桦树花粉、大豆和苹果过敏原之间高免疫球蛋白E相关性表明中国北方地区桦树花粉过敏患者很可能同时患有花粉–食物综合征（英文）

High correlation of specific IgE sensitization between birch pollen, soy and apple allergens indicates pollen-food allergy syndrome among birch pollen allergic patients in northern China

目的:研究中国北方地区桦树花粉过敏及花粉–食物过敏综合征。创新点:国内首次研究花粉–食物过敏综合征,为中国北方地区此类患者的诊断和治疗提出了新思路。方法:采集临床中过敏患者血清,检测桦树花粉及其主要过敏原特异性免疫球蛋白E(IgE),同时检测大豆和苹果过敏原的特异性IgE,并评价其相关性。结论:中国北方地区桦树花粉季节对此花粉过敏的患者有16.7%以上,主要是对桦树花粉第一组过敏原致敏。这些患者大多数同时对大豆和苹果的主要过敏原过敏,这种特异性IgE高相关性说明临床上存在花粉–食物过敏综合征。

Background： Birch pollen sensitization and associated pollen-food syndrome among Chinese allergic patients have not been investigated. Methods： Sera from 203 allergic patients from the northern part of China and collected during February to July 2014 were investigated. Specific immunoglobulin E （IgE） against birch pollen extract Bet v and major birch pollen allergen Bet v 1 were measured using the ADVIA Centaur. The presence of major apple allergen Mal d 1 and soy bean allergen Gly m 4 specific IgE was measured by ImmunoCAP 100. Results： Among the 203 sere, 34 sera （16.7%） had specific IgE to Bet v and of these, 28 sere （82.4%） contained Bet v 1-specific IgE. Among the 28 sera with Bet v 1-specific IgE, 27 sera （96.4%） contained Mal d 1-specific IgE and 22 sera （78.6%） contained Gly m 4-specific igE. Of the 34 Bet v-positive sera, 6 sera （17.6%） contained no specific IgE for Bet v 1, Mal d 1, or Gly m 4. Almost all Bet v-positive sera were donated during the birch pollen season. Conclusions： The prevalence of birch allergy among patients visiting health care during pollen season can be as high as 16.7% in Tangshan City. The majority of Chinese birch allergic patients are IgE-sensitized to the major birch pollen allergen Bet v 1 as well as to the major apple allergen Mal d 1 and soy bean allergen Gly m 4. A relatively high number of patients （17.6%） are IgE-sensitized to birch pollen allergen（s） other than Bet v 1. The high prevalence of specific IgE to Mal d 1 and Gly m 4 among Bet v 1-sensitized patients indicates that pollen-food allergy syndrome could be of clinical relevance in China.