TRPV1 and Wilson disease: SA treatment had no significant effects on body weight of either WT or TRPV1−/− mice (WT-WD, 47.1 ± 3.4 g; WT-WD-SA, 41.6 ± 3.2 g; TRPV1−/−-WD, 46.2 ± 3.7 g; TRPV1−/−-WD-SA, 46.0 ± 2.9 g).