title: Newly established clear cell sarcoma (malignant melanoma of soft parts) cell line expressing melanoma-associated Melan-A antigen and overexpressing C-MYC oncogene.
abstract: Clear cell sarcoma (CCS), malignant melanoma of soft parts, is a rare malignant tumor with a poor prognosis. In this study, a CCS cell line, designated MP-CCS-SY, was established from a metastatic tumor of a 17-year-old Japanese girl that originated in the left Achilles tendon. A small number of melanosomes were detected in the cytoplasm by electron microscopy. The melanosomes immunoreacted with two melanoma-associated antibodies, HMB45 and Melan-A. A Western blot demonstrated the existence of a Melan-A antigen in this cell line. Although a t(12;22)(q13;q12), which is characteristic of CCS, was not identified by a chromosomal analysis with conventional banding techniques, fluorescence in situ hybridization analysis with painting probes of chromosomes 12 and 22 revealed the insertion of a chromosome 12 fragment into one of the long arms of chromosome 22. The chimeric EWS/ATF1 transcript was detected by the reverse transcriptase polymerase chain reaction. Extra copies and structural abnormalities of chromosome 8 were observed. Overexpression of c-myc mRNA was detected by Northern blot analysis and may have a role in malignant progression of CCS. The availability of this MP-CCS-SY cell line will help to understand the molecular biology of this malignancy and should be useful as a tool for developing an immunotherapy.
authors.affiliation: Department of Pediatrics, Miyazaki Medical College, 5200 Kihara, Kiyotake, Miyazaki, Japan. moritake@fc.miyazaki-med.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Moritake
authors.forename: Tohru
authors.initials: T
authors.lastname: Sugimoto
authors.forename: Yujiro
authors.initials: Y
authors.lastname: Asada
authors.forename: Mitsuaki A
authors.initials: MA
authors.lastname: Yoshida
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Maehara
authors.forename: Alan L
authors.initials: AL
authors.lastname: Epstein
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kuroda
mesh_terms: D000125:Achilles Tendon / Q000473:pathology; D000293:Adolescent; D000951:Antigens, Neoplasm; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics / Q000648:ultrastructure; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics / Q000648:ultrastructure; D002898:Chromosomes, Human, Pair 8 / Q000235:genetics / Q000648:ultrastructure; D018450:Disease Progression; D017809:Fatal Outcome; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D016259:Genes, myc; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D058965:MART-1 Antigen; D020460:Melanosomes / Q000737:chemistry / Q000648:ultrastructure; D016254:Mutagenesis, Insertional; D009363:Neoplasm Proteins / Q000096:biosynthesis* / Q000235:genetics; D015514:Oncogene Proteins, Fusion / Q000235:genetics; D016271:Proto-Oncogene Proteins c-myc / Q000096:biosynthesis*; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D012334:RNA, Neoplasm / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018227:Sarcoma, Clear Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D014157:Transcription Factors; D014407:Tumor Cells, Cultured / Q000378:metabolism
chemical_list: D000951:Antigens, Neoplasm; C111598:EWS-ATF1 fusion protein, human; D058965:MART-1 Antigen; C548667:MLANA protein, human; D009363:Neoplasm Proteins; D015514:Oncogene Proteins, Fusion; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D014157:Transcription Factors