Table 1 Pro-oncogenic effects of cagA-positive H. pylori infection.

From: Molecular anatomy and pathogenic actions of Helicobacter pylori CagA that underpin gastric carcinogenesis

 

Related cancer hallmarks

Pro-oncogenic actions

Molecular mechanisms

CagA dependency

Responsible factors

Reference no.

Cell autonomous pro-oncogenic actions

Sustained proliferative signaling

RAS-ERK signaling activation

Deregulation of SHP2

pY-CagA

EPIpYA-C/EPIpYA-D

90

Wnt signal activation

Complex with E-cadherin

CagA

CM motif

112, 113

Activation of cMet-PI3K-AKT signaling

114

Sequesteration of GSK3β

C-terminal region

115

Degradation of RUNX3

116, 117

Growth suppressors

Degradation of RUNX3

CagA

116, 117

Degradation of p53

Complex with ASPP2

N-terminal region

124, 126

Activation of HDM2 and ARF-BP1

127, 128

Inactivation of p53

Ectopic expression of AID

130

Activate invasion and metastasis

Induction of hummingbird cell

Deregulation of SHP2

pY-CagA

EPIpYA-C/EPIpYA-D

70, 85, 91, 92

Perturbation of focal adhesion dynamics

Dregulation of SHP2-FAK signaling

91

Loss of apicobasal cell polarity

Inhibition of PAR1b

CagA

CM motif

104, 123

Tight junctional defect

Inhibition of PAR1b

104

Adherence junctional defect

Complex with CRK

pY-CagA

Tyrosine phosphorylation

120

Altered stress fiber formation

Inhibition of PAR1b-GEF H1 signaling

CagA

CM motif

110

Induction of transdifferentiation

Ectopic expression of CDX1 and CDX2

118, 119

EMT-like morphological change

Junctional and apicobasal polarity defects

121,122,123

Cell death

Resistant to apoptosis

Complex with ASPP2

CagA

N-terminal region

124, 126

Promoting cell survival

Activation of MEK-ERK-MCL1 signaling

134

Genomic instability and mutation

Mitotic defects

Inhibition of PAR1b

CagA

CM motif

109

Hyper mutated phenotype

Ectopic expression of AID

130

CpG hypermethylation of MGMT

Potentiated by cagA

133

Induction of DNA double strand break

Inhibition of PAR1b

CagA

CM motif

131

Potentiated by cagPAI

132

Non-cell-autonomous pro-oncogenic actions

Induction of tumor-promoting inflammation

Sensitizing to NF-κB activation

Reduction of IκB in cells

CagA

CM motif

166

Activation of NF-κB

130

IKK activation via cMet-PI3K-AKT signaling

CM motif

114

IKK activation via TAK1-TRAF6 signaling

169

Induction of IL-1β

Inflammasome activation in epithelial cells

 

166

Induction of IL-8

Activation of PI3K

pY-CagA

EPIpYA-B

148

Activation of STAT3

IL-6/gp130 signaling

CagA

pY independent

170

Activation of NF-κB

Activation of Nod1

Peptidoglycan

171, 172

Activation of ALPK1-TIFA signaling

ADP heptose

174,175,176

Activation of TLR2, TLR4 signaling

Lipopolysaccharide

173

Activation of NLRP3-inflammasome

cag PAI

177,178,179