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BCAA & insulin resistance

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https://www.readbyqxmd.com/read/28802074/altered-amino-acid-concentrations-in-nafld-impact-of-obesity-and-insulin-resistance
#1
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/28768654/effect-of-the-interaction-between-diet-composition-and-the-ppm1k-genetic-variant-on-insulin-resistance-and-%C3%AE-cell-function-markers-during-weight-loss-results-from-the-nutrient-gene-interactions-in-human-obesity-implications-for-dietary-guidelines-nugenob-randomized
#2
RANDOMIZED CONTROLLED TRIAL
Leticia Goni, Lu Qi, Marta Cuervo, Fermín I Milagro, Wim H Saris, Ian A MacDonald, Dominique Langin, Arne Astrup, Peter Arner, Jean-Michel Oppert, Mathilde Svendstrup, Ellen E Blaak, Thorkild Ia Sørensen, Torben Hansen, J Alfredo Martínez
Background: Circulating branched-chain amino acids (BCAAs) and aromatic amino acids (AAAs) have been shown to be associated with insulin resistance and diabetes risk. The common rs1440581 T allele in the protein phosphatase Mg2+/Mn2+ dependent 1K (PPM1K) gene has been related to elevated BCAA concentrations and risk of type 2 diabetes.Objective: In the present study, we tested whether dietary fat and carbohydrate intakes influenced the association between the rs1440581 PPM1K genetic variant and glucose-metabolism traits during weight loss...
September 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28752051/repletion-of-branched-chain-amino-acids-reverses-mtorc1-signaling-but-not-improved-metabolism-during-dietary-protein-dilution
#3
Adriano Maida, Jessica S K Chan, Kim A Sjøberg, Annika Zota, Dieter Schmoll, Bente Kiens, Stephan Herzig, Adam J Rose
OBJECTIVE: Dietary protein dilution (PD) has been associated with metabolic advantages such as improved glucose homeostasis and increased energy expenditure. This phenotype involves liver-induced release of FGF21 in response to amino acid insufficiency; however, it has remained unclear whether dietary dilution of specific amino acids (AAs) is also required. Circulating branched chain amino acids (BCAAs) are sensitive to protein intake, elevated in the serum of obese humans and mice and thought to promote insulin resistance...
August 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28713581/short-term-elevation-in-dietary-protein-intake-does-not-worsen-insulin-resistance-or-lipids-in-older-adults-with-metabolic-syndrome-a-randomized-controlled-trial
#4
Il-Young Kim, Scott E Schutzler, Gohar Azhar, Robert R Wolfe, Arny A Ferrando, Robert H Coker
BACKGROUND: There is a great deal of controversy as to whether higher protein intake improves or worsens insulin sensitivity in humans. The purpose of the study was to determine the influence of a short-term elevation in dietary protein on hepatic and peripheral insulin sensitivity in twelve older subjects (51-70 yrs) with metabolic syndrome. METHODS: Individuals were randomly assigned to one of the dietary groups: recommended protein intake (RPI, 10% of daily calorie intake) or elevated protein intake (EPI, 20% of daily calorie intake) for 4 weeks...
2017: BMC Nutrition
https://www.readbyqxmd.com/read/28672086/circulating-branched-chain-amino-acids-in-children-with-obstructive-sleep-apnea
#5
Antonia Barceló, Josep Miquel Bauça, José Antonio Peña-Zarza, Daniel Morell-Garcia, Aina Yáñez, Gerardo Pérez, Javier Piérola, Nuria Toledo, Mónica de la Peña
INTRODUCTION: The effects of obstructive sleep apnea (OSA) on the metabolic system are not well understood, especially in children. Recent studies have provided evidence of the modulation of insulin action by branched-chain amino acids (BCAAs) and suggested novel mechanistic relationships between glucose and amino acid metabolic pathways. We hypothesized that plasma BCAA levels may serve as biomarkers of insulin resistance and metabolic dysfunction in children with OSA. METHODS: A polysomnography was conducted for the diagnosis of OSA in 90 snoring children, in a tertiary hospital...
August 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28641781/pregnancy-to-postpartum-transition-of-serum-metabolites-in-women-with-gestational-diabetes
#6
Elin Chorell, Ulrika Andersson Hall, Carolina Gustavsson, Kerstin Berntorp, Jatta Puhkala, Riitta Luoto, Tommy Olsson, Agneta Holmäng
CONTEXT: Gestational diabetes is commonly linked to development of type 2 diabetes mellitus (T2DM). There is a need to characterize metabolic changes associated with gestational diabetes in order to find novel biomarkers for T2DM. OBJECTIVE: To find potential pathophysiological mechanisms and markers for progression from gestational diabetes mellitus to T2DM by studying the metabolic transition from pregnancy to postpartum. DESIGN: The metabolic transition profile from pregnancy to postpartum was characterized in 56 women by mass spectrometry-based metabolomics; 11 women had gestational diabetes mellitus, 24 had normal glucose tolerance, and 21 were normoglycaemic but at increased risk for gestational diabetes mellitus...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640216/a-branched-chain-amino-acid-related-metabolic-signature-characterizes-obese-adolescents-with-non-alcoholic-fatty-liver-disease
#7
Martina Goffredo, Nicola Santoro, Domenico Tricò, Cosimo Giannini, Ebe D'Adamo, Hongyu Zhao, Gang Peng, Xiaoqing Yu, Tukiet T Lam, Bridget Pierpont, Sonia Caprio, Raimund I Herzog
Dysregulation of several metabolite pathways, including branched-chain amino acids (BCAAs), are associated with Non-Alcoholic Fatty Liver Disease (NAFLD) and insulin resistance in adults, while studies in youth reported conflicting results. We explored whether, independently of obesity and insulin resistance, obese adolescents with NAFLD display a metabolomic signature consistent with disturbances in amino acid and lipid metabolism. A total of 180 plasma metabolites were measured by a targeted metabolomic approach in 78 obese adolescents with (n = 30) or without (n = 48) NAFLD assessed by magnetic resonance imaging (MRI)...
June 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28574481/leucine-supplementation-differently-modulates-branched-chain-amino-acid-catabolism-mitochondrial-function-and-metabolic-profiles-at-the-different-stage-of-insulin-resistance-in-rats-on-high-fat-diet
#8
Rui Liu, Hui Li, Wenjuan Fan, Qiu Jin, Tingting Chao, Yuanjue Wu, Junmei Huang, Liping Hao, Xuefeng Yang
The available findings concerning the association between branched-chain amino acids (BCAAs)-particularly leucine-and insulin resistance are conflicting. BCAAs have been proposed to elicit different or even opposite effects, depending on the prevalence of catabolic and anabolic states. We tested the hypothesis that leucine supplementation may exert different effects at different stages of insulin resistance, to provide mechanistic insights into the role of leucine in the progression of insulin resistance. Male Sprague-Dawley rats were fed a normal chow diet, high-fat diet (HFD), HFD supplemented with 1...
June 2, 2017: Nutrients
https://www.readbyqxmd.com/read/28521878/combining-a-nontargeted-and-targeted-metabolomics-approach-to-identify-metabolic-pathways-significantly-altered-in-polycystic-ovary-syndrome
#9
Alice Y Chang, Antigoni Z Lalia, Gregory D Jenkins, Tumpa Dutta, Rickey E Carter, Ravinder J Singh, K Sreekumaran Nair
OBJECTIVE: Polycystic ovary syndrome (PCOS) is a condition of androgen excess and chronic anovulation frequently associated with insulin resistance. We combined a nontargeted and targeted metabolomics approach to identify pathways and metabolites that distinguished PCOS from metabolic syndrome (MetS). METHODS: Twenty obese women with PCOS were compared with 18 obese women without PCOS. Both groups met criteria for MetS but could not have diabetes mellitus or take medications that treat PCOS or affect lipids or insulin sensitivity...
June 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28513068/a-randomized-controlled-trial-branched-chain-amino-acid-levels-and-glucose-metabolism-in-patients-with-obesity-and-sleep-apnea
#10
Antonia Barceló, Daniel Morell-Garcia, Neus Salord, Cristina Esquinas, Gerardo Pérez, Antonio Pérez, Carmen Monasterio, Merce Gasa, Ana Maria Fortuna, Josep Maria Montserrat, Mercedes Mayos
There is evidence that changes in branched-chain amino acid (BCAA) levels may correlate with the efficacy of therapeutic interventions for affecting improvement in metabolic control. The objective of this study was to evaluate whether serum concentrations of BCAAs (leucine, isoleucine, valine) could mediate in insulin sensitivity and glucose tolerance after continuous positive airway pressure (CPAP) treatment in patients with obstructive sleep apnea (OSA). A prospective randomized controlled trial of OSA patients with morbid obesity was conducted...
May 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28492501/urinary-metabolomics-in-pediatric-obesity-and-nafld-identifies-metabolic-pathways-metabolites-related-to-dietary-habits-and-gut-liver-axis-perturbations
#11
Jacopo Troisi, Luca Pierri, Annamaria Landolfi, Francesca Marciano, Antonella Bisogno, Federica Belmonte, Carmen Palladino, Salvatore Guercio Nuzio, Pietro Campiglia, Pietro Vajro
To get insight into still elusive pathomechanisms of pediatric obesity and non-alcoholic fatty liver disease (NAFLD) we explored the interplay among GC-MS studied urinary metabolomic signature, gut liver axis (GLA) abnormalities, and food preferences (Kid-Med). Intestinal permeability (IP), small intestinal bacterial overgrowth (SIBO), and homeostatic model assessment-insulin resistance were investigated in forty children (mean age 9.8 years) categorized as normal weight (NW) or obese (body mass index <85th or >95th percentile, respectively) ± ultrasonographic bright liver and hypertransaminasemia (NAFLD)...
May 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28486439/branched-chain-and-aromatic-amino-acids-in-relation-to-behavioral-problems-among-young-inuit-from-nunavik-canada-a-cohort-study
#12
Audray St-Jean, Salma Meziou, Cynthia Roy, Pierre Ayotte, Gina Muckle, Michel Lucas
BackgroundObesity and insulin resistance are linked with mood disorders, and elevated concentrations of branched-chain (BCAAs) and aromatic amino acids (AAAs). Our study aimed to prospectively assess the relationship between childhood plasma BCAAs and AAAs, and behavioral problems in young Inuit from Nunavik.MethodsWe analyzed data on 181 children (with a mean age of 11.4 years at baseline) involved in the Nunavik Child Development Study. Plasma BCAA and AAA concentrations were measured in childhood (2005-2010)...
September 2017: Pediatric Research
https://www.readbyqxmd.com/read/28482070/elevated-%C3%AE-hydroxybutyrate-and-branched-chain-amino-acid-levels-predict-deterioration-of-glycemic-control-in-adolescents
#13
Domenico Tricò, Hetty Prinsen, Cosimo Giannini, Robin de Graaf, Christoph Juchem, Fangyong Li, Sonia Caprio, Nicola Santoro, Raimund I Herzog
Context: Traditional risk factors for type 2 diabetes mellitus are weak predictors of changes in glucose tolerance and insulin sensitivity in youth. Objective: To identify early metabolic features of insulin resistance (IR) in youth and whether they predict deterioration of glycemic control. Design and Setting: A cross-sectional and longitudinal study was conducted at the Yale Pediatric Obesity Clinic. Patients and Intervention: Concentrations of α-hydroxybutyrate, β-hydroxybutyrate, lactate, and branched-chain amino acids (BCAAs) were measured by nuclear magnetic resonance spectroscopy in 78 nondiabetic adolescents during an oral glucose tolerance test (OGTT)...
July 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28439093/gene-expression-profile-of-subcutaneous-adipose-tissue-in-bmi-discordant-monozygotic-twin-pairs-unravels-molecular-and-clinical-changes-associated-with-sub-types-of-obesity
#14
M Muniandy, S Heinonen, H Yki-Järvinen, A Hakkarainen, J Lundbom, N Lundbom, J Kaprio, A Rissanen, M Ollikainen, K H Pietiläinen
BACKGROUND: Subcutaneous adipose tissue (SAT) undergoes major changes in obesity, but little is known about the whole-genome scale patterns of these changes or about their variation between different obesity sub-groups. We sought to compare how transcriptomics profiles in SAT differ between monozygotic (MZ) co-twins who are discordant for body mass index (BMI), whether the profiles vary between twin pairs and whether the variation can be linked to clinical characteristics. METHODS: We analysed the transcriptomics (Affymetrix U133 Plus 2...
August 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28437198/branched-chain-amino-acids-are-associated-with-insulin-resistance-independent-of-leptin-and-adiponectin-in-subjects-with-varying-degrees-of-glucose-tolerance
#15
Margery A Connelly, Justyna Wolak-Dinsmore, Robin P F Dullaart
BACKGROUND: Branched chain amino acids (BCAA) may be involved in the pathogenesis of insulin resistance and are associated with type 2 diabetes mellitus (T2DM) development. Adipokines such as leptin and adiponectin influence insulin resistance and reflect adipocyte dysfunction. We examined the extent to which the association of BCAA with insulin resistance is attributable to altered leptin and adiponectin levels in individuals with varying degrees of glucose tolerance. METHODS: BCAA were measured by nuclear magnetic resonance, whereas leptin and adiponectin were measured by immunoassay, in subjects with normal fasting glucose (n = 30), impaired fasting glucose (n = 25), and T2DM (n = 15)...
May 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28413737/amino-acid-leucine-chromatography-a-study-of-branched-chain-aminoaciduria-in-type-2-diabetes
#16
Bhagavan Reddy Kolanu, Venugopal Boddula, Sabitha Vadakedath, Venkataramana Kandi
INTRODUCTION: Diabetes is a disease characterized by insulin deficiency resulting in glucose intolerance and in abnormalities of other metabolic fuels including protein. Recently, a number of studies have revealed that branched-chain amino acids (BCAAs) (leucine, isoleucine, and valine) play an important role in the regulation of protein synthesis by activating mammalian target of rapamycin (mTOR) in pancreatic β cells. BCAAs have positive effects on the regulation of glucose homeostasis...
March 12, 2017: Curēus
https://www.readbyqxmd.com/read/28378845/central-adiposity-induced-plasma-free-amino-acid-alterations-are-associated-with-increased-insulin-resistance-in-healthy-singaporean-adults
#17
X Bi, S L Tey, Y T Loo, C J Henry
BACKGROUND/OBJECTIVES: Recent metabolomics technique reveals a plasma-free amino acid (PFAA)-based metabolite signature that is suggestive of altered PFAAs being an early manifestation of obesity-related insulin resistance. However, the PFAA profiles within non-obese, but more insulin-resistant Asians are not well researched. Compared with Caucasians, Asian populations have more central adiposity, which is generally regarded as metabolically more adverse, but the underlying mechanisms remain unclear...
September 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28323986/chronic-intranasal-insulin-does-not-affect-hepatic-lipids-but-lowers-circulating-bcaas-in-healthy-male-subjects
#18
RANDOMIZED CONTROLLED TRIAL
Thomas Scherer, Peter Wolf, Sabina Smajis, Melania Gaggini, Martina Hackl, Amalia Gastaldelli, Peter Klimek, Elisa Einwallner, Rodrig Marculescu, Anton Luger, Clemens Fürnsinn, Siegfried Trattnig, Christoph Buettner, Martin Krššák, Michael Krebs
Context: Nonalcoholic fatty liver disease and elevated circulating branched-chain amino acids (BCAAs) are common characteristics of obesity and type 2 diabetes. In rodents, brain insulin signaling controls both hepatic triglyceride secretion and BCAA catabolism. Whether brain insulin signaling controls similar metabolic pathways in humans is unknown. Objective: Here we assessed if intranasal insulin, a method to preferentially deliver insulin to the central nervous system, is able to modulate hepatic lipid content and plasma BCAAs in humans...
April 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28238968/changes-in-macroautophagy-chaperone-mediated-autophagy-and-mitochondrial-metabolism-in-murine-skeletal-and-cardiac-muscle-during-aging
#19
Jin Zhou, Shu Yun Chong, Andrea Lim, Brijesh K Singh, Rohit A Sinha, Adam B Salmon, Paul M Yen
Aging causes a general decline in cellular metabolic activity, and function in different tissues and whole body homeostasis. However, the understanding about the metabolomic and autophagy changes in skeletal muscle and heart during aging is still limited. We thus examined markers for macroautophagy, chaperone-mediated autophagy (CMA), mitochondrial quality control, as well as cellular metabolites in skeletal and cardiac muscle from young (5 months old) and aged (27 months old) mice. We found decreased autophagic degradation of p62 and increased ubiquitinated proteins in both tissues from aged mice, suggesting a decline in macroautophagy during aging...
February 26, 2017: Aging
https://www.readbyqxmd.com/read/28184960/genetic-evidence-of-a-causal-effect-of-insulin-resistance-on-branched-chain-amino-acid-levels
#20
Yuvaraj Mahendran, Anna Jonsson, Christian T Have, Kristine H Allin, Daniel R Witte, Marit E Jørgensen, Niels Grarup, Oluf Pedersen, Tuomas O Kilpeläinen, Torben Hansen
AIMS/HYPOTHESIS: Fasting plasma levels of branched-chain amino acids (BCAAs) are associated with insulin resistance, but it remains unclear whether there is a causal relation between the two. We aimed to disentangle the causal relations by performing a Mendelian randomisation study using genetic variants associated with circulating BCAA levels and insulin resistance as instrumental variables. METHODS: We measured circulating BCAA levels in blood plasma by NMR spectroscopy in 1,321 individuals from the ADDITION-PRO cohort...
May 2017: Diabetologia
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