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The aim of this study is to elucidate whether GLP-1 analogues influence not only appetite but also thirst perception. It is hypothesized that GLP-1 analogues reduce fluid intake in healthy volunteers compared to Placebo.
GLP-1 analogues are well known to stimulate glucose-induced insulin secretion and to reduce energy intake. Recent findings from animal and human studies suggest a role of GLP-1 in regulating water and salt homeostasis. GLP-1 has been shown to reduce fluid intake after an oral salt load or during a meal - pointing to a hypodipsic effect. The aim of this study is to elucidate whether these putative hypodipsic properties of GLP-1 analogues reduce fluid intake in healthy volunteers compared to placebo assessed during an evaluation visit of 8 hours.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Dulaglutide | Active Comparator | Dulaglutide (Trulicity®) 1.5 mg in 0.5 ml, via Pen s.c. once weekly for 3 weeks. |
|
| Placebo | Placebo Comparator | 0.5 ml normal saline (0.9% sodium chloride), sc once weekly for 3 weeks. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Dulaglutide | Drug | Evaluation visit with assessment of fluid intake |
|
| Measure | Description | Time Frame |
|---|---|---|
| Fluid intake | Fluid intake (ml) during an evaluation visit | 8 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Thirst | Thirst perception | 8 hours |
| Urine volume | Urine volume in ml | 24 hours |
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Inclusion Criteria:
- Age 18 to 65 years
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Mirjam Christ-Crain, Prof | University Hospital fo Basel | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital Basel | Basel | 4031 | Switzerland |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 35134170 | Derived | Vukajlovic T, Sailer CO, Asmar A, Jensen BL, Vogt DR, Christ-Crain M, Winzeler B. Effect of a 3-Week Treatment with GLP-1 Receptor Agonists on Vasoactive Hormones in Euvolemic Participants. J Clin Endocrinol Metab. 2022 May 17;107(6):e2581-e2589. doi: 10.1210/clinem/dgac063. |
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| ID | Term |
|---|---|
| D014883 | Water-Electrolyte Imbalance |
| ID | Term |
|---|---|
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| C555680 | dulaglutide |
| C068637 | calcium D-pantothenate, L-cysteine drug combination |
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Double-blind, placebo control, cross-over design
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Double blind study
| Placebo | Other | Evaluation visit with assessment of fluid intake |
|
| Urinary sodium | Urinary sodium excretion | 24 hours |
| Electrolytes | Plasma electrolytes | 3 timpoints during 8 hours |
| Urine electrolytes | Urine electrolytes | 3 timpoints during 8 hours |
| copeptin | copeptin values | 3 timpoints during 8 hours |
| renin | renin | 3 timpoints during 8 hours |
| aldosterone | aldosterone | 3 timpoints during 8 hours |
| Water and Salt | Brain Natriuretic Peptide (BNP) | 3 timpoints during 8 hours |
| GLP-1 | GLP-1 | 3 timpoints during 8 hours |
| Hypothalamus Pituitary Adrenal Axis (HPA) | cortisol value after Dexamethasone intake | 8 hours after Dexamethasone intake |
| circadian rhythm | circadian rhythm of serum cortisol | 16 hours |
| salivary cortisol | circadian rhythm of salivary cortisol | 16 hours |
| ACTH | circadian rhythm of ACTH | 16 hours |
| Hypothalamus Pituitary Adrenal Axis (HPA) | cortisol upon adrenocorticotropic hormone (ACTH) stimulation | 0.5 hours |
| Hypothalamus Pituitary Adrenal Axis (HPA) | free urinary cortisol | 24 hours |