Immunohistological evaluation of Ki-67, p63, CK19 and p53 expression in oral epithelial dysplasias.
BACKGROUND
Oral squamous cell carcinoma develops through a multistep of genetic mutations, and the process can be morphologically recognized as oral epithelial dysplasia. To evaluate the hypothesis that distributional alterations of proliferating and stem cells may be a useful index to estimate the grading and development of epithelial dysplasia, we examined the distribution patterns according to stratified cell layers.


METHODS
Sixty-two oral dysplasia cases according to the histological grades were immunohistologically examined and the nuclear expression of Ki-67 and p63 antigens was counted according to epithelial layers as labeling index.


RESULTS
The Ki-67 labeling index in the basal and suprabasal layers and that of p63 in the basal layer showed a significant difference between low- and high-grade groups of epithelial dysplasia.


CONCLUSIONS
The architectural alteration of proliferating cell and stem cell distribution in the layers of epithelial dysplasias may provide useful information to evaluate the grading of oral epithelial dysplasias.
Takeda
T
T
Department of Maxillofacial Diagnostic and Surgical Sciences, Field of Oral and Maxillofacial Rehabilitation, Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka 8-35-1, Kagoshima 890-8544, Japan.
Sugihara
K
K
Hirayama
Y
Y
Hirano
M
M
Tanuma
J-I
JI
Semba
I
I
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D049109:Cell Proliferation; D004848:Epithelium / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000096:biosynthesis; D019394:Ki-67 Antigen / Q000096:biosynthesis; D008297:Male; D008565:Membrane Proteins / Q000096:biosynthesis; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000378:metabolism* / Q000473:pathology; D009363:Neoplasm Proteins / Q000032:analysis / Q000096:biosynthesis*; D014411:Neoplastic Stem Cells / Q000378:metabolism*; D011230:Precancerous Conditions / Q000378:metabolism* / Q000473:pathology; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis
C081876:CKAP4 protein, human; D019394:Ki-67 Antigen; D008565:Membrane Proteins; D009363:Neoplasm Proteins; D016159:Tumor Suppressor Protein p53; D007633:Keratins