Fatty Acids Profile, Atherogenic (IA) and Thrombogenic (IT) Health Lipid Indices, of Raw Roe of Blue Fin Tuna (<i>Thunnus</i><i>thynnus</i>L.) and Their Salted Product “Bottarga”

The fatty acids composition and the related health lipid indices (IA, atherogenic and IT thrombogenic) of Blue Fin Tuna’s (Thunnus thynnus L.) raw roe and their cured product bottarga, both considered a delicacy, were studied. The fatty acid (FA) composition of tuna’s roe and bottarga showed a relevant proportion (40.87% and 36.62% respectively) of poly-unsaturated fatty acids (PUFAs) with a prevalence of the n – 3 series, that showed values almost ten folds higher than those of n – 6 fatty acids, in both classes of analyzed samples. The IA and IT indices resulted comparable in tuna’s roe and in the bottarga samples respectively. To the best of our knowledge, this is the first detailed report on the fatty acids composition and the related lipid health indices in tuna’s raw roe and in their cured product “bottarga”.

鮟鱇鱼子低分子质量肽的制备及其抗氧化活性评价

以鮟鱇鱼(Lophius litulon)子为原料,利用复合酶解法制备低分子质量肽并对其抗氧化活性进行评价。利用胃蛋白酶和胰蛋白酶对鮟鱇鱼子进行酶解,超滤后得到分子质量小于1 kDa的鮟鱇鱼子肽(MRP),并对其在体外的自由基(DPPH、ABTS及·OH)清除能力进行测定。此外,通过测定细胞活性、MDA、SOD、MDA和GSH-Px水平,研究其对H_(2)O_(2)诱导的RAW 264.7细胞损伤的保护作用。结果表明,MRP对DPPH、ABTS和·OH具有良好的清除作用,且能保护H2O2对RAW 264.7细胞的氧化损伤,可提高细胞活性及细胞中CAT、SOD、GSH-Px的活力,下调MDA的含量水平。结果表明,MRP具有较好的抗氧化能力,可作为添加剂用于抗氧化相关产品研发。