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The investigators propose to assess the contributions of the thermic effect of food intake (TEF), which is the amount of energy expended to digest food, to overall energy expenditure in Cystic Fibrosis (CF).
Total energy expenditure (TEE) is comprised of the following components: resting energy expenditure (REE), thermic effect of food intake (TEF), adaptive thermogenesis (AT). The thermic effect of food is the amount of energy expended to digest food, and can be affected by factors such as protein / fat / carbohydrate contents of meals or the amount of time over which a meal is consumed. The investigators propose to assess the contributions of the thermic effect of food intake (TEF), which is the amount of energy expended to digest food, to overall energy expenditure in CF. Participants will be assigned to either a high fat liquid meal or a high protein liquid meal and assessed for components of energy expenditure in the whole room indirect calorimeter (metabolic chamber); participants will then be crossed over to the alternate liquid meal type, and differences in resting and total energy expenditure and the thermic effect of food will be assessed between the two types of meals.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| High fat | Experimental | Boost VHC (Very High Calorie), Nestle, 8 ounce can |
|
| High protein | Experimental | Ensure High Protein 8 ounce can |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Boost VHC | Dietary Supplement | 8 ounce can liquid meal, calories 530kcal, Carbohydrate 46g, Protein 22g, Fat 30g |
|
| Measure | Description | Time Frame |
|---|---|---|
| Energy Expenditure | The changes in energy expenditure measured in kcal (resting energy expenditure prior to feeding, and thermic effect of food after meal administration) will be recorded in the metabolic chamber. | 16 hours after entry into metabolic chamber |
| Measure | Description | Time Frame |
|---|---|---|
| glucose | blood glucose (mg/dL) measured with continuous glucose sensor and fasting venous sample at end of study visit | 16 hours after entry into metabolic chamber |
| insulin | fasting insulin level (mIU/mL) measured at end of overnight visit |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Trang Le, MD | Virginia Commonwealth University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Virginia Commonwealth University | Richmond | Virginia | 23236 | United States |
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| ID | Term |
|---|---|
| D003550 | Cystic Fibrosis |
| ID | Term |
|---|---|
| D010182 | Pancreatic Diseases |
| D004066 | Digestive System Diseases |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |
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| Ensure High Protein | Dietary Supplement | 8 ounce can liquid meal, calories 160kcal, Carbohydrate 13g, Protein 16g, Fat 2g |
|
| 16 hours after entry into metabolic chamber |
| Leptin | fasting leptin level (ng/mL) measured at end of overnight visit | 16 hours after entry into metabolic chamber |
| Ghrelin | fasting grehlin levels (pg/mL) measured at end of overnight visit | 16 hours after entry into metabolic chamber |
| D030342 |
| Genetic Diseases, Inborn |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |
| D007232 | Infant, Newborn, Diseases |