In conclusion, the present study suggests that FM
added at 124 g/kg of the diet does not induce significant
changes in mRNA abundance and activity of antioxidant
enzymes of dairy cows that are infused in the abomasum
with 250 g FO/d or not. The only exceptions were the
significant increases in erythrocyte GPX activity and GPX1
gene expression in mammary tissue, although the latter
was observed only in the absence of abomasal infusion of
FO. Abomasal infusion of 250 g FO/d did not induce
changes in activity and gene expression of antioxidant
enzymes and gene expression of lipogenic-genes in mammary tissue, except for a significant increase in the
expression of GPX1 in the absence of dietary FM.