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https://www.readbyqxmd.com/read/28630069/degradation-of-incretins-and-modulation-of-blood-glucose-levels-by-periodontopathic-bacterial-dipeptidyl-peptidase-4
#1
Yuko Ohara-Nemoto, Manami Nakasato, Yu Shimoyama, Tomomi T Baba, Takeshi Kobayakawa, Toshio Ono, Takashi Yaegashi, Shigenobu Kimura, Takayuki K Nemoto
Severe periodontitis is known to aggravate diabetes mellitus, though molecular events related to that link have not been fully elucidated. Porphyromonas gingivalis, a major pathogen of periodontitis, expresses dipeptidyl peptidase 4 (DPP4), which is involved in regulation of blood glucose levels by cleaving incretins in humans. We examined the enzymatic characteristics of DPP4 from P. gingivalis as well as two other periodontopathic bacteria, Tannerella forsythia and Prevotella intermedia, and determined whether it is capable of regulating blood glucose levels...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28624668/kcnq1-gene-polymorphism-is-associated-with-glycaemic-response-to-treatment-with-dpp-4-inhibitors
#2
Ivana Gotthardová, Martin Javorský, Lucia Klimčáková, Milan Kvapil, Zbynek Schroner, Miriam Kozárová, Zuzana Malachovská, Anna Ürgeová, Jozef Židzik, Ivan Tkáč
AIMS: Only afew gene variants were associated with the response to dipeptidylpeptidase-4 inhibitors (DPP4I). KCNQ1 gene variants were previously related both to type 2 diabetes (T2D) and incretin effect. We hypothesized that T2D related KCNQ1 variants would be associated with smaller glucose-lowering effect of DDP4I. METHODS: We performed a retrospective study in 137 Caucasian subjects with T2D who were followed for 6months after initiation of DPP4I treatment. Genotyping for KCNQ1 rs163184 and rs151290 was performed using PCR-HRMA and PCR-RFLP methods, respectively...
May 19, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28619058/the-regulatory-role-of-dpp4-in-atherosclerotic-disease
#3
REVIEW
Lihua Duan, Xiaoquan Rao, Chang Xia, Sanjay Rajagopalan, Jixin Zhong
The increasing prevalence of atherosclerosis has become a worldwide health concern. Although significant progress has been made in the understanding of atherosclerosis pathogenesis, the underlying mechanisms are not fully understood. Recent studies suggest dipeptidyl peptidase-4 (DPP4), a regulator of inflammation and metabolism, may be involved in the development of atherosclerotic diseases. There has been increasing clinical and pre-clinical evidence showing DPP4-incretin axis is involved in cardiovascular disease...
June 15, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28611149/glucagon-like-peptide-1-and-glucose-dependent-insulinotropic-peptide-effects-alone-and-in-combination-on-insulin-secretion-and-glucose-disappearance-in-mice
#4
Giovanni Pacini, Bo Ahrén
Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic peptide (GIP) stimulate insulin secretion. They are both released after meal ingestion, and therefore they might cooperate in their actions. However, whether there is a cooperative action of the two incretins is not known. This study therefore investigated the effects on insulin secretion and glucose disappearance of GLP-1 and GIP when given together with intravenous glucose both alone and in combination in mice. Four different doses were used (0...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28610922/central-administration-of-glp-1-and-gip-decreases-feeding-in-mice
#5
Cherl NamKoong, Min Sun Kim, Byeong-Tak Jang, Young Hee Lee, Young-Min Cho, Hyung Jin Choi
Glucagon-like peptide-1 amide (GLP-1) and gastric inhibitory polypeptide (GIP) are incretin hormones regulating energy metabolism. GLP-1 and GIP combination is suggested as a promising therapeutic strategy for treatment of obesity and diabetes. However, the neuronal mechanisms are not yet investigated. In the present study, we investigated the role of central GLP-1 and GIP in regulation of body weight homeostasis. The effect of GLP-1 with GIP on food intake, body weight, locomotor activity were determined following intracerebroventricular (ICV) administration of GLP-1 and/or GIP in mice...
June 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28606576/insulin-sensitizers-improve-the-glp-1-secretion-and-the-amount-of-intestinal-l-cells-on-high-fat-diet-induced-catch-up-growth
#6
Juan Zheng, Kang-Li Xiao, Lulu Chen, Chaodong Wu, Xiang Hu, Tianshu Zeng, Xiao-Qian Chen, Wen-Juan Li, Xiuling Deng, Huiqing Li, Yu-Ming Li
OBJECTIVE: The aim of this study was to investigate whether insulin resistance can result in impaired glucagon-like peptide (GLP)-1 secretion and to determine whether insulin-sensitizing drugs could improve the secretion of GLP-1 in catch-up growth rats. METHODS: Male Sprague Dawley rats were used to establish a catch-up growth model. At the end of weeks 6 and 14, these rats were euthanized to measure energy intake, body weight, plasma triacylglycerol, and nonesterified fatty acid...
July 2017: Nutrition
https://www.readbyqxmd.com/read/28605280/the-gut-a-key-to-the-pathogenesis-of-type-2-diabetes
#7
Jens Juul Holst, Jens Pedersen, Nicolai Jacob Wewer Albrechtsen, Filip Krag Knop
In this communication we discuss the role of the gut for the development of type 2 diabetes mellitus (T2DM). Gastric emptying rates importantly determine postprandial glucose excursions and regulate postprandial secretion of the incretin hormones, glucose-dependent insulinotropic polypeptide (GIP), and glucagon-like peptide-1 (GLP-1). It thereby also determines their powerful, amplifying effect on glucose-induced insulin secretion and thus the ability of the body to regulate glucose disposal. Although disturbances in gastric emptying are not consistent findings in type 2 diabetes, the incretin system is seriously impaired, probably associated with insulin resistance and obesity...
June 12, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28603983/food-components-in-health-promotion-and-disease-prevention
#8
Wolfgang Langhans
The current obesity epidemic with its deleterious effects on public health, and the increase in the prevalence of non-communicable diseases in our aging society have dramatically increased public awareness of nutrition-related health issues. Food components such as fat, sugar, flavors and spices are major determinants of the hedonic value of food, and the constant and almost ubiquitous availability of good-tasting food in our affluent societies promotes overeating and weight gain. On the other hand, several food components, including flavoring compounds and the active ingredients of many plants including spices and herbs (e...
June 12, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28601988/surgical-and-advanced-medical-therapy-for-the-treatment-of-type-2-diabetes-in-class-i-obese-patients-a-short-term-outcome
#9
Mohit Bhandari, Winni Mathur, Ravindra Kumar, Arun Mishra, Mahak Bhandari
BACKGROUND: Bariatric surgery, incretin-based therapy (glucagon-like peptide-1 analogues), and sodium-glucose co-transporter 2 (SGLT2) inhibitors have antidiabetic properties in morbidly obese patients. However, their comparative efficacy in treating type 2 diabetes mellitus (T2DM) in class I obese patients specifically in Indian has not been studied yet. This study evaluates and compares the efficacy and side effect of surgical and advanced medical management of T2DM in class I obese patients...
June 11, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28600546/dipeptidyl-peptidase-4-and-adolescent-idiopathic-scoliosis-expression-in-osteoblasts
#10
Emilie Normand, Anita Franco, Alain Moreau, Valérie Marcil
It has been proposed that girls with adolescent idiopathic scoliosis (AIS) tend to have a taller stature and a lower body mass index. Energy homeostasis, that is known to affect bone growth, could contribute to these characteristics. In circulation, dipeptidyl peptidase-4 (DPP-4) inactivates glucagon-like peptide-1 (GLP-1), an incretin that promotes insulin secretion and sensitivity. Our objectives were to investigate DPP-4 status in plasma and in osteoblasts of AIS subjects and controls and to evaluate the regulatory role of metabolic effectors on DPP-4 expression...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28598027/a-novel-gip-analog-zp4165-enhances-glp-1-induced-body-weight-loss-and-improves-glycemic-control-in-rodents
#11
P K Nørregaard, M A Deryabina, P Tofteng Shelton, J U Fog, J R Daugaard, P Eriksson, L F Larsen, L Jessen
AIM: To investigate the effects of the novel GIP analog, ZP4165, on body weight and glycemic control in rodents. Additionally, to investigate if ZP4165 modulates the anti-obesity and anti-hyperglycemic effects of a GLP-1 agonist (liraglutide). METHODS: The acute insulinotropic effect of ZP4165 was investigated in rats during an oral glucose tolerance test. Long-term effects of ZP4165 on body weight and glycemic control, either alone or in combination with liraglutide, were assessed in diet-induced obese mice and diabetic db/db mice...
June 9, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28596247/incretin-based-treatments-and-mortality-in-patients-with-type-2-diabetes-systematic-review-and-meta-analysis
#12
REVIEW
Jiali Liu, Ling Li, Ke Deng, Chang Xu, Jason W Busse, Per Olav Vandvik, Sheyu Li, Gordon H Guyatt, Xin Sun
Objective To assess the impact of incretin based treatment on all cause mortality in patients with type 2 diabetes.Design Systematic review and meta-analysis of randomised trials.Data sources Medline, Embase, the Cochrane Central Register of Controlled Trials (CENTRAL), and ClinicalTrials.gov.Eligibility criteria Randomised controlled trials that compared glucagon-like peptide-1 (GLP-1) receptor agonists or dipeptidyl peptidase-4 (DPP-4) inhibitors with placebo or active anti-diabetic drugs in patients with type 2 diabetes...
June 8, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28596237/the-snare-protein-syntaxin1a-plays-an-essential-role-in-biphasic-exocytosis-of-the-incretin-hormone-glucagon-like-peptide-1
#13
Sarah E Wheeler, Holly M Stacey, Yasaman Nahaei, Stephen J Hale, Alexandre B Hardy, Frank Reimann, Fiona M Gribble, Pierre Larraufie, Herbert Y Gaisano, Patricia L Brubaker
Exocytosis of the hormone, glucagon-like peptide-1 (GLP-1), by the intestinal L-cell is essential for the incretin effect after nutrient ingestion, and is critical for the actions of dipeptidylpeptidase IV inhibitors that enhance GLP-1 levels in patients with type 2 diabetes. 2-Photon microscopy revealed that exocytosis of GLP-1 is biphasic, with a 1(st) peak at 1-6min and a 2(nd) peak at 7-12min after stimulation with forskolin. Approximately 75% of the exocytotic events were represented by compound granule fusion, and the remainder were accounted for by full fusion of single granules, under basal and stimulated conditions...
June 8, 2017: Diabetes
https://www.readbyqxmd.com/read/28595189/increased-incretin-but-not-insulin-response-after-oral-versus-intravenous-branched-chain-amino-acids
#14
Jan Gojda, Radka Straková, Andrea Plíhalová, Petr Tůma, Jana Potočková, Jan Polák, Michal Anděl
BACKGROUND/AIMS: Branched chain amino acids (BCAAs) are known to exert an insulinotropic effect. Whether this effect is mediated by incretins (glucagon like peptide 1 [GLP-1] or glucose-dependent insulinotropic peptide [GIP]) is not known. The aim of this study was to show whether an equivalent dose of BCAA elicits a greater insulin and incretin response when administered orally than intravenously (IV). METHODS: Eighteen healthy, male subjects participated in 3 tests: IV application of BCAA solution, oral ingestion of BCAA and placebo in an equivalent dose (30...
June 9, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28592636/interleukin-6-protects-pancreatic-%C3%AE-cells-from-apoptosis-by-stimulation-of-autophagy
#15
Amelia K Linnemann, Joseph Blumer, Michelle R Marasco, Therese J Battiola, Heidi M Umhoefer, Jee Young Han, Dudley W Lamming, Dawn Belt Davis
IL-6 is a pleiotropic cytokine with complex roles in inflammation and metabolic disease. The role of IL-6 as a pro- or anti-inflammatory cytokine is still unclear. Within the pancreatic islet, IL-6 stimulates secretion of the prosurvival incretin hormone glucagon-like peptide 1 (GLP-1) by α cells and acts directly on β cells to stimulate insulin secretion in vitro Uncovering physiologic mechanisms promoting β-cell survival under conditions of inflammation and stress can identify important pathways for diabetes prevention and treatment...
June 7, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28582404/drug-class-specific-changes-in-the-volume-and-cost-of-antidiabetic-medications-in-poland-between-2012-and-2015
#16
Andrzej Śliwczyński, Melania Brzozowska, Andrzej Jacyna, Petre Iltchev, Tymoteusz Iwańczuk, Waldemar Wierzba, Michał Marczak, Katarzyna Orlewska, Piotr Szymański, Ewa Orlewska
AIM: to investigate the drug-class-specific changes in the volume and cost of antidiabetic medications in Poland in 2012-2015. METHODS: This retrospective analysis was conducted based on the National Health Fund database covering an entire Polish population. The volume of antidiabetic medications is reported according to ATC/DDD methodology, costs-in current international dollars, based on purchasing power parity. RESULTS: During a 4-year observational period the number of patients, consumption of antidiabetic drugs and costs increased by 17%, 21% and 20%, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28579495/healthy-lifestyle-and-glucagon-like-peptide-1-in-young-and-healthy-adults-a-population-based-study
#17
Philipp Krisai, Stefanie Aeschbacher, Francisco Javier Ruperti Repilado, Tobias Schoen, Andreas Reusser, Manuel Meier, John Todd, Joel Estis, Martin Risch, Lorenz Risch, David Conen
A healthy lifestyle is associated with a lower risk of cardiovascular events and mortality, but underlying mechanisms are not fully understood. The aim of our study was to investigate the relationships between a healthy lifestyle and glucagon-like peptide-1 (GLP-1), an incretin hormone with both glycemic and cardiovascular properties. Healthy participants aged 25-41years without cardiovascular disease, diabetes or a body mass index (BMI) >35kg/m(2) were enrolled in a population-based study. The following metrics were used to build a lifestyle score ranging from 0 to 7 (a higher score indicating a healthier lifestyle): blood pressure (BP) (<120/80mmHg), plasma levels of glycated hemoglobin (<5...
June 1, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28579479/anti-obesogenic-and-hypolipidemic-effects-of-a-glucagon-like-peptide-1-receptor-agonist-derived-from-the-saliva-of-the-gila-monster
#18
Patricia Lucio Alves, Fernando Mauricio Francis Abdalla, Rafaela Fadoni Alponti, Paulo Flavio Silveira
INTRODUCTION: Glucagon-like peptide-1 (GLP-1) receptor (R) agonists are a class of incretin mimetic drugs that have been used for the treatment of type 2 diabetes mellitus and also considered strong candidates for the treatment of obesity. The original prototypical drug in this class is the exenatide, a synthetic peptide with the same structure as the native molecule, exendin-4, found in the saliva of the Gila monster (Heloderma suspectum suspectum lizard). OBJECTIVES: To identify and compare the anti-obesogenic, antidyslipidemic and antidiabetogenic effects of agonism in GLP-1R by exenatide on two distinct models of obesity: induced by hypothalamic injury (MSG) or high-calorie diet (DIO)...
June 1, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28576404/attenuated-diuresis-and-natriuresis-in-response-to-glucagon-like-peptide-1-in-hypertensive-rats-are-associated-with-lower-expression-of-the-glucagon-like-peptide-1-receptor-in-the-renal-vasculature
#19
Fernanda A Savignano, Renato O Crajoinas, Bruna P M Pacheco, Luciene C G Campos, Maria Heloisa M Shimizu, Antonio Carlos Seguro, Adriana C C Girardi
Accumulating evidence from clinical and experimental studies indicates that the incretin glucagon-like peptide-1 (GLP-1) elicits blood-pressure lowering effects via its diuretic, natriuretic and vasodilatory properties. The present study investigated whether acute infusion of GLP-1 induces diuresis and natriuresis in spontaneously hypertensive rats (SHRs). Additionally, we examined whether GLP-1 influences the vascular reactivity of the renal arteries of normotensive and hypertensive rats and elucidated the underlying mechanisms...
May 30, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28575434/incretin-based-therapies-revisiting-their-mode-of-action
#20
Brian T Layden, Barton Wicksteed, Franck Mauvais-Jarvis
No abstract text is available yet for this article.
June 1, 2017: Endocrinology
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