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Endocrine Connections

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https://www.readbyqxmd.com/read/29146887/targeted-therapy-of-gastroenteropancreatic-neuroendocrine-tumours-preclinical-strategies-and-future-targets
#1
Elke Tatjana Aristizabal Prada, Christoph J Auernhammer
Molecular targeted therapy of advanced neuroendocrine tumours (NETs) of the gastroenteropancreatic (GEP) system currently encompasses approved therapy with the mTOR-inhibitor everolimus and the multi-tyrosinkinase inhibitor sunitinib. However clinical efficacy of these treatment strategies is limited by low objective response rates and limited progression free survival due to tumor resistance. Further novel strategies for molecular targeted therapy of NETs of the GEP-system are needed. This paper reviews preclinical research models and signaling pathways in NETs of the GEP-system...
November 16, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29141991/human-sex-hormone-binding-globulin-does-not-provide-metabolic-protection-against-dysglycemia-in-mice
#2
Yael Sofer, Nava Nevo, Michal Vechoropulus, Gabi Shefer, Esther Osher, Nathan Landis, Geoffrey L Hammond, Naftali Stern
BACKGROUND: Sex hormone binding globulin (SHBG) is the main transporter of sex hormones in most vertebrates. Low SHBG levels have been linked to increased propensity for diabetes and metabolic syndrome. Polymorphisms of the SHBG gene linked to low SHBG protein levels, also strongly predicted increased risk of type 2 diabetes, thus raising the possibility that SHBG may play a role in the in the pathogenesis of insulin resistance and diabetes. AIM: To examine whether expression of human SHBG in mice may ameliorate the development of diabetes and metabolic syndrome in response to a high fat diet...
November 15, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29138235/brip1-overexpression-is-correlated-with-clinical-features-and-survival-outcome-of-luminal-breast-cancer-subtypes
#3
Ishita Gupta, Allal Ouhtit, Adil Al-Ajmi, Syed Gauhar A Rizvi, Hamad Al-Riyami, Marwa Al-Riyami, Yahya Tamimi
In Oman, breast cancer is most common, representing approximately more than 25% of all cancers in women. Relatively younger populations of patients (25 to 40 years) present surprisingly with an aggressive phenotype and advanced tumor stages. In this study, we investigated differential gene expressions in Luminal-A, Luminal-B, Triple negative and Her2+ breast cancer subtypes and compared data to benign tumor samples. We identified a potential candidate gene BRIP1, showing differential expression in the four breast cancer subtypes examined, suggesting that BRIP1 has the profile of a useful diagnostic marker, suitable for targeted therapeutic intervention...
November 14, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29133385/targeted-next-generation-sequencing-of-cancer-genes-in-poorly-differentiated-thyroid-cancer
#4
Tiemo S Gerber, Arno Schad, Nils Hartmann, Erik Springer, Ulrich Zechner, Thomas J Musholt
Poorly differentiated thyroid carcinoma (PDTC) is a rare malignancy with higher mortality than well-differentiated thyroid carcinoma. The histological diagnosis can be difficult as well as the therapy. Improved diagnosis and new targeted therapies require knowledge of DNA sequence changes in cancer-relevant genes. The TruSeq Amplicon Cancer Panel was used to screen cancer genomes from 25 PDTC patients for somatic single nucleotide variants in 48 genes known to represent mutational hotspots. A total of 4490 variants were found in 23 tissue samples of PDTC...
November 13, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29133384/estrogen-and-high-fat-diet-induced-alterations-in-c57bl-6-mice-endometrial-transcriptome-profile
#5
Yali Cheng, Qiaoying Lv, Bingying Xie, Bingyi Yang, Weiwei Shan, Chengcheng Ning, Bing Li, Liying Xie, Chao Gu, Xuezhen Luo, Xiaojun Chen, Qin Zhu
Unopposed estrogen stimulation and insulin resistance are known to play important roles in endometrial cancer (EC), but the interaction between these two factors and how they contribute to endometrial lesions are not completely elucidated. To investigate the endometrial transcriptome profile and the associated molecular pathway alterations, we established an ovariectomized C57BL/6 mouse model treated with subcutaneous implantation of 17-β estradiol (E2) pellet and/or high-fat diet (HFD) for 12 weeks to mimic sustained estrogen stimulation and insulin resistance...
November 13, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29133383/structured-education-programme-for-women-with-polycystic-ovary-syndrome-a-randomised-controlled-trial
#6
Hamidreza Mani, Yogini Chudasama, Michelle Hadjiconstantinou, Daniel H Bodicoat, Charlotte Edwardson, Miles Levy, Laura J Gray, Janette Barnett, Heather Daly, Trevor A Howlett, Kamlesh Khunti, Melanie J Davies
OBJECTIVE: To evaluate the effectiveness of a structured education programmes in women with polycystic ovary syndrome (PCOS). METHODS: Single centre, randomised controlled trial, testing a single exposure to a group-based, face-to-face, structured education programme. Inclusion criteria were women with PCOS, aged 18-49 years inclusive and Body Mass Index ≥ 23 kg/m2 for Black and Minority Ethnicities or ≥ 25 kg/m2 for White Europeans. Primary outcome was step count/day at 12 months...
November 13, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29117938/functional-characterization-of-avpr2-mutants-found-in-turkish-patients-with-nephrogenic-diabetes-insipidus
#7
Beril Erdem, Angela Schulz, Emel Saglar, Ferhat Deniz, Torsten Schoneberg, Hatice Mergen
Diabetes insipidus is a rare disorder characterized by an impairment in water balance because of the inability to concentrate urine. While central Diabetes insipidus is caused by mutations in the AVP, the reason for genetically determined nephrogenic Diabetes insipidus can be mutations in AQP2 or AVPR2. After release of AVP from posterior pituitary into blood stream it binds to AVPR2 which is one of the receptors for AVP and is mainly expressed in principal cells of collecting ducts of kidney. Receptor activation increases cAMP levels in principal cells, resulting in the incorporation of AQP2 into the membrane, finally increasing water reabsorption...
November 8, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29089365/cardiometabolic-healthy-and-unhealthy-obesity-does-vitamin-d-play-a-role
#8
Eliana Piantanida, Daniela Gallo, Giovanni Veronesi, Eugenia Dozio, Eugenia Trotti, Adriana Lai, Silvia Ippolito, Jessica Sabatino, Maria Laura Tanda, Antonio Toniolo, Marco Ferrario, Luigi Bartalena
The aim of this observational study was to clarify the link between vitamin D status and metabolic syndrome (MetS) in people with visceral obesity. Design and methods One-hundred-ninety-six consecutive patients (152 women; mean age 51±13 years) with visceral obesity [mean body weight 103±20 Kg, mean waist circumference (WC) 119±13 cm] were enrolled at the Obesity Outpatient Clinic of the University of Insubria in Varese. Anthropometric measurements were recorded. Laboratory tests, including vitamin D [25(OH)D)], fasting blood glucose (FBG), lipid profile, liver and kidney function tests were assessed...
October 31, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29089364/primary-adrenal-insufficiency-in-adult-population-a-portuguese-multicentre-study-by-the-adrenal-tumours-study-group
#9
Lia Ferreira, Joao Silva, Susana Garrido, Carlos Bello, Diana Oliveira, Hélder Simões, Isabel Paiva, Joana Guimarães, Marta Ferreira, Maria Teresa Pereira, Rita Bettencourt-Silva, Ana Filipa Martins, Tiago Silva, Vera Fernandes, Maria Ferreira
INTRODUCTION: Primary adrenal insufficiency (PAI) is a rare but severe and potentially life-threatening condition. No previous studies have characterized Portuguese patients with PAI. AIMS: To characterize the clinical presentation, diagnostic workup, treatment and follow-up of Portuguese patients with confirmed PAI. METHODS: This multicentre retrospective study examined PAI patients in 12 Portuguese hospitals. RESULTS: We investigated 278 patients with PAI (55...
October 31, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29079670/the-levels-of-adipokines-and-hormonal-changes-during-the-menstrual-cycle-in-normal-weight-women
#10
Katarzyna Wyskida, Grzegorz Franik, Tomasz Wikarek, Aleksander Owczarek, Alham Delroba, Jerzy Chudek, Jerzy Sikora, Magdalena Olszanecka-Glinianowicz
CONTEXT: The aim of this study was to assess plasma leptin, adiponectin, resistin, visfatin/NAMPT, omentin-1, vaspin, apelin, TNF-α, IL-6 and RBP4 levels in relation to hormonal changes during the menstrual cycle in young, healthy, normal-weight women. METHODS: The study involved 52 young, healthy, normal-weight women. Anthropometric parameters, body composition and levels of plasma leptin, adiponectin, resistin, visfatin/NAMPT, omentin-1, vaspin, apelin, TNF-α, IL-6 and RBP4 in addition to serum FSH, LH, estradiol, progesterone, 17-OH progesterone, androgens, SHBG and insulin concentrations were measured during a morning in fasting state three times: between days 2-4, days 12-14 and days 24-26 of the menstrual cycle...
October 27, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29074613/the-incidence-of-congenital-hypothyroidism-ch-in-guangxi-china-and-the-predictors-of-permanent-and-transient-ch
#11
Chunyun Fu, Shiyu Luo, Yingfeng Li, Qifei Li, Shangyang She, Xuehua Hu, Mengting Li, Yue Zhang, Jiasun Su, Xuyun Hu, Yun Chen, Jin Wang, Bobo Xie, Shujie Zhang, Jingsi Luo, Xin Fan, Shaoke Chen, Yiping Shen
OBJECTIVE: To investigate the incidence of CH in Guangxi, China, and to analyze the predictors that might allow for an early differentiation between permanent (P) and transient (T) CH. DESIGN AND METHODS: Blood samples were collected on filter paper between 3-7 days after birth, TSH level was measured by time-resolved fluorescence assay. Individuals with increased TSH levels detected by newborn screening were recalled for further evaluation by electrochemiluminescence assay...
October 26, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29074612/aip-mutations-in-brazilian-patients-with-sporadic-pituitary-adenomas-a-single-center-evaluation
#12
Paula Bruna Araujo, Leandro Kasuki, Carlos Henrique de Azeredo Lima, Liana Lumi Ogino, Aline H S Camacho, Leila Chimelli, Marta Korbonits, Monica R Gadelha
Aryl hydrocarbon receptor-interacting protein (AIP) gene mutations (AIPmut) are the most frequent germline mutations found in apparently sporadic pituitary adenomas (SPA). Our aim was to evaluate the frequency of AIPmut among young Brazilian patients with SPA. We performed an observational cohort study between 2013-2016 in a single referral center. AIPmut screening was carried out in 132 SPA patients with macroadenomas diagnosed up to 40 years, or in adenomas of any size diagnosed until 18 years of age. Twelve tumor samples were also analyzed...
October 26, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28874401/chemical-uv-filters-can-affect-human-sperm-function-in-a-progesterone-like-manner
#13
Anders Rehfeld, Dorte Egeberg, Kristian Almstrup, Jørgen Holm Petersen, Steen Dissing, Niels Erik Skakkebæk
Human sperm cell function must be precisely regulated to achieve natural fertilization. Progesterone released by the cumulus cells surrounding the egg induces a Ca2+-influx into human sperm cells via the CatSper Ca2+-channel and thereby controls sperm function. Multiple chemical UV filters have been shown to induce a Ca2+-influx through CatSper, thus mimicking the effect of progesterone on Ca2+-signaling. We hypothesized that these UV filters could also mimic the effect of progesterone on sperm function. We examined 29 UV filters allowed in sunscreens in the US and/or EU for their ability to affect acrosome reaction, penetration, hyperactivation, and viability in human sperm cells...
September 5, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29150545/tumour-diameter-is-not-reliable-for-management-of-non-secreting-pancreatic-neuroendocrine-tumours
#14
Logan Mills, Panagiotis Drymousis, Yogesh Vashist, Christoph Burdelski, Andreas Prachalias, Parthi Srinivasan, Krishna Menon, Corina Cotoi, Saboor Khan, Judith Cave, Thomas Armstrong, Martin O Weickert, Jakob Izbicki, Joerg Schrader, Andreja Frilling, John K Ramage, Raj Srirajaskanthan
Small non-functioning pancreatic NETs (pNETs) ≤2 cm can pose a management dilemma in terms of surveillance or resection. There is evidence to suggest that a surveillance approach can be considered since there are no significant radiological changes observed in lesions during long-term follow-up. However, other studies have suggested loco-regional spread can be present in ≤2 cm pNETs. The aim of this study was to characterise the prevalence of malignant features and identify any useful predictive variables in a surgically resected cohort of pNETs...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29101249/effect-of-thimerosal-on-thyroid-hormones-metabolism-in-rats
#15
Thiago U Pantaleão, Andrea C F Ferreira, Maria C S Santos, Álvaro S P Figueiredo, Ruy A N Louzada, Doris Rosenthal, Denise P Carvalho, Vânia M Corrêa da Costa
Mercury seems to exert an inhibitory effect on deiodinases, but there are few studies using Thimerosal (TM) as the mercury source. We aimed to elucidate the effect of TM on thyroid hormones peripheral metabolism. Adult Wistar female rats received 0.25 µg or 250 µg TM/100 g BW, IM, twice a week, for a month. We evaluated serum total T3 and T4, D1 activity using (125)I-rT3 as tracer, and D2 activity using (125)I-T4 NADPH oxidase activity was measured by Amplex-red/HRP method and mRNA levels by real time PCR...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29101248/increased-circulating-interleukin-8-in-patients-with-resistance-to-thyroid-hormone-receptor-%C3%AE
#16
Anne H van der Spek, Olga V Surovtseva, Saskia Aan, Anton T J Tool, Annemarie van de Geer, Korcan Demir, Anja L M van Gucht, A S Paul van Trotsenburg, Timo K van den Berg, Eric Fliers, Anita Boelen
Innate immune cells have recently been identified as novel thyroid hormone (TH) target cells in which intracellular TH levels appear to play an important functional role. The possible involvement of TH receptor alpha (TRα), which is the predominant TR in these cells, has not been studied to date. Studies in TRα(0/0) mice suggest a role for this receptor in innate immune function. The aim of this study was to determine whether TRα affects the human innate immune response. We assessed circulating interleukin-8 concentrations in a cohort of 8 patients with resistance to TH due to a mutation of TRα (RTHα) and compared these results to healthy controls...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29101247/evidence-of-earlier-thyroid-dysfunction-in-newly-diagnosed-oral-lichen-planus-patients-a-hint-for-endocrinologists
#17
Paolo G Arduino, Dora Karimi, Federico Tirone, Veronica Sciannameo, Fulvio Ricceri, Marco Cabras, Alessio Gambino, Davide Conrotto, Stefano Salzano, Mario Carbone, Roberto Broccoletti
The association between oral lichen planus (OLP) and hypothyroidism has been debated with conflicting results: some authors detected a statistically significant association between these two, while others did not confirm it. The aim of this study was to evaluate the thyroid status in patients with newly diagnosed OLP to test the null hypothesis that thyroid disease is not associated with an increased incidence of oral lesions, with a prospective case-control approach. A total of 549 patients have been evaluated, of whom 355 were female...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29097378/men1-gene-mutation-with-parathyroid-carcinoma-first-report-of-a-familial-case
#18
Luigia Cinque, Angelo Sparaneo, Antonio S Salcuni, Danilo de Martino, Claudia Battista, Francesco Logoluso, Orazio Palumbo, Roberto Cocchi, Evaristo Maiello, Paolo Graziano, Geoffrey N Hendy, David E C Cole, Alfredo Scillitani, Vito Guarnieri
BACKGROUND: The occurrence of parathyroid carcinoma in multiple endocrine neoplasia type I (MENI) is rare and the 15 cases of malignant parathyroid tumor reported so far have been associated with MENI in individuals and not with multiple members within a family. METHODS: We report on a 61-year-old male, operated for a 7.3 cm parathyroid carcinoma infiltrating the esophagus. In his brother, a 4.6 cm parathyroid carcinoma was diagnosed histologically, while in the daughter, neck ultrasonography revealed 2 extrathyroidal nodules, yet to be excised...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29042458/exenatide-modulates-tumor-endothelial-cell-interactions-in-human-ovarian-cancer-cells
#19
Agnieszka Kosowska, Enrique Gallego-Colon, Wojciech Garczorz, Agnieszka Kłych-Ratuszny, Mohammad Reza F Aghdam, Michał Woz Niak, Andrzej Witek, Agnieszka Wróblewska-Czech, Anna Cygal, Jerzy Wojnar, Tomasz Francuz
Diabetes and cancer are prevalent diseases whose incidence is increasing globally. Diabetic women have a moderate risk increase in ovarian cancer, suggested to be due to an interaction between these two disorders. Furthermore, patients manifesting both diseases have associated worse prognosis, reduced survival and shorter relapse-free survival. According to current recommendations, incretin drugs such as Exenatide, a synthetic analog of Exendin-4, and Liraglutide are used as therapy for the type 2 diabetes (T2D)...
November 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29042448/myo-inositol-effects-in-women-with-pcos-a-meta-analysis-of-randomized-controlled-trials
#20
Vittorio Unfer, Fabio Facchinetti, Beatrice Orrù, Barbara Giordani, John Nestler
Myo-inositol (MI) supplementation in women with polycystic ovary syndrome (PCOS) has been evaluated over the last years. Many hormonal and reproductive impairments associated with this disorder seem relieved by the supplement. The objective of the meta-analysis was to assess the effects of MI alone or combined with d-chiro-inositol (DCI) on the endocrine and metabolic abnormalities of women with PCOS. Literature was retrieved from selected databases, MEDLINE, EMBASE, PubMed and Research Gate (up to November 2016)...
November 2017: Endocrine Connections
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