Highland barley protein

  • 文章类型: Journal Article
    晚期糖基化终产物(AGEs)可在糖氧化反应期间引起。这种反应与糖尿病并发症和健康问题的后果有关。因此,我们正在探索高地大麦蛋白水解物(HBPHs)对AGE形成的禁止作用。在这里,首先在各种pH条件下从高原大麦中提取蛋白质,然后使用四种不同的蛋白水解酶(flavourzyme,胰蛋白酶,木瓜蛋白酶,胃蛋白酶)在不同程度的水解。我们评估了三度水解产物(最低,中间,最高)用于表征抗氧化活性和理化性质的酶。在所有的水解产物中,黄酮酶处理的水解产物F-1,F-2和F-3表明清除DPPH的能力很高(IC50值为0.97%,0.63%,和0.90%),结构和功能特性。最后,在多个葡萄糖-糖化牛血清白蛋白(BSA)系统中评估了活性最强的水解产物F-1,F-2和F-3对AGEs形成的抑制作用.此外,在BSA系统中,F-3表现出较强的抗糖基化活性,有效抑制非荧光AGE(CML),和果糖胺水平。此外,它减少了羰基化合物,同时也防止了硫醇基团的损失。我们的结果将有益于食品工业作为几种慢性疾病的潜在抗糖基化剂的应用。
    Advanced glycation end products (AGEs) can be caused during a glycoxidation reaction. This reaction is associated with complications of diabetes and the consequences of health problems. Therefore, we are exploring the prohibitory effect of highland barley protein hydrolysates (HBPHs) on AGE formation. Herein, first extracted the protein from highland barley with various pH conditions and then hydrolyzed using four different proteolytic enzymes (flavourzyme, trypsin, papain, pepsin) under different degrees of hydrolysis. We assessed three degrees of hydrolysates (lowest, middle, highest) of enzymes used to characterize the antioxidant activity and physicochemical properties. Among all the hydrolysates, flavourzyme-treated hydrolysates F-1, F-2, and F-3 indicated the high ability to scavenge DPPH (IC50 values of 0.97 %, 0.63 %, and 0.90 %), structural and functional properties. Finally, the inhibitory effect of the most active hydrolysates F-1, F-2, and F-3 against the AGEs formation was evaluated in multiple glucose-glycated bovine serum albumin (BSA) systems. Additionally, in a BSA system, F-3 exhibited the strong antiglycation activity, effectively suppressed the non-fluorescent AGE (CML), and the fructosamine level. Moreover, it decreased carbonyl compounds while also preventing the loss of thiol groups. Our results would be beneficial in the application of the food industry as a potential antiglycation agent for several chronic diseases.
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  • 文章类型: Journal Article
    背景:镇静激素胆囊收缩素(CCK)在抑制食物摄入中起重要作用。它的分泌受饮食成分调节。寻找诱导CCK分泌的生物活性化合物目前是一个活跃的研究领域。这项研究的目的是评估高原大麦蛋白消化(HBPD)在体外和体内刺激CCK分泌的能力,并鉴定负责的肽序列。
    结果:采用体外胃肠消化模型制备HBPD。HBPD中<1000Da的肽占82%。HBPD富含必需氨基酸Leu,Phe和Val,但缺乏硫氨基酸Met和Cys。浓度为5mg/mL的HBPD处理显著刺激肠内分泌STC-1细胞分泌CCK(P<0.05)。此外,小鼠口服HBPD管饲法显着增加血浆CCK水平。进行色谱分离以分离参与CCK分泌的肽级分,并通过UPLC-MS/MS确定肽序列。指出了两种新型的胆囊收缩素释放肽PDLP和YRIVPL具有出色的CCK促分泌活性。
    结论:这项研究首次证明了HBPD具有体外和体内刺激CCK分泌的能力,并确定了在HBPD中发挥CCK促分泌活性的生物活性肽。本文受版权保护。保留所有权利。
    BACKGROUND: The satiety hormone cholecystokinin (CCK) plays an important role in food intake inhibition. Its secretion is regulated by dietary components. The search for bioactive compounds that induce CCK secretion is currently an active area of research. The objective of this study was to evaluate the ability of highland barley protein digest (HBPD) to stimulate CCK secretion in vitro and in vivo and identify the responsible peptide sequences.
    RESULTS: HBPD was prepared by in vitro gastrointestinal digestion model. Peptides of <1000 Da in HBPD accounted for 82%. HBPD was rich in essential amino acids Leu, Phe and Val, but lack in sulfur amino acids Met and Cys. HBPD treatment at a concentration of 5 mg mL-1 significantly stimulated CCK secretion from enteroendocrine STC-1 cells (P < 0.05). Moreover, oral gavage with HBPD in mice significantly increased plasma CCK level. Chromatographic separation was performed to isolate peptide fractions involved in CCK secretion and peptide sequence was determined by ultra-performance liquid chromatography-tandem mass spectrometry. Two novel CCK-releasing peptides, PDLP and YRIVPL, were pointed out for their outstanding CCK secretagogue activity.
    CONCLUSIONS: This study demonstrated for the first time that HBPD had an ability to stimulate CCK secretion in vitro and in vivo and determined the bioactive peptides exerting CCK secretagogue activity in HBPD. © 2023 Society of Chemical Industry.
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