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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
17
Evaluation visit with assessment of fluid intake
Evaluation visit with assessment of fluid intake
University Hospital Basel
Basel, Switzerland
Fluid intake
Fluid intake (ml) during an evaluation visit
Time frame: 8 hours
Thirst
Thirst perception
Time frame: 8 hours
Urine volume
Urine volume in ml
Time frame: 24 hours
Urinary sodium
Urinary sodium excretion
Time frame: 24 hours
Electrolytes
Plasma electrolytes
Time frame: 3 timpoints during 8 hours
Urine electrolytes
Urine electrolytes
Time frame: 3 timpoints during 8 hours
copeptin
copeptin values
Time frame: 3 timpoints during 8 hours
renin
renin
Time frame: 3 timpoints during 8 hours
aldosterone
aldosterone
Time frame: 3 timpoints during 8 hours
Water and Salt
Brain Natriuretic Peptide (BNP)
Time frame: 3 timpoints during 8 hours
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GLP-1
GLP-1
Time frame: 3 timpoints during 8 hours
Hypothalamus Pituitary Adrenal Axis (HPA)
cortisol value after Dexamethasone intake
Time frame: 8 hours after Dexamethasone intake
circadian rhythm
circadian rhythm of serum cortisol
Time frame: 16 hours
salivary cortisol
circadian rhythm of salivary cortisol
Time frame: 16 hours
ACTH
circadian rhythm of ACTH
Time frame: 16 hours
Hypothalamus Pituitary Adrenal Axis (HPA)
cortisol upon adrenocorticotropic hormone (ACTH) stimulation
Time frame: 0.5 hours
Hypothalamus Pituitary Adrenal Axis (HPA)
free urinary cortisol
Time frame: 24 hours