An Open-Label, Multicenter Study of LOXO-435 (LY3866288) In Advanced Solid Tumor Malignancies With FGFR3 Alterations

Description

The main purpose of this study is to learn more about the safety, side effects, and effectiveness of LOXO-435. LOXO-435 may be used to treat cancer of the cells that line the urinary system and other solid tumor cancers that have a change in a particular gene (known as the FGFR3 gene). Participation could last up to 30 months (2.5 years) and possibly longer if the disease does not get worse.This is an open-label, multi-center, phase 1a/b study in participants with FGFR3-altered advanced solid tumors, including metastatic urothelial cancer (UC). The study will be conducted in 2 phases: Dose escalation and dose optimization (1a) and dose expansion (1b). Phase 1a will include up to 2 cohorts to assess safety, tolerability, and pharmacokinetics of LOXO-435 to determine the recommended phase 2 dose (RP2D) (or optimal dose). Phase 1b will include 4 dose expansion cohorts of participants with prespecified activating FGFR3 alterations to evaluate the efficacy and safety of LOXO-435 at the RP2D

Trial Eligibility

Inclusion Criteria: * Have solid tumor cancer with an FGFR3 pathway alteration on molecular testing in tumor or blood sample that is deemed as actionable. * Cohort A1 (Dose Escalation): Presence of an alteration in FGFR3 or its ligands. * Cohort A2 (Dose Optimization): Histological diagnosis of urothelial cancer (UC) that is locally advanced or metastatic with a qualifying FGFR3 alteration. * Cohorts B1, B2 and B3 (Dose Expansion): Histological diagnosis of urothelial cancer that is locally advanced or metastatic with a prespecified activating FGFR3 alteration. * Cohort C (Dose Expansion): Must have histological diagnosis of a non-urothelial solid tumor malignancy that is locally advanced or metastatic with a prespecified activating FGFR3 alteration. * Measurability of disease: * Cohort A1: Measurable or non-measurable disease as defined by Response Evaluation Criteria in Solid Tumors v 1.1 (RECIST v1.1) * Cohorts A2, B1, B2, B3, and C1: Measurable disease required as defined by RECIST v1.1 * Have adequate archival tumor tissue sample available or undergo a screening biopsy if allowed per country-specific regulations. * Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. * Prior Systemic Therapy Criteria: * Cohort A1/C1: Participant has received all standard therapies for which the participant was deemed to be an appropriate candidate by the treating Investigator; OR the participant is refusing the remaining most appropriate standard of care treatment; OR there is no standard therapy available for the disease. There is no restriction on number of prior therapies. * Cohort A2/B1/B2/B3: Participants must have received at least one prior regimen in the advanced or metastatic setting. There is no restriction on number of prior therapies. * FGFR inhibitor specific requirements: * Cohort A1/A2: Prior FGFR inhibitor treatment is permitted, but not required. * Cohort B1: Participants must have been previously treated with a FGFR inhibitor. * Cohort B2, B3, C1: Participants must be FGFR inhibitor naïve. Exclusion Criteria: * Participants with primary central nervous system (CNS) malignancy. * Known or suspected history of uncontrolled CNS metastases. * Current evidence of corneal keratopathy or retinal disorder. * Have a history and/or current evidence of extensive tissue calcification. * Any serious unresolved toxicities from prior therapy. * Significant cardiovascular disease. * Prolongation of the QT interval corrected for heart rate using Fridericia's formula (QTcF). * Active uncontrolled systemic infection or other clinically significant medical conditions. * Participants who are pregnant, lactating, or plan to breastfeed during the study or within 6 months of the last dose of study treatment. Participants who have stopped breastfeeding may be enrolled.

Study Info

Interventions

Locations Recruiting

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