Αρχική World News FDA Grants Accelerated Approval to Loncastuximab Tesirine-lpyl for Large B-Cell Lymphoma

FDA Grants Accelerated Approval to Loncastuximab Tesirine-lpyl for Large B-Cell Lymphoma

On 23 April 2021, the US Food and Drug Administration (FDA) granted accelerated approval to loncastuximab tesirine-lpyl (Zynlonta, ADC Therapeutics SA), a CD19-directed antibody and alkylating agent conjugate, for adult patients with relapsed or refractory large B-cell lymphoma after two or more lines of systemic therapy, including diffuse large B-cell lymphoma (DLBCL) not otherwise specified, DLBCL arising from low grade lymphoma, and high-grade B-cell lymphoma. 

Approval was based on LOTIS-2 (NCT03589469), an open-label, single-arm study in 145 adult patients with relapsed or refractory DLBCL or high-grade B-cell lymphoma after at least two prior systemic regimens. Patients received loncastuximab tesirine-lpyl 0.15 mg/kg every 3 weeks for 2 cycles, then 0.075 mg/kg every 3 weeks for subsequent cycles. Patients received treatment until progressive disease or unacceptable toxicity. 

The main efficacy outcome measure was overall response rate (ORR), as assessed by an independent review committee using Lugano 2014 criteria. The ORR was 48.3% (95% confidence interval [CI] 39.9, 56.7) with a complete response rate of 24.1% (95% CI 17.4, 31.9). 

After a median follow-up of 7.3 months, median response duration was 10.3 months (95% CI 6.9, NE). Of the 70 patients who achieved objective responses, 36% were censored for response duration prior to 3 months. 

Most common (≥20%) adverse reactions in patients receiving loncastuximab tesirine-lpyl, including laboratory abnormalities, are thrombocytopenia, increased gamma-glutamyltransferase, neutropenia, anaemia, hyperglycaemia, transaminase elevation, fatigue, hypoalbuminemia, rash, oedema, nausea, and musculoskeletal pain. 

The prescribing information provides warnings and precautions for adverse reactions including oedema and effusions, myelosuppression, infections, and cutaneous reactions. 

The recommended loncastuximab tesirine-lpyl dosage is 0.15 mg/kg every 3 weeks for 2 cycles, then 0.075 mg/kg every 3 weeks for subsequent cycles, by intravenous infusion over 30 minutes on day 1 of each cycle (every 3 weeks). Patients should be premedicated with dexamethasone 4 mg orally or intravenously twice daily for 3 days beginning the day before loncastuximab tesirine-lpyl. 

Full prescribing information for Zynlonta is available here

This indication is approved under accelerated approval based on ORR. 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 and orphan drug designation. 

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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