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Insulin Resistence

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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
#1
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
#2
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/29792143/recent-updates-on-novel-approaches-in-insulin-drug-delivery-a-review-of-challenges-and-pharmaceutical-implications
#3
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/29792023/fern-9-11-ene-2%C3%AE-3%C3%AE-diol-action-on-insulin-secretion-in-hyperglycemic-conditions
#4
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
#5
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/29791723/functional-and-morphological-recovery-is-incomplete-after-acute-and-acute-recurrent-pancreatitis-in-children
#6
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/29791653/waist-circumference-is-an-effect-modifier-of-the-association-between-bone-mineral-density-and-glucose-metabolism
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/29791203/short-term-thermoneutral-housing-alters-glucose-metabolism-and-markers-of-adipose-tissue-browning-in-response-to-a-high-fat-diet-in-lean-mice
#12
Zachary Stephen Clayton, Carrie E McCurdy
Systemic insulin resistance and glucose intolerance occur with as little as 3 days of a high-fat diet (HFD) in mice and humans; the mechanisms that initiate acute insulin resistance are unknown. Most laboratories house mice at 22{degree sign}C, which is below their thermoneutral temperature (~30{degree sign}C). Cold stress has been shown to increase white adipose tissue (WAT) browning, alter lipid trafficking and impair immune function, while energy intake and expenditure decrease with increasing ambient temperature; importantly, dysregulation of these parameters have been strongly linked to obesity-induced insulin resistance...
May 23, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29790679/the-influence-of-a-3-week-body-mass-reduction-program-on-the-metabolic-parameters-and-free-amino-acid-profiles-in-adult-polish-people-with-obesity
#13
Małgorzata Moszak, Agnieszka Klupczyńska, Alina Kanikowska, Zenon Kokot, Agnieszka Zawada, Małgorzata Grzymisławska, Marian Grzymisławski
BACKGROUND: Previous studies have showed differences in the amino acid (AA) composition in the plasma of people with obesity when compared to lean individuals, but the perturbations of AA concentrations in obesity and the dynamics of AA changes after weight loss is not fully understood. OBJECTIVES: The objective of the study was to evaluate the effect of a short-term weight reduction program on the metabolic status and plasma AA levels in individuals with obesity...
April 16, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29790582/acetyl-coa-carboxylase-inhibition-reverses-nafld-and-hepatic-insulin-resistance-but-promotes-hypertriglyceridemia-in-rodents
#14
Leigh Goedeke, Jamie Bates, Daniel F Vatner, Rachel J Perry, Ting Wang, Ricardo Ramirez, Li Li, Matthew W Ellis, Dongyan Zhang, Kari E Wong, Carine Beysen, Gary W Cline, Adrian S Ray, Gerald I Shulman
Pharmacologic inhibition of acetyl-CoA carboxylase (ACC) enzymes, ACC1 and ACC2, offers an attractive therapeutic strategy for non-alcoholic fatty liver disease (NAFLD) via simultaneous inhibition of fatty acid synthesis and stimulation of fatty acid oxidation. However, the effects of ACC inhibition on hepatic mitochondrial oxidation, anaplerosis, and ketogenesis in vivo are unknown. Here, we evaluated the impact of a novel liver-directed allosteric inhibitor of ACC1 and ACC2 (Compound 1) on these parameters, as well as glucose and lipid metabolism, in control and diet-induced rodent models of NAFLD...
May 23, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29790245/p465l-ppar%C3%AE-mutation-confers-partial-resistance-to-the-hypolipidemic-action-of-fibrates
#15
Sergio Rodriguez-Cuenca, Stefania Carobbio, Gwendolyn Barceló-Coblijn, Xavier Prieur, Joana Relat, Ramon Amat, Mark Campbell, Ana Rita Dias, Myriam Bahri, Sarah L Gray, Antonio Vidal-Puig
Familial partial lipodystrophic syndrome 3 (FPLD3) is associated with mutations in the transcription factor PPARγ. One of these mutations, the P467L, confers a dominant negative effect. We and others have previously investigated the pathophysiology associated to this mutation using a humanised mouse model that recapitulates most of the clinical symptoms observed in patients when phenotyped under different experimental conditions. One of the key clinical manifestations observed both, in humans and mouse models, is the ectopic accumulation of fat in the liver...
May 22, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29789952/carotid-body-ablation-a-new-target-to-address-central-autonomic-dysfunction
#16
REVIEW
Rodrigo Iturriaga
PURPOSE OF REVIEW: An abnormal heightened carotid body (CB) chemoreflex, which produces autonomic dysfunction and sympathetic overactivation, is the common hallmark of obstructive sleep apnea (OSA), resistant hypertension, systolic heart failure (HF), and cardiometabolic diseases. Accordingly, it has been proposed that the elimination of the CB chemosensory input to the brainstem may reduce the autonomic and cardiorespiratory alterations in sympathetic-associated diseases in humans. RECENT FINDINGS: A growing body of evidence obtained in preclinical animal models support that an enhanced CB discharge produces sympathetic hyperactivity, baroreflex sensitivity and heart rate variability impairment, breathing instability, hypertension, and insulin resistance...
May 22, 2018: Current Hypertension Reports
https://www.readbyqxmd.com/read/29789944/the-association-between-age-at-menarche-and-later-risk-of-gestational-diabetes-is-mediated-by-insulin-resistance
#17
Clive J Petry, Ken K Ong, Ieuan A Hughes, Carlo L Acerini, David B Dunger
AIMS: Associations have been reported between age at menarche and the later risk of gestational diabetes. However, it is not known whether these associations reflect differences in insulin sensitivity and/or pancreatic β-cell function in pregnancy. METHODS: We examined this question in women enrolled in the prospective Cambridge Baby Growth Study who recalled their age at menarche in questionnaires during pregnancy. Polynomial logistic and linear regression models were used to relate menarche timing to the risk of gestational diabetes, both unadjusted and adjusted for the Homeostasis Model Assessments of insulin resistance (HOMA IR) and pancreatic β-cell function (HOMA B) at week 28 of pregnancy...
May 22, 2018: Acta Diabetologica
https://www.readbyqxmd.com/read/29789599/exercise-activates-the-pi3k-akt-signal-pathway-by-decreasing-the-expression-of-5%C3%AE-reductase-type-1-in-pcos-rats
#18
Chuyan Wu, Feng Jiang, Ke Wei, Zhongli Jiang
Hyperandrogenism and hyperinsulinemia are main clinical endocrine features of PCOS. Exercise can adjust the androgen level, as well as increase the sensitivity of insulin by activating PI3K-Akt insulin signaling pathways. 5αR1 has certain effects on insulin resistance and can synthesize dihydrotestosterone by metabolizing testosterone. So 5αR1 may be the target of androgen and insulin for exercise-induced regulation. To investigate the role of 5αR1 in the PI3K-Akt signaling pathway in skeletal muscle of PCOS rats activated by exercise, fifty-four female rats were randomly divided into the PCOS group (n = 42) and the control group(n = 12)...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789568/deficiency-of-prkd2-triggers-hyperinsulinemia-and-metabolic-disorders
#19
Yao Xiao, Can Wang, Jia-Yu Chen, Fujian Lu, Jue Wang, Ning Hou, Xiaomin Hu, Fanxin Zeng, Dongwei Ma, Xueting Sun, Yi Ding, Yan Zhang, Wen Zheng, Yuli Liu, Haibao Shang, Wenzhen Zhu, Chensheng Han, Yulin Zhang, Kunfu Ouyang, Liangyi Chen, Ju Chen, Rui-Ping Xiao, Chuan-Yun Li, Xiuqin Zhang
Hyperinsulinemia is the earliest symptom of insulin resistance (IR), but a causal relationship between the two remains to be established. Here we show that a protein kinase D2 (PRKD2) nonsense mutation (K410X) in two rhesus monkeys with extreme hyperinsulinemia along with IR and metabolic defects by using extreme phenotype sampling and deep sequencing analyses. This mutation reduces PRKD2 at both the mRNA and the protein levels. Taking advantage of a PRKD2-KO mouse model, we demonstrate that PRKD2 deletion triggers hyperinsulinemia which precedes to IR and metabolic disorders in the PRKD2 ablation mice...
May 22, 2018: Nature Communications
https://www.readbyqxmd.com/read/29789365/structural-alteration-of-gut-microbiota-during-the-amelioration-of-human-type-2-diabetes-with-hyperlipidemia-by-metformin-and-a-traditional-chinese-herbal-formula-a-multicenter-randomized-open-label-clinical-trial
#20
Xiaolin Tong, Jia Xu, Fengmei Lian, Xiaotong Yu, Yufeng Zhao, Lipeng Xu, Menghui Zhang, Xiyan Zhao, Jian Shen, Shengping Wu, Xiaoyan Pang, Jiaxing Tian, Chenhong Zhang, Qiang Zhou, Linhua Wang, Bing Pang, Feng Chen, Zhiping Peng, Jing Wang, Zhong Zhen, Chao Fang, Min Li, Limei Chen, Liping Zhao
Accumulating evidence implicates gut microbiota as promising targets for the treatment of type 2 diabetes mellitus (T2DM). With a randomized clinical trial, we tested the hypothesis that alteration of gut microbiota may be involved in the alleviation of T2DM with hyperlipidemia by metformin and a specifically designed herbal formula (AMC). Four hundred fifty patients with T2DM and hyperlipidemia were randomly assigned to either the metformin- or AMC-treated group. After 12 weeks of treatment, 100 patients were randomly selected from each group and assessed for clinical improvement...
May 22, 2018: MBio
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