Proteomic expression profiles of virulent and avirulent strains of Listeria monocytogenes isolated from macrophages

Janet R. Donaldson, Bindu Nanduri, Joseph R. Pittman, Sumalee Givaruangsawat, Shane C. Burgess, Mark L. Lawrence

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Listeria monocytogenes is able to survive and proliferate within macrophages. In the current study, the ability of three L. monocytogenes strains (serovar 1/2a strain EGDe, serovar 4b strain F2365, and serovar 4a strain HCC23) to proliferate in the murine macrophage cell line J774.1 was analyzed. We found that the avirulent strain HCC23 was able to initiate an infection but could not establish prolonged infection within the macrophages. By contrast, strains EGDe and F2365 proliferated within macrophages for at least 7. h. We further analyzed these strains by comparing their protein expression profiles at 0. h, 3. h, and 5. h post-infection using multidimensional protein identification technology coupled with electrospray ionization tandem mass spectrometry. Our results indicated that similar metabolic and cell wall associated proteins were expressed by all three strains at 3. h post-infection. However, increased expression of stress response and DNA repair proteins was associated with the ability to proliferate in macrophages at 5. h post-infection. By comparing the protein expression patterns of these three L. monocytogenes strains during intracellular growth in macrophages, we were able to detect biological differences that may determine the ability of L. monocytogenes to survive in macrophages.

Original languageEnglish (US)
Pages (from-to)1906-1917
Number of pages12
JournalJournal of Proteomics
Issue number10
StatePublished - Sep 6 2011


  • Intracellular
  • Listeria monocytogenes
  • Macrophages
  • Proteomics

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry


Dive into the research topics of 'Proteomic expression profiles of virulent and avirulent strains of Listeria monocytogenes isolated from macrophages'. Together they form a unique fingerprint.

Cite this