title: Periplaneta americana arginine kinase as a major cockroach allergen among Thai patients with major cockroach allergies.
abstract: Periplaneta americana is the predominant cockroach (CR) species and a major source of indoor allergens in Thailand. Nevertheless, data on the nature and molecular characteristics of its allergenic components are rare. We conducted this study to identify and characterize the P. americana allergenic protein. A random heptapeptide phage display library and monoclonal antibody (MAb) specific to a the P. americana component previously shown to be an allergenic molecule were used to identify the MAb-bound mimotope and its phylogenic distribution. Two-dimensional gel electrophoresis, liquid chromatography, mass spectrometry, peptide mass fingerprinting, and BLAST search were used to identify the P. americana protein containing the MAb-specific epitope. We studied the allergenicity of the native protein using sera of CR-allergic Thai patients in immunoassays. The mimotope peptide that bound to the MAb specific to P. americana was LTPCRNK. The peptide has an 83-100% identity with proteins of Anopheles gambiae, notch homolog scalloped wings of Lucilia cuprina, delta protein of Apis mellifera; neu5Ac synthase and tyrosine phosphatase of Drosophila melanogaster, and a putative protein of Drosophila pseudoobscura. This finding implies that the mimotope-containing molecule of P. americana is a pan-insect protein. The MAb-bound protein of P. americana was shown to be arginine kinase that reacted to IgE in the sera of all of the CR-allergic Thai patients by immunoblotting, implying its high allergenicity. In conclusion, our results revealed that P. americana arginine kinase is a pan-insect protein and a major CR allergen for CR-allergic Thai patients.
authors.affiliation: Graduate Studies, Faculty of Allied Health Sciences, Thammasat University, Rangsit Center, Pathum-thani, Thailand.
authors.forename: Nitat
authors.initials: N
authors.lastname: Sookrung
authors.forename: Wanpen
authors.initials: W
authors.lastname: Chaicumpa
authors.forename: Anchalee
authors.initials: A
authors.lastname: Tungtrongchitr
authors.forename: Pakit
authors.initials: P
authors.lastname: Vichyanond
authors.forename: Chaweewan
authors.initials: C
authors.lastname: Bunnag
authors.forename: Pongrama
authors.initials: P
authors.lastname: Ramasoota
authors.forename: Pongsri
authors.initials: P
authors.lastname: Tongtawe
authors.forename: Yuwaporn
authors.initials: Y
authors.lastname: Sakolvaree
authors.forename: Pramuan
authors.initials: P
authors.lastname: Tapchaisri
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D001122:Arginine Kinase / Q000276:immunology*; D001483:Base Sequence; D015153:Blotting, Western; D017931:DNA Primers; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D010526:Periplaneta / Q000201:enzymology / Q000276:immunology*; D016133:Polymerase Chain Reaction; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013785:Thailand
chemical_list: D000911:Antibodies, Monoclonal; D017931:DNA Primers; D001122:Arginine Kinase