title: Cyanidin-3-glucoside and its phenolic acid metabolites attenuate visible light-induced retinal degeneration in vivo via activation of Nrf2/HO-1 pathway and NF-κB suppression.
abstract: Cyanidin-3-glucoside (C3G) is a major anthocyanin in berries and a potential nutritional supplement for preventing retinal degeneration. However, the protective mechanism of C3G and its metabolites, protocatechuic acid (PCA) and ferulic acid (FA), remain unclear. The molecular mechanisms of C3G and its metabolites against retinal photooxidative damage in vivo are investigated.
  
  
  
  Pigmented rabbits were orally administered C3G, PCA, and FA (0.11 mmol/kg/day) for 3 weeks. Electroretinography, histological analysis, and TUNEL assay showed that C3G and its metabolites attenuated retinal cell apoptosis. The expression of oxidative stress markers were upregulated after light exposure but attenuated by C3G and FA, which may be attributed to the elevated secretion and expression of heme oxygenase (HO-1) and nuclear factor erythroid-2 related factor 2 (Nrf2). C3G, PCA, and FA attenuated the secretion or expression of inflammation-related genes; FA suppressed nuclear factor kappa B (NF-κB) activation. The treatments attenuated the light-induced changes on certain apoptotic proteins and angiogenesis-related cytokines.
  
  
  
  C3G and FA reduced light-induced retinal oxidative stress by activating the Nrf2/HO-1 antioxidant pathway. FA attenuated the light-induced retinal inflammation by suppressing NF-κB activation. C3G and its metabolites attenuated the photooxidation-induced apoptosis and angiogenesis in the retina.
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Yazhen
authors.initials: Y
authors.lastname: Huo
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Lu
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Ou
authors.initials: O
authors.lastname: Wang
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Xue
authors.initials: X
authors.lastname: Yang
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Baoping
authors.initials: B
authors.lastname: Ji
authors.affiliation: Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000447:Aldehydes / Q000378:metabolism; D000818:Animals; D000872:Anthocyanins / Q000494:pharmacology*; D000975:Antioxidants / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects / Q000528:radiation effects; D003373:Coumaric Acids / Q000494:pharmacology; D016207:Cytokines / Q000235:genetics / Q000378:metabolism; D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000378:metabolism; D005960:Glucosides / Q000494:pharmacology*; D051547:Heme Oxygenase-1 / Q000235:genetics / Q000378:metabolism*; D062385:Hydroxybenzoates / Q000494:pharmacology*; D020287:In Situ Nick-End Labeling; D008027:Light / Q000009:adverse effects*; D051267:NF-E2-Related Factor 2 / Q000235:genetics / Q000378:metabolism*; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D011817:Rabbits; D012160:Retina / Q000187:drug effects / Q000528:radiation effects; D012162:Retinal Degeneration / Q000188:drug therapy* / Q000209:etiology; D015398:Signal Transduction; D014443:Tyrosine / Q000031:analogs & derivatives / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D000447:Aldehydes; D000872:Anthocyanins; D000975:Antioxidants; D003373:Coumaric Acids; D016207:Cytokines; D005960:Glucosides; D062385:Hydroxybenzoates; D051267:NF-E2-Related Factor 2; D016328:NF-kappa B; C462279:cyanidin-3-O-beta-glucopyranoside; C002744:3-nitrotyrosine; C009091:protocatechuic acid; D014443:Tyrosine; D000080242:8-Hydroxy-2'-Deoxyguanosine; C004999:ferulic acid; D051547:Heme Oxygenase-1; D003849:Deoxyguanosine; C017616:phenolic acid; C027576:4-hydroxy-2-nonenal
keywords: Cyanidin-3-glucoside; Inflammation; Oxidative stress; Phenolic acid metabolites; Retinoprotection