass spectrometry except for estrogens. At the start of a spontaneous or induced cycle, steroids levels fluctuated within normal ranges: estradiol (314-585 pmol/L), estrone (165-379 pmol/L) testosterone (1...
April 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28460465/functional-characterisation-of-a-novel-ovarian-cancer-cell-line-nuoc-1
#20
Aiste McCormick, Eleanor Earp, Katherine Elliot, Gavin Cuthbert, Rachel O'Donnell, Brian T Wilson, Ruth Sutton, Charlotte Leeson, Huw D Thomas, Helen Blair, Sarah Fordham, John Lunec, James Allan, Richard J Edmondson
BACKGROUND: Cell lines provide a powerful model to study cancer and here we describe a new spontaneously immortalised epithelial ovarian cancer cell line (NUOC-1) derived from the ascites collected at a time of primary debulking surgery for a mixed endometrioid / clear cell / High Grade Serous (HGS) histology. RESULTS: This spontaneously immortalised cell line was found to maintain morphology and epithelial markers throughout long-term culture. NUOC-1 cells grow as an adherent monolayer with a doubling time of 58 hours...
April 18, 2017: Oncotarget
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