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Regulation of capsule in Neisseria meningitidis

Yih-Ling Tzeng1, Jennifer Thomas1, David S Stephens1

  • 1a Department of Medicine , Emory University School of Medicine, Woodruff Health Sciences Center , Atlanta , GA , USA.

Critical Reviews in Microbiology
|June 20, 2015
PubMed

Insights

Neisseria meningitidis capsule expression is crucial for disease and carriage. Its complex regulation impacts virulence, immune evasion, and vaccine development strategies.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Immunology

Background:

  • Neisseria meningitidis capsule is a key virulence factor and vaccine target.
  • Capsule expression is essential for invasive disease but lost during carriage.

Purpose of the Study:

  • To elucidate the complex regulatory mechanisms governing Neisseria meningitidis capsule expression.
  • To understand how capsule regulation influences pathogenesis, diagnostics, and vaccine strategies.

Main Methods:

  • Analysis of the cps locus and its regulatory elements.
  • Investigating transcriptional regulation via IS elements, two-component systems (MisR/MisS), and RNA thermoregulation.
  • Examining mechanisms of phase variation and capsule switching.

Main Results:

  • Capsule expression is tightly controlled at transcriptional and post-transcriptional levels.
  • Phase variation and capsule switching are mediated by genetic elements and recombination.
  • Regulatory mechanisms allow adaptation for virulence, immune escape, and carriage.

Conclusions:

  • Understanding meningococcal capsule regulation is vital for controlling invasive disease.
  • Knowledge of these mechanisms informs the development of novel diagnostics and vaccines.
  • Targeting capsule regulation could offer new therapeutic and preventative strategies.
Keywords:
Bacterial virulence regulationcapsular polysaccharidescapsule switchingmeningococcal diseases

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