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Leite NB, Martins DB, Alvares DS, Cabrera MPDS. Quercetin induces lipid domain-dependent permeability. Chem Phys Lipids 2021; 242:105160. [PMID: 34808124 DOI: 10.1016/j.chemphyslip.2021.105160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 01/08/2023]
Abstract
Quercetin is a polyphenolic molecule with a broad spectrum of biological activities derived from its antioxidant property. Its mechanism of action has been explained by its binding and/or interference with enzymes, receptors, transporters and signal transduction systems. Since these important mechanisms generally occur in membrane environments, within and through lipid bilayers, investigating the biophysical properties related to the diversity of lipid compositions of cell membranes may be the key to understanding the role of cell membrane in these processes. In this work, we explored the interaction of quercetin with model membranes of different lipid compositions to access the importance of lipid phases and bilayer homogeneity to the action of quercetin and contribute to the understanding of quercetin multiple activities. Analysis of the influence of quercetin on the morphology and permeability of GUVs, the rigidity of LUVs and affinity to these vesicles showed that quercetin strongly partitions to the more homogeneous environments, but significantly permeates and modifies the more heterogeneous where liquid-disordered, liquid-ordered and solid phases coexist. Our findings support the condensing effect of quercetin, which is observed through a significant rigidifying of bilayers containing 40% cholesterol, but much less evidenced when it is reduced to 20% or in its absence. Nevertheless, the presence of sphingomyelin in the ternary system led to a more heterogeneous bilayer with the formation of micrometric and probably also nanometric domains, which coalesce in the presence of quercetin. This observation together with increased permeability points to an insertion effect.
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Affiliation(s)
- Natália Bueno Leite
- Departamento de Química e Ciências Ambientais, Universidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas (IBILCE), Câmpus São José do Rio Preto, SP, Brazil.
| | - Danubia Batista Martins
- Departamentode Física, Universidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas (IBILCE), Câmpus São José do Rio Preto, SP, Brazil
| | - Dayane S Alvares
- Departamentode Física, Universidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas (IBILCE), Câmpus São José do Rio Preto, SP, Brazil
| | - Marcia Perez Dos Santos Cabrera
- Departamento de Química e Ciências Ambientais, Universidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas (IBILCE), Câmpus São José do Rio Preto, SP, Brazil; Departamentode Física, Universidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas (IBILCE), Câmpus São José do Rio Preto, SP, Brazil
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Martins IBS, Viegas TG, Dos Santos Alvares D, de Souza BM, Palma MS, Ruggiero Neto J, de Araujo AS. The effect of acidic pH on the adsorption and lytic activity of the peptides Polybia-MP1 and its histidine-containing analog in anionic lipid membrane: a biophysical study by molecular dynamics and spectroscopy. Amino Acids 2021; 53:753-767. [PMID: 33890127 DOI: 10.1007/s00726-021-02982-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Accepted: 04/12/2021] [Indexed: 01/09/2023]
Abstract
Antimicrobial peptides (AMPs) are part of the innate immune system of many species. AMPs are short sequences rich in charged and non-polar residues. They act on the lipid phase of the plasma membrane without requiring membrane receptors. Polybia-MP1 (MP1), extracted from a native wasp, is a broad-spectrum bactericide, an inhibitor of cancer cell proliferation being non-hemolytic and non-cytotoxic. MP1 mechanism of action and its adsorption mode is not yet completely known. Its adsorption to lipid bilayer and lytic activity is most likely dependent on the ionization state of its two acidic and three basic residues and consequently on the bulk pH. Here we investigated the effect of bulk acidic (pH 5.5) and neutral pH (7.4) solution on the adsorption, insertion, and lytic activity of MP1 and its analog H-MP1 to anionic (7POPC:3POPG) model membrane. H-MP1 is a synthetic analog of MP1 with lysines replaced by histidines. Bulk pH changes could modulate this peptide efficiency. The combination of different experimental techniques and molecular dynamics (MD) simulations showed that the adsorption, insertion, and lytic activity of H-MP1 are highly sensitive to bulk pH in opposition to MP1. The atomistic details, provided by MD simulations, showed peptides contact their N-termini to the bilayer before the insertion and then lay parallel to the bilayer. Their hydrophobic faces inserted into the acyl chain phase disturb the lipid-packing.
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Affiliation(s)
- Ingrid Bernardes Santana Martins
- Department of Physics, IBILCE, UNESP-São Paulo State University, Cristóvão Colombo, 2265-Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
| | - Taisa Giordano Viegas
- Department of Physics, IBILCE, UNESP-São Paulo State University, Cristóvão Colombo, 2265-Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
| | - Dayane Dos Santos Alvares
- Department of Physics, IBILCE, UNESP-São Paulo State University, Cristóvão Colombo, 2265-Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil
| | - Bibiana Monson de Souza
- Department of Basic and Applied Biology, Institute of Biosciences, UNESP-São Paulo State University, Rio Claro, SP, Brazil
| | - Mário Sérgio Palma
- Department of Basic and Applied Biology, Institute of Biosciences, UNESP-São Paulo State University, Rio Claro, SP, Brazil
| | - João Ruggiero Neto
- Department of Physics, IBILCE, UNESP-São Paulo State University, Cristóvão Colombo, 2265-Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil.
| | - Alexandre Suman de Araujo
- Department of Physics, IBILCE, UNESP-São Paulo State University, Cristóvão Colombo, 2265-Jardim Nazareth, São José do Rio Preto, SP, 15054-000, Brazil.
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Antimicrobial peptides - Advances in development of therapeutic applications. Life Sci 2020; 260:118407. [PMID: 32931796 PMCID: PMC7486823 DOI: 10.1016/j.lfs.2020.118407] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 02/07/2023]
Abstract
The severe infection is becoming a significant health problem which threaten the lives of patients and the safety and economy of society. In the way of finding new strategy, antimicrobial peptides (AMPs) - an important part of host defense family, emerged with tremendous potential. Up to date, huge numbers of AMPs has been investigated from both natural and synthetic sources showing not only the ability to kill microbial pathogens but also propose other benefits such as wound healing, anti-tumor, immune modulation. In this review, we describe the involvements of AMPs in biological systems and discuss the opportunity in developing AMPs for clinical applications. In the detail, their properties in antibacterial activity is followed by their application in some infection diseases and cancer. The key discussions are the approaches to improve biological activities of AMPs either by modifying chemical structure or incorporating into delivery systems. The new applications and perspectives for the future of AMPs would open the new era of their development.
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Miasaki KMF, Wilke N, Neto JR, Alvares DS. N-terminal acetylation of a mastoparan-like peptide enhances PE/PG segregation in model membranes. Chem Phys Lipids 2020; 232:104975. [PMID: 32949566 DOI: 10.1016/j.chemphyslip.2020.104975] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/18/2022]
Abstract
The synthetic peptides L1A and its acetylated analog (acL1A) display potent Gram-negative bactericidal activities without being hemolytic. We have gathered evidence that the N-terminal acetylation of L1A enhances the lytic activity in anionic vesicles with high capability to insert into and disturb lipid packing of model membranes. Here, the impact of L1A and acL1A was evaluated on a model membrane that mimics the cytoplasmic membrane of Gram-negative bacteria, which is rich in phosphatidylethanolamine (PE) and phosphatidylglycerol (PG), using 3:1 mixture of POPE/DOPG and a variety of techniques. We followed peptide adsorption and penetration by zeta potential determination of large unilamellar vesicles, accessibility of tryptophan residue to acrylamide by quenching assays, and Gibbs isotherms. The secondary structure of the peptide on the membranes was assessed using circular dichroism. Peptide mixing ability with the lipids and phase segregation was assessed by the observation of Langmuir monolayers with fluorescence microscopy, as well as with differential scanning calorimetry thermograms of multilamellar vesicles. All in all, the results indicate that both peptides adsorb and penetrate POPE/DOPG membranes with similar affinities, decreasing the surface charge, and adopting alpha structures. Both peptides mix with DOPG and demix from POPE, and consequently, persist at the interface to larger surface pressures in the presence of PG than in pure PE monolayers. This selective degree of mixing of the peptides with PE and PG leads to peptide-induced segregation of PG from PE, being the less charged peptide, acL1A, able to segregate the lipids more efficiently.
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Affiliation(s)
- Kenneth M F Miasaki
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil
| | - Natalia Wilke
- Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina; Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), CONICET, Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria, X5000HUA, Argentina
| | - João Ruggiero Neto
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil
| | - Dayane S Alvares
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil.
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Liu B, Zhang Q, Zhao Y, Ren L, Yuan X. Trehalose-functional glycopeptide enhances glycerol-free cryopreservation of red blood cells. J Mater Chem B 2019; 7:5695-5703. [DOI: 10.1039/c9tb01089k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Arginine- and trehalose-modified ε-polylysine (ε-PL) demonstrated a high synergistic function with trehalose for RBC cryopreservation.
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Affiliation(s)
- Bo Liu
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
| | - Qifa Zhang
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
| | - Yunhui Zhao
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
| | - Lixia Ren
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
| | - Xiaoyan Yuan
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
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