Establishment and characterization of a novel cell line, NCC-DDLPS2-C1, derived from a patient with dedifferentiated liposarcoma.

Dedifferentiated liposarcoma (DDLPS) is a highly aggressive subtype of liposarcoma that is histologically a transition form between an atypical lipomatous tumor/well-differentiated liposarcoma and a non-lipogenic sarcoma. DDLPS is genetically characterized by a complex karyotype with copy number variations and genomic complexity. DDLPS has a poor prognosis, a high local recurrence rate, and refractory behaviors for chemotherapy and radiation, which indicate a requirement for a novel therapeutic strategy for better clinical outcomes. We report here, a novel DDLPS cell line (NCC-DDLPS2-C1) developed from a tumor tissue. NCC-DDLPS2-C1 cells showed an amplified 12q13-15 region and exhibited constant growth, spheroid formation, and invasion. High-throughput drug screening revealed distinct sensitivity between monolayer- and three-dimensional cells. Romidepsin and trabectedin especially showed high anti-proliferative effects in both culture methods of NCC-DDLPS2-C1. Thus, the NCC-DDLPS2-C1 cell line may serve as a useful resource for DDLPS studies.