Abstract
Chemokines are small proteins that act as chemoattractants and activators in leukocytes during physiological and inflammatory processes. In the CNS chemokine receptors have been shown to be expressed on neurons, astrocytes and microglia but their function in the CNS is poorly understood. CXCR1 and CXCR2 are receptors for ELR-positive CXC chemokines which include growth-regulated oncogene alpha (GRO-alpha) and interleukin-8 (IL-8). GRO-alpha is considered to influence proliferation of cultured oligodendrocyte progenitors (OLPs). Using RT-PCR we show here that the oligodendrocyte precursor cell line CG-4 expresses both CXCR1 and CXCR2. Furthermore we demonstrate that both CG-4 cells and primary cultures of rat OLPs are immunoreactive for CXCR2, the potential receptor for GRO-alpha. This finding demonstrates that the chemokine/chemokine receptor system is probably also involved in the regulation of oligodendroglial cells during developmental processes and may even have implications for inflammatory demyelinating diseases like multiple sclerosis.
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