PMID- 1321622 OWN - NLM STAT- MEDLINE DCOM- 19920820 LR - 20181130 IS - 0158-5231 (Print) IS - 0158-5231 (Linking) VI - 26 IP - 6 DP - 1992 May TI - New chemotactic peptide analogs with high biological activity for human neutrophils. PG - 1125-35 AB - As a part of a research programme aimed at studying structure activity relationships in the field of chemotactic peptides, modified analogs of the chemoattractant N-formyl-L-methionyl-L-leucyl-L-phenylalanine (FMLP) were examined for their capacity to activate several functions of human neutrophils. 4-Aminotetrahydrothiopyran-4carboxylic acid (Thp) and 2-aminoindane-2-carboxylic acid (Ain) were chosen as achiral, conformationally restricted amino acids suitable for mimicking the external Met and Phe residues of FMLP-OMe. The replacement of both produces a high locomotion activity, greater than the parent peptide; in contrast, the two Thp-containing analogs induce neither superoxide production nor lysozyme release. From these results we can hypothesize two different signal transduction systems: one which provides for movement, the other for superoxide generation and granule enzyme release. FAU - Spisani, S AU - Spisani S AD - Istituto di Chimica Biologica, Universita degli Studi di Ferrara, Italy. FAU - Traniello, S AU - Traniello S FAU - Giuliani, A L AU - Giuliani AL FAU - Torrini, I AU - Torrini I FAU - Pagani Zecchini, G AU - Pagani Zecchini G FAU - Paglialunga Paradisi, M AU - Paglialunga Paradisi M FAU - Gavuzzo, E AU - Gavuzzo E FAU - Mazza, F AU - Mazza F FAU - Pochetti, G AU - Pochetti G FAU - Lucente, G AU - Lucente G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Australia TA - Biochem Int JT - Biochemistry international JID - 8100311 RN - 0 (Receptors, Formyl Peptide) RN - 0 (Receptors, Immunologic) RN - 11062-77-4 (Superoxides) RN - 59880-97-6 (N-Formylmethionine Leucyl-Phenylalanine) RN - EC 3.2.1.17 (Muramidase) SB - IM MH - Amino Acid Sequence MH - Chemotaxis, Leukocyte/drug effects MH - Humans MH - In Vitro Techniques MH - Molecular Sequence Data MH - Molecular Structure MH - Muramidase/metabolism MH - N-Formylmethionine Leucyl-Phenylalanine/*analogs & derivatives/chemistry/pharmacology MH - Neutrophils/*drug effects/physiology MH - Protein Conformation MH - Receptors, Formyl Peptide MH - Receptors, Immunologic/drug effects/physiology MH - Signal Transduction/drug effects MH - Superoxides/metabolism EDAT- 1992/05/01 00:00 MHDA- 1992/05/01 00:01 CRDT- 1992/05/01 00:00 PHST- 1992/05/01 00:00 [pubmed] PHST- 1992/05/01 00:01 [medline] PHST- 1992/05/01 00:00 [entrez] PST - ppublish SO - Biochem Int. 1992 May;26(6):1125-35.