title: Characterization of a newly established uterine carcinosarcoma cell line featuring the sarcomatous phenotype of the tumor in vitro.
abstract: We describe the newly established cell line CS-99 derived from a uterine carcinosarcoma retaining features of the sarcomatous phenotype in vitro. CS-99 cells exhibit a mesenchymal morphology with predominantly spindle-shaped cells at nonconfluence turning to pleomorphic appearance at confluence. The mesenchymal phenotype was evidenced immunohistochemically by strong vimentin and moderate SM-actin, which was similar to the sarcomatous component of the primary tumor. P53 was overexpressed in a subset of CS-99 cells. Epithelial membrane antigen was moderately expressed whereas other markers including pan CK, CK 5/6, CK 34, epidermal growth factor receptor, desmin, carcinoembryonic antigen, S100, KIT, ERBB2, and the hormone receptors, estrogen receptor and progesterone receptor revealed either weak or no specific staining in CS-99 cells. High self-renewal capacity corresponded to the population doubling time of 23 h in high passage. CS-99 cells were able to develop three-dimensional tumor spheroids in vitro. Cytogenetic analysis and multicolor fluorescence in situ hybridization of CS-99 demonstrated an almost stable karyotype including numerical changes +8, +18, and +20 and translocations, amongst others der(1)t(1;2), der(1)t(1;7), der(2)t(2;19), der(5)t(5;8), and der(5)t(5;14). Taken together, the cell line CS-99 exhibits strong growths dynamics and a complex but stable karyotype in higher passages, and can be further a useful in vitro model system for studying tumor biology of carcinosarcomas.
authors.affiliation: Institute of Pathology, University of Göttingen, Göttingen, Germany. hschult2@gwdg.de
authors.forename: H-J
authors.initials: HJ
authors.lastname: Schulten
authors.forename: J
authors.initials: J
authors.lastname: Wolf-Salgó
authors.forename: C
authors.initials: C
authors.lastname: Gründker
authors.forename: B
authors.initials: B
authors.lastname: Gunawan
authors.forename: L
authors.initials: L
authors.lastname: Füzesi
mesh_terms: D000368:Aged; D002296:Carcinosarcoma / Q000235:genetics / Q000473:pathology*; D045744:Cell Line, Tumor / Q000473:pathology*; D005260:Female; D006801:Humans; D010641:Phenotype; D014594:Uterine Neoplasms / Q000235:genetics / Q000473:pathology*