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PMID |
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1 |
9357813
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Because experimental diabetes is associated with bowel growth, we examined the relationship between GLP-2 and intestinal growth in rats made diabetic by streptozotocin (STZ) injection and treated with or without insulin for 3 wk.
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2 |
9357813
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Ileal concentrations of the intestinal proglucagon-derived peptides, i.e., glicentin + oxyntomodulin, and GLPs 1 and 2, were increased by 57 +/- 20% above those of controls in untreated STZ diabetes (P < 0.05-0.001).
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3 |
9357813
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Insulin therapy prevented the changes in plasma GLP-2 and intestinal mass seen in untreated STZ diabetes.
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4 |
9928027
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As a therapeutic principle, the insulinotropic peptide, GLP-1, of the secretin-glucagon family of peptides, has turned out to possess some remarkably attractive properties, including the capability of normalizing blood glucose concentrations in patients with non-insulin-dependent diabetes mellitus and promoting satiety and reducing food intake in healthy volunteers.
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5 |
9928027
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Some possible avenues for circumventing these difficulties are the development of DPP-IV-resistant analogs, the inhibition of DPP-IV, enhancement of GLP-1 secretion, GLP delivery systems using continuous subcutaneous infusion or buccal tablets, GLP-1 absorption, and orally active, stable analogs.
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6 |
10024091
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Recently, it was reported that GLP-1 became resistant to DPPIV when the alanine residue at position 8 was replaced by a glycine (GLP-1-Gly8).
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7 |
10024091
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We report here that this change slightly decreased the affinity of the peptide for its receptor (IC50, 0.41 +/- 0.14 and 1.39 +/- 0.61 nmol/L for GLP-1 and GLP-1-Gly8, respectively) but did not change the efficiency to stimulate accumulation of intracellular cyclic adenosine monophosphate (cAMP) (EC50, 0.25 +/- 0.05 and 0.36 +/- 0.06 nmol/L for GLP-1 and GLP-1-Gly8, respectively).
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8 |
10516149
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The biological importance of glucagon, glucagon-like peptide (GLP)-1, and GLP-2 has engendered considerable interest in the factors regulating the synthesis and secretion of the PGDPs in vivo.
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9 |
10571117
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Immunocytochemical evidence for a paracrine interaction between GIP and GLP-1-producing cells in canine small intestine.
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10 |
10571117
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We have recently demonstrated that glucose-dependent insulinotropic peptide (GIP) stimulated GLP-1 secretion from canine ileal L cells in culture.
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11 |
10905482
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Insulinotropic glucagon-like peptide 1 agonists stimulate expression of homeodomain protein IDX-1 and increase islet size in mouse pancreas.
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12 |
10905482
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Here, we show that the insulinotropic hormone glucagon-like peptide (GLP)-1, which is produced by the intestine, enhances the pancreatic expression of the homeodomain transcription factor IDX-1 that is critical for pancreas development and the transcriptional regulation of the insulin gene.
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13 |
10905482
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Concomitantly, GLP-1 administered to diabetic mice stimulates insulin secretion and effectively lowers their blood sugar levels.
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14 |
10905482
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Thus, in addition to stimulating insulin secretion, GLP-1 stimulates the expression of the transcription factor IDX-1 while stimulating beta-cell neogenesis and may thereby be an effective treatment for diabetes.
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15 |
11262390
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Glucagon-like peptide (GLP)-2 action in the murine central nervous system is enhanced by elimination of GLP-1 receptor signaling.
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16 |
11262390
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We studied the sites of endogenous GLP-2 receptor (GLP-2R) expression, the localization of transgenic LacZ expression under the control of the mouse GLP-2R promoter, and the actions of GLP-2 in the murine CNS.
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17 |
11262390
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Disruption of glucagon-like peptide-1 receptor (GLP-1R) signaling with the antagonist exendin-(9-39) in wild-type mice or genetically in GLP-1R(-)/- mice significantly potentiated the anorectic actions of GLP-2.
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18 |
11262390
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These findings illustrate that CNS GLP-2R expression is not restricted to hypothalamic nuclei and demonstrate that the anorectic effects of GLP-2 are transient and modulated by the presence or absence of GLP-1R signaling in vivo.
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19 |
11978643
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Acute suppression of dipeptidyl peptidase IV (DPP-IV) activity improves glucose tolerance in the Zucker fatty rat, a rodent model of impaired glucose tolerance, through stabilization of glucagon-like peptide (GLP)-1.
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20 |
12049785
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We show here that these cells express islet amyloid polypeptide and prohormone convertase 1/3 (PC1/3), proteins that are not expressed by mature alpha cells, but are found in beta cells.
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21 |
12049785
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PC1/3 converts proglucagon to the functionally distinct hormones glucagon-like peptide (GLP)-1 and GLP-2 rather than glucagon.
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22 |
12049785
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Despite these differences, the early proglucagon-positive cells express, as do mature alpha cells, the POU domain transcription factor Brn-4, and do not express the beta cell factor pdx-1.
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23 |
12792820
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Hence, we compared the effects of glucagon, glucagon-like peptide (GLP)-1 and GLP-2 on basal and ACTH-stimulated secretion of dispersed adrenocortical cells from normal and STZ-induced diabetic rats.
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24 |
12792820
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In normoglycemic rats, glucagon increased basal aldosterone and corticosterone secretion from ZG and ZF/R cells, GLP-2 raised both basal and ACTH-stimulated aldosterone secretion and ACTH-stimulated corticosterone output, and EX4 increased basal corticosterone secretion.
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25 |
12792820
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It is suggested that the prolonged exposure to low concentrations of insulin causes unresponsiveness of adrenocortical cells to glucagon, GLP-2 and EX4, which may contribute to the hyporeninemic hypoaldosteronism and alterations in glucocorticoid metabolism occurring in experimental diabetes.
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26 |
15331566
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A recombinant human glucagon-like peptide (GLP)-1-albumin protein (albugon) mimics peptidergic activation of GLP-1 receptor-dependent pathways coupled with satiety, gastrointestinal motility, and glucose homeostasis.
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27 |
15331566
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We report that Albugon, a human glucagon-like peptide (GLP)-1-albumin recombinant protein, activates GLP-1 receptor (GLP-1R)-dependent cAMP formation in BHK-GLP-1R cells, albeit with a reduced half-maximal concentration (EC(50)) (0.2 vs. 20 nmol/l) relative to the GLP-1R agonist exendin-4.
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28 |
15331566
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Albugon decreased glycemic excursion and stimulated insulin secretion in wild-type but not GLP-1R(-/-) mice and reduced food intake after both intracerebroventricular and intraperitoneal administration.
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29 |
15331566
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A recombinant human glucagon-like peptide (GLP)-1-albumin protein (albugon) mimics peptidergic activation of GLP-1 receptor-dependent pathways coupled with satiety, gastrointestinal motility, and glucose homeostasis.
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30 |
15331566
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We report that Albugon, a human glucagon-like peptide (GLP)-1-albumin recombinant protein, activates GLP-1 receptor (GLP-1R)-dependent cAMP formation in BHK-GLP-1R cells, albeit with a reduced half-maximal concentration (EC(50)) (0.2 vs. 20 nmol/l) relative to the GLP-1R agonist exendin-4.
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31 |
15331566
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Albugon decreased glycemic excursion and stimulated insulin secretion in wild-type but not GLP-1R(-/-) mice and reduced food intake after both intracerebroventricular and intraperitoneal administration.
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32 |
15642594
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We transfected these cells with a plasmid encoding a mutated form of GLP-1 (GLP-1-Gly8), which is resistant to the degrading enzyme dipeptidyl-peptidase IV.
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33 |
16174875
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Moreover, glucagon-like peptide (GLP)-1 and GLP-2 receptor agonists appear to be promising therapies for the treatment of type 2 diabetes and intestinal disorders, respectively.
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34 |
17192476
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Exendin (Ex)-4 is an agonist of the glucagon-like peptide (GLP)-1 receptor (GLP-1r) that has anorexigenic and fat-reducing properties.
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35 |
17192476
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Suppression of ghrelin was neither mimicked by GLP-1(7-36)-NH(2) nor blocked by the GLP-1r antagonist Ex-(9-39).
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36 |
17192476
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The decrease in ghrelin levels induced by Ex-4 may explain the reduced food intake in fasted rats, justifying the more potent anorexigenic effects of Ex-4 when compared with GLP-1.
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37 |
17315241
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Comparison of the anti-diabetic effects of GIP- and GLP-1-receptor activation in obese diabetic (ob/ob) mice: studies with DPP IV resistant N-AcGIP and exendin(1-39)amide.
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38 |
18039776
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Gastrointestinal hormones including gastric inhibitory polypeptide (GIP), glucagon-like peptide (GLP)-1, and GLP-2 are secreted immediately after meal ingestion, and GIP and GLP-2 have been shown to regulate bone turnover.
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39 |
18039776
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We investigated the role of GLP-1 in the regulation of bone metabolism using GLP-1 receptor knockout (Glp-1r(-/-)) mice.
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40 |
18039776
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Although GLP-1 had no direct effect on osteoclasts and osteoblasts, Glp-1r(-/-) mice exhibited higher levels of urinary deoxypyridinoline, a marker of bone resorption, and reduced levels of calcitonin mRNA transcripts in the thyroid.
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41 |
18039776
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Moreover, calcitonin treatment effectively suppressed urinary levels of deoxypyridinoline in Glp-1r(-/-), mice and the GLP-1 receptor agonist exendin-4 increased calcitonin gene expression in the thyroid of wild-type mice.
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42 |
20589757
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SREBP-1c, Pdx-1, and GLP-1R involved in palmitate-EPA regulated glucose-stimulated insulin secretion in INS-1 cells.
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43 |
20589757
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Furthermore, palmitate was found to up-regulate the expression level of sterol regulatory element-binding protein (SREBP)-1c and down-regulate the levels of pancreatic and duodenal homeobox (Pdx)-1 and glucagon-like peptide (GLP)-1 receptor (GLP-1R) in INS-1 cells.
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44 |
20589757
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It was found that palmitate failed to suppress the expression of Pdx-1 and GLP-1R in SREBP-1c-deficient INS-1 cells.
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45 |
20589757
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Moreover, down-regulation of Pdx-1 could cause the low expression of GLP-1R with/without palmitate treatment.
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46 |
21734532
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MEDLINE was searched (May 2009-January 1, 2011) for articles in English, using the terms liraglutide, NN2211, incretin mimetic, glucagon-like peptide (GLP)-1, and GLP-1 receptor agonist.
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47 |
22719048
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Nutrient-stimulated glucagon-like peptide (GLP)-1, GLP-2, and peptide YY excursions were greater in VSG-operated animals.
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48 |
22719048
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VSG surgery resulted in decreased fasting plasma insulin, ghrelin and lipid concentrations, and markedly higher fasting plasma adiponectin and bile acid concentrations, independent of body weight.
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49 |
22719048
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This is potentially mediated by increases of circulating bile acids, adiponectin, and nutrient-stimulated GLP-1 secretion and decreased circulating ghrelin concentrations.
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50 |
22804451
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Cardiovascular effects of GLP-1 and GLP-1-based therapies: implications for the cardiovascular continuum in diabetes?
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51 |
22832924
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Natriuretic effect by exendin-4, but not the DPP-4 inhibitor alogliptin, is mediated via the GLP-1 receptor and preserved in obese type 2 diabetic mice.
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52 |
22832924
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Activation of the glucagon-like peptide (GLP)-1 receptor (GLP-1R) and inhibition of dipeptidyl peptidase-4 (DPP-4) are new antidiabetic strategies.
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53 |
22832924
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The GLP-1R and DPP-4 are also expressed in the renal proximal tubular brush border, where they may regulate Na(+) reabsorption.
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54 |
22832924
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DPP-4 cleaves and inactivates GLP-1; thus the natriuretic effect of DPP-4 inhibition may be mediated by the GLP-1R.
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55 |
22832924
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These effects were absent in mice lacking the GLP-1R and independent of adenylyl cyclase 6.
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56 |
22832924
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In comparison, parenteral application of the DPP-4 inhibitor alogliptin reduced plasma DPP-4 activity by 95% and induced a diuresis and natriuresis independent of the presence of the GLP-1R or changes in phosphorylated NHE3.
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57 |
23296071
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Preclinical data and mechanistic studies have indicated a possible beneficial action on blood vessels and the heart, via both glucagon-like peptide 1 (GLP-1)-dependent and GLP-1-independent effects.
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58 |
23418362
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Tissue-specific processing of proglucagon yields the peptide hormones glucagon in the alpha cell and glucagon-like peptide (GLP)-1 and GLP-2 in L cells.
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59 |
23418362
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In Neuro 2a cells that lacked CPE, PC1/3 and PC2, proglucagon co-localised with the Golgi marker p115 as determined by quantitative immunofluorescence microscopy.
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60 |
23418362
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Expression of CPE, but not of PC1/3 or PC2, enhanced proglucagon sorting to granules. siRNA-mediated knockdown of CPE disrupted regulated secretion of glucagon from pancreatic-derived alphaTC1-6 cells, but not of GLP-1 from intestinal cell-derived GLUTag cells.
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