Shrimp Extract Exacerbates Allergic Immune Responses in Mice: Implications on Clinical Diagnosis of Shellfish Allergy.

Autor: Tong WS; School of Life Sciences, The Chinese University of Hong Kong, HKSAR, China., Li S; School of Life Sciences, The Chinese University of Hong Kong, HKSAR, China., Leung NYH; Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China., Wong WT; School of Life Sciences, The Chinese University of Hong Kong, HKSAR, China., Leung TF; Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China., Leung PSC; Division of Rheumatology, Allergy and Clinical Immunology, University of California, Davis, CA, USA., Chu KH; School of Life Sciences, The Chinese University of Hong Kong, HKSAR, China.; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China., Wai CYY; Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China. christineyywai@cuhk.edu.hk.; Hong Kong Hub of Paediatric Excellence (HK HOPE), Faculty of Medicine, The Chinese University of Hong Kong, HKSAR, China. christineyywai@cuhk.edu.hk.
Jazyk: angličtina
Zdroj: Clinical reviews in allergy & immunology [Clin Rev Allergy Immunol] 2024 Apr; Vol. 66 (2), pp. 250-259. Date of Electronic Publication: 2024 May 22.
DOI: 10.1007/s12016-024-08994-4
Abstrakt: Tropomyosin has been identified as the major cross-reactive shellfish allergen, but recent studies showed the presence of other clinically relevant allergens. This study aims at determining the allergic immune responses of mice sensitized with raw and boiled shrimp extracts in comparison to recombinant tropomyosin (rTM). Female Balb/c mice were intragastrically sensitized and challenged with raw, boiled shrimp or rTM. Systemic, cellular and humoral allergic responses were compared, while allergenicity of the extracts was also compared by skin prick test (SPT) and immunoblot on shrimp allergic subjects. We showed that rTM and shrimp extracts induced IgE- and Th2-mediated allergic responses in mice, distinguished by remarkable intestinal inflammation in small intestine across all regimens. Notably, boiled shrimp extract exhibited the highest sensitization rate (73.7% of mice developed positive TM-specific IgE response) when compared with raw extract (47.8%) and rTM (34.8%). Mice sensitized with boiled extract manifested the highest allergen-specific IgE and Th2 cytokine responses than the others. Immunoblot results indicated that tropomyosin remained the major allergen in extract-based sensitization and had stronger allergenicity in a heat-treated form comparing to untreated TM, which was in line with the SPT results that boiled extract induced larger wheal size in patients. Hemocyanin and glycogen phosphorylase were also identified as minor allergens associated with manifestation of shrimp allergy. This study shows that boiled extract enhanced sensitization and Th2 responses in agreement with the higher allergenicity of heat-treated TM. This study thus presents three shrimp allergy murine models suitable for mechanistic and intervention studies, and in vivo evidence implies higher effectiveness of boiled extract for the clinical diagnosis of shellfish allergy.
(© 2024. The Author(s).)
Databáze: MEDLINE
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