Results 31 to 40 of about 677,076 (187)

Comparison of Various Solvent Extracts and Major Bioactive Components from Portulaca oleracea for Antioxidant, Anti-Tyrosinase, and Anti-α-Glucosidase Activities

open access: yesAntioxidants, 2022
Portulaca oleracea is a well-known species for traditional medicine and food homology in Taiwan. In traditional medicine, P. oleracea is also used to treat gastrointestinal disorders, liver inflammation, fever, severe inflammation, and headaches.
Wei-Cheng Chen   +7 more
doaj   +1 more source

Thiopurine Drugs Repositioned as Tyrosinase Inhibitors

open access: yes, 2017
In this study, we repositioned thiopurine drugs used for the treatment of acute leukaemia as new tyrosinase inhibitors. Tyrosinase catalyses two distinct and successive oxidations in melanin biosynthesis: the conversions of tyrosine to ...
Joonhyuck Choi, You-Mie Lee, Jun-Goo Jee
core   +2 more sources

Resorcinol-based hemiindigoid derivatives as human tyrosinase inhibitors and melanogenesis suppressors in human melanoma cells [PDF]

open access: yes, 2022
Human tyrosinase (hsTYR) catalyzes the key steps of melanogenesis, making it a privileged target for reducing melanin production in vivo. However, very few hsTYR inhibitors have been reported so far in the literature, whereas thousands of mushroom ...
Guy, Royal   +8 more
core   +2 more sources

Benzylidene-6-hydroxy-3,4-dihydronaphthalenone chalconoids as potent tyrosinase inhibitors

open access: yesResearch in Pharmaceutical Sciences, 2021
Background and purpose: Tyrosinase enzyme has a key role in melanin biosynthesis by converting tyrosine into dopaquinone. It also participates in the enzymatic browning of vegetables by polyphenol oxidation. Therefore, tyrosinase inhibitors are useful in
Sara Ranjbar   +5 more
doaj   +1 more source

In Vitro and In Vivo Biological Evaluation of Indole-thiazolidine-2,4-dione Derivatives as Tyrosinase Inhibitors. [PDF]

open access: yesMolecules, 2023
Tyrosinase is an important rate-limiting enzyme in melanin biosynthesis. To find potential tyrosinase inhibitors with anti-melanogenic activity, a series of indole-thiazolidine-2,4-dione derivatives 5a~5z were synthesized by incorporating indole with ...
Lu L, Hu C, Min X, Liu Z, Xu X, Gan L.
europepmc   +2 more sources

Novel heterocyclic hybrid of 2-(aryl)-1H-indene-1,3(2H)-dione targeting tyrosinase: design, biological evaluation and in silico studies [PDF]

open access: yesTrends in Pharmaceutical Sciences, 2020
Melanogenesis is a process of melanin synthesize, which is a primary response for the pigmentation of human skin. Tyrosinase is a key enzyme, which catalyzes a rate-limiting step of the melanin formation, natural products have shown potent inhibitors ...
Aida Iraji   +7 more
doaj   +1 more source

Discovery of Tyrosinase Inhibitors: Structure-Based Virtual Screening and Biological Evaluation

open access: yesPharmaceutical Fronts, 2022
Tyrosinase (EC 1.14.18.1) plays an indispensable role in the rate-limiting steps of melanin biosynthesis, and its uncontrolled activity may result in various diseases, such as albinism, melanoma, freckles, etc.
Guan Wang   +6 more
doaj   +1 more source

The Hypopigmentation Mechanism of Tyrosinase Inhibitory Peptides Derived from Food Proteins: An Overview

open access: yesMolecules, 2022
Skin hyperpigmentation resulting from excessive tyrosinase expression has long been a problem for beauty lovers, which has not yet been completely solved.
Yuqiong Song   +4 more
doaj   +1 more source

Catalysis-based specific detection and inhibition of tyrosinase and their application

open access: yesJournal of Pharmaceutical Analysis, 2020
Tyrosinase is an important enzyme in controlling the formation of melanin in melanosome, and plays a key role in the pigmentation of hair and skin. The abnormal expression or activation of tyrosinase is associated with several diseases such as albinism ...
Yunwei Qu   +9 more
doaj   +1 more source

Site‐Specific Protein Bioconjugation Through Cellular Incorporation of Noncanonical Amino Acids

open access: yesAngewandte Chemie, EarlyView.
Genetic code expansion (GCE) enables site‐specific installation of noncanonical amino acids containing bioorthogonal conjugation handles, allowing precise, homogeneous protein modification. This review examines the principles of orthogonal translation, surveys the chemistries available for chemoselective labeling, and highlights emerging multi‐site ...
Rahul Sarkar   +2 more
wiley   +2 more sources

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