Genetic changes of two Wilms tumors with anaplasia and a review of the literature suggesting a marker profile for therapy resistance.
Cytogenetic data on Wilms tumors (WT) with anaplasia frequently associated with an unfavorable outcome are scarce. We present cytogenetic changes of two WT with anaplasia (primary tumor material) from nonresponders with a synopsis of the literature. The WT were investigated by cytogenetic analysis, comparative genomic hybridization, fluorescence in situ hybridization, immunofluorescence, and flow cytometric analyses. Both tumors exhibited characteristic genetic changes. One tumor was hypodiploid due to loss of entire chromosome 11; losses of 16p, 16q, 17p, chromosome 19 material, and loss of 22q12-qter. The other tumor was hyperdiploid and triploid, and displayed gain of 1q12-q23 and chromosome 9 material. Moreover, two morphological and genetically distinct cell lines have been established from both tumors, demonstrating underrepresentation of chromosomes 13, 14, 16, and 19. Karyotype descriptions of 120 WT with known clinical data together with data of this report confirm: (1) inter- and intratumor heterogeneity exists; (2) loss or underrepresentation of chromosome material at 11, 13, 14, 16, 17p, 19, and 22q in various combinations presents a new marker profile of resistance to cytotoxic agents regardless of the histological types; and (3) the prognostic impact of gain at 1q12-q23 sequences warrants further validation.
Stock
Cornelia
C
Children's Cancer Research Institute (CCRI), St. Anna Children's Hospital, Kinderspitalgasse 6, A-1090 Vienna, Austria. Stock@CCRI.univie.ac.at
Ambros
Inge M
IM
Lion
Thomas
T
Zoubek
Andreas
A
Amann
Gabriele
G
Gadner
Helmut
H
Ambros
Peter F
PF
D000782:Aneuploidy; D002454:Cell Differentiation / Q000235:genetics; D002675:Child, Preschool; D002872:Chromosome Deletion; D002877:Chromosomes, Human / Q000235:genetics* / Q000648:ultrastructure; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D017809:Fatal Outcome; D005819:Genetic Markers; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007680:Kidney Neoplasms / Q000235:genetics* / Q000473:pathology; D008297:Male; D011379:Prognosis; D017384:Sequence Deletion; D009396:Wilms Tumor / Q000235:genetics* / Q000473:pathology
D005819:Genetic Markers