AD	Alzheimer’s disease
TTK	Tetragonia tetragonioides Kuntze
TNF-α	tumor necrosis factor-α
IL	interleukin
APP/PS1	human amyloid precursor protein/presenilin 1
TTK-E	70% ethanol TTK extract
TTK-W	water TTK extract
BDNF	brain-derived neurotrophic factor
CNTF	ciliary neurotrophic factor
CREB	cAMP responding element-binding protein
PKB or Akt	protein kinase B
AD-TTK	0.5% of TTK-E extract
AD-Con	0.5% dextrin in a high-fat diet
NGF	nerve growth factor
En%	energy percent
CT	a cycle of threshold
PcoA	principal coordinate analysis