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https://www.readbyqxmd.com/read/29351945/concurrent-endocrine-neoplasias-in-dogs-and-cats-a-retrospective-study-2004-2014
#1
Laura Beatrice, Felicitas Schär Boretti, Nadja S Sieber-Ruckstuhl, Claudia Mueller, Claudia Kümmerle-Fraune, Monika Hilbe, Paula Grest, Claudia E Reusch
Multiple endocrine neoplasia (MEN) is a well-known syndrome in human medicine, whereas only a few cases of concurrent endocrine neoplasias have been reported in dogs and cats. The aim of this study was to evaluate the prevalence of concurrent endocrine neoplasias in dogs and cats at our clinic, identify possible breed and sex predispositions and investigate similarities with MEN syndromes in humans. Postmortem reports of 951 dogs and 1155 cats that died or were euthanased at the Clinic for Small Animal Internal Medicine, University of Zurich, between 2004 and 2014 were reviewed, and animals with at least two concurrent endocrine neoplasias and/or hyperplasias were included...
January 19, 2018: Veterinary Record
https://www.readbyqxmd.com/read/29351476/human-endoc-%C3%AE-h1-%C3%AE-cells-form-pseudoislets-with-improved-glucose-sensitivity-and-enhanced-glp-1-signaling-in-the-presence-of-islet-derived-endothelial-cells
#2
Michael G Spelios, Lauren A Afinowicz, Regine C Tipon, Eitan M Akirav
Three-dimensional (3D) pseudoislets (PIs) can be used for the study of insulin-producing β-cells in free-floating islet-like structures similar to that of primary islets. Previously, we demonstrated the ability of islet-derived endothelial cells (iECs) to induce PIs using murine insulinomas, where PI formation enhanced insulin production and glucose responsiveness. In this report, we examined the ability of iECs to spontaneously induce the formation of free-floating 3D PIs using the EndoC-βH1 human β-cell line murine MS1 iEC line...
January 16, 2018: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29343517/early-infant-diet-and-islet-autoimmunity-in-the-teddy-study
#3
Ulla Uusitalo, Hye-Seung Lee, Carin Andrén Aronsson, Kendra Vehik, Jimin Yang, Sandra Hummel, Katherine Silvis, Åke Lernmark, Marian Rewers, William Hagopian, Jin-Xiong She, Olli Simell, Jorma Toppari, Anette-G Ziegler, Beena Akolkar, Jeffrey Krischer, Suvi M Virtanen, Jill M Norris
OBJECTIVE: To examine duration of breastfeeding and timing of complementary foods and risk of islet autoimmunity (IA). RESEARCH DESIGN AND METHODS: The TEDDY study prospectively follows 8,676 children with increased genetic risk of type 1 diabetes (T1D) in the U.S., Finland, Germany, and Sweden. This study included 7,563 children with at least 9 months of follow-up. Blood samples were collected every 3 months from birth to evaluate IA, defined as persistent, confirmed positive insulin autoantibodies (IAAs), glutamic acid decarboxylase, or insulinoma antigen-2...
January 17, 2018: Diabetes Care
https://www.readbyqxmd.com/read/29319794/an-observational-analysis-of-insulinoma-from-1-single-institution
#4
Zhixuan Zeng, Shuhong Hu, Shiying Shao
Background: Insulinoma is the commonest functioning pancreatic neuroendocrine tumor causing hyperinsulinemic hypoglycemia. This study is aimed to evaluate the clinical features, preoperative laboratory and imaging diagnosis, and pathologic findings of insulinoma. Methods: Data of the patients from 2001 to 2016 diagnosed as insulinoma in Tongji Hospital, China were retrospectively extracted and analyzed. Results: A total of 40 patients were diagnosed as insulinoma with a male/female ratio of 0...
January 8, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29309817/a-novel-synthetic-human-insulin-super-promoter-for-targeting-pdx-1-expressing-pancreatic-cancer
#5
Shi-He Liu, Juehua Yu, Robbi Sanchez, Xiaochen Liu, David Heidt, James Willey, John Nemunaitis, Francis Charles Brunicardi
Our previous studies have shown that a rat insulin promoter II fragment (RIP) was used to effectively target pancreatic adenocarcinoma (PDAC) and insulinoma that over-express pancreatic and duodenal homeobox-1 (PDX-1). To enhance the activity and specificity of the human insulin promoter, we engineered a synthetic human insulin super-promoter (SHIP). Reporter assay demonstrated that SHIP1 was the most powerful promoter among all of the SHIPs and had far greater activity than the endogenous human insulin promoters and RIP in PDAC expressing PDX-1...
January 5, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29309627/functional-defects-from-endocrine-disease-associated-mutations-in-hlxb9-and-its-interacting-partner-nono
#6
Sampada S Kharade, Vaishali I Parekh, Sunita K Agarwal
The insulin-secreting pancreatic neuroendocrine tumors (PNETs), insulinomas, characterized by increased pancreatic islet β-cell proliferation express the phosphorylated isoform of the β-cell differentiation factor HLXB9 that interacts with NONO/p54NRB, a survival factor. Interestingly, two different homozygous germline mutations in HLXB9, p.F248L and p.F272L, were reported in neonatal diabetes, a condition characterized by inadequate number of functional β-cells. Also, two somatic heterozygous NONO mutations were found in endocrine-related tumors, p...
January 4, 2018: Endocrinology
https://www.readbyqxmd.com/read/29304075/%C3%AE-cell-specific-overexpression-of-adiponectin-receptor-1-does-not-improve-diabetes-mellitus-in-akita-mice
#7
Jungmi Choi, Hatasu Kobayashi, Hiroko Okuda, Kouji H Harada, Midori Takeda, Hiroyuki Fujimoto, Shunsuke Yamane, Daisuke Tanaka, Shohab Youssefian, Nobuya Inagaki, Akio Koizumi
Adiponectin, a metabolically-active cytokine secreted from adipose tissue, is reported to have anti-apoptotic effects on β-cells as well as anti-hyperglycemic effects through adiponectin receptor signaling. However, the anti-apoptotic effects of adiponectin on β-cells have not been confirmed in established diabetic models, and the anti-hyperglycemic effects and their associated signal cascades remain controversial. To investigate the effects of adiponectin on β-cell protection and its down-stream signaling events, we have generated β-cell-specific rat insulin promoter (RIP)-AdipoR1 transgenic mice (AdipoR1 mice), in which the adiponectin receptor, AdipoR1, is overexpressed in β-cells in a manner synchronous with insulin demand...
2018: PloS One
https://www.readbyqxmd.com/read/29286118/amelioration-of-streptozotocin%C3%A2-induced-pancreatic-%C3%AE-cell-damage-by-morin-involvement-of-the-ampk%C3%A2-foxo3%C3%A2-catalase-signaling-pathway
#8
Ning Wang, Jiahui Zhang, Mengting Qin, Wenjing Yi, Shuang Yu, Yi Chen, Jing Guan, Rui Zhang
Pancreatic β cells are sensitive to oxidative stress, which is one of the predominant causes of cell damage and the emergence of diabetes. The identification of effective therapeutic strategies to protect pancreatic cells from oxidative stress has increased interest in the screening of antioxidants from natural products. The present study aimed to investigate the protective effects of morin against streptozotocin (STZ)‑induced cell damage in a rat insulinoma cell line (RINm5F pancreatic β cells) and to identify the underlying mechanisms...
December 29, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29284659/a-targeted-rnai-screen-identifies-endocytic-trafficking-factors-that-control-glp-1-receptor-signaling-in-pancreatic-beta-cells
#9
Teresa Buenaventura, Nisha Kanda, Phoebe C Douzenis, Ben Jones, Stephen R Bloom, Pauline Chabosseau, Ivan R Corrêa, Domenico Bosco, Lorenzo Piemonti, Piero Marchetti, Paul R Johnson, Am James Shapiro, Guy A Rutter, Alejandra Tomas
The GLP-1 receptor (GLP-1R) is a key target for type 2 diabetes (T2D) treatment. Since endocytic trafficking of agonist-bound receptors is one of the most important routes for regulation of receptor signaling, a better understanding of this process may facilitate the development of new T2D therapeutic strategies. Here, we have screened 29 proteins with known functions in G protein-coupled receptor trafficking for their role in GLP-1R potentiation of insulin secretion in pancreatic beta cells. We identify five (clathrin, dynamin1, AP2, SNX27 and SNX1) that increase and four (HIP1, HIP14, GASP-1 and Nedd4) that decrease insulin secretion from murine insulinoma MIN6B1 cells in response to the GLP-1 analogue exendin-4...
December 28, 2017: Diabetes
https://www.readbyqxmd.com/read/29278702/hypoxia-potentiates-lps-induced-inflammatory-response-and-increases-cell-death-by-promoting-nlrp3-inflammasome-activation-in-pancreatic-%C3%AE-cells
#10
Cheng Chen, Xiaoqian Ma, Cejun Yang, Wei Nie, Juan Zhang, Hongde Li, Pengfei Rong, Shounan Yi, Wei Wang
Hypoxia and islet inflammation are involved in β-cell failure in type 2 diabetes (T2D). Elevated plasma LPS levels have been verified in patients with T2D, and hypoxia occurs in islets of diabetic mice. Activation of inflammasomes in ischemic or hypoxic conditions was identified in various tissues. Here, we investigated whether hypoxia activates the inflammasome in β cells and the possible mechanisms involved. In mouse insulinoma cell line 6 (MIN6), hypoxia (1% O2) primes the NLRP3 inflammasome along with NF-κB signaling activation...
December 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29277794/clinical-value-of-18f-fdopa-pet-ct-with-contrast-enhancement-and-without-carbidopa-premedication-in-patients-with-insulinoma
#11
Thomas Selim Nakuz, Erik Berger, Karem El-Rabadi, Wolfgang Wadsak, Alexander Haug, Marcus Hacker, Georgios Karanikas
AIM: We evaluated the clinical usefulness of 6-[18F]fluoro-3,4-dihydroxy-L-phenylalanine(18F-FDOPA)-positron-emission tomography (PET)/computed tomography (CT) in insulinoma detection with contrast enhancement, early acquisition time, and no carbidopa premedication. PATIENTS AND METHODS: Twenty-six patients diagnosed with hyperinsulinemic hypoglycemia underwent an 18F-FDOPA PET/CT examination. Patients without carbidopa premedication and contrast-enhanced CT were included...
January 2018: Anticancer Research
https://www.readbyqxmd.com/read/29277262/pancreatectomies-for-pancreatic-neoplasms-in-pediatric-and-adolescent-age-a-single-institution-experience
#12
Chiara Scandavini, Roberto Valente, Elena Rangelova, Ralf Segersvärd, Urban Arnelo, Johan Permert, Pär-Johan Svensson, Jakob Stenman, Marco Del Chiaro
BACKGROUND: There are very few data in the current literature regarding the short- and long-term outcome of surgery for pediatric pancreatic tumors (PPT). No data are available on the impact of pancreatic surgery on the children's growth. METHODS: This is a retrospective cohort study on a consecutive series of pediatric/adolescent patients who underwent pediatric surgery at Karolinska University Hospital from January 2005 to July 2017. RESULTS: Overall 14 pancreatic operations were performed in 13 patients...
December 19, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/29260252/-functional-diagnostics-in-endocrinology
#13
REVIEW
C J Auernhammer, M Reincke
When investigating many endocrinological diseases, basal laboratory parameters are not sufficient to distinguish between physiological and pathological hormone secretion. Functional diagnostics plays a decisive role in this context. Stimulation and suppression tests are used depending on whether under- or over-function needs to be diagnosed. This review article discusses selected functional tests, each of which plays an important role in current guidelines. Indications and test principles, including their performance, reliability, and limitations, are discussed...
December 19, 2017: Der Internist
https://www.readbyqxmd.com/read/29259758/sar-studies-of-indole-5-propanoic-acid-derivatives-to-develop-novel-gpr40-agonists
#14
Dong-Oh Yoon, Xiaodi Zhao, Dohyun Son, Jung Tae Han, Jaesook Yun, Dongyun Shin, Hyun-Ju Park
G-protein coupled receptor 40 (GPR40) has been considered to be an attractive drug target for the treatment of type 2 diabetes because of its role in free fatty acids-mediated enhancement of glucose-stimulated insulin secretion (GSIS) from pancreatic β-cells. A series of indole-5-propanoic acid compounds were synthesized, and their GPR40 agonistic activities were evaluated by nuclear factor of activated T-cells reporter assay and GSIS assay in the MIN-6 insulinoma cells. Three compounds, 8h (EC50 = 58.6 nM), 8i (EC50 = 37...
December 14, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29251115/nano-encapsulation-of-bilirubin-in-pluronic-f127-chitosan-improves-uptake-in-%C3%AE-cells-and-increases-islet-viability-and-function-after-hypoxic-stress
#15
Bronwyn Fullagar, Wei Rao, Chen Gilor, Feng Xu, Xiaoming He, Christopher A Adin
Pancreatic islet transplantation is the only curative, noninvasive treatment for type 1 diabetes mellitus; however, high rates of cell death in the immediate postimplantation period have limited the success of this procedure. Bilirubin, an endogenous antioxidant, can improve the survival of murine pancreatic allografts during hypoxic stress but has poor solubility in aqueous solutions. We hypothesized that nano-encapsulation of bilirubin in pluronic 127-chitosan nanoparticle bilirubin (nBR) would improve uptake by murine pancreatic islet cells and improve their viability following hypoxic stress...
October 2017: Cell Transplantation
https://www.readbyqxmd.com/read/29250314/a-case-of-long-survival-insulinoma-with-multiple-neuroendocline-tumour-type-1-controlled-by-multimodal-therapy
#16
Masahiro Shiihara, Wataru Izumo, Ryota Higuchi, Takehisa Yazawa, Shuichiro Uemura, Toru Furukawa, Masakazu Yamamoto
Insulinomas with multiple neuroendocrine tumour type 1 (MEN1) sometimes have metachronous or recurrent tumours. However, the treatment for these tumours is controversial, and published reports regarding multimodal therapy for insulinomas are limited. We report a 73-year-old woman with recurrent insulinoma with MEN1 successfully controlled by multimodal therapy. She had several complications, and poor performance status. Her hypoglycaemia did not improve after 6-month octreotide LAR; as such, she underwent enucleation of the pancreatic tumour...
December 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29244751/spirulina-extract-enhanced-a-protective-effect-in-type-1-diabetes-by-anti-apoptosis-and-anti-ros-production
#17
Jiyeong Lee, Arum Park, Mi Jeong Kim, Hee-Joung Lim, Young-Ah Rha, Hee-Gyoo Kang
Interest in the nutritional value and pharmacological activities of blue-green algae has gradually increased. Spirulina extracts show protective effects against apoptosis and inflammatory damage in various cell types. Here, we investigated the protective effects of extracts from Spirulina maxima in a cytokine-mediated type 1 diabetes model in vitro and in streptozotocin-induced diabetic Wistar rats in vivo. Interleukin-1β and interferon-gamma induced substantial cytotoxicity to RINm5F rat insulinoma cells, increasing nitric oxide (NO) production, nuclear factor-kappa B (NF-κB) activity, the expression of endoplasmic reticulum (ER) stress genes, and activation of mitogen-activated protein kinases and key genes related apoptosis...
December 15, 2017: Nutrients
https://www.readbyqxmd.com/read/29241949/a-severe-but-reversible-reduction-in-insulin-sensitivity-is-observed-in-patients-with-insulinoma
#18
Raluca Maria Furnica, Laure Istasse, Dominique Maiter
BACKGROUND: Hypoglycemic manifestations are highly variable in patients with an insulinoma and largely independent of tumour size and severity of insulin hypersecretion. OBJECTIVES: We investigated the clinical, biological and tumoral characteristics of insulinomas in a large monocentric series of patients and we evaluated their insulin sensitivity before and after successful pancreatic surgery. PATIENTS AND METHODS: This was a retrospective analysis of 40 patients treated for an insulinoma between 1982 and 2012 in our academic hospital...
December 11, 2017: Annales D'endocrinologie
https://www.readbyqxmd.com/read/29240812/effects-of-vaspin-on-pancreatic-%C3%AE-cell-secretion-via-pi3k-akt-and-nf-%C3%AE%C2%BAb-signaling-pathways
#19
Shiwei Liu, Xin Li, Yaru Wu, Ruixue Duan, Jiaxin Zhang, Fang Du, Qi Zhang, Yuanbin Li, Naishi Li
Vaspin (visceral adipose tissue-derived serine protease inhibitor) is a recently discovered adipokine that has been implicated in diabetes mellitus and other metabolic disorders. However, the effects of vaspin on pancreatic β cell function and related mechanisms are not fully understood. Thus, the present study was performed to investigate the effects of vaspin on pancreatic β cell function and the potential underlying mechanisms. Both in vitro (rat insulinoma cells, INS-1) and in vivo (high fat diet fed rats) experiments were conducted...
2017: PloS One
https://www.readbyqxmd.com/read/29226587/cellular-models-for-beta-cell-function-and-diabetes-gene-therapy
#20
REVIEW
Alastair D Green, Srividya Vasu, Peter R Flatt
Diabetes is characterised by the destruction and/or relative dysfunction of insulin secreting beta-cells in the pancreatic islets of Langerhans. Consequently, considerable effort has been made to understand the physiological processes governing insulin production and secretion in these cells, and to elucidate the mechanisms involved in their deterioration in the pathogenesis of diabetes. To date, considerable research has exploited clonal beta-cell lines derived from rodent insulinomas. Such cell-lines have proven to be a great asset in diabetes research, in vitro drug testing, and studies of beta-cell physiology; and provide a sustainable, and in many cases, more practical alternative to the use of animals or primary tissue...
December 11, 2017: Acta Physiologica
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