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Isolation and Characterization of Wheat Derived Nonspecific Lipid Transfer Protein 2 (nsLTP2)
Journal of Food Science ( IF 3.2 ) Pub Date : 2018-05-22 , DOI: 10.1111/1750-3841.14175
Sara Bosi 1 , Jessica Fiori 2 , Giovanni Dinelli 1 , Neil Rigby 3 , Emanuela Leoncini 4 , Cecilia Prata 2 , Valeria Bregola 1 , Ilaria Marotti 1 , Roberto Gotti 2 , Marina Naldi 2 , Luca Massaccesi 4 , Marco Malaguti 4 , Paul Kroon 3 , Silvana Hrelia 4, 5
Affiliation  

Numerous studies support the protective role of bioactive peptides against cardiovascular diseases. Cereals represent the primary source of carbohydrates, but they also contain substantial amounts of proteins, therefore representing a potential dietary source of bioactive peptides with nutraceutical activities. The analysis of wheat extracts purified by chromatographic techniques by means of HPLC-UV/nanoLC-nanoESI-QTOF allowed the identification of a signal of about 7 kDa which, following data base searches, was ascribed to a nonspecific lipid-transfer protein (nsLTP) type 2 from Triticum aestivum (sequence coverage of 92%). For the first time nsLTP2 biological activities have been investigated. In particular, in experiments with human umbilical vein endothelial cells (HUVEC), nsLTP2 displayed antioxidant and cytoprotective activities, being able to significantly decrease reactive oxygen species (ROS) levels and to reduce lactate dehydrogenase (LDH) release, generated following oxidative (hydrogen peroxide) and inflammatory (tumor necrosis factor α, interleukin-1β, and lipopolysaccharide) stimulation. The obtained promising results suggest potential protective role of nsLTP2 in vascular diseases prevention. PRACTICAL APPLICATION: nsLTP 2 peptide is resistant to proteases throughout the gastrointestinal tract and exerts antioxidant and cytoprotective activities. These characteristics could be exploited in vascular diseases prevention.

中文翻译:

小麦衍生的非特异性脂质转移蛋白 2 (nsLTP2) 的分离和表征

许多研究支持生物活性肽对心血管疾病的保护作用。谷物代表碳水化合物的主要来源,但它们也含有大量蛋白质,因此代表具有营养活性的生物活性肽的潜在膳食来源。借助 HPLC-UV/nanoLC-nanoESI-QTOF 对通过色谱技术纯化的小麦提取物进行分析,可以鉴定出约 7 kDa 的信号,根据数据库搜索,该信号被归为非特异性脂质转移蛋白 (nsLTP)来自普通小麦的 2 型(序列覆盖率为 92%)。首次对 nsLTP2 生物活性进行了研究。特别是,在人脐静脉内皮细胞 (HUVEC) 的实验中,nsLTP2 显示出抗氧化和细胞保护活性,能够显着降低活性氧 (ROS) 水平并减少乳酸脱氢酶 (LDH) 释放,这是在氧化(过氧化氢)和炎症(肿瘤坏死因子 α、白细胞介素-1β 和脂多糖)刺激后产生的。获得的有希望的结果表明 nsLTP2 在血管疾病预防中的潜在保护作用。实际应用:nsLTP 2 肽对整个胃肠道中的蛋白酶具有抗性,并发挥抗氧化和细胞保护活性。这些特征可用于血管疾病的预防。和脂多糖)刺激。获得的有希望的结果表明 nsLTP2 在血管疾病预防中的潜在保护作用。实际应用:nsLTP 2 肽对整个胃肠道中的蛋白酶具有抗性,并发挥抗氧化和细胞保护活性。这些特征可用于血管疾病的预防。和脂多糖)刺激。获得的有希望的结果表明 nsLTP2 在血管疾病预防中的潜在保护作用。实际应用:nsLTP 2 肽对整个胃肠道中的蛋白酶具有抗性,并发挥抗氧化和细胞保护活性。这些特征可用于血管疾病的预防。
更新日期:2018-05-22
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