Abstract 2280: Role of apoptosis signal-regulating kinase 1 in the cell apoptosis in oral leukoplakia

Abstract

Abstract Oral leukoplakia is a common precancerous lesion. The mechanism is not clear. The aim is to investigate the roles of apoptosis signal-regulating kinase 1(ASK1) in the cell apoptosis in oral leukoplakia. Archival tissue sections of 10 oral leukoplakia,23 oral leukoplakia with mild to moderate dysplasia, 7 normal oral mucosa were detected by real time PCR and immunohistochemical staining of markers of ASK1 and p-ASK1.The cell apoptosis was detected by terminal deoxynucleotidyl transferase-mediated nucleotide shift enzyme(TdT) mediated d-UTP end labeling(TUNEL). The results showed The mRNA and protein expression of ASK1 in oral leukoplakia with mild to moderate dysplasia was higher than the normal mucosa(p<0.05).From oral normal mucosa to oral leukoplakia to mild to moderate dysplasia, the expression of p-ASK1 was increased with the increasing grade( p<0.05).The apoptosis in oral leukoplakia and mild to moderate dysplasia increased more than normal mucose(p<0.05). It suggests that ASK1 and p-ASK1 are positive correlation with the increased apoptosis in the development of oral leukoplakia, its related signal pathways and cascade may play an important role in the cell apoptosis in oral leukoplakia. Citation Format: Xiaofei Tang, Jian-Fei Zhang, Wen-wen Niu, Min Zhang. Role of apoptosis signal-regulating kinase 1 in the cell apoptosis in oral leukoplakia. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 2280. doi:10.1158/1538-7445.AM2014-2280