Effects of an Apple Extract on Glycaemia: The GLU-Pomme Study
Summary
Postprandial hyperglycaemia can lead to adverse modifications to functional proteins within the body and eventually lead to the development of type 2 diabetes. Previous research by this group has shown that an apple polyphenol extract reduced hyperglycaemia following a high-carbohydrate meal. The aim of this study is to investigate the effects of lower doses of the apple extract on postprandial glycaemia, insulinaemia and plasma gastric inhibitory polypeptide concentrations following a mixed carbohydrate test meal.
Description
Introduction:
Sharp peaks in blood glucose levels can lead to adverse modifications to functional proteins, oxidative stress and pancreatic beta cell dysfunction. It is therefore desirable to consume a diet that will allow more gradual rises in blood glucose levels after meals. Fruit polyphenols may help to limit the glucose excursion following a high carbohydrate meal. Previous research by this research group has demonstrated that 1200 mg of apple polyphenols (Appl'In™) inhibited the average incremental area under the curve (T+0 to T+30 min) of plasma glucose by 54% relative to placebo. Possible mechanisms include inhibition of intestinal enzymes and inhibition of intestinal glucose absorption by decreasing SGLT1/GLUT2 transport activity. The literature also suggests that foods rich in polyphenols exert beneficial effects on risk factors of cardiovascular disease such as hypertension, lipid metabolism and vascular function.
Study design:
A randomised, controlled, double-blind, cross-over study will be conducted. Four matched test drinks will be consumed in random order on separate study visits immediately before a mixed-carbohydrate test meal, containing either: 1) 1.2 g, 2) 0.9 g 3). 0.6 g of apple polyphenols, or 4). placebo. Postprandial changes in plasma glucose, insulin, NEFA, GIP, GLP-1 concentrations as well as changes in vascular function. Twenty-four hour urine samples will be collected for analysis of urinary polyphenol metabolites and glucose. In a sub sample of participants, a paracetamol absorption test will be incorporated via addition of 1.5 g paracetamol into the test drink.
Study Design
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Prevention
Conditions
Prevention of Hyperglycaemia
Intervention
Apple polyphenols, Placebo
Location
Metabolic Research Unit at King's College London
Waterloo Campus
London
United Kingdom
SE1 9NH
Status
Not yet recruiting
Source
King's College London
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT02940249
- ClinicalTrials.gov processed this data on October 20, 2016
Published on BioPortfolio: 2016-10-21T04:08:21-0400
Clinical Trials
Apple polyphenols are mostly acknowledged for their hypoglycaemic properties, but represent an apple active fraction with many pharmacological functions. The study aim was to examine their...
Bioavailability and Vascular Effects of Apple Polyphenols
The main purpose of this study is to determine the oral bioavailability of flavanols (polyphenolic compounds) from apple granules and an apple extract delivered in a water based beverage ...
Grape and Pomegranate Polyphenols in Postprandial Glucose and Related Parameters
The aim of this is study is to evaluate the acute effect of grape and pomegranate polyphenols in the modulation of markers of metabolic syndrome. Most of the previous works about polypheno...
Polyphenols and Endothelial Function
To determine whether fruit juice rich in polyphenols might increase exercise capacity and memory in healthy sedentary subjects.Both parameters might be improved because of the anti-oxidant...
Grape Pomace Polyphenols and Cardiometabolic Risk
The aim of this is study is to evaluate the long-term effects of grape polyphenols in the modulation of markers of metabolic syndrome. Most of the previous works about polyphenols have onl...
PubMed Articles
Dyslipidaemia is a risk factor for arteriosclerosis. Recent studies have shown that dyslipidaemia is effectively prevented by various polyphenols. In this clinical study (UMIN trial: 000024028), we ev...
Weight Loss Associated With Consumption of Apples: A Review.
Apples are known as a major source of polyphenols, dietary fiber, carotenoids, and other nutrients. There are many documents and studies that show fruit polyphenols likely promote anti-obesity effects...
To assess the effectiveness of the implementation of a protocol for glycaemic control in critical care, in terms of maintenance of a pre-established target of blood glucose level, reduction of hypergl...
Enhancement of Apple Coloration Using Jasmonate Treatment without Sacrificing Storage Potential.
Apple coloration is very important for most cultivars. The application of jasmonate can effectively enhance the coloration of apple fruit, but it might ruin the fruit's storage potential. Here, we rep...
Stability of dietary polyphenols: It's never too late to mend?
We have comprehensively investigated the structure-stability relationship of natural polyphenols in DMEM medium without cells. Polyphenols with catechol or pyrogallol structure were evidently instable...
Medical and Biotech [MESH] Definitions
Primary Prevention
Specific practices for the prevention of disease or mental disorders in susceptible individuals or populations. These include HEALTH PROMOTION, including mental health; protective procedures, such as COMMUNICABLE DISEASE CONTROL; and monitoring and regulation of ENVIRONMENTAL POLLUTANTS. Primary prevention is to be distinguished from SECONDARY PREVENTION and TERTIARY PREVENTION.
Secondary Prevention
The prevention of recurrences or exacerbations of a disease that already has been diagnosed. This also includes prevention of complications or after-effects of a drug or surgical procedure.
Rivaroxaban
A morpholine and thiophene derivative that functions as a FACTOR XA INHIBITOR and is used in the treatment and prevention of DEEP-VEIN THROMBOSIS and PULMONARY EMBOLISM. It is also used for the prevention of STROKE and systemic embolization in patients with non-valvular ATRIAL FIBRILLATION, and for the prevention of atherothrombotic events in patients after an ACUTE CORONARY SYNDROME.
Polyphenols
A large class of organic compounds having more than one PHENOL group.
Therapeutic Misconception
Misunderstanding among individuals, frequently research subjects, of scientific methods such as randomization and placebo controls.
