As a regulator of food intake and energy metabolism, the role of ghrelin in glucose metabolism is still not fully understood. In this study, we determined the in vivo effect of ghrelin on incretin effect. We demonstrated that ghrelin inhibited the glucose-stimulated release of glucagon-like peptide-1 (GLP-1) when infused into the portal vein of Wistar rat. Hepatic vagotomy diminished the inhibitory effect of ghrelin on glucose-stimulated GLP-1 secretion. In addition, phentolamine, a nonselective α receptor antagonist, could recover the decrease of GLP-1 release induced by ghrelin infusion. Pralmorelin (an artificial growth hormone release peptide) infusion into the portal vein could also inhibit the glucose-stimulated release of GLP-1. And growth hormone secretagogue receptor antagonist, [D-lys3]-GHRP-6, infusion showed comparable increases of glucose stimulated GLP-1 release compared to ghrelin infusion into the portal vein. The data showed that intraportal infusion of ghrelin exerted an inhibitory effect on GLP-1 secretion through growth hormone secretagogue receptor 1α (GHS1α receptor), which indicated that the downregulation of ghrelin secretion after food intake was necessary for incretin effect. Furthermore, our results suggested that the enteric neural net involved hepatic vagal nerve and sympathetic nerve mediated inhibition effect of ghrelin on incretin effect.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4160649 | PMC |
| http://dx.doi.org/10.1155/2014/923564 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
ACUTE HYPERGLYCEMIA INDUCES PODOCYTE APOPTOSIS BY MONOCYTE TNF-α RELEASE, A PROCESS ATTENUATED BY VITAMIN D AND GLP-1 RECEPTOR AGONISTS.
J Steroid Biochem Mol Biol
January 2025
Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Medicine, VA Medical Center, St. Louis, MO, USA; Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, MO, USA. Electronic address:
Targeting optimal glycemic control based on hemoglobin A1c (A1c) values reduces but does not abolish the onset of diabetic kidney disease and its progression to chronic kidney disease (CKD). This suggests that factors other than the average glucose contribute to the residual risk. Vitamin D deficiency and frequent episodes of acute hyperglycemia (AH) are associated with the onset of albuminuria and CKD progression in diabetes.
View Article and Find Full Text PDFIntestinal glucagon-like peptide-1: A new regulator of impaired counterregulatory responses to hypoglycemia in type 1 diabetes mellitus.
World J Diabetes
January 2025
Department of Gastroenterology, The First People's Hospital of Foshan, Foshan 528000, Guangdong Province, China.
In this article, we review the study by Jin , which examined the role of intestinal glucagon-like peptide-1 (GLP-1) in counterregulatory responses to hypoglycemia in patients with type 1 diabetes mellitus (T1DM). With the global rise of T1DM, there is an increased burden on society and healthcare systems. Due to insulin therapy and islet dysfunction, T1DM patients are highly vulnerable to severe hypoglycemia, a leading cause of mortality.
View Article and Find Full Text PDFThe Effects of Glucagon-Like Peptide-1 Receptor Agonists on Mitochondrial Function Within Skeletal Muscle: A Systematic Review.
J Cachexia Sarcopenia Muscle
February 2025
Department of Cardiovascular Sciences, College of Life Sciences, University of Leicester, Leicester, UK.
Background: Obesity is a chronic disease associated with increased risk of multiple metabolic and mental health-related comorbidities. Recent advances in obesity pharmacotherapy, particularly with glucagon-like peptide-1 (GLP-1) receptor agonists (RAs), have the potential to transform obesity and type 2 diabetes mellitus (T2DM) care by promoting marked weight loss, improving glycaemic control and addressing multiple obesity-related comorbidities, with added cardio-renal benefits. Dual agonists combining GLP-1 with other enteropancreatic hormones such as glucose-dependent insulinotropic polypeptide (GIP) have also been developed in recent years, leading to greater weight loss than using GLP-1 RAs alone.
View Article and Find Full Text PDFEffect of long-term negative energy on appetite hormone levels in individuals with prediabetes and diabetes.
Rev Assoc Med Bras (1992)
January 2025
Yalova University, Faculty of Medicine, Department of Medical Biochemistry, AD - Yalova, Turkey.
Objective: Calorie restriction and exercise are commonly used first interventions to prevent the progression of prediabetes and alleviate the symptoms of type 2 diabetes. Our study was designed to determine the effect of the energy deficit caused by long-term (12-week) calorie restriction and exercise programs on appetite responses in obese individuals with prediabetes and type 2 diabetes.
Methods: Calorie restriction and exercise programs appropriate for age, gender, and work environment were applied to 22 individuals with prediabetes and 22 with type 2 diabetes participating in the study for a period of 12 weeks.
Glucagon-like peptide 1 receptor agonists outperform basal insulin in cardiovascular and renal outcomes for type 2 diabetes mellitus: a retrospective cohort study.
Acta Diabetol
January 2025
Division of Cardiology, Department of Internal Medicine, New Taipei Municipal TuCheng Hospital, New Taipei, Taiwan.
Purpose: Glucagon-like peptide 1 (GLP-1) receptor agonists (RAs) and basal insulin are currently used in the treatment of type 2 diabetes mellitus (T2DM) as long-acting injectables. In this study, we aimed to compare the cardiovascular (CV) and renal outcomes of GLP-1 RAs and basal insulin treatment in patients with T2DM.
Method: We conducted a propensity score-matched cohort study of patients from Chang Gung Memorial Hospital institutions between 2013 and 2021.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!