KEY ELIGIBILITY CRITERIA
- Locally advanced or metastatic NSCLC
- Progressed on or after osimertinib monotherapy
(as most recent line) - Documented EGFR ex19del or L858R
- ECOG PS 0 or 1
- Asymptomatic or previously treated and stable intracranial metastases
Primary Endpoint
*Amivantamab includes both amivantamab and hyaluronidase-lpuj (RYBREVANT FASPRO™) subcutaneous injection and IV amivantamb-vmjw (RYBREVANT®). Amivantamab and hyaluronidase-lpuj has different dosing and administration instructions compared with IV amivantamab-vmjw.
†Chemotherapy is carboplatin and pemetrexed.3
‡EGFR exon 19 deletion or exon 21 L858R mutations.3
PFS across patient subgroups2
This was a prespecified analysis (except for EGFR mutation type) and was not powered to show statistical significance.
CI, confidence interval; ECOG PS, Eastern Cooperative Oncology Group performance status; EGFR, epidermal growth factor receptor; ex19del, exon 19 deletion; HR, hazard ratio; IV, intravenous; mNSCLC, metastatic non–small cell lung cancer; NSCLC, non–small cell lung cancer; PFS, progression-free survival.
Secondary Endpoints
32% of patients with RYBREVANT® + chemotherapy had a response of ≥6 months and 20% with chemotherapy alone4
This was a prespecified analysis and was not powered to show statistical significance.
At the prespecified second interim analysis of OS, with 85% of the deaths needed for the final analysis, there was no statistically significant difference in OS. The median OS was 17.7 months (95% CI: 16, 22.4) in the RYBREVANT® + chemotherapy arm and 15.3 months (95% CI: 13.7, 16.8) in the chemotherapy arm, with an HR of 0.73 (95% CI: 0.54, 0.99). Final OS analysis has not yet been formally tested.
This was a prespecified analysis and was not powered to show statistical significance.
*Defined as time from randomization until the date of objective intracranial disease progression or death, whichever comes first, based on BICR using RECIST v1.1. Specifically, intracranial disease progression is defined as having progression of brain metastasis or occurrence of new brain lesion.5
Data were only available for intracranial CRs and not available for intracranial PRs.
This was a prespecified analysis and was not powered to show statistical significance.
*Including but not limited to amivantamab-vmjw + carboplatin + pemetrexed.6
†EGFR exon 19 deletion or exon 21 L858R mutations.6
‡See the current NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for detailed recommendations, including other treatment options.
BICR, blinded independent central review; CR, complete response; icORR, intracranial overall response rate; icPFS, intracranial progression-free survival; NE, not estimable; OR, odds ratio; ORR, overall response rate; OS, overall survival; PR, partial response; RECIST, Response Evaluation Criteria in Solid Tumors.
Study Design
MARIPOSA-2 is an open-label, multicenter, phase 3 trial. Patients with asymptomatic or previously treated and stable intracranial metastases were eligible to enroll. The evaluation of efficacy relied upon comparison between RYBREVANT® in combination with chemotherapy and chemotherapy alone.
RANDOMIZATION (N=657)
RYBREVANT®
+ chemotherapy
(n=131)
Chemotherapy
(n=263)
Data
set under
investigation
RYBREVANT® as part of
another combination
regimen (n=263)
RANDOMIZATION (N=657)
RYBREVANT®
+ chemotherapy
(n=131)
Chemotherapy
(n=263)
Data
set under
investigation
RYBREVANT® as part of
another combination
regimen (n=263)
Baseline characteristics were well-balanced across treatment types2
*Other includes Black or African American, American Indian or Alaska Native, multiple, unknown, and not reported.
DOR, duration of response; MRI, magnetic resonance imaging.
Safety
ARs (≥10%) in patients in MARIPOSA-21
*Grouped terms.
Select laboratory abnormalities that worsened from baseline (≥20%) in MARIPOSA-21
Based on the pooled safety population (N=281), the most common grade 3 to 4 laboratory abnormalities (≥2%) were decreased neutrophils, decreased leukocytes, decreased platelets, decreased hemoglobin, decreased potassium, decreased sodium, increased alanine aminotransferase, increased gamma-glutamyl transferase, and decreased albumin.1
In the MARIPOSA-2 trial, most IRRs occurred during the first infusion (week 1, day 1) and rarely during subsequent infusions4
AR, adverse reaction; ILD, interstitial lung disease; IRR, infusion-related reaction.
Dose Modifications and Discontinuation Rates
*Certain types and severity of ARs require discontinuation after first occurrence.1
1L, first-line.
References: