Status and phase
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About
This is a Phase 1/2, open-label, first-in-human (FIH) study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and anticancer activity of BLU-945, a selective EGFR inhibitor, as monotherapy or in combination with osimertinib.
Full description
The study will include an initial Phase 1 portion to determine the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D) of BLU-945 as monotherapy (initially in a QD regimen with the option to evaluate BID dosing, if supported by emerging PK and safety data), as well as an additional dose-escalation portion to determine the RP2D of BLU-945 in combination with osimertinib. The BLU-945 monotherapy Phase 2 expansion groups will consist of patients with tumors harboring specific mutation profiles (EGFR T790M and C797S mutation [Group 1]; EGFR T790M but not C797S [Group 2]; or EGFR C797S but not T790M [Group 3]). The BLU-945 with osimertinib Phase 2 expansion (Group 4) will include approximately 24 evaluable patients, with at least 12 slots reserved for patients with EGFR T790M and C797S mutation.
Enrollment
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Volunteers
Inclusion criteria
≥18 years of age at the time of signing the informed consent.
Pathologically confirmed, definitively diagnosed, metastatic NSCLC harboring an activating EGFR mutation.
Previously received at least 1 prior EGFR-targeted TKI with activity against the T790M mutation, such as osimertinib.
a. Phase 1 Part 1B and Phase 2 Group 4: Patients must have experienced progressive disease while on osimertinib, and were able to tolerate prior osimertinib 80 mg QD dose.
Tumor mutation profile determined locally via a Sponsor-approved testing methodology, using tumor tissue (ideally from a progressing lesion) and/or ctDNA in plasma. For Phase 1, it is preferable that samples used for analysis be obtained during or after disease progression on the last EGFR-targeted TKI received. For Phase 2, pre-treatment tumor sample must be obtained during or after disease progression on the last EGFR-targeted TKI received.
Pretreatment tumor sample (either an archival sample or a sample obtained by pretreatment biopsy) submitted for central analysis. For Phase 1, it is preferable that pretreatment tumor samples be obtained from a progression lesion, during or after disease progression on the last EGFR-targeted TKI received. For Phase 2, pre-treatment tumor sample must be obtained during or after disease progression on the last EGFR-targeted TKI received.
Patients without appropriate archival tissue available, where biopsy is not considered safe and/or medically feasible, may be discussed with the study medical monitor and may be approved for enrollment on a case-by-case basis.
Phase 2 Expansion Groups: Patient has at least 1 measurable target lesion evaluable by RECIST 1.1 as assessed by the investigator.
Eastern Cooperative Oncology Group (ECOG) performance status is 0-1.
Agrees to use contraception consistent with the protocol and local regulations
Exclusion criteria
Tumor harbors any additional known driver alterations (including but not limited to EGFR exon 20 insertion, or pathologic abnormalities of KRAS, BRAF V600E, NTRK1/2/3, HER2, ALK, ROS1, MET, or RET).
NSCLC with mixed cell histology or a tumor with histologic transformation (NSCLC to SCLC, SCLC to NSCLC, or epithelial to mesenchymal transition).
Received the following anticancer therapy:
CNS metastases or spinal cord compression that is associated with progressive neurological symptoms or requires increasing doses of corticosteroids to control the CNS disease. If a patient requires corticosteroids for management of CNS disease, the dose must have been stable for the 2 weeks preceding treatment. Asymptomatic CNS and leptomeningeal disease is allowed and, when measurable, should be captured as target lesions.
Any of the following abnormalities on the most recent laboratory test prior to the first dose of study drug (ie, Cycle 1 Day 1 [C1D1] or screening):
Known intracranial hemorrhage and/or bleeding diatheses.
Clinically active ongoing interstitial lung disease (ILD) of any etiology, including drug-induced ILD, and radiation pneumonitis within 28 days prior to initiation of study treatment. Patients with prior ILD associated with clinically resolved COVID 19 infection may be enrolled upon discussion with, and approval by, the Medical Monitor.
Any unresolved toxicities from prior therapy greater than Common Terminology Criteria for Adverse Events (CTCAE) Grade 1 or that have not resolved to baseline at the time of starting the study. Exceptions include alopecia and fatigue, and, upon discussion with and approval by the Medical Monitor, other toxicities that are not thought to present a risk to patient safety.
Mean resting QT interval corrected using Fridericia's formula (QTcF) >450 msec, a history of prolonged QT syndrome or Torsades de pointes, or a familial history of prolonged QT syndrome.
Clinically significant, uncontrolled, cardiovascular disease including congestive heart failure Grade III or IV according to the New York Heart Association classification; myocardial infarction or unstable angina within the previous 6 months, uncontrolled hypertension, or clinically significant, uncontrolled arrhythmias, including bradyarrhythmia that may cause QT prolongation (eg, Type II second degree heart block or third-degree heart block).
History of another primary malignancy (other than completely resected carcinomas in situ) that has been diagnosed or required therapy within 2 years prior to initiation of study treatment. However, upon discussion with the Sponsor, the following categories of patients with prior malignancy are eligible to participate:
Active, uncontrolled infection (viral, bacterial, or fungal) or active tuberculosis, hepatitis B, hepatitis C, AIDS-related illness, or known COVID 19 infection. Controlled infections, including HIV and "cured" hepatitis C (no active fever, no evidence of systemic inflammatory response syndrome) that are stable on antiviral treatment may be eligible if benefit/risk is justified and permission is granted from the Sponsor.
Dose-escalation (Parts 1A and 1B): Received neutrophil or platelet growth factor support within 14 days of the first dose of study drug.
Requires treatment with a prohibited medication or herbal remedy that cannot be discontinued at least 2 weeks before the start of study drug administration. BLU 945 may be started within 14 days or 5 half-lives of these therapies if considered by the Investigator to be safe and within the best interest of the patient, with prior Sponsor approval.
Major surgical procedure within 14 days of the first dose of study drug (procedures such as central venous catheter placement, tumor needle biopsy, and feeding tube placement are not considered major surgical procedures).
Primary purpose
Allocation
Interventional model
Masking
177 participants in 6 patient groups
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Central trial contact
Blueprint Medicines
Data sourced from clinicaltrials.gov
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