Table 5.

Correlation analyses between antioxidant enzymatic activities and antioxidant enzyme gene expressions and between Nrf2 gene expression and expressions of antioxidant enzyme gene or Keap1 gene in liver and kidney of laying hens.¹

Gene expression	Enzymatic activity		Nrf2 gene expression
	Liver	Kidney	Liver	Kidney
CuZnSOD	0.613∗∗	0.687∗∗	0.756∗∗	0.736∗∗
MnSOD	0.707∗∗	0.026	0.720∗∗	0.099
CAT	0.738∗∗	0.903∗∗	0.893∗∗	0.740∗∗
GR	0.477∗	0.485∗	0.837∗∗	0.915∗∗
GSH-Px	0.450∗	0.767∗∗	0.822∗∗	0.722∗∗
Keap1	–	–	−0.746∗∗	−0.771∗∗

Abbreviations: CAT, catalase; CuZnSOD, copper-zinc superoxide dismutase; GR, glutathione reductase; GSH, glutathione; GSH-Px, glutathione peroxidase; Keap1, Kelch-like ECH-associated protein 1; MnSOD, manganese superoxide dismutase; Nrf2, nuclear factor erythroid 2-related factor 2.

¹Superscript ∗ represents significance at 0.05 level and ∗∗ represents significance at 0.01 level.