title: Recurrent DNA sequence copy losses on chromosomal arm 6q in capillary hemangioblastoma.
abstract: Capillary hemangioblastomas (CHB) of the central nervous system, the most common tumor in von Hippel-Lindau (VHL) disease, usually show mutations in the VHL tumor suppressor gene on chromosome 3p25-p26. Because little is known concerning the cytogenetic changes in these tumors, we studied 22 cases through comparative genomic hybridization to screen for DNA copy number changes in both sporadic and VHL-associated CHB. Our analysis revealed that 6 of 22 samples (27%) contained DNA copy number losses, whereas no gains were observed. The most recurrent finding was loss of chromosomal arm 6q, seen in five cases. In two of these cases also loss of chromosome 3 was noted. The third aberration observed was loss of chromosome 8, seen in one case. No differences were noted between VHL-associated and sporadic tumors, nor did the cytogenetic aberrations correlate with the clinical outcome. The loss of 6q, seen in this study and previously in other VHL-associated tumors (renal cell carcinomas and pheochromocytomas) and other tumors, suggest that this chromosome area may contain tumor suppressor genes involved in the early steps of tumorigenesis.
authors.affiliation: Department of Pathology, Haartman Institute and Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland.
authors.forename: Sebsebe
authors.initials: S
authors.lastname: Lemeta
authors.forename: Yan
authors.initials: Y
authors.lastname: Aalto
authors.forename: Mika
authors.initials: M
authors.lastname: Niemelä
authors.forename: Juha
authors.initials: J
authors.lastname: Jääskeläinen
authors.forename: Markku
authors.initials: M
authors.lastname: Sainio
authors.forename: Juha
authors.initials: J
authors.lastname: Kere
authors.forename: Sakari
authors.initials: S
authors.lastname: Knuutila
authors.forename: Tom
authors.initials: T
authors.lastname: Böhling
mesh_terms: D000328:Adult; D000368:Aged; D001483:Base Sequence; D002528:Cerebellar Neoplasms / Q000235:genetics*; D002869:Chromosome Aberrations; D002896:Chromosomes, Human, Pair 6 / Q000235:genetics*; D004273:DNA, Neoplasm / Q000235:genetics*; D005091:Exons / Q000235:genetics; D005260:Female; D016147:Genes, Tumor Suppressor; D018325:Hemangioblastoma / Q000235:genetics*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D009364:Neoplasm Recurrence, Local / Q000235:genetics; D017384:Sequence Deletion / Q000235:genetics*; D006623:von Hippel-Lindau Disease / Q000235:genetics
chemical_list: D004273:DNA, Neoplasm