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典型热加工对花生致敏蛋白及其免疫反应性的影响 总被引:2,自引:0,他引:2
《食品工业科技》2015,(5)
通过免疫学方法检测了花生制品加工过程中几种典型热加工方式对花生致敏蛋白的免疫反应性的影响。结果表明:烘焙、水煮、油炸和高温高压处理均使花生可溶性蛋白含量显著降低;随之,处理后样品中蛋白提取物的免疫反应性也显著下降,其中高温高压处理最为显著;热处理对花生致敏蛋白Ara h 2的溶解性及免疫反应性的影响较小,而对Ara h1和Ara h 3的影响则比较明显。 相似文献
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花生不仅本身是一种营养丰富的食品,而且作为原料或配料广泛应用于食品加工中。然而花生及其制品是FAO/WHO认定的八大类食物过敏原之一,可导致严重的过敏反应,通常伴随终身,甚至危及生命。不同地区的人们食用花生的加工方式不同,其花生过敏的患病率也有所不同,热加工是花生的主要加工方式,因此各类热加工导致的花生致敏性变化成为研究热点。过敏原蛋白的分离作为花生热加工研究中的重要步骤,也变得十分重要。本文主要对常见的3种热加工花生(水煮、油炸和烘烤)中的花生蛋白分离及其过敏原纯化的方法研究进行综述。现有的花生热加工研究中蛋白分离技术主要是通过溶剂浸提;而过敏原纯化技术主要是借助层析法,根据各组分在物理化学性质上的差异进行纯化;此外还可以根据最终研究目的的不同采用其他的辅助方法达到分离纯化效果。通过对现有分离纯化方法进行了解和比较,可为热加工花生过敏原蛋白的分离纯化甚至进一步的分析检测提供理论参考和指导。 相似文献
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不同食品加工方式对提取鮟鱇鱼肉DNA的影响 总被引:1,自引:1,他引:0
目的研究不同食品加工方式对提取鮟鮟鱼肉DNA的影响。方法以实时荧光PCR方法检测鮟鮟鱼成分标准为例,采取水煮、微波、油炸3种处理方式,选用试剂盒提取DNA,利用核酸蛋白测定仪测定其在260 nm、280 nm处的吸光度,通过A260来计算核酸浓度,A260/A280来评估核酸的纯度。以提取的DNA为模板,进行实时荧光PCR扩增。通过Ct值判断不同加工方式对实时荧光PCR结果的影响。结果水煮、微波、油炸3种加工方式中,油炸对DNA的影响最明显,当在高温下油炸时间过久会导致鱼肉焦糖化反应及蛋白质变性严重,变成具有一定孔隙的焦状物,此时鱼肉在提取DNA的过程中难以消化,造成DNA提取量少,最终导致实时荧光PCR结果假阴性。而水煮、微波两种加工方式即使处理时间过久也没有对实时荧光PCR结果产生明显影响。结论在鱼制品使用实时荧光PCR方法检测时,应充分考虑加工方式对鱼制品DNA的影响。 相似文献
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为扩大花生的开发利用,优化花生加工产品风味,研究水煮花生、油炒花生、烘烤花生3种制法花生的香气成分特征及差异.采用热脱附法提取样品的香气成分,并通过气相色谱-质谱及氢火焰离子检测器法(GC-MSD-FID)进行分析.其中水煮花生检出49种挥发性物质,油炒花生检出57种,烘烤花生检出79种.各花生制品分析出来的挥发性物质... 相似文献
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不同加工方法对花生总黄酮含量的影响 总被引:2,自引:0,他引:2
为研究不同加工方法对花生总黄酮含量的影响,以东北花生、山东花生、临汾花生为原料,采用水煮、油炸、微波三种方法处理不同产地的花生.试验结果表明,在水煮、微波、油炸处理过程中,每种处理方法对三种产地的花生总黄酮含量影响的变化规律基本一致.水煮过程中,随着水煮温度的升高和水煮时间的延长,花生总黄酮含量先是增加,随后降低.在水煮温度接近80℃,水煮时间20 min时,水煮处理的花生总黄酮含量增加最多.微波处理过程中,随着微波功率的增加和处理时间的延长,花生总黄酮含量一直呈下降趋势.油炸过程中,随着油炸温度的升高和油炸时间的延长,花生黄酮含量呈显著线性下降趋势.其中,微波处理的花生总黄酮含量下降最多. 相似文献
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YAN-JUN CONG FEI LOU LIN-FENG LI WEN-TONG XUE JING WANG HUI ZHANG JUN-FENG FAN 《Journal of Food Biochemistry》2008,32(3):353-367
Peanut allergens have not been studied in China. This study aimed to investigate (1) whether there are differences in the relative amounts of major peanut allergens between the Chinese peanut varieties and the American, and (2) the effect of cooking methods on peanut allergenicity. The allergenic property of raw peanuts and peanut preparations was assessed by immunoblotting and enzyme-linked immunosorbent assay. The relative contents of the major peanut allergens were quantified by sodium dodecyl sulphate-polyacrylamide gel electrophoresis densitometry. For results, Ara h 1 and Ara h 3 were major peanut allergens in China. The amounts of Ara h 1 and Ara h 3 in peanut varieties differ significantly and were both lower than the American varieties. The immunoglobulin E (IgE)-binding ability of different processed peanuts to IgE was not significantly different. Therefore, peanut varieties may induce different amounts of allergens. The relative lower contents of Ara h 1 and Ara h 3 may lead to the lower prevalence of peanut allergy.
Because of its nutritional and rheological properties, peanut is used in a wide range of different foods, and peanut allergy represents an important health problem. It is essential to identify the compounds of peanut allergens and to study their characteristics in order to explore approaches for the therapies and to breed the nonallergenic peanut seed. 相似文献
PRACTICAL APPLICATIONS
Because of its nutritional and rheological properties, peanut is used in a wide range of different foods, and peanut allergy represents an important health problem. It is essential to identify the compounds of peanut allergens and to study their characteristics in order to explore approaches for the therapies and to breed the nonallergenic peanut seed. 相似文献
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Susanne Krause Ties Latendorf Hendrik Schmidt Yasemin Darcan‐Nicolaisen Gerald Reese Arnd Petersen Ottmar Janssen Wolf‐Meinhard Becker 《Molecular nutrition & food research》2010,54(3):381-387
Peanut allergy is a major cause of food‐induced severe anaphylactic reactions. To date, no medical care is available to prevent and treat peanut allergy and therefore hypoallergenic peanut varieties are of considerable health political and economic interest. Major allergens that induce IgE‐responses in peanut‐sensitive patients are Ara h 1, Ara h 2 and Ara h 3/4. In order to identify hypoallergenic peanuts, commercially locally available peanut varieties were screened for their allergen content. Ara h 1‐deficient peanuts from Southeast Asia were identified by SDS‐PAGE, immunoblotting, inhibition assays and ELISA. 2‐D PAGE analyses demonstrated the different compositions of the tested extracts and revealed a number of variations of the allergen patterns of peanuts from different varieties. Mediator release experiments of these peanut extracts demonstrated similar allergenicities as compared with standard peanut extract. These results indicate that the allergenicity of peanuts with reduced Ara h 1 content might be compensated by the other allergens, and thus do not necessarily cause a reduction of allergenicity. 相似文献
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中国花生致敏蛋白的识别 总被引:2,自引:0,他引:2
我国对花生过敏方面的研究很少。本实验利用中国常用花生品种识别鉴定了中国主要的致敏蛋白,比较了国内外花生品种致敏蛋白相对含量的差异,期望找到中国花生过敏发病率较低的原因,为临床食物过敏患者的治疗和低过敏花生品种的培育提供理论依据。研究结果表明:Ara h1和三条Ara h3多肽是中国主要的致敏蛋白,并发现了Ara h1的亚基,分子量为58kD的多肽。Ara h1和Ara h3的相对含量各品种之间差异显著,并且低于国外花生品种。因此中国花生主要致敏蛋白相对含量低可能是导致中国花生过敏发病率较低的主要原因。 相似文献
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目的 阐明加工过程中脂质过氧化物对花生过敏蛋白Ara h 1结构和过敏原性的影响.方法 通过十二烷基硫酸钠聚丙烯酰胺凝胶电泳技术,圆二色谱法和内源荧光光谱法研究不同脂质过氧化物[2,2-偶氮二(2-甲基丙基咪)二盐酸盐(2,2'-azobis(2-methylpropanimidamide)dihydrochlorid... 相似文献
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Jianmei Yu Ipek Goktepe Mohamed Ahmedna 《International Journal of Food Science & Technology》2013,48(6):1224-1234
This study investigated the effects of enzymatic treatment of peanut butter on two‐major peanut allergens (Ara h 1 and Ara h 2). Home‐made and commercial peanut butter samples were treated with alpha‐chymotrypsin, trypsin or the combination of these enzymes and incubated at room temperature for 24 h or at 37 °C for 3 h. Treated peanut butter samples were sampled weekly for evaluation of total soluble proteins and extractable Ara h 1/Ara h 2. Data show that 1:1 alpha‐chymotrypsin: trypsin at 0.04% of enzyme‐to‐peanut butter ratio resulted in near complete reduction of extractable Ara h 1 and Ara h 2 respectively. Treatment of peanut butter with a combination of trypsin and alpha‐chymotrypsin resulted in a decrease in IgE‐binding, suggesting that enzymatic treatment has the potential to reduce the allergenicity. However, clinical tests are needed to confirm any reduction in allergenic potential. The amount of water used to disperse enzyme did not have significant effect on allergen reduction but affected the consistency and colour of treated products, especially when the amount of water added was above 5% of peanut butter weight. 相似文献
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Hubert Chassaigne Marcel BrohéeJørgen V. Nørgaard Arjon J. van Hengel 《Food chemistry》2007,105(4):1671-1681
A two-step sequential extraction method of peanut proteins was proposed with the aim to investigate the protein composition and allergen content of peanut samples. The extraction procedure reported is fully compatible with subsequent analysis by enzyme-linked immunosorbent assays (ELISA) as well as 2D gel electrophoresis (2D PAGE). This sequential extraction method was used to study three different peanut varieties and three different types of food processing. Peanuts were analysed for total protein content and the extraction efficiency of raw and processed peanuts was determined. The total protein content of the three peanut varieties was found to be comparable, but their extraction efficiency varies. The peanut extracts were characterised by employing three different ELISA test kits specific to either the allergens Ara h 1 or Ara h 2, or to soluble peanut proteins. The content of both Ara h 1 and Ara h 2 differed in the raw peanut extracts of the three varieties. However, thermal processing resulted in much larger changes in detectability. Blanching significantly increases the detectability of Ara h 2, whereas Ara h 1 detection remains almost unchanged. After roasting a clear decrease of detectability was observed for both Ara h 1 and Ara h 2, although the effect is more severe for Ara h 1. 2D PAGE was employed to compare the protein profiles and abundances of peanut extracts. Statistically relevant differences were observed for the two different protein fractions obtained by using the described method, showing the relevance of this two-step sequential extraction method. 相似文献
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Blanc F Vissers YM Adel-Patient K Rigby NM Mackie AR Gunning AP Wellner NK Skov PS Przybylski-Nicaise L Ballmer-Weber B Zuidmeer-Jongejan L Szépfalusi Z Ruinemans-Koerts J Jansen AP Bernard H Wal JM Savelkoul HF Wichers HJ Mills EN 《Molecular nutrition & food research》2011,55(12):1887-1894
Scope : Roasting rather than boiling and Maillard modifications may modulate peanut allergenicity. We investigated how these factors affect the allergenic properties of a major peanut allergen, Ara h 1. Methods and results : Ara h 1 was purified from either raw (N‐Ara h 1) or roasted (R‐Ara h 1) peanuts. Boiling (100°C 15 min; H‐Ara h 1) resulted in a partial loss of Ara h 1 secondary structure and formation of rod‐like branched aggregates with reduced IgE‐binding capacity and impaired ability to induce mediator release. Glycated Ara h 1 (G‐Ara h 1) formed by boiling in the presence of glucose behaved similarly. However, H‐ and G‐Ara h1 retained the T‐cell reactivity of N‐Ara h 1. R‐Ara h 1 was denatured, comprised compact, globular aggregates, and showed no evidence of glycation but retained the IgE‐binding capacity of the native protein. Conclusion : Ara h 1 aggregates formed by boiling were morphologically distinct from those formed by roasting and had lower allergenic activity. Glycation had no additional effect on Ara h 1 allergenicity compared with heating alone. Taken together with published data on the loss of Ara h 2/6 from boiled peanuts, this supports the hypothesis that boiling reduces the allergenicity of peanuts. 相似文献
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食品加工或食物基质可以不同程度地影响过敏原消化稳定性和免疫原性。然而,对食品加工和食物基质对 食物模型中过敏原的影响却知之甚少。本实验通过体外模拟胃肠消化的方式,包括模拟口腔咀嚼、胃部消化和十二 指肠消化,采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳和免疫印迹的方法,分析焙烤模型饼干中小麦过敏原和花生 过敏原的消化特性和免疫原性。结果显示:小麦和花生蛋白均可被胃蛋白酶迅速水解,醇溶蛋白、谷蛋白等致敏原 被降解成低分子质量多肽;可溶性蛋白中花生过敏原Ara h 1和Ara h 3基本消失,Ara h 2/6耐受胃肠消化;酶联免疫 吸附测定结果显示,消化后饼干中过敏原的致敏性降低。综合以上结果表明,饼干模型的消化性质基本不受焙烤加 工和其他基质的影响,免疫原性因致敏原被消化而降低。 相似文献