title: Differential IgE binding to isoallergens from Asian seabass (Lates calcarifer) in children and adults.
abstract: Fish allergy is a common food allergy, with prevalence rates in the general population ranging between 0.2% and 2.3%. In both adults and children fish ranks in the top eight foods known to cause IgE mediated food allergy. Fish allergy is rarely outgrown and individuals with fish allergy may be allergic to some but not all species of fish. Whilst fish allergy occurs around the world, the characterization of allergenic components of individual species of fish has been largely confined to Northern hemisphere and European fish species. To date allergy to commonly consumed fish in the Asian-Pacific region including barramundi (Asian seabass; Lates calcarifer) have been less well investigated. The aim of this study was to identify and characterize allergenic proteins from barramundi in both fish allergic adult and pediatric patients. Serum from 17 fish allergic adults and children from Australia were characterized by immunoblotting and enzyme linked immunosorbent assays (ELISA) against raw and heated barramundi. Molecular analysis of identified allergens included genetic sequencing and generation of recombinant isoallergens. Two novel parvalbumin isoforms of the β-type were identified as the only allergens in barramundi and subsequently designated as Lat c 1.0101 and Lat c 1.0201 by the International Union of Immunological Societies. These two isoallergens do not differ in their ability to bind IgE antibodies, but are differentially expressed in barramundi tissue. This study characterized two novel heat stable parvalbumin allergens from barramundi, with differential IgE binding capacity between adults and pediatric patients.
authors: School of Pharmacy and Molecular Science, Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville, Queensland, Australia.
authors: Michael F
authors: MF
authors: Sharp
authors: School of Pharmacy and Molecular Science, Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville, Queensland, Australia.
authors: Sandip D
authors: SD
authors: Kamath
authors: School of Pharmacy and Molecular Science, Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville, Queensland, Australia.
authors: Martina
authors: M
authors: Koeberl
authors: Aquaculture Genetics Research Program, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland, Australia.
authors: Dean R
authors: DR
authors: Jerry
authors: Department of Allergy, Immunology and Respiratory Medicine, Alfred Hospital And Monash University, Melbourne, Victoria, Australia.
authors: Robyn E
authors: RE
authors: O'Hehir
authors: Children's Hospital at Westmead, Allergy & Immunology, Westmead, NSW, Australia.
authors: Dianne E
authors: DE
authors: Campbell
authors: School of Pharmacy and Molecular Science, Centre for Biodiscovery and Molecular Development of Therapeutics, James Cook University, Townsville, Queensland, Australia. Electronic address: andreas.lopata@jcu.edu.au.
authors: Andreas L
authors: AL
authors: Lopata
mesh_terms: D000328:Adult; D000485:Allergens / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001492:Bass / Q000235:genetics / Q000276:immunology*; D002648:Child; D005260:Female; D029941:Fish Proteins / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D005512:Food Hypersensitivity / Q000276:immunology*; D006801:Humans; D007073:Immunoglobulin E / Q000276:immunology*; D008297:Male; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010320:Parvalbumins / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D011485:Protein Binding; D011487:Protein Conformation; D017386:Sequence Homology, Amino Acid
chemical_list: D000485:Allergens; D029941:Fish Proteins; D010320:Parvalbumins; D007073:Immunoglobulin E
keywords: Allergen; Asian seabass; Barramundi; Fish; IgE; Parvalbumin