highly significantP < 0.01
An analysis of covariance revealed a highly significant relationship between macroautophagy suppression by amino acid supplementation and reduction in Aβ levels (Aβ40, P < 0.01; Aβ42, P < 0.001) and between macroautophagy induction by Leu/His deprivation and increased Aβ production (Aβ40, P < 0.01; Aβ42, P < 0.0001).