Reactive oxidant species and oxidation of protein and haemoglobin as biomarkers of susceptibility to stress caused by chloramphenicol.

Chemiluminescence assay was suitable for rapid determination of alterations caused by chloramphenicol (Ch) in blood. The new aspects observed indicated oxidative stress with: (a) biphasic response of reactive oxidant species (ROS) with different concentration of Ch; (b) increase of carbonyl residues and advanced oxidation protein products in blood as a consequence of oxidative stress; (c) oxidation of haemoglobin with rise of oxyhaemoglobin; protein and haemoglobin oxidation was more pronounced in the samples that exhibited high stimuli of ROS; and (d) the ferrous reduction antioxidant potential (FRAP) was the lowest in the maximum ROS-producer sample, which exhibited the lowest consumption of FRAP in response to Ch treatment. The present investigation could contribute to a rapid detection of persons with elevated susceptibility to Ch previously to its application in chemotherapy.