Skip to content

SHP2 Inhibitor BBP-398 in Combination With Sotorasib in Patients With Advanced Solid Tumors and a KRAS-G12C Mutation

A Phase 1 Study of the SHP2 Inhibitor BBP-398 (Formerly Known as IACS-15509) in Combination With the KRAS-G12C Inhibitor Sotorasib in Patients With Advanced Solid Tumors and a KRAS-G12C Mutation

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05480865
Acronym
Argonaut
Enrollment
28
Registered
2022-07-29
Start date
2022-07-06
Completion date
2024-08-22
Last updated
2024-12-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Metastatic NSCLC, Metastatic Solid Tumor, Non Small Cell Lung Cancer, Solid Tumor, Adult

Keywords

KRAS-G12C mutation, SHP2, MAPK-pathway alterations, NSCLC

Brief summary

This is a Phase 1 study of BBP-398, a SHP2 inhibitor, in combination with sotorasib, a KRAS-G12C inhibitor (KRAS-G12Ci), in patients with a KRAS-G12C mutation. The study involves 2 parts: Phase 1a Dose Escalation and Phase 1b Dose Expansion/Optimization.

Detailed description

The primary objectives for Phase 1a Dose Escalation are to evaluate safety and tolerability, and recommend a phase 1b dose (RP1bD) of the combination. The primary objectives for Phase 1b Dose Expansion/Optimization are to evaluate safety and tolerability, and the antitumor activity (defined by the ORR assessed by the investigator according to RECIST v1.1) of BBP-398 when used in combination with sotorasib across two dose regimens in patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) with a KRAS-G12C mutation and who are KRAS-G12Ci naïve, and recommend a phase 2 dose (RP2D) of the combination.

Interventions

BBP-398 administered orally

DRUGsotorasib

sotorasib administered orally

Sponsors

Amgen
CollaboratorINDUSTRY
Navire Pharma Inc., a BridgeBio company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 99 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * Patients must have histologically documented, locally advanced and unresectable, or metastatic solid tumor with documentation of a KRAS-G12C mutation within 2 years prior to screening. * Patients must have measurable disease by RECIST v1.1. * Patients must have a minimum life expectancy of \>12 weeks after start of study treatment. * Patients must have progression or disease recurrence on or after all available standard of care therapies. * Patients must have an Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0-1. * Patients must have adequate organ function. Key

Exclusion criteria

* Patients that have participated in an interventional clinical study within the last 4 weeks. * Patients that have received radiotherapy or proton therapy with a limited field of radiation for palliation within 1 week of the start of study treatment, OR radiation to more than 30% of the bone marrow or with a wide field of radiation within 4 weeks of the start of study treatment. * Patients with untreated and/or active CNS metastases. * Patients that have a history of allogenic bone marrow transplant.

Design outcomes

Primary

MeasureTime frameDescription
Phase 1a Dose Escalation Primary Objective: Incidence and Severity of Treatment-Emergent Adverse Events, Serious Adverse Events, and Dose Limiting ToxicitiesCompletion of 1 Cycle (28 days)Number of patients experiencing treatment-emergent adverse events, serious adverse events, including changes in lab parameters, vital signs and electrocardiogram changes; duration, and severity based on National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) v5.0
Phase 1b Dose Expansion/Optimization Primary Objective: Incidence and Severity of Treatment-Emergent Adverse Events, and Serious Adverse EventsCompletion of 1 Cycle (28 days)Number of patients experiencing treatment-emergent adverse events, serious adverse events, including changes in lab parameters, vital signs and electrocardiogram changes; duration, and severity based on National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) v5.0
Phase 1b Dose Expansion/Optimization Primary Objective: Overall Response Rate (ORR)8 weeksComplete Response (CR) + Partial Response (PR) rates, defined by RECIST v1.1

Secondary

MeasureTime frameDescription
Overall survival (OS)8 weeksTime from treatment start to death
Maximum Observed Plasma Concentration (Cmax) of BBP-398Cycle 2 Day 1Maximum plasma concentration of BBP-398 in combination with sotorasib
Time to Cmax (Tmax) of BBP-398Cycle 2 Day 1Amount of time to reach Cmax of BBP-398 in combination with sotorasib
Area under the plasma concentration-time curve (AUC) of BBP-398Cycle 2 Day 1Area under the plasma concentration versus time curve of BBP-398 in combination with sotorasib
Half-life (T1/2) of BBP-398Cycle 2 Day 1Terminal half-life of BBP-398 in combination with sotorasib
Phase 1a Dose Escalation Secondary Objectives: Overall Response Rate (ORR)8 weeksComplete Response (CR) + Partial Response (PR) rates, defined by RECIST v1.1
Time to Cmax (Tmax) of sotorasibCycle 2 Day 1Amount of time to reach Cmax of sotorasib in combination with BBP-398
Area under the plasma concentration-time curve (AUC) over dosing interval of sotorasibCycle 2 Day 1Area under the plasma concentration versus time curve of sotorasib in combination with BBP-398
Half-life (T1/2) of sotorasibCycle 2 Day 1Terminal half-life of sotorasib in combination with BBP-398
Circulating and intratumoral target engagement biomarkers of BBP-398 activity in combination with sotorasib24 monthsRaw, normalized, and/or baseline adjusted analyte signal
Observed Maximum Plasma Concentration (Cmax) of sotorasibCycle 2 Day 1Maximum plasma concentration of sotorasib in combination with BBP-398
Duration of response8 weeksDefined by RECIST v1.1
Progression Free Survival (PFS)8 weeksTime from treatment start to progression of disease or death by any cause

Countries

Australia, Denmark, France, Greece, Italy, Netherlands, Spain

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026