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  • Title: Absence of p18 mutations or deletions in lymphoid malignancies.
    Author: Otsuki T, Jaffe ES, Wellmann A, Kumar S, Condron KS, Raffeld M.
    Journal: Leukemia; 1996 Feb; 10(2):356-60. PubMed ID: 8637248.
    Abstract:
    p18 is a recently described cyclin-dependent kinase inhibitor (CDK-I) wih homology to p16 and p15. The latter two CDK-Is have been implicated as possible tumor suppressor genes in a wide variety of human tumors, including hematological malignancies. Because of p18's structural and functional homology to p16 and p15, we hypothesized that it may also function as a tumor suppressor gene in some lymphoid malignancies. To explore this possibility we examined 81 primary lymphoid tumors for deletion and mutation p18. The primary tumors included 40 T cell malignancies and 41 B cell malignancies. None of the lymphoid tumors studied possessed deletions of p18, including a group of lymphoblastic lymphomas which we previously reported to have deletions of p16 and p15. PCR-SSCP analysis of the p18 gene identified a single polymorphism of codon 114, but failed to demonstrate mutations in any of the lymphoid tumors. These results do not support a role for p18 in the pathogenesis of the lymphoid neoplasms studied.
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