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https://www.readbyqxmd.com/read/29793180/insulin-is-a-potential-antioxidant-for-diabetes-associated-cognitive-decline-via-regulating-nrf2-dependent-antioxidant-enzymes
#1
Ying Song, Wei Ding, Yun Bei, Yan Xiao, Hai-Da Tong, Li-Bo Wang, Li-Yao Ai
PURPOSE: To investigate the neuroprotective effects of insulin on diabetic encephalopathy and its mechanism. EXPERIMENTAL AND APPROACH: The diabetic model was established by injection of streptozotocin. Behavior examinations were conducted by the Morris water maze. Histopathological alterations were detected by HE staining. ROS, CAT levels and SOD activity were measured using a microplate reader. In vitro, the viability of wild type and knock-down PC12 cells was detected by MTT assay, the morphology of cells was monitored under a microscope...
May 21, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29793094/effects-of-chronic-antipsychotic-drug-exposure-on-the-expression-of-translocator-protein-and-inflammatory-markers-in-rat-adipose-tissue
#2
Anita Calevro, Marie-Caroline Cotel, Sridhar Natesan, Michel Modo, Anthony C Vernon, Valeria Mondelli
The precise effect of antipsychotic drugs on either central or peripheral inflammation remains unclear. An important issue in this debate is to what extent the known peripheral metabolic effects of antipsychotics, including increased adiposity, may contribute to increased inflammation. Adipose tissue is known to contribute to the development of systemic inflammation, which can eventually lead to insulin resistance and metabolic dysregulation. As a first step to address this question, we evaluated whether chronic exposure to clinically comparable doses of haloperidol or olanzapine resulted in the immune activation of rat adipose tissue...
May 16, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29792552/immobilization-rapidly-induces-thioredoxin-interacting-protein-txnip-gene-expression-together-with-insulin-resistance-in-rat-skeletal-muscle
#3
Emi Kawamoto, Keigo Tamakoshi, Song-Gyu Ra, Hiroyuki Masuda, Kentaro Kawanaka
Acute short-duration of disuse induces the development of insulin resistance for glucose uptake in rodent skeletal muscle. Since thioredoxin-interacting protein (TXNIP) has been implicated in the downregulation of insulin signaling and glucose uptake, we examined the possibility that muscle disuse rapidly induces insulin resistance via increased TXNIP mRNA and protein expression. Male Wistar rats were subjected to unilateral 6-hr hindlimb immobilization by plaster cast. At the end of this period, the soleus muscles from both immobilized and contralateral non-immobilized hindlimbs were excised and examined...
May 24, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29792541/interaction-of-low-frequency-external-electric-fields-and-pancreatic-%C3%AE-cell-a-mathematical-modeling-approach-to-identify-the-influence-of-excitation-parameters
#4
Sajjad Farashi, Pezhman Sasanpour, Hashem Rafii-Tabar
Purpose-Although the effect of electromagnetic fields on biological systems has attracted attraction in recent years, there has not been any conclusive result concerning the effects of interaction and the underlying mechanisms involved. Besides the complexity of biological systems, the parameters of the applied electromagnetic field have not been estimated in most of the experiments. Material and Method-In this study, we have used computational approach in order to find the excitation parameters of an external electric field which produces sensible effects in the function of insulin secretory machinery, whose failure triggers the diabetes disease...
May 24, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29792531/the-expression-of-lysophosphatidic-acid-receptor-5-is-necessary-for-the-regulation-of-intestinal-na-h-exchanger-3-by-lysophosphatidic-acid-in-vivo
#5
Kayte A Jenkin, Peijian He, C Chris Yun
Lysophosphatidic acid (LPA) is a bioactive lipid molecule, which regulates a broad range of pathophysiological processes. Recent studies have demonstrated that LPA modulates electrolyte flux in the intestine and its potential as an anti-diarrheal agent has been suggested. Of six LPA receptors, LPA5 is highly expressed in the intestine. Recent studies by our group have demonstrated activation of Na+ /H+ exchanger 3 (NHE3) by LPA5 . However, much of what has been elucidated was achieved using colonic cell lines that were transfected to express LPA5 ...
May 24, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29792527/enteric-neural-stem-cells-expressing-insulin-like-growth-factor-1-a-novel-cellular-therapy-for-hirschsprung-s-disease-in-mouse-model
#6
Wei Liu, Lijuan Zhang, Rongde Wu
Transplanting enteric neural stem cells (ENSCs) is an innovative approach for replacing enteric neurons in Hirschsprung's disease (HSCR). However, posttransplantation cell survival and differentiation limit efficacy. We aimed to investigate whether transplantation of ENSCs engineered with insulin-like growth factor 1 (IGF-1) could improve survival and differentiation of the engrafted cells and promote functional recovery of the aganglionic colon. ENSCs were isolated from the intestine of neonatal mice and genetically modified to express IGF-1...
May 24, 2018: DNA and Cell Biology
https://www.readbyqxmd.com/read/29792387/resveratrol-prevents-high-calorie-diet-induced-learning-and-memory-dysfunction-in-juvenile-c57bl-6j-mice
#7
Bao-Lei Xu, Hui Zhang, Li-Na Ma, Wen Dong, Zhi-Wei Zhao, Jing-Shuang Zhang, Yu-Lan Wang, Xu Zhang, Rong Wang
OBJECTIVE: Because resveratrol (RSV) has been shown to improve learning and memory, so we investigated the potential benefit of RSV on learning and memory deficits in juvenile mice fed with a HC diet and explored the molecular mechanisms underlying this process. METHODS: Six-week-old C57BL/6J mice were divided into three different diet groups: control, HC diet, and HC + RSV diet. Serum insulin and insulin-like growth factor 1 (IGF-1) levels were measured using enzyme-linked immunosorbent assays...
May 24, 2018: Neurological Research
https://www.readbyqxmd.com/read/29792143/recent-updates-on-novel-approaches-in-insulin-drug-delivery-a-review-of-challenges-and-pharmaceutical-implications
#8
Manisha Pandey, Hira Choudhury, Cheah Xiao Yi, Chen Wei Mun, Goh Khang Ping, Guee Xin Rou, Bhalqish Jeet Kaur A/P Ambar Jeet Singh, Angel Ng Ann Jhee, Lee Kai Chin, Prashant Kesharwani, Bapi Gorain, Zahid Hussain
Diabetes mellitus, a metabolic disorder of glucose metabolism, is mainly associated with insulin resistance to the body cells, or impaired production of insulin by the pancreatic β-cells. Insulin is mainly required to regulate glucose metabolism in type 1 diabetes mellitus patients; however, many patients with type 2 diabetes mellitus also require insulin, especially when their condition cannot be controlled solely by oral hypoglycemic agents. Hence, major researches are ongoing attempting to improve the delivery of insulin in order to make it more convenient to patients who experience side effects from the conventional treatment procedure or non-adherence to insulin regimen due to multiple comorbid conditions...
May 22, 2018: Current Drug Targets
https://www.readbyqxmd.com/read/29792066/capabilities-of-next-generation-patch-pump-improved-precision-instant-occlusion-detection-and-dual-hormone-therapy
#9
Forrest W Payne, Bradley Ledden, Greg Lamps
Insulin pumps allow patients to attain better blood glucose control with more lifestyle flexibility. Their size and cost, however, limit their usefulness. Current CSII pumps are bulky, intrusive, and expensive. SFC Fluidics is addressing these problems by developing a new type of wearable patch pump based on the patented electro-chemiosmotic (ECO) microfluidic pumping technology. This nonmechanical pumping technology allows accurate and precise delivery of very small amounts of insulin and/or other drugs, including concentrated insulin...
May 1, 2018: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/29792023/fern-9-11-ene-2%C3%AE-3%C3%AE-diol-action-on-insulin-secretion-in-hyperglycemic-conditions
#10
Allisson Jhonatan Gomes Castro, Luisa Helena Cazarolli, Gabrielle Da Luz, Delsi Altenhofen, Hemily Batista Da Silva, Francieli Kanumfre Carvalho, Moacir Geraldo Pizzolatti, Fátima Rmb Silva
The objective of this study was to investigate the effect and the mechanism of action of fernenediol as insulin secretagogue. Wistar rats were treated with 0.1; 1 and 10 mg/kg fernenediol and then induced hyperglycemia by oral glucose. The glycaemia, insulin, LDH, calcium and hepatic glycogen were analyzed. Considering the intestine and pancreas as targets for the triterpene action, the duodenum was used to verify the influence of fernenediol on intestinal glycosidases. Additionally, pancreatic islets were used for studies of 14 C-deoxyglucose uptake and influx of 45 Ca2+ in hyperglycemic medium with/without fernenediol in the presence/absence of an inhibitor/activator of KATP channels, glibenclamide, diazoxide, nifedipine, calcium chelator (BAPTA- AM) and H-89 and ST the inhibitors of the PKA and PKC enzymes...
May 24, 2018: Biochemistry
https://www.readbyqxmd.com/read/29791782/obesity-leads-to-impairments-in-the-morphology-and-organization-of-human-skeletal-muscle-lipid-droplets-and-mitochondrial-networks-which-are-resolved-with-gastric-bypass-surgery-induced-improvements-in-insulin-sensitivity
#11
Marianne D Kristensen, Signe M Petersen, Kjestine E Møller, Michael T Lund, Merethe Hansen, Christina N Hansen, Julie Courraud, Jørn W Helge, Flemming Dela, Clara Prats
AIMS: Skeletal muscle lipid stores and mitochondrial function have been appointed as key players in obesity-induced insulin resistance. However, there are conflicting reports in the literature based on in vitro quantitative measurements. Here we test the hypothesis that it is not the quantity but the quality that matters. METHODS: The present study combines quantitative and qualitative structural measurements of lipid stores and mitochondrial dynamics in skeletal muscle from lean subjects, and subjects with morbid obesity, with and without type 2 diabetes, before and after gastric bypass surgery...
May 23, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29791774/serotonergic-regulation-of-insulin-secretion
#12
REVIEW
Luis Rodrigo Cataldo Bascuñan, Claire Lyons, Hedvig Bennet, Isabella Artner, Malin Fex
The exact physiological role for the monoamine serotonin (5-HT) in modulation of insulin secretion is yet to be fully understood. Although the presence of this monoamine in islets of Langerhans is well established, it is only with recent advances that the complex signaling network in islets involving 5-HT is being unraveled. With more than fourteen different 5-HT receptors expressed in human islets, and receptor independent mechanisms in insulin producing β-cells, our understanding of 5-HT's regulation of insulin secretion is increasing...
May 23, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29791756/interactions-between-insulin-and-diet-on-striatal-dopamine-uptake-kinetics-in-rodent-brain-slices
#13
Jyoti C Patel, Melissa A Stouffer, Maria Mancini, Charles Nicholson, Kenneth D Carr, Margaret E Rice
Diet influences dopamine transmission in motor- and reward-related basal ganglia circuitry. In part, this reflects diet-dependent regulation of circulating and brain insulin levels. Activation of striatal insulin receptors amplifies axonal dopamine release in brain slices, and regulates food preference in vivo. The effect of insulin on dopamine release is indirect, and requires striatal cholinergic interneurons that express insulin receptors. However, insulin also increases dopamine uptake by promoting dopamine transporter (DAT) surface expression, which counteracts enhanced dopamine release...
May 23, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29791723/functional-and-morphological-recovery-is-incomplete-after-acute-and-acute-recurrent-pancreatitis-in-children
#14
Srikanth Puttaiah Kadyada, Babu Ram Thapa, Karanvir Kaushal, Rama Walia, S V Rana, Narendra Dhaka, Sadhna B Lal, Rajendra Prasad, Subhamoy Das, Rajini Thakur, Kishore Kamal
OBJECTIVE: There is lack of data on functional and morphological recovery after an attack of acute pancreatitis (AP) or acute recurrent pancreatitis (ARP) in children. This study aims to evaluate the functional impairment and morphological changes in the pancreas after recovery. METHODS: All consecutive patients presenting with AP (n=61) or ARP (n=35), as per standard diagnostic criteria were enrolled. After 2 months of pancreatitis, fecal elastase-1(μg/g) and 2-hour oral glucose tolerance test to calculate oral disposition index (DIo )mmol/L-1 (beta cell function) were done...
May 23, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29791677/multifactorial-intervention-for-diabetes-control-among-older-users-of-insulin
#15
Rafael Vaz Machry, Henrique Umpierre Pedroso, Luthiele Silva Vasconcellos, Rafaela Ramos Nunes, Cibelle de Abreu Evaldt, Eduardo Bardou Yunes Filho, Ticiana da Costa Rodrigues
OBJECTIVE: To evaluate if the closer follow-up with the supply of insulin pens and the measurement of capillary blood glucose improve the management of older patients with type 2 diabetes without adequate glycemic control despite extensive therapy. METHODS: This is a prospective, non-randomized, quasi-experimental study. We have included 45 patients over 60 years old, from both sexes, with glycated hemoglobin (HbA1c) > 8.5% using oral hypoglycemic agents and insulin...
2018: Revista de Saúde Pública
https://www.readbyqxmd.com/read/29791653/waist-circumference-is-an-effect-modifier-of-the-association-between-bone-mineral-density-and-glucose-metabolism
#16
Lygia N Barroso, Dayana R Farias, Marcia Soares-Mota, Heloisa Bettiol, Marco Antônio Barbieri, Milton Cesar Foss, Antônio Augusto M da Silva, Gilberto Kac
OBJECTIVE: The role of bone markers on insulin resistance (IR) remains controversial. The objective of this study is to evaluate the association between bone mineral density (BMD) and glucose metabolism and investigate if visceral hyperadiposity, evaluated by waist circumference (WC), is an effect modifier of this association. SUBJECTS AND METHODS: Cross-sectional analysis with 468 young adults from the fourth follow-up of the 1978/79 Ribeirão Preto prospective birth cohort, Brazil...
May 17, 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29791650/metabolic-syndrome-components-are-associated-with-oxidative-stress-in-overweight-and-obese-patients
#17
Nayara Rampazzo Morelli, Bruna Miglioranza Scavuzzi, Lucia Helena da Silva Miglioranza, Marcell Alysson Batisti Lozovoy, Andréa Name Colado Simão, Isaias Dichi
OBJECTIVE: The aim of this study is to evaluate the influence of the body mass index (BMI) and the metabolic syndrome (MetS) parameters on oxidative and nitrosative stress in overweight and obese subjects. SUBJECTS AND METHODS: Individuals were divided into three groups: the control group (G1, n = 131) with a BMI between 20 and 24.9 kg/m2, the overweight group (G2, n = 120) with a BMI between 25 and 29.9 kg/m2 and the obese group (G3, n = 79) with a BMI ≥ 30 kg/m2...
May 17, 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29791596/treatment-with-ilex-paraguariensis-yerba-mate-aqueous-solution-prevents-hepatic-redox-imbalance-elevated-triglycerides-and-microsteatosis-in-overweight-adult-rats-that-were-precociously-weaned
#18
E de Oliveira, N S Lima, E P S Conceição, N Peixoto-Silva, E G Moura, P C Lisboa
Early weaning (EW) leads to overweight, visceral obesity, hyperleptinemia, and insulin resistance in adulthood. Treatment with Ilex paraguariensis (yerba mate) improves obesity and insulin resistance in these animals. Here, we evaluated the effects of chronic treatment with yerba mate on the redox balance and liver morphology of overweight early-weaned rats. To induce EW, we wrapped the dams with bandages to interrupt milk access during the last 3 days of lactation. Control pups (C) had free access to maternal milk for the full 21 days of lactation...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29791572/is-lipid-accumulation-product-associated-with-an-atherogenic-lipoprotein-profile-in-brazilian-subjects
#19
Flavia De Conti Cartolano, Caroline Pappiani, Maria Camila Prupper de Freitas, Antonio M Figueiredo Neto, Antônio Augusto Ferreira Carioca, Nágila Raquel Teixeira Damasceno
BACKGROUND: Lipid accumulation product (LAP), a simple and low-cost tool, is a novel biomarker of central lipid accumulation and represents a potential surrogate marker for atherogenic lipoprotein profile. However, its association with lipoprotein subfractions has not been described in the literature. OBJECTIVE: To determine whether LAP index could be used as a marker of low- and high-density lipoprotein (LDL and HDL) size in Brazilian individuals. METHODS: This cross-sectional study included patients (n = 351) of both sexes and age between 30-74 years...
April 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29791512/cpr-ir-is-an-insulin-resistance-index-that-is-minimally-affected-by-hepatic-insulin-clearance-a-preliminary-research
#20
Tsuyoshi Okura, Risa Nakamura, Yohei Fujioka, Sonoko Kawamoto-Kitao, Yuichi Ito, Kazuhisa Matsumoto, Kyoko Shoji, Keisuke Sumi, Kazuhiko Matsuzawa, Shoichiro Izawa, Etsuko Ueta, Masahiko Kato, Takeshi Imamura, Shin-Ichi Taniguchi, Kazuhiro Yamamoto
BACKGROUND: Increased hepatic insulin clearance (HIC) is important in the pathophysiology of type 2 diabetes mellitus (T2DM). The aim of this study is to analyze an effective insulin resistance (IR) index that is minimally affected by HIC. METHODS: Our study involved 20 participants with T2DM and 21 healthy participants without diabetes (Non-DM). Participants underwent a meal tolerance test from which plasma glucose, insulin and serum C-peptide immunoreactivity (CPR) were measured, and HOMA-IR and HIC were calculated...
2018: PloS One
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