Modulating the GIP System in Patients With Acromegaly Due to a Pituitary Tumor (GA-9)

  • End date
    Dec 16, 2025
  • participants needed
  • sponsor
    University of Copenhagen
Updated on 15 February 2022


Modulation of the GIP System in Patients With Acromegaly Due to a Pituitary adenoma


Aim: To determine the importance of the GIP system in patients with acromegaly who has paradoxical growth hormone secretion during an oral glucose tolerance test (OGTT) using a GIP antagonist (GIP-A).

Thirty participants (age 18-75 years) with normal kidney and liver parameters and hemoglobin levels will be included in a placebo-controlled cross-over study. The study consists of two study days with concomitant infusions of A) GIP-A or B) saline (placebo).

A paradoxical growth hormone secretion to an OGTT is here defined as an increase in plasma growth hormone levels of 30% from baseline based on a mean value of the definitions in the literature.

Regazzo et al. (2017) European Journal of Endocrinology 176, 543-553 Mukai et al. (2018) The Journal of Clinical Endocrinology and Metabolism 104(5), 1637-1644 Hage et al. (2019) The Journal of Clinical Endocrinology and Metabolism 104(5), 1777-1787 Scaroni et al. (2019) J Clin Endocrinol Metab 104(3), 856-862

Condition Acromegaly Due to Pituitary Adenoma
Treatment Placebo, GIP-A
Clinical Study IdentifierNCT03807076
SponsorUniversity of Copenhagen
Last Modified on15 February 2022


Yes No Not Sure

Inclusion Criteria

Patients under clinical investigation of acromegaly disease with normal kidney function, liver function and hemoglobin levels

Exclusion Criteria

Medication for acromegaly, adenectomy, liver disease, uncontrolled anemia, severe heart disease, uncontrolled high blood pressure (>170/100 mmHg), current pregnancy
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