Effects of recombinant osteopontin (OPN) treatment on Evans blue dye extravasation in the brain after subarachnoid hemorrhage (SAH). B 0.1, O 0.02, O 0.1, S, rats treated with bovine serum albumin (0.1μg), OPN (0.02μg), OPN (0.1μg) or saline, respectively; n=6 rats per group; *p<0.0001, #p<0.001, **p<0.005, †p<0.05 vs. sham-operated rats treated with saline or OPN at 24 hours post-surgery; §p<0.025, ¶p<0.05 vs. sham-operated rats treated with saline at 72 hours post-surgery; error bar, SD.