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Arg-Gly-Asp(RGD) peptides inhibit Streptococcus mitis to adhere to fibronectin
1Department of Periodontology, Nihon University School of Dentistry, Tokyo, Japan.
Abstract:
Fibronectin (Fn) is a multifunctional adhesive protein found on cell surfaces as well as in plasma. It is also believed to play an important role in bacterial adherence to host tissues. Molecular analyses of Fn have shown that the amino acid triplet arginine-glycine-aspartic acid (RGD) sequence functions as a binding site. We examined the role of the RGD sequence on bacterial adherence to Fn. The pretreatment of Streptococcus mitis with synthetic RGD-containing peptide reduced the number of bound bacteria to the Fn coated plates by 76%. In contrast, a control peptide containing the RGE sequence showed no inhibition. These data indicate that synthetic RGD peptides may be useful for the inhibition of bacterial adherence to Fn on host cell surfaces.
Insights
Synthetic RGD peptides significantly inhibit Streptococcus mitis bacterial adherence to fibronectin (Fn). This finding suggests RGD peptides could be a novel strategy to prevent bacterial adhesion to host tissues.
Area of Science:
- Biochemistry
- Microbiology
- Cell Biology
Background:
- Fibronectin (Fn) is a key adhesive protein involved in bacterial adherence to host tissues.
- The arginine-glycine-aspartic acid (RGD) sequence in Fn is a known binding site.
Purpose of the Study:
- To investigate the role of the RGD sequence in bacterial adherence to Fn.
- To evaluate the potential of synthetic RGD peptides in inhibiting bacterial adhesion.
Main Methods:
- Streptococcus mitis were pretreated with synthetic RGD-containing peptides.
- Bacterial binding to Fn-coated plates was quantified.
- A control peptide with an RGE sequence was used for comparison.
Main Results:
- Pretreatment with RGD peptides reduced bacterial binding to Fn by 76%.
- The control RGE peptide showed no significant inhibition of bacterial adherence.
Conclusions:
- The RGD sequence is crucial for bacterial adherence to fibronectin.
- Synthetic RGD peptides demonstrate potential as inhibitors of bacterial adherence to host surfaces.