Intestinal catalase activity in LPA transgenic and non-transgenic mice. The histograms represent means with SD indicated. Population means that were significantly different from the non-transgenic mice (p < 0.05) are denoted with *. Population means denoted with • indicate difference from the corresponding mice fed the HFHC diet and ⊗ indicate significant differences from the corresponding aminoguanidine (AG) treated mice. Experimental details are given in the legend to Fig. 1 and in Materials and Methods section.