Neoplasms

Digestive System Diseases

All Conditions

Skin and Connective Tissue Diseases

Rare Diseases

Gastrointestinal Stromal Tumors

Neoplasms, Connective Tissue

Neoplasms, Connective and Soft Tissue

Neoplasms by Histologic Type

Gastrointestinal Neoplasms

Digestive System Neoplasms

Gastrointestinal Diseases

Antineoplastic Agents

All Drugs and Chemicals

Amino Acids

Sunitinib

Tyrosine Kinase Inhibitors

Imatinib Mesylate

Angiogenesis Inhibitors

Growth Inhibitors

Protein Kinase Inhibitors

Enzyme Inhibitors

Tyrosine

Participants will receive PLX9486 250 milligrams (mg) orally once daily (QD) in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 350 mg orally QD in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 500 mg orally QD in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 1000 mg orally QD in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 500 mg orally twice daily (BID) in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants in fasting condition will receive PLX9486 500 mg orally QD in combination with pexidartinib 600 mg (administered as 1 capsule of 200 mg in the morning and 2 capsules of 200 mg in the evening) orally in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants in non-fasting condition will receive PLX9486 500 mg orally QD in combination with pexidartinib 600 mg (administered as 1 capsule of 200 mg in the morning and 2 capsules of 200 mg in the evening) orally in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 500 mg orally QD in combination with sunitinib 25 mg orally in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 1000 mg orally QD in combination with sunitinib 25 mg orally in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

Participants will receive PLX9486 1000 mg orally QD in combination with sunitinib 37.5 mg orally in 28-day dosing cycles. Treatment will continue until participant discontinuation, withdrawal, or study termination.

PLX9486 will be administered per dose and schedule specified in the arm.

PLX9486

Pexidartinib capsules will be administered per dose and schedule specified in the arm.

Pexidartinib

Sunitinib will be administered per dose and schedule specified in the arm.

The goal of this clinical research study is to learn how CGT9486 (fka PLX9486) may affect cancer cells with certain mutations in the KIT gene, specifically in participants with types of advanced solid tumors including gastrointestinal stromal tumor (GIST).

CGT9486 (fka PLX9486) is designed to block KIT gene mutations. These mutations can cause cancer and cancer cell growth. By blocking these mutations, the drug may kill the cancer cells with the mutation and/or stop the tumor from growing. By combining CGT9486 (fka PLX9486) with PLX3397 and CGT9486 (fka PLX9486) with sunitinib, the investigators hope to block most KIT gene mutations that drive cancer growth.

This study includes a dose escalation portion (Part 1) in which the safety profile and recommended phase 2 dose (RP2D) of PLX9486 as a single oral agent will be evaluated in participants with solid tumors (including GIST), followed by signal-seeking extension cohorts (Part 2). Enrollment in the combination treatment portions of the study (dose-finding for the PLX9486 + pexidartinib combination \[Part 2b\] and the PLX9486 + sunitinib combination \[Part 2e\]) was planned to be accrued using standard 3+3 study designs. Parts 2a, 2c, 2d, and 2f were not conducted due to business decisions.

CGT9486 (Formerly Known as PLX9486) as a Single Agent and in Combination With PLX3397 (Pexidartinib) or Sunitinib in Participants With Advanced Solid Tumors

A Phase 1b and 2a Study to Assess Safety, Pharmacokinetics, Pharmacodynamics, and Preliminary Efficacy of PLX9486 as a Single Agent and in Combination With PLX3397 or Sunitinib (Sutent®) in Patients With Advanced Solid Tumors and Patients With Locally Advanced, Unresectable, or Metastatic Gastrointestinal Stromal Tumor (GIST) Who Have Been Previously Treated With Imatinib Mesylate/KIT-Directed Tyrosine Kinase Inhibitor (TKI) Therapy

Overall response rate is defined by the proportion of patients who achieve a complete response (CR) or partial response (PR) by RECIST 1.1.

Duration of tumor response based on MRI and RECIST 1.1.

Progressive free survival (PFS) as defined by the number of days from the first day of treatment (C1D1) to the date of the first documented disease progression or date of death, whichever occurs first.

Overall response rate (ORR) as defined by the proportion of patients who achieve a complete response (CR) or partial response (PR) by RECIST 1.1.

Plexxikon

Cogent Biosciences, Inc.

Symptoms and General Pathology

Neoplasm Metastasis

Tin Fluorides

Participants will receive both CGT9486 and sunitinib orally until study stopping rules are met.

CGT9486 plus sunitinib

Participants will receive CGT9486 until steady state then both CGT9486 and sunitinib orally until study stopping rules are met.

CGT9486

Participants will receive sunitinib until steady state then both sunitinib and CGT9486 orally until study stopping rules are met.

Participants will receive sunitinib orally until study stopping rules are met.

Cogent Biosciences

Jessica Sachs, MD

This is a Phase 3, open-label, international, multicenter study of CGT9486 in combination with sunitinib. This is a multi-part study that will enroll approximately 426 patients. Part 1 consists of two evaluations: 1) confirming the dose of an updated formulation of CGT9486 to be used in subsequent parts in approximately 20 patients who have received at least one prior line of therapy for GIST and 2) evaluating for drug-drug interactions between CGT9486 and sunitinib in approximately 18 patients who have received at least two prior tyrosine kinase inhibitors (TKIs) for GISTs. The second part of the study will enroll approximately 388 patients who are intolerant to, or who failed prior treatment with imatinib only and will compare the efficacy of CGT9486 plus sunitinib to sunitinib alone with patients being randomized in a 1:1 manner.

This is a multi-part study: Part 1a is a single-arm design, Part 1b is a two-arm parallel design drug-drug interaction evaluation in the first treatment cycle and single-arm design in subsequent treatment cycles, and Part 2 is a randomized two-arm parallel comparator study

(Peak) A Phase 3 Randomized Trial of CGT9486+Sunitinib vs. Sunitinib in Subjects With Gastrointestinal Stromal Tumors

A Phase 3 Randomized, Open-Label, Multicenter Clinical Study of CGT9486+Sunitinib vs. Sunitinib in Subjects With Locally Advanced, Unresectable, or Metastatic Gastrointestinal Stromal Tumors

Area under the plasma concentration-time curve (AUC)

Time to maximum observed plasma concentration (Tmax)

Time from first dose to documented disease progression or death due to any cause, whichever occurs first

Incidence and severity of Adverse Events from first dose of study drug

Incidence and severity of Serious Adverse Events from first dose of study drug

Incidence of Adverse Events leading to dose modifications from first dose of study drug

Change from baseline in laboratory results

Time from first dose to death due to any cause

Percentage of subjects who achieved documented complete response (CR) + confirmed partial response (PR) based on modified Response Evaluation Criteria in Solid Tumors (RECIST) Version 1.1

Percentage of subjects who achieved CR + PR + stable disease (SD) at 16 weeks

Time from first dose to first documented response based on modified Response Evaluation Criteria in Solid Tumors Version 1.1

Time from first response (CR or PR) to the date of progression or death from any cause, whichever occurs first

Change in individual scores in patients with locally advanced, unresectable, or metastatic GIST treated with CGT9486 in combination with sunitinib compared with patients treated with sunitinib monotherapy. The scale comprises 30 questions, 24 of which are aggregated into 9 multi-item scales, to include 5 functioning scales (physical, role, cognitive, emotional and social), 3 symptom scales (fatigue, pain and nausea/vomiting) and 1 global health status scale. The remaining 6 single-item scales assess symptoms (dyspnea, appetite loss, sleep disturbance, constipation, diarrhea and the financial impact). All of the scales and single-item measures range in score from 0 to 100. Higher score for the functioning scales and global health status denote a better level of functioning, while higher scores on the symptom and single-item scales indicate a higher level of symptoms.

Immune System Diseases

Blood and Lymph Conditions

Mastocytosis

Hypersensitivity

Hematologic Diseases

Mastocytosis, Systemic

Immune Complex Diseases

Mast Cell Activation Disorders

Systemic Mastocytosis

Antigen-Antibody Complex

Bezuclastinib will be administered orally, once daily continuously for 28-day cycles

Bezuclastinib Tablets (Formulation A)

Bezuclastinib Tablets (Formulation B)

Placebo will be administered orally, once daily continuously for 28-day cycles

Placebo Tablets

Hina Jolin, PharmD

Rachael Easton, MD, PhD

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.

In Part 1a and 1b of the study, patients with NonAdvSM will be randomly assigned to 1 of 2 dose levels of bezuclastinib plus BSC, or to placebo plus BSC. Upon analysis of the Part 1 data, a dose will be selected for Part 2. In Part 2, patients with NonAdvSM will be randomly assigned to the selected dose of bezuclastinib plus BSC, or to placebo plus BSC.

Patients who complete Part 1 or Part 2 may participate in Part 3 in which all patients will receive bezuclastinib plus BSC.

(Summit) A Study to Evaluate the Efficacy and Safety of CGT9486 Versus Placebo in Patients With Indolent or Smoldering Systemic Mastocytosis

A Multi-Part, Randomized, Double-Blind, Placebo-Controlled Phase 2 Clinical Study of The Safety and Efficacy of CGT9486 in Subjects With Nonadvanced Systemic Mastocytosis

Selection of the recommended dose to be used in subsequent parts of the study.

Mean absolute change in a disease-specific patient reported outcome (PRO)

Scale of 0-100, higher numbers represent more severe impairment to quality of life.

Scale of 0-100, higher numbers represent better symptom outcomes

Response rate based on reduction in disease specific PRO

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization
CGT9486 (Formerly Known as PLX9486) as a Single Agent and in Combination With PLX3397 (Pexidartinib) or Sunitinib in Participants With Advanced Solid Tumors	NCT02401815	Gastrointestina...	PLX9486 Pexidartinib Sunitinib	18 Years -	Cogent Biosciences, Inc.
(Peak) A Phase 3 Randomized Trial of CGT9486+Sunitinib vs. Sunitinib in Subjects With Gastrointestinal Stromal Tumors	NCT05208047	Advanced Gastro... Metastatic Canc...	CGT9486 plus su... CGT9486 Sunitinib Sunitinib	18 Years -	Cogent Biosciences, Inc.
(Summit) A Study to Evaluate the Efficacy and Safety of CGT9486 Versus Placebo in Patients With Indolent or Smoldering Systemic Mastocytosis	NCT05186753	SSM Mastocytosis, I... Mastocytosis, S... Mastocytosis	Bezuclastinib T... Bezuclastinib T... Placebo Tablets	18 Years -	Cogent Biosciences, Inc.

Spots Global Cancer Trial Database for plx9486

Every month we try and update this database with for plx9486 cancer trials from around the world to help patients and their families find trials that might be right for them.
We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.

Spots Global Cancer Trial Database for plx9486

Every month we try and update this database with for plx9486 cancer trials from around the world to help patients and their families find trials that might be right for them. We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.

Every month we try and update this database with for plx9486 cancer trials from around the world to help patients and their families find trials that might be right for them.
We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.