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Pubmed ID :18636221
Publication Date : //

Synthesis and bioactivity of chemotactic tetrapeptides: fMLF-OMe analogues incorporating spacer aminoacids at the lateral positions.


A small library of N-For and N-Boc tetrapeptidic analogues of the chemotactic tripeptide For-Met-Leu-Phe-OMe (fMLF-OMe), obtained by incorporating three different spacer aminoacids (Gly, betaAla and Pro) between the native residues of Met and Leu (N-For- and N-Boc-Met-Xaa-Leu-Phe-OMe; Xaa2 series) and Leu and Phe (N-For- and N-Boc-Met-Leu-Xaa-Phe-OMe; Xaa3 series), have been synthesized and examined for their biological activity as agonists and antagonists. Chemotaxis, lysozyme release and superoxide anion production have been measured. All the N-For analogues maintain good to moderate chemotactic activity with the betaAla3 15 model reaching the maximum value. All the N-Boc tetrapeptides are efficient chemotactic antagonists. Conversely, with the exception of the moderate antagonistic activity exhibited by the N-Boc Xaa2 models against lysozyme release, all the other N-Boc analogues do not show significant activity against both superoxide anion and lysozyme release.

Authors : Lucente Gino , Giordano Cesare , Sansone Anna , Torino Domenica , Spisani Susanna ,

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