Low frequency of genetic lesions in Wilms tumors by representational difference analysis.
Genomic representational difference analysis (RDA) was carried out on a total of nine Wilms tumors and one cystic partially differentiated nephroblastoma (CPDN; a sub-type of Wilms) to look for novel genetic deletions involving tumor suppressor genes. Genomic DNA from either short-term cultured Wilms tumor cells or a WT xenograft was used to create driver representations, and genomic DNA from matched normal kidney or normal kidney cells grown in short-term culture was used to create the tester. Genuine difference products were obtained from only one of the tumors. However, none of these fragments were found to be deleted in the original tumor biopsy, microdissected tumor or in the lung metastasis from this patient. It is, therefore, likely that the deletions were due to random losses associated with the genetic instability of the cultured cells from this particular tumor. We did not isolate difference products from any of the other tumors, showing that they did not have chromosomal losses, homozygous deletions or regions of LOH that were detectable by RDA.
Cummings
M
M
CLIC Research Unit, Department of Pathology and Microbiology, School of Medical Sciences, University of Bristol, University Walk, Bristol, BS8 1TD, UK.
Brown
K W
KW
D000818:Animals; D002648:Child; D002675:Child, Preschool; D002874:Chromosome Mapping; D002880:Chromosomes, Human, Pair 11; D002897:Chromosomes, Human, Pair 7; D005260:Female; D016162:Genes, Wilms Tumor; D006801:Humans; D007223:Infant; D007621:Karyotyping; D007668:Kidney / Q000473:pathology; D007680:Kidney Neoplasms / Q000235:genetics* / Q000473:pathology; D019656:Loss of Heterozygosity; D008297:Male; D051379:Mice; D008819:Mice, Nude; D016133:Polymerase Chain Reaction; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured; D009396:Wilms Tumor / Q000235:genetics* / Q000473:pathology