Probing electrophysiological activity of amphiphilic Dynorphin A in planar neutral membranes reveals both ion channel-like activity and neuropeptide translocation
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Scholar |
Other documents of the author: Alvero González, Laidy Maidel; Perini, Deborah Aurora; Queralt-Martín, María; Peralvarez-Marin, Alex; Viñas, Clara; Alcaraz, Antonio
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
comunitat-uji-handle4:
INVESTIGACIONMetadata
Title
Probing electrophysiological activity of amphiphilic Dynorphin A in planar neutral membranes reveals both ion channel-like activity and neuropeptide translocationAuthor (s)
Date
2023-12Publisher
ElsevierISSN
1567-5394Bibliographic citation
L. M. Alvero-Gonzalez, D. A. Perini, M. Queralt-Martín, A. Perálvarez-Marín, C. Viñas, A. Alcaraz, Probing electrophysiological activity of amphiphilic Dynorphin A in planar neutral membranes reveals both ion channel-like activity and neuropeptide translocation. Bioelectrochemistry. 154 (2023) 108527, https://doi.org/10.1016/j.bioelechem.2023.108527.Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S1567539423001640Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
Dynorphin A (DynA) is an endogenous neuropeptide that besides acting as a ligand of the κ-opioid receptor, presents some non-opioid pathophysiological properties associated to its ability to induce cell permeability ... [+]
Dynorphin A (DynA) is an endogenous neuropeptide that besides acting as a ligand of the κ-opioid receptor, presents some non-opioid pathophysiological properties associated to its ability to induce cell permeability similarly to cell-penetrating peptides (CPPs). Here, we use electrophysiology experiments to show that amphiphilic DynA generates aqueous pores in neutral membranes similar to those reported previously in charged membranes, but we also find other events thermodynamically incompatible with voltage-driven ion channel activity (i.e. non-zero currents with no applied voltage in symmetric salt conditions, reversal potentials that exceed the theoretical limit for a given salt concentration gradient). By comparison with current traces generated by other amphiphilic molecule known to spontaneously cross membranes, we hypothesize that DynA could directly translocate across neutral bilayers, a feature never observed in charged membranes following the same electrophysiological protocol. Our findings suggest that DynA interaction with the cellular membrane is modulated by the lipid charge distribution, enabling either passive ionic transport via membrane remodeling and pore formation or by peptide direct internalization independent of cellular transduction pathways. [-]
Is part of
Bioelectrochemistry, 2023, vol. 154Funder Name
Ministerio de Ciencia, Innovación y Universidades | Universitat Jaume I
Funder ID
http://dx.doi.org/10.13039/501100011033
Project code
MICIU/ICTI2017-2020/PID2019-108434GB-I00 | MICIU/IJC2018-035283-I | MICIU/ICTI2017-2020/PID2020-120222GB-I00 | UJI-B2022-4 | UJI-A2020-21
Project title or grant
Estudio biofísico de los mecanismos de permeabilización de membranas inducidos por canales iónicos | Determinantes moleculares en canales iónicos: desde formación de poros a identificación de fármacos basada en ligandos
Rights
info:eu-repo/semantics/openAccess
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- FCA_Articles [511]