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beta-Catenin, Nf-kappaB and FAS protein expression are independent events in head and neck cancer: study of their association with clinical parameters.

Abstract：

:In spite of much effort, no good markers have yet been found for predicting prognosis or response to therapy in advanced head and neck squamous cell carcinoma (HNSCCs) patients. beta-catenin, a protein involved in the cytoskeleton, cell-cell adhesion and gene transcription, is a factor associated with tumour progression. Recently, an interaction has been reported between beta-catenin, and NF-kappaB coupled with an inverse association of beta-catenin, and FAS (CD95/APO-1) protein expression in breast and colorectal tumours. To confirm these observations and to test their clinical impact in HNSCCs we have evaluated the expression of beta-catenin, NF-kappaB and FAS proteins. We used tissue microarrays to simultaneously analyse the levels of these proteins immunohistochemically in 118 HNSCCs. Among the 113 tumours evaluable for beta-catenin, increased and decreased levels were detected in 41 (36%) and 62 (55%) of the tumours, respectively. beta-catenin, protein staining was mainly membranous but 10 tumours (9%) showed the clear presence of protein in the cytoplasm, and none in the nucleus. Moreover, 81% of the tumours had decreased FAS protein expression, indicating that loss of FAS protein is a common feature of HNSCCs. Abnormal or nuclear NF-kappaB staining was observed in 24% of the tumours. No association was detected between the expression levels of the proteins evaluated. Regarding clinical associations, tumours from the hypopharynx had significantly lower levels of beta-catenin expression than those from other locations (P<0.05). Moreover, our data revealed that patients whose tumours had low levels of beta-catenin protein expression had decreased survival probability (24.8 months vs. NR, P=0.03) and reduced response to therapy (15.4 vs. 43 months; P=0.01) compared with patients whose tumours had high levels of beta-catenin. Taken together, our observations indicate that beta-catenin, NF-kappaB and FAS expression are independent events during HNSCC development and that levels of beta-catenin protein may identify subsets of advanced HNSCCs patients with different prognosis and response to therapy capabilities.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Rodriguez-Pinilla M,Rodriguez-Peralto JL,Hitt R,Sanchez JJ,Sanchez-Verde L,Alameda F,Ballestin C,Sanchez-Cespedes M

doi

10.1016/j.canlet.2004.12.045

keywords:

subject

Has Abstract

pub_date

2005-12-08 00:00:00

pages

141-8

issue

eissn

0304-3835

issn

1872-7980

pii

S0304-3835(05)00008-X

journal_volume

230

pub_type

杂志文章

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beta-Catenin, Nf-kappaB and FAS protein expression are independent events in head and neck cancer: study of their association with clinical parameters.