A First-in-Human Study of JAB-8263 in Adult Patients With Advanced Solid Tumors

Phase 1

• Conditions: Solid Tumors, Adult
• Interventions: Drug: JAB-8263

• Registration Number: NCT04587479
• Lead Sponsor: Jacobio Pharmaceuticals Co., Ltd.

Brief Summary

This is a Phase 1, first-in-human, open-label study of JAB-8263 to determine the maximum tolerated dose (MTD), recommended Phase 2 dose (RP2D) and assess the DLT. 30 subjects with advanced solid tumor will be enrolled.

Detailed Description

JAB-8263 is a small-molecule inhibitor of the highly conserved bromodomain pockets of the bromodomain and extraterminal (BET) proteins.

The objectives of this study are:

To determine the maximum-tolerated dose (MTD) and assess the dose-limiting toxicity (DLT) of JAB-8263 as a single agent to adult subjects with advanced solid tumors To assess the safety and tolerability of JAB-8263 To characterize the pharmacokinetic (PK) parameters and pharmacodynamics (PDc) To evaluate preliminary antitumor activity of JAB-8263

Study Timeline

• Study First Submitted: 2020-10-09
• Study First Submitted QC: 2020-10-09
• Study First Posted: 2020-10-14
• Study Start: 2020-11-23
• Status Verified: 2022-03
• Last Update Submitted: 2022-03-11
• Last Update Posted: 2022-03-14
• Primary Completion: 2022-04-30
• Study Completion: 2023-04-30

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

Subjects must meet all the following criteria in order to be included in the research study:

1. Subject must be ≥18 years-of-age at the time of signature of the informed consent form (ICF).
2. Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1.
3. Subjects with histologically or cytologically confirmed advanced solid tumors which have progressed despite standard therapy(ies), or are intolerant to standard therapy(ies), or have a tumor for which no standard therapy(ies) exists.
4. Subjects with life expectancy ≥3 months.
5. Patients must have at least one measurable lesion as defined by RECIST v1.1.
6. Patients who have sufficient baseline organ function.

Exclusion Criteria

1. History (≤3 years) of cancer that is histologically distinct from the cancer under study.
2. Known serious allergy to investigational drug or excipients
3. Active brain or spinal metastases
4. History of pericarditis or Grade ≥2 pericardial effusion
5. History of interstitial lung disease.
6. History of Grade ≥2 active infections within 2 weeks
7. Known human immunodeficiency virus (HIV) infection
8. Seropositive for hepatitis B virus (HBV)
9. Seropositive for hepatitis C virus (HCV), or HCV-RNA viral levels are not detectable.
10. Any severe and/or uncontrolled medical conditions
11. History of myocardial infarction, unstable angina pectoris, coronary artery bypass graft, or cerebrovascular accident
12. Impaired cardiac function or clinically significant cardiac diseases
13. QTcF >470 msec at screening
14. History of medically significant thromboembolic events or bleeding diathesis
15. Unresolved Grade >1 toxicity
16. History of malignant biliary obstruction
17. Pregnant or breast-feeding

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
JAB-8263	JAB-8263	Monotherapy, dose escalation

Primary Outcome Measures

Name	Time	Method
Number of participants with dose limiting toxicities	Approximately 2.5 years	Incidence of dose limiting toxicities (DLTs) in the dose escalation phase. A DLT is defined as an adverse event or abnormal laboratory value assessed as unrelated to disease, disease progression, inter-current illness, or concomitant medications that occurs within the first treatment cycle with JAB-8263
Find Recommended Phase 2 Dose (RP2D) of JAB-8263	Approximately 2.5 years	Measurements of MTD (i.e. the highest dose of JAB-8263 associated with the occurrence of Dose Limiting Toxicities (DLTs) in \<33% of patients) or the RP2D (i.e. the highest tested dose that is declared safe and tolerable by the Investigators and Sponsor)

Secondary Outcome Measures

Name	Time	Method
Duration of response ( DOR )	Approximately 2.5 years	DOR is defined as the time from the participant's initial objective response (CR or PR) to study drug therapy, to disease progression or death due to any cause, whichever occurs first.
Number of participants with adverse events	Approximately 2.5 years	All patients participating in this study will be assessed for incidence and severity of adverse events (AEs) and serious AEs, including changes in laboratory values, vital signs, electrocardiograms, cardiac imaging and ophthalmological assessments
Area under the curve	Approximately 2.5 years	Area under the plasma concentration time curve of JAB-8263
Cmax	Approximately 2.5 years	Highest observed plasma concentration of JAB-8263
T1/2	Approximately 2.5 years	Half life of JAB-8263
Tmax	Approximately 2.5 years	Time of highest observed plasma concentration of JAB-8263
Objective response rate ( ORR )	Approximately 2.5 years	ORR is defined as the proportion of participants with complete response or partial response (CR+PR)

Trial Locations

Locations (3)

Florida Cancer Center, Lake Mary; 🇺🇸 Lake City, Florida, United States

SCRI HeatlthONE; 🇺🇸 Denver, Colorado, United States

Tennessee Oncology Nashville; 🇺🇸 Nashville, Tennessee, United States