Underutilized Canadian wild berries as potential sources of lipophilic bioactive compounds with antihypertensive properties.

ABSTRACT

Traditional berries are small fruits and are widely distributed in the Canadian prairies. The current study investigates the lipophilic bioactive compounds such as fatty acids, phytosterols, and terpenes, and their bioactivities, such as lipid peroxidation, as well as the antihypertensive activities of fourteen underutilized Canadian wild berries. These berries include Saskatoon berries (Amelanchier alnifolia), gooseberries (Ribes hirtellum), wild grapes (Vitis riparia), blackcurrants (Ribes nigrum), redcurrants (Ribes rubrum), haskap berries (Lonicera caerulea), wild raspberries (Rubus idaeus), wild blueberries (Vaccinium angustifolium), chokeberries (Aronia melanocarpa), buckthorn (Rhamnus cathartica), highbush cranberries (Viburnum trilobum), chokecherries (Prunus virginiana), nannyberries (Viburnum lentago) and snowberries (Symphoricarpos albus). The fatty acids, phytosterols, and terpenes were identified using Gas Chromatography-Mass Spectrometry (GC-MS). Lipid peroxidation and the antihypertensive activity assessed by measuring the berries' angiotensin converting enzyme 1 (ACE1) inhibitory activity were determined using in vitro methods. Notably, wild grapes exhibited the highest (p < 0.05) total fat content (7659 ± 312 µg per g DW), followed by haskap berries (4650 ± 184 µg per g DW). Polyunsaturated fatty acids (PUFAs) were highest (p < 0.05) in wild grapes (74%). Predominant phytosterols and terpenes identified in Canadian wild berries included ß-sitosterol, isofucosterol, phytol, and α-amyrin. Saskatoon berries and gooseberries showed a distinct phytosterol and terpene profile compared to the other wild berries. Snowberries demonstrated the highest (p < 0.05) lipid peroxidation and the lowest (p < 0.05) angiotensin converting enzyme (ACE1) activity. This research provides valuable insights into the lipophilic bioactive compounds and their potential activities in vitro of the Canadian wild berries, offering a foundation for further exploration and potential applications in the context of nutraceuticals and functional foods.