(Summit) A Study to Evaluate the Efficacy and Safety of CGT9486 Versus Placebo in Patients With I… (NCT05186753) | Clinical Trial Compass
Active — Not RecruitingPhase 2
(Summit) A Study to Evaluate the Efficacy and Safety of CGT9486 Versus Placebo in Patients With Indolent or Smoldering Systemic Mastocytosis
United States, Australia, Belgium237 participantsStarted 2022-06-27
Plain-language summary
This is a multi-part, randomized, double-blind, placebo-controlled Phase 2 clinical study comparing the safety and efficacy of bezuclastinib (CGT9486) plus best supportive care (BSC) with placebo plus BSC in patients with nonadvanced systemic mastocytosis (NonAdvSM), including indolent systemic mastocytosis and smoldering systemic mastocytosis, whose symptoms are not adequately controlled by BSC. This study will be conducted in three parts. Patients in Parts 1a, 1b and 2 will receive bezuclastinib or placebo, and may roll over onto Part 3 to receive treatment with bezuclastinib. Additionally, a substudy of subjects will investigate the efficacy, safety, and tolerability of bezuclastinib in patients who are experiencing inadequate symptom control with avapritinib.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Diagnosed with 1 of the following diagnoses according to the 2016 World Health Organization (WHO) classification for systemic mastocytosis (SM):
. Moderate-to-severe symptoms based on a minimum total symptom scoew (TSS) of the Mastocytosis Activity Score (MAS) and after establishing a stable regimen of at least 2 antimediator therapies over a 14-day eligibility period
. Eastern Cooperative Oncology Group (ECOG) Performance Status 0 to 2
. For patients receiving corticosteroids, the dose must be ≤10 mg/day of prednisone or equivalent
Exclusion criteria
. Persistent toxicity from previous therapy for NonAdvSM that has not resolved to ≤ Grade 1
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Part 1: Determine recommended dose of bezuclastinib (CGT9486) in subjects with NonAdvSM
Timeframe: 3 months
2
Part 2: Efficacy of bezuclastinib at the selected dose versus placebo
Timeframe: 24 Weeks
3
Part 3: Safety and tolerability of bezuclastinib as assessed by number of adverse events
. Diagnosed with any of the following WHO SM classifications: bone marrow mastocytosis, advanced systemic mastocytosis including SM with associated hematologic neoplasm, aggressive SM, mast cell leukemia; or mast cell sarcoma
. Diagnosed with mastocytosis of the skin without systemic involvement
. Received prior treatment with any targeted KIT inhibitor with the exception of approved agents for the treatment of SM
. Received prior cytoreductive therapy or investigational agent for \<14 days or 5 half- lives of the drug and for cladribine, interferon alpha, pegylated interferon, or antibody therapy \<28 days or 5 half-lives of the drug (whichever is longer), before starting screening assessments
. Received radiotherapy or psoralen and ultraviolet A therapy \<14 days before starting screening assessments
. Received any hematopoietic growth factor support \<14 days or 5 half lives of the drug before starting screening assessments
. History of clinically significant bleeding event within 30 days before the first dose of study drug or need for therapeutic anticoagulation on study