Abstract
Pan-allergens can contribute to severity and perpetuation of allergic
diseases, as a result of leading to IgE-medicated poly-sensitization and
cross-reactivity to human self-antigens. Cyclophilins are well-known
pan-allergens of various groups of cross-reactive allergens. CyPs have
been identified with five classic CyP isoforms (CyPA, B, C, D and E). In
the present study, the physicochemical and immunologic characteristics
of CyPs were predict by bioinformatics and immunoinformatics approaches.
The results indicated that CyPA family possesses multiple identified
allergens. CyPE showed closer evolutionary relationship and high
sequence identity with allergenic CyPA and the structure and
antigenicity of CyPE were conserved significantly compared with
allergenic CyPA. To verify results of In silico analysis,CyPE from HMD
were successfully constructed and purified. ELISA resuls indicated that
2/14 patient serum had positive reactions to CyPE. CyPE is low
antigenicity but sufficient to induced significant airway inflammation
in mouse models and IgE, IgG1, eosinophil infiltration, IL-4 and
co-stimulatory molecules of CyPE were markedly lower levels than Der f
29. Structure and immunoinformatics analysis demonstrated that
RNA-binding motif of CyPE may reduce the immunogenicity of CyPE and
structure variation of B-cell epitopes is the reason why CyPB is no IgE
activity. This work is of significance in the diagnosis and treatment of
allergy.