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Inhibition of microbial adherence by sphinganine.

D J Bibel1, R Aly, H R Shinefield

  • 1Department of Dermatology, University of California, San Francisco 94143-0536.

Canadian Journal of Microbiology
|September 1, 1992
PubMed
Summary
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Sphinganine, a sphingosine, significantly reduces bacterial adherence to human cells, indicating potential as an antimicrobial therapeutic. This molecule shows a dual role in regulating cellular activities and combating infections.

Area of Science:

  • Biochemistry
  • Microbiology
  • Cell Biology

Background:

  • Sphingolipids and their derivatives, sphingosines, are crucial in cellular signaling and possess antimicrobial properties against Gram-positive bacteria.
  • Sphingosine metabolism and function are integral to eukaryotic cell physiology.

Purpose of the Study:

  • To investigate the effect of sphinganine on the adherence of Streptococcus mitis and Staphylococcus aureus to host cells.
  • To explore the potential of sphingosines as therapeutic agents for infectious diseases.

Main Methods:

  • Bacteria (Strep. mitis, Staph. aureus) and host cells (buccal epithelial, nasal mucosal) were incubated with varying concentrations of sphinganine.
  • Bacterial adherence was quantified after incubation periods at 37°C.
  • Statistical analysis was performed to determine the significance of observed changes.

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Main Results:

  • Sphinganine pretreatment significantly reduced the adherence of Staph. aureus by up to 60% and Strep. mitis by up to 73%.
  • Pretreatment of buccal cells with sphinganine increased adherence by 14% at a specific concentration, suggesting complex regulatory effects.
  • Results demonstrated a dose-dependent inhibition of bacterial adherence by sphinganine.

Conclusions:

  • Sphingosine, specifically sphinganine, exhibits a dual role in modulating cellular interactions, inhibiting bacterial adherence while potentially enhancing host cell interactions.
  • These findings highlight the therapeutic potential of sphingosines in managing bacterial infections due to their impact on bacterial adhesion.