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Published in: Gastric Cancer 4/2021

01-07-2021 | Helicobacter Pylori | Original Article

Involvement of non-Helicobacter pylori helicobacter infections in Helicobacter pylori-negative gastric MALT lymphoma pathogenesis and efficacy of eradication therapy

Authors: Hidehiko Takigawa, Ryo Yuge, Satoshi Masaki, Rina Otani, Hiroki Kadota, Toshikatsu Naito, Ryohei Hayashi, Yuji Urabe, Shiro Oka, Shinji Tanaka, Kazuaki Chayama, Yasuhiko Kitadai

Published in: Gastric Cancer | Issue 4/2021

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Abstract

Background

Eradication therapy is known to be effective against Helicobacter pylori-positive gastric MALT lymphoma but predicting the efficacy of eradication therapy against Helicobacter pylori-negative gastric MALT lymphoma is difficult. Recent reports have shown that non-Helicobacter pylori helicobacter infections induce gastric MALT lymphoma, and we aimed to clarify whether non-Helicobacter pylori helicobacter infections are associated with the efficacy of eradication therapy.

Methods

We analyzed eradication therapy as a first-line treatment for 182 cases of gastric MALT lymphoma, classified according to Helicobacter pylori infection and API2-MALT1 mutation status. We also evaluated the non-Helicobacter pylori helicobacter infection status in 29 Helicobacter pylori-negative cases via PCR with DNA extracted from paraffin-embedded biopsy tissues. Finally, we analyzed the relationship between non-Helicobacter pylori helicobacter infection status and eradication therapy outcome.

Results

The API2-MALT1 mutation was observed in 13/182 patients (7.1%), none of whom were cured by eradication therapy. Helicobacter pylori-negative cases had a significantly higher non-Helicobacter pylori helicobacter infection rate than Helicobacter pylori-positive cases (16/29, 55% vs. 3/29, 10%; P < 0.05). Among the Helicobacter pylori-negative cases, non-Helicobacter pylori helicobacter-positive cases had a significantly higher complete response rate than non-Helicobacter pylori helicobacter-negative cases (12/16, 75% vs. 3/13, 23%; P < 0.05).

Conclusion

Helicobacter pylori-negative and API2-MALT1-negative gastric MALT lymphoma cases exhibited a high rate of non-Helicobacter pylori helicobacter infections, which may have contributed to the success of eradication therapy. Therefore, we recommend eradication therapy as a first-line treatment for non-Helicobacter pylori helicobacter-positive gastric MALT lymphoma.
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Metadata
Title
Involvement of non-Helicobacter pylori helicobacter infections in Helicobacter pylori-negative gastric MALT lymphoma pathogenesis and efficacy of eradication therapy
Authors
Hidehiko Takigawa
Ryo Yuge
Satoshi Masaki
Rina Otani
Hiroki Kadota
Toshikatsu Naito
Ryohei Hayashi
Yuji Urabe
Shiro Oka
Shinji Tanaka
Kazuaki Chayama
Yasuhiko Kitadai
Publication date
01-07-2021
Publisher
Springer Singapore
Published in
Gastric Cancer / Issue 4/2021
Print ISSN: 1436-3291
Electronic ISSN: 1436-3305
DOI
https://doi.org/10.1007/s10120-021-01172-x

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