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Berberine inhibits HEp-2 cell invasion induced by Chlamydophila pneumoniae infection

Li Jun Zhang1, Li Jun Zhang, Wei Quan

  • 1Department of Pathophysiology, Basic Medical School of Tianjin Medical University, Tianjin, 300070, P. R. China.

Journal of Microbiology (Seoul, Korea)
|November 10, 2011
PubMed

Insights

Berberine effectively inhibits Chlamydophila (Chlamydia) pneumoniae infection-induced HEp-2 cell invasion. This natural compound suppresses bacterial adhesion and migration without altering matrix metalloproteinase-1 or -9 expression.

Area of Science:

  • Microbiology
  • Cell Biology
  • Pharmacology

Background:

  • Chlamydophila (Chlamydia) pneumoniae is an obligate intracellular bacterium that causes respiratory infections.
  • HEp-2 cells are commonly used in research to study cellular responses to pathogens.
  • Understanding host-pathogen interactions is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the inhibitory effects of berberine on C. pneumoniae-induced HEp-2 cell invasion.
  • To explore the underlying mechanisms by which berberine affects bacterial entry and cellular processes.

Main Methods:

  • Matrigel invasion assays were used to quantify HEp-2 cell invasion by C. pneumoniae.
  • Cell adhesion assays assessed the binding of HEp-2 cells to Matrigel.
  • Cell migration assays measured the movement of HEp-2 cells.
  • Expression levels of matrix metalloproteinase-1 (MMP-1) and MMP-9 were analyzed.

Main Results:

  • C. pneumoniae infection significantly increased HEp-2 cell invasion, adhesion, and migration.
  • Berberine (50 μM) markedly suppressed C. pneumoniae-induced HEp-2 cell invasion, adhesion, and migration.
  • No significant changes in MMP-1 and MMP-9 expression were observed in infected cells or after berberine treatment.

Conclusions:

  • Berberine inhibits C. pneumoniae infection-induced HEp-2 cell invasion.
  • The inhibitory mechanism involves the suppression of HEp-2 cell adhesion and migration.
  • Berberine does not affect C. pneumoniae-induced invasion by altering MMP-1 and MMP-9 expression.

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