Yang Hao, Yang Tingxiang, Qi Lerong, Zhang Yu, Xia Yihan, Wang Zhen, Wang Dong Hao
School of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
School of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
Food Chem. 2025 Jan 15;463(Pt 2):141287. doi: 10.1016/j.foodchem.2024.141287. Epub 2024 Sep 13.
Non-traditional seafood, such as spoon worms (Urechis unicinctus) and peanut worms (Sipunculus nudus), serves as both delicacies and potential solutions to the global food insecurity crisis. Despite being consumed primarily in parts of China, Korea, and Japan, the nutritional values especially the complex fatty acid compositions of these marine worms are difficult to characterize. To overcome this obstacle, we employed covalent adduct chemical ionization (CACI) tandem mass spectrometry for the de novo identification of their unusual polyunsaturated fatty acids (PUFA). Through this method, we identified several PUFA with polymethylene-interrupted (PMI) double bond configurations, including 22:3(7Z,13Z,16Z), a novel PUFA derived from sciadonic acid. U. unicinctus exhibits an exceptionally low n-6/n-3 PUFA ratio of 0.15, making it a potential functional food to counterbalance the n-6/n-3 imbalance in modern diets. S. nudus boasts notably high concentrations (∼3 %, wt/wt) of branched chain fatty acids (BCFA), exceeding typical levels found in dairy products.
非传统海鲜，如星虫（单环刺螠）和方格星虫，既是美味佳肴，也是解决全球粮食安全危机的潜在方案。尽管这些海洋蠕虫主要在中国、韩国和日本的部分地区被食用，但其营养价值，尤其是复杂的脂肪酸组成却难以确定。为了克服这一障碍，我们采用共价加合物化学电离（CACI）串联质谱法从头鉴定其异常的多不饱和脂肪酸（PUFA）。通过这种方法，我们鉴定出了几种具有亚甲基间断（PMI）双键构型的多不饱和脂肪酸，包括22:3(7Z,13Z,16Z)，一种源自顺桐油酸的新型多不饱和脂肪酸。单环刺螠的n-6/n-3多不饱和脂肪酸比例极低，仅为0.15，使其成为一种潜在的功能性食品，可平衡现代饮食中n-6/n-3的失衡。方格星虫含有显著高浓度（约3%，重量/重量）的支链脂肪酸（BCFA），超过了乳制品中的典型水平。
