Supporting their conclusions with data from the same phase III study, the EMA’s Committee for Medicinal Products for Human Use adopted a positive opinion for extending the use of Oncopeptides AB’s Pepaxti (melflufen) to earlier lines of treating relapsed, refractory multiple myeloma even as the FDA dug in its heels about withdrawing the drug from the U.S. market.
Peptide-drug conjugates are an emerging class of molecules that allow efficient targeted drug delivery into tumors. Researchers from Oncopeptides AB and their collaborators presented data on the novel peptide-drug conjugate OPDC3, which has a novel alkylating payload, in models of diffuse large B-cell lymphoma (DLBCL) and acute myeloid leukemia (AML).
Shares of Oncopeptides AB dropped 35% Dec. 7 on the U.S. FDA’s request to withdraw marketing authorization of Pepaxto (melflufen), a drug that had gained accelerated approval in early 2021 for use in relapsed/refractory multiple myeloma. The move followed a negative advisory committee vote in September 2022 and is based on the outcome of the confirmatory phase III Ocean study.
The U.S. FDA’s Oncologic Drugs Advisory Committee (ODAC) took up the matter of Oncopeptides AB’s long-storied multiple myeloma (MM) drug, Pepaxto (melphalan flufenamide), and briefing documents ahead of the meeting – which provided little cause for optimism – proved predictive of ODAC’s vote. Shares of Oncopeptides (Stockholm:ONCO) have dropped more than 64% over the past five days as investor jitters worsened.
The fate of three cancer drugs, and possibly the future financial health of their sponsors, could be on the line Sept. 22 and 23 as the U.S. FDA’s Oncologic Drugs Advisory Committee (ODAC) takes a hard look at the safety-efficacy data for Spectrum Pharmaceuticals Inc.’s Pozenveo, Oncopeptides AB’s Pepaxto and Secura Bio Inc.’s Copiktra. First up in the triple-header is Pozenveo (poziotinib), which is seeking accelerated approval as a second-line treatment for patients with locally advanced or metastatic non-small-cell lung cancer harboring HER2 exon 20 insertion mutations confirmed by an FDA-approved test.
Continuing its evaluation of cancer drugs already on the U.S. market, the FDA will convene its Oncologic Drugs Advisory Committee (ODAC) Sept. 22 and 23 to consider two more approved drugs – Oncopeptides AB’s Pepaxto (melphalan flufenamide) and Secura Bio Inc.’s Copiktra (duvelisib).
In late February 2021, Oncopeptides AB scored a big win on the FDA’s accelerated approval for the first cancer peptide-drug conjugate, Pepaxto (melphalan flufenamide), in multiple myeloma. Less than eight months later, it was shutting down commercial operations and heading back to the drawing board after safety issues emerging in the confirmatory Ocean study prompted the Stockholm-based firm to pull Pepaxto from the market, just ahead of what was likely to be a negative FDA advisory panel vote.
DUBLIN – Oncopeptides AB has withdrawn its troubled multiple myeloma
drug Pepaxto (melphalan flufenamide) from the U.S. market, less than eight months after receiving an accelerated approval from the FDA. The move comes less than a week before the FDA’s Oncologic Drugs Advisory Committee was due to consider the drug’s safety profile because of data anomalies that surfaced over the summer.
Another shoe dropped on Oncopeptides AB when the U.S. FDA issued an alert July 28 citing trial data showing an increased risk of death with the company’s only marketed drug, Pepaxto, used in combination with dexamethasone to treat multiple myeloma. The agency said it’s continuing to evaluate the Ocean trial results and may hold a public meeting to discuss the safety findings and explore the continued marketing of Pepaxto (melphalan flufenamide), which was granted accelerated approval in February as a fifth-line treatment for relapsed or refractory multiple myeloma.