Aberrations of chromosome 8 in 16 breast cancer cell lines by comparative genomic hybridization, fluorescence in situ hybridization, and spectral karyotyping
J. Rummukainen et al., Aberrations of chromosome 8 in 16 breast cancer cell lines by comparative genomic hybridization, fluorescence in situ hybridization, and spectral karyotyping, CANC GENET, 126(1), 2001, pp. 1-7
Comparative genomic hybridization (CGH) studies have shown that chromosome
8 is a frequent target for chromosomal aberrations in breast cancer. We cha
racterized these aberrations of chromosome 8 in 16 breast cancer cell lines
(BT-474, BT-549, CAMA-1, DU-4475, MCF-7, MDA-MB-134, MDA-MB-157, MDA-MB-36
1, MDA-MB-415, MDA-MB-436, MPE600, SK-BR-3, T-47D, UACC-812, UACC-893 and Z
R-75-1) by CGH, fluorescence in situ hybridization (FISH) with arm- and loc
us-specific probes, and spectral karyotyping (SKY). Chromosome 8 was struct
urally abnormal in 13 of 16 cell lines. Loss of 8p was detected in nine cel
l lines, gain of entire Sq in six cell lines, 8q21-qter in three, 8q23-qter
in two, and 8q12-qter and 8p21-q21 in one cell line. Extra copies of the C
-MYC oncogene were found in 11 cell lines, but high-level amplification onl
y in SK-BR-3. Derivative chromosomes including material from chromosomes 8
were complex, and the breakpoints were strikingly dissimilar. Chromosome 11
was the most frequent translocation partner with chromosome 8 (in 7 cell l
ines). Isochromosomes and/or isoderivative Sq were found in four cell lines
. The high frequency and complexity of alterations at Sq indicate a signifi
cant pathogenetic role in breast cancer. The high-level amplification of c-
myc is less common than previously thought. (C) 2001 Elsevier Science Inc.
All rights reserved.