Description:
The reason for this study is to see if the study drug selpercatinib is safe and more
effective compared to a standard treatment in participants with rearranged during
transfection (RET)-mutant medullary thyroid cancer (MTC) that cannot be removed by surgery or
has spread to other parts of the body. Participants who are assigned to the standard
treatment and discontinue due to progressive disease have the option to potentially crossover
to selpercatinib.
Title
- Brief Title: A Study of Selpercatinib (LY3527723) in Participants With RET-Mutant Medullary Thyroid Cancer
- Official Title: A Multicenter, Randomized, Open-label, Phase 3 Trial Comparing Selpercatinib to Physicians Choice of Cabozantinib or Vandetanib in Patients With Progressive, Advanced, Kinase Inhibitor Naïve, RET-Mutant Medullary Thyroid Cancer (LIBRETTO-531)
Clinical Trial IDs
- ORG STUDY ID:
17478
- SECONDARY ID:
J2G-MC-JZJB
- SECONDARY ID:
2019-001978-28
- NCT ID:
NCT04211337
Conditions
Interventions
Drug | Synonyms | Arms |
---|
Selpercatinib | LY3527723, LOXO-292 | Selpercatinib |
Cabozantinib | | Cabozantinib or Vandetanib |
Vandetanib | | Cabozantinib or Vandetanib |
Purpose
The reason for this study is to see if the study drug selpercatinib is safe and more
effective compared to a standard treatment in participants with rearranged during
transfection (RET)-mutant medullary thyroid cancer (MTC) that cannot be removed by surgery or
has spread to other parts of the body. Participants who are assigned to the standard
treatment and discontinue due to progressive disease have the option to potentially crossover
to selpercatinib.
Trial Arms
Name | Type | Description | Interventions |
---|
Selpercatinib | Experimental | Selpercatinib given orally. | |
Cabozantinib or Vandetanib | Active Comparator | Cabozantinib or vandetanib given orally. | |
Eligibility Criteria
- At least 18 years of age (participants as young as 12 years of age will be allowed if
permitted by local regulatory authorities).
- Histologically or cytologically confirmed, unresectable, locally advanced and/or
metastatic MTC and no prior history of treatment with kinase inhibitors for
advanced/metastatic disease.
- Radiographic progressive disease per Response Evaluation Criteria in Solid Tumors
(RECIST) 1.1 at screening compared with a previous image taken within the prior 14
months as assessed by the BICR. Participants with measurable or non-measurable but
evaluable disease are eligible; however, participants with non-measurable disease may
not have disease limited to bone sites only.
- A defined/acceptable RET gene alteration identified in a tumor, germline
deoxyribonucleic acid (DNA) or blood sample.
- Tumor tissue in sufficient quantity to allow for retrospective central analysis
of RET mutation status
- Eastern Cooperative Oncology Group performance status score of 0 to 2.
- Adequate hematologic, hepatic, and renal function and electrolytes.
- Men and women of childbearing potential must agree to use a highly effective
contraceptive method during treatment with study drug and for 4 months following the
last dose of study drug.
- Ability to swallow capsules.
Exclusion Criteria:
- An additional validated oncogenic driver in MTC if known that could cause resistance
to selpercatinib treatment. Examples include, but are not limited to RAS or BRAF gene
mutations and NTRK gene fusions.
- Symptomatic central nervous system (CNS) metastases, leptomeningeal carcinomatosis, or
untreated spinal cord compression.
- Clinically significant active cardiovascular disease or history of myocardial
infarction within 6 months, history of Torsades de pointes, or prolongation of the
QTcF >470 milliseconds on more than one electrocardiogram (ECG) during screening.
Participants who are intended to receive vandetanib if randomized to the control arm
ineligible if QTcF is >450 milliseconds.
- Active uncontrolled systemic bacterial, viral, or fungal infection or serious ongoing
uncontrolled intercurrent illness.
- Active hemorrhage or at significant risk for hemorrhage.
- Other malignancy unless nonmelanoma skin cancer, carcinoma in situ or malignancy
diagnosed ≥2 years previously and not currently active. Participants with multiple
endocrine neoplasia type 2 (MEN2) associated pheochromocytoma may be eligible.
Maximum Eligible Age: | N/A |
Minimum Eligible Age: | 12 Years |
Eligible Gender: | All |
Healthy Volunteers: | No |
Primary Outcome Measures
Measure: | Treatment Failure-Free Survival (TFFS) by Blinded Independent Committee Review (BICR) |
Time Frame: | Baseline to Progressive Disease, Unacceptable Toxicity or Death from Any Cause (Estimated at up to 30 Months) |
Safety Issue: | |
Description: | TFFS by BICR |
Secondary Outcome Measures
Measure: | Progression Free Survival (PFS) by BICR |
Time Frame: | Baseline to Progressive Disease or Death from Any Cause (Estimated at up to 30 Months) |
Safety Issue: | |
Description: | PFS by BICR |
Measure: | Overall Response Rate (ORR): Percentage of Participants with Complete Response (CR) or Partial Response (PR) by BICR |
Time Frame: | Baseline through Disease Progression or Death (Estimated at up to 30 Months) |
Safety Issue: | |
Description: | ORR: Percentage of Participants with CR or PR by BICR |
Measure: | Duration of Response (DoR) by BICR |
Time Frame: | Date of CR or PR to Date of Disease Progression or Death Due to Any Cause (Estimated at up to 30 Months) |
Safety Issue: | |
Description: | DoR by BICR |
Measure: | Overall Survival (OS) |
Time Frame: | Baseline to Date of Death from Any Cause (Estimated at up to 60 Months) |
Safety Issue: | |
Description: | OS |
Measure: | PFS2 by Investigator |
Time Frame: | Baseline to Second Disease Progression or Death from Any Cause (Estimated at up to 48 Months) |
Safety Issue: | |
Description: | PFS2 by Investigator |
Measure: | Comparative Tolerability: Percentage of Time with High Side Effect Bother Based on the Functional Assessment of Cancer Therapy-Side Effects (FACT-GP5) |
Time Frame: | Baseline to Progressive Disease, Unacceptable Toxicity or Death from Any Cause (30 months) |
Safety Issue: | |
Description: | FACT-G is a validated instrument used to measure quality of life (QOL) in participants with cancer. The single FACT-G item, GP5, "I am bothered by side effects of treatment," is a summary measure of the overall impact of treatment toxicity, based upon its association with the number and degree of adverse events in clinical trials. It uses a 5-point rating scale (0="not at all" and 4=equals "very much"). Higher GP5 scores indicates more bother from side effects |
Measure: | The Concordance of the Local Lab and the Central Lab RET Results: Percentage of Participants with RET-Positive Specimens as Called by the Central Lab, which is also RET-Positive as Called by a Local Lab (Positive Percent Agreement) |
Time Frame: | Baseline |
Safety Issue: | |
Description: | The Concordance of the Local Lab and the Central Lab RET Results: Percentage of Participants with RET-Positive Specimens as Called by the Central Lab, which is also RET-Positive as Called by a Local Lab (Positive Percent Agreement) |
Details
Phase: | Phase 3 |
Primary Purpose: | Interventional |
Overall Status: | Recruiting |
Lead Sponsor: | Loxo Oncology, Inc. |
Trial Keywords
- medullary thyroid carcinoma
- targeted therapy
Last Updated
August 18, 2021