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https://www.readbyqxmd.com/read/28735463/impact-of-pioglitazone-on-bone-mineral-density-and-bone-marrow-fat-content
#1
L M Pop, I Lingvay, Q Yuan, X Li, B Adams-Huet, N M Maalouf
Pioglitazone use is associated with an increased risk of fractures. In this randomized, placebo-controlled study, pioglitazone use for 12 months was associated with a significant increase in bone marrow fat content at the femoral neck, accompanied by a significant decrease in total hip bone mineral density. The change in bone marrow fat with pioglitazone use was predominantly observed in female vs. male participants. INTRODUCTION: Use of the insulin sensitizer pioglitazone is associated with greater fracture incidence, although the underlying mechanisms are incompletely understood...
July 22, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28710249/amyloid-precursor-protein-in-pancreatic-islets
#2
Joshua Kulas, Kendra Puig, Colin K Combs
The amyloid precursor protein (APP) has been extensively investigated for its role in the production of amyloid beta (Aβ), a plaque forming peptide in Alzheimer's disease (AD). Epidemiological evidence suggests type 2 diabetes is a risk factor for AD. The pancreas is an essential regulator of blood glucose levels through the secretion of the hormones insulin and glucagon. Pancreatic dysfunction is a well characterized consequence of type 1 and type 2 diabetes. In this study we have examined the expression and processing of pancreatic APP to test the hypothesis that APP may play a role in pancreatic function and the pathophysiology of diabetes...
July 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28699200/ultrasonographic-features-of-insulinoma-in-six-ferrets
#3
Ruey-Shyuan Wu, Yi-Jing Liu, Che-Chu Chu, Hock Gan Heng, Min-Yuan Chia, Hsien-Chi Wang, Kuan-Sheng Chen
Insulinoma is a functional, insulin-secreting tumor, arising from the beta islet cells of the pancreas. It is one of the most common neoplasms in ferrets and has been associated with clinical signs of hypoglycemia, such as ptyalism, pawing at the mouth, seizures, lethargy, and coma. The ultrasonographic features of insulinoma in ferrets have not been previously reported. The purpose of this retrospective case series study was to describe the ultrasonographic features of confirmed insulinoma in a group of ferrets...
July 11, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28689026/venom-peptides-as-pharmacological-tools-and-therapeutics-for-diabetes
#4
REVIEW
Samuel D Robinson, Helena Safavi-Hemami
Diabetes mellitus is a chronic disease caused by a deficiency in production of insulin by the beta cells of the pancreas (type 1 diabetes, T1D), or by partial deficiency of insulin production and the ineffectiveness of the insulin produced (type 2 diabetes, T2D). Animal venoms are a unique source of compounds targeting ion channels and receptors in the nervous and cardiovascular systems. In recent years, several venom peptides have also emerged as pharmacological tools and therapeutics for T1D and T2D. Some of these peptides act directly as mimics of endogenous metabolic hormones while others act on ion channels expressed in pancreatic beta cells...
July 5, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28670537/the-serological-and-biochemical-markers-of-adrenal-cortex-and-endocrine-pancreas-dysfunction-in-patients-with-hashimoto-s-thyroiditis-a-hospital-based-pilot-study
#5
Jaya Prakash Sahoo, Jayakumar Selviambigapathy, Sadishkumar Kamalanathan, V S Negi, M G Sridhar, Sitanshu Sekhar Kar, Muthupillai Vivekanandan
BACKGROUND: The prevalence of both islet cell and adrenal autoimmunity among Asian Indian hypothyroidism patients with Hashimoto's thyroiditis (HT) is lacking in literature. OBJECTIVES: The objective of this study was to assess the proportion of Addison's disease (AD) and type 1 diabetes mellitus (T1DM) in patients with HT. MATERIALS AND METHODS: The patients with hypothyroidism due to HT were included in this study over 2 years. Primary hypothyroidism was defined as high serum thyroid-stimulating hormone (>5...
July 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28670511/radioactive-iodine-therapy-and-glucose-tolerance
#6
REVIEW
Roghaieh Samadi, Babak Shafiei, Fereidoun Azizi, Asghar Ghasemi
Radioactive iodine therapy is commonly used as an adjuvant therapy in follicular and papillary thyroid carcinoma (PTC) and in the treatment of Graves' disease (GD). The basis of this therapy is the accumulation of radioactive iodine by the sodium-iodide symporter (NIS) in the thyroid gland. Expression of NIS by extrathyroidal tissues such as islets of pancreas has been reported. Radioactive iodine uptake by pancreatic beta-cells can potentially damage these cells. In this study, we discuss the possible associations between radioactive iodine and glucose intolerance...
July 2017: Cell Journal
https://www.readbyqxmd.com/read/28655312/transplantation-of-human-fetal-pancreatic-progenitor-cells-ameliorates-renal-injury-in-streptozotocin-induced-diabetic-nephropathy
#7
Yongwei Jiang, Wenjian Zhang, Shiqing Xu, Hua Lin, Weiguo Sui, Honglin Liu, Liang Peng, Qing Fang, Li Chen, Jinning Lou
BACKGROUND: Diabetic nephropathy (DN) is a severe complication of diabetes mellitus (DM). Pancreas or islet transplantation has been reported to prevent the development of DN lesions and ameliorate or reverse existing glomerular lesions in animal models. Shortage of pancreas donor is a severe problem. Islets derived from stem cells may offer a potential solution to this problem. OBJECTIVE: To evaluate the effect of stem cell-derived islet transplantation on DN in a rat model of streptozotocin-induced DM...
June 27, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28649475/solid-pseudopapillary-tumor-of-the-pancreas-an-unusual-cause-of-abdominal-pain
#8
Talal El Imad, Fady G Haddad, Mayurathan Kesavan, Liliane Deeb, Sherif Andrawes
Solid-pseudopapillary neoplasm (SPN) of the pancreas is a rare tumor that accounts for less than one percent of pancreatic tumors. The diagnosis could be challenging as SPN tend to manifest with nonspecific abdominal symptoms, variable radiological features, and inconsistent morphology. The cellular origin of SPN is unclear and might involve ductal, acinar and endocrine stem cells.  We report a rare case of a 27-year-old female who presented with intermittent abdominal pain for two years, associated with a decrease in appetite...
May 16, 2017: Curēus
https://www.readbyqxmd.com/read/28642969/diverse-metabolic-effects-of-o-glcnacylation-in-the-pancreas-but-limited-effects-in-insulin-sensitive-organs-in-mice
#9
Shogo Ida, Katsutaro Morino, Osamu Sekine, Natsuko Ohashi, Shinji Kume, Tokuhiro Chano, Kanako Iwasaki, Norio Harada, Nobuya Inagaki, Satoshi Ugi, Hiroshi Maegawa
AIMS/HYPOTHESIS: O-GlcNAcylation is characterised by the addition of N-acetylglucosamine to various proteins by O-GlcNAc transferase (OGT) and serves in sensing intracellular nutrients by modulating various cellular processes. Although it has been speculated that O-GlcNAcylation is associated with glucose metabolism, its exact role in whole body glucose metabolism has not been fully elucidated. Here, we investigated whether loss of O-GlcNAcylation globally and in specific organs affected glucose metabolism in mammals under physiological conditions...
June 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28633420/pancreas-fat-and-beta-cell-mass-in-humans-with-and-without-diabetes-an-analysis-in-the-japanese-population
#10
Rie Murakami, Yoshifumi Saisho, Yuusuke Watanabe, Jun Inaishi, Tami Tsuchiya, Kinsei Kou, Seiji Sato, Minoru Kitago, Yuko Kitagawa, Taketo Yamada, Hiroshi Itoh
Context: The mechanisms by which beta cell mass is reduced in patients with type 2 diabetes (T2DM) remain unclear. It has been postulated that ectopic fat deposits in the pancreas induce beta cell apoptosis, leading to the development of diabetes. Objective: The aim of this study was to clarify the effects of intra-pancreatic fat on beta and alpha cell mass in humans with and without diabetes. Design, Subjects and Methods: Using our tissue database, pancreas sections of 72 Japanese non-diabetic (NDM) autopsy cases and 50 diabetic (DM) and 49 age- and BMI-matched NDM patients who underwent pancreatic surgery were analyzed...
June 14, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28632820/the-nexus-of-stem-cell-derived-beta-cells-and-genome-engineering
#11
Sara D Sackett, Aida Rodriguez, Jon S Odorico
Diabetes, type 1 and type 2 (T1D and T2D), are diseases of epidemic proportions, which are complicated and defined by genetics, epigenetics, environment, and lifestyle choices. Current therapies consist of whole pancreas or islet transplantation. However, these approaches require life-time immunosuppression, and are compounded by the paucity of available donors. Pluripotent stem cells have advanced research in the fields of stem cell biology, drug development, disease modeling, and regenerative medicine, and importantly allows for the interrogation of therapeutic interventions...
2017: Review of Diabetic Studies: RDS
https://www.readbyqxmd.com/read/28631500/pancreatic-%C3%AE-cell-survival-and-proliferation-are-promoted-by-protein-kinase-g-type-i%C3%AE-and-downstream-regulation-of-akt-foxo1
#12
Janica C Wong, Van Vo, Priyatham Gorjala, Ronald R Fiscus
Early studies showed nitric oxide as a pro-inflammatory-cytokine-induced toxin involved in pancreatic β-cell destruction during pathogenesis of type-1 diabetes. However, nitric oxide has both cytotoxic and cytoprotective effects on mammalian cells, depending on concentration and micro-environmental surroundings. Our studies have shown that low/physiological-level nitric oxide selectively activates protein kinase G type Iα isoform, promoting cytoprotective/pro-cell-survival effects in many cell types. In bone marrow-derived stromal/mesenchymal stem cells, protein kinase G type Iα mediates autocrine effects of nitric oxide and atrial natriuretic peptide, promoting DNA-synthesis/proliferation and cell survival...
June 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28625491/insulinotropic-action-of-2-4-dinitroanilino-benzoic-acid-through-the-attenuation-of-pancreatic-beta-cell-lesions-in-diabetic-rats
#13
Humera Jahan, M Iqbal Choudhary, Mehwish Manzoor, Khalid Mohammad Khan, Shahnaz Perveen, Atta-Ur-Rahman
Beta cell destruction plays a key role in the pathogenesis of type 1 diabetes mellitus. It has also been argued that beta-cell mass is compromised in some cases of type 2 diabetes, although this is still debated. Currently, the failure of oral antidiabetic insulin secretagogue drugs to properly manage type 2 diabetes demands novel approaches for the treatment of this condition. The aim of the present study was to investigate the in vitro and in vivo antidiabetic effect in STZ-induced diabetic rats, and maximum tolerated dose (MTD) safety of novel anthranilic acid derivative, 2, 4-dinitroanilino-benzoic acid (1)...
June 15, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28617859/co-localization-of-acinar-markers-and-insulin-in-pancreatic-cells-of-subjects-with-type-2-diabetes
#14
Matilde Masini, Lorella Marselli, Eddy Himpe, Luisa Martino, Marco Bugliani, Mara Suleiman, Ugo Boggi, Franco Filipponi, Margherita Occhipinti, Luc Bouwens, Vincenzo De Tata, Piero Marchetti
To search for clues suggesting that beta cells may generate by transdifferentiation in humans, we assessed the presence of cells double positive for exocrine (amylase, carboxypeptidase A) and endocrine (insulin) markers in the pancreas of non-diabetic individuals (ND) and patients with type 2 diabetes (T2D). Samples from twelve ND and twelve matched T2D multiorgan donors were studied by electron microscopy, including amylase and insulin immunogold labeling; carboxypeptidase A immunofluorescence light microscopy assessment was also performed...
2017: PloS One
https://www.readbyqxmd.com/read/28585204/insulin-resistance-obesity-and-lipotoxicity
#15
Dilek Yazıcı, Havva Sezer
Lipotoxicity , originally used to describe the destructive effects of excess fat accumulation on glucose metabolism, causes functional impairments in several metabolic pathways, both in adipose tissue and peripheral organs, like liver, heart, pancreas and muscle. Lipotoxicity has roles in insulin resistance and pancreatic beta cell dysfunction. Increased circulating levels of lipids and the metabolic alterations in fatty acid utilization and intracellular signaling, have been related to insulin resistance in muscle and liver...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28580283/foxa2-and-pdx1-cooperatively-regulate-postnatal-maturation-of-pancreatic-%C3%AE-cells
#16
Aimée Bastidas-Ponce, Sara S Roscioni, Ingo Burtscher, Erik Bader, Michael Sterr, Mostafa Bakhti, Heiko Lickert
OBJECTIVE: The transcription factors (TF) Foxa2 and Pdx1 are key regulators of beta-cell (β-cell) development and function. Mutations of these TFs or their respective cis-regulatory consensus binding sites have been linked to maturity diabetes of the young (MODY), pancreas agenesis, or diabetes susceptibility in human. Although Foxa2 has been shown to directly regulate Pdx1 expression during mouse embryonic development, the impact of this gene regulatory interaction on postnatal β-cell maturation remains obscure...
June 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28571494/cardiovascular-pleiotropic-effects-of-statins-and-new-onset-diabetes-is-there-a-common-link-do-we-need-to-evaluate-the-role-of-katp-channels
#17
REVIEW
Devindra Sehra, Sudhish Sehra, Shiv Tej Sehra
Statins are considered the main stay of treatment in the prevention of cardio-vascular morbidity and mortality. They have multiple pleiotropic effects, like stabilization of atherosclerotic plaques, inhibition of platelet aggregation, and vascular smooth muscle proliferation; in addition to their lipid lowering action. Statins manifest these pleiotropic effects because they activate KATP channels in the cardiac and vascular tissue. Simultaneous activation of the KATP channels by statins in β cells of pancreas may inhibit insulin release which may lead to diabetes...
July 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28567298/recurrent-insulinoma-in-a-10-year-old-boy-with-down-s-syndrome
#18
Noman Ahmad, Abdulmonem Mohammed Almutawa, Mohamed Ziyad Abubacker, Hossam Ahmed Elzeftawy, Osama Abdullah Bawazir
An insulinoma is a rare tumour with an incidence of four cases per million per year in adults. The incidence in children is not established. There is limited literature available in children with insulinoma, and only one case is reported in association with Down's syndrome in adults. Insulinoma diagnosis is frequently missed in adults as well as in children. The Whipple triad is the most striking feature although it has limited application in young children. Hypoglycaemia with elevated insulin, C-peptide and absent ketones is highly suggestive of hyperinsulinism...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28551699/the-role-of-somatostatin-in-glp-1-induced-inhibition-of-glucagon-secretion-in-mice
#19
Anne Ørgaard, Jens J Holst
AIMS/HYPOTHESIS: Glucagon-like peptide-1 (GLP-1) receptor agonists are currently used for the treatment of type 2 diabetes. Their main mechanism of action is enhancement of glucose-induced insulin secretion (from increased beta cell glucose sensitivity) and inhibition of glucagon secretion. The latter has been demonstrated to account for about half of their blood glucose-lowering activity. Whereas the effect of GLP-1 on insulin secretion is clearly dependent on ambient glucose concentrations and has been described in detail, the mechanism responsible for the inhibitory effect of GLP-1 on glucagon secretion is heavily debated...
May 27, 2017: Diabetologia
https://www.readbyqxmd.com/read/28535085/characterization-of-an-encapsulated-insulin-secreting-human-pancreatic-beta-cell-line-in-a-modular-microfluidic-device
#20
Argia Acarregui, Jesús Ciriza, Laura Saenz Del Burgo, Haritz Gurruchaga Iribar, José Yeste, Xavi Illa, Gorka Orive, Rosa M Hernández, Rosa Villa, Jose Luis Pedraz
Type I diabetes mellitus is characterised by the destruction of the insulin producing beta cells within the pancreas by the immune system. After the success of Edmonton protocol, islet transplantation has shown to be a promising therapy, but with the Achilles´ heel of the need of using immunosuppressive drugs. Currently, cell encapsulation technology represents a real alternative to protect transplanted islets from the host´s immune attack. Although preliminary in vitro studies with encapsulated cells have been traditionally performed under static conditions in terms of viability and efficiency, these static cultures do not represent a close approach to in vivo environments...
June 6, 2017: Journal of Drug Targeting
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