Epigenetic changes of tumor suppressor genes, P15, P16, VHL and P53 in oral cancer.
We performed methylation specific PCR to explore the mechanism of inactivation of tumor suppressor genes P15, P16, P53 and VHL in 48 oral SCC. The frequencies of aberrant methylation on the promoter of the P15, the P16, the P53 and the VHL genes were 0.27 (13/48), 0.42 (20/48), 0.04 (2/48) and none, respectively. Altogether, over 50% of the samples showed the CpG-island methylation modification in at least one of the three tumor suppressor genes, indicating that the frequent inactivation of these genes may be an important step during oral cancer development, and the methylation inactivation of P15 or P16 may occur at pre-cancerous stage.
Yeh
Kun-Tu
KT
Department of Molecular Medicine and Laboratory Medicine, China Medical College Hospital, 2 Yuh-Der Road, Taichung, Taiwan, R.O.C.
Chang
Jan-Gowth
JG
Lin
Ting-Hsu
TH
Wang
Yu-Fen
YF
Tien
Ni
N
Chang
Jan-Yi
JY
Chen
Jui-Chang
JC
Shih
Mu-Chin
MC
D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics; D016022:Case-Control Studies; D018797:Cell Cycle Proteins / Q000235:genetics*; D018899:CpG Islands; D050762:Cyclin-Dependent Kinase Inhibitor p15; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000235:genetics*; D019175:DNA Methylation; D017931:DNA Primers / Q000737:chemistry; D017353:Gene Deletion; D015972:Gene Expression Regulation, Neoplastic; D020868:Gene Silencing; D016147:Genes, Tumor Suppressor; D016158:Genes, p53 / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics*; D009154:Mutation / Q000235:genetics; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic; D025521:Tumor Suppressor Proteins / Q000235:genetics*; D044767:Ubiquitin-Protein Ligases / Q000235:genetics*; D051794:Von Hippel-Lindau Tumor Suppressor Protein
C493966:CDKN2B protein, human; D018797:Cell Cycle Proteins; D050762:Cyclin-Dependent Kinase Inhibitor p15; D019941:Cyclin-Dependent Kinase Inhibitor p16; D017931:DNA Primers; D025521:Tumor Suppressor Proteins; D044767:Ubiquitin-Protein Ligases; D051794:Von Hippel-Lindau Tumor Suppressor Protein; C497446:VHL protein, human