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Aravindan D, Alagan AA, Heidelberg T, Cheng SF, Duali Hussen RS. Enhanced assembly stability for amine-based cationic glycolipid. Carbohydr Res 2024; 543:109224. [PMID: 39084163 DOI: 10.1016/j.carres.2024.109224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 07/16/2024] [Accepted: 07/28/2024] [Indexed: 08/02/2024]
Abstract
Glycolipids incorporating positive charges, mediated by an imidazolium cation, have shown potential for effective formulation of vesicular drug carriers, reflecting repulsive electrostatic forces, promoting the formation of nanosized assemblies and preventing unwanted Oswald ripening (Goh et al. (2019), ACS Omega 4, 17,039). Our continuous development of an assembly-based drug delivery system prompted us to investigate a pH-sensitive analogue, leading to the synthesis of a 6-amino-Guerbet glycoside. However, in contrast to the imidazolium counterpart, the amine-mediated charge increased the intermolecular cohesions, furnishing bigger assemblies instead, which further increased upon introduction of acid. Moreover, assemblies exhibited a significantly reduced positive charge density. It is concluded that strong proton-initiated hydrogen bonding between amino groups provide cohesive head group interactions overcompensating possible repulsive charge interactions. While this behavior invalidates the application of the amino-glucoside as dispersing agent for the formulation of small vesicles, it potentially paves a route towards enhanced vesicle stability.
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Affiliation(s)
- Deepalakshmi Aravindan
- Chemistry Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Addison Alvin Alagan
- Chemistry Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Thorsten Heidelberg
- Chemistry Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Sit Foon Cheng
- Chemistry Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
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2
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Das S, Zheng C, Lodge TP, Siepmann JI, Mahanthappa MK, Calabrese MA, Reineke TM. Self-Assembly of Unusually Stable Thermotropic Network Phases by Cellobiose-Based Guerbet Glycolipids. Biomacromolecules 2024; 25:1291-1302. [PMID: 38170593 DOI: 10.1021/acs.biomac.3c01266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Bicontinuous thermotropic liquid crystal (LC) materials, e.g., double gyroid (DG) phases, have garnered significant attention due to the potential utility of their 3D network structures in wide-ranging applications. However, the utility of these materials is significantly constrained by the lack of robust molecular design rules for shape-filling amphiphiles that spontaneously adopt the saddle curvatures required to access these useful supramolecular assemblies. Toward this aim, we synthesized anomerically pure Guerbet-type glycolipids bearing cellobiose head groups and branched alkyl tails and studied their thermotropic LC self-assembly. Using a combination of differential scanning calorimetry, polarized optical microscopy, and small-angle X-ray scattering, our studies demonstrate that Guerbet cellobiosides exhibit a strong propensity to self-assemble into DG morphologies over wide thermotropic phase windows. The stabilities of these assemblies sensitively depend on the branched alkyl tail structure and the anomeric configuration of the glycolipid in a previously unrecognized manner. Complementary molecular simulations furnish detailed insights into the observed self-assembly characteristics, thus unveiling molecular motifs that foster network phase self-assembly that will enable future designs and applications of network LC materials.
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Affiliation(s)
- Soumi Das
- Department of Chemistry, University of Minnesota Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
| | - Caini Zheng
- Department of Chemistry, University of Minnesota Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
| | - Timothy P Lodge
- Department of Chemistry, University of Minnesota Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, 421 Washington Avenue SE #151, Minneapolis, Minnesota 55455, United States
| | - J Ilja Siepmann
- Department of Chemistry, University of Minnesota Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
| | - Mahesh K Mahanthappa
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, 421 Washington Avenue SE #151, Minneapolis, Minnesota 55455, United States
| | - Michelle A Calabrese
- Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, 421 Washington Avenue SE #151, Minneapolis, Minnesota 55455, United States
| | - Theresa M Reineke
- Department of Chemistry, University of Minnesota Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
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3
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Zahid NI, Salim M, Liew CY, Boyd BJ, Hashim R. Structural investigation and steric stabilisation of Guerbet glycolipid-based cubosomes and hexosomes using triblock polyethylene oxide-polypropylene oxide-polyethylene oxide copolymers. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Stability of cubic phase and curvature tuning in the lyotropic system of branched chain galactose-based glycolipid by amphiphilic additives. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126697] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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5
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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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6
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Ishak KA, Zahid NI, Velayutham TS, Annuar MSM, Hashim R. Effects of lipid packing and intermolecular hydrogen bond on thermotropic phase transition of stearyl glucoside. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Li X, Li Y, Wang Z. Structural properties of lecithin based reverse hexagonal (H II) liquid crystals and in vitro release of dihydromyricetin. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2017.1417134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xuepeng Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
| | - Yang Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
| | - Zhongni Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, PR China
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9
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Saari NAN, Mislan AA, Hashim R, Zahid NI. Self-Assembly, Thermotropic, and Lyotropic Phase Behavior of Guerbet Branched-Chain Maltosides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8962-8974. [PMID: 29999321 DOI: 10.1021/acs.langmuir.8b01899] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Five synthetic β-d-maltosides derived from Guerbet branched alcohols, whose total hydrocarbon chain length ranged from C8 to C24, were synthesized to a high anomeric purity, and their thermal properties, liquid-crystalline phases, and structures were characterized using differential scanning calorimetry, optical polarizing microscopy, and small-angle X-ray scattering. Thermal investigations of all anhydrous Guerbet maltosides showed that they do not form solid crystals but undergo a glass transition upon temperature change in the range of 35-53 °C. The glassy crystalline structure turns into the liquid-crystalline structure upon heating or addition of water. In thermotropic studies, the lamellar phase formation is prominent in shorter-chain-length analogues, whereas the longer-chain compounds exhibit a more frustrated form of self-assembly in the formation of a metastable state, polymorphism, and inverse bicontinuous cubic structure ( Ia3 d). The excess water conditions show that the phase formation is dominated by the lamellar phase for the longer-chain compounds. Normal micellar solution was observed in the shortest-chain-length maltosides because of the enlargement of hydrated maltose headgroups. The self-assembly of both dry and fully hydrated Guerbet maltosides, which exhibited glass-forming abilities and showed surface activity and also the ability to act as membrane-stabilizing compounds, makes them ideal candidates for practical use in industry as well as biomedical research.
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Affiliation(s)
- N A Nabila Saari
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Azwa Amanina Mislan
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Rauzah Hashim
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - N Idayu Zahid
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
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10
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Hashim R, Zahid NI, Velayutham TS, Aripin NFK, Ogawa S, Sugimura A. Dry Thermotropic Glycolipid Self-Assembly:A Review. J Oleo Sci 2018; 67:651-668. [PMID: 29760332 DOI: 10.5650/jos.ess17261] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Also recognized as carbohydrate liquid crystals, glycolipids are amphiphiles whose basic unit comprises of a sugar group attached to an alkyl chain. Glycolipids are amphitropic, which means these materials form liquid crystal self-assemblies when dry (thermotropic) as well as when dissolved in solvents (lyotropic/surfactants) such as water. Many glycolipids are also naturally derived since these can be found in cell membranes. Their membrane and surfactant functions are largely understood through their lyotropic properties. While glycolipids are expected to play major roles as eco-friendly surfactants in the global surfactant market, their usefulness as thermotropic liquid crystal material is, to date, unknown, due to relatively lack of research performed and data reported in the literature. Understandably since glycolipids are hygroscopic with many hydroxy groups, removing the last trace water is very challenging. In recent time, with careful lyophilization and more consistent characterization technique, some researchers have attempted serious studies into "dry" or anhydrous glycolipids. Motivated by possible developments of novel thermotropic applications, some results from these studies also provide surprising new understanding to support conventional wisdom of the lyotropic systems. Here we review the dry state of glycosides, a family of glycolipids whose sugar headgroup is linked to the lipid chain via a glycosidic oxygen linker. The structure property relationship of both linear and anhydrous Guerbet glycosides will be examined. In particular, how the variation of sugar stereochemistry (e.g. anomer vs. epimer), the chain length and chain branching affect the formation of thermotropic liquid crystals phases, which not only located under equilibrium but also far from equilibrium conditions (glassy phase) are scrutinized. The dry glycolipid assembly has been subjected to electric and magnetic fields and the results show interesting behaviors including a possible transient current generation.
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Affiliation(s)
- Rauzah Hashim
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya
| | - N Idayu Zahid
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya
| | - T S Velayutham
- Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya
| | | | | | - Akihiko Sugimura
- School of Information Systems Engineering, Osaka Sangyo University
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11
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Wei L, Li X, Guo F, Liu X, Wang Z. Structural properties, in vitro release and radical scavenging activity of lecithin based curcumin-encapsulated inverse hexagonal (HII) liquid crystals. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Idayu Zahid N, Anwar Ishak K, Timimi BA, Hashim R. Effect of Chain Branching on Orientational Ordering in Glycolipid Self-assembly by 2H-NMR using Extrinsic Probes. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.08.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Sazalee SA, Ahmad N, Hashim R. Investigation of self-assembly properties and the effect of tween series co-surfactants on the stability of nonionic branched-chain glycolipid hexosomes. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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Feast GC, Lepitre T, Tran N, Conn CE, Hutt OE, Mulet X, Drummond CJ, Savage GP. Inverse hexagonal and cubic micellar lyotropic liquid crystalline phase behaviour of novel double chain sugar-based amphiphiles. Colloids Surf B Biointerfaces 2017; 151:34-38. [DOI: 10.1016/j.colsurfb.2016.12.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/04/2016] [Accepted: 12/06/2016] [Indexed: 12/25/2022]
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15
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Das S, Xu W, Lehmler HJ, Miller AF, Knutson BL, Rankin SE. Inverted Micelle-in-Micelle Configuration in Cationic/Carbohydrate Surfactant Mixtures. Chemphyschem 2017; 18:79-86. [PMID: 27788284 DOI: 10.1002/cphc.201600908] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 11/12/2022]
Abstract
Nuclear magnetic resonance is applied to investigate the relative positions and interactions between cationic and non-ionic carbohydrate-based surfactants in mixed micelles with D2 O as the solvent. This is accomplished by using relaxation measurements [spin-lattice (T1 ) and spin-spin (T2 ) analysis] and nuclear Overhauser effect spectroscopy (NOESY). This study focuses on the interactions of n-octyl β-d-glucopyranoside (C8G1) and β-d-xylopyranoside (C8X1) with the cationic surfactant hexadecyltrimethylammonium bromide (C16 TAB). Whereas the interactions between carbohydrate and cationic surfactants are thermodynamically favorable, the NOESY results suggest that both of the sugar head groups are located preferentially at the interior core of the mixed micelles, so that they are not directly exposed to the bulk solution. The more hydrophilic sugar headgroups of C8G1 have more mobility than sugar heads of C8X1 owing to increased hydration. Herein, an inverted carbohydrate configuration in mixed micelles is proposed for the first time and supported by fluorescence spectroscopy experiments. This inverted carbohydrate headgroup configuration would limit the use of these mixed surfactants when access to the carbohydrate headgroup is important, but may present new opportunities where the carbohydrate-rich core of the micelles can be exploited.
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Affiliation(s)
- Saikat Das
- Chemical and Materials Engineering Department, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Wenjin Xu
- Department of Environmental and Occupational Health, University of Iowa, Iowa City, IA, 52242, USA
| | - Hans-Joachim Lehmler
- Department of Environmental and Occupational Health, University of Iowa, Iowa City, IA, 52242, USA
| | - Anne-Frances Miller
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506-0055, USA
| | - Barbara L Knutson
- Chemical and Materials Engineering Department, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Stephen E Rankin
- Chemical and Materials Engineering Department, University of Kentucky, Lexington, KY, 40506-0046, USA
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16
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Das M, Du Y, Mortensen JS, Ribeiro O, Hariharan P, Guan L, Loland CJ, Kobilka BK, Byrne B, Chae PS. Butane-1,2,3,4-tetraol-based amphiphilic stereoisomers for membrane protein study: importance of chirality in the linker region. Chem Sci 2016; 8:1169-1177. [PMID: 28451257 PMCID: PMC5369527 DOI: 10.1039/c6sc02981g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 09/27/2016] [Indexed: 12/14/2022] Open
Abstract
Chirality variation in amphiphile architecture resulted in a significant difference in detergent efficacy for membrane protein stabilisation.
Amphiphile selection is a crucial step in membrane protein structural and functional study. As conventional detergents have limited scope and utility, novel agents with enhanced efficacy need to be developed. Although a large number of novel agents have been reported, so far there has been no systematically designed comparative study of the protein stabilization efficacy of stereo-isomeric amphiphiles. Here we designed and prepared a novel class of stereo-isomeric amphiphiles, designated butane-1,2,3,4-tetraol-based maltosides (BTMs). These stereoisomers showed markedly different behaviour for most of the targeted membrane proteins depending on the chirality of the linker region. These findings indicate an important role for detergent stereochemistry in membrane protein stabilization. In addition, we generally observed enhanced detergent efficacy with increasing alkyl chain length, reinforcing the importance of the balance between hydrophobicity and hydrophilicity in detergent design. The stereo-isomeric difference in detergent efficacy observed provides an important design principle for the development of novel amphiphiles for membrane protein manipulation.
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Affiliation(s)
- Manabendra Das
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 , Korea .
| | - Yang Du
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Jonas S Mortensen
- Department of Neuroscience and Pharmacology , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Orquidea Ribeiro
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center , Lubbock , TX 79430 , USA .
| | - Claus J Loland
- Department of Neuroscience and Pharmacology , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Brian K Kobilka
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Bernadette Byrne
- Department of Life Sciences , Imperial College London , London , SW7 2AZ , UK .
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 , Korea .
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17
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Salim M, Wan Iskandar WFN, Patrick M, Zahid NI, Hashim R. Swelling of Bicontinuous Cubic Phases in Guerbet Glycolipid: Effects of Additives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5552-61. [PMID: 27183393 DOI: 10.1021/acs.langmuir.6b01007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Inverse bicontinuous cubic phases of lyotropic liquid crystal self-assembly have received much attention in biomedical, biosensing, and nanotechnology applications. An Ia3d bicontinuous cubic based on the gyroid G-surface can be formed by the Guerbet synthetic glucolipid 2-hexyl-decyl-β-d-glucopyranoside (β-Glc-OC6C10) in excess water. The small water channel diameter of this cubic phase could provide nanoscale constraints in encapsulation of large molecules and crystallization of membrane proteins, hence stresses the importance of water channel tuning ability. This work investigates the swelling behavior of lyotropic self-assembly of β-Glc-OC6C10 which could be controlled and modulated by different surfactants as a hydration-modulating agent. Our results demonstrate that addition of nonionic glycolipid octyl-β-d-glucopyranoside (β-Glc-OC8) at 20 and 25 mol % gives the largest attainable cubic water channel diameter of ca. 62 Å, and formation of coacervates which may be attributed to a sponge phase were seen at 20 mol % octyl-β-d-maltopyranoside (β-Mal-OC8). Swelling of the cubic water channel can also be attained in charged surfactant-doped systems dioctyl sodium sulfosuccinate (AOT) and hexadecyltrimethylammonium bromide (CTAB), of which phase transition occurred from cubic to a lamellar phase. Destabilization of the cubic phase to an inverse hexagonal phase was observed when a high amount of charged lecithin (LEC) and stearylamine (SA) was added to the lipid self-assembly.
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Affiliation(s)
- Malinda Salim
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Wan Farah Nasuha Wan Iskandar
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Melonney Patrick
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - N Idayu Zahid
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Rauzah Hashim
- Center of Fundamental Science of Self-Assembly, Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
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18
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Zahid NI, Abou-Zied OK, Nabila Saari NA, Hashim R. Comparative study of the inverse versus normal bicontinuous cubic phases of the β-d-glucopyranoside water-driven self-assemblies using fluorescent probes. RSC Adv 2016. [DOI: 10.1039/c5ra19794e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
This work investigates the head group region of the inverse and normal bicontinuous cubic phases (Ia3d space group) of the glucopyranoside/water system using 2-(2′-hydroxyphenyl)benzoxazole and its derivatives as fluorescent probes.
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Affiliation(s)
- N. Idayu Zahid
- Department of Chemistry
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Osama K. Abou-Zied
- Department of Chemistry
- Faculty of Science
- Sultan Qaboos University
- Muscat
- Sultanate of Oman
| | - N. A. Nabila Saari
- Department of Chemistry
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Rauzah Hashim
- Department of Chemistry
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
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19
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Tyagi M, Kartha KPR. Synthesis of glycotriazololipids and observations on their self-assembly properties. Carbohydr Res 2015; 413:85-92. [PMID: 26114887 DOI: 10.1016/j.carres.2015.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 03/30/2015] [Accepted: 04/08/2015] [Indexed: 11/28/2022]
Abstract
Various carbohydrate-anchored triazole-linked lipids prepared by solvent-free mechanochemical azide-alkyne click reaction, on analysis by TEM, have been found to spontaneously self-assemble in solvents leading to structures of interesting physicochemical attributes. Interestingly, analogous compounds based on different sugars (e.g., d-glucose, and d-galactose, as also d-lactose) assemble in patterns distinctly different from each other thus reiterating the fact that the structure of the sugar as well as that of the lipid are important factors that determine the size and shape of the supramolecular assembly formed. Besides, the molecular self-assembly was also found to be solvent-as well as temperature-dependent.
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Affiliation(s)
- Mohit Tyagi
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Punjab, India
| | - K P Ravindranathan Kartha
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Punjab, India.
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20
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Liew CY, Salim M, Zahid NI, Hashim R. Biomass derived xylose Guerbet surfactants: thermotropic and lyotropic properties from small-angle X-ray scattering. RSC Adv 2015. [DOI: 10.1039/c5ra17828b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel branched-chain glycosides were synthesised from xylose, an aldopentose and Guerbet alcohols whose total number of carbon atoms ranges from C8–C24. Interestingly dry β-Xyl-C8C4 gave a rectangular columnar ribbon phase at 25 °C.
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Affiliation(s)
- Chia Yen Liew
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Malinda Salim
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - N. Idayu Zahid
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Rauzah Hashim
- Center of Fundamental Science of Self-Assembly
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| |
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