Date

2009

Author

İşcan, Elvin

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Bordetella pertussis is the causative agent of whooping cough which is a worldwide acute respiratory disease that predominantly involves infants. Whooping cough is one of the ten most common causes of death from infectious diseases worldwide. The increased coverage of the primary pertussis vaccination (DaBT-IPA-Hib) decreased the incidence of disease in Turkey dramatically. However, in spite of the incidence decline, the circulation of B. pertussis has not yet been eliminated, and a change in the clinical spectrum and age-related incidence of the disease has been observed. On the other hand, in view of the moderate changes that have been observed in the genomic sequences of certain virulance factors over time, there are concerns about the gradual loss of the efficacy of the current pertussis vaccines as a result of antigenic drift and continuous selection of the least vaccine-sensitive clones. Proteomics deals with whole protein content (proteome) of cells as a function of space and time. Gel-based approach in proteomics involves two dimensional gel electrophoresis (2-DE) followed by peptide mass fingerprinting (PMF) employing matrix-assisted laser desorption/ionization (MALDI)-mass spectrometry (MS). Immunoproteomics which is a combination of gel based proteomics and Western blot analysis determines tumor-specific antigens as well as immunoreactive proteins of pathogens by combining proteomics with Western blot technique. Although immunoproteomics is a rather new research tool, it has been quite effective to determine the virulence factors of various pathogenic microorganisms. The present study aims at comparing immunoproteome of the standard B. pertussis strain “Tahoma I” with those of two other strains, namely “Saadet” and “Nursel”, which are the local isolates that have been preferred as the vaccine strains for many years in our country for their ability to provide a better protection. Of a total of 38 immunogenic proteins identified, 14 were shown to be the novel antigens for B. pertussis. Among 14 proteins, one was detected as immunogenic in only Tohama I strain where two proteins were specific for Nursel strain. Among the strains compared, Saadet strain had the highest antigenic variety, than the others.

Subject Keywords

Biochemistry.

URI

http://etd.lib.metu.edu.tr/upload/12611359/index.pdf
https://hdl.handle.net/11511/19207

Collections

Graduate School of Natural and Applied Sciences, Thesis