Αρχική World News FDA Grants Accelerated Approval to Amivantamab-vmjw for Metastatic NSCLC with EGFR Exon...

FDA Grants Accelerated Approval to Amivantamab-vmjw for Metastatic NSCLC with EGFR Exon 20 Insertion Mutations

On 21 May 2021, the US Food and Drug Administration (FDA) granted accelerated approval to amivantamab-vmjw (Rybrevant, Janssen Biotech, Inc.), a bispecific antibody directed against epidermal growth factor (EGF) and MET receptors, for adult patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) with epidermal growth factor receptor (EGFR) exon 20 insertion mutations, as detected by an FDA-approved test, whose disease has progressed on or after platinum-based chemotherapy.

FDA also approved the Guardant360® CDx (Guardant Health, Inc.) as a companion diagnostic for amivantamab-vmjw.

Approval was based on CHRYSALIS, a multicentre, non-randomised, open label, multicohort clinical study (NCT02609776) which included patients with locally advanced or metastatic NSCLC with EGFR exon 20 insertion mutations. Efficacy was evaluated in 81 patients with advanced NSCLC with EGFR exon 20 insertion mutations whose disease had progressed on or after platinum-based chemotherapy. Patients received amivantamab-vmjw once weekly for 4 weeks, then every 2 weeks thereafter until disease progression or unacceptable toxicity.

The main efficacy outcome measures were overall response rate (ORR) according to RECIST v1.1 as evaluated by blinded independent central review and response duration. The ORR was 40% (95% confidence interval [CI] 29%, 51%) with a median response duration of 11.1 months (95% CI 6.9, not evaluable).

The most common adverse reactions (≥ 20%) were rash, infusion-related reactions, paronychia, musculoskeletal pain, dyspnoea, nausea, fatigue, oedema, stomatitis, cough, constipation, and vomiting.

The recommended dose of amivantamab-vmjw is 1050 mg for patients with baseline body weight < 80 kg, and 1400 mg for those with body weight ≥ 80 kg, administered weekly for 4 weeks, then every 2 weeks thereafter until disease progression or unacceptable toxicity.

Full prescribing information for Rybrevant is available here.

This indication is approved under accelerated approval based on ORR and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory studies. 

This review was conducted under Project Orbis, an initiative of the FDA Oncology Center of Excellence (OCE). Project Orbis provides a framework for concurrent submission and review of oncology drugs among international partners. For this review, FDA collaborated with the Brazilian Health Regulatory Agency (ANVISA) and United Kingdom’s Medicines and Healthcare products Regulatory Agency (MHRA). The application reviews are ongoing at the other regulatory agencies. 

This review used the Assessment Aid, a voluntary submission from the applicant to facilitate the FDA’s assessment. The FDA approved this application 2 months ahead of the FDA goal date. 

This product was granted breakthrough therapy designation for this indication.

Healthcare professionals should report all serious adverse events suspected to be associated with the use of any medicine and device to FDA’s MedWatch Reporting System.

For assistance with single-patient INDs for investigational oncology products, healthcare professionals may contact FDA’s OCE Project Facilitate.

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