Bioactivity-guided purification and characterization of antioxidant, anti-gout and anti-diabetic polyphenols from Panchkuta: a traditional food combination of (semi) arid regions

Abstract

Desert ecosystems have thrived in part because of the contribution of local traditions, along with conventional knowledge passed down through generations. Panchkuta, a combination of five plants, including Prosopis cineraria, Cordia dichotoma, Capparis decidua, Acacia senegal, and Mangifera indica, is a classic example of ethnic desert food and how communities utilize existing food resources to ensure nutritional security. In this study, we determined the total phenolic content, total flavonoid content, antioxidant, anti-gout, and anti-diabetic activities of crude and purified (using Amberlite XAD7HP and Sephadex LH-20) fractions of Panchkuta. Further, the phenolic compounds (quercetin, tiliroside, myricetin-3-O-galactoside, and others) responsible for these activities were identified by analytical techniques, including TLC, LC-MS, and HR-MS. The purified fraction showing maximum antioxidant activity in DPPH assay (Fraction 16, IC50–156.65 ± 12.6 μg/ml) was validated for its cytoprotective and anti-lipid peroxidative effects in the in vitro cell culture system (murine fibroblast cells). Fraction 9 showed the maximum anti-gout activity in xanthine oxidase assay (IC50- 80.59 ± 9.89 μg/ml) and fraction 11 showed the maximum anti-diabetic activity in α-amylase assay (IC50 of 101.54 ± 14.7 μg/ml). The study reinforces the understanding of traditional knowledge, relevance to One Health, and authenticates the potential medicinal value of Panchkuta through scientific validation.