Friday, 21 December 2018

2010 Alaskan Wild Berry Resources and Human Health under the Cloud of Climate Change†

Joshua Kellogg§, Jinzhi Wang§, Courtney Flint§, David Ribnicky#, Peter Kuhn#, Elvira González De Mejia⊥, Ilya Raskin# and Mary Ann Lila*§⊗ § Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, Illinois 61801 # Biotech Center, SEBS, Rutgers University, New Brunswick, New Jersey 08901 ⊥ Department of Food Science and Human Nutrition, University of Illinois, Urbana, Illinois 61801 ⊗ Department of Food, Bioprocessing, and Nutrition Sciences, Plants for Human Health Institute, North Carolina State University, Kannapolis, North Carolina 28081 J. Agric. Food Chem., 2010, 58 (7), pp 3884–3900 DOI: 10.1021/jf902693r Publication Date (Web): December 21, 2009 Copyright © 2009 American Chemical Society *Corresponding author [telephone (704) 250-5407; fax (704) 250-5409; e-mail]. Cite this:J. Agric. Food Chem. 2010, 58, 7, 3884-3900 Abstract Wild berries are integral dietary components for Alaska Native people and a rich source of polyphenolic metabolites that can ameliorate metabolic disorders such as obesity and diabetes. In this study, five species of wild Alaskan berries (Vaccinium ovalifolium, Vaccinium uliginosum, Rubus chamaemorus, Rubus spectabilis, and Empetrum nigrum) were screened for bioactivity through a community-participatory research method involving three geographically distinct tribal communities. Compositional analysis by HPLC and LC-MS2 revealed substantial site-specific variation in anthocyanins (0.01−4.39 mg/g of FW) and proanthocyanidins (0.74−6.25 mg/g of FW) and identified A-type proanthocyanidin polymers. R. spectabilis increased expression levels of preadipocyte factor 1 (182%), and proanthocyanidin-enriched fractions from other species reduced lipid accumulation in 3T3-L1 adipocytes. Selected extracts reduced serum glucose levels in C57BL/6J mice by up to 45%. Local observations provided robust insights into effects of climatic fluctuations on berry abundance and quality, and preliminary site-specific compositional and bioactivity differences were noted, suggesting the need to monitor this Alaska Native resource as climate shifts affect the region. Keywords (keywords): adipocytes; Anthocyanins; diabetes; Empetrum nigrum; metabolic syndrome; obesity; pref-1; proanthocyanidins; Rubus chamaemorus; Rubus spectabilis; traditional ecological knowledge; Vaccinium ovalifolium; Vaccinium uliginosum