Zappacosta R, Semeraro M, Baroncini M, Silvi S, Aschi M, Credi A, Fontana A. Liposome destabilization by a 2,7-diazapyrenium derivative through formation of transient pores in the lipid bilayer.
SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010;
6:952-959. [PMID:
20333693 DOI:
10.1002/smll.200902306]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The effect of the luminescent heteroaromatic electron acceptor N,N'-dimethyl-2,7-diazapyrenium dichloride (DM-DAP(2+)) on the stability of 1-palmitoyl-2-oleoylphosphatydilcholine (POPC) liposomes is determined on the basis of the rate of release of different fluorescent probes entrapped within the liposome. The experiments show that DM-DAP(2+) exerts a substantial destabilizing action on the liposomal bilayer, particularly at low concentrations. Molecular dynamics simulations suggest that the activity of DM-DAP(2+) is related to its tendency to surround itself with water molecules, conceivably favoring the formation of transient pores across the bilayer.
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