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Sakurai H, Nishimura K, Yamamoto S, Maruyama T, Tamura A. Molecular Design of pH-Responsive Helix Peptides That Can Damage Tumor Cells Selectively. ACS APPLIED BIO MATERIALS 2021; 4:2442-2452. [DOI: 10.1021/acsabm.0c01407] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Haruka Sakurai
- Graduate School of Science, Department of Chemistry, Kobe University, Nada, Kobe 657-8501, Japan
| | - Kanon Nishimura
- Graduate School of Engineering, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, Japan
| | - Shota Yamamoto
- Graduate School of Engineering, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, Japan
| | - Tatsuo Maruyama
- Graduate School of Engineering, Department of Chemical Science and Engineering, Kobe University, Nada, Kobe 657-8501, Japan
| | - Atsuo Tamura
- Graduate School of Science, Department of Chemistry, Kobe University, Nada, Kobe 657-8501, Japan
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Luo L, Wu Y, Liu C, Zou Y, Huang L, Liang Y, Ren J, Liu Y, Lin Q. Elaboration and characterization of curcumin-loaded soy soluble polysaccharide (SSPS)-based nanocarriers mediated by antimicrobial peptide nisin. Food Chem 2021; 336:127669. [PMID: 32758804 DOI: 10.1016/j.foodchem.2020.127669] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 07/16/2020] [Accepted: 07/23/2020] [Indexed: 12/18/2022]
Abstract
Curcumin was recently attracted great interest owing to its multiple bioactivities; however, the use of curcumin was hindered by its poor solubility and stability. In this study, curcumin-nisin-soy soluble polysaccharide nanoparticles (Cur-Nisin-SSPS-NPs, size = 118.76 nm) have been successfully elaborated to improve the application of curcumin. The formation of Cur-Nisin-SSPS-NPs was mediated by amphiphilic and positively charged nisin: SSPS encapsulated nisin, which was mainly driven by electrostatic attraction. And nisin-SSPS complex encapsulated curcumin mainly through hydrophobic interactions between nisin and curcumin. The encapsulation efficiency of curcumin (91.66%) in this novel nanocarriers was significantly higher than that in nanoparticles prepared by a single SSPS (31.82%) or nisin (41.69%), most likely because more hydrophobic regions of nisin were exposed after interacting with SSPS through electrostatic interaction. Consequently, this facile and green nanocarriers improved the solubility/dispersibility and stability of curcumin and nisin, as well as endowed SSPS-based nanoparticles with antioxidant and antimicrobial activities.
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Affiliation(s)
- Lijuan Luo
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Ying Wu
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Chun Liu
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Yuan Zou
- China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Technology & Business University, Beijing 100048, China; College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Liang Huang
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Ying Liang
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Jiali Ren
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yingli Liu
- College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Qinlu Lin
- National Engineering Laboratory for Rice and By-product Deep Processing, Hunan Key Laboratory of Processed Food For Special Medical Purpose, Hunan Key Laboratory of Edible Forestry Resources Safety and Processing Utilization, Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, School of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
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Zou Y, Pan R, Liu Y, Liu X, Chen X, Wang J, Wan Z, Guo J, Yang X. Effects of γ-zein peptides on lipid membrane organization: Quartz crystal microbalance with dissipation and Langmuir monolayer studies. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wilde M, Green RJ, Sanders MR, Greco F. Biophysical studies in polymer therapeutics: the interactions of anionic and cationic PAMAM dendrimers with lipid monolayers. J Drug Target 2017; 25:910-918. [DOI: 10.1080/1061186x.2017.1365877] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Marleen Wilde
- School of Pharmacy, University of Reading, Reading, UK
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6
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Liu C, Cheng F, Yang X. Fabrication of a Soybean Bowman-Birk Inhibitor (BBI) Nanodelivery Carrier To Improve Bioavailability of Curcumin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2426-2434. [PMID: 28249113 DOI: 10.1021/acs.jafc.7b00097] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Curcumin is a poorly water-soluble drug, and its oral bioavailability is very low. Here, a novel self-assembly nanoparticle delivery carrier has been successfully developed by using soybean Bowman-Birk inhibitor (BBI) to improve the solubility, bioaccessibility, and oral absorption of curcumin. BBI is a unique protein, which can be resistant to the pH range and proteolytic enzymes in the gastrointestinal tract (GIT), bioavailable, and not allergenic. The encapsulation efficiencies (EE) and the loading capacities (LC) of curcumin in the curcumin-loaded BBI nanoparticles (Cur-BBI-NPs, size = 90.09 nm, PDI = 0.103) were 86.17 and 10.31%, respectively. The in vitro bioaccessibility of Cur-BBI-NPs was superior to that of curcumin-loaded sodium caseinate (SC) nanoparticles (Cur-SC-NPs) (as control). Moreover, Cur-BBI-NPs significantly enhanced the bioavailability of curcumin in rats compared with Cur-SC-NPs, and the clathrin-mediated endocytosis pathway probably contributed to the favorable bioavailability of Cur-BBI-NPs, as revealed by the cellular uptake inhibition study.
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Affiliation(s)
- Chun Liu
- Research and Development Center of Food Proteins, School of Food Science and Engineering, South China University of Technology , Guangzhou 510640, People's Republic of China
| | - Fenfen Cheng
- Research and Development Center of Food Proteins, School of Food Science and Engineering, South China University of Technology , Guangzhou 510640, People's Republic of China
| | - Xiaoquan Yang
- Research and Development Center of Food Proteins, School of Food Science and Engineering, South China University of Technology , Guangzhou 510640, People's Republic of China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology , Guangzhou 510640, People's Republic of China
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Liu C, Cheng F, Sun Y, Ma H, Yang X. Structure-Function Relationship of a Novel PR-5 Protein with Antimicrobial Activity from Soy Hulls. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:948-59. [PMID: 26753535 DOI: 10.1021/acs.jafc.5b04771] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An alkaline isoform of the PR-5 protein (designated GmOLPc) has been purified from soybean hulls and identified by MALDI-TOF/TOF-MS. GmOLPc effectively inhibited in vitro the growth of Phytophthora soja spore and Pseudomonas syringae pv glycinea. The antimicrobial activity of GmOLPc should be mainly ascribed to its high binding affinity with vesicles composed of DPPG, (1,3)-β-D-glucans, and weak endo-(1,3)-β-D-glucanase activity. From the 3D models, predicted by the homology modeling, GmOLPc contains an extended negatively charged cleft. The cleft was proved to be a prerequisite for endo-(1,3)-β-D-glucanase activity. Molecular docking revealed that the positioning of linear (1,3)-β-D-glucans in the cleft of GmOLPc allowed an interaction with Glu83 and Asp101 that were responsible for the hydrolytic cleavage of glucans. Interactions of GmOLPc with model membranes indicated that GmOLPc possesses good surface activity which could contribute to its antimicrobial activity, as proved by the behavior of perturbing the integrity of membranes through surface hydrophobic amino acid residues (Phe89 and Phe94).
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Affiliation(s)
- Chun Liu
- Research and Development Center of Food Proteins, Department of Food Science and Technology, South China University of Technology , Guangzhou 510640, People's Republic of China
| | - Fenfen Cheng
- Research and Development Center of Food Proteins, Department of Food Science and Technology, South China University of Technology , Guangzhou 510640, People's Republic of China
| | - Yingen Sun
- Research and Development Center of Food Proteins, Department of Food Science and Technology, South China University of Technology , Guangzhou 510640, People's Republic of China
| | - Hongyu Ma
- College of Plant Protection, Nanjing Agricultural University , Nanjing 210095, People's Republic of China
| | - Xiaoquan Yang
- Research and Development Center of Food Proteins, Department of Food Science and Technology, South China University of Technology , Guangzhou 510640, People's Republic of China
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou 510640, People's Republic of China
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8
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The influence of rough lipopolysaccharide structure on molecular interactions with mammalian antimicrobial peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:197-209. [DOI: 10.1016/j.bbamem.2015.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/03/2015] [Accepted: 11/12/2015] [Indexed: 11/21/2022]
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9
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Bello G, Eriksson J, Terry A, Edwards K, Lawrence MJ, Barlow D, Harvey RD. Characterization of the aggregates formed by various bacterial lipopolysaccharides in solution and upon interaction with antimicrobial peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:741-751. [PMID: 25514503 DOI: 10.1021/la503267k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The biophysical analysis of the aggregates formed by different chemotypes of bacterial lipopolysaccharides (LPS) before and after challenge by two different antiendotoxic antimicrobial peptides (LL37 and bovine lactoferricin) was performed in order to determine their effect on the morphology of LPS aggregates. Small-angle neutron scattering (SANS) and cryogenic transmission electron microscopy (cryoTEM) were used to examine the structures formed by both smooth and rough LPS chemotypes and the effect of the peptides, by visualization of the aggregates and analysis of the scattering data by means of both mathematical approximations and defined models. The data showed that the structure of LPS determines the morphology of the aggregates and influences the binding activity of both peptides. The morphologies of the worm-like micellar aggregates formed by the smooth LPS were relatively unaltered by the presence of the peptides due to their pre-existing high degree of positive curvature being little affected by their association with either peptide. On the other hand, the aggregates formed by the rough LPS chemotypes showed marked morphological changes from lamellar structures to ordered micellar networks, induced by the increase in positive curvature engendered upon association with the peptides. The combined use of cryoTEM and SANS proved to be a very useful tool for studying the aggregation properties of LPS in solution at biologically relevant concentrations.
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Affiliation(s)
- Gianluca Bello
- Institute of Pharmaceutical Science, King's College London , London, U.K
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10
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Wang X, Yang P, Mondiot F, Li Y, Miller DS, Chen Z, Abbott NL. Interfacial ordering of thermotropic liquid crystals triggered by the secondary structures of oligopeptides. Chem Commun (Camb) 2015; 51:16844-7. [DOI: 10.1039/c5cc06996c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ordering at phospholipid-decorated interfaces of liquid crystals is influenced by the secondary structure of oligopeptides.
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Affiliation(s)
- Xiaoguang Wang
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Pei Yang
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Frederic Mondiot
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Yaoxin Li
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Daniel S. Miller
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Zhan Chen
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Nicholas L. Abbott
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
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12
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Yao X, Bunt C, Cornish J, Quek SY, Wen J. Preparation, Optimization and Characterization of Bovine Lactoferrin-loaded Liposomes and Solid Lipid Particles Modified by Hydrophilic Polymers Using Factorial Design. Chem Biol Drug Des 2014; 83:560-75. [DOI: 10.1111/cbdd.12269] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 11/17/2013] [Accepted: 11/29/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Xudong Yao
- School of Pharmacy; Faculty of Medical and Health Science; The University of Auckland; Auckland 1142 New Zealand
| | - Craig Bunt
- Faculty of Agriculture and Life Science; Lincoln University; Lincoln 7647 New Zealand
| | - Jillian Cornish
- School of Medicine; Faculty of Medical and Health Science; The University of Auckland; Auckland 1142 New Zealand
| | - Siew-Young Quek
- School of Chemical Science; The University of Auckland; Auckland 1142 New Zealand
| | - Jingyuan Wen
- School of Pharmacy; Faculty of Medical and Health Science; The University of Auckland; Auckland 1142 New Zealand
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Penetration of milk-derived antimicrobial peptides into phospholipid monolayers as model biomembranes. Biochem Res Int 2013; 2013:914540. [PMID: 24455264 PMCID: PMC3877611 DOI: 10.1155/2013/914540] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 08/27/2013] [Accepted: 08/27/2013] [Indexed: 12/18/2022] Open
Abstract
Three antimicrobial peptides derived from bovine milk proteins were examined with regard to penetration into insoluble monolayers formed with 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) or 1,2-dipalmitoyl-sn-glycero-3-phospho-rac-(1-glycerol) sodium salt (DPPG). Effects on surface pressure (Π) and electric surface potential (ΔV) were measured, Π with a platinum Wilhelmy plate and ΔV with a vibrating plate. The penetration measurements were performed under stationary diffusion conditions and upon the compression of the monolayers. The two type measurements showed greatly different effects of the peptide-lipid interactions. Results of the stationary penetration show that the peptide interactions with DPPC monolayer are weak, repulsive, and nonspecific while the interactions with DPPG monolayer are significant, attractive, and specific. These results are in accord with the fact that antimicrobial peptides disrupt bacteria membranes (negative) while no significant effect on the host membranes (neutral) is observed. No such discrimination was revealed from the compression isotherms. The latter indicate that squeezing the penetrant out of the monolayer upon compression does not allow for establishing the penetration equilibrium, so the monolayer remains supersaturated with the penetrant and shows an under-equilibrium orientation within the entire compression range, practically.
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Pillet F, Chopinet L, Formosa C, Dague E. Atomic Force Microscopy and pharmacology: from microbiology to cancerology. Biochim Biophys Acta Gen Subj 2013; 1840:1028-50. [PMID: 24291690 DOI: 10.1016/j.bbagen.2013.11.019] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 11/18/2013] [Accepted: 11/20/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND Atomic Force Microscopy (AFM) has been extensively used to study biological samples. Researchers take advantage of its ability to image living samples to increase our fundamental knowledge (biophysical properties/biochemical behavior) on living cell surface properties, at the nano-scale. SCOPE OF REVIEW AFM, in the imaging modes, can probe cells morphological modifications induced by drugs. In the force spectroscopy mode, it is possible to follow the nanomechanical properties of a cell and to probe the mechanical modifications induced by drugs. AFM can be used to map single molecule distribution at the cell surface. We will focus on a collection of results aiming at evaluating the nano-scale effects of drugs, by AFM. Studies on yeast, bacteria and mammal cells will illustrate our discussion. Especially, we will show how AFM can help in getting a better understanding of drug mechanism of action. MAJOR CONCLUSIONS This review demonstrates that AFM is a versatile tool, useful in pharmacology. In microbiology, it has been used to study the drugs fighting Candida albicans or Pseudomonas aeruginosa. The major conclusions are a better understanding of the microbes' cell wall and of the drugs mechanism of action. In cancerology, AFM has been used to explore the effects of cytotoxic drugs or as an innovative diagnostic technology. AFM has provided original results on cultured cells, cells extracted from patient and directly on patient biopsies. GENERAL SIGNIFICANCE This review enhances the interest of AFM technologies for pharmacology. The applications reviewed range from microbiology to cancerology.
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Affiliation(s)
- Flavien Pillet
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France
| | - Louise Chopinet
- CNRS, IPBS-UMR 5089, BP64182, 205 route de Narbonne, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France
| | - Cécile Formosa
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France; CNRS, UMR 7565, SRSMC, Vandoeuvre-lès-Nancy, France; Université de Lorraine, UMR 7565, Faculté de Pharmacie, Nancy, France
| | - Etienne Dague
- CNRS, LAAS, 7 avenue du colonel Roche, F-31077 Toulouse Cedex 4, France; Université de Toulouse, UPS, INSA, INP, ISAE, UT1, UTM, LAAS, ITAV, F-31077 Toulouse Cedex 4, France; CNRS; ITAV-USR 3505; F31106 Toulouse, France.
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Wydro P. The influence of cardiolipin on phosphatidylglycerol/phosphatidylethanolamine monolayers—Studies on ternary films imitating bacterial membranes. Colloids Surf B Biointerfaces 2013; 106:217-23. [DOI: 10.1016/j.colsurfb.2013.01.053] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 01/02/2013] [Accepted: 01/17/2013] [Indexed: 11/17/2022]
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Davidson PM, Critzer FJ, Taylor TM. Naturally Occurring Antimicrobials for Minimally Processed Foods. Annu Rev Food Sci Technol 2013; 4:163-90. [DOI: 10.1146/annurev-food-030212-182535] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- P. Michael Davidson
- Department of Food Science & Technology, University of Tennessee, Knoxville, Tennessee 37996-4591; ,
| | - Faith J. Critzer
- Department of Food Science & Technology, University of Tennessee, Knoxville, Tennessee 37996-4591; ,
| | - T. Matthew Taylor
- Department of Animal Science, Texas A&M University, College Station, Texas 77843;
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Haney EF, Nazmi K, Bolscher JGM, Vogel HJ. Structural and biophysical characterization of an antimicrobial peptide chimera comprised of lactoferricin and lactoferrampin. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1818:762-75. [PMID: 22155682 DOI: 10.1016/j.bbamem.2011.11.023] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 11/21/2011] [Accepted: 11/23/2011] [Indexed: 12/17/2022]
Abstract
Lactoferricin and lactoferrampin are two antimicrobial peptides found in the N-terminal lobe of bovine lactoferrin with broad spectrum antimicrobial activity against a range of Gram-positive and Gram-negative bacteria as well as Candida albicans. A heterodimer comprised of lactoferrampin joined to a fragment of lactoferricin was recently reported in which these two peptides were joined at their C-termini through the two amino groups of a single Lys residue (Bolscher et al., 2009, Biochimie 91(1):123-132). This hybrid peptide, termed LFchimera, has significantly higher antimicrobial activity compared to the individual peptides or an equimolar mixture of the two. In this work, the underlying mechanism behind the increased antibacterial activity of LFchimera was investigated. Differential scanning calorimetry studies demonstrated that all the peptides influenced the thermotropic phase behaviour of anionic phospholipid suspensions. Calcein leakage and vesicle fusion experiments with anionic liposomes revealed that LFchimera had enhanced membrane perturbing properties compared to the individual peptides. Peptide structures were evaluated using circular dichroism and NMR spectroscopy to gain insight into the structural features of LFchimera that contribute to the increased antimicrobial activity. The NMR solution structure, determined in a miscible co-solvent mixture of chloroform, methanol and water, revealed that the Lys linkage increased the helical content in LFchimera compared to the individual peptides, but it did not fix the relative orientations of lactoferricin and lactoferrampin with respect to each other. The structure of LFchimera provides insight into the conformation of this peptide in a membranous environment and improves our understanding of its antimicrobial mechanism of action.
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Affiliation(s)
- Evan F Haney
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
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Schmidtchen A, Ringstad L, Kasetty G, Mizuno H, Rutland MW, Malmsten M. Membrane selectivity by W-tagging of antimicrobial peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:1081-91. [DOI: 10.1016/j.bbamem.2010.12.020] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 12/16/2010] [Accepted: 12/20/2010] [Indexed: 10/18/2022]
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Imaging interactions of cationic antimicrobial peptides with model lipid monolayers using X-ray spectromicroscopy. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 40:805-10. [DOI: 10.1007/s00249-011-0690-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 02/11/2011] [Accepted: 02/16/2011] [Indexed: 10/18/2022]
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20
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Miyano M, Yamashita H, Sakurai T, Nakajima KI, Ito K, Misaka T, Ishimaru Y, Abe K, Asakura T. Surface plasmon resonance analysis on interactions of food components with a taste epithelial cell model. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:11870-11875. [PMID: 21038889 DOI: 10.1021/jf102573w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new device for evaluating the continuity of taste was developed with the use of surface plasmon resonance (SPR). The model of lingual cells was constructed with liposomes immobilized onto an L1 sensor chip for SPR. Using this device, we classified food components into three categories according to the sensorgram pattern and residual ratio on lipid bilayer. Samples in group A strongly interacted with lipid bilayer, those in group B poorly interacted, and those in group C belong to neither group A nor group B. Sweet proteins and gymnemic acids that prolonged sweet perception were categorized in group A. Almost all the carbohydrates investigated and aspartame, of which the taste perception does not continue, belonged to group B. This device made it possible to detect the interaction with lipid bilayer and dissected the mechanism of taste continuity.
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Affiliation(s)
- Motohiro Miyano
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
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