Brain Cancer Research Today is a free monthly online journal that collates and summarizes the latest research about Brain Cancer, including details on symptoms, benign and malignant tumors, gliomas, treatment.

Expression of CXC chemokine receptors 1-5 and their ligands in human glioma tissues: role of CXCR4 and SDF1 in glioma cell proliferation and migration.

Bajetto A, Barbieri F, Dorcaratto A, Barbero S, Daga A, Porcile C, Ravetti JL, Zona G, Spaziante R, Corte G, Schettini G, Florio T

Department of Oncology, Biology and Genetics, University of Genova, Viale Benedetto XV, 2, 16132 Genova, Italy. adriana.bajetto@unige.it <adriana.bajetto@unige.it>

Chemokines have been involved in cellular processes associated to malignant transformation such as proliferation, migration and angiogenesis. The expression of five CXC chemokine receptors and their main ligands was analysed by RT-PCR in 31 human astrocytic neoplasms. The mRNAs for all the receptors analysed were identified in a high percentage of tumours, while their ligands showed lower expression. CXCR4 and SDF1 were the most frequently mRNA identified (29/31 and 13/31 of the gliomas studied, respectively). Thus, we further analysed the cell localization of CXCR4 and SDF1 in immunohistochemistry experiments. We show a marked co-localization of CXCR4 and SDF1 in tumour cells, mainly evident in psudolpalisade and microcystic degeneration areas and in the vascular endothelium. In addition, hSDF1alpha induced a significant increase of DNA synthesis in primary human glioblastoma cell cultures and chemotaxis in a glioblastoma cell line. These results provide evidence of the expression of multiple CXC chemokines and their receptors in brain tumours and that in particular CXCR4 and SDF1 sustain proliferation and migration of glioma cells to promote malignant progression.

Published 15 August 2006 in Neurochem Int, 49(5): 423-32.
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