Healthy Subjects, Type 1 Diabetes (T1D)
Conditions
Keywords
Type 1 Diabetes, Artificial Pancreas, Artificial Sweeteners, Non-Nutritive Sweeteners, Cross-Over, Taste Perception, Indirect Calorimetry, Insulin, Glucose Metabolism
Brief summary
The goal of this randomized crossover study is to test the prediction that consuming carbohydrates will affect insulin release differently depending on whether Non-Nutritive Sweeteners (NNSs) are consumed simultaneously. We aim to determine whether the predicted effects are associated with oral or post-oral sweet taste receptor signaling,. Our study will focus on patients diagnosed with type 1 diabetes (T1D) who are using an artificial pancreas (AP) system, as it allows us to monitor glucose and insulin levels over time. Participants will drink four different flavored beverages, some with sweet taste blockade and some without, in a counter-balanced order. They will then rate the sweetness of each beverage, and we will collect data from their AP system to monitor insulin and glucose level. To achieve this, we will conduct a pilot study to assess the effectiveness and best timing of sweet taste blockade in healthy individuals. Insights gained from the pilot study will inform the main study. Sucralose will be used as the NNS, maltodextrin as the carbohydrate, and Gymnema Sylvestre (GS) as the sweet taste receptor blocker.
Interventions
OTHERSweet taste perception with/without sweet taste blockade
In our study, we will use our four different novel flavored beverages, with and without a sweet taste blockade.
Sponsors
McGill University Health Centre/Research Institute of the McGill University Health Centre
Study design
Observational model
CASE_CROSSOVER
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* Participants with a diagnosis of T1D * HbA1C ≤ 8 % * Insulin pump therapy * Adults of any gender or biological sex aged 18-45 years old, * Body Mass Index (BMI) between 18.5-29.9 kg/m, * Non-smokers, * English or French speaker. ●. Who can consume chicken and fish
Exclusion criteria
* A major medical diagnosis that could potentially influence metabolic dysfunction * A major medical diagnosis other than T1D, * Alcohol or substance use disorder, * Eating disorder or history of malabsorptive syndrome, * Inflammatory bowel disease, * Self-reported impairment in taste or smell, * A known taste or smell dysfunction (e.g., anosmia), * Active pregnancy and/or lactation, * Food allergies or intolerances, * Dislike of the test beverages, * History of bariatric surgery at any point in the past ●. Regular consumer of Gymnema sylvestre
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Effectiveness and optimal time course of sweet test blockade on sweet taste perception in healthy individuals | from enrollment to the end of treatment at 4 weeks | our aim is to test whether the impact of consuming NNS with carbohydrates on glucose metabolism is related to oral or post-oral sweet taste receptor signaling. |
| Mean plasma glucose, basal and bolus insulin changes in individuals with T1D on AP following beverage consumption. | From enrollment to the end of treatment at 4 weeks | Consuming NNS alongside carbohydrates affects glucose metabolism differently compared to carbohydrates alone in participants with type 1 diabetes (T1D) using an artificial pancreas (AP) system for exogenous insulin production |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Resting Energy Expenditure (REE) and nutrient partitioning changes in individuals with T1D on AP following beverage consumptionT1D on AP following beverage consumption | from enrollment to the end of treatment at 4 weeks | To test whether the co-ingestion of the NNS with carbohydrate can result in changes in post-ingestion metabolism, we plan to employ indirect calorimetry (IC) to evaluate resting energy expenditure (REE) before and after flavoured beverages consumption. |
Countries
Canada
Contacts
Primary ContactGolnaz Arjmand, PhD
Outcome results
None listed