| Autor: |
Geetha, C., Venkatesh, S. G., Bingle, L., Bingle, C. D., Gorr, S.-U. |
| Předmět: |
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| Zdroj: |
Journal of Dental Research; Feb2005, Vol. 84 Issue 2, p149-153, 5p, 2 Diagrams, 1 Chart, 1 Graph |
| Abstrakt: |
Parotid secretory protein (PSP) and palate-lung-nasal epithelium clone (PLUNC) are novel secretory proteins that are expressed in the oral cavity and upper airways. Both proteins are related to bactericidal/permeability increasing protein (BPI). Cationic peptides derived from BPI exhibit anti-inflammatory activity. To test if PSP (C20orf70 gene product) also contains anti-inflammatory peptides, we designed 3 cationic peptides based on the predicted structure of PSP and known active regions of BPI. Each peptide inhibited the lipopolysaccharide (LPS)-stimulated secretion of TNFalpha from RAW 264.7 macrophage cells. At 200 microg/mL, the peptide GK-7 exhibited inhibition similar to that achieved with 10 microg/mL of polymyxin B. PSP peptides directly inhibited the binding of LPS to LPS-binding protein. The cationic peptide Substance P had no inhibitory effect in these assays, confirming the specificity of the PSP peptides. These findings suggest that PSP peptides can serve as templates for the design of novel anti-inflammatory peptides. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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