GBA	Gut–Brain Axis
3D	Three-dimensional
PDMS	polydimethylsiloxane
PEVA	poly (ethylene/vinyl acetate)
IEB	Intestinal epithelial barrier
BBB	Blood–Brain Barrier
LPS	lipopolysaccharide
CNS	Central nervous system
OOC	Organ-on-a-chip
HBVP	Human brain vascular pericytes
VdECM	Vascular decellularized extracellular matrix
TJs	Tight junctions
ABC	ATP-binding cassette
AJs	Adherens junctions
BCRP	Breast cancer resistance protein
HUVECs	Human umbilical vein endothelial cells
DMEM	Dulbecco’s Modified Eagle’s Medium
HCMECs	Human brain microvascular endothelial cells