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- Title
Somatic deletion mapping on chromosome 10 and sequence analysis of PTEN/MMAC1 point to the 10q25-26 region as the primary target in low-grade and high-grade gliomas.
- Authors
Maier, Daniel; Zhang, Zuwen; Taylor, Elisabeth; Hamou, Marie-France; Gratzl, Otmar; Meir, Erwin G Van; Scott, Rodney J; Merlo, Adrian
- Abstract
The 10q25-26 region between the dinucleotide markers D10S587 and D10S216 is deleted in glioblastomas and, as we have recently shown, in low-grade oligodendrogliomas. We further refined somatic mapping on 10q23-tel and simultaneously assessed the role of the candidate tumor suppressor gene PTEN/MMAC1 in glial neoplasms by sequence analysis of eight low-grade and 24 high-grade gliomas. These tumors were selected for partial or complete loss of chromosome 10 based on deletion mapping with increased microsatellite marker density at 10q23-tel. Three out of eight (38%) low-grade and 3/24 (13%) high-grade gliomas exclusively target 10q25-26. We did not find a tumor only targeting 10q23.3, and most tumors (23/32, 72%) showed large deletions on 10q including both regions. The sequence analysis of PTEN/MMAC1 revealed nucleotide alterations in 1/8 (12.5%) low-grade gliomas in a tumor with LOH at 10q21-qtel and in 5/21 (24%) high-grade gliomas displaying LOH that always included 10q23-26. Our refined mapping data point to the 10q25-26 region as the primary target on 10q, an area that also harbors the DMBT1 candidate tumor suppressor gene. The fact that we find hemizygous deletions at 10q25-qtel in low-grade astrocytomas and oligodendrogliomas – two histologically distinct entities of gliomas – suggests the existence of a putative suppressor gene involved early in glial tumorigenesis.
- Subjects
CHROMOSOMES; TUMORS; NUCLEOTIDE sequence; GENE mapping
- Publication
Oncogene, 1998, Vol 16, Issue 25, p3331
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/sj.onc.1201832