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- W2026966628 abstract "Neuroblastoma is a tumor of infancy that presents several chromosomal abnormalities. Nonrandom deletion of chromosome arm 9p has been identified in primary neuroblastoma suggesting the presence of a tumor suppressor gene located on this chromosome. In previous work, we showed that CDKN2A and CDKN2B genes, mapped at 9p21, were not deleted in neuroblastoma cells. In the present article, we refine the deleted region of 9p using polymerase chain reaction-based analysis of highly polymorphic simple sequence repeats and a two color fluorescence in situ hybridization technique on interphase nuclei. We analyzed 71 primary tumors of patients at the onset of the disease. We found loss of heterozygosity (LOH) in 16 of 71 (23%) cases; the frequency of LOH for 9p was higher (28%) in favorable stages 1, 2, and 4s than in unfavorable stages 3 and 4 (14%). Our results identify two regions of frequent allelic loss: the first at the locus D9S1849 and the second at the locus D9S157. These regions appear to be distant from CDKN2A and CDKN2B loci suggesting that other genes may be involved in 9p deletion. Finally, our data show that 9p deletion is more frequent in tumors of patients with a favorable prognosis, indicating that deleted genes may not be crucial for tumor progression." @default.
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- W2026966628 date "2002-05-01" @default.
- W2026966628 modified "2023-10-17" @default.
- W2026966628 title "Two regions of deletion in 9p22∼p24 in neuroblastoma are frequently observed in favorable tumors" @default.
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- W2026966628 doi "https://doi.org/10.1016/s0165-4608(01)00640-9" @default.
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