We present the inhibitory properties of the Solanum nigrescens anthocyanin fraction (SNAF) and its major constituents on alpha-glucosidase (AG), pancreatic lipase (PL), HMG-CoA reductase, and ornithine decarboxylase (ODC). The effect of SNAF was simultaneously evaluated in ICR male mice exposed to triglyceride charge test (TCT). HPLC-MS profiling revealed the presence cyanidin-3-O-rutinoside-5-glucoside (CRG), delphinidin-3-(p-coumaroyl)-rutinoside-5-glucoside (DCRG), and petunidin-3-(cis-p-coumaroyl)-rutinoside-5-glucoside (PCRG) as major constituents of the fraction. SNAF, CRG, and specially PCRG, induced strong non-competitive inhibition on PL (IC50 , 33-86 μg mL-1 ). The results of TCT confirmed their capacity to ameliorate (p <0.001) hypertriglyceridemia during postprandial and interdigestive stages. SNAF, CRG, DCRG, and PCRG caused negligible growth inhibition (MIC>600 μg mL-1 ) on beneficial bacteria whereas SNAF and DCRG exerted inhibitory activity on Helicobacter pylori ATCC 53504 (MIC,187-64 μg mL-1 ). Additional exploration revealed that SNAF and DCRG produced non-competitive activity on H. pylori urease, which facilitates bacterial growth under acidic conditions.
Keywords: Anthocyanins; Anti-Helicobacter pylori; Anti-hypertriglyceridemic; Solanum nigrescens; nutraceuticals.
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