CXCR-4	C-X-C chemokine receptor type 4
CCR7	C-C chemokine receptor type 7
CXCL12/SDF-1α	stromal cell-derived factor 1
CCL21/6Ckine	C-C chemokine ligand 21
BBB	blood–brain barrier
SSP	serine synthesis pathway
BEF	brain extracellular fluid
SGOC	serine and glycine one carbon metabolism
PHGDH	phosphoglycerate dehydrogenase
GlyR	strychnine-sensitive glycine receptor
GlyT1	glycine transporter 1
GlyT2	glycine transporter 2
NMDR	N-methyl-D-aspartate receptors
GABA	gamma-aminobutyric acid
SHMT2	serine hydroxymethyltransferase 2
MTHFD2	methylenetetrahydrofolate dehydrogenase 2
MTHFD1L	methylenetetrahydrofolate dehydrogenase 1L
PSAT	phosphoserine aminotransferase
PSP	phosphoserine phosphatase
GSH	glutathione
ROS	reactive oxygen species
PDAC	pancreatic ductal adenocarcinoma
mGluRs	metabotropic glutamate receptors
SLC1A4	solute carrier 1A4
SLC1A5	solute carrier 1A5
EAAT	excitatory amino acid transporter
SNAT3	sodium neutral amino acid transporter 3
THF	tetrahydrofolate
SHMT1	serine hydroxymethyltransferase 1
NADPH	nicotinamide adenine dinucleotide phosphate
TCA	tricarboxylic acid cycle