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Metastatic melanoma is an aggressive malignancy with limited treatment options at advanced stages. Lifileucel, an FDA-approved autologous Tumor-Infiltrating Lymphocyte (TIL) therapy, marks a major advancement in immunotherapy, particularly for patients who fail conventional treatments like immune checkpoint inhibitors and targeted therapies. The mechanism of lifileucel involves the ex vivo expansion of patient-derived TILs to boost immune responses against melanoma cells. These expanded TILs are re-infused into patients, enhancing tumor-specific cytotoxicity and modulating the tumor microenvironment for sustained immune activation. Clinical trials have demonstrated its efficacy, with the overall response rate (ORR) reaching up to 36% in heavily pretreated populations, offering durable responses and improved progression-free survival compared to traditional therapies. The personalized approach of lifileucel, leveraging the patient’s own T-cell repertoire, highlights its potential for precision oncology by targeting individual tumor profiles. Its integration with combination therapies, particularly immune checkpoint inhibitors, shows promising synergistic effects, broadening its clinical applicability. In addition to clinical success, the role of lifileucel in influencing the melanogenesis pathway offers insights into optimizing therapeutic strategies for melanoma. Ongoing research focuses on enhancing TIL functionality, overcoming challenges like tumor-induced immune suppression, and extending the applicability of lifileucel to other solid tumors. This breakthrough therapy not only addresses a critical unmet need in melanoma treatment but also represents a paradigm shift toward personalized medicine in oncology. Lifileucel underscores the potential of TIL-based approaches to revolutionize cancer care, setting the stage for future advancements in immunotherapy.
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