Are chromosomal imbalances important in cancer?
Tumor-specific patterns of large-scale chromosomal imbalances characterize most forms of cancer. Based on evidence primarily from neuroblastomas, it can be argued that large-scale chromosomal imbalances are crucial for tumor pathogenesis and have an impact on the global transcriptional profile of cancer cells, and that some imbalances even initiate cancer. The genes and genetic pathways that have been dysregulated by such imbalances remain surprisingly elusive. Many genes are affected by the regions of gain and loss, and there are complex interactions and relationships that occur between these genes, hindering their identification. The study of untranslated RNA sequences, such as microRNAs, is in its infancy, and it is likely that such sequences are also dysregulated by chromosomal imbalance, contributing to pathogenesis.
Stallings
Raymond L
RL
Children's Cancer Research Institute and Department of Pediatrics, The University of Texas Health Science Center at San Antonio, 8403 Floyd Curl Drive, MC 7784, San Antonio, TX 78229-3900, USA. STALLINGS@uthscsa.edu
D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002877:Chromosomes, Human / Q000235:genetics*; D042822:Genomic Instability; D006801:Humans; D009369:Neoplasms / Q000235:genetics*