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ESMO 2025 | Phase I trial of SNV1521, a PARP1-selective inhibitor, in solid tumors

Antonio Marra, MD, European Institute of Oncology IRCCS, Milan, Italy, discusses a Phase I trial (NCT06220864) of SNV1521, a next-generation, CNS-penetrant, PARP1-selective inhibitor in patients with advanced, molecularly selected solid tumors. The study, which explored safety, pharmacokinetics, and preliminary efficacy, showed favorable tolerability, minimal hematologic toxicity, and promising anti-tumor activity across multiple BRCA- and DNA damage repair–mutated cancers. This interview took place at the European Society for Medical Oncology (ESMO) 2025 Congress in Berlin, Germany.

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Transcript

SNV1521 is a novel PARP-1 selective inhibitor and first data were presented at ESMO 20225. The study demonstrates that this novel PARP-1 selective inhibitor has an improved tolerability profile compared to first-generation PARP inhibitors. And also in terms of response, we observed that some patients, especially with alteration of the homologous recombination pathway that were not pre-exposed to PARP inhibitors, achieved very good benefit on this drug...

SNV1521 is a novel PARP-1 selective inhibitor and first data were presented at ESMO 20225. The study demonstrates that this novel PARP-1 selective inhibitor has an improved tolerability profile compared to first-generation PARP inhibitors. And also in terms of response, we observed that some patients, especially with alteration of the homologous recombination pathway that were not pre-exposed to PARP inhibitors, achieved very good benefit on this drug. And in particular, I believe that the safety profile of SME-1521 together with this preliminary sign of activity allow for further development of this drug either as monotherapy or in combination therapy with novel agents including antibody drug conjugates chemotherapy and targeted therapies.

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