Study of TLR3, TLR4 and TLR9 in breast carcinomas and their association with metastasis.

Abstract:

BACKGROUND:Toll-like receptors (TLRs) have garnered an extraordinary amount of interest in cancer research due to their role in tumor progression. By activating the production of several biological factors, TLRs induce type I interferons and other cytokines, which drive an inflammatory response and activate the adaptive immune system. The aim of this study was to investigate the expression and clinical relevance of TLR3, 4 and 9 in breast cancer. METHODS:The expression levels of TLR3, TLR4 and TLR9 were analyzed on tumors from 74 patients with breast cancer. The analysis was performed by immunohistochemistry. RESULTS:Samples of carcinomas with recurrence exhibited a significant increase in the mRNA levels of TLR3, TLR4 and TLR9. Tumors showed high expression of TLRs expression levels by cancer cells, especially TLR4 and 9. Nevertheless, a significant percentage of tumors also showed TLR4 expression by mononuclear inflammatory cells (21.6%) and TLR9 expression by fibroblast-like cells (57.5%). Tumors with high TLR3 expression by tumor cell or with high TLR4 expression by mononuclear inflammatory cells were significantly associated with higher probability of metastasis. However, tumours with high TLR9 expression by fibroblast-like cells were associated with low probability of metastasis. CONCLUSIONS:The expression levels of TLR3, TLR4 and TLR9 have clinical interest as indicators of tumor aggressiveness in breast cancer. TLRs may represent therapeutic targets in breast cancer.

journal_name

BMC Cancer

journal_title

BMC cancer

authors

González-Reyes S,Marín L,González L,González LO,del Casar JM,Lamelas ML,González-Quintana JM,Vizoso FJ

doi

10.1186/1471-2407-10-665

subject

Has Abstract

pub_date

2010-12-03 00:00:00

pages

665

issn

1471-2407

pii

1471-2407-10-665

journal_volume

10

pub_type

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