Journal of Asthma and Allergy (2020-11-01)

Major Pollen Allergen Components and CCD Detection in Bermuda Grass Sensitized Patients in Guangzhou, China

  • Liao C,
  • Liang C,
  • Hu H,
  • Luo W,
  • Wu G,
  • Huang Z,
  • Wu L,
  • Sun B

Journal volume & issue
Vol. Volume 13
pp. 615 – 623

Abstract

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Chenxi Liao,* Cuiying Liang,* Haisheng Hu,* Wenting Luo, Ge Wu, Zhifeng Huang, Liting Wu, Baoqing Sun Department of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, National Clinical Research Center of Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong 510120, People’s Republic of China*These authors contributed equally to this workCorrespondence: Baoqing SunState Key Laboratory of Respiratory Disease, National Clinical Research Center of Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, 151 Yanjiangxi Road, Guangzhou, Guangdong 510120, People’s Republic of ChinaTel +86 20 8306 2865Fax +86 20 8306 2729Email [email protected]: Bermuda grass pollen is a common inhaled allergen. The aim of this study was to investigate the molecular sensitization patterns to major pollen allergens (Bermuda grass, Mugwort and Timothy grass) and cross-reactive carbohydrate determinants (CCD) in Bermuda grass sensitized patients in southern China.Methods: Serum specific IgE (sIgE) levels of Bermuda grass allergen components (Cyn d 1 and Cyn d 12), Timothy grass allergen components (Phl p 1, Phl p 4, Phl p 5, Phl p 7 and Phl p 12), Mugwort allergen components (Art v 1, Art v 3 and Art v 4) and CCD were detected in 78 patients sensitized to Bermuda grass via EUROBlotMaster system.Results: Compared with CCD-positive patients, those with negative CCD results had significant higher positive rates of Cyn d 1 (47.8% vs 14.5%), Phl p 1 (26.1% vs 7.3%), Phl p 12 (21.7% vs 3.6%) and Art v 4 (26.1% vs 3.6%) (all p < 0.05). Patients < 18 years old had the highest positive rate of Cyn d 1 (40.7%). Additionally, rhinitis patients had the highest positive rate of Cyn d 1 (60.0%), and all patients with Cyn d 12 sensitization (17.2%) were asthmatic patients. Optimal scale analysis showed that Phl p 1 and Cyn d 1 were closely related (Cronbach’s alpha = 85.1%).Conclusion: The highest positive rate of pollen allergen components was Cyn d 1 in Bermuda grass sensitized patients in southern China. Most patients were sensitized to CCD alone, and CCD may have less interference in the detection of Cyn d 1, Art v 4, Phl p 1 and Phl p 12. The sensitization patterns of pollen allergen components varied in different ages and diseases, and the diagnostic strategy of pollen allergen needs to be considered in the future.Keywords: Bermuda grass, component-resolved diagnosis, CRD, cross-reactive carbohydrate determinants, CCD, pollen allergen component, special IgE, EUROBlotMaster

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