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首页> 外文期刊>Allergy >Multiple wheat flour allergens and cross-reactive carbohydrate determinants bind IgE in baker's asthma.
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Multiple wheat flour allergens and cross-reactive carbohydrate determinants bind IgE in baker's asthma.

机译:贝克哮喘中多种小麦粉过敏原和交叉反应性碳水化合物决定因子结合IgE。

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BACKGROUND: Several wheat flour allergens relevant to baker's asthma have been identified in the last 25 years. The aim of this study was to determine the frequency of sensitization to these allergens in German bakers. METHODS: Using recombinant DNA technology, the following wheat flour allergens were cloned, expressed in Escherichia coli and purified: five subunits of the wheat alpha-amylase inhibitors (WTAI-CM1, WTAI-CM2, WTAI-CM3, WDAI-0.19 and WMAI-0.28), thioredoxin, thiol reductase or 1-cys-peroxiredoxin homologues, triosephosphate-isomerase, alphabeta-gliadin, serpin, glyceraldehyde-3-phosphate-dehydrogenase, a nonspecific lipid transfer protein (nsLTP), dehydrin, profilin and peroxidase. In addition, ImmunoCAPs with the recombinant allergen omega-5-gliadin and two cross-reactive carbohydrate determinants (CCDs), horse radish peroxidase (HRP) and the N-glycan of bromelain (MUXF), were used. Specific IgE was measured in wheat flour-positive sera from 40 German bakers with work-related asthma/rhinitis and 10 controls with pollinosis. RESULTS: Thirty bakers (75%) had IgE to at least one of the 19 single allergens. Most frequent was IgE to WDAI-0.19, HRP and MUXF (25% each), followed by WTAI-CM1 (20%), thiol reductase (16%), WTAI-CM3 (15%), WTAI-CM2 and thioredoxin (12.5%), WMAI-28, triosephosphate-isomerase, alphabeta-gliadin (10%), 1-cys-peroxiredoxin (7.5%), dehydrin, serpin, glyceraldehyde-3-phosphate-dehydrogenase (5%), omega-5-gliadin, nsLTP and profilin (2.5%). Fifteen bakers (38%) had IgE to any alpha-amylase inhibitor and 12 (30%) to at least one CCD. The controls reacted exclusively to CCDs (80%), profilin (60%), thioredoxin (30%), triosephosphate isomerase and nsLTP (10%). CONCLUSIONS: The single allergen sensitization profiles obtained with 17 recombinant wheat flour allergens and two CCDs revealed no major allergen for German bakers. The highest frequencies were found for alpha-amylase inhibitors and CCDs.
机译:背景:在过去的25年中,已经发现了几种与面包师哮喘有关的小麦粉过敏原。这项研究的目的是确定德国面包师对这些过敏原的致敏频率。方法:使用重组DNA技术,克隆了以下小麦面粉过敏原,在大肠杆菌中表达并纯化:小麦α-淀粉酶抑制剂的五个亚基(WTAI-CM1,WTAI-CM2,WTAI-CM3,WDAI-0.19和WMAI- 0.28),硫氧还蛋白,硫醇还原酶或1-cys-peroxiredoxin同源物,磷酸三糖异构酶,字母麦醇溶蛋白,丝氨酸蛋白酶抑制剂,3-磷酸甘油醛脱氢酶,非特异性脂质转移蛋白(nsLTP),脱水蛋白,脯氨酸蛋白和过氧化物酶。此外,还使用了具有重组过敏原omega-5-gliadin和两个交叉反应性碳水化合物决定簇(CCD),辣根过氧化物酶(HRP)和菠萝蛋白酶N-聚糖(MUXF)的ImmunoCAP。在来自40名患有工作相关哮喘/鼻炎的德国面包师和10名花粉病对照的小麦面粉阳性血清中测量了特异性IgE。结果:30位面包师(75%)对19种单一过敏原中的至少一种具有IgE。最常见的是WDAI-0.19,HRP和MUXF的IgE(各占25%),其次是WTAI-CM1(20%),硫醇还原酶(16%),WTAI-CM3(15%),WTAI-CM2和硫氧还蛋白(12.5) %),WMAI-28,磷酸三糖异构酶,字母麦角蛋白(10%),1-半胱氨酸过氧化物酶(7.5%),脱水蛋白,丝氨酸蛋白酶抑制剂,甘油醛3磷酸脱氢酶(5%),Ω5麦角蛋白,nsLTP和profilin(2.5%)。 15位面包师(38%)对任何α-淀粉酶抑制剂的IgE值,对至少一种CCD的IgE值的12位(30%)。对照仅对CCD(80%),profilin(60%),硫氧还蛋白(30%),磷酸三糖异构酶和nsLTP(10%)反应。结论:用17种重组小麦粉过敏原和两种CCD获得的单一过敏原致敏特征表明,德国面包师没有主要过敏原。发现α-淀粉酶抑制剂和CCD的频率最高。

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