Allergenicity of bony and cartilaginous fish – molecular and immunological properties

Stephen, J.N., Sharp, M.F., Ruethers, T., Taki, A., Campbell, D.E., and Lopata, A.L. (2017) Allergenicity of bony and cartilaginous fish – molecular and immunological properties. Clinical & Experimental Allergy, 47 (3). pp. 300-312.

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Allergy to bony fish is common and probably increasing world-wide. The major heat-stable pan-fish allergen, parvalbumin (PV), has been identified and characterized for numerous fish species. In contrast, there are very few reports of allergic reactions to cartilaginous fish despite widespread consumption. The molecular basis for this seemingly low clinical cross-reactivity between these two fish groups has not been elucidated. PV consists of two distinct protein lineages, α and β. The α-lineage of this protein is predominant in muscle tissue of cartilaginous fish (Chondrichthyes), while β-PV is abundant in muscle tissue of bony fish (Osteichthyes). The low incidence of allergic reactions to ingested rays and sharks is likely due to the lack of molecular similarity, resulting in reduced immunological cross-reactivity between the two PV lineages. Structurally and physiologically, both protein lineages are very similar; however, the amino acid homology is very low with 47-54%. Furthermore, PV from ancient fish species such as the coelacanth demonstrates 62% sequence homology to leopard shark α-PV and 70% to carp β-PV. This indicates the extent of conservation of the PV isoforms lineages across millennia. This review highlights prevalence data on fish allergy and sensitization to fish, and details the molecular diversity of the two protein lineages of the major fish allergen PV among different fish groups, emphasizing the immunological and clinical differences in allergenicity.

Item ID: 47978
Item Type: Article (Research - C1)
ISSN: 1365-2222
Funders: Center for AIDS Research (CFAR), National Health and Medical Research Council (NHMRC)
Date Deposited: 31 Mar 2017 05:00
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3204 Immunology > 320401 Allergy @ 70%
31 BIOLOGICAL SCIENCES > 3102 Bioinformatics and computational biology > 310206 Sequence analysis @ 30%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920108 Immune System and Allergy @ 100%
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