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Erschienen in: Virchows Archiv 5/2022

08.01.2022 | Original Article

Tumor progression by epithelial-mesenchymal transition in ARID1A- and SMARCA4-aberrant solid-type poorly differentiated gastric adenocarcinoma

verfasst von: Taisuke Sasaki, Kenichi Kohashi, Shinichiro Kawatoko, Eikichi Ihara, Eiji Oki, Masafumi Nakamura, Yoshihiro Ogawa, Yoshinao Oda

Erschienen in: Virchows Archiv | Ausgabe 5/2022

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Abstract

Solid-type poorly differentiated adenocarcinoma (PDA) of the stomach is frequently associated with microsatellite instability (MSI) and aberrations of the SWI/SNF chromatin remodeling complex. Previous studies showed that aberrant ARID1A and SMARCA4 expression induces mesenchymal transition. We analyzed 51 primary-site cases and 209 metastatic lymph nodes among solid-type PDA for the expression of SWI/SNF complex subunits (ARID1A, SMARCA4, SMARCB1, SMARCC2) and epithelial-mesenchymal transition (EMT) markers (E-cadherin, β-catenin, Snail). We also analyzed 40 cases of non-solid-type PDA as a stage-matched control group. Aberrant expression of ARID1A (39%) and SMARCA4 (49%) was more common in solid-type PDA than in non-solid-type PDA (ARID1A, P = 0.0049; SMARCA4, P < 0.0001). The group of solid-type PDA with aberrant ARID1A showed significantly longer overall and progression-free survival than the corresponding ARID1A-retained group (P = 0.0405 and P = 0.0296, respectively). Aberrant expression of EMT factors inducing mesenchymal transition in the groups with solid-type PDA at the primary site or metastatic lymph nodes with aberrant ARID1A was less common than in the corresponding groups with retained ARID1A (E-cadherin, primary site P = 0.0341, lymph node P < 0.0001; β-catenin, primary site P = 0.0293, lymph node P = 0.0010; Snail, primary site P = 0.0169, lymph node P = 0.0828). Furthermore, N3 of the TNM classification was more frequently observed in the group with solid-type PDA with retained ARID1A than in the corresponding ARID1A-aberrant group (P = 0.0288). Mesenchymal transition was not induced in the ARID1A-aberrant group, in which patients had favorable prognosis, and preserved epithelial characteristics in EMT may play an important role in low tumor aggressiveness of solid-type PDA.
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Metadaten
Titel
Tumor progression by epithelial-mesenchymal transition in ARID1A- and SMARCA4-aberrant solid-type poorly differentiated gastric adenocarcinoma
verfasst von
Taisuke Sasaki
Kenichi Kohashi
Shinichiro Kawatoko
Eikichi Ihara
Eiji Oki
Masafumi Nakamura
Yoshihiro Ogawa
Yoshinao Oda
Publikationsdatum
08.01.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
Virchows Archiv / Ausgabe 5/2022
Print ISSN: 0945-6317
Elektronische ISSN: 1432-2307
DOI
https://doi.org/10.1007/s00428-021-03261-9

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