Recombinant outer membrane protein A fragments protect against Escherichia coli meningitis

Wen Shyang Hsieh, Yi Yuan Yang, Hsin Yi Yang, Yu Shan Huang, Hsueh Hsia Wu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background: Although the mortality rates have decreased over the past few decades, neonatal meningitis is still a severe disease with high morbidity. Moreover, approximately 40% of survivors exhibit neurological sequelae. Escherichia coli is the major Gram-negative bacterial pathogen in neonatal meningitis. The N-terminal β-barrel domain of the outer membrane protein A (OmpA) of E. coli is essential for effective protein conformation and function and contains four surface-exposed hydrophilic loops. In this study, we expressed different fragments of the four ring structures of the N-terminal domain, and investigated whether these recombinant OmpA fragments can protect mice from death after E. coli infection. Methods: We expressed the recombinant proteins of the following OmpA fragments by using molecular cloning of Loop 1-2, Loop 1-3, Loop 1-4, Loop 2-3, Loop 2-4, and Loop 3-4. Animal experiments were subsequently performed to investigate the effects of these recombinant OmpA fragments on the survival of C57BL/6 mice after intracerebral E. coli RS218 administration. Results: This study demonstrated that the recombinant Loop 1-3, Loop 2-3, and Loop 2-4 fragments of OmpA can protect mice from intracerebral E. coli infection. Conclusion: In bacterial meningitis, although antibiotic therapy is the first choice for management, neurological complications can seldom be averted. Based on the results of the present study, we intend to establish an effective therapeutic application for E. coli meningitis.

Original languageEnglish
Pages (from-to)329-334
JournalJournal of Microbiology, Immunology and Infection
Volume49
Issue number3
DOIs
Publication statusPublished - Jun 1 2016

Fingerprint

Escherichia coli Meningitis
Escherichia coli Infections
Escherichia coli
Meningitis
Protein Conformation
Bacterial Meningitides
Molecular Cloning
Inbred C57BL Mouse
Recombinant Proteins
Survivors
OMPA outer membrane proteins
Anti-Bacterial Agents
Morbidity
Mortality
Therapeutics

Keywords

  • Escherichia coli
  • Bacterial meningitis
  • Outer membrane protein A (OmpA)

ASJC Scopus subject areas

  • Microbiology (medical)
  • Immunology and Allergy
  • Immunology and Microbiology(all)
  • Infectious Diseases

Cite this

Recombinant outer membrane protein A fragments protect against Escherichia coli meningitis. / Hsieh, Wen Shyang; Yang, Yi Yuan; Yang, Hsin Yi; Huang, Yu Shan; Wu, Hsueh Hsia.

In: Journal of Microbiology, Immunology and Infection, Vol. 49, No. 3, 01.06.2016, p. 329-334.

Research output: Contribution to journalArticle

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