title: Establishment and characterization of a novel human desmoplastic small round cell tumor cell line, JN-DSRCT-1.
abstract: The exact nature of the desmoplastic small round cell tumor (DSRCT) remains controversial. More detailed analyses might be facilitated by the establishment of permanent DSRCT cell lines. To date, however, no human DSRCT cell line has been reported. In this study, we report the establishment of a new human cell line, JN-DSRCT-1, from the pleural effusion of a 7-year-old boy with pulmonary metastasis from a typical intra-abdominal DSRCT. JN-DSRCT-1 cells were small round or spindle shaped with oval nuclei and have been maintained continuously in vitro for over 190 passages during more than 40 months. Histologic features of the heterotransplanted tumors in severe combined immunodeficiency mouse were essentially the same as those of the original DSRCT, revealing nests or clusters of small round cells embedded in an abundant desmoplastic stroma. Both in vitro and in vivo, the cells exhibited immunopositive reactions for vimentin, desmin, cytokeratins (AE1/AE3 and CAM 5.2), epithelial membrane antigen, neuron-specific antigen, and CD57 (Leu-7). JN-DSRCT-1 cells exhibited a pathognomonic t(11;22)(p13;q12) translocation by cytogenetic analysis. In addition, RT-PCR and sequencing analysis revealed a chimeric transcriptional message of the Ewing's sarcoma gene exon 10 fused to the Wilms' tumor gene exon 8. To our knowledge, this is the first permanent human DSRCT cell line. The JN-DSRCT-1 cell line, which exhibits the unique morphologic and genetic characteristics of DSRCT, will be extremely useful for a variety of important studies such as the pathogenic mechanism, biologic behavior, and therapeutic model of human DSRCT.
authors.affiliation: Department of Pathology, School of Medicine, Fukuoka University, Fukuoka, Japan. nishio@minf.med.fukuoka-u.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Nishio
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iwasaki
authors.forename: Masako
authors.initials: M
authors.lastname: Ishiguro
authors.forename: Yuko
authors.initials: Y
authors.lastname: Ohjimi
authors.forename: Chikako
authors.initials: C
authors.lastname: Fujita
authors.forename: Fumio
authors.initials: F
authors.lastname: Yanai
authors.forename: Keiko
authors.initials: K
authors.lastname: Nibu
authors.forename: Akihisa
authors.initials: A
authors.lastname: Mitsudome
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kaneko
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kikuchi
mesh_terms: D000008:Abdominal Neoplasms / Q000235:genetics / Q000473:pathology*; D000818:Animals; D018288:Carcinoma, Small Cell / Q000235:genetics / Q000473:pathology*; D002648:Child; D006801:Humans; D008297:Male; D051379:Mice; D016513:Mice, SCID; D009368:Neoplasm Transplantation; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014178:Translocation, Genetic; D014407:Tumor Cells, Cultured / Q000473:pathology*