Evidence map›Paper›PMID 41602911›Full record

ArticleiScience2026

Cellular and molecular profiling of collagenous gastritis implicates pathogenic CD4

Michael J Walsh, Lestat R Ali, Jiao Shen, Yuko Kinowaki, C Elizabeth Keleher, Enoch Chung, Komson Wannasai, Maria Ganci, Li Qiang, Mary Thompson and 6 more

Abstract read
In one paragraph

Article in iScience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors.

Michael J WalshDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Lestat R AliHarvard Medical School, Boston, MA, USA.
Jiao ShenDepartment of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA.
Yuko KinowakiDepartment of Pathology, Massachusetts General Hospital, Boston, MA, USA.
C Elizabeth KeleherDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Enoch ChungHarvard Medical School, Boston, MA, USA.
Komson WannasaiDepartment of Pathology, Massachusetts General Hospital, Boston, MA, USA.
Maria GanciDepartment of Pathology, Massachusetts General Hospital, Boston, MA, USA.
Li QiangDepartment of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA.
Mary ThompsonDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Jamie DiCarloDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Abigail Elvin-IveyDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Keri M SullivanDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Mari Mino-KenudsonHarvard Medical School, Boston, MA, USA.
Stephanie K DouganDepartment of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, USA.
Michael DouganDivision of Gastroenterology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Collagenous gastritis (CG) is a rare disease characterized by thick bands of subepithelial collagen within the stomach that presents with symptoms ranging from anemia to vomiting. Its etiology is poorly understood, and currently, there are no well-defined effective treatment options. We collected gastric and duodenal biopsies from seven patients with CG and several matched controls. Flow cytometry, histopathology, and single-cell RNA-seq (scRNA-seq) and T cell receptor (TCR)-sequencing were performed on samples to understand immune mechanisms underlying CG. Patients with CG had reduced parietal cells and enhance expression of collagen genes by fibroblasts. We identified a population of activated/exhausted lymphocytes, with increased CD4:CD8 ratios and decreased tissue-resident T cells in patients with CG compared to controls. We identified potential therapeutic targets, including integrin α4 expression (

Indexed as

biological sciencesimmune system disordertranscriptomics

Identifiers

PMID41602911
PMCPMC12834102

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.