RT Journal Article T1 Randomized Phase II Study of Paclitaxel plus Alisertib versus Paclitaxel plus Placebo as Second-Line Therapy for SCLC: Primary and Correlative Biomarker Analyses. A1 Owonikoko, Taofeek K A1 Niu, Huifeng A1 Nackaerts, Kristiaan A1 Csoszi, Tibor A1 Ostoros, Gyula A1 Mark, Zsuzsanna A1 Baik, Christina A1 Joy, Anil Abraham A1 Chouaid, Christos A1 Jaime, Jesus Corral A1 Kolek, Vitezslav A1 Majem, Margarita A1 Roubec, Jaromir A1 Santos, Edgardo S A1 Chiang, Anne C A1 Speranza, Giovanna A1 Belani, Chandra P A1 Chiappori, Alberto A1 Patel, Manish R A1 Czebe, Krisztina A1 Byers, Lauren A1 Bahamon, Brittany A1 Li, Cong A1 Sheldon-Waniga, Emily A1 Kong, Eric F A1 Williams, Miguel A1 Badola, Sunita A1 Shin, Hyunjin A1 Bedford, Lisa A1 Ecsedy, Jeffrey A A1 Bryant, Matthew A1 Jones, Sian A1 Simmons, John A1 Leonard, E Jane A1 Ullmann, Claudio Dansky A1 Spigel, David R A1 C14018 study investigators, K1 Alisertib K1 Aurora A kinase K1 Paclitaxel K1 Phase II K1 SCLC AB We assessed the Aurora A kinase inhibitor, alisertib, plus paclitaxel (henceforth referred to as alisertib/paclitaxel) as second-line treatment for SCLC. In this double-blind study, patients with relapsed or refractory SCLC were stratified by relapse type (sensitive versus resistant or refractory) and brain metastases and randomized 1:1 to alisertib/paclitaxel or placebo plus paclitaxel (henceforth referred to as placebo/paclitaxel) in 28-day cycles. The primary end point was progression-free survival (PFS). Associations of c-Myc expression in tumor tissue (prespecified) and genetic alterations in circulating tumor DNA (retrospective) with clinical outcome were evaluated. A total of 178 patients were enrolled (89 in each arm). The median PFS was 3.32 months with alisertib/paclitaxel versus 2.17 months with placebo/paclitaxel (hazard ratio [HR] = 0.77, 95% confidence limit [CI]: 0.557-1.067, p = 0.113 in the intent-to-treat population versus HR = 0.71, 95% CI: 0.509-0.985, p = 0.038 with corrected analysis applied). Among 140 patients with genetic alternations, patients with cell cycle regulator mutations (cyclin-dependent kinase 6 gene [CDK6], retinoblastoma-like 1 gene [RBL1], retinoblastoma-like 2 gene [RBL2], and retinoblastoma 1 gene [RB1]) had significantly improved PFS with alisertib/paclitaxel versus with placebo/paclitaxel (3.68 versus 1.80 months, respectively [HR = 0.395, 95% CI: 0.239-0.654, p = 0.0003]), and overall survival (7.20 versus 4.47 months, respectively [HR = 0.427, 95% CI: 0.259-0.704, p = 0.00085]). A subset of patients with c-Myc expression showed significantly improved PFS with alisertib/paclitaxel. The incidence of grade 3 or higher drug-related adverse events was 67% (58 patients) with alisertib/paclitaxel versus 22% (25 patients) with placebo/paclitaxel. Twelve patients (14%) versus 11 (12%) died on study, including four versus zero treatment-related deaths. Efficacy signals were seen with alisertib/paclitaxel in relapsed or refractory SCLC. c-Myc expression and mutations in cell cycle regulators may be potential predictive biomarkers of alisertib efficacy; further prospective validations are warranted. YR 2019 FD 2019-10-23 LK http://hdl.handle.net/10668/15444 UL http://hdl.handle.net/10668/15444 LA en DS RISalud RD Apr 7, 2025