Evaluation of differentially expressed proteins following serum exposure in avian pathogenic Escherichia coli

Cynthia D. Tyler, Cheryl F. Lichti, Alan B. Diekman, Steven L. Foley

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Colibacillosis, caused by avian pathogenic Escherichia coli (APEC), is an extraintestinal disease that causes great economic loss to the poultry industry each year. APEC must overcome host defenses, such as immune system components found in serum, in order to establish infection; however, the mechanism of such serum resistance has been elusive. In the present study, a proteomic approach was used to evaluate APEC proteins that were differentially expressed after exposure to chicken serum to identify specific proteins that may be involved in serum resistance of APEC isolates. Proteins were isolated and separated by two-dimensional (2D) gel electrophoresis, and 10 protein spots corresponding to differentially expressed proteins were chosen for sequencing using electrospray ionization tandem mass spectrometry. Eight proteins were identified among the spots, some of which have previously been associated with the virulence of E. coli. Significantly, an outer-membrane protein previously associated with serum resistance, OmpA, was among those proteins identified, further indicating that differential regulation of this protein may be involved in serum resistance. This study opens the door to future research using a proteomic approach to identify the key players in serum resistance of APEC.

Original languageEnglish (US)
Pages (from-to)23-27
Number of pages5
JournalAvian Diseases
Volume52
Issue number1
DOIs
StatePublished - Mar 2008
Externally publishedYes

Fingerprint

blood proteins
Blood Proteins
Escherichia coli
Serum
Proteins
proteins
Electrophoresis, Gel, Two-Dimensional
Proteomics
proteomics
Electrospray Ionization Mass Spectrometry
Escherichia coli Proteins
Poultry
Tandem Mass Spectrometry
outer membrane proteins
poultry industry
two-dimensional gel electrophoresis
Virulence
Chickens
Immune System
Industry

Keywords

  • 2D electrophoresis
  • Avian pathogenic Escherichia coli
  • Colibacillosis
  • Proteomics
  • Serum resistance
  • Virulence factors

ASJC Scopus subject areas

  • Cancer Research
  • Immunology
  • veterinary(all)

Cite this

Evaluation of differentially expressed proteins following serum exposure in avian pathogenic Escherichia coli. / Tyler, Cynthia D.; Lichti, Cheryl F.; Diekman, Alan B.; Foley, Steven L.

In: Avian Diseases, Vol. 52, No. 1, 03.2008, p. 23-27.

Research output: Contribution to journalArticle

Tyler, Cynthia D. ; Lichti, Cheryl F. ; Diekman, Alan B. ; Foley, Steven L. / Evaluation of differentially expressed proteins following serum exposure in avian pathogenic Escherichia coli. In: Avian Diseases. 2008 ; Vol. 52, No. 1. pp. 23-27.
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