Honey Flavonoid Shows Anti-Microbial, Anti-Diabetic, Anti-Obesity, Anti-Tumor, Anti-Inflammatory Activity

Two Approaches for Evaluating the Effects of Galangin on the Activities and mRNA Expression of Seven CYP450

Molecules 2019, 24(6), 1171

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Galangin is a marker compound of honey and Alpinia officinarum Hance that exhibits great potential for anti-microbial, anti-diabetic, anti-obesity, anti-tumour and anti-inflammatory applications.

Galangin is frequently consumed in combination with common clinical drugs. Here, we evaluated the effects of galangin on cytochrome P450 (CYP)-mediated metabolism, using two different approaches, to predict drug–drug interactions. Male Sprague Dawley rats were administered galangin daily for 8 weeks. A “cocktail-probes” approach was employed to evaluate the activities of different CYP450 enzymes.

Blood samples of seven probe drugs were analysed using liquid chromatography-tandem mass spectrometry in positive and negative electrospray-ionisation modes. Pharmacokinetic parameters were calculated to identify statistical differences. CYP mRNA-expression levels were investigated in real-time quantitative polymerase chain reaction experiments. The galangin-treated group showed significantly decreased AUC0–∞ and Cmax values for CYP1A2, and CYP2B3. The galangin-treated group showed significantly increased AUC0–∞ and Cmax values for CYP2C13 and CYP3A1. No significant influences were observed in the pharmacokinetic profiles of CYP2C11, CYP2D4 and CYP2E1. The mRNA-expression results were consistent with the pharmacokinetic results.

Thus, CYP450 enzyme activities may be altered by long-term galangin administration, suggesting galangin to be a promising candidate molecule for enhancing oral drug bioavailability and chemoprevention and reversing multidrug resistance.