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Insulin Resistence

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https://www.readbyqxmd.com/read/28806738/partial-igf-1-deficiency-is-sufficient-to-reduce-heart-contractibility-angiotensin-ii-sensibility-and-alter-gene-expression-of-structural-and-functional-cardiac-proteins
#1
José Luis González-Guerra, Inma Castilla-Cortazar, Gabriel A Aguirre, Úrsula Muñoz, Irene Martín-Estal, Elena Ávila-Gallego, Miriam Granado, Juan E Puche, Ángel Luis García-Villalón
Circulating levels of IGF-1 may decrease under several circumstances like ageing, metabolic syndrome, and advanced cirrhosis. This reduction is associated with insulin resistance, dyslipidemia, progression to type 2 diabetes, and increased risk for cardiovascular diseases. However, underlying mechanisms between IGF-1 deficiency and cardiovascular disease remain elusive. The specific aim of the present work was to study whether the partial IGF-1 deficiency influences heart and/or coronary circulation, comparing vasoactive factors before and after of ischemia-reperfusion (I/R)...
2017: PloS One
https://www.readbyqxmd.com/read/28806419/effects-of-short-term-dry-immersion-on-bone-remodeling-markers-insulin-and-adipokines
#2
Marie-Thérèse Linossier, Liubov E Amirova, Mireille Thomas, Myriam Normand, Marie-Pierre Bareille, Guillemette Gauquelin-Koch, Arnaud Beck, Marie-Claude Costes-Salon, Christine Bonneau, Claude Gharib, Marc-Antoine Custaud, Laurence Vico
BACKGROUND: Dry immersion (DI), a ground-based model of microgravity previously used in Russia, has been recently implemented in France. The aim of this study was to analyze early events in a short-term DI model in which all conditions are met to investigate who is first challenged from osteo- or adipo-kines and to what extent they are associated to insulin-regulating hormones. METHODS: Twelve healthy men were submitted to a 3-day DI. Fasting blood was collected during pre-immersion phase for the determination of the baseline data collection (BDC), daily during DI (DI24h, DI48H and DI72h), then after recovery (R+3h and R+24h)...
2017: PloS One
https://www.readbyqxmd.com/read/28805745/insulin-resistance-and-nafld-a-dangerous-liaison-beyond-the-genetics
#3
REVIEW
Melania Manco
Over the last decade, the understanding of the association between insulin resistance (IR) and non-alcoholic fatty liver disease (NAFLD) has dramatically evolved. There is clear understanding that carriers of some common genetic variants, i.e., the patatin-like phospholipase domain-containing 3 (PNPLA3) or the transmembrane 6 superfamily member 2 (TM6SF2) are at risk of developing severe forms of NAFLD even in the presence of reduced or absent IR. In contrast, there are obese patients with "metabolic" (non-genetically driven) NAFLD who present severe IR...
August 14, 2017: Children
https://www.readbyqxmd.com/read/28805698/artemisia-iwayomogi-extract-attenuates-high-fat-diet-induced-hypertriglyceridemia-in-mice-potential-involvement-of-the-adiponectin-ampk-pathway-and-very-low-density-lipoprotein-assembly-in-the-liver
#4
Jinhui Lee, Vikram P Narayan, Eun Young Hong, Wan Kyunn Whang, Taesun Park
This study aimed to examine the protective effect of Artemisia iwayomogi extract (AI) against hypertriglyceridemia induced by a high-fat diet (HFD) in mice and to uncover the underlying molecular mechanisms. C57BL/6N mice were fed chow, HFD, HFD + 0.1% AI, HFD + 0.25% AI, or HFD + 0.5% AI for 10 weeks. The addition of 0.25% and 0.5% AI resulted in dose-dependent improvements in the major parameters of hypertriglyceridemia, including plasma triglyceride, free fatty acids, apolipoprotein B, and lipoprotein lipase, with parallel reductions in body weight gain, hepatic lipid accumulation, and insulin resistance...
August 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28804947/periodontitis-and-non-alcoholic-fatty-liver-disease-a-population-based-cohort-investigation-in-the-study-of-health-in-pomerania
#5
Aderonke A Akinkugbe, Gary D Slade, A Sidney Barritt, Steven Offenbacher, Astrid Petersmann, Thomas Kocher, Markus M Lerch, Julia Mayerle, Henry Völzke, Gerardo Heiss, Birte Holtfreter
Non-alcoholic fatty liver disease (NAFLD) affects 20-30% of adults with risk factors like obesity and insulin resistance putatively acting through chronic low-grade inflammation. Because periodontitis elicits low-grade inflammation, we hypothesized that it could contribute to NAFLD occurrence. Objective To investigate epidemiologic associations between periodontitis and the incidence of NAFLD among 2,623 participants of the Study of Health in Pomerania METHODS: Periodontitis at baseline was defined as the percentage of sites (0%, 1-30%, ≥30%) with 1) clinical attachment level (CAL) ≥3mm; 2) probing pocket depth (PD) ≥4mm...
August 14, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28804876/insulin-resistance-in-pregnant-women-with-and-without-polycystic-ovary-syndrome-and-measures-of-body-composition-in-offspring-at-birth-and-3-years-of-age
#6
Sara Kristín Finnbogadóttir, Dorte Glintborg, Tina Kold Jensen, Henriette Kyhl, Ellen A Nohr, Marianne Andersen
Polycystic ovary syndrome (PCOS) is associated with obesity and insulin resistance in the non-pregnant state, but little is known about insulin sensitivity in the pregnant state. Our objective was to compare insulin resistance in pregnant women with and without PCOS and explore the impact of PCOS on body composition in offspring at birth and at 3 years of age MATERIAL AND METHODS: A prospective cohort study including 2548 live born singleton mother-child pairs residing in Odense municipality, Denmark, during 2010-2013...
August 14, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28804542/significant-association-of-trem-1-with-hmgb1-tlrs-and-rage-in-the-pathogenesis-of-insulin-resistance-in-obese-diabetic-populations
#7
Saravanan Subramanian, Pradeep K Pallati, Poonam Sharma, Devendra K Agrawal, Kalyana C Nandipati
Activated cell surface and intracellular receptors lead to insulin resistance in obesity. Among these receptors, triggering receptors expressed on myeloid cells (TREM)-1, toll like receptors (TLRs), and receptors for advanced glycation end products (RAGE) play a significant role in the induction of inflammatory response in innate immunity. TREM-1 potentially amplifies TLRs and RAGE synergistically with DNA-binding high-mobility group box 1 (HMGB-1). The objective of the study was to analyze the association between TREM-1/DAP12 and HMGB-1, RAGE and TLRs in obesity-induced insulin resistance...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28804442/mesozeaxanthin-protects-the-liver-and-reduces-cardio-metabolic-risk-factors-in-an-insulin-resistant-rodent-model
#8
Kazim Sahin, Cemal Orhan, Fatih Akdemir, Mehmet Tuzcu, Nurhan Sahin, Ismet Yilmaz, Shakir Ali, Jayant Deshpande, Vijaya Juturu
Background: Mesozeaxanthin (MZ) is a macular carotenoid which has been reported to have a number of pharmacological properties, including the antioxidant, and anticarcinogenic property, and has been stated to decrease the hepatocyte lipid content. Objective: In this study, we investigated the effect of MZ on cardio-metabolic health risk (CMHR) and its probable mechanisms of action in rats fed a high-fat diet (HFD). Design: Rats were randomly divided into four groups consisting of (i) Control, (ii) MZ, (iii) HFD, and (iv) HFD+MZ...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/28803916/mitigating-ischemic-injury-of-stem-cell-derived-insulin-producing-cells-after-transplant
#9
Gaetano Faleo, Holger A Russ, Steven Wisel, Audrey V Parent, Vinh Nguyen, Gopika G Nair, Jonathan E Freise, Karina E Villanueva, Gregory L Szot, Matthias Hebrok, Qizhi Tang
The advent of large-scale in vitro differentiation of human stem cell-derived insulin-producing cells (SCIPC) has brought us closer to treating diabetes using stem cell technology. However, decades of experiences from islet transplantation show that ischemia-induced islet cell death after transplant severely limits the efficacy of the therapy. It is unclear to what extent human SCIPC are susceptible to ischemia. In this study, we show that more than half of SCIPC die shortly after transplantation. Nutrient deprivation and hypoxia acted synergistically to kill SCIPC in vitro...
August 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28803747/novel-heterozygous-mutations-of-the-insr-gene-in-a-familial-case-of-donohue-syndrome
#10
Litao Qin, Xiaobo Li, Qiaofang Hou, Hongdan Wang, Guiyu Lou, Tao Li, Li Wang, Hongyan Liu, Xichuan Li, Shixiu Liao
Donohue syndrome (DS), a rare autosomal recessive disease which represents severe insulin resistance, pre- and postnatal growth retardation, hypertrichosis, and dysmorphic features, is caused by mutations in the insulin receptor (INSR) gene. Here, we have reported the clinical, molecular, and biochemical characterizations of a patient with DS. In this article, we have also reported a case with 2 novel INSR mutations and the DS phenotype. Using next-generation sequencing (NGS), we screened 27 known genes involved in inherited maturity-onset diabetes of the young (MODY) and identified compound heterozygous mutations in the INSR gene in the patient with DS, c...
August 10, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28803675/the-yale-fitness-intervention-trial-in-female-cancer-survivors-cardiovascular-and-physiological-outcomes
#11
M Tish Knobf, Sangchoon Jeon, Barbara Smith, Lyndsay Harris, Siobhan Thompson, Mitchel R Stacy, Karl Insogna, Albert J Sinusas
BACKGROUND: Induced premature menopause and cardio-toxic therapy increase cardiovascular disease risk in female cancer survivors. OBJECTIVE: To compare the effects of a 12 month aerobic-resistance fitness center intervention to home based physical activity on cardiovascular function and metabolic risk factors. METHODS: Subjects (N = 154) who had completed primary and/or adjuvant chemotherapy (past 3 years) were randomized to a fitness center intervention or a home based group...
August 10, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28802700/salivary-extracellular-rna-biomarkers-for-insulin-resistance-detection-in-hispanics
#12
Yong Zhang, Jie Sun, Feng Li, Tristan R Grogan, Jose L Vergara, QingXian Luan, Moon-Soo Park, David Chia, David Elashoff, Kaumudi J Joshipura, David T W Wong
AIMS: Insulin resistance (IR) detection is challenging and no test is currently used in clinical practice. We developed salivary biomarkers that could be used for IR detection. METHODS: We collected saliva from 186 healthy and 276 pre-diabetic participants, divided them into high and low IR groups based on a HOMA cutoff of 2.5. We profiled extracellular transcriptome by microarray in saliva supernatant from 23 high IR and 15 low IR participants, and pre-validated the top ten extracellular mRNA (exRNA) markers in a new cohort of 40 high and 40 low IR participants...
July 19, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28802640/nonalcoholic-fatty-liver-disease-associated-with-metabolic-syndrome-influence-of-liver-fibrosis-stages-on-characteristics-of-very-low-density-lipoproteins
#13
Diego Lucero, Verónica Miksztowicz, Gisela Gualano, Cristina Longo, Graciela Landeira, Estela Álvarez, Valeria Zago, Fernando Brites, Gabriela Berg, Eduardo Fassio, Laura Schreier
BACKGROUND: We evaluated possible changes in VLDLcharacteristics, and metabolic related factors, in MetS-associated NAFLD and accompanying liver fibrosis. METHODS: We studied 36 MetS patients with biopsy-proven NAFLD (MetS+NAFLD) and 24 MetS without ultrasound NAFLD evidence. Further, MetS+NAFLD was sub-divided according to fibrosis stage into, non-to-moderate (F0-F2, n=27) and severe (F3-F4, n=9) fibrosis. We measured: lipid profile, VLDL composition and size (size exclusion-HPLC), CETP and lipoprotein lipase (LPL) activities and adiponectin...
August 9, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28802581/pkm2-aggravates-palmitate-induced-insulin-resistance-in-hepg2-cells-via-stat3-pathway
#14
Ling Chen, Zhuqi Tang, Xiaohua Wang, Hong Ma, Dandan Shan, Shiwei Cui
Studies have identified that PKM2 is related to the development of glucose intolerance and insulin resistance in rodents and humans. However, the underlying mechanism remains largely unknown. In the present study, we found that PKM2 expression was significantly elevated in insulin-resistant hepatic tissues and hepatocytes, implicating an association between PKM2 expression and hepatic insulin resistance (IR). In vitro study revealed that overexpression of PKM2 impaired the insulin signaling pathway by decreasing the phosphorylation of protein kinase B (Akt) and glycogen synthase kinase-3β (GSK3β)...
August 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28802074/altered-amino-acid-concentrations-in-nafld-impact-of-obesity-and-insulin-resistance
#15
Melania Gaggini, Fabrizia Carli, Chiara Rosso, Emma Buzzigoli, Milena Marietti, Veronica Della Latta, Demetrio Ciociaro, Maria Lorena Abate, Roberto Gambino, Maurizio Cassader, Elisabetta Bugianesi, Amalia Gastaldelli
Plasma concentrations of amino acids (AA), in particular branched chain (BCAA), are often found increased in non-alcoholic fatty liver disease (NAFLD). However, if this is due to increased muscular protein catabolism, obesity and/or increased insulin resistance (IR) or impaired tissue metabolism is not known. Thus, we evaluated a) if subjects with NAFLD non-obese (NAFLD-NO), compared to obese (NAFLD-Ob) display altered plasma AA compared to controls (CT); b) if AA concentrations are associated to IR and liver histology...
August 12, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28801668/exercise-leads-to-unfavourable-cardiac-remodelling-and-enhanced-metabolic-homeostasis-in-obese-mice-with-cardiac-and-skeletal-muscle-autophagy-deficiency
#16
Zhen Yan, Ana Kronemberger, Jay Blomme, Jarrod A Call, Hannah M Caster, Renata O Pereira, Henan Zhao, Vitor U de Melo, Rhianna C Laker, Mei Zhang, Vitor A Lira
Autophagy is stimulated by exercise in several tissues; yet the role of skeletal and cardiac muscle-specific autophagy on the benefits of exercise training remains incompletely understood. Here, we determined the metabolic impact of exercise training in obese mice with cardiac and skeletal muscle disruption of the Autophagy related 7 gene (Atg7(h&mKO)). Muscle autophagy deficiency did not affect glucose clearance and exercise capacity in lean adult mice. High-fat diet in sedentary mice led to endoplasmic reticulum stress and aberrant mitochondrial protein expression in autophagy-deficient skeletal and cardiac muscles...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801592/dietary-arginine-affects-the-insulin-signaling-pathway-glucose-metabolism-and-lipogenesis-in-juvenile-blunt-snout-bream-megalobrama-amblycephala
#17
Hualiang Liang, Habte-Michael Habte-Tsion, Xianping Ge, Mingchun Ren, Jun Xie, Linghong Miao, Qunlan Zhou, Yan Lin, Wenjing Pan
This study evaluated the mechanisms governing insulin resistance, glucose metabolism and lipogenesis in juvenile fish fed with graded levels of dietary arginine. The results showed that, compared with the control group (0.87%), 2.31% dietary arginine level resulted in the upregulation of the relative gene expression of IRS-1, PI3K and Akt in the insulin signaling pathway, while 2.70% dietary arginine level led to inhibition of these genes. 1.62% dietary arginine level upregulated glycolysis by increasing GK mRNA level; 2...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801571/crp-level-associated-polymorphism-rs1205-within-the-crp-gene-is-associated-with-2-hour-glucose-level-the-sapphire-study
#18
Wayne Huey-Herng Sheu, Wen-Chang Wang, Kwan-Dun Wu, Chih-Tsueng He, Chii-Min Hwu, Thomas Quertermous, Wan-Shan Hsieh, Wen-Jane Lee, Chih-Tai Ting, Yii-Der I Chen, Chao A Hsiung
C-reactive protein (CRP) encoded by CRP gene is a reflection of systemic inflammation. Many studies associated CRP level with diabetes and glucose levels, but the association of CRP gene with these traits is unclear. We conducted a cross-sectional study consisting of 945 siblings from 330 families collected by the Stanford Asian Pacific Program in Hypertension and Insulin Resistance (SAPPHIRe) to investigate associations between CRP polymorphisms, circulating CRP, diabetes, and glucose levels. Five single-nucleotide polymorphisms were analyzed: rs3093059, rs2794521, rs1417938, rs1800947, and rs1205...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801525/exercise-of-obese-mice-induces-cardioprotection-and-oxygen-sparing-in-hearts-exposed-to-high-fat-load
#19
Neoma T Boardman, Anne Dragøy Hafstad, Jim Lund, Line Rossvoll, Ellen Aasum
Exercise training is a potent, therapeutic approach in obesity and diabetes that exerts protective effects against development of diabetic cardiomyopathy and ischemic-injury. Acute increases in circulating fatty acids (FAs) during an ischemic insult can challenge the heart, as high FA-load is considered to have adverse cardiac effects. In the present study, we tested the hypothesis that exercise-induced cardiac effects in diet-induced obese mice are abrogated by an acute high FA-load. Diet-induced obese mice were fed a high-fat diet (HFD) for 20 weeks...
August 11, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28801428/relationship-between-estimated-cardiovascular-disease-risk-and-insulin-resistance-in-a-black-african-population-living-with-hiv-a-cross-sectional-study-from-cameroon
#20
Steve Raoul Noumegni, Jean Joel Bigna, Vicky Jocelyne Ama Moor Epse Nkegoum, Jobert Richie Nansseu, Felix K Assah, Ahmadou Musa Jingi, Magellan Guewo-Fokeng, Steve Leumi, Jean-Claude Katte, Mesmin Y Dehayem, Liliane Mfeukeu Kuate, Andre Pascal Kengne, Eugene Sobngwi
OBJECTIVES: Cardiovascular disease (CVD) and metabolic diseases are growing concerns among patients with HIV infection as a consequence of the improving survival of this population. We aimed to assess the relationship between CVD risk and insulin resistance in a group of black African individuals with HIV infection. METHODS: This cross-sectional study involved patients with HIV infection aged 30-74 years and followed up at the Yaoundé Central Hospital, Cameroon...
August 11, 2017: BMJ Open
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