1-MT	1-methyltryptophan
3-HAA	3-hydroxyanthranilic acid
3-HAAO	3-hydroxyanthranilic acid dioxygenase
3-HK	3-hydroxykynurenine
AA	anthranilic acid
AAV	ANCA-associated vasculitis
ABMR	antibody-mediated rejection
AdCTLA4Ig	adenovirus-mediated CTLA4Ig
AhR	aryl hydrocarbon receptor
AKI	acute kidney injury
AMPA	alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid
ANCA	antineutrophil cytoplasmic antibody
AR	acute rejection
BKV	polyomavirus BK
CKD	chronic kidney disease
CTLA4	cytotoxic T-lymphocyte-associated protein 4
CTLA4-Ig	CTLA4 fusion protein
CMV	cytomegalovirus
CsA	cyclosporine
CVVH	continuous veno-venous hemofiltration
DC	dendritic cell
dd-cfDNA	donor-derived cell-free DNA
ESKD	end stage kidney disease
GCN2	general control non-derepressible 2
GCS	glucocorticosteroids
GLU	glutamate
GPR35	G protein-coupled receptor 35
HIV	human immunodeficiency virus
HMGB1	high mobility group box protein 1
hsCRP	high-sensitivity C-reactive protein
HTK	histidine-tryptophan-ketoglutarate
IDO	indoleamine-2,3-dioxygenase
IDO1	indoleamine-2,3-dioxygenase 1
IDO2	indoleamine-2,3-dioxygenase 2
IFN-γ	interferon-γ
IL	interleukin
KAT	kynurenine aminotransferase
KMO	kynurenine 3-monooxygenase
KRT	kidney replacement therapy
KYN	kynurenine
KYNA	kynurenic acid
KYNU	kynureninase
LPS	lipopolysaccharide
MHC	mean histocompatibility complex
MMF	mycophenolate mofetil
mTOR	mammalian target of rapamycin
mTORi	mammalian target of rapamycin inhibitor
NAD+	nicotinamide adenine dinucleotide
NAMPT	nicotinamide phosphoribosyltransferase
N-formyl-KYN	N-formyl-kynurenine
NK	natural killer
NMDA	N-methyl-D-aspartate
NO	nitric oxide
PA	picolinic acid
PD-1	programmed cell death protein 1
PD-L1	programmed death-ligand 1
QA	quinolinic acid
QPRT	quinolinic acid phosphoribosyltransferase
RCC	renal cell carcinoma
sTNF-1	soluble TNF-receptor-1
TAC	tacrolimus
TCR	T cell mediated rejection
TDO	tryptophan-2,3-dioxygenase
TGF-β	transforming growth factor-β
Th	T helper cell
TLR	toll like receptor
TNF-α	tumor necrosis factor-α
TPE	therapeutic plasma exchange
Treg	regulatory T cell
Trp	tryptophan
TSG-6	TNF-stimulated gene 6
XA	xanthurenic acid