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[Untitled]

Authors :
V.K. de Sá
L. Carvalho
A. Gomes
A. Alarcão
M.R. Silva
P. Couceiro
V. Sousa
F.A. Soares
V.L. Capelozzi
Source :
Brazilian Journal of Medical and Biological Research, Vol 46, Iss 1, Pp 21-31 (2013)
Publication Year :
2013
Publisher :
Associação Brasileira de Divulgação Científica, 2013.

Abstract

Among the most common features of highly invasive tumors, such as lung adenocarcinomas (AD) and squamous cell carcinomas (SqCC), is the massive degradation of the extracellular matrix. The remarkable qualitative and quantitative modifications of hyaluronidases (HAases), hyaluronan synthases (HAS), E-cadherin adhesion molecules, and the transforming growth factor β (TGF-β) may favor invasion, cellular motility, and proliferation. We examined HAase proteins (Hyal), HAS, E-cadherin, and TGF-β profiles in lung AD subtypes and SqCC obtained from smokers and non-smokers. Fifty-six patients, median age 64 years, who underwent lobectomy for AD (N = 31) and SqCC (N = 25) were included in the study. HAS-1, -2 and -3, and Hyal-1 and -3 were significantly more expressed by tumor cells than normal and stroma cells (P < 0.01). When stratified according to histologic types, HAS-3 and Hyal-1 immunoreactivity was significantly increased in tumor cells of AD (P = 0.01) and stroma of SqCC (P = 0.002), respectively. Tobacco history in patients with AD was significantly associated with increased HAS-3 immunoreactivity in tumor cells (P < 0.01). Stroma cells of SqCC from non-smokers presented a significant association with HAS-3 (P < 0.01). Hyal, HAS, E-cadherin, and TGF-β modulate a different tumor-induced invasive pathway in lung AD subgroups and SqCC. HAases in resected AD and SqCC were strongly related to the prognosis. Therefore, our findings suggest that strategies aimed at preventing high HAS-3 and Hyal-1 synthesis, or local responses to low TGF-β and E-cadherin, may have a greater impact in lung cancer prognosis.

Details

Language :
English
ISSN :
0100879X and 1414431X
Volume :
46
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Brazilian Journal of Medical and Biological Research
Publication Type :
Academic Journal
Accession number :
edsdoj.f518b08f6aaf44c6b533c3bde1e3c2d3
Document Type :
article