Genomic features of Helicobacter pylori‐naïve diffuse‐type gastric cancer

Helicobacter pylori (HP) is a major etiologic driver of diffuse‐type gastric cancer (DGC). However, improvements in hygiene have led to an increase in the prevalence of HP‐naïve DGC; that is, DGC that occurs independent of HP. Although multiple genomic cohort studies for gastric cancer have been con...

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Veröffentlicht in:The Journal of pathology 2022-11, Vol.258 (3), p.300-311
Hauptverfasser: Namikawa, Ken, Tanaka, Norio, Ota, Yuki, Takamatsu, Manabu, Kosugi, Mayuko, Tokai, Yoshitaka, Yoshimizu, Shoichi, Horiuchi, Yusuke, Ishiyama, Akiyoshi, Yoshio, Toshiyuki, Hirasawa, Toshiaki, Amino, Sayuri, Furuya, Rie, Gotoh, Osamu, Kaneyasu, Tomoko, Nakayama, Izuma, Imamura, Yu, Noda, Tetsuo, Fujisaki, Junko, Mori, Seiichi
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container_issue 3
container_start_page 300
container_title The Journal of pathology
container_volume 258
creator Namikawa, Ken
Tanaka, Norio
Ota, Yuki
Takamatsu, Manabu
Kosugi, Mayuko
Tokai, Yoshitaka
Yoshimizu, Shoichi
Horiuchi, Yusuke
Ishiyama, Akiyoshi
Yoshio, Toshiyuki
Hirasawa, Toshiaki
Amino, Sayuri
Furuya, Rie
Gotoh, Osamu
Kaneyasu, Tomoko
Nakayama, Izuma
Imamura, Yu
Noda, Tetsuo
Fujisaki, Junko
Mori, Seiichi
description Helicobacter pylori (HP) is a major etiologic driver of diffuse‐type gastric cancer (DGC). However, improvements in hygiene have led to an increase in the prevalence of HP‐naïve DGC; that is, DGC that occurs independent of HP. Although multiple genomic cohort studies for gastric cancer have been conducted, including studies for DGC, distinctive genomic differences between HP‐exposed and HP‐naïve DGC remain largely unknown. Here, we employed exome and RNA sequencing with immunohistochemical analyses to perform binary comparisons between 36 HP‐exposed and 27 HP‐naïve DGCs from sporadic, early‐stage, and intramucosal or submucosal tumor samples. Among the samples, 33 HP‐exposed and 17 HP‐naïve samples had been preserved as fresh‐frozen samples. HP infection status was determined using stringent criteria. HP‐exposed DGCs exhibited an increased single nucleotide variant burden (HP‐exposed DGCs; 1.97 [0.48–7.19] and HP‐naïve DGCs; 1.09 [0.38–3.68] per megabase; p = 0.0003) and a higher prevalence of chromosome arm‐level aneuploidies (p 
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However, improvements in hygiene have led to an increase in the prevalence of HP‐naïve DGC; that is, DGC that occurs independent of HP. Although multiple genomic cohort studies for gastric cancer have been conducted, including studies for DGC, distinctive genomic differences between HP‐exposed and HP‐naïve DGC remain largely unknown. Here, we employed exome and RNA sequencing with immunohistochemical analyses to perform binary comparisons between 36 HP‐exposed and 27 HP‐naïve DGCs from sporadic, early‐stage, and intramucosal or submucosal tumor samples. Among the samples, 33 HP‐exposed and 17 HP‐naïve samples had been preserved as fresh‐frozen samples. HP infection status was determined using stringent criteria. HP‐exposed DGCs exhibited an increased single nucleotide variant burden (HP‐exposed DGCs; 1.97 [0.48–7.19] and HP‐naïve DGCs; 1.09 [0.38–3.68] per megabase; p = 0.0003) and a higher prevalence of chromosome arm‐level aneuploidies (p &lt; 0.0001). CDH1 was mutated at similar frequencies in both groups, whereas the RHOA–ARHGAP pathway misregulation was exclusive to HP‐exposed DGCs (p = 0.0167). HP‐exposed DGCs showed gains in chromosome arms 8p/8q (p &lt; 0.0001), 7p (p = 0.0035), and 7q (p = 0.0354), and losses in 16q (p = 0.0167). Immunohistochemical analyses revealed a higher expression of intestinal markers such as CD10 (p &lt; 0.0001) and CDX2 (p = 0.0002) and a lower expression of the gastric marker, MUC5AC (p = 0.0305) among HP‐exposed DGCs. HP‐naïve DGCs, on the other hand, had a purely gastric marker phenotype. This work reveals that HP‐naïve and HP‐exposed DGCs develop along different molecular pathways, which provide a basis for early detection strategies in high incidence settings. © 2022 The Authors. 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However, improvements in hygiene have led to an increase in the prevalence of HP‐naïve DGC; that is, DGC that occurs independent of HP. Although multiple genomic cohort studies for gastric cancer have been conducted, including studies for DGC, distinctive genomic differences between HP‐exposed and HP‐naïve DGC remain largely unknown. Here, we employed exome and RNA sequencing with immunohistochemical analyses to perform binary comparisons between 36 HP‐exposed and 27 HP‐naïve DGCs from sporadic, early‐stage, and intramucosal or submucosal tumor samples. Among the samples, 33 HP‐exposed and 17 HP‐naïve samples had been preserved as fresh‐frozen samples. HP infection status was determined using stringent criteria. HP‐exposed DGCs exhibited an increased single nucleotide variant burden (HP‐exposed DGCs; 1.97 [0.48–7.19] and HP‐naïve DGCs; 1.09 [0.38–3.68] per megabase; p = 0.0003) and a higher prevalence of chromosome arm‐level aneuploidies (p &lt; 0.0001). CDH1 was mutated at similar frequencies in both groups, whereas the RHOA–ARHGAP pathway misregulation was exclusive to HP‐exposed DGCs (p = 0.0167). HP‐exposed DGCs showed gains in chromosome arms 8p/8q (p &lt; 0.0001), 7p (p = 0.0035), and 7q (p = 0.0354), and losses in 16q (p = 0.0167). Immunohistochemical analyses revealed a higher expression of intestinal markers such as CD10 (p &lt; 0.0001) and CDX2 (p = 0.0002) and a lower expression of the gastric marker, MUC5AC (p = 0.0305) among HP‐exposed DGCs. HP‐naïve DGCs, on the other hand, had a purely gastric marker phenotype. This work reveals that HP‐naïve and HP‐exposed DGCs develop along different molecular pathways, which provide a basis for early detection strategies in high incidence settings. © 2022 The Authors. The Journal of Pathology published by John Wiley &amp; Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.</description><subject>CDX2 protein</subject><subject>chromosome arm‐level aneuploidy</subject><subject>Chromosomes</subject><subject>diffuse‐type gastric cancer</subject><subject>E-cadherin</subject><subject>exome sequencing</subject><subject>Gastric cancer</subject><subject>gastric marker</subject><subject>Gastric Mucosa - pathology</subject><subject>Genomics</subject><subject>Helicobacter Infections - complications</subject><subject>Helicobacter pylori</subject><subject>Helicobacter pylori - genetics</subject><subject>Humans</subject><subject>Hygiene</subject><subject>immunohistochemistry</subject><subject>intestinal marker</subject><subject>Nucleotides - metabolism</subject><subject>Original</subject><subject>Phenotypes</subject><subject>RhoA protein</subject><subject>RHOA–ARHGAP pathway</subject><subject>RNA sequencing</subject><subject>Stomach Neoplasms - pathology</subject><subject>Tumors</subject><issn>0022-3417</issn><issn>1096-9896</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>EIF</sourceid><recordid>eNp10UFO3DAUBmCrKipT2gUXqCJ1UxaBZ8_YjjdICBUGCdEu6NpynGcwysSpnVDNrkfoTXqI3oST4DAUUaSuLPl9_vWsn5BdCvsUgB30ZrjeFwDwiswoKFGqSonXZJZnrJwvqNwmb1O6yUApzt-Q7bmglHJBZ-TiFLuw8rZwaIYxYiqCK5bYehtqYweMRb9uQ_R3P3915s_vWywa79yYMF8M6x6LK5OGmN9b01mM78iWM23C94_nDvl28vnyeFmefzk9Oz46Ly0HBaWDmjNmFrWhVVVL11CG3NiGIcgFd6aas6ZBKsFJZ7lF21SCIqBwFVeGivkOOdzk9mO9wsZiN0TT6j76lYlrHYzX_046f62vwq1WFeNKQQ749BgQw_cR06BXPllsW9NhGJNmklEmgC1Yph9f0Jswxi5_b1IguZRiUnsbZWNIKaJ7WoaCnlrSU0t6ainbD8-3f5J_a8ngYAN--BbX_0_SX48ulw-R9xVqoKA</recordid><startdate>202211</startdate><enddate>202211</enddate><creator>Namikawa, Ken</creator><creator>Tanaka, Norio</creator><creator>Ota, Yuki</creator><creator>Takamatsu, Manabu</creator><creator>Kosugi, Mayuko</creator><creator>Tokai, Yoshitaka</creator><creator>Yoshimizu, Shoichi</creator><creator>Horiuchi, Yusuke</creator><creator>Ishiyama, Akiyoshi</creator><creator>Yoshio, Toshiyuki</creator><creator>Hirasawa, Toshiaki</creator><creator>Amino, Sayuri</creator><creator>Furuya, Rie</creator><creator>Gotoh, Osamu</creator><creator>Kaneyasu, Tomoko</creator><creator>Nakayama, Izuma</creator><creator>Imamura, Yu</creator><creator>Noda, Tetsuo</creator><creator>Fujisaki, Junko</creator><creator>Mori, Seiichi</creator><general>John Wiley &amp; 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However, improvements in hygiene have led to an increase in the prevalence of HP‐naïve DGC; that is, DGC that occurs independent of HP. Although multiple genomic cohort studies for gastric cancer have been conducted, including studies for DGC, distinctive genomic differences between HP‐exposed and HP‐naïve DGC remain largely unknown. Here, we employed exome and RNA sequencing with immunohistochemical analyses to perform binary comparisons between 36 HP‐exposed and 27 HP‐naïve DGCs from sporadic, early‐stage, and intramucosal or submucosal tumor samples. Among the samples, 33 HP‐exposed and 17 HP‐naïve samples had been preserved as fresh‐frozen samples. HP infection status was determined using stringent criteria. HP‐exposed DGCs exhibited an increased single nucleotide variant burden (HP‐exposed DGCs; 1.97 [0.48–7.19] and HP‐naïve DGCs; 1.09 [0.38–3.68] per megabase; p = 0.0003) and a higher prevalence of chromosome arm‐level aneuploidies (p &lt; 0.0001). CDH1 was mutated at similar frequencies in both groups, whereas the RHOA–ARHGAP pathway misregulation was exclusive to HP‐exposed DGCs (p = 0.0167). HP‐exposed DGCs showed gains in chromosome arms 8p/8q (p &lt; 0.0001), 7p (p = 0.0035), and 7q (p = 0.0354), and losses in 16q (p = 0.0167). Immunohistochemical analyses revealed a higher expression of intestinal markers such as CD10 (p &lt; 0.0001) and CDX2 (p = 0.0002) and a lower expression of the gastric marker, MUC5AC (p = 0.0305) among HP‐exposed DGCs. HP‐naïve DGCs, on the other hand, had a purely gastric marker phenotype. This work reveals that HP‐naïve and HP‐exposed DGCs develop along different molecular pathways, which provide a basis for early detection strategies in high incidence settings. © 2022 The Authors. The Journal of Pathology published by John Wiley &amp; Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.</abstract><cop>Chichester, UK</cop><pub>John Wiley &amp; Sons, Ltd</pub><pmid>36111561</pmid><doi>10.1002/path.6000</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-9363-4584</orcidid><orcidid>https://orcid.org/0000-0003-2724-8009</orcidid><oa>free_for_read</oa></addata></record>
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source MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects CDX2 protein
chromosome arm‐level aneuploidy
Chromosomes
diffuse‐type gastric cancer
E-cadherin
exome sequencing
Gastric cancer
gastric marker
Gastric Mucosa - pathology
Genomics
Helicobacter Infections - complications
Helicobacter pylori
Helicobacter pylori - genetics
Humans
Hygiene
immunohistochemistry
intestinal marker
Nucleotides - metabolism
Original
Phenotypes
RhoA protein
RHOA–ARHGAP pathway
RNA sequencing
Stomach Neoplasms - pathology
Tumors
title Genomic features of Helicobacter pylori‐naïve diffuse‐type gastric cancer
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