2.6. Drugs
The drugs used were formalin (Nuclear, S˜ao Paulo, Brazil),
acetic acid (Cin´etica Qu´ımica, S˜ao Paulo, Brazil), AAS,
indomethacin and PBS (Sigma Chemical Co., St. Louis, MO,
USA). All drugs and fractions were dissolved in PBS, except
indomethacin, which was dissolved in PBS containing 5% of
sodium bicarbonate.