SOD1 and amnesia: Effects of combined proanthocyanidins extracted from lotus seedpod (LSPC) and Lactobacillus casei-01 (LC) on brain malondialdehyde (MDA) and total antioxidant capacity (TAOC) levels, total superoxide dismutase (T-SOD), glutathione peroxidase (GSH-Px), myeloperoxidase (MPO) and acetylcholinesterase (AchE) activities, ratio of T-SOD to MDA (T-SOD/MDA) and ratio of GSH-Px to T-SOD (GSH-Px/T-SOD) in scopolamine-induced amnesia mice.