Abstract
Expression of lymphokine genes in the human astroglial cell lineage was studied. Primers for 9 different human lymphokines, from IL-1α to IL-8, were used to analyze RNA transcripts in 5 cultured human astrocytoma cell lines and fresh brain specimens by PCR. mRNA transcripts for IL-8 were detected in all neuroglial cells. In addition to the cultured cells, we examined IL-8 gene expression within human malignant astrocytoma, peritumoral brain and autopsied normal brains. The result shows that tumor and cells of the surrounding reactive lesion express IL-8 genes, but it is not expressed in normal brains. Next, the concentration of IL-8 in supernatants of cultured cells was measured quantitatively by a solid phase ELISA assay. IL-8 activity was produced constitutively in all astrocytomas and increased markedly upon stimulation with IL-1β or TNF α, in both a time- and dose-dependent fashion. From these results, it is supected that astroglial cell-derived IL-8 may take part in neutrophil-mediated inflammation which accompanies infection, degeneration and malignancy in the brain.
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Nitta, T., Allegretta, M., Okumura, K. et al. Neoplastic and reactive human astrocytes express interleukin-8 gene. Neurosurg. Rev. 15, 203–207 (1992). https://doi.org/10.1007/BF00345934
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DOI: https://doi.org/10.1007/BF00345934