Figure 2. The myeloperoxidase activities of the lungs and small intestines of the rabbits instilled with acid or phosphate-buffered saline. The myeloperoxidase activity increased significantly in the lungs of the animals in which acid was instilled compared with the animals that served as controls, which received phosphate-buffered saline. Both pretreatments blocked this increase. *Significantly different from the animals that received phosphate-buffered saline instillations, pentoxifylline pretreatment, and anti-tumor necrosis factor [Greek small letter alpha] pretreatment (P < 0.05 or less).