{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T17:34:13Z","timestamp":1787592853198,"version":"build-2736575974"},"reference-count":68,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T00:00:00Z","timestamp":1770681600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Immunol."],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Late graft loss due to chronic renal allograft fibrosis remains a major challenge after kidney transplantation. Excessive immune-cell activation is a key driver of allograft fibrosis; however, the underlying mechanisms remain incompletely understood. Recent studies have implicated lactylation, a post-translational protein modification derived from lactate, in immune activation. Nonetheless, the role of lactylation in renal allograft fibrosis has not been systematically explored.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Transcriptomic datasets from kidney transplant recipients with and without interstitial fibrosis\/tubular atrophy (IFTA) were obtained from the GEO database. Differentially expressed genes were intersected with lactylation-related genes (LRGs) to identify differentially expressed LRGs (DELRGs). Functional enrichment analyses were performed to explore associated biological processes and pathways. Weighted gene co-expression network analysis (WGCNA) combined with multiple machine-learning algorithms was used to screen for hub genes. A lactylation-related risk score (LRS) was constructed and validated across independent cohorts, and its predictive performance was evaluated by receiver operating characteristic (ROC) analysis. Single-nucleus RNA sequencing (snRNA-seq) data from allograft biopsies (GSE195718) were processed with Seurat and Harmony for clustering and annotation; cell type\u2013specific hub LRG expression and lactylation scores were profiled. Two murine renal fibrosis models were established to validate the expression of hub genes and to assess their associations with immune-cell infiltration.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      We identified five hub LRGs\u2014\n                      <jats:italic>IKZF1, PDLIM1, S100A11, STAT4<\/jats:italic>\n                      and\n                      <jats:italic>SLC2A3<\/jats:italic>\n                      \u2014that were strongly associated with renal allograft fibrosis. These genes were closely linked to pathways related to lactate metabolism, immune activation and oxidative stress. The LRS based on these genes showed robust predictive accuracy in both the training and validation cohorts. In addition, snRNA-seq of allograft biopsies localized hub LRGs predominantly to immune-lineage and stromal clusters with higher lactylation scores in IFTA samples; concordantly, immune-infiltration analyses revealed significant positive correlations between hub LRGs and multiple immune-cell subsets. Furthermore, these hub genes were upregulated in murine models of renal fibrosis.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This study identified five lactylation-related hub genes that are closely associated with immune-cell infiltration and exhibit strong predictive performance, suggesting their potential as diagnostic biomarkers and therapeutic targets in renal allograft fibrosis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fimmu.2026.1741864","type":"journal-article","created":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T07:41:45Z","timestamp":1770795705000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["Identification of lactylation and its hub genes in contributing immune activation and renal allograft fibrosis by integrative bioinformatics and machine learning"],"prefix":"10.3389","volume":"17","author":[{"given":"Feifei","family":"Yuan","sequence":"first","affiliation":[{"name":"Division of Nephrology, Nanfang Hospital, Southern Medical University","place":["Guangzhou, China"]},{"name":"National Clinical Research Center for Kidney Disease","place":["Guangzhou, China"]},{"name":"State Key Laboratory of Multi-organ Injury Prevention and Treatment","place":["Guangzhou, China"]},{"name":"Guangdong Provincial Institute of Nephrology","place":["Guangzhou, China"]},{"name":"Guangdong Provincial Key Laboratory of Renal Failure Research","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiewu","family":"Huang","sequence":"additional","affiliation":[{"name":"Division of Nephrology, Nanfang Hospital, Southern Medical University","place":["Guangzhou, China"]},{"name":"National Clinical Research Center for Kidney Disease","place":["Guangzhou, China"]},{"name":"State Key Laboratory of 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Guangzhou","place":["Guangdong, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lili","family":"Zhou","sequence":"additional","affiliation":[{"name":"Division of Nephrology, Nanfang Hospital, Southern Medical University","place":["Guangzhou, China"]},{"name":"National Clinical Research Center for Kidney Disease","place":["Guangzhou, China"]},{"name":"State Key Laboratory of Multi-organ Injury Prevention and Treatment","place":["Guangzhou, China"]},{"name":"Guangdong Provincial Institute of Nephrology","place":["Guangzhou, China"]},{"name":"Guangdong Provincial Key Laboratory of Renal Failure Research","place":["Guangzhou, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,2,10]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","DOI":"10.1016\/j.trre.2024.100833","article-title":"Latest advances in frailty in kidney transplantation: A narrative 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