About this trial
The primary objective of this study is to evaluate the efficacy of 15-week treatment with ALXN2420 versus placebo for decreasing insulin-like growth factor IGF-1 levels, when administered in combination with somatostatin analog (SSA) therapy to adult participants with acromegaly.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Documented diagnosis of acromegaly, that is, historically documented evidence of a GH-secreting pituitary adenoma based on MRI or pathology report
Received for ≥ 6 months prior to screening
Receiving a once-monthly regimen (approximately every 4 weeks). Note: participants on stable regimens of other durations (for example, every 3 or 6 weeks) are not eligible
Must be a partial responder to SSAs defined as > 20% relative IGF 1 reduction during the course of SSA therapy
Disqualifiers
Had surgery for pituitary adenoma within the last 6 months before Day 1 or planning to receive surgery for pituitary adenoma during the study
Pituitary adenoma that, per Investigator's judgment, is worsening as assessed by pituitary/sellar MRI or computed tomography scan obtained ≤ 6 months prior to screening
Pituitary adenoma causing compression of the chiasm
Clinical evidence of symptomatic hyperprolactinemia that would necessitate treatment with dopamine agonists
Trial design
Parallel
Treatments tested in this trial
ALXN2420
DrugALXN2420 will be administered via subcutaneous (SC) injection
Placebo
DrugPlacebo will be administered via SC injection.
Treatment groups
Trial outcomes
Primary outcomes
Percentage Change From Baseline in Serum IGF-1 Level at Week 15
Secondary outcomes
Number of Participants Who Achieve Serum IGF-1 Level ≤1.3 Upper Limit of Normal (ULN) at Week 15
Number of Participants Who Achieve of Serum IGF-1 Level ≤1.0 ULN at Week 15
Change from Basline in Symptoms as assessed by disease specific questionnaire, at Week 15
Change From Baseline in Serum IGF-1 Level at Week 15
Sponsors and contacts
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