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Completed

NCT Number: NCT03792555

A Study to Evaluate the Safety and Efficacy of Paltusotine for the Treatment of Acromegaly (ACROBAT Evolve)

A Phase 2 double-blind, placebo-controlled, randomized withdrawal study is designed to evaluate the safety, efficacy, and pharmacokinetics of paltusotine (formerly CRN00808) in subjects with acromegaly that are responders to octreotide LAR or lanreotide depot.

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Key information

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

CETI - Centro de Estudos em Terapias Inovadoras, Curitiba, Brazil

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male and female subjects 18 to 75 years of age
  • Confirmed diagnosis of acromegaly that is controlled on stable doses of octreotide LAR or lanreotide depot
  • Females must be non-pregnant and non-lactating, and either surgically sterile, post-menopausal, or using effective method(s) of birth control
  • Willing to provide signed informed consent

Exclusion criteria

  • Treatment naïve acromegaly subjects
  • Prior treatment with paltusotine
  • Pituitary surgery within 6 months prior to Screening or radiation therapy at any time prior to the study entry. Pituitary radiation therapy (within 3 to 4 years or more than 4 years prior to study entry) with recently documented elevated IGF-1 may be eligible.
  • History or presence of malignancy except adequately treated basal cell and squamous cell carcinomas of the skin within the past 5 years.
  • Use of any investigational drug within the past 30 days or 5 half-lives, whichever is longer
  • Positive test at Screening for HIV, hepatitis B surface antigen (HBsAg) or hepatitis C antibody (HCV-Ab) or has a history of a positive result
  • History of alcohol or substance abuse in the past 12 months
  • Any condition that in the opinion of the investigator would jeopardize the subject's appropriate participation in this study
  • Cardiovascular conditions or medications associated with prolonged QT or those which predispose subjects to heart rhythm abnormalities.
  • Subjects with symptomatic cholelithiasis
  • Subjects with clinically significant abnormal findings during the Screening Period, and any other medical condition(s) or laboratory findings that, in the opinion of the Investigator, might jeopardize the subject's safety or ability to complete the study
  • Subjects who have been taking the following prior medications: pegvisomant (within the last 3 months), dopamine agonists (within the last 3 months) and pasireotide LAR (within the last 6 months)
  • Subjects taking octreotide LAR at a dose higher than 40 mg or lanreotide depot at a dose higher than 120 mg
  • Subjects who usually take octreotide LAR or lanreotide depot less frequently than every 4 weeks (e.g. every 6 weeks or 8 weeks)

Treatment and study plan

Paltusotine

Drug

Paltusotine, capsules, once daily by mouth

Other names: CRN00808

Placebo

Drug

Placebo, capsules, once daily by mouth

Primary outcomes

  1. Responder Criteria Was Based on the Mean of Two Consecutive Insulin-like Growth Factor-1 [IGF-1] Measurements ≤ULN at Week 13

    Time frame: 13 Weeks

    Proportion of subjects who meet responder criteria (based on the mean of two consecutive IGF-1 measurements ≤ upper limit of normal [ULN])

Secondary outcomes

  1. Change in IGF-1 Levels

    Time frame: From Week 10 to Week 13

    Change in IGF-1 levels between RWP Baseline/Week 10 and Week 13

  2. Change in Growth Hormone (GH) Levels

    Time frame: From Week 8 to Week 13

    Change in growth hormone levels between RWP Baseline/Week 8 and Week 13

  3. Change in Total ASD Score Between RWP Baseline/Week 10 and Week 13

    Time frame: From Week 10 to Week 13

    Measured by total Acromegaly symptom diary (ASD) score from W10-W13.

    ASD is a sponsor-developed daily diary to assess important acromegaly symptoms from the patient perspective. It covers 7 symptoms (headache pain, joint pain, sweating, fatigue, weakness in legs, swelling, and numbness or tingling). Patients rate the severity of each experience in the past 24 hours on an 11-point numeric scale that ranges from 0 (no symptom) to 10 (worst symptom).

    A weekly average ASD score is calculated for each item as the sum of the item responses for a specific item over the course of the study week divided by the number of days on which the item was completed.

    The weekly average ASD total score is calculated by computing the sum of the weekly average item scores for the 7 items (total range from 0 to 70), where higher score = higher symptom severity.

Sponsors and collaborators

Lead sponsor

Crinetics Pharmaceuticals Inc.

Industry

Registry information

Official study title

A Double-blind, Placebo-controlled, Randomized Withdrawal Study to Evaluate the Safety, Pharmacokinetics and Efficacy of CRN00808 in Patients With Acromegaly That Are Responders to Octreotide LAR or Lanreotide Depot (ACROBAT Evolve)

Important dates

Study start
2019
Primary completion
2020
Study completion
2020
First posted
Jan 3, 2019
Registry last updated
Mar 17, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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