Caffeine metabolites not caffeine protect against riboflavin photosensitized oxidative damage related to skin and eye health

Autor: Willy G. Santos, Regina S. Scurachio, Leif H. Skibsted, Daniel R. Cardoso, F. Mattiucci

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Caffeine metabolites were found to bind riboflavin with dissociation constant in the millimolar region by an exothermic process with positive entropy of reaction, which was found by (1)H NMR and fluorescence spectroscopy to occur predominantly by hyd

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7811e58bf709464d43fe161f4a35cafc
https://doi.org/10.1016/j.jphotobiol.2016.08.042

Photooxidation of Other B-Vitamins as Sensitized by Riboflavin

Autor: Leif H. Skibsted, Regina S. Scurachio, Leandro de Oliveira Rodrigues Arrivetti, Daniel R. Cardoso, Thiago Bueno Ruiz Papa, Willy G. Santos

Publikováno v: Journal of Agricultural and Food Chemistry. 61:7615-7620

Pyridoxal phosphate (PLP) was found to deactivate triplet-excited riboflavin (Rib) in aqueous solution with a deactivation constant of 3.0 ± 0.1 × 10(8) L mol(-1) s(-1) at 25 °C. Likewise, PLP was found to quench the fluorescence emission of (1)Ri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b6c1eccef137aa9cbe3e0d210beb073
https://doi.org/10.1021/jf402123d

Isomerization of Cholecalciferol through Energy Transfer as a Protective Mechanism Against Flavin-Sensitized Photooxidation

Autor: Regina S. Scurachio, Eduardo Sanches Pereira do Nascimento, Daniel R. Cardoso, Willy G. Santos, Leif H. Skibsted

Publikováno v: Journal of agricultural and food chemistry. 63(18)

Cholecalciferol, vitamin D3, was found to isomerize to 5,6-trans-vitamin-D3 with a quantum yield of 0.15 ± 0.01 in air-saturated 7/3 tert-butyl alcohol/water (v/v) at 25 °C, increasing to 0.32 ± 0.02 in the absence of oxygen, through quenching of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94407c8d4cd94d776bbe41e520601e0d
https://pubmed.ncbi.nlm.nih.gov/25891983