ABSTRACT. Ti(III) and (IV) hydrazide complexes were synthesized, characterized, screened for their tyrosinase lipoxygenase inhibitory cytotoxic activities. The geometry of is tentatively assigned as octahedral. Magnetic moments found around 1.7 B.M. electronic spectral transition in the range 495-518 nm. Evaluation Ti(IV) activities revealed varying inhibition potential. Hydrazide ligands inact...

PURPOSE The aim of this study was to investigate acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and antityrosinase activities of extracts from ten Piper species namely; P. caninum, P. lanatum, P. abbreviatum, P. aborescens, P. porphyrophyllum, P. erecticaule, P. ribesioides, P. miniatum, P. stylosum, and P. majusculum. METHODS Anticholinesterase and antityrosinase activities were e...

Diacylglycerol (DAG) increases the melanin content of human melanocytes in vitro and increases the pigmentation of guinea pig skin in vivo, but the mechanism(s) underlying those effects remain unknown. In this study, we characterized the role of diacylglycerol kinase (DGK), which phosphorylates DAG to generate phosphatidic acid, in the regulation of pigmentation. Ten isoforms of DGK have been i...

Previously, it was reported that some prenylated flavonoids contained in the dichloromethane fraction of the ethanolic extract of Sophora flavescens, such as kuraridin, sophoraflavanone G, kurarinone, and kushenol F, are tyrosinase inhibitors; however, based on the level of these inhibitors in the extract, its inhibitory effect on tyrosinase activity was higher than expected. This has led us to...

Problem statement: In the current scenario, photo-aging is a major problem causing skin wrinkling and hyperpigmentation. Therefore, elastase and tyrosinase inhibitors play an important role in the treatment of skin aging and thus, gaining a special attention in cosmetic industries. Approach: In the screening of Korean medicinal plants to search the potent elastase and tyrosinase inhibitors, the...

background tyrosinase is a copper-containing enzyme, which is widely distributed in microorganisms, animals and plants. it is also a key enzyme in melanin biosynthesis, which plays a crucial role in determining the color of mammalian skin and hair. in addition, unfavorable enzymatic browning of plant-derived foods by tyrosinase causes a decrease in nutritional quality and economic loss of food ...

27 For screening of skin-whitening ingredients that modulate inhibition of melanogenesis, 28 tyrosinase promoter-based assay using a 3D spheroid culture technique is a beneficial tool to 29 improve the accuracy of raw material screening in cosmetics through mimicking of the in 30 vivo microenvironment. Although the advantages of high-throughput screening (HTS) are 31 widely known, there has bee...

Tyrosinase is an enzyme of industrial interest. The production and characterization of tyrosinase from P. sanguineus CCT-4518 were investigated. The selection of inductors, luminosity influence, inoculum size and type of culture medium on the production of tyrosinase and the effect of inhibitors on enzyme activity were performed. Optimum conditions for intracellular tyrosinase production was ob...