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https://www.readbyqxmd.com/read/29453463/impact-of-gastric-emptying-and-small-intestinal-transit-on-blood-glucose-intestinal-hormones-glucose-absorption-in-the-morbidly-obese
#1
Nam Q Nguyen, Tamara L Debreceni, Jenna E Burgess, Max Bellon, Judith Wishart, Scott Standfield, Charles-Henri Malbert, Michael Horowitz
This study evaluated gastric emptying (GE) and small intestinal (SI) transit in people with morbid obesity and their relationships to glycaemia, incretin hormones, and glucose absorption METHODS: GE and caecal arrival time (CAT) of a mixed meal were assessed in 22 morbidly obese (50.2 ± 2.5 years; 13 F:9 M; BMI: 48.6 ± 1.8 kg/m 2 ) and 10 lean (38.6 ± 8.4 years; 5 F:5 M; BMI: 23.9 ± 0.7 kg/m 2 ) subjects, using scintigraphy. Blood glucose, plasma 3-O-methylglucose, insulin, glucagon, glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) were measured...
January 30, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29452961/dipeptidyl-peptidase-4-inhibitors-dpp-4i-combined-with-vitamin-d3-an-exploration-to-treat-new-onset-type-1-diabetes-mellitus-and-latent-autoimmune-diabetes-in-adults-in-the-future
#2
Marcelo Maia Pinheiro, Felipe Moura Maia Pinheiro, Maria Luisa Trabachin
Type 1 diabetes mellitus (T1DM) is a chronic autoimmune disease characterized by destruction of pancreatic beta cells through cell injury caused primarily by cytotoxic T lymphocytes (CD8 + ). The pathophysiological basis of T1DM seems to be an imbalance between a reduced function of T regulatory lymphocytes and an increased inflammatory activity of Th17 lymphocytes caused by increased production of inflammatory cytokines, as IL-1β, IL-6, IL-17 and IFN-gamma due to environmental factors and genetic predisposition...
February 13, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29451201/tackling-dipeptidyl-peptidase-iv-in-neurological-disorders
#3
REVIEW
Ghaith Al-Badri, Gian Marco Leggio, Giuseppe Musumeci, Rubina Marzagalli, Filippo Drago, Alessandro Castorina
Dipeptidyl peptidase IV (DPP-IV) is a serine protease best known for its role in inactivating glucagon-like peptide-1 (GLP-1), pituitary adenylate cyclase-activating polypeptide (PACAP) and glucose-dependent insulinotropic peptide (GIP), three stimulators of pancreatic insulin secretion with beneficial effects on glucose disposal. Owing to the relationship between DPP-IV and these peptides, inhibition of DPP-IV enzyme activity is considered as an attractive treatment option for diabetic patients. Nonetheless, increasing studies support the idea that DPP-IV might also be involved in the development of neurological disorders with a neuroinflammatory component, potentially through its non-incretin activities on immune cells...
January 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29438631/plasma-endocannabinoid-levels-in-lean-overweight-and-obese-humans-relationships-with-intestinal-permeability-markers-inflammation-and-incretin-secretion
#4
Tanya J Little, Nada Cvijanovic, Nicholas V DiPatrizio, Donovan A Argueta, Christopher K Rayner, Christine Feinle-Bisset, Richard L Young
INTRODUCTION/AIMS: Intestinal production of endocannabinoid and oleoylethanolamide (OEA) is impaired in high-fat diet/obese rodents, leading to reduced satiety. Such diets also alter the intestinal microbiome in association with enhanced intestinal permeability and inflammation, however little is known of these effects in humans. This study aimed to: (i) evaluate effects of lipid on plasma anandamide (AEA), 2-arachidonyl-sn-glycerol (2-AG) and OEA in humans, and (ii) examine relationships with intestinal permeability, inflammation markers and incretin hormone secretion...
February 13, 2018: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29428999/prospective-evaluation-of-insulin-and-incretin-dynamics-in-obese-adults-with-and-without-diabetes-for-2-years-after-roux-en-y-gastric-bypass
#5
Jonathan Q Purnell, Geoffrey S Johnson, Abdus S Wahed, Chiara Dalla Man, Francesca Piccinini, Claudio Cobelli, Ronald L Prigeon, Bret H Goodpaster, David E Kelley, Myrlene A Staten, Karen E Foster-Schubert, David E Cummings, David R Flum, Anita P Courcoulas, Peter J Havel, Bruce M Wolfe
AIMS/HYPOTHESIS: In this prospective case-control study we tested the hypothesis that, while long-term improvements in insulin sensitivity (S I ) accompanying weight loss after Roux-en-Y gastric bypass (RYGB) would be similar in obese individuals with and without type 2 diabetes mellitus, stimulated-islet-cell insulin responses would differ, increasing (recovering) in those with diabetes but decreasing in those without. We investigated whether these changes would occur in conjunction with favourable alterations in meal-related gut hormone secretion and insulin processing...
February 10, 2018: Diabetologia
https://www.readbyqxmd.com/read/29420964/metabolic-surgery-weight-loss-diabetes-and-beyond
#6
REVIEW
Manan Pareek, Philip R Schauer, Lee M Kaplan, Lawrence A Leiter, Francesco Rubino, Deepak L Bhatt
The alarming rise in the worldwide prevalence of obesity is paralleled by an increasing burden of type 2 diabetes mellitus. Metabolic surgery is the most effective means of obtaining substantial and durable weight loss in individuals with obesity. Randomized trials have recently shown the superiority of surgery over medical treatment alone in achieving improved glycemic control, as well as a reduction in cardiovascular risk factors. The mechanisms seem to extend beyond the magnitude of weight loss alone and include improvements in incretin profiles, insulin secretion, and insulin sensitivity...
February 13, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29416857/glp1-and-gip-are-involved-in-the-action-of-synbiotics-in-broiler-chickens
#7
Pawel Antoni Kolodziejski, Maciej Sassek, Daniela Chalupka, Natalia Leciejewska, Leszek Nogowski, Pawel Mackowiak, Damian Jozefiak, Katarzyna Stadnicka, Maria Siwek, Marek Bednarczyk, Tomasz Szwaczkowski, Ewa Pruszynska-Oszmalek
Background: In order to discover new strategies to replace antibiotics in the post-antibiotic era in meat-type chicken production, two new synbiotics were tested: (Lactobacillus salivarius IBB3154 plus galactooligosaccharide (Syn1) and Lactobacillus plantarum IBB3036 plus raffinose family oligosaccharides (Syn2). Methods: The synbiotics were administered via syringe, using a special automatic system, into the egg air chamber of Cobb 500 broiler chicks on the 12th day of egg incubation (2 mg of prebiotics + 105 cfu bacteria per egg)...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29414148/exenatide-modulates-metalloproteinase-expression-in-human-cardiac-smooth-muscle-cells-via-the-inhibition-of-akt-signaling-pathway
#8
Enrique Gallego-Colon, Agnieszka Klych-Ratuszny, Agnieszka Kosowska, Wojciech Garczorz, Mohammad Reza F Aghdam, Michal Wozniak, Tomasz Francuz
BACKGROUND: Incretin analogue drugs, a FDA-approved treatment in diabetes, has been tested for its therapeutic properties as modulators of atherosclerosis. We investigated the effects of incretin drugs on the modulation of gene expression and protein levels of matrix metalloproteinases (MMPs) as well as their inhibitors - tissue inhibitors of metalloproteinases (TIMPs) in coronary artery smooth muscle cells (hCASMC) in the context of atherosclerotic plaque formation and inflammation. METHODS: TNFα-stimulated hCASMC were treated with Glucagon-like Peptide 1 (GLP-1) (10 nM and 100 nM) and Exendin-4 (1 nM and 10 nM)...
October 4, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29412835/control-of-insulin-secretion-by-glp-1
#9
Ben Jones, Stephen R Bloom, Teresa Buenaventura, Alejandra Tomas, Guy A Rutter
Stimulation of insulin secretion by glucagon-like peptide-1 (GLP-1) and other gut-derived peptides is central to the incretin response to ingesting nutriments. Analogues of GLP-1, and inhibitors of its breakdown, have found widespread clinical use for the treatment of type 2 diabetes (T2D) and obesity. The release of these peptides underlies the improvements in glycaemic control and disease remission after bariatric surgery. Given therapeutically, GLP-1 analogues can lead to side effects including nausea, which limit dosage...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412834/targeted-intestinal-delivery-of-incretin-secretagogues-towards-new-diabetes-and-obesity-therapies
#10
Fiona M Gribble, Claire L Meek, Frank Reimann
A new strategy under development for the treatment of type 2 diabetes and obesity is to mimic some of the effects of bariatric surgery by delivering food-related stimuli to the distal gastrointestinal tract where they should enhance the release of gut hormones such as glucagon-like peptide-1 (GLP-1) and peptideYY (PYY). Methods include inhibition of food digestion and absorption in the upper GI tract, or oral delivery of stimuli in capsules or pelleted form to protect them against gastric degradation. A variety of agents have been tested in humans using capsules, microcapsules or pellets, delivering nutrients, bile acids, fatty acids and bitter compounds...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412829/problem-or-solution-the-strange-story-of-glucagon
#11
R V Scott, S R Bloom
Globally, 13% of the world's adult population is obese, and more than 400 million people suffer from diabetes. These conditions are both associated with significant morbidity, mortality and financial cost. Therefore, finding new pharmacological treatments is an imperative. Relative hyperglucagonaemia is seen in all types of diabetes, and has been implicated in its pathogenesis. Consequently, clinical trials are underway using drugs which block glucagon activity to treat type 2 diabetes. Conversely, exogenous glucagon can increase energy expenditure...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412823/cholecystokinin-cck-and-related-adjunct-peptide-therapies-for-the-treatment-of-obesity-and-type-2-diabetes
#12
Varun Pathak, Peter R Flatt, Nigel Irwin
Cholecystokinin (CCK) is a hormone secreted from I-cells of the gut, as well as neurons in the enteric and central nervous system, that binds and activates CCK-1 and CCK-2 receptors to mediate its biological actions. To date knowledge relating to the physiological significance of CCK has predominantly focused around induction of short-term satiety. However, CCK has also been highlighted to possess important actions in relation to the regulation of insulin secretion, as well as overall beta-cell function and survival...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412815/dipeptidyl-peptidase-inhibitor-therapy-in-type-2-diabetes-control-of-the-incretin-axis-and-regulation-of-postprandial-glucose-and-lipid-metabolism
#13
REVIEW
Erin E Mulvihill
Dipeptidyl peptidase 4 (DPP4) is a widely expressed, serine protease which regulates the bioactivity of many peptides through cleavage and inactivation including the incretin hormones, glucagon like peptide -1 (GLP-1) and glucose dependent insulinotropic polypeptide (GIP). Inhibitors of DPP4 are used therapeutically to treat patients with Type 2 Diabetes Mellitus (T2DM) as they potentiate incretin action to regulate islet hormone secretion and improve glycemia and post-prandial lipid excursions. The widespread clinical use of DPP4 inhibitors has increased interest in the molecular mechanisms by which these drugs mediate their beneficial effects...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412811/incretin-based-therapy-for-the-treatment-of-bone-fragility-in-diabetes-mellitus
#14
Guillaume Mabilleau, Benoît Gobron, Béatrice Bouvard, Daniel Chappard
Bone fractures are common comorbidities of type 2 diabetes mellitus (T2DM). Bone fracture incidence seems to develop due to increased risk of falls, poor bone quality and/or anti-diabetic medications. Previously, a relation between gut hormones and bone has been suspected. Most recent evidences suggest indeed that two gut hormones, namely glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1), may control bone remodeling and quality. The GIP receptor is expressed in bone cells and knockout of either GIP or its receptor induces severe bone quality alterations...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412810/glp-1-receptor-agonists-show-neuroprotective-effects-in-animal-models-of-diabetes
#15
Victor A Gault, Christian Hölscher
Enzyme-resistant receptor agonists of the incretin hormone glucagon-like peptide-1 (GLP-1) have shown positive therapeutic effects in people with type 2 diabetes mellitus (T2DM). T2DM has detrimental effects on brain function and impairment of cognition and memory formation has been described. One of the underlying mechanisms is most likely insulin de-sensitization in the brain, as insulin improves cognitive impairments and enhances learning. Treatment with GLP-1 receptor agonists improves memory formation and impairment of synaptic plasticity observed in animal models of diabetes-obesity...
February 2018: Peptides
https://www.readbyqxmd.com/read/29412124/sodium-glucoser-cotransporter-2-inhibitors-glucose-lowering-against-other-hypoglycemic-agents
#16
Konstantinos Avranas, Konstantinos Imprialos, Konstantinos Stavropoulos, Georgios Lales, Alexandos Manafis, Anastasia Skalkou, Lars Kihm
BACKGROUND: The treatment of diabetes remains over the decades challenging, even after the introduction of numerous novel drugs of different classes. Most patients with type 2 diabetes necessitate the combination of multiple agents and eventually use of insulin. The newest, and possibly with the most pleiotropic actions after metformin are the sodium-glucose cotransporter 2 inhibitors (SGLT-2i). This class has a unique mechanism inhibiting the glucose reabsorption in the proximal tubule of the kidney...
February 6, 2018: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/29409957/dpp-4-is-expressed-in-human-pancreatic-beta-cells-and-its-direct-inhibition-improves-beta-cell-function-and-survival-in-type-2-diabetes
#17
Marco Bugliani, Farooq Syed, Flavia M M Paula, Bilal A Omar, Mara Suleiman, Sandra Mossuto, Francesca Grano, Francesco Cardarelli, Ugo Boggi, Fabio Vistoli, Franco Filipponi, Paolo De Simone, Lorella Marselli, Vincenzo De Tata, Bo Ahren, Decio L Eizirik, Piero Marchetti
It has been reported that the incretin system, including regulated GLP-1 secretion and locally expressed DPP-4, is present in pancreatic islets. In this study we comprehensively evaluated the expression and role of DPP-4 in islet alpha and beta cells from non-diabetic (ND) and type 2 diabetic (T2D) individuals, including the effects of its inhibition on beta cell function and survival. Isolated islets were prepared from 25 ND and 18 T2D organ donors; studies were also performed with the human insulin-producing EndoC-βH1 cells...
January 31, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29409356/therapeutic-potential-of-lentivirus-mediated-glucagon-like-peptide-1-glp-1-gene-therapy-for-diabetes
#18
Hale M Tasyurek, Hasan A Altunbas, Mustafa K Balci, Thomas S Griffith, Salih Sanlioglu
Postprandial glucose-induced insulin secretion from the islets of Langerhans is facilitated by glucagon-like peptide-1 (GLP-1) - a metabolic hormone with insulinotropic properties. Among the variety of effects it mediates, GLP-1 induces delta cell secretion of somatostatin, inhibits alpha cell release of glucagon, reduces gastric emptying, and slows food intake. These events collectively contribute to weight loss over time. During type 2 diabetes (T2DM), however, the incretin response to glucose is reduced and accompanied by a moderate reduction in GLP-1 secretion...
February 6, 2018: Human Gene Therapy
https://www.readbyqxmd.com/read/29407055/prediabetes-and-cardiovascular-disease-pathophysiology-and-interventions-for-prevention-and-risk-reduction
#19
REVIEW
Ben Brannick, Sam Dagogo-Jack
Prediabetes is a state characterized by impaired fasting glucose or impaired glucose tolerance. This review discusses the pathophysiology and macrovascular complications of prediabetes. The pathophysiologic defects underlying prediabetes include insulin resistance, alpha- and beta-cell dysfunction, increased lipolysis, inflammation, and suboptimal incretin effect. Recent studies have revealed that the long-term complications of diabetes manifest in some people with prediabetes; these complications include microvascular and macrovascular disorders...
March 2018: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/29404215/equine-glucagon-like-peptide-1-receptor-physiology
#20
Murad H Kheder, Simon R Bailey, Kevin J Dudley, Martin N Sillence, Melody A de Laat
Background: Equine metabolic syndrome (EMS) is associated with insulin dysregulation, which often manifests as post-prandial hyperinsulinemia. Circulating concentrations of the incretin hormone, glucagon-like peptide-1 (GLP-1) correlate with an increased insulin response to carbohydrate intake in animals with EMS. However, little is known about the equine GLP-1 receptor (eGLP-1R), or whether GLP-1 concentrations can be manipulated. The objectives were to determine (1) the tissue localisation of the eGLP-1R, (2) the GLP-1 secretory capacity of equine intestine in response to glucose and (3) whether GLP-1 stimulated insulin secretion from isolated pancreatic islets can be attenuated...
2018: PeerJ
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