1
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Bhattacharya A, Falk ID, Moss FR, Weiss TM, Tran KN, Burns NZ, Boxer SG. Structure-function relationships in pure archaeal bipolar tetraether lipids. Chem Sci 2024:d4sc03788j. [PMID: 39149219 PMCID: PMC11320390 DOI: 10.1039/d4sc03788j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 08/05/2024] [Indexed: 08/17/2024] Open
Abstract
Archaeal bipolar tetraether lipids (BTLs) are among the most unusual lipids occurring in nature because of their presumed ability to span the entire membrane to form a monolayer structure. It is believed that because of their unique structural organization and chemical stability, BTLs offer extraordinary adaptation to archaea to thrive in the most extreme milieus. BTLs have also received considerable attention for development of novel membrane-based materials. Despite their fundamental biological significance and biotechnological interests, prior studies on pure BTLs are limited because of the difficulty to extract them in pure form from natural sources or to synthesize them chemically. Here we have utilized chemical synthesis to enable in-depth biophysical investigations on a series of chemically pure glycerol dialkyl glycerol tetraether (GDGT) lipids. The lipids self-assemble to form membrane-bound vesicles encapsulating polar molecules in aqueous media, and reconstitute a functional integral membrane protein. Structural properties of the membranes were characterized via small-angle X-ray scattering (SAXS) and cryogenic electron microscopy (cryo-EM). SAXS studies on bulk aqueous dispersions of GDGT lipids over 10-90 °C revealed lamellar and non-lamellar phases and their transitions. Next we asked whether vesicles overwhelmingly composed of a single GDGT species can undergo fusion as it is difficult to conceptualize such behavior with the assumption that such membranes have a monolayer structure. Interestingly, we observed that GDGT vesicles undergo fusion with influenza virus with lipid mixing kinetics comparable to that with vesicles composed of monopolar phospholipids. Our results suggest that GDGT membranes may consist of regions with a bilayer structure or form bilayer structures transiently which facilitate fusion and thus offer insight into how archaea may perform important physiological functions that require dynamical membrane behavior.
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Affiliation(s)
- Ahanjit Bhattacharya
- Department of Chemistry, Stanford University Stanford CA 94305 USA
- Stanford Center for Innovation in Global Health, Stanford University Stanford CA 94305 USA
| | - Isaac D Falk
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | - Frank R Moss
- Linac Coherent Light Source, SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Thomas M Weiss
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
| | - Khoi N Tran
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | - Noah Z Burns
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | - Steven G Boxer
- Department of Chemistry, Stanford University Stanford CA 94305 USA
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2
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Ugwuodo CJ, Colosimo F, Adhikari J, Bloodsworth K, Wright SA, Eder J, Mouser PJ. Changes in environmental and engineered conditions alter the plasma membrane lipidome of fractured shale bacteria. Microbiol Spectr 2024; 12:e0233423. [PMID: 38059585 PMCID: PMC10782966 DOI: 10.1128/spectrum.02334-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 10/31/2023] [Indexed: 12/08/2023] Open
Abstract
IMPORTANCE Microorganisms inadvertently introduced into the shale reservoir during fracturing face multiple stressors including brine-level salinities and starvation. However, some anaerobic halotolerant bacteria adapt and persist for long periods of time. They produce hydrogen sulfide, which sours the reservoir and corrodes engineering infrastructure. In addition, they form biofilms on rock matrices, which decrease shale permeability and clog fracture networks. These reduce well productivity and increase extraction costs. Under stress, microbes remodel their plasma membrane to optimize its roles in protection and mediating cellular processes such as signaling, transport, and energy metabolism. Hence, by observing changes in the membrane lipidome of model shale bacteria, Halanaerobium congolense WG10, and mixed consortia enriched from produced fluids under varying subsurface conditions and growth modes, we provide insight that advances our knowledge of the fractured shale biosystem. We also offer data-driven recommendations for improving biocontrol efficacy and the efficiency of energy recovery from unconventional formations.
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Affiliation(s)
- Chika Jude Ugwuodo
- Natural Resources and Earth Systems Science, University of New Hampshire, Durham, New Hampshire, USA
- Department of Civil and Environmental Engineering, University of New Hampshire, Durham, New Hampshire, USA
| | | | | | - Kent Bloodsworth
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Stephanie A. Wright
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Josie Eder
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Paula J. Mouser
- Department of Civil and Environmental Engineering, University of New Hampshire, Durham, New Hampshire, USA
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3
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Heller WT. Small-Angle Neutron Scattering Study of a Phosphatidylcholine-Phosphatidylethanolamine Mixture. ACS OMEGA 2023; 8:33755-33762. [PMID: 37744859 PMCID: PMC10515593 DOI: 10.1021/acsomega.3c04164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 08/23/2023] [Indexed: 09/26/2023]
Abstract
The properties of single-component phospholipid lipid bilayers have been extensively characterized. Natural cell membranes are not so simple, consisting of a diverse mixture of lipids and proteins. While having detailed structural information on complex membranes would be useful for understanding their structure and function, experimentally characterizing such membranes at a level of detail applied to model phospholipid bilayers is challenging. Here, small-angle neutron scattering with selective deuteration was used to characterize a binary lipid mixture composed of 1,2-dimyristoyl-3-sn-glycero-phosphatidylcholine and 1,2-dimyristoyl-3-sn-glycero-phosphatidylethanolamine. The data analysis provided the area per lipid in each leaflet as well as the asymmetry of the composition of the inner and outer leaflets of the bilayer. The results provide new insight into the structure of the lipid bilayer when this lipid mixture is used to prepare vesicles.
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Affiliation(s)
- William T. Heller
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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4
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Maleš P, Butumović M, Erceg I, Brkljača Z, Bakarić D. Influence of DPPE surface undulations on melting temperature determination: UV/Vis spectroscopic and MD study. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184072. [PMID: 36216096 DOI: 10.1016/j.bbamem.2022.184072] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 09/09/2022] [Accepted: 10/04/2022] [Indexed: 11/13/2022]
Abstract
One of the most distinguished quantities that describes lipid main phase transition, i.e. the transition from the gel (Lβ(')) to the fluid (Lα) phase, is its melting temperature (Tm). Because melting is accompanied by a large change in enthalpy the, Lβ(') → Lα transition can be monitored by various calorimetric, structural and spectroscopic techniques and Tm should be the same regardless of the metric monitored or the technique employed. However, in the case of DPPE multilamellar aggregates there is a small but systematic deviation of Tm values determined by DSC and FTIR spectroscopy. The aim of this paper is to explain this discrepancy by combined UV/Vis spectroscopic and MD computational approach. Multivariate analysis performed on temperature-dependent UV/Vis spectra of DPPE suspensions demonstrated that at 55 ± 1 °C certain phenomenon causes a small but detectable change in suspension turbidity, whereas a dominant change in the latter is registered at 63.2 ± 0.4 °C that coincides with Tm value determined from DSC curve. If this effect should be ignored, the overall data give Tm value the same as FTIR spectra data (61.0 ± 0.4 °C). As the classical MD simulations suggest that about 10° below Tm certain undulations appear at the surface of DPPE bilayers, we concluded that certain discontinuities in curvature fluctuations arise at reported temperature which are to some extent coupled with lipid melting. Ultimately, such events and the associated changes in curvature affect Tm value measured by different techniques.
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Affiliation(s)
- Petra Maleš
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Marija Butumović
- Division of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Ina Erceg
- Division for Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Zlatko Brkljača
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
| | - Danijela Bakarić
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia.
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5
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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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6
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Anticancer drugs tamoxifen and 4hydroxytamoxifen as effectors of phosphatidylethanolamine lipid polymorphism. Chem Phys Lipids 2022; 248:105239. [PMID: 36075353 DOI: 10.1016/j.chemphyslip.2022.105239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 01/25/2023]
Abstract
The interaction of tamoxifen (TMX) and its metabolite 4-hydroxytamoxifen (HTMX) with a biomimetic membrane model system composed of 1,2-dielaidoylphosphatidylethanolamine (DEPE) has been studied using a biophysical approach. Incorporation of TMX into DEPE bilayers gives rise to a progressive broadening of the Lβ/Lα phase transition and a downward temperature shift. The Lβ/Lα phase transition presents multiple endotherms, indicating a lateral segregation of TMX/DEPE domains within the plane of the bilayer. TMX and HTMX also widen and shift the Lα to hexagonal-HII transition toward lower values, the phase diagrams showing that both compounds facilitate formation of the HII phase. TMX increases motional disorder of DEPE acyl chains in the Lβ, Lα and HII phases, whereas the effect of HTMX is clearly different. In addition, neither TMX nor HTMX significantly perturb the hydration state of the polar headgroup region of DEPE. Molecular dynamics (MD) simulations indicate that these drugs do not affect membrane thickness, area per lipid, or the conformation of DEPE molecules. As a general rule, the interaction of HTMX with DEPE is qualitatively similar to TMX but less intense. However, a significant difference shown by MD is that HTMX is mainly placed around the center of each monolayer while TMX is located mainly at the center of the membrane, also having a greater tendency to cluster formation. These results are discussed to understand the modulation of phosphatidylethanolamine lipid polymorphism carried out by these drugs, which could be of relevance to explain their effects on enzyme activity or membrane permeabilization.
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7
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Alrbyawi H, Poudel I, Annaji M, Arnold RD, Tiwari AK, Babu RJ. Recent Advancements of Stimuli-Responsive Targeted Liposomal Formulations for Cancer Drug Delivery. Pharm Nanotechnol 2022; 10:3-23. [PMID: 35156590 DOI: 10.2174/2211738510666220214102626] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 01/09/2022] [Accepted: 01/18/2022] [Indexed: 11/22/2022]
Abstract
Liposomes have gained attention as a well-accepted nanocarrier for several chemotherapeutic drugs and are considered a drug delivery system of choice for a wide range of products. These amphipathic spherical vesicles primarily consist of one or more phospholipid bilayers, showing promise for drug delivery of both hydrophilic and hydrophobic components in addition to unique properties such as biocompatibility, biodegradability, low toxicity, and non-immunogenicity. Recent advances in liposomes are mainly centered on chemical and structural modification with the multifunctional approach to target the cancer cells activating the offensive mechanisms within the proximity of the tumors. Stimuli-responsive liposomes are a precisive approach to deliver and release chemotherapeutic drugs in the tumor site in a controlled fashion, thus reducing damage to normal tissues and preventing the side effects of the conventional chemotherapy regimen. The unique characteristics in the tumor microenvironment facilitate applying an endogenous stimulus (pH, redox potential, or enzymatic activity) to trigger the release of the drug, or external stimulus (heat or light) could be applied to tailor the drug release from liposomes. This review focuses on newer developments in stimuli-sensitive liposomal drug delivery systems designed to apply either exogenous (temperature, light, and magnetic field) or endogenous (pH changes, enzymatic triggers, or redox potential) approaches.
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Affiliation(s)
- Hamad Alrbyawi
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
- Pharmaceutics and Pharmaceutical Technology Department, College of Pharmacy, Taibah University, Medina, Saudi Arabia
| | - Ishwor Poudel
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Manjusha Annaji
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Robert D Arnold
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
| | - Amit K Tiwari
- Department of Pharmacology and Experimental Therapeutics, The University of Toledo, Toledo, Ohio, 43614, USA
| | - R Jayachandra Babu
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, AL 36849, USA
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8
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Maleš P, Brkljača Z, Crnolatac I, Bakarić D. Application of MCR-ALS with EFA on FT-IR spectra of lipid bilayers in the assessment of phase transition temperatures: Potential for discernment of coupled events. Colloids Surf B Biointerfaces 2021; 201:111645. [PMID: 33647711 DOI: 10.1016/j.colsurfb.2021.111645] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 01/12/2021] [Accepted: 02/13/2021] [Indexed: 10/22/2022]
Abstract
Temperature-dependent transmission FT-IR spectroscopy and DSC measurements were conducted on lipid multibilayers constituted from 1,2-dipalmitoyl-sn-glycero-3-phosphocholine. Lipid multibilayers made from 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine, which do not form a ripple phase, were examined as a reference. Spectra were analyzed using multivariate curve resolution technique with alternating least squares and evolving factor analysis (MCR-ALS with EFA) and lipid phase transition temperatures were determined. Polar parts of lipid molecules exert greater response on a ripple phase formation than non-polar ones. However, vibrational signatures of hydrocarbon chains with intramolecular origins display certain qualitative differences that pave the way for future work oriented on uncoupling the events that drive ripple phase formation.
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Affiliation(s)
- Petra Maleš
- Division of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia
| | - Zlatko Brkljača
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Ivo Crnolatac
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia
| | - Danijela Bakarić
- Division for Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10000, Zagreb, Croatia.
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9
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Mohanty S, Sahoo AK, Konkimalla VB, Pal A, Si SC. Naringin in Combination with Isothiocyanates as Liposomal Formulations Potentiates the Anti-inflammatory Activity in Different Acute and Chronic Animal Models of Rheumatoid Arthritis. ACS OMEGA 2020; 5:28319-28332. [PMID: 33163815 PMCID: PMC7643286 DOI: 10.1021/acsomega.0c04300] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 10/12/2020] [Indexed: 05/16/2023]
Abstract
Combination of drugs is extensively used to treat chronic inflammatory disease. Naringin (NAR), sulforaphane (SFN), and phenethyl isothiocyanate (PEITC) are nutraceuticals with promising anti-inflammatory properties. However, their clinical effectiveness gets hindered because of low aqueous solubility and poor bioavailability. In the current study, two combinations of liposome (NAR + SFN and NAR + PEITC) were prepared and studied thoroughly in different in vivo models of acute and chronic models of inflammation. The encapsulation efficiency of NAR, SFN, and PEITC in the combination liposomal formulations (CLFs) prepared with 1,2-dipalmitoyl-sn-glycero-3-phosphocholine/cholesterol/1,2-distearoyl-sn-glycero-3-phosphoethanolamine -020CN (15:4:1 M ratio) was determined to be 79.8 ± 4.2, 46.5 ± 3.6, and 78.5 ± 3.2%, respectively. The CLFs were characterized by differential scanning calorimetry, X-ray diffraction, dynamic light scattering, and Fourier transform infrared spectroscopy. The physicochemical results showed that the preparations were monodisperse (PDI 0.062-0.248) in water with an average size from 140.5 to 165.6 nm and a zeta potential of -47.3 to -53.3 mV. Dissolution studies in vitro showed a slower release of PEITC (>90%, 6 h) in comparison to that of SFN (3 h). Here, we are the first to report the antiarthritic activity of CLF of NAR + SFN and NAR + PEITC in the Freund's complete adjuvant (FCA)-induced arthritic model. At an intraperitoneal dose (375 + 375 μg/mL) for 3 weeks, the NAR + PEITC liposome significantly improves both % paw edema and arthritic score compared to their free drug combinations in FCA rats. Most importantly, hematological and biochemical results showed improved anemic conditions with significant changes in the SGOT, SGPT, and ALP levels. The ELISA results showed similar trends of increased cytokine (IL-10) and decreased inflammation markers (TNF-α, IL-6, IFN-γ). Histological evaluations showing reduction in cell infiltration, pannus formation, and bone and cartilage destruction further confirm and validate the antiarthritic activity of the CLF. This comprehensive study reveals the effectiveness of combination liposomes of poorly soluble anti-inflammatory molecules (NAR, SFN, PEITC) in the treatment of arthritis.
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Affiliation(s)
- Sangeeta Mohanty
- School of Pharmaceutical
Sciences, Siksha O Anusandhan Deemed to
Be University, Bhubaneswar 751030, India
| | - Ashish Kumar Sahoo
- School
of Biological Sciences, National Institute
of Science Education and Research, HBNI, Jatni, Odisha 752050, India
| | - V. Badireenath Konkimalla
- School
of Biological Sciences, National Institute
of Science Education and Research, HBNI, Jatni, Odisha 752050, India
| | - Abhisek Pal
- Gitam School of Pharmacy, Gitam Deemed to Be University, Hyderabad 502329, India
| | - Sudam Chandra Si
- School of Pharmaceutical
Sciences, Siksha O Anusandhan Deemed to
Be University, Bhubaneswar 751030, India
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10
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Vallooran JJ, Duss M, Ansorge P, Mezzenga R, Landau EM. Stereochemical Purity Can Induce a New Crystalline Mesophase in Phytantriol Lipids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9132-9141. [PMID: 32654490 DOI: 10.1021/acs.langmuir.0c01344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The impact of stereochemical purity of lipids on their self-assembly behavior is critical for establishing their true phase behavior from their commercial counterparts, which often contains stereoisomeric mixtures and other impurities. Here, stereochemically pure phytantriol (PT), (3,7,11,15-tetramethylhexadecane-1,2,3-triol) was synthesized from the natural trans-phytol and its thermotropic and lyotropic phase behavior in water investigated by small-angle X-ray scattering (SAXS), polarized optical microscopy (POM), and differential scanning calorimetry (DSC). These chemically pure lipids contain two chiral centers at the hydrophilic head group region and two chiral centers at the lipophilic tail region, allowing us to address the question of whether the molecular stereochemistry is related to the macroscopic phase behavior of phytantriol. In contrast to its commercial stereoisomeric mixtures, which form an isotropic micellar phase, neat (2S,3S,7R,11R)-3,7,11,15-tetramethylhexadecane-1,2,3-triol (S,S-PT) shows a smectic lamellar phase at room temperature, whereas (2R,3R,7R,11R)-3,7,11,15-tetramethylhexadecane-1,2,3-triol (R,R-PT) forms solid crystals. The lyotropic phase behavior of R,R-PT appears to be identical to that of the previously reported commercial stereoisomeric PT mixtures. In contrast, S,S-PT exhibits a different phase behavior. A lamellar crystalline phase (Lc) is formed instead of an isotropic micellar phase at a low water content, which also coexisted with other phases at low temperature. Subtle change in the shape of the diastereomers leads to variable steric interactions and subsequently affects the packing of the lipids at the molecular level, thereby influencing its self-assembling behavior. Finally, lipidic cubic phase crystallization of the membrane protein bacteriorhodopsin yielded a larger number of microcrystals with a higher average crystal length from S,S-PT than from commercial PT, suggesting faster nucleation.
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Affiliation(s)
- Jijo J Vallooran
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Michael Duss
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Philipp Ansorge
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology, ETH Zurich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Ehud M Landau
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
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11
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Dlouhý O, Kurasová I, Karlický V, Javornik U, Šket P, Petrova NZ, Krumova SB, Plavec J, Ughy B, Špunda V, Garab G. Modulation of non-bilayer lipid phases and the structure and functions of thylakoid membranes: effects on the water-soluble enzyme violaxanthin de-epoxidase. Sci Rep 2020; 10:11959. [PMID: 32686730 PMCID: PMC7371714 DOI: 10.1038/s41598-020-68854-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/26/2020] [Indexed: 12/19/2022] Open
Abstract
The role of non-bilayer lipids and non-lamellar lipid phases in biological membranes is an enigmatic problem of membrane biology. Non-bilayer lipids are present in large amounts in all membranes; in energy-converting membranes they constitute about half of their total lipid content—yet their functional state is a bilayer. In vitro experiments revealed that the functioning of the water-soluble violaxanthin de-epoxidase (VDE) enzyme of plant thylakoids requires the presence of a non-bilayer lipid phase. 31P-NMR spectroscopy has provided evidence on lipid polymorphism in functional thylakoid membranes. Here we reveal reversible pH- and temperature-dependent changes of the lipid-phase behaviour, particularly the flexibility of isotropic non-lamellar phases, of isolated spinach thylakoids. These reorganizations are accompanied by changes in the permeability and thermodynamic parameters of the membranes and appear to control the activity of VDE and the photoprotective mechanism of non-photochemical quenching of chlorophyll-a fluorescence. The data demonstrate, for the first time in native membranes, the modulation of the activity of a water-soluble enzyme by a non-bilayer lipid phase.
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Affiliation(s)
- Ondřej Dlouhý
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic
| | - Irena Kurasová
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic.,Global Change Research Institute, Czech Academy of Sciences, Brno, Czech Republic
| | - Václav Karlický
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic.,Global Change Research Institute, Czech Academy of Sciences, Brno, Czech Republic
| | - Uroš Javornik
- Slovenian NMR Center, National Institute of Chemistry, Ljubljana, Slovenia
| | - Primož Šket
- Slovenian NMR Center, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Center of Excellence, Ljubljana, Slovenia
| | - Nia Z Petrova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Sashka B Krumova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Janez Plavec
- Slovenian NMR Center, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Center of Excellence, Ljubljana, Slovenia.,Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Bettina Ughy
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic. .,Institute of Plant Biology, Biological Research Centre, Szeged, Hungary.
| | - Vladimír Špunda
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic. .,Global Change Research Institute, Czech Academy of Sciences, Brno, Czech Republic.
| | - Győző Garab
- Faculty of Science, University of Ostrava, Ostrava, Czech Republic. .,Institute of Plant Biology, Biological Research Centre, Szeged, Hungary.
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12
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Abri Aghdam M, Bagheri R, Mosafer J, Baradaran B, Hashemzaei M, Baghbanzadeh A, de la Guardia M, Mokhtarzadeh A. Recent advances on thermosensitive and pH-sensitive liposomes employed in controlled release. J Control Release 2019; 315:1-22. [DOI: 10.1016/j.jconrel.2019.09.018] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 12/12/2022]
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13
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Tassler S, Dobner B, Lampp L, Ziółkowski R, Malinowska E, Wölk C, Brezesinski G. DNA Delivery Systems Based on Peptide-Mimicking Cationic Lipids-The Effect of the Co-Lipid on the Structure and DNA Binding Capacity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4613-4625. [PMID: 30840475 PMCID: PMC6727600 DOI: 10.1021/acs.langmuir.8b04139] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/27/2019] [Indexed: 06/09/2023]
Abstract
In continuation of previous work, we present a new promising DNA carrier, OO4, a highly effective peptide-mimicking lysine-based cationic lipid. The structural characteristics of the polynucleotide carrier system OO4 mixed with the commonly used co-lipid DOPE and the saturated phospholipid DPPE have been studied in two-dimensional and three-dimensional model systems to understand their influence on the physical-chemical properties. The phase behavior of pure OO4 and its mixtures with DOPE and DPPE was studied at the air-water interface using a Langmuir film balance combined with infrared reflection-absorption spectroscopy. In bulk, the self-assembling structures in the presence and absence of DNA were determined by small-angle and wide-angle X-ray scattering. The amount of adsorbed DNA to cationic lipid bilayers was measured using a quartz crystal microbalance. The choice of the co-lipid has an enormous influence on the structure and capability of binding DNA. DOPE promotes the formation of nonlamellar lipoplexes (cubic and hexagonal structures), whereas DPPE promotes the formation of lamellar lipoplexes. The correlation of the observed structures with the transfection efficiency and serum stability indicates that OO4/DOPE 1:3 lipoplexes with a DNA-containing cubic phase encapsulated in multilamellar structures seem to be most promising.
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Affiliation(s)
- Stephanie Tassler
- Max
Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg
1, 14476 Potsdam, Germany
| | - Bodo Dobner
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Lisa Lampp
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Robert Ziółkowski
- Faculty
of Chemistry, Department of Microbioanalytics, The Chair of Medical
Biotechnology, Warsaw University of Technology, ul. Noakowskiego 3, 00-664 Warszawa, Poland
| | - Elżbieta Malinowska
- Faculty
of Chemistry, Department of Microbioanalytics, The Chair of Medical
Biotechnology, Warsaw University of Technology, ul. Noakowskiego 3, 00-664 Warszawa, Poland
| | - Christian Wölk
- Institute
of Pharmacy, Martin-Luther-University (MLU)
Halle-Wittenberg, Wolfgang-Langenbeck-Straße
4, 06120 Halle (Saale), Germany
| | - Gerald Brezesinski
- Max
Planck Institute of Colloids and Interfaces, Science Park Potsdam-Golm, Am Mühlenberg
1, 14476 Potsdam, Germany
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14
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Percebom AM, Ferreira GA, Catini DR, Bernardes JS, Loh W. Phase Behavior Controlled by the Addition of Long-Chain n-Alcohols in Systems of Cationic Surfactant/Anionic Polyion Complex Salts and Water. J Phys Chem B 2018; 122:4861-4869. [PMID: 29668285 DOI: 10.1021/acs.jpcb.8b01788] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phase behavior of surfactants in water may be affected by the addition of a third component, and the present study discusses how long-chain n-alcohols affect phase transitions of systems formed by the surfactant hexadecyltrimethylammonium bromide, C16TAB, or its complex salts formed with polyacrylate, C16TAPA30, as well as other previously reported complex salts/water/alcohol systems. Structural characterization by X-ray diffraction patterns at small and wide angles and different temperatures was performed for samples containing n-decanol, n-dodecanol, or n-tetradecanol. Differential scanning calorimetry (DSC) was also used to study the phase transition. The results allowed us to observe and understand the coexistence of lamellar gel (Lβ) and lamellar liquid-crystal (Lα) phases, elucidating the structure of a previously reported mesophase, proposing an alternative assignment. Whereas the chain-melting transition is well-known to be sharp for lipids, we have found that it is broader for C16TAB and C16TAPA in the presence of these n-alcohols. We have investigated the effects of their composition and chain length on the temperature and enthalpy of transition. This elucidates why the addition of n-alcohols with chains slightly shorter than that of the surfactants leads to the formation of an ordered gel-like lamellar phase (Lβ). n-Alcohols act as neutral cosurfactants, leading to more packing, and all of the factors converge to a limit situation, associated with a common critical area occupied by each alkyl chain. We compared our results with other mesophase systems from the literature, demonstrating that the same trends of phase behavior occur for complex salts of other polyelectrolytes with alkyltrimethylammonium surfactants.
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Affiliation(s)
- Ana M Percebom
- Institute of Chemistry , University of Campinas (UNICAMP) , PO Box 6154, 13084-970 Campinas , São Paulo , Brazil.,Department of Chemistry , Pontifical Catholic University of Rio de Janeiro , 22451-900 Rio de Janeiro , Rio de Janeiro , Brazil
| | - Guilherme A Ferreira
- Institute of Chemistry , University of Campinas (UNICAMP) , PO Box 6154, 13084-970 Campinas , São Paulo , Brazil
| | - Daniel Rege Catini
- Institute of Chemistry , University of Campinas (UNICAMP) , PO Box 6154, 13084-970 Campinas , São Paulo , Brazil
| | - Juliana S Bernardes
- Institute of Chemistry , University of Campinas (UNICAMP) , PO Box 6154, 13084-970 Campinas , São Paulo , Brazil.,Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM) , 13083-970 Campinas , São Paulo , Brazil
| | - Watson Loh
- Institute of Chemistry , University of Campinas (UNICAMP) , PO Box 6154, 13084-970 Campinas , São Paulo , Brazil
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15
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Renne MF, de Kroon AIPM. The role of phospholipid molecular species in determining the physical properties of yeast membranes. FEBS Lett 2017; 592:1330-1345. [PMID: 29265372 PMCID: PMC5947837 DOI: 10.1002/1873-3468.12944] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 11/27/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022]
Abstract
In most eukaryotes, including Saccharomyces cerevisiae, glycerophospholipids are the main membrane lipid constituents. Besides serving as general membrane ‘building blocks’, glycerophospholipids play an important role in determining the physical properties of the membrane, which are crucial for proper membrane function. To ensure optimal physical properties, membrane glycerophospholipid composition and synthesis are tightly regulated. This review will summarize our current knowledge of factors and processes determining the membrane glycerophospholipid composition of the reference eukaryote S. cerevisiae at the level of molecular species. Extrapolating from relevant model membrane data, we also discuss how modulation of the molecular species composition can regulate membrane physical properties.
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Affiliation(s)
- Mike F. Renne
- Membrane Biochemistry & BiophysicsDepartment of ChemistryBijvoet Center for Biomolecular Research & Institute of BiomembranesUtrecht Universitythe Netherlands
| | - Anton I. P. M. de Kroon
- Membrane Biochemistry & BiophysicsDepartment of ChemistryBijvoet Center for Biomolecular Research & Institute of BiomembranesUtrecht Universitythe Netherlands
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16
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Vogel R, Pal AK, Jambhrunkar S, Patel P, Thakur SS, Reátegui E, Parekh HS, Saá P, Stassinopoulos A, Broom MF. High-Resolution Single Particle Zeta Potential Characterisation of Biological Nanoparticles using Tunable Resistive Pulse Sensing. Sci Rep 2017; 7:17479. [PMID: 29234015 PMCID: PMC5727177 DOI: 10.1038/s41598-017-14981-x] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/17/2017] [Indexed: 12/25/2022] Open
Abstract
Physicochemical properties of nanoparticles, such as size, shape, surface charge, density, and porosity play a central role in biological interactions and hence accurate determination of these characteristics is of utmost importance. Here we propose tunable resistive pulse sensing for simultaneous size and surface charge measurements on a particle-by-particle basis, enabling the analysis of a wide spectrum of nanoparticles and their mixtures. Existing methodologies for measuring zeta potential of nanoparticles using resistive pulse sensing are significantly improved by including convection into the theoretical model. The efficacy of this methodology is demonstrated for a range of biological case studies, including measurements of mixed anionic, cationic liposomes, extracellular vesicles in plasma, and in situ time study of DNA immobilisation on the surface of magnetic nanoparticles. The high-resolution single particle size and zeta potential characterisation will provide a better understanding of nano-bio interactions, positively impacting nanomedicine development and their regulatory approval.
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Affiliation(s)
- Robert Vogel
- School of Mathematics and Physics, The University of Queensland, St Lucia, QLD 4072, Australia.
| | - Anoop K Pal
- Izon Science US Limited, 85 Bolton Street, STE 108, Cambridge, MA, 02140, USA
| | - Siddharth Jambhrunkar
- Mucosal Diseases Group, Translational Research Institute, The University of Queensland, 37 Kent St., Woolloongabba, QLD 4102, Australia
| | - Pragnesh Patel
- Izon Science US Limited, 85 Bolton Street, STE 108, Cambridge, MA, 02140, USA
| | - Sachin S Thakur
- School of Pharmacy, The University of Queensland, 20 Cornwall St., Woolloongabba, QLD 4102, Australia
| | - Eduardo Reátegui
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, 43210, USA
- The Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Harendra S Parekh
- School of Pharmacy, The University of Queensland, 20 Cornwall St., Woolloongabba, QLD 4102, Australia
| | - Paula Saá
- Scientific Affairs, American Red Cross, Rockville, MD, 20877, USA
| | | | - Murray F Broom
- Izon Science Limited, 8C Homersham Place, PO Box 39168, Burnside, Christchurch 8053, New Zealand
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17
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Giacometti G, Marini M, Papadopoulos K, Ferreri C, Chatgilialoglu C. trans-Double Bond-Containing Liposomes as Potential Carriers for Drug Delivery. Molecules 2017; 22:E2082. [PMID: 29182583 PMCID: PMC6149667 DOI: 10.3390/molecules22122082] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 11/25/2017] [Indexed: 12/20/2022] Open
Abstract
The use of liposomes has been crucial for investigations in biomimetic chemical biology as a membrane model and in medicinal chemistry for drug delivery. Liposomes are made of phospholipids whose biophysical characteristics strongly depend on the type of fatty acid moiety, where natural unsaturated lipids always have the double bond geometry in the cis configuration. The influence of lipid double bond configuration had not been considered so far with respect to the competence of liposomes in delivery. We were interested in evaluating possible changes in the molecular properties induced by the conversion of the double bond from cis to trans geometry. Here we report on the effects of the addition of trans-phospholipids supplied in different amounts to other liposome constituents (cholesterol, neutral phospholipids and cationic surfactants), on the size, ζ-potential and stability of liposomal formulations and on their ability to encapsulate two dyes such as rhodamine B and fluorescein. From a biotechnological point of view, trans-containing liposomes proved to have different characteristics from those containing the cis analogues, and to influence the incorporation and release of the dyes. These results open new perspectives in the use of the unnatural lipid geometry, for the purpose of changing liposome behavior and/or of obtaining molecular interferences, also in view of synergic effects of cell toxicity, especially in antitumoral strategies.
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Affiliation(s)
- Giorgia Giacometti
- Institute of Nanoscience and Nanotechnology, N.C.S.R. "Demokritos", 15310 Agia Paraskevi, Athens, Greece.
- Department of Experimental, Diagnostic and Specialty Medicine, School of Medicine, University of Bologna, Via Belmeloro 8, 40126 Bologna, Italy.
| | - Marina Marini
- Department of Experimental, Diagnostic and Specialty Medicine, School of Medicine, University of Bologna, Via Belmeloro 8, 40126 Bologna, Italy.
| | - Kyriakos Papadopoulos
- Institute of Nanoscience and Nanotechnology, N.C.S.R. "Demokritos", 15310 Agia Paraskevi, Athens, Greece.
| | - Carla Ferreri
- ISOF, Consiglio Nazionale Delle Ricerche, Via P. Gobetti 101, 40129 Bologna, Italy.
| | - Chryssostomos Chatgilialoglu
- Institute of Nanoscience and Nanotechnology, N.C.S.R. "Demokritos", 15310 Agia Paraskevi, Athens, Greece.
- ISOF, Consiglio Nazionale Delle Ricerche, Via P. Gobetti 101, 40129 Bologna, Italy.
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18
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Physicochemical characterization of lauryl glycinate-dodecyl sulfate equimolar complex: A base-triggerable catanionic liposomal system. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Yang MM, Wilson WR, Wu Z. pH-Sensitive PEGylated liposomes for delivery of an acidic dinitrobenzamide mustard prodrug: Pathways of internalization, cellular trafficking and cytotoxicity to cancer cells. Int J Pharm 2017; 516:323-333. [DOI: 10.1016/j.ijpharm.2016.11.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 11/04/2016] [Accepted: 11/18/2016] [Indexed: 11/25/2022]
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20
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Chiralt A, Fito P. Transport Mechanisms in Osmotic Dehydration: The Role of the Structure. FOOD SCI TECHNOL INT 2016. [DOI: 10.1177/1082013203034757] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Osmotic dehydration promotes water release from a cellular material immersed in a concentrated solution, while a simultaneous external solute uptake happens. Mass transfer occurs during this operation through different mechanisms to a different extent depending on process variables. The action of the different mechanisms, balanced by controlling those variables, makes possible to achieve a specific dewateringsolute uptake ratio in the final product. Mechanisms involved in mass transfer during osmodehydration of cellular tissues depend on the structural level of the tissue. The external broken cells can be easily impregnated by the external solution, and in the intercellular spaces, bulk flow of solution, water and solute diffusion occur. The bulk flow is promoted due to capillary pressure in processes carried out at atmospheric pressure. Nevertheless, when vacuum is applied to the system, capillary impregnation is promoted and when the atmospheric pressure is restored, pores are extensively flooded with the external solution and depending on the applied compression ratio. Mass transport in the intercellular spaces is mainly responsible for solute gain. At cellular level, cell wall and membranes act as non-selective and selective barriers respectively to mass transport and the transmembrane flux is responsible for most of the cell-to-cell water transport during osmotic dehydration of tissues.
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Affiliation(s)
- A. Chiralt
- Departamento de Tecnología de Alimentos, Instituto de Ingeniería de Alimentos para el Desarrollo (IAD), Universidad Politécnica de Valencia, Camino de Vera s/n, 46071 Valencia, Spain
| | - P. Fito
- Departamento de Tecnología de Alimentos, Instituto de Ingeniería de Alimentos para el Desarrollo (IAD), Universidad Politécnica de Valencia, Camino de Vera s/n, 46071 Valencia, Spain
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21
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Yingchoncharoen P, Kalinowski DS, Richardson DR. Lipid-Based Drug Delivery Systems in Cancer Therapy: What Is Available and What Is Yet to Come. Pharmacol Rev 2016; 68:701-87. [PMID: 27363439 PMCID: PMC4931871 DOI: 10.1124/pr.115.012070] [Citation(s) in RCA: 431] [Impact Index Per Article: 53.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cancer is a leading cause of death in many countries around the world. However, the efficacy of current standard treatments for a variety of cancers is suboptimal. First, most cancer treatments lack specificity, meaning that these treatments affect both cancer cells and their normal counterparts. Second, many anticancer agents are highly toxic, and thus, limit their use in treatment. Third, a number of cytotoxic chemotherapeutics are highly hydrophobic, which limits their utility in cancer therapy. Finally, many chemotherapeutic agents exhibit short half-lives that curtail their efficacy. As a result of these deficiencies, many current treatments lead to side effects, noncompliance, and patient inconvenience due to difficulties in administration. However, the application of nanotechnology has led to the development of effective nanosized drug delivery systems known commonly as nanoparticles. Among these delivery systems, lipid-based nanoparticles, particularly liposomes, have shown to be quite effective at exhibiting the ability to: 1) improve the selectivity of cancer chemotherapeutic agents; 2) lower the cytotoxicity of anticancer drugs to normal tissues, and thus, reduce their toxic side effects; 3) increase the solubility of hydrophobic drugs; and 4) offer a prolonged and controlled release of agents. This review will discuss the current state of lipid-based nanoparticle research, including the development of liposomes for cancer therapy, different strategies for tumor targeting, liposomal formulation of various anticancer drugs that are commercially available, recent progress in liposome technology for the treatment of cancer, and the next generation of lipid-based nanoparticles.
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Affiliation(s)
- Phatsapong Yingchoncharoen
- Molecular Pharmacology and Pathology Program, Department of Pathology, Faculty of Medicine, Bosch Institute, The University of Sydney, Sydney, NSW, Australia
| | - Danuta S Kalinowski
- Molecular Pharmacology and Pathology Program, Department of Pathology, Faculty of Medicine, Bosch Institute, The University of Sydney, Sydney, NSW, Australia
| | - Des R Richardson
- Molecular Pharmacology and Pathology Program, Department of Pathology, Faculty of Medicine, Bosch Institute, The University of Sydney, Sydney, NSW, Australia
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22
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Liu D, Zhang J, Xu S, Liu H. Membrane property and biofunction of phospholiposome incorporated with anomeric galactolipids. SPRINGERPLUS 2016; 5:655. [PMID: 27330921 PMCID: PMC4870520 DOI: 10.1186/s40064-016-2236-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/26/2016] [Indexed: 11/21/2022]
Abstract
There has been increasing interest in the construction of liposomes containing a targeting reagent for target-specific drug delivery. Glycoconjugates that can be recognized by transmembrane glycoprotein receptors have been extensively used to form glyco-liposomal drug carriers. However, the impact of anomerism, which is a common identity of natural glycoconjugates, on the glyco-liposomal properties has been hardly probed in previous studies. Here we investigate the liposomal properties of phospholipid incorporated with a pair of anomeric galactolipids. The anomeric galacto-liposomes are characterized and their membrane fluidity, thermo-stability, DNA condensation efficiency and fluorescence leakage are comparatively tested. The in vitro cellular internalization effect of the galacto-liposomes is also demonstrated. This study suggests that anomerism might give distinct impact on the membrane properties and even biofunctions of glyco-liposomes.
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Affiliation(s)
- Danyang Liu
- />Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237 People’s Republic of China
| | - Junqi Zhang
- />Key Laboratory of Medical Molecular Virology (Ministry of Health and Ministry of Education), School of Basic Medical Sciences, Fudan University, 138 Yixueyuan Rd, Shanghai, 200032 People’s Republic of China
| | - Shouhong Xu
- />Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237 People’s Republic of China
| | - Honglai Liu
- />Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Rd, Shanghai, 200237 People’s Republic of China
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23
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Mechanisms and biomaterials in pH-responsive tumour targeted drug delivery: A review. Biomaterials 2016; 85:152-67. [PMID: 26871891 DOI: 10.1016/j.biomaterials.2016.01.061] [Citation(s) in RCA: 619] [Impact Index Per Article: 77.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 12/12/2022]
Abstract
As the mainstay in the treatment of various cancers, chemotherapy plays a vital role, but still faces many challenges, such as poor tumour selectivity and multidrug resistance (MDR). Targeted drug delivery using nanotechnology has provided a new strategy for addressing the limitations of the conventional chemotherapy. In the last decade, the volume of research published in this area has increased tremendously, especially with functional nano drug delivery systems (nanocarriers). Coupling a specific stimuli-triggered drug release mechanism with these delivery systems is one of the most prevalent approaches for improving therapeutic outcomes. Among the various stimuli, pH triggered delivery is regarded as the most general strategy, targeting the acidic extracellular microenvironment and intracellular organelles of solid tumours. In this review, we discuss recent advances in the development of pH-sensitive nanocarriers for tumour-targeted drug delivery. The review focuses on the chemical design of pH-sensitive biomaterials, which are used to fabricate nanocarriers for extracellular and/or intracellular tumour site-specific drug release. The pH-responsive biomaterials bring forth conformational changes in these nanocarriers through various mechanisms such as protonation, charge reversal or cleavage of a chemical bond, facilitating tumour specific cell uptake or drug release. A greater understanding of these mechanisms will help to design more efficient drug delivery systems to address the challenges encountered in conventional chemotherapy.
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24
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Barragán Vidal IA, Rosetti CM, Pastorino C, Müller M. Measuring the composition-curvature coupling in binary lipid membranes by computer simulations. J Chem Phys 2015; 141:194902. [PMID: 25416907 DOI: 10.1063/1.4901203] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The coupling between local composition fluctuations in binary lipid membranes and curvature affects the lateral membrane structure. We propose an efficient method to compute the composition-curvature coupling in molecular simulations and apply it to two coarse-grained membrane models-a minimal, implicit-solvent model and the MARTINI model. Both the weak-curvature behavior that is typical for thermal fluctuations of planar bilayer membranes as well as the strong-curvature regime corresponding to narrow cylindrical membrane tubes are studied by molecular dynamics simulation. The simulation results are analyzed by using a phenomenological model of the thermodynamics of curved, mixed bilayer membranes that accounts for the change of the monolayer area upon bending. Additionally the role of thermodynamic characteristics such as the incompatibility between the two lipid species and asymmetry of composition are investigated.
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Affiliation(s)
- I A Barragán Vidal
- Institut für Theoretische Physik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
| | - C M Rosetti
- Centro de Investigaciones en Química Biológica de Córdoba, Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - C Pastorino
- Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, CNEA/CONICET, Av. Gral. Paz 1499, 1650 Pcia. de Buenos Aires, Argentina
| | - M Müller
- Institut für Theoretische Physik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
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25
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Wölk C, Janich C, Meister A, Drescher S, Langner A, Brezesinski G, Bakowsky U. Investigation of Binary Lipid Mixtures of a Three-Chain Cationic Lipid with Phospholipids Suitable for Gene Delivery. Bioconjug Chem 2015; 26:2461-73. [PMID: 26471337 DOI: 10.1021/acs.bioconjchem.5b00505] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the present work, we characterize binary lipid mixtures consisting of a three-chain amino-functionalized cationic lipid (DiTT4) with different phospholipids, namely, 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE), 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine (DMPE), or 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). The mixing behavior was investigated by differential scanning calorimetry (DSC). Additionally, aqueous dispersions of the binary mixtures were characterized by means of dynamic light scattering (DLS), laser Doppler electrophoresis, and transmission electron microscopy (TEM) to get further information about particle size, charge, and shape. The complex formation between different binary lipid mixtures and plasmid DNA (pDNA) was investigated by zeta-(ζ)-potential (laser Doppler electrophoresis) and DLS measurements, and the lipid/DNA complexes (lipoplexes) were screened for efficient DNA transfer (transfection) in cell culture. Finally, efficient lipid compositions were investigated with respect to serum stability. This work provides a detailed characterization of the cationic lipid mixtures as foundation for further research. Efficient gene transfer in the presence of serum was demonstrated for selected lipoplexes showing their capability to be used as high-potency gene delivery vehicles.
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Affiliation(s)
- Christian Wölk
- Philipps University Marburg , Department of Pharmaceutical Technology and Biopharmaceutics, Ketzerbach 63, 35037 Marburg, Germany.,Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Christopher Janich
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Annette Meister
- MLU Halle-Wittenberg , Center for Structure and Dynamics of Proteins (MZP), Weinbergweg 22, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Andreas Langner
- Martin Luther University (MLU) Halle-Wittenberg , Institute of Pharmacy, Wolfgang-Langenbeck-Strasse 4, 06120 Halle (Saale), Germany
| | - Gerald Brezesinski
- Max Planck Institute of Colloids and Interfaces , Science Park Potsdam-Golm, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Udo Bakowsky
- Philipps University Marburg , Department of Pharmaceutical Technology and Biopharmaceutics, Ketzerbach 63, 35037 Marburg, Germany
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26
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Crowe JH, Crowe LM, Hoekstra FA, Wistrom CA. Effects of Water on the Stability of Phospholipid Bilayers: The Problem of Imbibition Damage in Dry Organisms. SEED MOISTURE 2015. [DOI: 10.2135/cssaspecpub14.c1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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27
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Garidel P, Kaconis Y, Heinbockel L, Wulf M, Gerber S, Munk A, Vill V, Brandenburg K. Self-Organisation, Thermotropic and Lyotropic Properties of Glycolipids Related to their Biological Implications. Open Biochem J 2015; 9:49-72. [PMID: 26464591 PMCID: PMC4598379 DOI: 10.2174/1874091x01509010049] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 02/27/2014] [Accepted: 03/18/2014] [Indexed: 11/22/2022] Open
Abstract
Glycolipids are amphiphilic molecules which bear an oligo- or polysaccharide as hydrophilic head group and hydrocarbon chains in varying numbers and lengths as hydrophobic part. They play an important role in life science as well as in material science. Their biological and physiological functions are quite diverse, ranging from mediators of cell-cell recognition processes, constituents of membrane domains or as membrane-forming units. Glycolipids form an exceptional class of liquid-crystal mesophases due to the fact that their self-organisation obeys more complex rules as compared to classical monophilic liquid-crystals. Like other amphiphiles, the supra-molecular structures formed by glycolipids are driven by their chemical structure; however, the details of this process are still hardly understood. Based on the synthesis of specific glycolipids with a clearly defined chemical structure, e.g., type and length of the sugar head group, acyl chain linkage, substitution pattern, hydrocarbon chain lengths and saturation, combined with a profound physico-chemical characterisation of the formed mesophases, the principles of the organisation in different aggregate structures of the glycolipids can be obtained. The importance of the observed and formed phases and their properties are discussed with respect to their biological and physiological relevance. The presented data describe briefly the strategies used for the synthesis of the used glycolipids. The main focus, however, lies on the thermotropic as well as lyotropic characterisation of the self-organised structures and formed phases based on physico-chemical and biophysical methods linked to their potential biological implications and relevance.
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Affiliation(s)
- Patrick Garidel
- Physikalische Chemie, Martin-Luther-Universität Halle/Wittenberg, Mühlpforte 1, D-06108 Halle/Saale, Germany
| | - Yani Kaconis
- Forschungszentrum Borstel, Leibniz-Zentrum für Medizin und Biowissenschaften, Parkallee 1-40, D-23845 Borstel, Germany
| | - Lena Heinbockel
- Forschungszentrum Borstel, Leibniz-Zentrum für Medizin und Biowissenschaften, Parkallee 1-40, D-23845 Borstel, Germany
| | - Matthias Wulf
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Sven Gerber
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Ariane Munk
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Volkmar Vill
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
| | - Klaus Brandenburg
- Forschungszentrum Borstel, Leibniz-Zentrum für Medizin und Biowissenschaften, Parkallee 1-40, D-23845 Borstel, Germany
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Fong C, Dong AW, Hill AJ, Boyd BJ, Drummond CJ. Positron annihilation lifetime spectroscopy (PALS): a probe for molecular organisation in self-assembled biomimetic systems. Phys Chem Chem Phys 2015; 17:17527-40. [DOI: 10.1039/c5cp01921d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Positron annihilation lifetime spectroscopy (PALS) has been shown to be highly sensitive to conformational, structural and microenvironmental transformations arising from subtle geometric changes in molecular geometry in self-assembling biomimetic systems.
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Affiliation(s)
- Celesta Fong
- CSIRO Manufacturing Flagship
- Clayton
- Australia
- School of Applied Sciences
- College of Science Engineering and Health
| | - Aurelia W. Dong
- CSIRO Manufacturing Flagship
- Clayton
- Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology
- Monash Institute of Pharmaceutical Sciences
| | | | - Ben J. Boyd
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology
- Monash Institute of Pharmaceutical Sciences
- Monash University (Parkville Campus)
- Parkville
- Australia
| | - Calum J. Drummond
- CSIRO Manufacturing Flagship
- Clayton
- Australia
- School of Applied Sciences
- College of Science Engineering and Health
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Klacsová M, Karlovská J, Uhríková D, Funari SS, Balgavý P. Phase behavior of the DOPE + DOPC + alkanol system. SOFT MATTER 2014; 10:5842-5848. [PMID: 24980804 DOI: 10.1039/c4sm00530a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Small- and wide-angle X-ray diffraction was used to study the effect of 1-alkanols, as simple models of general anesthetics, (abbreviation CnOH, n = 8-18 is the even number of carbons in the aliphatic chain) on the lamellar to hexagonal Lα→ H(II) phase transition in the dioleoylphosphatidylethanolamine-dioleoylphosphatidylcholine = 3 : 1 mol/mol (DOPE + DOPC) system. All studied CnOHs were found to decrease the phase transition temperature of the DOPE + DOPC system in a CnOH chain length and concentration dependent manner and thus promote the formation of the HII phase. Anesthetically active C8OH and C10OH were found to decrease the lattice parameter d of the Lα phase, however longer non-anesthetic CnOHs increased the parameter d; this effect being more pronounced with increasing CnOH concentration. The lattice parameter of the HII phase was decreased in the presence of all CnOHs, even at the lowest concentrations studied. In the scope of the indirect mechanism of general anesthesia observed changes in the lattice parameter d (reflecting changes in the bilayer thickness) due to the intercalation of C8OH and C10OH might induce changes in the activity of integral membrane proteins engaged in neuronal pathways.
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Affiliation(s)
- Mária Klacsová
- Department of Physical Chemistry of Drugs, Faculty of Pharmacy, Comenius University, Odbojárov 10, SK-832 32 Bratislava, Slovakia.
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Nilsson C, Østergaard J, Larsen SW, Larsen C, Urtti A, Yaghmur A. PEGylation of phytantriol-based lyotropic liquid crystalline particles--the effect of lipid composition, PEG chain length, and temperature on the internal nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6398-6407. [PMID: 24833115 DOI: 10.1021/la501411w] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Poly(ethylene glycol)-grafted 1,2-distearoyl-sn-glycero-3-phosphoethanolamines (DSPE-mPEGs) are a family of amphiphilic lipopolymers attractive in formulating injectable long-circulating nanoparticulate drug formulations. In addition to long circulating liposomes, there is an interest in developing injectable long-circulating drug nanocarriers based on cubosomes and hexosomes by shielding and coating the dispersed particles enveloping well-defined internal nonlamellar liquid crystalline nanostructures with hydrophilic PEG segments. The present study attempts to shed light on the possible PEGylation of these lipidic nonlamellar liquid crystalline particles by using DSPE-mPEGs with three different block lengths of the hydrophilic PEG segment. The effects of lipid composition, PEG chain length, and temperature on the morphology and internal nanostructure of these self-assembled lipidic aqueous dispersions based on phytantriol (PHYT) were investigated by means of synchrotron small-angle X-ray scattering and Transmission Electron Cryo-Microscopy. The results suggest that the used lipopolymers are incorporated into the water-PHYT interfacial area and induce a significant effect on the internal nanostructures of the dispersed submicrometer-sized particles. The hydrophilic domains of the internal liquid crystalline nanostructures of these aqueous dispersions are functionalized, i.e., the hydrophilic nanochannels of the internal cubic Pn3m and Im3m phases are significantly enlarged in the presence of relatively small amounts of the used DSPE-mPEGs. It is evident that the partial replacement of PHYT by these PEGylated lipids could be an attractive approach for the surface modification of cubosomal and hexosomal particles. These PEGylated nanocarriers are particularly attractive in designing injectable cubosomal and hexosomal nanocarriers for loading drugs and/or imaging probes.
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Affiliation(s)
- Christa Nilsson
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Paliwal SR, Paliwal R, Vyas SP. A review of mechanistic insight and application of pH-sensitive liposomes in drug delivery. Drug Deliv 2014; 22:231-42. [PMID: 24524308 DOI: 10.3109/10717544.2014.882469] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The pH-sensitive liposomes have been extensively used as an alternative to conventional liposomes in effective intracellular delivery of therapeutics/antigen/DNA/diagnostics to various compartments of the target cell. Such liposomes are destabilized under acidic conditions of the endocytotic pathway as they usually contain pH-sensitive lipid components. Therefore, the encapsulated content is delivered into the intracellular bio-environment through destabilization or its fusion with the endosomal membrane. The therapeutic efficacy of pH-sensitive liposomes enables them as biomaterial with commercial utility especially in cancer treatment. In addition, targeting ligands including antibodies can be anchored on the surface of pH-sensitive liposomes to target specific cell surface receptors/antigen present on tumor cells. These vesicles have also been widely explored for antigen delivery and serve as immunological adjuvant to enhance the immune response to antigens. The present review deals with recent research updates on application of pH-sensitive liposomes in chemotherapy/diagnostics/antigen/gene delivery etc.
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Affiliation(s)
- Shivani Rai Paliwal
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya Bilaspur , Chhattisgarh , India
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32
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McCarley RL, Forsythe JC, Loew M, Mendoza MF, Hollabaugh NM, Winter JE. Release rates of liposomal contents are controlled by kosmotropes and chaotropes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13991-5. [PMID: 24160736 PMCID: PMC3932753 DOI: 10.1021/la402740k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Contents release from redox-responsive liposomes is anion-specific. Liposomal contents release is initiated by the contact of apposed liposome bilayers having in their outer leaflet 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE), whose presence is due to the redox-stimulated removal of a quinone propionic acid protecting group (Q) from Q-DOPE lipids. Contents release occurs upon the phase transition of DOPE from its lamellar liquid-crystalline phase (Lα) to its hexagonal-II inverted micelle (HII) phase. Contents release is slower in the presence of weakly hydrated chaotropic anions versus highly hydrated kosmotropic anions and is attributed to ion accumulation near the zwitterionic DOPE headgroups, in turn altering the headgroup hydration, as indicated by the Lα → HII phase transition temperature, TH, for DOPE. The results are significant, not only for mechanistic aspects of liposome contents release in DOPE-based systems but also for drug delivery applications wherein exist at drug targeting sites variations in the type and concentration of ions and neutral species.
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Abstract
In recent years, liposomes have been employed with growing success as pharmaceutical carriers for antineoplastic drugs. One specific strategy used to enhance in vivo liposome-mediated drug delivery is the improvement of intracytoplasmic delivery. In this context, pH-sensitive liposomes (pHSLip) have been designed to explore the endosomal acidification process, which may lead to a destabilization of the liposomes, followed by a release of their contents into the cell cytoplasm. This review considers the current status of pHSLip development and its applicability in cancer treatment, focusing on the mechanisms of pH sensitivity and liposomal composition of pHSLip. The final section will discuss the application of these formulations in both in vitro and in vivo studies of antitumor efficacy.
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Loew M, Forsythe JC, McCarley RL. Lipid nature and their influence on opening of redox-active liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6615-23. [PMID: 23698020 PMCID: PMC3778659 DOI: 10.1021/la304340e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The pathway for content release from reduction-sensitive liposomes based on a quinone-dioleoylphosphatidylethanolamine lipid conjugate (Q-DOPE) is outlined using results from fluorescent dye content release assays as well as single- and multiple-angle light scattering. Experimental observations are consistent with a shape/size change of the reduced liposomes prior to their aggregation, with subsequent near-quantitative content release achieved only when the lipid membrane experiences conditions favorable to a lamellar to an inverted hexagonal phase transition. Addition of poly(ethyleneglycol)-modified DOPE (PEG-DOPE) to the Q-DOPE liposomal formulation results in stabilization of the lipid bilayer, whereas incorporation of DOPE yields faster content release. At high DOPE concentrations, DOPE/PEG-DOPE/Q-DOPE liposomes exhibit larger content release, indicating a change in pathway for content release. The outcomes here provide a better understanding of the underlying principles of triggered liposomal content release and the potential utility of specific lipid properties for the rational design of drug delivery systems based on the novel Q-DOPE lipid.
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Affiliation(s)
| | | | - Robin L. McCarley
- CORRESPONDING AUTHOR: Telephone: (225) 578-3239. Facsimile: (225) 578-3458.
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35
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Smith EA, Dea PK. Influence of the interdigitated gel phase in mixtures of ether-linked and monofluorinated ester-linked phospholipids. Chem Phys Lipids 2012; 165:818-25. [DOI: 10.1016/j.chemphyslip.2012.10.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 10/25/2012] [Accepted: 10/26/2012] [Indexed: 10/27/2022]
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Tenchov B, Koynova R. Cubic phases in membrane lipids. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2012; 41:841-50. [DOI: 10.1007/s00249-012-0819-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Accepted: 04/21/2012] [Indexed: 11/29/2022]
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37
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Water adsorption isotherms of lipids. Biophys J 2012; 101:2704-12. [PMID: 22261059 DOI: 10.1016/j.bpj.2011.10.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 09/26/2011] [Accepted: 10/12/2011] [Indexed: 11/21/2022] Open
Abstract
Hydration of bilayer lipids is a fundamental property of biological membranes. The available database of lipid hydration isotherms is fitted over the entire range of water activities by using a statistical mechanical approach that is an extension of the common Brunauer-Emmett-Teller model, to include differential energies of association for water molecules beyond the first strongly bound layer. Three-parameter fits are obtained that can be used to represent the experimental isotherms to a good degree of accuracy over the complete range of water-binding activities. Fits are also made in terms of the hydration pressure and correlation length of water ordering, by using the polarization theory of lipid hydration. The relationship of the latter approach to measurements of hydration forces between lipid bilayers is discussed.
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38
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Quinn PJ. The structure of complexes between phosphatidylethanolamine and glucosylceramide: A matrix for membrane rafts. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:2894-904. [DOI: 10.1016/j.bbamem.2011.08.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 08/22/2011] [Accepted: 08/30/2011] [Indexed: 12/12/2022]
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39
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Yano Y, Yamamoto A, Ogura M, Matsuzaki K. Thermodynamics of Insertion and Self-Association of a Transmembrane Helix: A Lipophobic Interaction by Phosphatidylethanolamine. Biochemistry 2011; 50:6806-14. [DOI: 10.1021/bi200560c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshiaki Yano
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Sakyo-ku, Kyoto
606-8501, Japan
| | - Arisa Yamamoto
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Sakyo-ku, Kyoto
606-8501, Japan
| | - Mai Ogura
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Sakyo-ku, Kyoto
606-8501, Japan
| | - Katsumi Matsuzaki
- Graduate School of Pharmaceutical
Sciences, Kyoto University, Sakyo-ku, Kyoto
606-8501, Japan
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40
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Kett PJN, Casford MTL, Davies PB. Structure of mixed phosphatidylethanolamine and cholesterol monolayers in a supported hybrid bilayer membrane studied by sum frequency generation vibrational spectroscopy. J Phys Chem B 2011; 115:6465-73. [PMID: 21542565 DOI: 10.1021/jp1112685] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The structure of hybrid bilayer membranes (HBMs) containing either a pure cholesterol or mixed cholesterol/dipalmitoylphosphatidylethanolamine (DPPE) proximal layer adsorbed onto an octadecanethiol (ODT) self-assembled monolayer (SAM) on a gold substrate have been investigated by sum frequency generation (SFG) spectroscopy. The HBMs were formed by the adsorption of either a pure cholesterol or mixed DPPE/cholesterol monolayer from the air/water interface of a Langmuir-Blodgett trough at surface pressures of 1, 20, or 40 mN·m(-1). SFG spectra were also recorded of HBMs where cholesterol was replaced by cholesterol-d(7), in which the terminal isopropyl group of the alkyl chain of cholesterol was isotopically labeled. In order to isolate the contribution to the SFG spectra from the cholesterol in the mixed cholesterol/phospholipid films, DPPE-d was used, in which the alkyl chains of the phospholipid were deuterated. The infrared spectra of solvent-cast cholesterol and cholesterol-d(7) films were recorded to aid with assignment of the SFG spectra of the HBMs. Features corresponding to methyl, methylene, and methine stretches of cholesterol were identified in the SFG spectra. Information on the polar orientation of SFG-active groups was obtained from the phases of the spectral features. The structure of the HBMs showed little dependence on the surface pressure at which they were formed. SFG spectra of HBMs with a mixed cholesterol/DPPE proximal layer were very similar to the spectra of HBMs with a pure cholesterol proximal layer, although the features in the spectra were more intense than anticipated for a film with half the number of cholesterol molecules, indicating that DPPE did have some effect on the orientation of cholesterol molecules in the film.
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Affiliation(s)
- P J N Kett
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
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41
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Balamurali V, Pramodkuma T, Srujana N, Venkatesh M, Gupta NV, Krishna K, Gangadhara H. pH Sensitive Drug Delivery Systems: A Review. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/ajdd.2011.24.48] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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42
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Wu FG, Luo JJ, Yu ZW. Infrared spectroscopy reveals the nonsynchronicity phenomenon in the glassy to fluid micellar transition of DSPE-PEG2000 aqueous dispersions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:12777-12784. [PMID: 20590119 DOI: 10.1021/la101539z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
One challenging question regarding the phase transition mechanism of amphiphiles is to seek the roles individual groups/portions of the amphiphilic molecule play during the transformation. To address this question, we selected a poly(ethylene glycol)-grafted phospholipid, distearoylphosphatidylethanolamine-N-[methoxy(poly(ethylene glycol))-2000] (DSPE-PEG2000), to study its glassy to fluid micellar phase transition by using differential scanning calorimetry and Fourier transform infrared (FTIR) spectroscopy. FTIR results revealed that during the glassy to fluid micellar transition, the lipid acyl tails have evident conformational rearrangements but undergo only slight modifications in the packing state. For the lipid interface region, small changes in the hydration state of C=O groups were observed, whereas for the lipid headgroups (NHCO and PO(4)(-)), their conformation and hydration states remain unchanged. Thus, the head, the interface, and the tail regions of DSPE-PEG2000 molecules change nonsynchronously during the transition. As to the bulky PEG corona residing at the outer micellar surface, no evident hydration state change was observed upon heating, and its behavior is almost the same as that of the hydrated free PEG2000 molecules. Such a nonsynchronous change in different parts of the self-assembled amphiphilic aggregates undergoing phase transition could be a common phenomenon that needs to be widely recognized.
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Affiliation(s)
- Fu-Gen Wu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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43
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Abstract
Three synthetically produced glycolipids, N-(beta-D-glucopyranosyl)-N-octadecyl-stearoylamide (OSGA), N-(beta-D-glucopyranosyl-N-octadecyl-oleoylamide (OOGA), N-(beta-D-galactopyranosyl)-N-octadecyl-lauroylamide (OLGA) have been studied in different mixtures with water by x-ray diffraction and dielectric measurements with microwaves at 9.4 GHz. The measurements were performed in the temperature range -50-70 degrees C. X-Ray diffraction revealed a direct L(beta') --> H( parallel) transition at 20 degrees C, 60 degrees C, and 45 degrees C depending on the glycolipid species but nearly not on the water content. The hexagonal phases are saturated at a water content of approximately 20 wt%. The lamellar phase absorbs even less water (< 10 wt%). The dielectric data show that in the H( parallel) phase the binding of water is stronger than in the L(beta') phase. In the temperature range below 0 degrees C, OSGA and OOGA show a "subzero transition" due to the freeze-out of water in a separate ice phase. This transition can be seen in an abrupt decrease of the dielectric function because the dielectric response of ice is much smaller at microwave frequencies. OLGA does not show the subzero transition but an additional transition, hexagonal --> distorted hexagonal at 60 degrees C.
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44
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Yao H, Hatta I, Koynova R, Tenchov B. Time-resolved x-ray diffraction and calorimetric studies at low scan rates: II. On the fine structure of the phase transitions in hydrated dipalmitoylphosphatidylethanolamine. Biophys J 2010; 61:683-93. [PMID: 19431820 DOI: 10.1016/s0006-3495(92)81873-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
The phase transitions of dipalmitoylphosphatidylethanolamine (DPPE) in excess water have been examined by low-angle time-resolved x-ray diffraction and calorimetry at low scan rates. The lamellar subgel/lamellar liquid-crystalline (L(c) --> L(alpha)), lamellar gel/lamellar liquid-crystalline (L(beta) --> L(alpha)), and lamellar liquid-crystalline/lamellar gel (L(alpha) --> L(beta)) phase transitions proceed via coexistence of the initial and final phases with no detectable intermediates at scan rates 0.1 and 0.5 degrees C/min. At constant temperature within the region of the L(beta) --> L(alpha) transition the ratio of the two coexisting phases was found to be stable for over 30 min. The state of stable phase coexistence was preceded by a 150-s relaxation taking place at constant temperature after termination of the heating scan in the transition region. While no intermediate structures were present in the coexistence region, a well reproducible multipeak pattern, with at least four prominent heat capacity peaks separated in temperature by 0.4-0.5 degrees C, has been observed in the cooling transition (L(alpha) --> L(beta)) by calorimetry. The multipeak pattern became distinct with an increase of incubation time in the liquid-crystalline phase. It was also clearly resolved in the x-ray diffraction intensity versus temperature plots recorded at slow cooling rates. These data suggest that the equilibrium state of the L(alpha) phase of hydrated DPPE is represented by a mixture of domains that differ in thermal behavior, but cannot be distinguished structurally by x-ray scattering.
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Affiliation(s)
- H Yao
- Department of Applied Physics, School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-01, Japan
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45
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Kett PJN, Casford MTL, Davies PB. Sum frequency generation (SFG) vibrational spectroscopy of planar phosphatidylethanolamine hybrid bilayer membranes under water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:9710-9719. [PMID: 20394443 DOI: 10.1021/la1003512] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Sum frequency generation (SFG) spectroscopy has been used to study the structure of phosphatidylethanolamine hybrid bilayer membranes (HBMs) under water at ambient temperatures. The HBMs were formed using a modified Langmuir-Schaefer technique and consisted of a layer of dipalmitoyl phosphatidylethanolamine (DPPE) physisorbed onto an octadecanethiol (ODT) self-assembled monolayer (SAM) at a series of surface pressures from 1 to 40 mN m(-1). The DPPE and ODT were selectively deuterated so that the contributions to the SFG spectra from the two layers could be determined separately. SFG spectra in both the C-H and C-D stretching regions confirmed that a monolayer of DPPE had been adsorbed to the ODT SAM and that there were gauche defects within the alkyl chains of the phospholipid. On adsorption of a layer of DPPE, methylene modes from the ODT SAM were detected, indicating that the phospholipid had partially disordered the alkanethiol monolayer. SFG spectra recorded in air indicated that removal of water from the surface of the HBM resulted in disruption of the DPPE layer and the formation of phospholipid bilayers.
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Affiliation(s)
- Peter J N Kett
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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46
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Riegler H, Eugel M. On the Electrostatic Component of the Adhesional Interaction between Solid Substrates and Langmuir Monolayers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910951121] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Tamai N, Goto M, Matsuki H, Kaneshina S. A mechanism of pressure-induced interdigitation of lipid bilayers. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/215/1/012161] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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48
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Lee J, Young SA, Kellaway IW. Water quantitatively induces the mucoadhesion of liquid crystalline phases of glyceryl monooleate. J Pharm Pharmacol 2010; 53:629-36. [PMID: 11370702 DOI: 10.1211/0022357011775956] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
The possible role of water inthe mucoadhesion phenomenon exhibitedby the liquid crystalline phases of glyceryl monooleate was investigated using an in-vitro tensile strength technique. The mucoadhesion of the liquid crystalline phases of glyceryl monooleate was found to occur following uptake of water. The mucoadhesive force of the cubic phase was consistent since it is not capable of taking up additional water. An increase in pre-load period greatly facilitated the mucoadhesion of glyceryl monooleate (0% w/w initial water content), suggesting that the mucoadhesion is dependent upon the extent of the dehydration of the substrate. A good linear relationship between initial water content of the liquid crystalline phases and mucoadhesive force led to the conclusion that the mucoadhesive force increased with decreasing initial water concentration. Rheological properties of the liquid crystalline phases were also studied to allow a correlation between physical changes and mucoadhesion of the liquid crystalline phases, revealing that higher water concentrations in the liquid crystalline phases led to a more ordered structure that showed less mucoadhesion. The results of this study indicated that the mucoadhesive force ofthe liquid crystalline phases of glyceryl monooleate is determined by the capability to take up water from a water-rich environment. It may, therefore, be advantageous to use the lamellar phase as a buccal drug carrier as opposed to the relatively less mucoadhesive cubic phase.
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Affiliation(s)
- J Lee
- The Welsh School of Pharmacy, University of Wales, Cardiff, UK
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49
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Marsh D. Structural and thermodynamic determinants of chain-melting transition temperatures for phospholipid and glycolipids membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:40-51. [DOI: 10.1016/j.bbamem.2009.10.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Revised: 10/07/2009] [Accepted: 10/14/2009] [Indexed: 11/25/2022]
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50
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Kastantin M, Ananthanarayanan B, Karmali P, Ruoslahti E, Tirrell M. Effect of the lipid chain melting transition on the stability of DSPE-PEG(2000) micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:7279-86. [PMID: 19358585 PMCID: PMC2756452 DOI: 10.1021/la900310k] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Micellar nanoparticles are showing promise as carriers of diagnostic and therapeutic biofunctionality, leading to increased interest in their properties and behavior, particularly their size, shape, and stability. This work investigates the physical chemistry of micelles formed from DSPE-PEG(2000) monomers as it pertains to these properties. A melting transition in the lipid core of spheroidal DSPE-PEG(2000) micelles is observed as an endothermic peak at 12.8 degrees C upon heating in differential scanning calorimetry thermograms. Bulky PEG(2000) head groups prevent regular crystalline packing of lipids in both the low-temperature glassy and high-temperature fluid phases, as evidenced by wide-angle X-ray scattering. Equilibrium micelle geometry is spheroidal above and below the transition temperature, indicating that the entropic penalty to force the PEG brush into flat geometry is greater than the enthalpic benefit to the glassy core to pack in an extended configuration. Increased micelle stability is seen in the glassy phase with monomer desorption rates significantly lower than in the fluid phase. Activation energies for monomer desorption are 156+/-6.7 and 79+/-5.0 kJ/mol for the glassy and fluid phases, respectively. The observation of a glass transition that increases micelle stability but does not perturb micelle geometry is useful for the design of more effective biofunctional micelles.
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Affiliation(s)
- Mark Kastantin
- Department of Chemical Engineering, University of California, Santa Barbara, CA, USA
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