Study of PBI-200 in Subjects With NTRK-Fusion-Positive Solid Tumors
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| ClinicalTrials.gov Identifier: NCT04901806 |
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Recruitment Status :
Terminated
(Sponsor terminated development of PBI-200)
First Posted : May 26, 2021
Last Update Posted : March 28, 2024
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| Condition or disease | Intervention/treatment | Phase |
|---|---|---|
| Solid Tumor, Adult Brain Tumor, Primary Desmoplastic Small Round Cell Tumor | Drug: PBI-200 | Phase 1 |
This is a first-in-human, open-label, multicenter, dose-escalation, safety, PK, and biomarker study of PBI-200 in subjects with NTRK-fusion-positive advanced or metastatic solid tumors. Phase 1 will also include subjects with NTRK-amplified advanced or metastatic solid tumors or refractory EWSR1-WT1-fusion-positive desmoplastic small round cell tumors (DSRCTs).
Phase 1 is the dose-escalation portion of the study in which the evaluation of safety and tolerability and establishing the RP2D are primary objectives. Once the RP2D has been established, two expansion cohorts will open to accrual, a Non-Brain Primary Tumor cohort and a Primary Brian Tumor cohort.
Although this was intended to be a Phase 1/2 trial, the trial was terminated without proceeding to Phase 2.
| Study Type : | Interventional (Clinical Trial) |
| Actual Enrollment : | 29 participants |
| Allocation: | Non-Randomized |
| Intervention Model: | Sequential Assignment |
| Intervention Model Description: | Dose Escalation: Single-subject cohorts will be enrolled initially, until a subject has a Grade 2 or greater adverse event (AE), at which time a 3+3 design will be utilized. Dose escalation will continue until the maximum-tolerated dose (MTD) is reached, or the Recommended Phase 2 Dose (RP2D) is established. Cohort Expansion: Two cohorts will be opened to accrual. Cohort A will enroll subjects with a non-brain primary tumor and Cohort B will enroll subjects with a primary brain tumor. |
| Masking: | None (Open Label) |
| Primary Purpose: | Treatment |
| Official Title: | A Phase 1/2 Study of PBI-200 in Subjects With NTRK-Fusion-Positive Advanced or Metastatic Solid Tumors |
| Actual Study Start Date : | July 20, 2021 |
| Actual Primary Completion Date : | July 26, 2023 |
| Actual Study Completion Date : | July 26, 2023 |
| Arm | Intervention/treatment |
|---|---|
| Experimental: Phase 1 Dose Escalation |
Drug: PBI-200
PBI-200 will be administered orally over continuous 28-day cycles |
| Experimental: Phase 2 Cohort Expansion |
Drug: PBI-200
PBI-200 will be administered orally over continuous 28-day cycles |
- Phase 1: Number of patients with AEs [ Time Frame: Through study completion, estimated as an average of 36 months ]Severity of AEs will be assessed according to the NCI CTCAE v5.0
- Phase 1: Recommended Phase 2 Dose [ Time Frame: Approximately 12 months ]
- Phase 2: Cohort A - Overall Response Rate (ORR) [ Time Frame: Through study completion, estimated as an average of 36 months ]Assessed using Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1
- Phase 2: Cohort B - ORR [ Time Frame: Through study completion, estimated as an average of 36 months ]Assessed using Response Assessment in Neuro-Oncology (RANO) criteria
- Phase 1: Area under the plasma drug concentration-time curve from 0 to 24 hours after one dose and after 28 doses [ Time Frame: 29 days ]
- Phase 1: ORR [ Time Frame: Through study completion, estimated as an average of 36 months ]Assessed by RECIST for subjects with non-brain primary tumors and by RANO for subjects with primary brain tumors
- Duration of Response (DoR) [ Time Frame: Through study completion, estimated as an average of 36 months ]Assessed by RECIST for subjects with non-brain primary tumors and by RANO for subjects with primary brain tumors
- Progression-free Survival [ Time Frame: Through study completion, estimated as an average of 36 months ]Assessed by RECIST for subjects with non-brain primary tumors and by RANO for subjects with primary brain tumors
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
| Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | No |
Key Inclusion Criteria:
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Subject has one of the following solid tumors which has progressed on or following at least one systemic therapy regimen administered for advanced or metastatic disease or for which no approved therapy exists:
- NTRK-fusion-positive, locally advanced (i.e., not amenable to surgical resection) or metastatic solid tumor Note: Subjects with any grade of malignant glioma previously treated with systemic therapy are eligible.
Phase 1
- NTRK-gene amplified, locally advanced or metastatic solid tumor
- EWSR1-WT1-positive DSRCTs.
- Subjects with NTRK-fusion-positive solid tumors other than primary brain tumors must have previously received treatment with a TRK inhibitor, unless the subject does not have access to TRK-inhibitor therapy (e.g., no TRK inhibitor is marketed and available to the subject in the subject's country) or the subject has declined treatment with available marketed TRK inhibitors.
- Subjects with NTRK-gene amplified solid tumors, primary brain tumors or EWSR1-WT1-positive DSRCTs may have received prior treatment with a TRK inhibitor but this is not required.
Phase 2
- Has measurable disease by RECIST v1.1 for subjects with non-brain primary tumors or RANO criteria for subjects with primary brain tumors.
- Subjects with non-brain primary tumors must have previously received treatment with a TRK inhibitor and a documented resistance mutation(s) (e.g., solvent front, gatekeeper or xDFG mutation). Archival tissue from a prior biopsy taken after the subject completed TRK inhibitor treatment but prior to additional systemic therapy may be used to meet this eligibility criterion with Medical Monitor approval.
- Subjects with primary brain tumors may have received prior treatment with a TRK inhibitor but this is not required. Biopsies of brain tumors are not required for eligibility.
Key Exclusion Criteria:
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Cytotoxic chemotherapy, biologic agent, investigational agent, or radiation therapy ≤ 3 weeks prior to the first dose of PBI-200 (6 weeks for nitrosoureas).
- Subjects with either primary brain tumors or brain metastasis must have completed brain radiation therapy 12 weeks prior to the brain MRI obtained within 4 weeks of the first dose of PBI-200.
- Small-molecule kinase inhibitors or hormonal agents ≤ 14 days and within 5 half-lives prior to the first dose of PBI-200.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04901806
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| Study Director: | Chief Medical Officer | Pyramid Biosciences |
| Responsible Party: | Pyramid Biosciences |
| ClinicalTrials.gov Identifier: | NCT04901806 |
| Other Study ID Numbers: |
PBI-200-101 |
| First Posted: | May 26, 2021 Key Record Dates |
| Last Update Posted: | March 28, 2024 |
| Last Verified: | March 2024 |
| Individual Participant Data (IPD) Sharing Statement: | |
| Plan to Share IPD: | No |
| Studies a U.S. FDA-regulated Drug Product: | Yes |
| Studies a U.S. FDA-regulated Device Product: | No |
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NTRK NTRK Fusion Resistance Mutation |
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Neoplasms Brain Neoplasms Desmoplastic Small Round Cell Tumor Central Nervous System Neoplasms Nervous System Neoplasms Neoplasms by Site |
Brain Diseases Central Nervous System Diseases Nervous System Diseases Sarcoma Neoplasms, Connective and Soft Tissue Neoplasms by Histologic Type |