Abstract:
:Loss of heterozygosity (LOH) on 10q is associated with late-stage events in urothelial neoplastic progression. The tumor suppressor gene PTEN, which is mutated or homozygously deleted in numerous cancers, maps to a region of 10q within the reported region of minimal loss in bladder tumors. In two recent studies alterations in the PTEN gene occur at a low frequency in bladder tumors displaying 10q LOH. We have screened 35 late-stage bladder tumors for mutations in PTEN and MXI1, both genes mapping to chromosome 10q. Using single-strand conformation polymorphism analysis, we identified 6 tumors harboring mutations in PTEN and 2 additional tumors displaying homozygous deletion at this locus. No MXI1 mutations were identified within the same tumor panel. Of 16 bladder tumor cell lines analyzed, 2 showed homozygous deletion of PTEN and 3 harbored point mutations resulting in an amino acid change. Two cell lines harbored missense mutations in MXI1. We report a significantly higher frequency of PTEN alterations in bladder carcinoma (23%) than was previously recorded, with no accompanying mutations in the MXI1 gene.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Wang DS,Rieger-Christ K,Latini JM,Moinzadeh A,Stoffel J,Pezza JA,Saini K,Libertino JA,Summerhayes ICdoi
10.1002/1097-0215(20001115)88:4<620::aid-ijc16>3.0keywords:
subject
Has Abstractpub_date
2000-11-15 00:00:00pages
620-5issue
4eissn
0020-7136issn
1097-0215pii
10.1002/1097-0215(20001115)88:4<620::AID-IJC16>3.0journal_volume
88pub_type
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