Deletion and transfection analysis of the P15/MTS2 gene in malignant gliomas

Mirna Tenan, Sara Benedetti, Gaetano Finocchiaro

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We have investigated the status of the MTS2 gene, encoding the cyclin-dependent kinase (CDK) inhibitor p15, in 32 glioblastomas. Semi-quantitative PCR identified 7 tumors in which the amplified material was 18.6% of controls and 7 in which was 48.0%, suggesting the occurrence of homozygous and hemizygous deletions, respectively. Single strand conformation polymorphism analysis identified one polymorphism but no mutations. We also expressed MTS2 and MTS1, encoding the contiguous and highly homologous CDK inhibitor p16, in U-87 human glioblastoma cells. Both genes, either separately or in combination, inhibit significantly the proliferation rate of U-87 cells but such inhibition is progressively lost. As a whole, the data assign a tumor suppressor role to p15 and confirm homozygous deletions as the favorite mechanism for the inactivation of MTS1 and MTS2 in glioblastomas.

Original languageEnglish
Pages (from-to)195-202
Number of pages8
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Molecular Biology


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