Analyses on multiple factors related to evaluation of antioxidant function of northern berries

2015 Fiscal Year Final Research Report

• Project/Area Number: 25292017
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Horticultural science
• Research Institution: Hokkaido University
• Principal Investigator: SUZUKI Takashi 北海道大学, (連合)農学研究科(研究院), 准教授 (30196836)
• Co-Investigator(Kenkyū-buntansha): UKAI Mitsuko 北海道教育大学, 教育学部, 教授 (20160228) ; OKAZAKI Yukako 藤女子大学, 人間生活学部, 准教授 (30105712)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 小果樹 / 活性酸素種（ROS） / 抗酸化 / ラジカル捕捉活性 / アントシアニン / ポリフェノール / 食餌性肥満ラット

Outline of Final Research Achievements

Recent researches have focused on functions of antioxidants like anthocyanin in berries. In order to clarify yearly variations and species/cultivar differences that will present useful knowledge for nutrition of foods, component of antioxidants and antioxidant activities were examined with several northern berries (Vaccinium, Vitis, Rubus, Lonicera, etc.) including cultivars and wild species originating from Hokkaido, Japan. DPPH assay, ORAC assay and ESR spin trapping were employed for evaluating antioxidant activities against DPPH, ROO and OH radicals, respectively. Then, relationship between content of antioxidants and each antioxidant activity was statistically analyzed. Dynamics of anthocyanin absorption at intestine were examined using rats with or without feeding pigments from black chokeberry (Aronia melanocarpa) and Haskap (Lonicera caerulea). Furthermore, the effects of feeding those pigments on improvement of hyperlipidemia and renal damage in rats were also investigated.

Free Research Field

園芸学