A Tyrosinase Inhibitor from a Nitrogen-Enriched Chemically Engineered Extract.

Area of Science:

• Biochemistry
• Natural Product Chemistry
• Enzymology

Background:

• Tyrosinase enzyme is crucial for melanin synthesis and enzymatic browning in food.
• Tyrosinase inhibitors are valuable for treating hyperpigmentary disorders and preventing food spoilage.
• Hydrazine monohydrate can create semisynthetic compounds with a rare N-N linkage, potentially enhancing tyrosinase inhibition.

Purpose of the Study:

• To screen chemically engineered extracts for tyrosinase inhibition.
• To discover novel tyrosinase inhibitors from natural sources using chemical modification.
• To explore the potential of semisynthetic compounds derived from chamomile.

Main Methods:

• Chemical engineering of plant extracts using hydrazine monohydrate.
• Liquid chromatography-mass spectrometry (LC-MS) for compositional analysis.
• Bioguided fractionation to isolate active compounds.
• Enzyme inhibition assays to determine IC50 values.

Main Results:

• A series of chemically engineered extracts were screened for tyrosinase inhibitory activity.
• The most active extract, derived from Matricaria recutita L., yielded a potent inhibitor.
• A novel pyrazole compound was isolated, exhibiting tyrosinase inhibition with an IC50 of 28.20 ± 1.13 μM.
• The pyrazole was synthesized via a one-pot reaction involving selective dehydroxylation.

Conclusions:

• Semisynthetic modification of natural products can yield potent tyrosinase inhibitors.
• A novel pyrazole from chamomile demonstrates significant potential as a tyrosinase inhibitor.
• This compound has dual applications in cosmetic and food industries.