Patients with SCLC or extrapulmonary high grade neuroendocrine carcinomas with progression on or after platinum-based chemotherapy will be enrolled on this multi-center, single-arm phase II study.~Patients must have histologically proven metastatic/unresectable SCLC or extrapulmonary G3 NEC (Ki-67 index > 20% with poorly differentiated histology), or metastatic/unresectable prostate or bladder cancer with high-grade neuroendocrine or small cell component. Patients must have received at least 1, but no more than 3 prior lines of therapy, which must include a platinum based agent. Patients will be treated with iadademstat given at a dose of 150 microgram PO administered on a 5 day on-2 day off schedule every week and weekly paclitaxel at a dose of 80 mg/m2 IV). This fix dose of 150 microgram (liquid formulation) is in line with the 90 mg /m2/d BSA adjusted dose selected as RP2D in a 5d on, 2d off weekly schedule for iadademstat liquid formulation in combination with azacitidine per the ALICE AML Ph2 trial that showed to consistently achieve on average 90% target engagement. A safety lead-in phase with 12 patients will be conducted and these patients will be included in the final analysis.~total of 42 patients with SCLC (21 patients) and G3 NEC (21 patients) will be enrolled (including those enrolled in the safety lead-in portion).
This is a non-randomized single-arm, two cohorts, phase II study of iadademstat in combination with weekly paclitaxel in patients with relapse/refractory SCLC or extrapulmonary G3 Neuroendocrine Carcinomas. A total of 42 patients with SCLC (21 patients) and G3 NEC (21 patients) will be enrolled (including those enrolled in the safety lead-in portion).