Abstract
The cellular infiltration found during CNS inflammation consists of monocytes and activated T cells, suggesting the presence of cell-specific chemotactic signals during inflammatory responses. Astrocyte chemokine expression might contribute to site-specific leukocyte infiltration within the CNS. To investigate the factors that regulate astrocyte chemokine expression, we examined the ability of human fetal astrocytes to induce β-family chemokine mRNA. Astrocyte-derived monocyte chemoattractant protein-1 (MCP-1), RANTES, macrophage inflammatory protein-1α (MIP-1α), and MIP-1β mRNA were easily induced by lipopolysaccharide and/or the proinflammatory cytokines (IFNγ and/or TNF-α), respectively. Addition of both IFNγ and TNF-α together did not lead to an additive effect but resulted in the inhibition of MCP-1 and MIP-1β mRNA expression, indicating that interaction between chemokines and cytokines may play a key role in regulating the local immune response of resident and infiltrating cells at the site of lesion. Interestingly, ultraviolet light-inactivated measles virus, but not cytomegalovirus, strongly induced expression of MCP-1, RANTES, MIP-1α, and MIP-1β mRNA in human embryonic astrocytes, especially MCP-1 and MIP-1β. An association occurs between the β-family chemokine expression in astrocytes and inflammatory factors/virus, suggesting a possible role for β-family chemokines in the pathogenesis of CNS inflammatory disease.
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Xiao, BG., Mousa, A., Kivisäkk, P. et al. Induction of β-family chemokines mRNA in human embryonic astrocytes by inflammatory cytokines. J Neurocytol 27, 575–580 (1998). https://doi.org/10.1023/A:1006918110952
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DOI: https://doi.org/10.1023/A:1006918110952