Shaanxi Key Laboratory of Degradable Biomedical Materials, College of Chemical Engineering, Northwest University, Xi'an 710069, PR China.
Shaanxi Key Laboratory of Degradable Biomedical Materials, College of Chemical Engineering, Northwest University, Xi'an 710069, PR China.
Food Chem. 2018 Oct 30;264:411-418. doi: 10.1016/j.foodchem.2018.05.063. Epub 2018 May 15.
In this study, fatty acid compositions, physiochemical properties, and antioxidant activities of eight varieties of kiwifruit seed oil (KSO) in China were comparatively investigated. All varieties of KSO were rich in unsaturated fatty acid (UFA), especially linolenic acid. Different varieties of KSO showed subtle differences in physico-chemical characteristics; e.g., density (0.88-0.091 mg/mL), refractive index (1.4803-1.4823), acid value (3.21-3.99 mg KOH/g oil), iodine value (177.22-202.75 g I/100 g oil), and peroxide value (7.23-14.75 mM/kg oil). Different varieties of KSO demonstrated different radical scavenging capacities for DPPH (IC = 25.7-35.1 mg/mL), HO (IC=0.93-1.26 mg/mL), ORAC (1.26-1.99 mM Trolox/kg), and FRAP (3.30-132.30 mg Trolox/kg). Principal component analysis indicated the variety "Hongyang" to have a higher content of UFA and better antioxidant capacity than other varieties. Furthermore, comet assay verified that KSO can protect mice lymphocytes against oxidative DNA damage. Taken together, our findings provide evidence for the bioactivity of KSO as a potential dietary supplement.
本研究比较了中国 8 个猕猴桃籽油品种（KSO）的脂肪酸组成、理化性质和抗氧化活性。所有 KSO 品种均富含不饱和脂肪酸（UFA），尤其是亚麻酸。不同品种的 KSO 在理化特性上存在细微差异，例如密度（0.88-0.091mg/mL）、折光指数（1.4803-1.4823）、酸值（3.21-3.99mg KOH/g 油）、碘值（177.22-202.75g I/100g 油）和过氧化值（7.23-14.75mM/kg 油）。不同品种的 KSO 对 DPPH（IC=25.7-35.1mg/mL）、HO（IC=0.93-1.26mg/mL）、ORAC（1.26-1.99mM Trolox/kg）和 FRAP（3.30-132.30mg Trolox/kg）的自由基清除能力也不同。主成分分析表明，品种“红阳”的 UFA 含量较高，抗氧化能力优于其他品种。此外，彗星试验证实 KSO 可以保护小鼠淋巴细胞免受氧化 DNA 损伤。综上所述，本研究结果为 KSO 作为一种潜在的膳食补充剂的生物活性提供了证据。
