{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T23:04:56Z","timestamp":1787785496622,"version":"build-2784847793"},"reference-count":122,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T00:00:00Z","timestamp":1741046400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Charles University","award":["START\/MED\/089"],"award-info":[{"award-number":["START\/MED\/089"]}]},{"name":"Cooperatio Program, Research area Oncology\/Hematology","award":["START\/MED\/089"],"award-info":[{"award-number":["START\/MED\/089"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ncRNA"],"abstract":"<jats:p>Circular RNAs (circRNAs) make up approximately 10% of the human transcriptome. CircRNAs belong to the broad group of non-coding RNAs and characteristically are formed by backsplicing into a stable circular loop. Their main role is to regulate transcription through the inhibition of miRNAs\u2019 expression, termed miRNA sponging. CircRNAs promote tumorigenesis\/lymphomagenesis by competitively binding to miRNAs at miRNA binding sites. In diffuse large B-cell lymphoma (DLBCL), several circRNAs have been identified and their expression is related to both progression and response to therapy. DLBCL is the most prevalent and aggressive subtype of B-cell lymphomas and accounts for about 25% to 30% of all non-Hodgkin lymphomas. DLBCL displays great heterogeneity concerning histopathology, biology, and genetics. Patients who have relapsed or have refractory disease after first-line therapy have a very poor prognosis, demonstrating an important unmet need for new treatment options. As more circRNAs are identified in the future, we will better understand their biological roles and potential use in treating cancer, including DLBCL. For example, circAmotl1 promotes nuclear translocation of MYC and upregulation of translational targets of MYC, thus enhancing lymphomagenesis. Another example is circAPC, which is significantly downregulated in DLBCL and correlates with disease aggressiveness and poor prognosis. CircAPC increases expression of the host gene adenomatous polyposis coli (APC), and in doing so inactivates the canonical Wnt\/\u03b2-catenin signaling and restrains DLBCL growth. MiRNAs belong to the non-coding regulatory molecules that significantly contribute to lymphomagenesis through their target mRNAs. In DLBCL, among the highly expressed miRNAs, are miR-155-5p and miR-21-5p, which regulate NF-\u0138B and PI3K\/AKT signaling pathways. The aim of this review is to describe the function and mechanism of regulation of circRNAs on miRNAs\u2019 expression in DLBCL. This will help us to better understand the regulatory network of circRNA\/miRNA\/mRNA, and to propose novel therapeutic targets to treat DLBCL.<\/jats:p>","DOI":"10.3390\/ncrna11020022","type":"journal-article","created":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T10:43:31Z","timestamp":1741085011000},"page":"22","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Mechanism of Action of circRNA\/miRNA Network in DLBCL"],"prefix":"10.3390","volume":"11","author":[{"given":"Elena","family":"Golovina","sequence":"first","affiliation":[{"name":"First Faculty of Medicine, Institute of Pathological Physiology, Charles University, 12108 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cory","family":"Eaton","sequence":"additional","affiliation":[{"name":"First Faculty of Medicine, Institute of Pathological Physiology, Charles University, 12108 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Virginia","family":"Cox","sequence":"additional","affiliation":[{"name":"First Faculty of Medicine, Institute of Pathological Physiology, Charles University, 12108 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jozef","family":"Andel","sequence":"additional","affiliation":[{"name":"First Faculty of Medicine, Institute of Pathological Physiology, Charles University, 12108 Prague, Czech Republic"},{"name":"Faculty of Science, Molecular Biology and Genetics of Eukaryotes, Charles University, 12800 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4969-4133","authenticated-orcid":false,"given":"Karina","family":"Savvulidi Vargova","sequence":"additional","affiliation":[{"name":"First Faculty of Medicine, Institute of Pathological Physiology, Charles University, 12108 Prague, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1016\/j.critrevonc.2012.12.009","article-title":"Diffuse large B-cell lymphoma","volume":"87","author":"Martelli","year":"2013","journal-title":"Crit. 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