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  • Author or Editor: Ross Penhallegon x
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Lingonberries have been shown to contain high antioxidant activity. Fruit from different cultivars of lingonberry (Vacciniumvitis-idaea L) were evaluated for fruit quality, antioxidant activity, anthocyanin and phenolic contents. The fruit soluble solids content (SSC), titratable acids (TA), antioxidant capacity, anthocyanin and phenolic contents varied with cultivars. The SSC ranged from 12.9% to 16.9%, the TA ranged from 0.31% to 0.41% and the ratios of SSC/TA ranged from 35.37 to 51.21. Lingonberries contain potent free radical scavenging activities for DPPH·, ROO·, ·OH and O .- 2 radicals. The oxygen radical absorbance capacity (ORAC) values from acetone extraction of lingonberries ranged from 58.5–223.6 μmol of Trolox equivalents (TE)/g fresh berries. The ED50 values for DPPH-radical scavenging ranged from 5.91–11.77 mg fresh weight. The DPPH-radical scavenging activity correlated with ORAC values with a R 2 of 0.8009. ESR spectrum showed that 50 mg·mL-1 of lingonberry extract decreased ·OH radicals by 83% and O .- 2 radicals by 99%. Cyanidin 3-galactoside was the most dominant anthocyanin and contributed the most antioxidant activity in lingonberries. The antioxidant properties of lingonberries may play an important role in protecting cells against the oxidative damage caused by free radicals.

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The effects of lingonberry (Vaccinium vitis-idaea L.) extracts on activator protein-1 (AP-1), nuclear factor-kappaB (NF-κB), and mitogen-activated protein kinases (MAPKs) were evaluated. Pretreatment of JB6 P+ mouse epidermal cells with lingonberry extracts produced a dose-dependent inhibition of AP-1 and NF-κB induced by either 12-O-tetradecanoylphorbol-13-acetate (TPA) or ultraviolet-B (UVB) light. Lingonberry extracts blocked UVB-induced phosphorylation of MAPK family members ERK1, ERK2, and p38, but not JNK. Lingonberry extracts also prevented TPA-induced phosphorylation of ERK1 and ERK2. Results of soft agar assays indicated that lingonberry extracts suppressed TPA-induced neoplastic transformation of JB6 P+

cells in a dose-dependent manner. Lingonberry extracts also induced the apoptosis of human leukemia HL-60 cells in a dose-independent manner. These results suggest that ERK1 and ERK2 may be inhibited by lingonberries, which results in suppression of AP-1 and neoplastic transformation in JB6 P+ cells and causes cancer cell death by an apoptotic mechanism in human leukemia HL-60 cells.

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Urban horticulture describes economically viable horticultural production activities conducted in a city or suburb. It is a growing segment of horticulture in the United States as well as in developing countries, where the enormous growth of megalopolis is not backed by a simultaneous increase of farmland or agricultural productivity. Today, urban horticulture includes food sovereignty in underprivileged neighborhoods, increased availability of vegetables and fruits in big cities, healthy and diverse diets, improved food safety, low transportation costs, efficient resource use, and the mitigation of environmental impacts of horticultural production such as the emission of greenhouse gases. The workshop “Urban horticulture: From local initiatives to global success stories,” held at the 2018 American Society for Horticultural Science (ASHS) conference in Washington, DC, featured present and historical success stories of urban horticulture from Asia, Africa, Latin America, and the United States.

Open Access