Fig 8. P450 O-dealkylation enzymatic activity in NPC1+/+, NPC1+/-, and NPC1-/- cats.
(A-D) Activity of CYP450 catalysed reactions in feline model of NPC1, shown as percent of age-matched controls. Age-matched NPC1+/+ (white), NPC1+/- (grey) and NPC1-/- (black) cats were included in addition to HPBCD treated NPC1-/- cats (striped). (E) CYP3A relative protein quantitation from western blot analysis was significantly lower in NPC1+/-, and NPC1-/- compared to age-matched NPC1+/+ cats when analysed by densitometry. (F) Representative western blot analysis of CYP3A in the feline model of NPC1. Age-matched NPC1+/+, NPC1+/- and NPC1-/- cats were included in addition to HPBCD treated NPC1-/- cats. Methoxyresorufin-O-dealkylation (MROD); ethoxyresorufin-O-dealkylation (EROD); pentoxyresorufin-O-dealkylation (PROD); benzoxyresorufin-O-dealkylation (BROD). Data are presented as mean ± SEM, n = 3. Note due to small sample numbers all 3 ages (21, 38, and 59 weeks) HPBCD treated animals were combined for this figure. * p—value <0.05, ** p—value < 0.01, *** p—value < 0.001 calculated using one-way ANOVA test with Tukey’s post-hoc test.