• Nanobiotix announced final Phase 1 results showing acceptable safety and early antitumor activity for JNJ-1900 (NBTXR3) in treatment-resistant advanced melanoma.
• The 24-patient study tested the treatment with radiotherapy followed by immune checkpoint therapy; tumor responses occurred in injected and non-injected lesions.
• Results were presented at the European Society for Medical Oncology congress in Madrid on Oct. 24, 2026.
• The preliminary, single-arm findings support further evaluation in larger randomized trials.

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