Catalase Influence in the Regulation of Coronary Resistance by Estrogen: Joint Action of Nitric Oxide and Hydrogen Peroxide

Table 2

Antioxidant activity in cardiac muscle homogenates of the different experimental groups at the end of reperfusion.

	SOD (U mg prot.^−1)	CAT (pmol mg prot.^−1)
TYRODE
SHAM	13.3±2.0	22.4±1.7
OVX	11.7±0.9	26.9±0.7^∗
OVX + E2	11.9±1.2	20.8±2.2^∗∗
L-NAME
SHAM	14.4±1.7	26.6±2.0^∗
OVX	12.0±0.7	27.9±2.6
OVX + E2	12.2±2.8	27.4±3.1^†

Values are expressed as mean ± S.D. of 4–6 animals/group.
*significantly different from TYRODE-SHAM (𝑃<0.05); **significantly different from TYRODE-OVX (𝑃<0.05); ^†significantly different from TYRODE-OVX + E₂ (𝑃<0.05).