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

D-K Kim1, J H Lee1, O J Lee1

  • 1Nano-Bio Regenerative Medical Institute, Hallym University,Chuncheon,South Korea.

The Journal of Laryngology and Otology
|February 20, 2015
PubMed
Abstract

Insights

The Cip/Kip family of cyclin-dependent kinase inhibitors may play a role in early glottic cancer development. Reduced expression and genetic alterations in p21, p27, and p57 were observed, suggesting their involvement in carcinogenesis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Genetic alterations in cyclin-dependent kinase inhibitors are linked to cancer development.
  • The Cip/Kip family, including p21CIP1/WAF1, p27KIP1, and p57KIP2, are key regulators of cell cycle progression.

Purpose of the Study:

  • To investigate the expression and mutational status of Cip/Kip family members in early glottic cancer.
  • To explore the potential role of these inhibitors as molecular mechanisms in glottic carcinogenesis.

Main Methods:

  • Quantitative reverse transcription polymerase chain reaction and densitometry for gene expression analysis.
  • Single-strand conformational polymorphism polymerase chain reaction for p21 inactivation and p53 mutation detection.
  • DNA methylation analysis to investigate p27 and p57 inactivation mechanisms.

Main Results:

  • Reduced expression of p27KIP1 and p57KIP2 was observed in all samples.
  • Incomplete down-regulation of p21CIP1/WAF1 expression occurred in 6 of 11 samples.
  • p53 mutation at exon 6 and methylation of p27KIP1 and p57KIP2 were detected.

Conclusions:

  • The Cip/Kip family of cyclin-dependent kinase inhibitors may function as a molecular mechanism in the development of early glottic cancer.
  • Alterations in p21, p27, and p57 expression and genetics are implicated in glottic carcinogenesis.
Keywords:
Carcinogenesis

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