PMID- 31595252 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220410 IS - 2444-8672 (Electronic) IS - 2444-8664 (Print) IS - 2444-8664 (Linking) VI - 4 IP - 1 DP - 2019 Jan-Feb TI - Xanthohumol and 8-prenylnaringenin reduce type 2 diabetes-associated oxidative stress by downregulating galectin-3. PG - e23 LID - 10.1016/j.pbj.0000000000000023 [doi] LID - e23 AB - BACKGROUND: Galectin-3 (Gal3) expression is associated with accumulation of Advanced Glycation End products (AGE), a common feature in diabetes mellitus (DM). The role of Gal3 in oxidative stress is, however, controversial, being considered in the literature to play either a protective role or exacerbating disease. METHODS: Herein, we examined the interplay between Gal3 and oxidative stress in a high-fat diet -induced type 2 DMC57Bl/6 mice model. Because natural polyphenols are known to play antioxidant and anti-inflammatory roles and to modulate metabolic activity, we further evaluated the effect of xanthohumol and 8-prenylnaringenin polyphenols in this crosstalk. RESULTS: Gal3 expression was accompanied by 3-nitrotyrosine and AGE production in liver and kidney of diabetic mice compared to healthy animals (fed with standard diet). Oral supplementation with polyphenols decreased the levels of these oxidative biomarkers as evaluated by immunohistochemistry and western blotting. Interestingly, blocking Gal3 by incubating human microvascular endothelial cells with modified citrus pectin increased 3-nitrotyrosine protein expression. CONCLUSIONS: These findings imply that Gal3 overexpression is probably controlling oxidative stress in endothelial cells. In conclusion, our results indicate that supplementation with 8-prenylnaringenin or xanthohumol reverses diabetes-associated oxidation in liver and kidney, and consequently decreases this diabetic biomarker that predispose to cardiovascular complications. CI - Copyright (c) 2018 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of PBJ-Associacao Porto Biomedical/Porto Biomedical Society. All rights reserved. FAU - Luis, Carla AU - Luis C AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. FAU - Costa, Raquel AU - Costa R AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. FAU - Rodrigues, Ilda AU - Rodrigues I AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. FAU - Castela, Angela AU - Castela A AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. FAU - Coelho, Pedro AU - Coelho P AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. AD - ESTSP-Escola Superior de Tecnologia da Saude do Porto. FAU - Guerreiro, Susana AU - Guerreiro S AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. FAU - Gomes, Joana AU - Gomes J AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. AD - IPATIMUP-Institute of Molecular Pathology and Immunology, University of Porto. FAU - Reis, Celso AU - Reis C AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. AD - IPATIMUP-Institute of Molecular Pathology and Immunology, University of Porto. AD - Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal. FAU - Soares, Raquel AU - Soares R AD - Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine. AD - i3S, Instituto de Investigacao e Inovacao em Saude, University of Porto. LA - eng PT - Journal Article DEP - 20180808 PL - United States TA - Porto Biomed J JT - Porto biomedical journal JID - 101707479 PMC - PMC6750249 OTO - NOTNLM OT - 3-nitrotyrosine OT - advanced glycation end products OT - diet polyphenols OT - microvascular endothelial cells OT - oxidative stress biomarker COIS- Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.The authors report no conflicts of interest. EDAT- 2018/08/08 00:00 MHDA- 2018/08/08 00:01 PMCR- 2018/08/08 CRDT- 2019/10/10 06:00 PHST- 2018/05/15 00:00 [received] PHST- 2018/07/11 00:00 [accepted] PHST- 2019/10/10 06:00 [entrez] PHST- 2018/08/08 00:00 [pubmed] PHST- 2018/08/08 00:01 [medline] PHST- 2018/08/08 00:00 [pmc-release] AID - PBJ-D-18-00030 [pii] AID - 10.1016/j.pbj.0000000000000023 [doi] PST - epublish SO - Porto Biomed J. 2018 Aug 8;4(1):e23. doi: 10.1016/j.pbj.0000000000000023. eCollection 2019 Jan-Feb.