Proteome mining for novel IgE-binding proteins from the German cockroach (Blattella germanica) and allergen profiling of patients.
Although cockroaches are known to produce allergens that can cause IgE-mediated hypersensitivity reactions, including perennial rhinitis and asthma, the various cockroach allergens have not yet been fully studied. Many proteins from the German cockroach show high IgE reactivity, but have never been comprehensively characterized. To identify these potential allergens, proteins were separated by 2-DE and IgE-binding proteins were analyzed by nanoLC-MS/MS or N-terminal sequencing analysis. Using a combination of proteomic techniques and bioinformatic allergen database analysis, we identified a total of ten new B. germanica IgE-binding proteins. Of these, aldolase, arginine kinase, enolase, Hsp70, triosephosphate isomerase, and vitellogenin have been reported as allergens in species other than B. germanica. Analysis of the Food Allergy Research and Resource Program allergen database indicated that arginine kinase, enolase, and triosephosphate isomerase showed significant potential cross-reactivity with other related allergens. This study revealed that vitellogenin is an important novel B. germanica allergen. Personalized profiling and reactivity of IgE Abs against the panel of IgE-binding proteins varied between cockroach-allergic individuals. These findings make it possible to monitor the individual IgE reactivity profile of each patient and facilitate personalized immunotherapies for German cockroach allergy disorders.
Graduate Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei, Taiwan.
Jiing-Guang
JG
Chuang
Song-Nan
SN
Su
Bor-Luen
BL
Chiang
How-Jing
HJ
Lee
Lu-Ping
LP
Chow
D000293:Adolescent; D000328:Adult; D000485:Allergens / Q000737:chemistry / Q000145:classification / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D020048:Blattellidae / Q000737:chemistry / Q000378:metabolism*; D002648:Child; D002675:Child, Preschool; D015180:Electrophoresis, Gel, Two-Dimensional; D005260:Female; D006801:Humans; D015151:Immunoblotting; D007073:Immunoglobulin E / Q000097:blood / Q000378:metabolism*; D019476:Insect Proteins / Q000737:chemistry / Q000145:classification / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D025941:Protein Interaction Mapping / Q000379:methods*; D040901:Proteomics / Q000379:methods; D015203:Reproducibility of Results; D016415:Sequence Alignment; D012882:Skin Tests
D000485:Allergens; D019476:Insect Proteins; D007073:Immunoglobulin E