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Stability of extracts from pollens of allergenic importance in Korea

 Kyoung Yong Jeong  ;  Ji Eun Yuk  ;  Jongsun Lee  ;  Seok Woo Jang  ;  Kyung Hee Park  ;  Jae-Hyun Lee  ;  Jung-Won Park 
 KOREAN JOURNAL OF INTERNAL MEDICINE, Vol.35(1) : 222-230, 2020 
Journal Title
Issue Date
Allergen ; Protein stability ; Rhinitis, allergic, seasonal
BACKGROUND/AIMS: Accurate diagnosis and the effects of allergen-specific immunotherapy for pollinosis are greatly dependent on the potency and stability of the extract. This study aimed to examine factors, such as temperature and storage buffer composition, that affect the stability of allergen extracts from pollens of allergenic importance in Korea. METHODS: We prepared four pollen allergen extracts from ragweed, mugwort, Japanese hop, and sawtooth oak, which are the most important causes of seasonal rhinitis in Korea. Changes of protein and major allergen concentration were measured over 1 year by Bradford assay, two-site enzyme-linked immunosorbent assay, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis after reconstitution of the lyophilized allergen extract in various buffers and stored at room temperature (RT, 18°C to 26°C) or refrigerated (4°C). RESULTS: More than 90% of the original protein concentration in all four extracts examined was detected over 1 year when 50% glycerol was added and refrigerated, whereas 57.9% to 94.5% remained in the extracts at RT. The addition of 50% glycerol to the storage buffer was found to prevent protein degradation at RT. Amb a 1, a major allergen of ragweed, was almost completely degraded in 9 weeks at RT when reconstituted in a buffer without 50% glycerol. However, 55.6% to 92.8% of Amb a 1 content was detected after 1 year of incubation at 4°C in all buffer conditions except 0.3% phenol. CONCLUSION: Addition of 50% glycerol as well as refrigeration was found to be important in increasing the shelf-life of allergen extracts from pollens of allergenic importance.
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1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
5. Research Institutes (연구소) > Institute of Allergy (알레르기연구소) > 1. Journal Papers
Yonsei Authors
Park, Kyung Hee(박경희) ORCID logo https://orcid.org/0000-0003-3605-5364
Park, Jung Won(박중원) ORCID logo https://orcid.org/0000-0003-0249-8749
Yuk, Ji Eun(육지은)
Lee, Jae Hyun(이재현) ORCID logo https://orcid.org/0000-0002-0760-0071
Lee, Jongsun(이종선)
Jeong, Kyoung Yong(정경용) ORCID logo https://orcid.org/0000-0001-9887-1426
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