Expression of tissue factor signaling pathway elements correlates with the production of vascular endothelial growth factor and interleukin-8 in human astrocytoma patients

  • Authors:
    • Tatiana C. Carneiro-Lobo
    • Marina T. Lima
    • Andréa Mariano‑Oliveira
    • Angélica Dutra‑Oliveira
    • Sueli M. Oba-Shinjo
    • Suely K.N. Marie
    • Mari C. Sogayar
    • Robson Q. Monteiro
  • View Affiliations

  • Published online on: November 28, 2013     https://doi.org/10.3892/or.2013.2880
  • Pages: 679-686
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

The expression levels of tissue factor (TF), the clotting initiator protein, have been correlated with angiogenesis and the histological grade of malignancy in glioma patients. The pro-tumor function of TF is linked to a family of G protein-coupled receptors known as protease-activated receptors (PARs), which may be activated by blood coagulation proteases. Activation of PARs elicits a number of responses, including the expression of vascular endothelial growth factor (VEGF) and interleukin-8 (IL-8). In the present study, we analyzed the expression of TF signaling pathway elements (TF, PAR1 and PAR2) and evaluated their correlation with the expression of downstream products (VEGF and IL-8) in human astrocytoma patients. Quantitative PCR (qPCR) showed a significant increase in TF expression in grade IV (glioblastoma) tumors, which was inversely correlated with the expression of the tumor-suppressor PTEN. Immunohistochemistry and qPCR analyses demonstrated a highly significant elevation in the expression of PAR1, but not PAR2, in tumor samples from high-grade astrocytoma patients. The elevated VEGF expression levels detected in the high-grade astrocytoma samples were positively correlated with TF, PAR1 and PAR2 expression. In addition, IL-8 was significantly increased in glioblastoma patients and positively correlated with TF and PAR2 expression. Further in vitro assays employing the human glioma cell lines U87-MG and HOG demonstrated that a synthetic peptide PAR2 agonist stimulated VEGF and IL-8 production. Our findings suggest a role for TF signaling pathway elements in astrocytoma progression, particularly in glioblastoma. Therefore, TF/PAR signaling elements may be suitable targets for the development of new therapies for the treatment of aggressive glioma.
View Figures
View References

Related Articles

Journal Cover

2014-February
Volume 31 Issue 2

Print ISSN: 1021-335X
Online ISSN:1791-2431

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Carneiro-Lobo TC, Lima MT, Mariano‑Oliveira A, Dutra‑Oliveira A, Oba-Shinjo SM, Marie SK, Sogayar MC and Monteiro RQ: Expression of tissue factor signaling pathway elements correlates with the production of vascular endothelial growth factor and interleukin-8 in human astrocytoma patients. Oncol Rep 31: 679-686, 2014
APA
Carneiro-Lobo, T.C., Lima, M.T., Mariano‑Oliveira, A., Dutra‑Oliveira, A., Oba-Shinjo, S.M., Marie, S.K. ... Monteiro, R.Q. (2014). Expression of tissue factor signaling pathway elements correlates with the production of vascular endothelial growth factor and interleukin-8 in human astrocytoma patients. Oncology Reports, 31, 679-686. https://doi.org/10.3892/or.2013.2880
MLA
Carneiro-Lobo, T. C., Lima, M. T., Mariano‑Oliveira, A., Dutra‑Oliveira, A., Oba-Shinjo, S. M., Marie, S. K., Sogayar, M. C., Monteiro, R. Q."Expression of tissue factor signaling pathway elements correlates with the production of vascular endothelial growth factor and interleukin-8 in human astrocytoma patients". Oncology Reports 31.2 (2014): 679-686.
Chicago
Carneiro-Lobo, T. C., Lima, M. T., Mariano‑Oliveira, A., Dutra‑Oliveira, A., Oba-Shinjo, S. M., Marie, S. K., Sogayar, M. C., Monteiro, R. Q."Expression of tissue factor signaling pathway elements correlates with the production of vascular endothelial growth factor and interleukin-8 in human astrocytoma patients". Oncology Reports 31, no. 2 (2014): 679-686. https://doi.org/10.3892/or.2013.2880