Tyrosinase is a crucial copper-containing enzyme involved in the production of melanin. Melasma, age spots, and freckles are examples of hyperpigmentation diseases caused by excess production of melanin. Inhibiting tyrosinase activity is a crucial method for treating these disorders along with various applications such as cosmetics, food technology, and medicine. Natural products have proven a rich source of tyrosinase inhibitors, with several molecules from plant, marine, and microbial sources showing potential inhibitory action. This chapter provides a complete overview of natural compounds that have been found as tyrosinase inhibitors, with emphasis on their structures, modes of action, and prospective applications.
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http://dx.doi.org/10.1016/bs.enz.2024.06.002 | DOI Listing |
J Biomol Struct Dyn
March 2025
College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, PR China.
Screening and developing tyrosinase inhibitors with novel structures are notable to receive attention in the field of skin pigmentation research due to their application in hyperpigmentation control. Hydroxyacetophenone is a natural antioxidant found in the (Norwegian spruce) needles and is widely used in the cosmetic industry as an antioxidant ingredient. In this study, integrations of virtual molecular dynamics (MD) simulations and biochemical inhibition kinetics were conducted to validate the inhibitory function of hydroxyacetophenone on tyrosinase.
View Article and Find Full Text PDFJ Food Sci
March 2025
College of Food Science and Engineering & Institute of Special Oilseed Processing and Technology, Henan University of Technology, Zhengzhou, China.
In this study, free, soluble bound (glycosylated, esterified), and insoluble-bound phenolic compounds from safflower seeds were identified and quantified by UPLC-MS/MS. The four phenolic fractions were assessed for their antioxidant capacity and inhibition of α-amylase and tyrosinase. In four phenolic fractions, 55 phenolic compounds, mainly flavonoids (19) and phenolic acids (16), were identified.
View Article and Find Full Text PDFMar Biotechnol (NY)
March 2025
School of Pharmaceutical Sciences, Changchun University of Chinese Medicine, Changchun, 130117, Jilin, China.
This article aims to reveal the optimal peptide segment with antioxidant activity from Dalian Stichopus japonicus, investigate its anti-melanogenesis effect, and elucidate its mechanisms of action both in vitro and in vivo. The best antioxidant alcalase hydrolysates, identified by the previous screening of proteases, was isolated by ultrafiltration; it was found that the components with a molecular weight of ≤ 3 kDa exhibited the best activity. The chemical components were characterized using LC-MS/MS.
View Article and Find Full Text PDFAm J Dermatopathol
February 2025
Department of Anatomical Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX.
B-Raf Proto-Oncogene (BRAF) fusions are rare in melanomas. We present a case of cutaneous melanoma with a Ring Finger Protein 11 (RNF11)::BRAF fusion in a 63-year-old man with a history of stage IB melanoma on the right upper back (pT2apN0cM0; nonulcerated with a Breslow thickness of 1.2 mm).
View Article and Find Full Text PDFHeliyon
February 2025
Grupo de Investigación en Ingeniería Agrícola. Escuela de Biociencias. Universidad Nacional de Colombia, AA 3840, Medellín, Colombia.
Antioxidant components of avocado seed can be used to prevent browning caused by polyphenol oxidase (PPO). This research evaluated the inhibitory effect of avocado seed extract obtained through solid state fermentation on PPO and assessed the anti-browning performance of this extract on avocado, banana, and apple pulp in comparison to ascorbic acid and L-Cysteine. The Km and Vmax kinetic parameters of avocado PPO, using catechol as substrate, were 0.
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