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https://www.readbyqxmd.com/read/28342971/a-novel-dual-glp-1-gip-receptor-agonist-alleviates-cognitive-decline-by-re-sensitizing-insulin-signaling-in-the-alzheimer-icv-stz-rat-model
#1
Lijuan Shi, Zhihua Zhang, Lin Li, Christian Hölscher
Alzheimer's disease (AD) is a progressive neurodegenerative disorder, accompanied by memory loss and cognitive impairments, and there is no effective treatment for it at present. Since type 2 diabetes (T2DM) has been identified as a risk factor for AD, the incretins glucagon-like peptide 1 (GLP-1) and glucose dependent insulinotropic polypeptide (GIP), promising antidiabetic agents for the treatment of type 2 diabetes, have been tested in models of neurodegenerative disease including AD and achieved good results...
March 22, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28336086/incretin-hormones-regulate-microglia-oxidative-stress-survival-and-expression-of-trophic-factors
#2
Lindsay Joy Spielman, Deanna Lynn Gibson, Andis Klegeris
The incretin hormones glucagon-like peptide (GLP)-1 and glucose-dependent insulinotropic polypeptide (GIP) are primarily known for their metabolic function in the periphery. GLP-1 and GIP are secreted by intestinal endocrine cells in response to ingested nutrients. Both GLP-1 and GIP stimulate the production and release of insulin from pancreatic β cells as well as exhibit several growth-regulating effects on peripheral tissues. GLP-1 and GIP are also present in the brain, where they provide modulatory and anti-apoptotic signals to neurons...
March 8, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28326744/nutritional-parameters-and-carbohydrate-and-fat-metabolism-after-prolonged-salsolinol-administration-in-rats-fed-normal-or-high-fat-diets
#3
Magdalena Kurnik-Lucka, Krzysztof Gil, Andrzej Bugajski, Agata Furgała, Piotr Thor
OBJECTIVES: Previous studies have reported that exogenous salsolinol might contribute to myenteric cell death and altered gastrointestinal motility. Because the entire gut mucosal, entero-endocrine and motor functions are integrated by the enteric nervous system, the aim of the present study was to investigate if prolonged intraperitoneal salsolinol administration alters basic metabolism and nutritional parameters in adult Wistar rats fed normal or high-fat diets. METHODS: Male Wistar rats were subjected to continuous intraperitoneal low dosing of salsolinol with ALZET osmotic mini-pumps for 2 or 4 weeks and fed either a normal or high-fat diet...
December 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28326339/glucose-dependent-insulinotropic-polypeptide-gip-and-gip-receptor-gipr-genes-an-association-analysis-of-polymorphisms-and-bone-in-young-and-elderly-women
#4
Gaurav Garg, Fiona E McGuigan, Jitender Kumar, Holger Luthman, Valeriya Lyssenko, Kristina Akesson
INTRODUCTION: The gastro-intestinal hormone glucose-dependent insulinotropic polypeptide (GIP) potentiates glucose-induced insulin secretion, with bone anabolic effects through GIP receptor (GIPR) in animal models. We explore its potential in humans by analyzing association between polymorphisms (SNPs) in the GIP and GIPR genes with bone phenotypes in young and elderly women. METHODS: Association between GIP (rs2291725) and GIPR (rs10423928) and BMD, bone mineral content (BMC), bone microarchitecture, fracture and body composition was analyzed in the OPRA (75y, n = 1044) and PEAK-25 (25y; n = 1061) cohorts and serum-GIP in OPRA...
June 2016: Bone Reports
https://www.readbyqxmd.com/read/28324023/long-chain-free-fatty-acid-receptor-gpr120-mediates-oil-induced-gip-secretion-through-cck-in-male-mice
#5
Akiko Sankoda, Norio Harada, Kanako Iwasaki, Shunsuke Yamane, Yuki Murata, Kimitaka Shibue, Yotsapon Thewjitcharoen, Kazuyo Suzuki, Takanari Harada, Yoshinori Kanemaru, Satoko Shimazu-Kuwahara, Akira Hirasawa, Nobuya Inagaki
Free fatty acid receptors GPR120 and GPR40 are involved in the secretion of gut hormones. GPR120 and GPR40 are expressed in enteroendocrine K-cells and their activation induces the secretion of the incretin glucose-dependent insulinotropic polypeptide (GIP). However, the role of these receptors in fat-induced GIP secretion in vivo and the associated mechanisms are unclear. In this study, we investigated corn oil-induced GIP secretion in GPR120-knockout (GPR120-/-) and GPR40-knockout (GPR40-/-) mice. Oil-induced GIP secretion was reduced by 50% and 80% in GPR120-/- and GPR40-/- mice compared to that in wild-type (WT) mice, respectively...
March 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28298900/the-impact-of-bariatric-surgery-on-type-2-diabetes-mellitus-and-the-management-of-hypoglycemic-events
#6
REVIEW
Mahmoud Attia Mohamed Kassem, Michael Andrew Durda, Nicoleta Stoicea, Omer Cavus, Levent Sahin, Barbara Rogers
Recent studies discussed the benefit of bariatric surgery on obese patients diagnosed with type 2 diabetes mellitus (T2DM). Several factors play an essential role in predicting the impact of bariatric surgery on T2DM, such as ABCD score (age, BMI, C-peptide, and duration of the disease), HbA1c, and fasting blood glucose, incretins [glucagon-like peptide-1 (GLP-1) and gastric inhibitory peptide (GIP)]. DiaRem score known to include factors such as age, HbA1c, medication, and insulin usage used to predict the remission of T2DM, but it has some limitations...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28295000/current-status-of-radiopharmaceuticals-for-the-theranostics-of-neuroendocrine-neoplasms
#7
REVIEW
Melpomeni Fani, Petra Kolenc Peitl, Irina Velikyan
Nuclear medicine plays a pivotal role in the management of patients affected by neuroendocrine neoplasms (NENs). Radiolabeled somatostatin receptor analogs are by far the most advanced radiopharmaceuticals for diagnosis and therapy (radiotheranostics) of NENs. Their clinical success emerged receptor-targeted radiolabeled peptides as an important class of radiopharmaceuticals and it paved the way for the investigation of other radioligand-receptor systems. Besides the somatostatin receptors (sstr), other receptors have also been linked to NENs and quite a number of potential radiolabeled peptides have been derived from them...
March 15, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28289509/perinatal-risk-factors-in-newborns-with-gastrointestinal-perforation
#8
Sandra Prgomet, Boris Lukšić, Zenon Pogorelić, Ivo Jurić, Vesna Čapkun, Adela Arapović, Nataša Boban
AIM: To investigate correlation of perinatal risk factors in newborns with gastrointestinal perforation (GIP). METHODS: Single-center retrospective cohort study was conducted between January 1990 and December 2012. Medical records on all newborns with GIP were reviewed (n = 35). Surgical records and histopathologic examination of all perforated intestine samples were also reviewed. RESULTS: The most common cause of GIP was necrotizing enterocolitis (51...
February 27, 2017: World Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28287413/the-effect-of-short-term-dietary-fructose-supplementation-on-gastric-emptying-rate-and-gastrointestinal-hormone-responses-in-healthy-men
#9
Adora M W Yau, John McLaughlin, Ronald J Maughan, William Gilmore, Gethin H Evans
This study aimed to examine gastric emptying rate and gastrointestinal hormone responses to fructose and glucose ingestion following 3 days of dietary fructose supplementation. Using the (13)C-breath test method, gastric emptying rates of equicaloric fructose and glucose solutions were measured in 10 healthy men with prior fructose supplementation (fructose supplement, FS; glucose supplement, GS) and without prior fructose supplementation (fructose control, FC; glucose control, GC). In addition, circulating concentrations of acylated ghrelin (GHR), glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP), and insulin were determined, as well as leptin, lactate, and triglycerides...
March 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28281233/common-channel-length-in-bypass-surgery-does-not-impact-t2dm-in-diabetic-zucker-rats
#10
Claudia Laessle, Sven Michelmichel, Goran Marjanovic, Simon Kuesters, Gabriel Seifert, Ulrich T Hopt, Jodok Matthias Fink
INTRODUCTION: Metabolic surgery is known to impact glucose tolerance but the exact mechanism is still unclear. Based on recently-published data, especially the role of the hindgut may require redefinition. METHODS: Either a loop duodeno-jejunostomy (DJOS) with exclusion of one third of total intestinal length, a loop duodeno-ileostomy (DiOS, exclusion of two thirds), or SHAM operation was performed in 9-week-old Zucker diabetic fatty rats. One, 3, and 6 months after surgery, an oral glucose tolerance test (OGTT) and glucose-stimulated hormone analyses were conducted...
March 9, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28271035/attenuated-secretion-of-glucose-dependent-insulinotropic-polypeptide-gip-does-not-alleviate-hyperphagic-obesity-and-insulin-resistance-in-ob-ob-mice
#11
Satoko Shimazu-Kuwahara, Norio Harada, Shunsuke Yamane, Erina Joo, Akiko Sankoda, Timothy J Kieffer, Nobuya Inagaki
OBJECTIVE: Glucose-dependent insulinotropic polypeptide (GIP) is released during meals and promotes nutrient uptake and storage. GIP receptor knockout mice are protected from diet induced weight gain and thus GIP antagonists have been proposed as a treatment for obesity. In this study, we assessed the role of GIP in hyperphagia induced obesity and metabolic abnormalities in leptin deficient (Lep(ob/ob)) mice. METHODS: We crossbred GIP-GFP knock-in homozygous mice (GIP(gfp/gfp)) that have complete GIP knockout, and mice heterozygous for the ob mutation (Lep(ob/+)) mice to generate Lep(ob/+)/GIP(+/+), Lep(ob/ob)/GIP(+/+), and Lep(ob/ob)/GIP(gfp/gfp) mice...
March 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28258126/effects-of-meal-and-incretins-in-the-regulation-of-splanchnic-blood-flow
#12
Jukka Koffert, Henri Honka, Jarmo Teuho, Saila Kauhanen, Saija Hurme, Riitta Parkkola, Vesa Oikonen, Andrea Mari, Andreas Lindqvist, Nils Wierup, Leif Groop, Pirjo Nuutila
OBJECTIVE: Meal ingestion is followed by a redistribution of blood flow (BF) within the splanchnic region contributing to nutrient absorption, insulin secretion and glucose disposal, but factors regulating this phenomenon in humans are poorly known. The aim of the present study was to evaluate the organ-specific changes in BF during a mixed-meal and incretin infusions. DESIGN: Non-randomized intervention study of 10 healthy adults to study splanchnic BF regulation...
March 3, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28250160/glucose-dependent-insulinotropic-polypeptide-receptor-deficiency-leads-to-impaired-bone-marrow-hematopoiesis
#13
Fernanda Dana Mantelmacher, Sigal Fishman, Keren Cohen, Metsada Pasmanik Chor, Yuichiro Yamada, Isabel Zvibel, Chen Varol
The bone marrow (BM) contains controlled specialized microenvironments, or niches, that regulate the quiescence, proliferation, and differentiation of hematopoietic stem and progenitor cells (HSPC). The glucose-dependent insulinotropic polypeptide (GIP) is a gut-derived incretin hormone that mediates postprandial insulin secretion and has anabolic effects on adipose tissue. Previous studies demonstrated altered bone microarchitecture in mice deficient for GIP receptor (Gipr(-/-) ), as well as the expression of high-affinity GIP receptor by distinct cells constructing the BM HSPC niche...
March 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28242789/tm6sf2-rs58542926-variant-affects-postprandial-lipoprotein-metabolism-and-glucose-homeostasis-in-nafld-a-clue-to-the-opposite-impact-of-tm6sf2-variant-on-liver-and-cardio-metabolic-disease
#14
Giovanni Musso, Ugo Cipolla, Maurizio Cassader, Silvia Pinach, Francesca Saba, Franco De Michieli, Elena Paschetta, Daria Bongiovanni, Luciana Framarin, Nicola Leone, Mara Berrutti, Floriano Rosina, Stefania Corvisieri, Federica Molinaro, Antonio Sircana, Roberto Gambino
Mechanisms underlying the opposite effects of TM6SF2 rs58542926 C>T polymorphism on liver injury and cardio-metabolic risk in NAFLD are unclear. We assessed the impact of this polymorphism on postprandial lipoprotein metabolism, glucose homeostasis, and nutrient oxidation in NAFLD. Sixty nonobese, nondiabetic, normolipidemic biopsy-proven NAFLD patients and 60 matched controls genotyped for TM6SF2 C>T polymorphism underwent: indirect calorimetry, an oral fat tolerance test with measurement of plasma lipoprotein subfractions, adipokines, incretin GIP, and an OGTT with Minimal Model analysis of glucose homeostasis...
February 27, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28242256/gastric-bypass-in-the-pig-increases-gip-levels-and-decreases-active-glp-1-levels
#15
Andreas Lindqvist, Mikael Ekelund, Stefan Pierzynowski, Leif Groop, Jan Hedenbro, Nils Wierup
Gastric bypass surgery results in remission of type 2 diabetes in the majority of patients. The incretin hormones glucagon-like peptide 1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) have been implicated in the observed remission. Most knowledge so far has been generated in obese subjects. To isolate the surgical effects of gastric bypass on metabolism and hormone responses from the confounding influence of obesity, T2D, or food intake, we performed gastric bypass in lean pigs, using sham-operated and pair-fed pigs as controls...
February 24, 2017: Peptides
https://www.readbyqxmd.com/read/28237651/gip-3-30-nh2-is-a-potent-competitive-antagonist-of-the-gip-receptor-and-effectively-inhibits-gip-mediated-insulin-glucagon-and-somatostatin-release
#16
A H Sparre-Ulrich, M N Gabe, L S Gasbjerg, C B Christiansen, B Svendsen, B Hartmann, J J Holst, M M Rosenkilde
Alternative processing of the precursor protein pro-GIP results in endogenously produced GIP(1-30)NH2, that by DPP-4 cleavage in vivo results in the metabolite GIP(3-30)NH2. We showed previously that GIP(3-30)NH2 is a high affinity antagonist of the human GIPR in vitro. Here we determine whether it is suitable for studies of GIP physiology in rats since effects of GIP agonists and antagonists are strictly species-dependent. Transiently transfected COS-7 cells were assessed for cAMP accumulation upon ligand stimulation or assayed in competition binding using human (125)I-GIP(1-42) as radioligand...
February 22, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28235848/patients-with-long-qt-syndrome-due-to-impaired-herg-encoded-kv11-1-potassium-channel-have-exaggerated-endocrine-pancreatic-and-incretin-function-associated-with-reactive-hypoglycemia
#17
Louise Hyltén-Cavallius, Eva W Iepsen, Nicolai J Wewer Albrechtsen, Mathilde Svendstrup, Anniek F Lubberding, Bolette Hartmann, Thomas Jespersen, Allan Linneberg, Michael Christiansen, Henrik Vestergaard, Oluf Pedersen, Jens J Holst, Jørgen K Kanters, Torben Hansen, Signe S Torekov
Background -Loss-of-function mutations in hERG (encoding the Kv11.1 voltage-gated potassium channel) cause long QT syndrome (LQT2) due to prolonged cardiac repolarization. However, Kv11.1 is also present in pancreatic α and β cells and intestinal L and K cells, secreting glucagon, insulin, and the incretins glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), respectively. These hormones are crucial for glucose regulation and LQTS may cause disturbed glucose regulation. We measured secretion of these hormones and cardiac repolarization in response to glucose ingestion in LQT2 patients with functional mutations in hERG and matched healthy participants, testing the hypothesis that LQT2 patients have increased incretin and β cell- and decreased α cell function and thus lower glucose levels...
February 24, 2017: Circulation
https://www.readbyqxmd.com/read/28223856/uncertainties-around-incretin-based-therapies-a-literature-review
#18
REVIEW
Bader Al Tulaihi, Samia Alhabib
Background: Diabetes mellitus is a chronic debilitating and non-communicable disease. It has several long-term outcomes that are associated with various end organ damage, mainly the heart, blood vessels, eyes, nerves, and kidneys. There are different modalities of treatment of diabetes. The recent incretin-based therapies provided an innovative class of drugs including GLP-1 receptor agonists and DPP-4 inhibitors. This review aims to summarize the available evidence of their effectiveness. Method: This is a narrative review...
January 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28223210/a-novel-glp-1-gip-dual-receptor-agonist-protects-from-6-ohda-lesion-in-a-rat-model-of-parkinson-s-disease
#19
Jaishree Jalewa, Mohit Kumar Sharma, Simon Gengler, Christian Hölscher
The incretins glucagon-like peptide 1 (GLP-1) and glucose dependent insulinotropic polypeptide (GIP) are growth factors that have shown neuroprotective effects in animal models of Parkinson's and Alzheimer's disease. In addition, the GLP-1 mimetic exendin-4 has shown protective effects in a clinical trial in Parkinson's disease (PD) patients. GLP-1 analogues are currently on the market as treatments for type II diabetes. We previously showed that the novel dual agonist (DA-JC1) was effective in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD...
February 20, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28216550/the-acute-effects-of-simple-sugar-ingestion-on-appetite-gut-derived-hormone-response-and-metabolic-markers-in-men
#20
Adora M W Yau, John McLaughlin, William Gilmore, Ronald J Maughan, Gethin H Evans
This pilot study aimed to investigate the effect of simple sugar ingestion, in amounts typical of common ingestion, on appetite and the gut-derived hormone response. Seven healthy men ingested water (W) and equicaloric solutions containing 39.6 g glucose monohydrate (G), 36 g fructose (F), 36 g sucrose (S), and 19.8 g glucose monohydrate + 18 g fructose (C), in a randomised order. Serum concentrations of ghrelin, glucose dependent insulinotropic polypeptide (GIP), glucagon like peptide-1 (GLP-1), insulin, lactate, triglycerides, non-esterified fatty acids (NEFA), and d-3 hydroxybutyrate, were measured for 60 min...
February 14, 2017: Nutrients
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