{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T15:25:25Z","timestamp":1788276325207,"version":"build-2803163510"},"reference-count":85,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T00:00:00Z","timestamp":1754956800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Medical University of Lodz","award":["503\/3-045-02\/503-31-001"],"award-info":[{"award-number":["503\/3-045-02\/503-31-001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["CIMB"],"abstract":"<jats:p>While omega-6 fatty acids play an important role in normal cell function, their excess in the diet is associated with an increased risk of developing diseases such as obesity, non-alcoholic fatty liver disease (NAFLD), inflammatory bowel disease (IBD) and Alzheimer\u2019s disease. Furthermore, excessive intake has been shown to lead to chronic inflammation, which is related to increased production of reactive oxygen species (ROS). This conditioncan initiate lipid peroxidation in cell membranes, leading to the degradation of their fatty acids. One of the main products of omega-6 peroxidation is the \u03b1,\u03b2-unsaturated aldehyde, i.e., 4-hydroxynonenal (4-HNE), which is able to form four diastereoisomeric adducts with guanine. These 4-HNE adducts have been identified in the DNA of humans and rodents. Depending on their stereochemistry, they are able to influence double helix stability and cause DNA\u2013DNA or DNA\u2013Protein cross-links. Moreover, studies have shown that 4-HNE adducts formed in the human genome are considered mutation hotspots in hepatocellular carcinoma. Although the cell possesses defence mechanisms, without a well-balanced diet allowing correct cell function, they may not be sufficient to protect the genetic code. This review provides an overview of the molecular mechanisms underlying oxidative stress, lipid peroxidation, and the formation of DNA adducts. Particular emphasis is placed on the role of an omega-6-rich diet in inflammatory diseases, and on the formation of 4-HNE, which is a major product of lipid peroxidation, and its broader implications for genome stability, ageing, and disease progression.<\/jats:p>","DOI":"10.3390\/cimb47080645","type":"journal-article","created":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T07:53:44Z","timestamp":1754985224000},"page":"645","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Biochemical Battle: Influence of Omega-6 Fatty Acids on the Formation of DNA Adducts with 4-HNE"],"prefix":"10.3390","volume":"47","author":[{"given":"Edyta","family":"B\u0142aszczyk","sequence":"first","affiliation":[{"name":"Food Science Department, Faculty of Pharmacy, Medical University of Lodz, ul. Muszy\u0144skiego 1, 90-151 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6922-7834","authenticated-orcid":false,"given":"Boles\u0142aw T.","family":"Karwowski","sequence":"additional","affiliation":[{"name":"Food Science Department, Faculty of Pharmacy, Medical University of Lodz, ul. Muszy\u0144skiego 1, 90-151 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,8,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Maldonado, E., Morales-Pison, S., Urbina, F., and Solari, A. (2023). Aging Hallmarks and the role of Oxidative Stress. 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