Proteomics integrated with Escherichia coli vector-based vaccines and antigen microarrays reveals the immunogenicity of a surface sialidase-like protein of Propionibacterium acnes

• Published in: Proteomics. Clinical applications Vol. 2; no. 9; pp. 1234 - 1245
• Main Authors: Huang, Cheng-Po, Liu, Yu-Tsueng, Nakatsuji, Teruaki, Shi, Yang, Gallo, Richard R., Lin, Shwu-Bin, Huang, Chun-Ming
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.09.2008; WILEY‐VCH Verlag; Wiley
• Subjects: Antigen microarray; Bacteriology; Biological and medical sciences; Diverse techniques; Escherichia coli; Fundamental and applied biological sciences. Psychology; Immunogenicity; Microbiology; Molecular and cellular biology; Propionibacterium acnes; Sialidase-like protein; Vaccines, antisera, therapeutical immunoglobulins and monoclonal antibodies; Vector-based vaccine; Enzyme; Escherichia coli; Rodentia; Vaccine; Microarray; Glycosylases; Antigen; Vertebrata; Mammalia; Immunogenicity; Mouse; Glycosidases; Exo-α-sialidase; Sialidase-like protein; Proteomics; Propionibacteriaceae; Antigen microarray; Bacteria; Hydrolases; Actinomycetes; Propionibacterium acnes; Vector; Vector-based vaccine; Enterobacteriaceae
• ISSN: 1862-8346; 1862-8354
• DOI: 10.1002/prca.200780103

Proteomics is a powerful tool for the identification of proteins, which provides a basis for rational vaccine design. However, it is still a highly technical and time‐consuming task to examine a protein's immunogenicity utilizing traditional approaches. Here, we present a platform for effectively evaluating protein immunogenicity and antibody detection. A tetanus toxin C fragment (Tet‐c) was used as a representative antigen to establish this platform. A cell wall‐anchoring sialidase‐like protein (SLP) of Propionibacterium acnes was utilized to assess the efficacy of this platform. We constructed an Escherichia coli vector‐based vaccine by overexpressing Tet‐c or SLP in E. coli and utilized an intact particle of E. coli itself as a vaccine (E. coli Tet‐c or SLP vector). After ultraviolet (UV) irradiation, the E. coli vector‐based vaccines were administered intranasally into imprinting control region mice without adding exogenous adjuvants. For antibody detection, we fabricated antigen microarrays by printing with purified recombinant proteins including Tet‐c and SLP. Our results demonstrated that detectable antibodies were elicited in mice 6 weeks after intranasal administration of UV‐irradiated E. coli vector‐based vaccines. The antibody production of Tet‐c and SLP was significantly elevated after boosting. Notably, the platform with main benefits of using E. coli itself as a vaccine carrier provides a critical template for applied proteomics aimed at screening novel vaccine targets. In addition, the novel immunogenic SLP potentially serves as an antigen candidate for the development of vaccines targeting P. acnes‐associated diseases.