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Mortara L, Mukhina T, Chaimovich H, Brezesinski G, van der Vegt NFA, Schneck E. Anion Competition at Positively Charged Surfactant Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6949-6961. [PMID: 38502024 DOI: 10.1021/acs.langmuir.3c04003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Interactions of anions with hydrophobic surfaces of proteins and water-soluble polymers depend on the ability of the ions to shed their hydration shells. At positively charged surfactant monolayers, the interactions of anions are less well understood. Due to the interplay of electrostatic surface forces, hydration effects, and ion-ion interactions in the electrostatic double layer, a comprehensive microscopic picture remains elusive. Herein, we study the interactions of chloride, bromide, and a mixture of these two anions at the aqueous interface of dihexadecyldimethylammonium (DHDA+) and dioctadecyldimethylammonium (DODA+) cationic monolayers. Using molecular dynamics simulations and three surface-sensitive X-ray scattering techniques, we demonstrate that bromide interacts preferentially over chloride with both monolayers. The structure of the two monolayers and their interfacial electron density profiles obtained from the simulations quantitatively reproduce the experimental data. We observe that chloride and bromide form contact ion pairs with the quaternary ammonium groups on both monolayers. However, ion pairing with bromide leads to a greater reduction in the number of water molecules hydrating the anion, resulting in more energetically stable ion pairs. This leads to long-range (>3 nm) lateral correlations between bromide ions on the structured DODA+ monolayer. These observations indicate that ion hydration is the dominant factor determining the interfacial electrolyte structure.
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Affiliation(s)
- Laura Mortara
- Chemistry Institute, University of São Paulo, São Paulo, SP 05508-000, Brazil
- Physics Department, Technical University of Darmstadt, Darmstadt 64289, Germany
| | - Tetiana Mukhina
- Physics Department, Technical University of Darmstadt, Darmstadt 64289, Germany
| | - Hernan Chaimovich
- Chemistry Institute, University of São Paulo, São Paulo, SP 05508-000, Brazil
| | - Gerald Brezesinski
- Physics Department, Technical University of Darmstadt, Darmstadt 64289, Germany
| | | | - Emanuel Schneck
- Physics Department, Technical University of Darmstadt, Darmstadt 64289, Germany
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2
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Bajrami D, Hossain SI, Barbarossa A, Sportelli MC, Picca RA, Gentile L, Mastrolonardo F, Rosato A, Carocci A, Colabufo NA, Mizaikoff B, Cioffi N. A scalable route to quaternary ammonium-functionalized AgCl colloidal antimicrobials inhibiting food pathogenic bacteria and biofilms. Heliyon 2024; 10:e25260. [PMID: 38327442 PMCID: PMC10847915 DOI: 10.1016/j.heliyon.2024.e25260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/09/2024] Open
Abstract
This study explores how a simple argentometric titration-like approach could be evolved into a versatile, scalable, fast, and robust strategy for the production of AgCl/quaternary ammonium compounds (QACs) colloidal nanoantimicrobials (NAMs). These systems, which are green, stable, cost-effective, and reproducible are found to be effective against a wide range of food pathogenic bacteria and biofilms. The option of a large-scale production for such colloidal suspensions was explored via the use of a peristaltic pump. The utilization of various types of biosafe QACs and a wide range of solvents including aqueous and organic ones renders this system green and versatile. Nanocolloids (NCs) were characterized using UV-Vis, X-ray photoelectron and Fourier transform infrared (FTIR) spectroscopies. Their morphology and crystalline nature were investigated by transmission electron microscopy (TEM) and selected area diffraction pattern (SAED). Nanoparticle (NP) size distribution and hydrodynamic radius were measured by dynamic light scattering (DLS), while the ζ-potential was found to be highly positive, thus indicating significant colloidal stability and antimicrobial activity. In fact, the higher the NP surface charge, the stronger was their bioactivity. Furthermore, the antibacterial and antibiofilm effects of the as-prepared NCs were tested against Gram-positive bacteria, such as Staphylococcus aureus (ATCC 29213) and Listeria monocytogenes 46, and Gram-negative bacteria, such as Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC 27853). The results clearly indicate that AgCl/QACs provide pronounced antibiofilm activity with long-term bacteriostatic effects against foodborne pathogenic bacteria rendering them an ideal choice for active food packaging systems.
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Affiliation(s)
- Diellza Bajrami
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany
| | - Syed Imdadul Hossain
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Alexia Barbarossa
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Maria Chiara Sportelli
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Rosaria Anna Picca
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | - Luigi Gentile
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
| | | | - Antonio Rosato
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Alessia Carocci
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
| | - Nicola Antonio Colabufo
- Department of Pharmacy-Drug Sciences, University of Bari “Aldo Moro”, 70126, Bari, Italy
- Biofordrug Srl, University of Bari “Aldo Moro”, Via Dante 95, 70019, Triggiano, Bari, Italy
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert Einstein-Allee 11, 89081, Ulm, Germany
- Hahn-Schickard, Sedanstrasse 14, 89077, Ulm, Germany
| | - Nicola Cioffi
- Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, 70126, Bari, Italy
- CSGI (Center for Colloid and Surface Science) C/o Dept. Chemistry, Via E. Orabona, 4, 70126, Bari, Italy
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Sahu S, Srinivasan H, Jadhav SE, Sharma VK, Debnath A. Aspirin-Induced Ordering and Faster Dynamics of a Cationic Bilayer for Drug Encapsulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16432-16443. [PMID: 37948158 DOI: 10.1021/acs.langmuir.3c02241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The lipid dynamics and phase play decisive roles in drug encapsulation and delivery to the intracellular target. Thus, understanding the dynamic and structural alterations of membranes induced by drugs is essential for targeted delivery. To this end, united-atom molecular dynamics simulations of a model bilayer, dioctadecyldimethylammonium bromide (DODAB), are performed in the absence and presence of the usual nonsteroidal anti-inflammatory drug (NSAID), aspirin, at 298, 310, and 345 K. At 298 and 310 K, the bilayers are in the interdigitated two-dimensional square phases, which become rugged in the presence of aspirin, as evident from height fluctuations. At 345 K, the bilayer is in the fluid phase in both the absence and presence of aspirin. Aspirin is preferentially located near the oppositely charged headgroup and creates void space, which leads to an increase in the interdigitation and order parameters. Although the center of mass of lipids experiences structural arrest, they reach the diffusive regime faster and have higher lateral diffusion constants in the presence of aspirin. Results are found to be consistent with recent quasi-elastic neutron scattering studies that reveal that aspirin acts as a plasticizer and enhances lateral diffusion of lipids in both ordered and fluid phases. Different relaxation time scales of the bonds along the alkyl tails of DODAB due to the multitude of lipid motions become faster upon the addition of aspirin. Our results show that aspirin insertion is most favorable at physiological temperature. Thus, the ordered, more stable, and faster DODAB bilayer can be a potential drug carrier for the protected encapsulation of aspirin, followed by targeted and controlled drug release with antibacterial activity in the future.
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Affiliation(s)
- Samapika Sahu
- Department of Chemistry, Indian Institute of Technology, Jodhpur 342037, India
| | - Harish Srinivasan
- Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - Sankalp E Jadhav
- Department of Chemistry, Indian Institute of Technology, Jodhpur 342037, India
| | - Veerendra K Sharma
- Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
| | - Ananya Debnath
- Department of Chemistry, Indian Institute of Technology, Jodhpur 342037, India
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Hsieh AH, Franses EI, Corti DS. Formation of gem-like dispersions of soft crystallites in water by vesicles of a cationic surfactant. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Carmona-Ribeiro AM. Supramolecular Nanostructures for Vaccines. Biomimetics (Basel) 2021; 7:6. [PMID: 35076466 PMCID: PMC8788484 DOI: 10.3390/biomimetics7010006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 12/21/2021] [Accepted: 12/25/2021] [Indexed: 12/31/2022] Open
Abstract
Although this is an era of pandemics and many devastating diseases, this is also a time when bionanotechnology flourishes, illuminating a multidisciplinary field where vaccines are quickly becoming a balsam and a prevention against insidious plagues. In this work, we tried to gain and also give a deeper understanding on nanovaccines and their way of acting to prevent or cure cancer, infectious diseases, and diseases caused by parasites. Major nanoadjuvants and nanovaccines are temptatively exemplified trying to contextualize our own work and its relative importance to the field. The main properties for novel adjuvants seem to be the nanosize, the cationic character, and the biocompatibility, even if it is achieved in a low dose-dependent manner.
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Affiliation(s)
- Ana Maria Carmona-Ribeiro
- Biocolloids Laboratory, Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Avenida Professor Lineu Prestes, 748, Butantan, São Paulo CEP 05508-000, SP, Brazil
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Feitosa E, Adati RD, Constantino CJL, Aoki PHB. Lipid exchanges between dioctadecyldimethylammonium bromide monolayer and vesicles in the subphase. J SURFACTANTS DETERG 2021. [DOI: 10.1002/jsde.12556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eloi Feitosa
- Academic Department of Chemistry and Biology Federal University of Technology—Paraná (UTFPR) Curitiba Brazil
| | - Renata D. Adati
- Academic Department of Chemistry and Biology Federal University of Technology—Paraná (UTFPR) Curitiba Brazil
| | | | - Pedro H. B. Aoki
- School of Sciences, Humanities and Languages São Paulo State University (UNESP) Assis Brazil
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7
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Effect of salts on size and morphology of extruded dimethyldioctadecylammonium bromide or chloride vesicle for polymeric nanocapsules synthesis via templating emulsion polymerization. J Colloid Interface Sci 2020; 587:393-401. [PMID: 33370661 DOI: 10.1016/j.jcis.2020.11.116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 11/29/2020] [Indexed: 11/20/2022]
Abstract
In preparing polymer capsules by vesicle templated emulsion polymerization, the initial size and morphology of the biomimetic vesicle template dictate the final size and morphology of the capsules. The presence of salts (NaCl, NaBr and LiCl) influences the size, dispersity (PDI) and morphology of dimethyldioctadecylammonium bromide or chloride (DODAX, X = Br- or Cl-) vesicles, prepared via membrane extrusion. DODAX vesicles in pure water exhibit broad size distributions with PDI of 0.5 and 0.3 for DODAB and DODAC, respectively. Addition of salts in water before (pre-addition) and after (post-addition) extrusion reduces the size and PDI of the vesicles significantly and results in various morphology investigated with cryo-TEM. It is observed that at low salt concentration (≤0.5 mM) in pre-addition, DODAX exists as a nice quasi spherical unilamellar vesicle, suitable for vesicle templated polymerization whereas in post-addition of salt at any concentration, the morphology is dominated by structures not suitable for templating application. The information obtained here is crucial for vesicle templated emulsion polymerization and it will be shown that there is a relationship between vesicle template morphology and final polymer capsule morphology.
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Sharma VK, Srinivasan H, García Sakai V, Mitra S. Dioctadecyldimethylammonium bromide, a surfactant model for the cell membrane: Importance of microscopic dynamics. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2020; 7:051301. [PMID: 32984433 PMCID: PMC7511241 DOI: 10.1063/4.0000030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/25/2020] [Indexed: 05/11/2023]
Abstract
Cationic lipid membranes have recently attracted huge attention both from a fundamental point of view and due to their practical applications in drug delivery and gene therapy. The dynamical behavior of the lipids in the membrane is a key parameter controlling various physiological processes and drug release kinetics. Here, we review the dynamical and thermotropic phase behavior of an archetypal cationic lipid membrane, dioctadecyldimethylammonium bromide (DODAB), as studied using neutron scattering and molecular dynamics simulation techniques. DODAB membranes exhibit interesting phase behavior, specifically showing coagel, gel, and fluid phases in addition to a large hysteresis when comparing heating and cooling cycles. The dynamics of the lipid membrane is strongly dependent on the physical state of the bilayer. Lateral diffusion of the lipids is faster, by an order of magnitude, in the fluid phase than in the ordered phase. It is not only the characteristic times but also the nature of the segmental motions that differ between the ordered and fluid phases. The effect of different membrane active molecules including drugs, stimulants, gemini surfactants, and unsaturated lipids, on the dynamical and thermotropic phase behavior of the DODAB membrane, is also discussed here. Various interesting features such as induced synchronous ordering between polar head groups and tails, sub diffusive behavior, etc., are observed. The results shed light on the interaction between these additives and the membrane, which is found to be a complex interplay between the physical state of the membrane, charge, concentration, molecular architecture of the additives, and their location within the membrane.
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Affiliation(s)
- V. K. Sharma
- Author to whom correspondence should be addressed: and . Phone: +91-22-25594604
| | | | - V. García Sakai
- ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
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Sharma VK, Mitra S, Mukhopadhyay R. Dynamic Landscape in Self-Assembled Surfactant Aggregates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14151-14172. [PMID: 30730752 DOI: 10.1021/acs.langmuir.8b03596] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A process in which a disordered system of pre-existing molecules generates an organized structure through specific, local interactions among the molecules themselves is termed molecular self-assembly. Micelles, microemulsions, and vesicles are examples of such self-assembled systems where amphiphilic molecules are involved. As the functional properties of these systems (such as wetting and emulsification, release of solubilized drugs, etc.) are dictated by the dynamic behavior of the surfactants at the molecular level, it is of immense interest to investigate these systems for the same. The dynamics in soft matter systems is quite complex, involving different time and length scales. We used a combination of neutron scattering and molecular dynamics simulation studies in probing the dynamic landscape in various self-assembled surfactant aggregates. Neutron scattering experiments were carried out using several spectrometers covering a wide dynamic range to probe motions on different time scales. The interaction between the surfactants can be varied by changing the molecular architecture, counterion concentration, temperature, and so forth. It is important to study the effect of these parameters on the dynamics of surfactants in these aggregates. We have carried out experiments on various ionic (anionic as well as cationic) micelles with varied counterion concentrations, vesicles, and lipid bilayers to unravel the complex dynamic features present in these systems. In this feature article, we will discuss some important results of our recent work on dynamics in these self-assembled surfactant aggregates.
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Affiliation(s)
| | - Subhankur Mitra
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
- Homi Bhabha National Institute , Anushaktinagar, Mumbai 400094 , India
| | - Ramaprosad Mukhopadhyay
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
- Homi Bhabha National Institute , Anushaktinagar, Mumbai 400094 , India
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10
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Feitosa E, Lemos M, Adati RD. Mixed Cationic Surfactant Vesicles in (Dioctadecyldimethylammonium Bromide)/NaCl and (Dioctadecyldimethylammonium Chloride)/NaBr Aqueous Dispersions. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eloi Feitosa
- Department of PhysicsSão Paulo State University, Rua Cristovao Colombo 2265 15.054‐000 São José do Rio Preto São Paulo Brazil
| | - Monique Lemos
- Department of PhysicsSão Paulo State University, Rua Cristovao Colombo 2265 15.054‐000 São José do Rio Preto São Paulo Brazil
| | - Renata D. Adati
- Department of Chemistry and BiologyFederal University of Technology ‐ Paraná (UTFPR) Curitiba Brazil
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Dubey PS, Sharma VK, Srinivasan H, Mitra S, Sakai VG, Mukhopadhyay R. Effects of NSAIDs on the Dynamics and Phase Behavior of DODAB Bilayers. J Phys Chem B 2018; 122:9962-9972. [PMID: 30351108 DOI: 10.1021/acs.jpcb.8b07093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite well-known side effects, nonsteroidal anti-inflammatory drugs (NSAIDs) are one of the most prescribed drugs worldwide for their anti-inflammatory and antipyretic properties. Here, we report the effects of two NSAIDs, aspirin and indomethacin, on the thermotropic phase behavior and the dynamics of a dioctadecyldimethylammonium bromide (DODAB) lipid bilayer as studied using neutron scattering techniques. Elastic fixed window scans showed that the addition of aspirin and indomethacin affects the phase behavior of a DODAB bilayer in both heating and cooling cycles. Upon heating, there is a change in the coagel- to fluid-phase transition temperature from 327 K for pure DODAB bilayer to 321 and 323 K in the presence of aspirin and indomethacin, respectively. More strikingly, upon cooling, the addition of NSAIDs suppresses the formation of the intermediate gel phase observed in pure DODAB. The suppression of the gel phase on addition of the NSAIDs evidences the synchronous ordering of a lipid headgroup and chain. Analysis of quasi-elastic neutron scattering data showed that only localized internal motion exists in the coagel phase, whereas both internal and lateral motions exist in the fluid phase. The internal motion is described by a fractional uniaxial rotational diffusion model in the coagel phase and by a localized translation diffusion model in the fluid phase. In the coagel phase, the rotational diffusion coefficient of DODAB is found to be almost twice for the addition of the drugs, whereas the mobility fraction did not change for indomethacin but becomes twice for aspirin. In the fluid phase, the lateral motion, described well by a continuous diffusion model, is found to be slower by about ∼30% for indomethacin but almost no change for aspirin. For the internal motion, addition of aspirin leads to enhancement of the internal motion, whereas indomethacin did not show significant effect. This study shows that the effect of different NSAIDs on the dynamics of the lipid membrane is not the same; hence, one must consider these NSAIDs individually while studying their action mechanism on the cell membrane.
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Affiliation(s)
- P S Dubey
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
| | - V K Sharma
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
| | - H Srinivasan
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India
| | - S Mitra
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India.,Homi Bhabha National Institute , Anushaktinagar , Mumbai 400094 , India
| | - V García Sakai
- ISIS Pulsed Neutron and Muon Facility, Science and Technology Facilities Council , Rutherford Appleton Laboratory , Didcot OX11 0QX , U.K
| | - R Mukhopadhyay
- Solid State Physics Division , Bhabha Atomic Research Centre , Mumbai 400085 , India.,Homi Bhabha National Institute , Anushaktinagar , Mumbai 400094 , India
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12
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Dynamical Transitions and Diffusion Mechanism in DODAB Bilayer. Sci Rep 2018; 8:1862. [PMID: 29382881 PMCID: PMC5789887 DOI: 10.1038/s41598-018-19899-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/20/2017] [Indexed: 12/02/2022] Open
Abstract
Dioctadecyldimethylammonium bromide (DODAB), a potential candidate for applications in drug transport or DNA transfection, forms bilayer in aqueous media exhibiting a rich phase behavior. Here, we report the detailed dynamical features of DODAB bilayer in their different phases (coagel, gel and fluid) as studied by neutron scattering techniques. Elastic intensity scans show dynamical transitions at 327 K in the heating and at 311 K and 299 K during cooling cycle. These results are consistent with calorimetric studies, identified as coagel-fluid phase transition during heating, and fluid-gel and gel-coagel phase transitions during cooling. Quasielastic Neutron Scattering (QENS) data analysis showed presence of only localized internal motion in the coagel phase. However, in the gel and fluid phases, two distinct motions appear, namely lateral motion of the DODAB monomers and a faster localized internal motion of the monomers. The lateral motion of the DODAB molecule is described by a continuous diffusion model and is found to be about an order of magnitude slower in the gel phase than in the fluid phase. To gain molecular insights, molecular dynamics simulations of DODAB bilayer have also been carried out and the results are found to be in agreement with the experiment.
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Oliveira ACN, Nogueira SS, Gonçalves O, Cerqueira MF, Alpuim P, Tovar J, Rodriguez-Abreu C, Brezesinski G, Gomes AC, Lúcio M, Oliveira MECDR. Role of counter-ion and helper lipid content in the design and properties of nanocarrier systems: a biophysical study in 2D and 3D lipid assemblies. RSC Adv 2016. [DOI: 10.1039/c6ra08125h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study validates a model for DODAX : MO assemblies highlighting the role of counter-ion and MO content in their biophysical properties.
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Affiliation(s)
- Ana C. N. Oliveira
- CBMA (Centre of Molecular and Environmental Biology)
- Department of Biology
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - Sara S. Nogueira
- CFUM (Centre of Physics)
- Department of Physics
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - Odete Gonçalves
- CBMA (Centre of Molecular and Environmental Biology)
- Department of Biology
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - M. F. Cerqueira
- CFUM (Centre of Physics)
- Department of Physics
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - P. Alpuim
- CFUM (Centre of Physics)
- Department of Physics
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - Júlia Tovar
- CFUM (Centre of Physics)
- Department of Physics
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | | | | | - Andreia C. Gomes
- CBMA (Centre of Molecular and Environmental Biology)
- Department of Biology
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
| | - Marlene Lúcio
- CFUM (Centre of Physics)
- Department of Physics
- University of Minho
- Campus of Gualtar
- 4710-057 Braga
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Rose F, Wern JE, Ingvarsson PT, van de Weert M, Andersen P, Follmann F, Foged C. Engineering of a novel adjuvant based on lipid-polymer hybrid nanoparticles: A quality-by-design approach. J Control Release 2015; 210:48-57. [PMID: 25957906 DOI: 10.1016/j.jconrel.2015.05.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 05/05/2015] [Indexed: 11/15/2022]
Abstract
The purpose of this study was to design a novel and versatile adjuvant intended for mucosal vaccination based on biodegradable poly(DL-lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) modified with the cationic surfactant dimethyldioctadecylammonium (DDA) bromide and the immunopotentiator trehalose-6,6'-dibehenate (TDB) (CAF01) to tailor humoral and cellular immunity characterized by antibodies and Th1/Th17 responses. Such responses are important for the protection against diseases caused by intracellular bacteria such as Chlamydia trachomatis and Mycobacterium tuberculosis. The hybrid NPs were engineered using an oil-in-water single emulsion method and a quality-by-design approach was adopted to define the optimal operating space (OOS). Four critical process parameters (CPPs) were identified, including the acetone concentration in the water phase, the stabilizer [polyvinylalcohol (PVA)] concentration, the lipid-to-total solid ratio, and the total concentration. The CPPs were linked to critical quality attributes consisting of the particle size, polydispersity index (PDI), zeta-potential, thermotropic phase behavior, yield and stability. A central composite face-centered design was performed followed by multiple linear regression analysis. The size, PDI, enthalpy of the phase transition and yield were successfully modeled, whereas the models for the zeta-potential and the stability were poor. Cryo-transmission electron microscopy revealed that the main structural effect on the nanoparticle architecture is caused by the use of PVA, and two different morphologies were identified: i) A PLGA core coated with one or several concentric lipid bilayers, and ii) a PLGA nanoshell encapsulating lipid membrane structures. The optimal formulation, identified from the OOS, was evaluated in vivo. The hybrid NPs induced antibody and Th1/Th17 immune responses that were similar in quality and magnitude to the response induced by DDA/TDB liposomes, showing that the adjuvant properties of DDA/TDB are maintained in the PLGA hybrid matrix. This study demonstrates the complexity of formulation design for the engineering of a hybrid lipid-polymer nanoparticle adjuvant.
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Affiliation(s)
- Fabrice Rose
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Jeanette Erbo Wern
- Department of Infectious Disease Immunology, Chlamydia Vaccine Research, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen S, Denmark
| | - Pall Thor Ingvarsson
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Marco van de Weert
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Peter Andersen
- Department of Infectious Disease Immunology, Chlamydia Vaccine Research, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen S, Denmark
| | - Frank Follmann
- Department of Infectious Disease Immunology, Chlamydia Vaccine Research, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen S, Denmark
| | - Camilla Foged
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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15
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Schmiele M, Knittel C, Unruh T, Busch S, Morhenn H, Boesecke P, Funari SS, Schweins R, Lindner P, Westermann M, Steiniger F. Analysis of the structure of nanocomposites of triglyceride platelets and DNA. Phys Chem Chem Phys 2015; 17:17939-56. [DOI: 10.1039/c5cp01241d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DNA-complexes with platelet-like, cationically modified lipid nanoparticles (cLNPs) are studied with regard to the formation of nanocomposite structures with a sandwich-like arrangement of the DNA and platelets.
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Affiliation(s)
- Martin Schmiele
- Professur für Nanomaterialcharakterisierung (Streumethoden)
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | - Charlotte Knittel
- Professur für Nanomaterialcharakterisierung (Streumethoden)
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | - Tobias Unruh
- Professur für Nanomaterialcharakterisierung (Streumethoden)
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | - Sebastian Busch
- German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ)
- Helmholtz-Zentrum Geesthacht GmbH
- 85748 Garching
- Germany
| | - Humphrey Morhenn
- Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II)
- 85747 Garching
- Germany
| | - Peter Boesecke
- European Synchrotron Radiation Facility (ESRF)
- 38042 Grenoble Cedex 9
- France
| | | | - Ralf Schweins
- DS/LSS
- Institut Laue-Langevin (ILL)
- 38042 Grenoble Cedex 9
- France
| | - Peter Lindner
- DS/LSS
- Institut Laue-Langevin (ILL)
- 38042 Grenoble Cedex 9
- France
| | - Martin Westermann
- Center for Electron Microscopy of the Jena University Hospital
- 07743 Jena
- Germany
| | - Frank Steiniger
- Center for Electron Microscopy of the Jena University Hospital
- 07743 Jena
- Germany
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16
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Reversibility of Thermal Transitions in Dilute Dioctadecyl-Dimethyl-Ammonium Bromide Vesicles. J SURFACTANTS DETERG 2014. [DOI: 10.1007/s11743-014-1581-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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