Apoptosis, proliferation and p12doc-1 profiles in normal, dysplastic and malignant squamous epithelium of the Syrian hamster cheek pouch model

被引:39
作者
Kohno, Y
Patel, V
Kim, Y
Tsuji, T
Chin, BR
Sun, M
Donoff, RB
Kent, R
Wong, D
Todd, R
机构
[1] Harvard Univ, Sch Dent Med, Dept Oral Med & Diagnost Sci, Div Oral Pathol, Boston, MA 02115 USA
[2] Massachusetts Gen Hosp, Dept Oral & Maxillofacial Surg, Boston, MA 02114 USA
[3] Forsyth Inst, Boston, MA 02115 USA
关键词
apoptosis; proliferation; doc-1; oral cancer; Syrian hamster cheek pouch carcinoma model;
D O I
10.1016/S1368-8375(01)00055-0
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Disruption of the homeostatic balance between proliferation and apoptosis is widely believed to contribute to human oral carcinogenesis. Using the Syrian hamster oral cancer model, we examined normal, hyperplastic, dysplastic and malignant oral epithelium for the fraction of apoptotic, proliferating and p12(doc-1) expressing keratinocytes using the TUNEL assay, as well as PCNA and p12(doc-1) immunostaining, respectively. The percentage of TUNEL positive cells progressively increased from normal to dysplastic epithelium (P < 0.0019), but returned to normal keratinocyte levels in the malignant epithelium (P < 0.0012). The overall ratio of apoptotic to proliferating keratinocytes remains similar until the transition between dysplastic and malignant epithelium, where the ratio is markedly reduced (P < 0.05), p12(doc-1) labeling demonstrated a similar expression pattern (P < 0.008). This study demonstrates that apoptosis, proliferation and the expression of p12(doc-1) reflects alterations reported during human oral carcinogenesis and supports the use of the Syrian hamster model for the further examination of these pathways. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:274 / 280
页数:7
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