Environmental ozone (O3) exposure has adverse effects on different body systems. This experimental work aimed to study the effect(s) of O3 exposure on the olfactory bulbs (OB) of Swiss Webster and C57BL/6J mouse strains, using Western blot technique. Both mice strains were exposed to different O3 doses for different number of exposures and durations. The results indicated that O3 exposure caused a significant increase in the level of the proteins involved in the oxidative stress state such as 4-hydroxynonenal (4HNE) and Cytochrome P450, family 1, subfamily A, polypeptide 1 (CYP1A1), in addition to the total OB proteins in Swiss Webster mouse strain. However, this effect was not observed in C57BL/6J mouse strain. Furthermore, CYP1A1 was completely absent in the Green fluorescent protein (GFP) C57BL/6J O3 exposed mice. Moreover, O3 exposure caused a significant decrease in the body weight of the tested mice from the two strains.
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