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. 2018 Feb;6(3):39. doi: 10.21037/atm.2017.03.83

Table 1. Selected IBD candidate genes associated with epithelial barrier dysfunction.

Gene symbol Gene/protein name Key functions of the protein in the gut Reference
HNF4α Hepatocyte nuclear factor 4α Regulation of the expression of intestinal cells genes including apolipoprotein A-I, A-IV, B, guanylyl cyclase C, CYP3A4, intestinal alkaline phosphatase, and meprin 1α (30,31)
CDH1 E-cadherin Maintaining the cell adhesion between intestinal epithelial cells; being component of adherens junctions (31,32)
MEP1A Meprin 1A Cleaving laminin, TJ proteins and cytokines within brush-border membrane (33)
NOD2/CARD15 Nucleotide-binding oligomerization domain containing 2/caspase recruitment domain family, member 15 Epithelial cells innate immunity activation (34)
ATG16L1 Autophagy-related protein 16-1 Mediating NOD-2 directed autophagy (35,36)
Xbp1 X-box-binding protein 1 Transcription factor; mediator of Paneth cell impairment and endoplasmic reticulum stress (37)
STAT3 Signal transducer and activator of transcription 3 Survival and proliferation of intestinal epithelial cells while injured; mediating cytokine signaling (38)
CLDN* Claudin family (namely, claudins 1–5, 8, 15) TJ structure component; barrier and ion and water channels forming (39)
GATM Glycine amidinotransferase Endogenous creatine synthesis (40)
MUC3A Mucin 3A Mucin in inner mucus layer (41)
MUC19 Mucin 19 Mucin secretion in outer mucus layer (42)