{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T17:00:37Z","timestamp":1773334837547,"version":"3.50.1"},"reference-count":83,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T00:00:00Z","timestamp":1773014400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Wilhelm Sander Stiftung","award":["2022.116.1"],"award-info":[{"award-number":["2022.116.1"]}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"crossref","award":["324392634"],"award-info":[{"award-number":["324392634"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"crossref"}]},{"name":"FP7-People-2012-ITN","award":["315963"],"award-info":[{"award-number":["315963"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Gastrointestinal acute graft-versus-host disease (GI aGvHD) remains a leading cause of non-relapse mortality after allogeneic hematopoietic stem cell transplantation (HSCT). Current diagnostic methods rely on invasive procedures with limited sensitivity. While circulating biomarkers have been proposed, little is known about the local transcriptomic landscape within inflamed GI tissue. We performed integrated profiling of mRNA and microRNA expression in colonoscopically resected GI biopsies from n = 8 HSCT patients, including n = 3 with histologically confirmed GI aGvHD and n = 5 without. Using NanoString nCounter technology, we quantified 770 immune-related mRNAs and 799 mature human microRNAs. Differential expression analysis, pathway enrichment, cell type deconvolution, and machine learning\u2013based biomarker prioritisation were conducted to define disease-specific molecular signatures. GI aGvHD was marked by upregulation of inflammatory genes (e.g., IL1B, IL17RA, HLA-DRA) and immune-regulatory microRNAs (e.g., miR-155-3p, miR-223-3p), alongside downregulation of epithelial and anti-inflammatory markers (ST6GAL1, THBS1, miR-1915-3p, miR-145-5p). Enrichment analyses revealed activation of IL2\/STAT5, JAK\/STAT3, TCR signalling, and antigen presentation pathways. Machine learning identified LCN2, CXCL13, and miR-1269b as top-ranked biomarker candidates. Cell deconvolution showed increased M0 macrophage and decreased dendritic cell signatures in aGvHD tissue. This is the first study to integrate mRNA and microRNA profiling in GI tissue using NanoString technology to characterise the immune and epithelial transcriptomic landscape of aGvHD. Our findings reveal dysregulated immune pathways, altered myeloid cell populations, and novel biomarker candidates, offering tissue-specific insights into disease pathogenesis and potential diagnostic targets. Larger validation studies and functional assays are warranted to confirm clinical utility.<\/jats:p>","DOI":"10.3390\/ijms27052513","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T15:49:42Z","timestamp":1773071382000},"page":"2513","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Tissue-Based Transcriptomic Profiling of Gastrointestinal Graft Versus Host Disease Reveals Immune and MicroRNA Dysregulation"],"prefix":"10.3390","volume":"27","author":[{"given":"Sakhila","family":"Ghimire","sequence":"first","affiliation":[{"name":"Department of Internal Medicine III, University Medical Centre, 93053 Regensburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean","family":"Norden","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rihab","family":"Gam","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9435-7398","authenticated-orcid":false,"given":"Clare","family":"Lendrem","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ernst","family":"Holler","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine III, University Medical Centre, 93053 Regensburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne M.","family":"Dickinson","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6138-160X","authenticated-orcid":false,"given":"Rachel E.","family":"Crossland","sequence":"additional","affiliation":[{"name":"Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Langer, R., Lelas, A., Rittenschober, M., Piekarska, A., Sadowska-Klasa, A., Sabol, I., Desnica, L., Greinix, H., Dickinson, A., and Inngjerdingen, M. 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