Αρχική World News FDA Grants Accelerated Approval to Dostarlimab-gxly for dMMR Advanced Solid Tumours

FDA Grants Accelerated Approval to Dostarlimab-gxly for dMMR Advanced Solid Tumours

On 17 August 2021, the US Food and Drug Administration (FDA) granted accelerated approval to dostarlimab-gxly (Jemperli, GlaxoSmithKline LLC) for adult patients with mismatch repair deficient (dMMR) recurrent or advanced solid tumours, as determined by an FDA-approved test, that have progressed on or following prior treatment and who have no satisfactory alternative treatment options.

The FDA also approved the VENTANA MMR RxDx Panel as a companion diagnostic device to select patients with dMMR solid tumours for treatment with dostarlimab-gxly.

The efficacy of dostarlimab was evaluated in the GARNET (NCT02715284), a non-randomised, multicentre, open-label, multi-cohort study. The efficacy population consisted of 209 patients with dMMR recurrent or advanced solid tumours who progressed following systemic therapy and had no satisfactory alternative treatment.

The primary efficacy endpoints were overall response rate (ORR) and duration of response (DoR) as determined by blinded independent central review according to RECIST v1.1.

The ORR was 41.6% (95% confidence interval 34.9, 48.6), with 9.1% complete response rate and 32.5% partial response rate. Median DoR was 34.7 months (range, 2.6, 35.8+), with 95.4% of patients with duration ≥6 months.

Most common adverse reactions (≥20%) in patients with dMMR solid tumours are fatigue/asthenia, anaemia, diarrhoea, and nausea. Most common Grade 3 or 4 adverse reactions (≥2%) were anaemia, fatigue/asthenia, increased transaminases, sepsis, and acute kidney injury. Immune-mediated adverse reactions are also associated with dostarlimab-gxly including pneumonitis, colitis, hepatitis, endocrinopathies, nephritis and dermatologic toxicity.

The recommended dostarlimab dosage is 500 mg every 3 weeks for dose 1 through 4, as an intravenous infusion over 30 minutes. Subsequent dosing beginning 3 weeks after dose 4 is 1,000 mg every 6 weeks.

Full prescribing information for Jemperli is available here.

This indication is approved under accelerated approval based on tumour response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).

This review used the Assessment Aid, a voluntary submission from the applicant to facilitate the FDA’s assessment.

This application was granted priority review.

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 Oncology Center of Excellence Project Facilitate.

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