PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15289892-0 2004 A combination of selective COX-2 inhibitors and hydrogen peroxide increase the reactive oxygen species formation in osteosarcoma cells after X-ray irradiation. Reactive Oxygen Species 79-102 mitochondrially encoded cytochrome c oxidase II Homo sapiens 27-32 15289892-3 2004 A low dose concentration of COX-2 inhibitor in combination with hydrogen peroxide and irradiation did affect ROS formation in the intracellular compartment; however, this same combination of agents at high doses did not modulate the effect of irradiation. Reactive Oxygen Species 109-112 mitochondrially encoded cytochrome c oxidase II Homo sapiens 28-33