Expression and mutational analysis of Cip/Kip family in early glottic cancer.

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Expression and mutational analysis of Cip/Kip family in early glottic cancer.

J Laryngol Otol. 2015 Feb;129(2):168-73

Authors: Kim DK, Lee JH, Lee OJ, Park CH

Abstract
BACKGROUND: Genetic alteration of cyclin-dependent kinase inhibitors has been associated with carcinogenesis mechanisms in various organs.
OBJECTIVE: This study aimed to evaluate the expression and mutational analysis of Cip/Kip family cyclin-dependent kinase inhibitors (p21CIP1/WAF1, p27KIP1 and p57KIP2) in early glottic cancer.
METHODS: Expressions of Cip/Kip family and p53 were determined by quantitative reverse transcription polymerase chain reaction and densitometry. For the analysis of p21 inactivation, sequence alteration was assessed using single-strand conformational polymorphism polymerase chain reaction. Additionally, the inactivation mechanism of p27 and p57 were investigated using DNA methylation analysis.
RESULTS: Reduced expression of p27 and p57 were detected in all samples, whereas the expression of p21 was incompletely down-regulated in 6 of 11 samples. Additionally, single-strand conformational polymorphism polymerase chain reaction analysis showed the p53 mutation at exon 6. Methylation of p27 and p57 was detected by DNA methylation assay.
CONCLUSION: Our results suggest that the Cip/Kip family may have a role as a molecular mechanism of carcinogenesis in early glottic cancer.

PMID: 25695279 [PubMed - indexed for MEDLINE]

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