GFAP expression levels in WKYRs and SHRs 24 h after injection of LPS. Comparison of GFAP expression levels in the striatum of WKYRs and SHRs after injection of 2, 4 and 40 μg LPS in the striatum (n = 3 for the sham WKY rats and n = 4 to 5 for the Et-1-treated WKY rats and n = 4 for the sham SHRs and n = 4 for the Et-1 treated SHRs). * Significant difference between WKY and SHR. $ Significant difference between sham and Et-1 treated animals. ns: no significant difference between WKY rats and SHRs.