Phase 1/2 Study of BDTX-1535 in Patients With Glioblastoma or Non-Small Cell Lung Cancer With EGFR Mutations

Overview

About this study

BDTX-1535-101 is an open-label, Phase 1 dose escalation and Phase 2 multiple cohort study designed to evaluate the safety, pharmacokinetics (PK), optimal dosage, central nervous system (CNS) activity, and antitumor activity of BDTX-1535. The study population comprises adults with either advanced/metastatic non-small cell lung cancer (NSCLC) with non-classical or acquired epidermal growth factor receptor (EGFR) resistance (EGFR C797S) mutations with or without CNS disease (in Phase 1 and Phase 2), or glioblastoma multiforme (GBM) expressing EGFR alterations (Phase 1 only). All patients will self administer BDTX-1535 monotherapy by mouth in 21-day cycles. Phase 1 enrollment is now complete. Phase 2 is currently enrolling.  Mayo Clinic will only be participating in Phase 2.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Phase 2 Eligibility:
Key Inclusion Criteria Required for locally advanced or metastatic NSCLC:
* Measurable disease by RECIST 1.1 criteria.
* Adequate bone marrow or organ function.
* Life expectancy of ≥ 3 months.
* Sufficient performance status.
* Confirmed NSCLC, without small cell lung cancer transformation with or without brain metastases.
* Disease progression following or intolerance of standard of care (excluding patients in the treatment-naïve non-classical driver cohort):

* Cohort 1 (Non-Classical driver cohort): Advanced/metastatic NSCLC with a non-classical driver EGFR mutation (eg, G719X) following up to 2 lines of therapy with only 1 prior EGFR TKI regimen (third-generation preferred; other approved EGFR TKI acceptable).
* Cohort 2 (Acquired resistance C797S cohort): Advanced/metastatic NSCLC with the acquired resistance C797S EGFR mutation following up to 2 lines of therapy, including only one EGFR TKI, which must be a third generation EGFR TKI (eg, osimertinib).
* Cohort 3 (First-line non-classical driver cohort): Treatment-naïve advanced/metastatic NSCLC with a non-classical driver EGFR mutation (1 cycle of chemotherapy or immune checkpoint inhibitor are permitted).
* Identification of one (or more) of the following EGFR mutations by Next Generation Sequencing (NGS) as determined by a local assay performed in a validated laboratory in the absence of other known resistance mutations (eg, T790M, MET):

* Non-classical driver EGFR mutations (eg, L861R, S768I, G719X).
* EGFR acquired resistance mutation (eg, C797S) to a 3rd generation EGFR TKI.
* NGS test must be obtained after progression on the most recent therapy; at the time of diagnosis for the patients in Cohort 3 only.

Key Exclusion Criteria:
* Known resistant mutations in tumor tissue or by liquid biopsy (eg, T790M, MET).
* Received more than 1 EGFR TKI therapy (ie, erlotinib or gefitinib) for the treatment of metastatic or recurrent EGFR NSCLC.
* Any history of interstitial lung disease related to EGFR TKI use.
* Symptomatic or radiographic leptomeningeal disease.
* Symptomatic brain metastases or spinal cord compression requiring urgent clinical intervention.
* Unresolved toxicity from prior therapy.
* Significant cardiovascular disease.
* Major surgery within 4 weeks of study entry or planned during study.
* Ongoing or recent anticancer therapy or radiation therapy.
* Evidence of malignancy (other than study-specific malignancies) requiring active therapy within the next 2 years.
* Active hepatitis B or C infection and/or known human immunodeficiency virus (HIV) carrier.
* Poorly controlled gastrointestinal disorders.


Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 5/01/2024. Questions regarding updates should be directed to the study team contact.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Anastasios Dimou, M.D.

Contact us for the latest status

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

Jacksonville, Fla.

Mayo Clinic principal investigator

Yanyan Lou, M.D., Ph.D.

Contact us for the latest status

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

More information

Publications

Publications are currently not available
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CLS-20578710

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