Roughly 35 years after early patient data suggested the potential of tumor-infiltrating lymphocytes (TIL) in cancer, Iovance Biotherapeutics Inc. received U.S. FDA approval for lifileucel, marking both the first autologous TIL cell therapy for commercial use and the first one-time cell therapy for a solid tumor cancer. Branded Amtagvi, lifileucel is cleared for use in patients with unresectable or metastatic melanoma previously treated with a PD-1 blocking antibody, and if BRAF V600 mutation-positive, a BRAF inhibitor with or without a MEK inhibitor

Although treatment outcomes have improved in metastatic melanoma since the use of immune checkpoint blockade (ICB), it still remains a medical challenge. Melanoma cells are thought to adapt several phenotypic states, such as mesenchymal-like state (MES), which may modulate their sensitivity to therapy. An international team of researchers has now investigated the mechanisms behind melanoma cells’ resistance to ICB.

Replimune Group Inc.’s lead candidate, RP-1 (vusolimogene oderparepvec), took a solid hit as it missed both primary endpoints in the Cerpass phase II study of skin cancer. Despite some better results from the study and good news from other studies along with a plan to drop some programs, the company’s stock still suffered.

Researchers from Multitude Therapeutics Inc. have reported the preclinical profile of AMT-253, a MUC18-targeting antibody-drug conjugate (ADC) under development for the treatment of melanoma. It comprises the anti-MUC18 humanized antibody pAb253-H linked to T1000 exatecan payload and showed superior antitumor efficacy than the traditional vc-MMAE-based ADC AMT-253-M.