Biophysics Inst., National Research Council, Via Ugo La Malfa 153, Palermo, 90146, Italy.
Dept. of Agricultural, Food, and Forestry Sciences, Univ. of Palermo, Viale Delle Scienze 11, Ed. 4, Palermo, 90128, Italy.
J Food Sci. 2019 Aug;84(8):2337-2346. doi: 10.1111/1750-3841.14718. Epub 2019 Jul 11.
Unopened flower buds of Capparis spinosa L. (capers), generally used in the Mediterranean area as food flavoring, are known to be a good source of bioactive compounds. The aim of this work was to evaluate the nutraceutical value of salt-fermented capers collected from different areas of Pantelleria Island (Italy), testing their methylglyoxal and glyoxal trapping capacity and antioxidant activity by 2,2-diphenyl-1-picryl hydrazyl (DPPH), [2,2-azinobis(3-ethylben- zothiazoline-6-sulfonic acid)] diammonium salt (ABTS), and oxygen radical absorbance capacity (ORAC) assays. Hydrophilic extracts were also characterized by high-performance liquid chromatography-electrospray ionization/mass spectrometry. Among 24 detected compounds, several flavonol derivatives and glucosinolates were identified. The levels of kaempferol and quercetin derivatives varied considerably among the five accessions considered (6.46 to 267.93 and 22.39 to 367.14 mg kaempferol and quercetin equivalent /g fresh weight, respectively), with kaempferol derivatives more representative than quercetin ones. Person's coefficient indicated a high correlation between total phenolic content and anti-DPPH radical capacity (R = 0.665), as well as between total flavonoid content and antioxidant capacity (by ORAC assay; R = 0.888) and between total flavonoid content and glyoxal and methylglyoxal trapping capacity (R = 0.918). Results indicate that capers from Pantelleria Island represent a rich source of bioactive compounds with potential nutraceutical relevance. PRACTICAL APPLICATION: The findings of this study highlight the health benefits of Pantelleria capers consumption due to their composition in antioxidants and their biological properties (antiradical and alpha-dicarbonyls trapping) correlated with the development of a high number of chronic-degenerative diseases. These results are also important for the agricultural and commercial sectors involved in the production of capers from Pantelleria, which received the Protected Geographical Indications recognition.
未开放的刺山柑花蕾（刺山柑）通常在 Mediterranean 地区用作食品调味料，被认为是生物活性化合物的良好来源。本工作的目的是评估来自意大利潘泰莱里亚岛不同地区的盐渍刺山柑的营养保健品价值，通过 2,2-二苯基-1-苦基肼（DPPH）、[2,2-偶氮双（3-乙基苯并噻唑啉-6-磺酸）]二铵盐（ABTS）和氧自由基吸收能力（ORAC）测定法来测试其甲基乙二醛和乙醛捕获能力和抗氧化活性。亲水提取物也通过高效液相色谱-电喷雾电离/质谱进行了表征。在所检测到的 24 种化合物中，鉴定出了几种类黄酮衍生物和硫代葡萄糖苷。在所考虑的 5 个品系中，山奈酚和槲皮素衍生物的水平差异很大（6.46 至 267.93 和 22.39 至 367.14mg 山奈酚和槲皮素当量/g 鲜重），山奈酚衍生物比槲皮素衍生物更具代表性。Person 系数表明总酚含量与抗 DPPH 自由基能力（R=0.665）之间，总类黄酮含量与抗氧化能力（通过 ORAC 测定法；R=0.888）之间以及总类黄酮含量与乙醛和甲基乙二醛捕获能力（R=0.918）之间高度相关。结果表明，来自潘泰莱里亚岛的刺山柑是生物活性化合物的丰富来源，具有潜在的营养保健品相关性。 实际应用：本研究的结果强调了潘泰莱里亚刺山柑消费的健康益处，因为它们含有抗氧化剂，具有生物特性（抗自由基和α-二羰基化合物捕获），与多种慢性退行性疾病的发展有关。这些结果对于涉及潘泰莱里亚刺山柑生产的农业和商业部门也很重要，该地区已获得受保护的地理标志认可。
