title: Analysis of cyclin dependent kinase inhibitors in malignant astrocytomas.
abstract: The cyclin-dependent kinase inhibitors p16, p21, and p27 in human brain, and brain tumors were examined to explore clinicopathologic correlations. Western analysis and immunohistochemistry was performed and correlated retrospectively with the patients clinical characteristics. A trend was found between increased progression-free survival and p27 expression. There was no correlation between p27 expression and age or gender. The expression of p27 in malignant gliomas may have prognostic value. In addition, an investigation of the therapeutic benefit of overexpression of this cyclin-dependent kinase inhibitor is warranted given reports of diminished malignant potential of tumors expressing p27.
authors.affiliation: Barrow Neurologic Institute, Phoenix, AZ 85013, USA.
authors.forename: C H
authors.initials: CH
authors.lastname: Alleyne
authors.forename: J
authors.initials: J
authors.lastname: He
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: S B
authors.initials: SB
authors.lastname: Hunter
authors.forename: G
authors.initials: G
authors.lastname: Cotsonis
authors.forename: C D
authors.initials: CD
authors.lastname: James
authors.forename: J J
authors.initials: JJ
authors.lastname: Olson
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001254:Astrocytoma / Q000201:enzymology* / Q000473:pathology; D001345:Autoradiography; D015153:Blotting, Western; D001932:Brain Neoplasms / Q000201:enzymology* / Q000473:pathology; D018797:Cell Cycle Proteins; D002648:Child; D002675:Child, Preschool; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000096:biosynthesis; D050759:Cyclin-Dependent Kinase Inhibitor p21; D050760:Cyclin-Dependent Kinase Inhibitor p27; D018844:Cyclin-Dependent Kinases / Q000037:antagonists & inhibitors*; D016213:Cyclins / Q000096:biosynthesis; D005260:Female; D005909:Glioblastoma / Q000201:enzymology / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008869:Microtubule-Associated Proteins / Q000096:biosynthesis; D008875:Middle Aged; D012189:Retrospective Studies; D025521:Tumor Suppressor Proteins
chemical_list: C493956:CDKN1A protein, human; D018797:Cell Cycle Proteins; D019941:Cyclin-Dependent Kinase Inhibitor p16; D050759:Cyclin-Dependent Kinase Inhibitor p21; D016213:Cyclins; D008869:Microtubule-Associated Proteins; D025521:Tumor Suppressor Proteins; D050760:Cyclin-Dependent Kinase Inhibitor p27; D018844:Cyclin-Dependent Kinases