A Study of Valemetostat Tosylate Plus Pembrolizumab Versus Pembrolizumab Alone in First-Line NSCLC Without Actionable Genomic Alterations — StellaPhase 1 — Early testing in a small group of people (usually 20–80) to evaluate safety, determine safe dosage, and identify side effects.
Trial locations(45 sites)
United States
University of California San Diego (Ucsd)-Moores Cancer Center, La Jolla, California California Research Institute, Los Angeles, California Valkyrie Clinical Trials, Los Angeles, California Mayo Clinic Hospital, Jacksonville, Florida BRCR Global, Plantation, Florida University of Kentucky Medical Center, Lexington, Kentucky Pikeville Medical Center, Pikeville, Kentucky Mayo Clinic - Rochester, Rochester, Minnesota Columbia University Irving Medical Center, New York, New York Montefiore Medical Center, The Bronx, New York Thomas Jefferson University, Sidney Kimmel Cancer Center, Philadelphia, Pennsylvania Virginia Cancer Specialist, Fairfax, Virginia Argentina
Hospital Italiano de Buenos Aires, Buenos Aires Instituto Alexander Fleming, Buenos Aires Sanatorio Allende, Córdoba Fundacion Ars Medica, N Salvador de Jujuy Centro de Investigacion Pergamino Sa, Pergamino Instituto Medico de La Fundacion Estudios Clinicos, Rosario Clinica Viedma S.A., Viedma Brazil
Centro de Pesquisas Clinica Reichow, Blumenau Clínica de Neoplasias Litoral Ltda., ItajaĂ- CINPAM Centro Integrado De Pesquisa Da Amazonia, Manaus Liga Norte-Rio-Grandense Contra o Câncer, Natal Hospital Nossa Senhora da Conceicao, Porto Alegre Cepho - Centro de Estudos E Pesquisas de Hematologia E Oncologia, Santo André Fundacao Faculdade Regional de Medicina de Sao Jose Do Rio Preto, Sao Jose Rio Preto China
Jilin Cancer Hospital, Changchun The First Hospital of Jilin University, Changchun Chengdu Shang Jin Nan Fu Hospital, Chengdu Sir Run Run Shaw Hospital, Zhejiang University, School of Medicine, Hangzhou Harbin Medical University Cancer Hospital, Harbin Jiamusi Cancer Hospital, Jiamusi Shanghai East Hospital, Shanghai The First Hospital of China Medical University, Shenyang Tianjin Medical University Cancer Institute & Hospital, Tiyuan Henan Cancer Hospital, Zhengzhou Japan
Kyushu University Hospital, Fukuoka National Cancer Center Hospital East, Kashiwa Cancer Institute Hospital of JFCR, Kōtoku NHO Nagoya Medical Center, Nagoya Kitasato University Hospital, Sagamihara-shi South Korea
Severance Hospital, Yonsei University Health System, Seoul Samsung Medical Center, Seoul Seoul National University Hospital, Seoul The Catholic University of Korea, St. Vincent'S Hospital, Suwon Last updated October 2025