Cutaneous pigmentation plays critical role in determining the color of skin along with photo protection of skin from dreadful effects of ultraviolet radiations. Conversely, abnormal accumulation of melanin is responsible for hyper pigmentary disorders such as melasma, senile lentigines and freckles. Because of the visible nature of dermatologic diseases, they have a considerable psychosomatic effect on affected patients. Tyrosinase inhibitors are molecules that interrelate in some way with the enzyme to prevent it from working in the normal manner. Past many decades witnessed the quest for the development of natural tyrosinase inhibitors due to imperative role played by tyrosinase in the process of melanogenesis and fungi or fruit enzymatic browning. Mechanism of pigmentation is characterized by the intact process of the synthesis of specialized black pigment within melanosomes. Melanin is synthesized by a cascade of enzymatic and chemical reactions. For this reason, melanin production is mainly controlled by the expression and activation of tyrosinase. In the current article, we discussed tyrosinase inhibitors from the natural sources, which can be an essential constituent of cosmetics products and depigmenting agents for the treatment of hyperpigmentory disorders.
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http://dx.doi.org/10.2174/1389557519666190116101039 | DOI Listing |
Pharmacol Res Perspect
February 2025
Department of Pharmacology and Toxicology, Faculty of Veterinary, Ankara University, Ankara, Turkey.
In this study, the structure of a new boron compound obtained using 3-methoxy catechol and 4-methoxy phenyl boronic acid was characterized by H, C NMR, LC-MS-IT-TOF, UV-Vis and FTIR spectroscopy. The antioxidant activities of the newly synthesized compound were evaluated by DPPH free radical scavenging, ABTS quation radical scavenging and CUPRAC copper reducing capacity methods. Anticholinesterase activities were determined by acetylcholinesterase and butyrylcholinesterase enzyme inhibitor assays.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
Tyrosinase is a key enzyme responsible for the formation of melanin (a natural skin pigment with ultraviolet-protection properties). However, some people experience melanin overproduction, so new, safe, and biocompatible enzyme inhibitors are sought. New tripeptide tyrosinase inhibitors were developed using molecular modeling.
View Article and Find Full Text PDFAntioxidants (Basel)
December 2024
Hainan Key Laboratory of Research and Development of Natural Product from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
Miq. is an important undergrowth species in southern China. The fruits of are recognized as one of "the four famous south medicines" and are also used in the production of preserved fruit.
View Article and Find Full Text PDFCurr Pharm Des
January 2025
Institute of Materials Research, Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China.
Introduction: An efficient and four-component one-pot facile synthesis of tetra-substituted imidazole is achieved by cyclo-condensation reaction of benzil with subsequent successive substitution of aromatic aldehydes, ester substituted amine and ammonium acetate via refluxing the mixture for almost two hours at 140°C.
Method: The ending point of the understudy reaction was examined by TLC after regular intervals. Synthesized 1,2,4-tetrasubstituted imidazoles were characterized by physical data and the structural features were analyzed using spectroscopic techniques such as FTIR, NMR and elemental analysis.
Chem Biol Drug Des
January 2025
Department of Biology, Faculty of Science, Selcuk University, Konya, Turkey.
Oxadiazole compounds are of great interest because they have a range of biological activities ranging from antioxidants to anticancer agents. Against this background, we wanted to demonstrate the antioxidant, enzyme inhibitory, and anticancer effects of 5(4-hydroxyphenyl)-2-(N-phenylamino)-1,3,4-oxadiazole (Hppo). Antioxidant abilities were measured through free radical scavenging and reducing power tests.
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