NQO1 and breast carcinoma: Furthermore, the authors showed that the status of Nrf2 immunohistochemistry in women with mammary carcinoma correlated positively with histological grade, Ki-67 labeling index, p62 immunoreactivity, nicotinamide adenine dinucleotide cofactor NAD(P)H immunoreactivity, and quinone oxidoreductase 1 (NQO1).