TY - JOUR
T1 - Functional antagonism between CagA and DLC1 in gastric cancer
AU - Hinsenkamp, Isabel
AU - Köhler, Jan P.
AU - Flächsenhaar, Christoph
AU - Hitkova, Ivana
AU - Meessen, Sabine Eberhart
AU - Gaiser, Timo
AU - Wieland, Thomas
AU - Weiss, Christel
AU - Röcken, Christoph
AU - Mowat, Michael
AU - Quante, Michael
AU - Taxauer, Karin
AU - Mejias-Luque, Raquel
AU - Gerhard, Markus
AU - Vogelmann, Roger
AU - Meindl-Beinker, Nadja
AU - Ebert, Matthias
AU - Burgermeister, Elke
N1 - Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Helicobacter (H.) pylori-induced gastritis is a risk factor for gastric cancer (GC). Deleted-in-liver-cancer-1 (DLC1/ARHGAP7) inhibits RHOA, a downstream mediator of virulence factor cytotoxin-A (CagA) signalling and driver of consensus-molecular-subtype-2 diffuse GC. DLC1 located to enterochromaffin-like and MIST1+ stem/chief cells in the stomach. DLC1+ cells were reduced in H. pylori gastritis and GC, and in mice infected with H. pylori. DLC1 positivity inversely correlated with tumour progression in patients. GC cells retained an N-terminal truncation variant DLC1v4 in contrast to full-length DLC1v1 in non-neoplastic tissues. H. pylori and CagA downregulated DLC1v1/4 promoter activities. DLC1v1/4 inhibited cell migration and counteracted CagA-driven stress phenotypes enforcing focal adhesion. CagA and DLC1 interacted via their N- and C-terminal domains, proposing that DLC1 protects against H. pylori by neutralising CagA. H. pylori-induced DLC1 loss is an early molecular event, which makes it a potential marker or target for subtype-aware cancer prevention or therapy.
AB - Helicobacter (H.) pylori-induced gastritis is a risk factor for gastric cancer (GC). Deleted-in-liver-cancer-1 (DLC1/ARHGAP7) inhibits RHOA, a downstream mediator of virulence factor cytotoxin-A (CagA) signalling and driver of consensus-molecular-subtype-2 diffuse GC. DLC1 located to enterochromaffin-like and MIST1+ stem/chief cells in the stomach. DLC1+ cells were reduced in H. pylori gastritis and GC, and in mice infected with H. pylori. DLC1 positivity inversely correlated with tumour progression in patients. GC cells retained an N-terminal truncation variant DLC1v4 in contrast to full-length DLC1v1 in non-neoplastic tissues. H. pylori and CagA downregulated DLC1v1/4 promoter activities. DLC1v1/4 inhibited cell migration and counteracted CagA-driven stress phenotypes enforcing focal adhesion. CagA and DLC1 interacted via their N- and C-terminal domains, proposing that DLC1 protects against H. pylori by neutralising CagA. H. pylori-induced DLC1 loss is an early molecular event, which makes it a potential marker or target for subtype-aware cancer prevention or therapy.
UR - http://www.scopus.com/inward/record.url?scp=85135786884&partnerID=8YFLogxK
U2 - 10.1038/s41420-022-01134-x
DO - 10.1038/s41420-022-01134-x
M3 - Article
AN - SCOPUS:85135786884
SN - 2058-7716
VL - 8
JO - Cell Death Discovery
JF - Cell Death Discovery
IS - 1
M1 - 358
ER -