Angiotensin-converting enzyme 2	ACE-2
α-amylase/trypsin	ATI
Anti-endomysium antibodies IgA	anti-EMA-IgA
Antigen-presenting cell	APC
Anti-tissue transglutaminase IgA antibodies	anti-tTG IgA
Aspartate transaminase/Alanine transaminase	AST/ALT
Autoimmune	AI
Before Common Era	BCE
Casein kinase 1, alpha 1	CSNK1A1
Casein kinase 2, alpha 1	CSNK2A1
Casein kinase 1, epsilon 1	CSNK1E1
Celiac disease	CD
Chemokine (C-C motif) ligand 3	CCL3
Chemokine (C-C motif) ligand 4	CCL4
Chemokine (C-C motif) ligand 20	CCL20
Chemokine (C-C motif) ligand 28	CCL28
Chemokine (C-X-C Motif) Receptor 3	CXCR3
Complement	C
Coronavirus Disease 2019	COVID-19
Creatine phosphokinase	CPK
Crypt base columnar	CBC
C-reactive protein	CRP
C-type lectins	CLEC
CUB domain-containing protein 1	CDCP1
Damage-associated molecular pattern	DAMP
Deamidated gliadin peptide	DGP
Deamidated gliadin peptide antibodies	DGP-AGA
Delta-like canonical Notch ligand 1	DLL1
Delta-like canonical Notch ligand 4	DLL4
Dendritic cell	DC
Epidermal growth factor	EGF
Epidermal growth factor receptor	EGFR
Erythrocyte sedimentation rate	ESR
European Society for Paediatric Gastroenterology Hepatology and Nutrition	ESPGHAN
Food and Drug Administration	FDA
Forkhead box P3—also known as Scurfin	FOXP3
Gastrointestinal	GI
Gluten-free	GF
Gluten-free diet	GFD
Pre-haptoglobin	HP
High-mobility group protein 1	HMGB1
Human leukocyte antigen	HLA
IgA tissue transglutaminase	tTGA
IgA anti-endomysium antibodies	EMA-IgA
IgA anti-intestinal transglutaminase 2 antibodies	TGA-IgA
IgG against deamidate gliadin peptide	DGP-IgG
Immunoglobulin type A	IgA
Immunoglobulin type G	IgG
Immunoglobulin type M	IgM
Inflammatory bowel disease	IBD
Institutional Review Board	IRB
Interferon-γ	IFN-γ
Interleukin	IL-
Intraepithelial CD8+ lymphocytes	IEL
Intravenous immune globulins	IVIG
Junctional adhesion molecules	JAM
Kawasaki disease	KD
Lactate dehydrogenase	LDH or LD
Matrix metalloproteinase-1	MMP-1
Membrane-associated guanylate kinase homologs	MAGUK
Dual specificity mitogen-activated protein kinase kinase 2	MAP2K2
Microbial associated molecular pattern	MAMPs
Middle East Respiratory Syndrome	MERS
Monocyte	Mo
Monocyte chemoattractant protein-1	MCP-1
Multisystem inflammatory syndrome in children	MIS-C
Myeloid differentiation primary response 88	MYD88
Myosin 1C	MYO1C
Natural killer	NK
Neutrophil extracellular traps	NETs
NET activation and release	NETosis
(NOD)-like receptor	NLR
N-terminal prohormone of brain natriuretic peptide	NT-proBNP
Pathogen-associated molecular pattern	PAMP
Pattern recognition receptors	PRRs
Pediatric inflammatory multisystem syndrome	PIMS
Phospholipase C	PLC
Polymorphonuclear leukocyte	PMN
Protease-activated receptor 2	PAR2
Protein kinase C alpha	PKCα
Protein Wnt-3a	WNT3a
Quality of life	QOL
Reactive oxygen species	ROS
Real-time polymerase chain reaction	Real-time PCR or RT-PCR
Receptor Binding Domain	RBD
Regulatory T lymphocytes	Tregs
Ribonucleic acid	RNA
Secretory IgA	SIgA
Severe Acute Respiratory Syndrome	SARS
Severe acute respiratory syndrome coronavirus 2	SARS-CoV-2
Soluble C5b-9	sC5b-9
Systemic inflammatory syndrome in COVID19	SISCoV
Systemic juvenile idiopathic arthritis	sJIA
Temporally associated with SARS-CoV-2 infection	PIMS-TS
T-helper 1 or T helper type 1	Th1
T-helper 2 or T helper type 2	Th2
T-helper 17 or T helper type 17	Th17
Tight junctions	TJs
Tissue transglutaminase or tissue transglutaminase autoantigen	tTG/tTG2
Toll-like receptor 2	TLR2
Toll-like receptor 4	TLR 4
Transforming growth factor alpha	TGF-α
Transglutaminase 2	TG2
Transmembrane serine protease 2	TMPRSS2
Tumor necrosis factor alpha	TNF-α
Type-1 diabetes mellitus	T1DM
Upper limit of normal	ULN
Wnt receptor frizzled 5	FZD5
World Health Organization	WHO
Wnt Family Member 3	WNT3a
Zonula occludens	ZO
Zonula occludens-1	ZO-1
Zonula occludens toxin	Zot
↑	Increased
↓	Decreased