ArticleThe Journal of membrane biology2026
Peptide-Assisted Membrane Permeabilization: Effects of Waveform Polarity, Inter-Monopulse Interval, and Surface Charge in Red Blood Cells and Planar Lipid Bilayers.
Article in The Journal of membrane biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Permeabilization of biomembranes by polycationic peptides is known to depend on the membrane potential, although the exact mechanism of this process is not yet completely defined, to be effectively controlled. We quantified peptide-assisted permeabilization of red blood cells (RBCs) using a custom system that delivered microsecond bipulses configured as bimonopolar (BMP; same polarity) or bipolar (BP; opposite polarity), varying the inter-monopulse interval ([Formula: see text]). In RBC suspensions, bulk light transmittance at 650 nm showed that BMP yielded higher permeabilization effect than BP at short [Formula: see text], whereas lengthening [Formula: see text] mitigated bipolar cancellation and increased BP responses. Membrane surface charge modulation by moderate concentrations of deoxycholate and spermine increased and decreased, respectively, membrane permeabilization effects of polycationic peptides. Complementary measurements in planar lipid bilayers (BLMs) under an applied command voltage ([Formula: see text]) with polarity alternation showed remarkable conduction at negative bias, essentially decreased in the presence of 1 mM Mg
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