{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,25]],"date-time":"2025-10-25T11:58:29Z","timestamp":1761393509341,"version":"build-2065373602"},"reference-count":64,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2000,5,1]],"date-time":"2000-05-01T00:00:00Z","timestamp":957139200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Lipids"],"published-print":{"date-parts":[[2000,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:italic>N<\/jats:italic>\u2010Acylphosphatidylethanolamines and <jats:italic>N<\/jats:italic>\u2010acylphosphatidylserines have been isolated from mammalian cells and have been associated with some tissue degenerative changes, although the relationship between their synthesis and the uncontrolled sequence of events that ends in irreversible tissue damage is not completely established. Our results show that monovalent and divalent cations induce aggregation and fusion of liposomes constituted by <jats:italic>N<\/jats:italic>\u2010palmitoylphosphatidylethanolamine (NPPE) and <jats:italic>N<\/jats:italic>\u2010palmitoylphosphatidylserine (NPPS). The effectiveness of cations to induce the aggregation of NPPE and NPPS liposomes is Ca<jats:sup>2+<\/jats:sup>&gt;Mg<jats:sup>2+<\/jats:sup>&gt;&gt;Na<jats:sup>+<\/jats:sup>. NPPS liposomes aggregate at lower concentrations of divalent cations than NPPE liposomes, but with sodium NPPE liposomes aggregate to a higher extent than NPPS liposomes. The reaction order for the aggregation processes depends on the lipid and the cation nature and range from 1.04 to 1.64. Dynamic light scattering shows an irreversible increase of the size of the aggregates in the presence of all cations tested. The irreversibility of the aggregation process and the intermixing of bilayer lipids, as studied by resonance energy transfer assay, suggest that fusion, rather than aggregation, occurs. The existence of a real fusion was demonstrated by the coalescence of the aqueous contents of both NPPS and NPPE liposomes in the presence of either monovalent or divalent cations. The different binding sensitivity of Ca<jats:sup>2+<\/jats:sup> to NPPS and NPPE liposomes, determined by \u015f potential measurements, agrees with the results obtained in the aggregation and fusion assays. Our results suggest that the synthesis <jats:italic>in vivo<\/jats:italic> of N\u2010acylated phospholipids can introduce important changes in membrane\u2010mediated processes.<\/jats:p>","DOI":"10.1007\/s11745-000-551-9","type":"journal-article","created":{"date-parts":[[2006,11,13]],"date-time":"2006-11-13T12:26:40Z","timestamp":1163420800000},"page":"513-524","source":"Crossref","is-referenced-by-count":16,"title":["Aggregation and fusion of vesicles composed of <i>N<\/i>\u2010palmitoyl derivatives of membrane phospholipids"],"prefix":"10.1002","volume":"35","author":[{"given":"Margarita","family":"Mora","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Faculty of Chemistry University of Barcelona Mart\u00ed i Franqu\u00e8s, 1\u201011 Barcelona 08028 Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ferran","family":"Mir","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Faculty of Chemistry University of Barcelona Mart\u00ed i Franqu\u00e8s, 1\u201011 Barcelona 08028 Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. Africa","family":"de Madariaga","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Faculty of Chemistry University of Barcelona Mart\u00ed i Franqu\u00e8s, 1\u201011 Barcelona 08028 Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. 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