Blood Glucose Clinical Trial
Official title:
Study of the Effect of Lactisole on the Responses to Intragastric Glucose Solution
The purpose of the study is to determine whether the sweet taste receptors in the gut are involved in sensing sweet substances and controlling appetite and the amount we eat. Lactisole is a substance commonly used in food products to reduce the perceived sweetness of certain sugars and sweeteners. The aim of this study is to investigate whether the responses to a glucose solution, intragastrically administered to healthy male and female volunteers, is affected by the presence of lactisole in the gut. Understanding the mechanisms by which nutrients are initially detected in the gut and how they influence food intake is critical to the development of novel food products that could reduce food consumption.
Status | Recruiting |
Enrollment | 24 |
Est. completion date | May 2011 |
Est. primary completion date | May 2011 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 18 Years to 45 Years |
Eligibility |
Inclusion Criteria: - Aged between 18-45 years - BMI between 18-25kg/m2 - General good health Exclusion Criteria: - Underweight or Overweight (Body Mass Index <19 or >25 kg.m-2) - Females who are pregnant or breastfeeding - Currently taking medication (except females taking oral contraceptive) - Smokers - Currently dieting or have experienced a weight change +/- 3kg in past 6 months - Metabolic disorders (eg. Type 2 diabetes) - History of gastrointestinal disorders - Participation in other research in past 3 months |
Allocation: Randomized, Intervention Model: Crossover Assignment, Masking: Single Blind (Subject), Primary Purpose: Basic Science
Country | Name | City | State |
---|---|---|---|
United Kingdom | Salford Royal NHS Foundation Trust | Manchester |
Lead Sponsor | Collaborator |
---|---|
Salford Royal NHS Foundation Trust | University of Manchester |
United Kingdom,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Blood glucose | Blood samples will be collected at baseline and 5, 15 and 30 minute intervals until 150 minutes after the glucose infusion | No | |
Secondary | Subjective appetite ratings | Participants will be asked to complete visual analogue scale questionnaire (VAS) up to a total of 6 times for the duration of each study | 30 minute intervals | No |
Secondary | Gastric emptying rate | In order to assess gastric emptying, a stable isotope of carbon, in the form of 13Csodium acetate will be added to the test meal. This is absorbed only once it has passed through the stomach into the duodenum. It is then metabolised and exhaled in the breath as 13Clabelled carbon dioxide (CO2) where it can be measured. | Breath samples are collected at 5, 15 and 30 minute intervals up to a total of 10 times until 150 minutes | No |
Secondary | Energy intake | Energy intake will be assessed by an ad libitum test meal provided at the end of each study and food diaries completed for the remainder of the day | No | |
Secondary | Gut hormones | Blood samples will be processed to examine hormone levels of GLP-1, PYY, and insulin. | Blood samples will be collected at baseline, 5, 15 and 30 minute intervals until 150 minutes after glucose infusion. | No |
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