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Glucagon like peptide

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https://www.readbyqxmd.com/read/27913575/lowest-glucose-variability-and-hypoglycemia-are-observed-with-the-combination-of-a-glp-1-receptor-agonist-and-basal-insulin-variation-study
#1
Harpreet S Bajaj, Karri Venn, Chenglin Ye, Avril Patrick, Shivani Kalra, Hasnain Khandwala, Nadeem Aslam, David Twum-Barima, Ronnie Aronson
OBJECTIVE: There is a dearth of published literature comparing glucose variability (GV) between different insulin regimens in type 2 diabetes. This cohort study compares GV using continuous glucose monitoring (CGM) in patients with well-controlled type 2 diabetes using four common insulin regimens: basal insulin + oral drugs (BO), basal insulin + glucagon-like peptide 1 receptor agonist (GLP-1 RA) (BGLP), premixed insulin (PM), and basal-bolus insulin (BB). RESEARCH DESIGN AND METHODS: Consecutive patients from three endocrinology clinics who met study criteria-type 2 diabetes, age 18 to 80 years, BMI ≤ 45 kg/m(2), stable insulin regimen for a minimum of 6 months, and stable A1C value ≤7...
December 2, 2016: Diabetes Care
https://www.readbyqxmd.com/read/27911362/automated-acoustic-dispensing-for-the-serial-dilution-of-peptide-agonists-in-potency-determination-assays
#2
Jacqueline Naylor, Alessandra Rossi, Christopher Brankin, David C Hornigold
As with small molecule drug discovery, screening for peptide agonists requires the serial dilution of peptides to produce concentration-response curves. Screening peptides affords an additional layer of complexity as conventional tip-based sample handling methods expose peptides to a large surface area of plasticware, providing an increased opportunity for peptide loss via adsorption. Preventing excessive exposure to plasticware reduces peptide loss via adherence to plastics and thus minimizes inaccuracies in potency prediction, and we have previously described the benefits of non-contact acoustic dispensing for in vitro high-throughput screening of peptide agonists(1)...
November 10, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27908915/-the-hypothalamic-glucagon-like-peptide-1-glp-1-receptor-glp-1r-is-sufficient-but-not-necessary-for-the-regulation-of-energy-balance-and-glucose-homeostasis-in-mice
#3
Melissa A Burmeister, Jennifer E Ayala, Hannah Smouse, Adriana Landivar-Rocha, Jacob D Brown, Daniel J Drucker, Doris A Stoffers, Darleen A Sandoval, Randy J Seeley, Julio E Ayala
Pharmacological activation of the hypothalamic glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) promotes weight loss and improves glucose tolerance. This demonstrates that the hypothalamic GLP-1R is sufficient but does not show whether it is necessary for the effects of exogenous GLP-1R agonists (GLP-1RA) or endogenous GLP-1 on these parameters. To address this, we crossed mice harboring floxed Glp1r alleles to mice expressing Nkx2.1-Cre to knock down Glp1r expression throughout the hypothalamus (GLP-1RKD(ΔNkx2...
December 1, 2016: Diabetes
https://www.readbyqxmd.com/read/27906714/central-nervous-system-regulation-of-hepatic-lipid-and-lipoprotein-metabolism
#4
Jennifer Taher, Sarah Farr, Khosrow Adeli
PURPOSE OF REVIEW: Hepatic lipid and lipoprotein metabolism is an important determinant of fasting dyslipidemia and the development of fatty liver disease. Although endocrine factors like insulin have known effects on hepatic lipid homeostasis, emerging evidence also supports a regulatory role for the central nervous system (CNS) and neuronal networks. This review summarizes evidence implicating a bidirectional liver-brain axis in maintaining metabolic lipid homeostasis, and discusses clinical implications in insulin-resistant states...
November 30, 2016: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/27905899/a-case-of-extragastrointestinal-stromal-tumor-complicated-by-severe-hypoglycemia-a-unique-presentation-of-a-rare-tumor
#5
Zeb Saeed, Solaema Taleb, Carmella Evans-Molina
BACKGROUND: Non-Islet Cell Tumor Hypoglycemia (NICTH) is a rare paraneoplastic cause of hypoglycemia arising from excess tumor production of insulin-like growth factor. The objective of this report is to describe an unusual case of Extragastrointestinal Stromal Tumor (EGIST) associated NICTH. CASE PRESENTATION: A 64 year-old African female was brought to the emergency room with a 1-month history of recurrent syncope, weight loss, and abdominal bloating. Serum blood glucose was discovered to 39 mg/dL, when insulin, proinsulin, and C-peptide were suppressed...
December 1, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27904405/evaluation-of-prebiotic-effects-of-high-purity-galactooligosaccharides-in-vitro-and-in-vivo
#6
Ki Bae Hong, Jae Hwan Kim, Hyuk Kon Kwon, Sung Hee Han, Yooheon Park, Hyung Joo Suh
Galactooligosaccharides (GOS) are an important class of dietary prebiotics that exert beneficial effects on intestinal microbiota and gut barrier function. In this study, high-purity GOS (HP-GOS) were investigated in vitro and in vivo and confirmed as prebiotic ingredients in rat diet. HP-GOS were successfully produced using a two-step process, enzymatic hydrolysis and fermentation by yeast. They were found to serve as a good substrate and carbon source for supporting the growth of probiotic bacteria more effectively than other commercial GOS...
June 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27900077/selective-beneficial-cardiometabolic-effects-of-vertical-sleeve-gastrectomy-are-predominantly-mediated-through-glucagon-like-peptide-glp-1-in-zucker-diabetic-fatty-rats
#7
Sunil Kumar, Raymond Lau, Thomas Palaia, Christopher Hall, Jenny Lee, Keneth Hall, Collin E Brathwaite, Louis Ragolia
BACKGROUND: Glucagon-like peptide-1 (GLP-1) level was significantly increased post Vertical Sleeve Gastrectomy (VSG), an effect believed to contribute to its beneficial cardiometabolic effects. OBJECTIVE: To validate the beneficial GLP-1 mediated cardiometabolic effects post VSG using GLP-1 antagonist (exendin 9-39) in Zucker diabetic fatty rats. METHODS: Animals were divided into three (n = 5) groups: (i) sham, (ii) VSG, and (iii) VSG received exendin 9-39 (GLP-1 receptor antagonist)...
December 2016: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/27898425/modulation-of-microbiota-gut-brain-axis-by-berberine-resulting-in-improved-metabolic-status-in-high-fat-diet-fed-rats
#8
Honglin Sun, Ningjian Wang, Zhen Cang, Chaoxia Zhu, Li Zhao, Xiaomin Nie, Jing Cheng, Fangzhen Xia, Hualing Zhai, Yingli Lu
OBJECTIVE: To investigate whether or not berberine could improve metabolic status of high-fat-fed rats through modulation of microbiota-gut-brain axis. METHODS: Berberine was administered on high-fat-fed Sprague-Dawley rats. Brain-gut hormones were detected, and changes of gut microbiota were analyzed by 16S rRNA gene sequencing. RESULTS: Berberine could reduce weight gain and lipolysis in the high-fat diet-fed group. Moreover, trends of ameliorated insulin resistance and decreased endogenous glucose production were observed...
November 30, 2016: Obesity Facts
https://www.readbyqxmd.com/read/27898108/monotreme-glucagon-like-peptide-1-in-venom-and-gut-one-gene-two-very-different-functions
#9
Enkhjargal Tsend-Ayush, Chuan He, Mark A Myers, Sof Andrikopoulos, Nicole Wong, Patrick M Sexton, Denise Wootten, Briony E Forbes, Frank Grutzner
The importance of Glucagon like peptide 1 (GLP-1) for metabolic control and insulin release sparked the evolution of genes mimicking GLP-1 action in venomous species (e.g. Exendin-4 in Heloderma suspectum (gila monster)). We discovered that platypus and echidna express a single GLP-1 peptide in both intestine and venom. Specific changes in GLP-1 of monotreme mammals result in resistance to DPP-4 cleavage which is also observed in the GLP-1 like Exendin-4 expressed in Heloderma venom. Remarkably we discovered that monotremes evolved an alternative mechanism to degrade GLP-1...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27896683/population-pharmacokinetics-of-an-extended-release-formulation-of-exenatide-following-single-and-multiple-dose-administration
#10
Brenda Cirincione, Jeffrey Edwards, Donald E Mager
Exenatide is a glucagon-like peptide-1 receptor agonist with both immediate- and extended-release (ER) formulations that are approved for the treatment of type 2 diabetes mellitus. Long-term exposure from the ER formulation is achieved through slow peptide release from a degradable microsphere formulation. The goal of this analysis was to develop a pharmacokinetic model for the ER formulation following single and once-weekly multiple-dose administration. Pharmacokinetic data were collected from two clinical trials-one that evaluated single-dose administration of 2...
November 28, 2016: AAPS Journal
https://www.readbyqxmd.com/read/27895384/exendin-4-induces-extracellular-superoxide-dismutase-through-histone-h3-acetylation-in-human-retinal-endothelial-cells
#11
Hiroyuki Yasuda, Atsuko Ohashi, Shohei Nishida, Tetsuro Kamiya, Tetsuya Suwa, Hirokazu Hara, Jun Takeda, Yoshinori Itoh, Tetsuo Adachi
Extracellular-superoxide dismutase (genetic name SOD3) is a secreted anti-oxidative enzyme, and its presence in vascular walls may play an important role in protecting the vascular system against oxidative stress. Oxidative stress has been implicated in the pathogenesis of diabetic retinopathy; therefore, increases in extracellular-superoxide dismutase have been suggested to inhibit the progression of diabetic retinopathy. Incretin-based drugs such as glucagon-like peptide-1 receptor agonists are used in the treatment of type 2 diabetes...
November 2016: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/27894924/antidepressant-like-effects-exerted-by-the-intranasal-administration-of-a-glucagon-like-peptide-2-derivative-containing-cell-penetrating-peptides-and-a-penetration-accelerating-sequence-in-mice
#12
Sachie Sasaki-Hamada, Ryuji Nakamura, Yusuke Nakao, Toshiki Akimoto, Emi Sanai, Mio Nagai, Michiko Horiguchi, Chikamasa Yamashita, Jun-Ichiro Oka
The intracerebroventicular (i.c.v.) administration of glucagon-like peptide-2 (GLP-2) to rodents was shown to have antidepressant-like effects in imipramine-resistant depression-model mice. In order to utilize GLP-2 as a clinical treatment tool for depression, we herein focused on the intranasal delivery that is non-invasive approach, because the i.c.v. administration is invasive and impractical. In the present study, we prepared a GLP-2 derivative containing cell penetrating peptides (CPPs) and a penetration accelerating sequence (PAS) (PAS-CPPs-GLP-2) for the intranasal (i...
November 25, 2016: Peptides
https://www.readbyqxmd.com/read/27894787/safety-and-efficacy-of-liraglutide-treatment-in-japanese-type-2-diabetes-patients-after-acute-myocardial-infarction-a-non-randomized-interventional-pilot-trial
#13
Masataka Kajiwara, Atsushi Tanaka, Tomohiro Kawasaki, Koichi Nakao, Tomohiro Sakamoto, Shigeru Toyoda, Teruo Inoue, Nobuhiko Koga, Koichi Node
BACKGROUND: Glucagon-like peptide 1 analogs are expected to exert a cardio-protective action due to their effective glucose-lowering action and favorable potency on multifactorial metabolic pathways. However, the safety and tolerability of liraglutide treatment after a recent acute coronary syndrome (ACS) in Japanese patients with type 2 diabetes mellitus (T2DM) have yet to be fully established. METHODS: A total of eight T2DM patients were recruited within 2 weeks after the onset of a ST-elevation myocardial infarction (STEMI) followed by successful percutaneous coronary intervention (PCI)...
November 25, 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/27894746/roux-en-y-gastric-bypass-versus-calorie-restriction-support-for-surgery-per-se-as-the-direct-contributor-to-altered-responses-of-insulin-and-incretins-to-a-mixed-meal
#14
Johan Berggren, Andreas Lindqvist, Jan Hedenbro, Leif Groop, Nils Wierup
OBJECTIVE: To study the immediate effects of Roux-en-Y gastric bypass (RYGB) on glucose homeostasis, insulin, and incretin responses to mixed-meal tests compared with the effects of calorie restriction (CR). SETTING: University-affiliated bariatric surgery clinic. BACKGROUND: RYGB induces remission of type 2 diabetes (T2D) long before significant weight loss occurs. The time course and underlying mechanisms of this remission remain enigmatic...
September 28, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27890806/the-endocrine-disrupting-potential-of-monosodium-glutamate-msg-on-secretion-of-the-glucagon-like-peptide-1-glp-1-gut-hormone-and-glp-1-receptor-interaction
#15
Maeve Shannon, Brian Green, Gary Willars, Jodie Wilson, Natalie Matthews, Joanna Lamb, Anna Gillespie, Lisa Connolly
Monosodium glutamate (MSG) is a suspected obesogen with epidemiological evidence positively correlating consumption to increased body mass index and higher prevalence of metabolic syndrome. ELISA and high content analysis (HCA) were employed to examine the disruptive effects of MSG on the secretion of enteroendocrine hormone glucagon-like peptide-1 (GLP-1) and GLP-1 receptor (GLP-1R), respectively. Following 3h MSG exposure of the enteroendocrine pGIP/neo: STC-1 cell line model (500μg/ml) significantly increased GLP-1 secretion (1...
November 24, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27889414/changes-in-glucose-induced-plasma-active-glucagon-like-peptide-1-levels-by-co-administration-of-sodium-glucose-cotransporter-inhibitors-with-dipeptidyl-peptidase-4-inhibitors-in-rodents
#16
Takahiro Oguma, Chiaki Kuriyama, Keiko Nakayama, Yasuaki Matsushita, Kumiko Hikida, Minoru Tsuda-Tsukimoto, Akira Saito, Kenji Arakawa, Kiichiro Ueta, Masabumi Minami, Masaharu Shiotani
We investigated whether structurally different sodium-glucose cotransporter (SGLT) 2 inhibitors, when co-administered with dipeptidyl peptidase-4 (DPP4) inhibitors, could enhance glucagon-like peptide-1 (GLP-1) secretion during oral glucose tolerance tests (OGTTs) in rodents. Three different SGLT inhibitors-1-(β-d-Glucopyranosyl)-4-chloro-3-[5-(6-fluoro-2-pyridyl)-2-thienylmethyl]benzene (GTB), TA-1887, and canagliflozin-were examined to assess the effect of chemical structure. Oral treatment with GTB plus a DPP4 inhibitor enhanced glucose-induced plasma active GLP-1 (aGLP-1) elevation and suppressed glucose excursions in both normal and diabetic rodents...
October 28, 2016: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/27889301/glycemic-control-and-weight-outcomes-for-exenatide-once-weekly-versus-liraglutide-in-patients-with-type-2-diabetes-a-1-year-retrospective-cohort-analysis
#17
Carrie McAdam-Marx, Hiep Nguyen, Marisa B Schauerhamer, Mukul Singhal, Sudhir Unni, Xiangyang Ye, David Cobden
PURPOSE: Data comparing real-world effectiveness of the glucagon-like peptide-1 receptor agonists (GLP-1RAs) exenatide once weekly (QW) and liraglutide in the treatment of type 2 diabetes (T2D) are limited. Furthermore, there is limited information on exenatide QW or liraglutide response by glycemic control and insulin use status. This study identifies 1-year glycosylated hemoglobin (HbA1c) and weight outcomes with exenatide QW and liraglutide in the real-world setting overall and in insulin-naive patients with uncontrolled T2D...
November 23, 2016: Clinical Therapeutics
https://www.readbyqxmd.com/read/27888738/oxyntomodulin-analog-and-exendin-4-derivative-lower-plasma-glucose-in-cattle
#18
S ThanThan, Y Asada, T Saito, K Ochiiwa, H Zhao, S W Naing, H Kuwayama
The present study was undertaken with the aim of examining whether and how exendin-4 (1-3) fragment, ie, Ex-4 (1-3) fragment, contributes to the regulation of glucose. An analog of oxyntomodulin (OXM) ([Gly(2), Glu(3)]-OXM), a glucagon analog ([Gly(2), Glu(3)]-glucagon), and two derivatives of Ex-4 (glucandin and [Gly(2), Glu(3)]-glucandin) were synthesized by substituting with Gly(2), Glu(3) at the N-terminuses of OXM and glucagon and/or by attaching Ex-4 (30-39) amide at the C-terminus of glucagon. Effects of these peptides on plasma insulin and glucose concentrations were investigated in cattle by conducting 3 in vivo experiments...
November 2, 2016: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/27887857/a-potential-contribution-of-dipeptidyl-peptidase-4-by-the-mediation-of-monocyte-differentiation-in-the-development-and-progression-of-abdominal-aortic-aneurysms
#19
Hsin-Ying Lu, Chun-Yao Huang, Chun-Ming Shih, Yi-Wen Lin, Chein-Sung Tsai, Feng-Yen Lin, Chun-Che Shih
OBJECTIVE: Abdominal aortic aneurysms (AAAs) are characterized by the destruction of elastin and collagen in the media and adventitia. Dipeptidyl peptidase-4 (DPP-4, an adipokine known as CD26) influences cell signaling, cell-matrix interactions, and the regulation of the functional activity of incretins in metabolic and inflammatory disorders. Although the role of DPP-4 in AAA evolution has been demonstrated, the underlying mechanisms of DPP-4-regulated AAA development remains unknown...
November 22, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27884496/glucagon-like-peptide-1-and-its-receptor-agonists-their-roles-in-management-of-type-2-diabetes-mellitus
#20
REVIEW
Ankit Gupta, Herbert F Jelinek, Hayder Al-Aubaidy
This study summarizes major work which investigated the roles of glucagon like peptide-1 (GLP-1) and its receptor (GLP-1R); the use of GLP-1-R agonists and dipeptidyl peptidase 4 inhibitor in the management of type 2 diabetes mellitus. It focuses on the recent therapeutic development which has occurred in this field, and also discusses the potential treatments which can be discovered and implemented in the near future to design an effective therapy for type 2 diabetes mellitus.
September 15, 2016: Diabetes & Metabolic Syndrome
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