CCL8 as a promising prognostic factor in diffuse large B-cell lymphoma via M2 macrophage interactions: A bioinformatic analysis of the tumor microenvironment.

{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:36072582", "kind": "science-record", "revision": 4, "content_hash": "sha256:0c5673246fb961f94a70ba9d5fa29805b89789b01517f401ce0fc1e58344e90a", "created_at": "2026-11-01T18:15:17Z", "updated_at": "2026-11-01T22:07:29Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "CCL8 as a promising prognostic factor in diffuse large B-cell lymphoma via M2 macrophage interactions: A bioinformatic analysis of the tumor microenvironment.", "doi": "10.3389/fimmu.2022.950213", "pmid": "36072582", "authors": ["Xiaoli Lou", "Ke Zhao", "Jingze Xu", "Lixiong Shuai", "Hui Niu", "Zhifei Cao", "Juan Wang", "Yongsheng Zhang"], "journal": "Frontiers in immunology", "year": 2022, "abstract": "Backgrounds: Prior investigations of the tumor microenvironment (TME) of diffuse large B-cell lymphoma (DLBCL) have shown that immune and stromal cells are key contributing factors to patients' outcome. However, challenges remain in finding reliable prognostic biomarkers based on cell infiltration. In this study, we attempted to shed some light on chemokine C-C motif chemokine ligand 8 (CCL8) in DLBCL via interaction with M2 macrophages.\nMethods: The Estimation of STromal and Immune cells in MAlignant Tumor tissues using Expression data (ESTIMATE) algorithm was applied to evaluate immune and stromal scores from transcriptomic profiles of 443 DLBCL samples from The Cancer Genome Atlas (TCGA) and GSE10846 datasets. Immune cell infiltration (ICI) clusters were obtained based on different immune cell infiltrations of each sample, and gene clusters were derived through differentially expressed genes (DEGs) between the distinct ICI clusters. Five immune-related hub genes related to overall survival (OS) and clinical stages were obtained by COX regression analysis and protein-protein interaction (PPI) network construction then verified by quantitative real-time PCR (qPCR) and immunofluorescence staining in the FFPE tissues. The Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and TIMER websites were employed to explore the biological functions of CCL8-related DEGs. Uni- and multivariable Cox regression analyses were performed to analyze CCL8 as an independent prognostic risk factor in GSE10846 and were verified in other independent GEO cohorts.\nResults: A higher stromal score was associated with favorable prognosis in DLBCL. Patients in the ICI B cluster and gene B clusters had a better follow-up status with a higher programmed death ligand 1 (PD-L1) and cytotoxic T-lymphocyte antigen 4 (CTLA4) expression. Most of ICI-related DEGs were enriched for immune-related signaling pathways. Five hub genes with a distinct prognosis association were identified, including CD163, which is a biomarker of M2 macrophages, and CCL8. Abundant M2 macrophages were discovered in the high-CCL8 expression group. The functional analysis indicated that CCL8 is a key component of immune-related processes and secretory granule groups. Cox regression analysis and data from other GSE datasets yielded additional evidence of the prognostic value of CCL8 in DLBCL.\nConclusions: CCL8 has been implicated in macrophage recruitment in several solid tumors, and only a few reports have been published on the role of CCL8 in the pathogenesis of hematological malignancies. This article attempted to find out TME-related genes that associated with the survival in DLBCL patients. CCL8 was identified to be involved in immune activities. Importantly, a series of bioinformatics analysis indicated that CCL8 might become an effective target for DLBCL, which interacts with M2 macrophage and immune checkpoint. The potential related mechanisms need to be further elucidated.", "claims": [{"id": "claim-method", "statement": "The Kaplan–Meier method was utilized for plotting survival curves. The corresponding significance of survival curves was quantified by log-rank tests.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:36072582", "locator": "sections[11] \"Survival analysis\" paragraph 2", "quote": "The Kaplan–Meier method was utilized for plotting survival curves. The corresponding significance of survival curves was quantified by log-rank tests."}], "state": "complete"}, {"id": "claim-data-access", "statement": "The original contributions presented in the study are included in the article/ Supplementary Material . Further inquiries can be directed to the corresponding authors.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:36072582", "locator": "sections[24] \"Data availability statement\" paragraph 2", "quote": "The original contributions presented in the study are included in the article/ Supplementary Material . Further inquiries can be directed to the corresponding authors."}], "state": "complete"}, {"id": "claim-target-result", "statement": "Kaplan–Meier plots indicated that patients with higher stromal score and ESTIMATE score groups showed significantly higher survival probability (P < 0.01 and P = 0.005, Figure 2A ).", "kind": "qualitative", "target": null, "evidence": [{"asset": "source:pmid:36072582", "locator": "sections[16] \"Association between estimated infiltrated cells, DLBCL prognosis, and clinical features\" paragraph 2", "quote": "Kaplan–Meier plots indicated that patients with higher stromal score and ESTIMATE score groups showed significantly higher survival probability (P < 0.01 and P = 0.005, Figure 2A )."}], "state": "complete"}], "gaps": []}, "experiment": {"state": "complete", "objective": "Kaplan–Meier plots indicated that patients with higher stromal score and ESTIMATE score groups showed significantly higher survival probability (P < 0.01 and P = 0.005, Figure 2A ).", "steps": [{"id": "read_published_estimate", "order": 1, "name": "Read the published estimate from the source", "kind": "other", "state": "complete", "blocked_on": null, "description": "The claim, method and evidence span published with the source article.", "duration_hours": null, "parameters": {}, "inputs": ["source:pmid:36072582"], "outputs": ["the published estimate and its evidence"], "instruments": [], "reagents": []}, {"id": "obtain_source_data", "order": 2, "name": "Obtain the source data from the named repository", "kind": "data-preparation", "state": "complete", "blocked_on": null, "description": "The GEO series accession resolves and its sample accessions are listed. 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