Stability and ultraviolet A photostability of silymarin polyphenols and its consequences for practical use in dermatology

0557085 - MBÚ 2023 RIV CH eng J - Článek v odborném periodiku
Kosina, P. - Ryšavá, A. - Vostálová, J. - Papoušková, B. - Biedermann, David - Ulrichová, J. - Svobodová, A.
Stability and ultraviolet A photostability of silymarin polyphenols and its consequences for practical use in dermatology.
Journal of Photochemistry and Photobiology A-Chemistry. Roč. 429, 1 August (2022), č. článku 113897. ISSN 1010-6030. E-ISSN 1873-2666
Institucionální podpora: RVO:61388971
Klíčová slova: milk thistle * quercetin * oxidation * flavonoids * mechanisms * silybin * Silybum marianum * Flavonolignan * Flavonoid * Stability * Photostability * Photodecomposition products
Obor OECD: Dermatology and venereal diseases
Impakt faktor: 4.3, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S1010603022001265?via%3Dihub

Silymarin (SM), a complex mixture of polyphenols, flavonolignans and flavonoids, isolated from milk thistle seeds (Silybum marianum L. Gaertn., Asteraceae), is widely accepted as a phytomedicine for the treatment of numerous diseases of various etiology. Thanks to its manifold biological properties, i.e. anti-oxidant, anti-inflammatory, immunomodulatory, and regenerative attributes, SM is of interest for dermatological applications. The stability of SM components for dermal use in aqueous environments of varying pH, as well as their photostability after UVA irradiation, were studied here using UV/VIS spectroscopy and HPLC-MS. Isosilybin, silychristin and silydianin were found to be stable and UVA photostable. Silybin and mainly taxifolin were unstable in aqueous solutions but both were UVA photostable. Quercetin and 2,3-dehydrosilybin were unstable and dose dependent UVA-induced degradation was also found. The main UVA-induced degradation product of 2,3-dehydrosilybin (C24H19O10, m/z 467.0978) in aqueous solutions was detected by UHPLC-HRMS analysis and MSE spectra. The main UVA photodegradation product of 2,3-dehydrosilybin has a similar structural motif to the minor quercetin photoproduct (C14H9O7, m/z 289.0348), newly identified in this study.
Trvalý link: http://hdl.handle.net/11104/0331254