Glucose-dependent INsulinotropic Polypeptide: Effect on Bone Remodelling and Cell Activity (GINEBRA)

Brief summary (registry, in English)

Glucose-dependent insulinotropic polypeptide (GIP) is released by the intestines in response to food intake and increases insulin secretion. Although short-term (\< 3 hours) stimulation with GIP decreases bone resorption in humans, the effect may vanish following continuous administration within 24 hours, at least in patients with type 1 diabetes. Whether the anti-resorptive effect of GIP can be maintained if the hormone is non-continuously administrated is unclear. As the first GIP receptor (GIPR) agonist, tirzepatide was recently approved for the treatment of obesity and type 2 diabetes in the USA and type 2 diabetes alone in the EU, there is a need to establish knowledge about the long-term effects of GIP on bone health, including if different exposure times to GIP have different skeletal effects. This project will investigate whether GIP maintains its anti-resorptive potential if given as intermittent compared to continuous infusion in healthy men and women aged 18-40 years. Administration cycles involve intermittent (8 hours daily) and continuous (24 hours daily) injection of GIP for three days each. The effect of GIP will be measured by bone markers in blood samples, as well as in vitro activity and genetic alterations of bone cells (osteoclasts and osteoblasts) using bone marrow aspirates and bone marrow biopsies. Each participant will receive both administration cycles using a crossover design with a 14-28 days washout period between administrations of GIP.

What you commit to

• Study type: Interventional
• Participants enrolled: 13
• From 10 Nov 2025 to the primary completion date, 17 Sept 2026
• 1 site in 1 country
• Visits and tests: ask the trial team, the registry does not list them

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Who cannot take part

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Who the study is looking for

Age in the registry: 18 years to 40 years · Sex: All · Accepts healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

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