Format

Send to

Choose Destination
Trends Genet. 2006 Aug;22(8):447-55. Epub 2006 Jun 19.

Gene amplification in cancer.

Author information

1
Cancer Research Institute and Comprehensive Cancer Center, University of California-San Francisco, San Francisco, CA 94143, USA. albertson@cc.ucsf.edu

Abstract

Gene amplification is a copy number increase of a restricted region of a chromosome arm. It is prevalent in some tumors and is associated with overexpression of the amplified gene(s). Amplified DNA can be organized as extrachromosomal elements, as repeated units at a single locus or scattered throughout the genome. Common chromosomal fragile sites, defects in DNA replication or telomere dysfunction might promote amplification. Some regions of amplification are complex, yet elements of the pattern are reproduced in different tumor types. A genetic basis for amplification is suggested by its relative frequency in some tumor subtypes, and its occurrence in "early" preneoplastic lesions. Clinically, amplification has prognostic and diagnostic usefulness, and is a mechanism of acquired drug resistance.

PMID:
16787682
DOI:
10.1016/j.tig.2006.06.007
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center