1
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Abdelrahman N, Drescher S, Ann Dailey L, Klang V. Investigation of keratolytic impact of synthetic bolalipids on skin penetration of a model hydrophilic permeant. Eur J Pharm Biopharm 2024:114433. [PMID: 39098617 DOI: 10.1016/j.ejpb.2024.114433] [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: 01/04/2024] [Revised: 04/26/2024] [Accepted: 08/01/2024] [Indexed: 08/06/2024]
Abstract
Synthetic single-chain bolalipids (SSCBs) are novel excipients in drug delivery, with potential as stabilizers or solubilizers. However, their impact on skin barrier function has not been comprehensively studied. Therefore, two SSCBs (PC-C24-PC and PC-C32-PC) were studied in aqueous systems for their impact on penetration of a model permeant into porcine skin. Concentrations of 0.05 - 5 % w/w were tested; PC-C24-PC formulations were low-viscosity liquids while PC-C32-PC formed viscous dispersions to gels at room temperature. Formulations were compared for their ability to enhance sodium fluorescein penetration (SF, 0.1 % w/w) into skin via tape stripping. Using NIR-densitometry, the effect of SSCB formulations on corneocyte cohesion was evaluated. Data were compared with phospholipid mixture Lipoid S-75, sodium dodecyl sulfate (SDS), and polyethylene glycol 12-hydroxystearate (PEG-HS), and distilled water as negative control. Contrary to the hypothesis, both SSCBs failed to increase SF penetration into the stratum corneum, but rather showed a significant decrease in penetration depth compared to water. Both SSCBs exhibited a keratolytic effect at 5 % w/w, leading to substantial removal of proteins from the skin surface. Consequently, SSCBs may not enhance penetration of hydrophilic drugs into skin, but could be used as keratolytic agents.
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Affiliation(s)
- Namarig Abdelrahman
- University of Vienna, Doctoral School of Pharmaceutical, Nutritional and Sport Sciences, 1090, Vienna, Austria
| | - Simon Drescher
- Phospholipid Research Center Phospholipid Research Center, Im Neuenheimer Feld 515, 69120, Heidelberg, Germany
| | - Lea Ann Dailey
- University of Vienna, Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology, Josef-Holaubek-Platz 2, 1090, Vienna, Austria.
| | - Victoria Klang
- University of Vienna, Department of Pharmaceutical Sciences, Division of Pharmaceutical Technology, Josef-Holaubek-Platz 2, 1090, Vienna, Austria.
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2
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Kocas M, Comoglu T, Ozkul A. Development and in vitro antiviral activity of ivermectin liposomes as a potential drug carrier system. Arch Pharm (Weinheim) 2024; 357:e2300708. [PMID: 38702288 DOI: 10.1002/ardp.202300708] [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: 12/04/2023] [Revised: 03/12/2024] [Accepted: 04/10/2024] [Indexed: 05/06/2024]
Abstract
This study aimed to assess and compare diverse formulations of ivermectin-loaded liposomes, employing lipid film hydration and ethanol injection methods. Three lipids (DOPC, SPC, and DSPC) were used in predetermined molar ratios. A total of 18 formulations were created, and a factorial design determined the optimal formulation based on particle size, polydispersity index (PDI), zeta potential, and encapsulation efficiency. The average mean particle size, PDI and zeta potential of the selected formulations (F1, F2, F7, F9, and F11) was, respectively, 196.40 ± 44.60 nm, 0.39 ± 0.09, and -40.24 ± 9.17. The encapsulation efficiency exceeded 80%, with a mean loading capacity of 4.00 ± 1.70%. In vitro studies included transmission electron microscopy, Fourier transform infrared spectroscopy, drug release, and antiviral activity assessments against SARS-CoV-2. The liposomal formulations demonstrated superior antiviral activity compared to free ivermectin, as indicated by lower IC50 values. The results of this study emphasize the effectiveness of ivermectin-loaded liposomes in inhibiting viral activity, highlighting their potential as promising candidates for antiviral therapy. The findings suggest that the strategic use of liposomes as drug carriers can significantly modulate and improve the antiviral properties of ivermectin, offering a novel approach to harnessing its full therapeutic potential. Collectively, these results provide a robust foundation for further exploration of ivermectin as a viral protection tool and optimization of its delivery mechanisms.
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Affiliation(s)
- Meryem Kocas
- Department of Pharmaceutical Technology, Selcuk University Faculty of Pharmacy, Konya, Turkey
- Graduate School of Health Sciences, Ankara University, Ankara, Turkey
- Department of Pharmaceutical Technology, Ankara University Faculty of Pharmacy, Ankara, Turkey
| | - Tansel Comoglu
- Department of Pharmaceutical Technology, Ankara University Faculty of Pharmacy, Ankara, Turkey
| | - Aykut Ozkul
- Department of Virology, Ankara University Faculty of Veterinary Medicine, Ankara, Turkey
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3
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Sedlmayr V, Horn C, Wurm DJ, Spadiut O, Quehenberger J. Archaeosomes facilitate storage and oral delivery of cannabidiol. Int J Pharm 2023; 645:123434. [PMID: 37739097 DOI: 10.1016/j.ijpharm.2023.123434] [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: 05/23/2023] [Revised: 08/15/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
Cannabidiol (CBD) has received great scientific interest due to its numerous therapeutic applications. Degradation in the gastrointestinal (GI) tract, first-pass metabolism, and low water solubility restrain bioavailability of CBD to only 6% in current oral administration. Lipid-based nanocarriers are delivery systems that may enhance accessibility and solubility of hydrophobic payloads, such as CBD. Conventional lecithin-derived liposomes, however, have limitations regarding stability in the GI tract and long-term storage. Ether lipid-based archaeosomes may have the potential to overcome these problems due to chemical and structural uniqueness. In this study, we compared lecithin-derived liposomes with archaeosomes in their applicability as an oral delivery system of CBD. We evaluated drug load, storage stability, stability in a simulated GI tract, and in vitro particle uptake in Caco-2 cells. Loading capacity was 6-fold higher in archaeosomes than conventional liposomes while providing a stable formulation over six months after lyophilization. In a simulated GI tract, CBD recovery in archaeosomes was 57 ± 3% compared to only 34 ± 1% in conventional liposomes and particle uptake in Caco-2 cells was enhanced up to 6-fold. Our results demonstrate that archaeosomes present an interesting solution to tackle current issues of oral CBD formulations due to improved stability and endocytosis.
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Affiliation(s)
- Viktor Sedlmayr
- TU Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria
| | | | | | - Oliver Spadiut
- TU Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria
| | - Julian Quehenberger
- TU Wien, Institute of Chemical, Environmental and Bioscience Engineering, Vienna, Austria; NovoArc GmbH, Vienna, Austria.
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4
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Hemetsberger A, Preis E, Engelhardt K, Gutberlet B, Runkel F, Bakowsky U. Highly Stable Liposomes Based on Tetraether Lipids as a Promising and Versatile Drug Delivery System. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6995. [PMID: 36234336 PMCID: PMC9571198 DOI: 10.3390/ma15196995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Conventional liposomes often lack stability, limiting their applicability and usage apart from intravenous routes. Nevertheless, their advantages in drug encapsulation and physicochemical properties might be helpful in oral and pulmonary drug delivery. This study investigated the feasibility and stability of liposomes containing tetraether lipids (TEL) from Thermoplasma acidophilum. Liposomes composed of different molar ratios of TEL:Phospholipon 100H (Ph) were produced and exposed to various temperature and pH conditions. The effects on size, polydispersity index, and zeta potential were examined by dynamic and electrophoretic light scattering. Autoclaving, which was considered an additional process step after fabrication, could minimize contamination and prolong shelf life, and the stability after autoclaving was tested. Moreover, 5(6)-carboxyfluorescein leakage was measured after incubation in the presence of fetal calf serum (FCS) and lung surfactant (Alveofact). The incorporation of TEL into the liposomes significantly impacted the stability against low pH, higher temperatures, and even sterilization by autoclaving. The stability of liposomes containing TEL was confirmed by atomic force microscopy as images revealed similar sizes and morphology before and after incubation with FCS. It could be concluded that increasing the molar ratio in the TEL:Ph liposome formulations improved the structural stability against high temperature, low pH, sterilization via autoclaving, and the presence of FCS and lung surfactant.
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Affiliation(s)
- Aybike Hemetsberger
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Eduard Preis
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Konrad Engelhardt
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Bernd Gutberlet
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Frank Runkel
- Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Wiesenstrasse 14, 35390 Giessen, Germany
- Faculty of Biology and Chemistry, Justus-Liebig University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
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5
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Recent Advances in Oral Peptide or Protein-Based Drug Liposomes. Pharmaceuticals (Basel) 2022; 15:ph15091072. [PMID: 36145293 PMCID: PMC9501131 DOI: 10.3390/ph15091072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
The high physiology and low toxicity of therapeutic peptides and proteins have made them a hot spot for drug development in recent years. However, their poor oral bioavailability and unstable metabolism make their clinical application difficult. The bilayer membrane of liposomes provides protection for the drug within the compartment, and their high biocompatibility makes the drug more easily absorbed by the body. However, phospholipids—which form the membranes—are subjected to various digestive enzymes and mucosal adhesion in the digestive tract and disintegrate before absorption. Improvements in the composition of liposomes or modifying their surface can enhance the stability of the liposomes in the gastrointestinal tract. This article reviews the basic strategies for liposome preparation and surface modification that promote the oral administration of therapeutic polypeptides.
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6
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Pillai VV, Kumari P, Benedetto A, Gobbo D, Ballone P. Absorption of Phosphonium Cations and Dications into a Hydrated POPC Phospholipid Bilayer: A Computational Study. J Phys Chem B 2022; 126:4272-4288. [PMID: 35666883 PMCID: PMC9207913 DOI: 10.1021/acs.jpcb.2c02212] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/17/2022] [Indexed: 11/30/2022]
Abstract
Molecular dynamics (MD) based on an empirical force field is applied to investigate the effect of phosphonium cations ([P6,6,6,6]+) and geminal dications ([DxC10]2+) inserted at T = 300 K into the hydration layer separating planar POPC phospholipid bilayers. Up to high concentration, nearly every added cation and dication becomes absorbed into the lipid phase. Absorption takes place during several microseconds and is virtually irreversible. The neutralizing counterions ([Cl]-, in the present simulation) remain dissolved in water, giving origin to the charge separation and the strong electrostatic double layer at the water/lipid interface. Incorporation of cations and dications changes the properties of the lipid bilayer such as diffusion, viscosity, and the electrostatic pattern. At high ionic concentration, the bilayer acquires a long-wavelength standing undulation, corresponding to a change of phase from fluid planar to ripple. All these changes are potentially able to affect processes relevant in the context of cell biology. The major difference between cations and dications concerns the kinetics of absorption, which takes place nearly two times faster in the [P6,6,6,6]+ case, and for [DxC10]2+ dications displays a marked separation into two-stages, corresponding to the easy absorption of the first phosphonium head of the dication and the somewhat more activated absorption of the second phosphonium head of each dication.
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Affiliation(s)
- V. V.
S. Pillai
- School
of Physics, University College Dublin, Dublin 4, Ireland
- Conway
Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin
4, Ireland
| | - P. Kumari
- School
of Physics, University College Dublin, Dublin 4, Ireland
- Conway
Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin
4, Ireland
| | - A. Benedetto
- School
of Physics, University College Dublin, Dublin 4, Ireland
- Conway
Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin
4, Ireland
- Department
of Sciences, University of Roma Tre, I-00154 Rome, Italy
| | - D. Gobbo
- School
of Pharmaceutical Sciences and ISPSO, University
of Geneva, Rue Michel-Servet
1, CH-1211, Geneva
4, Switzerland
- Computational
and Chemical Biology, Fondazione Istituto
Italiano di Tecnologia, I-16163 Genova, Italy
| | - P. Ballone
- School
of Physics, University College Dublin, Dublin 4, Ireland
- Conway
Institute for Biomolecular and Biomedical Research, University College Dublin, Dublin
4, Ireland
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7
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Li F, Harvey RD, Modicano P, Hamdi F, Kyrilis F, Müller S, Gruhle K, Kastritis P, Drescher S, Dailey LA. Investigating bolalipids as solubilizing agents for poorly soluble drugs: Effects of alkyl chain length on solubilization and cytotoxicity. Colloids Surf B Biointerfaces 2022; 212:112369. [PMID: 35123195 DOI: 10.1016/j.colsurfb.2022.112369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 01/31/2023]
Abstract
Synthetic single-chain bolalipids with symmetrical headgroups have shown potential in various pharmaceutical applications, such as the stabilization of liposome bilayers. Despite their amphiphilic character, synthetic bolalipids have not yet been investigated for their suitability as solubilizing agents for poorly soluble drug compounds. In this study, three synthetic single-chain bolalipids with increasing alkyl chain lengths (C22, C24 and C26) were investigated. All three bolalipids were able to achieve an increased solubility of the model drug, mefenamic acid, by approximately 180% in a pH 7.4 buffer compared to only a 102-105% increase achieved by sodium dodecyl sulfate (SDS) or the non-ionic surfactant pegylated hydroxystearate (PEG-HS). Subsequently, interfacial activity of bolalipids and their ability to destabilize liposomal bilayers were investigated. The C22 bolalipid exhibited a consistently lower interfacial activity, which was consistent with its significantly lower cytotoxicity in the macrophage-like cell line, J774. A1, compared to C24 and C26 counterparts. The mean IC50 values of the bolalipids tested (0.035-0.093 mM) were approximately 4-100-fold lower than that of SDS (0.401 mM) or PEG-HS (0.922 mM), with the mechanism of toxicity linked to increased cell membrane permeability, as is expected for surfactants. In summary, evidence from this study shows that decreasing the length of the bolalipid alkyl linker from C26 to C22 resulted in a significantly decreased cytotoxicity with no loss in drug solubilization efficiency.
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Affiliation(s)
- Feng Li
- Department of Pharmaceutical Sciences, University of Vienna, Althanstraße 14, A-1090 Vienna, Austria
| | - Richard D Harvey
- Department of Pharmaceutical Sciences, University of Vienna, Althanstraße 14, A-1090 Vienna, Austria
| | - Paola Modicano
- Institute of Pharmacy, Department of Pharmaceutical Technology and Biopharmaceutics, Martin Luther University (MLU) Halle-Wittenberg, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany
| | - Farzad Hamdi
- Biozentrum, MLU Halle-Wittenberg, Weinbergweg 22, Halle/Saale, Germany; Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Fotios Kyrilis
- Biozentrum, MLU Halle-Wittenberg, Weinbergweg 22, Halle/Saale, Germany; Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Sindy Müller
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Kai Gruhle
- Institute of Pharmacy, Department of Pharmaceutical Chemistry, MLU Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle (Saale), Germany
| | - Panagiotis Kastritis
- Biozentrum, MLU Halle-Wittenberg, Weinbergweg 22, Halle/Saale, Germany; Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, MLU Halle-Wittenberg, Kurt-Mothes-Str. 3a, 06120 Halle (Saale), Germany
| | - Simon Drescher
- Phospholipid Research Center, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Lea Ann Dailey
- Department of Pharmaceutical Sciences, University of Vienna, Althanstraße 14, A-1090 Vienna, Austria.
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8
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O'Neil PT. A Limitation of Using Dithionite Quenching to Determine the Topology of Membrane-inserted Proteins. J Membr Biol 2021; 255:123-127. [PMID: 34694464 DOI: 10.1007/s00232-021-00199-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 08/21/2021] [Indexed: 10/20/2022]
Abstract
Determining the topology of membrane-inserted proteins and peptides often relies upon indirect fluorescent measurements. One such technique uses NBD, an environmentally sensitive fluorophore that can be covalently linked to proteins. Relative to a hydrophilic environment, NBD in a hydrophobic environment shows an increase in emission intensity and a shift to shorter wavelengths. To gain further insight, NBD fluorescence can be chemically quenched using dithionite. As dithionite is an anion, it is only expected to penetrate the outer leaflet interfacial region and should be excluded from the hydrocarbon core, the inner leaflet, and the lumen of LUV. This assumption holds at neutral pH, where a large number of NBD/dithionite experiments are carried out. Here, we report control experiments in which LUV were directly labeled with NBD-PE to assess dithionite quenching in acidic conditions. Results showed that at acidic pH, dithionite moved more freely across the bilayer to quench the inner leaflet. For the buffer conditions used, dithionite exhibited a sharp change in behavior between pH 5.5 and 6.0. Therefore, in acidic conditions, dithionite could not differentiate in which leaflet the NBD resided.
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Affiliation(s)
- Pierce T O'Neil
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS, 66160, USA.
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9
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Kriegler S, Paulisch TO, Wegner T, Glorius F, Winter R. Bipolar Imidazolium-Based Lipid Analogues for Artificial Archaeosomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11996-12006. [PMID: 34619962 DOI: 10.1021/acs.langmuir.1c01565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Archaeal lipids have harvested biomedical and biotechnological interest because of their ability to form membranes with low permeability and enhanced temperature and pressure stability. Because of problems in isolating archaeal lipids, chemical synthesis appears to be a suitable means of producing model lipids that mimic the biological counterparts. Here, we introduce a new concept: we synthesized bipolar alkylated imidazolium salts of different chain lengths (BIm10-32) and studied their structure and lyotropic phase behavior. Furthermore, mixtures of the bolalipid analogues with phospholipid model biomembranes of diverse complexity were studied. DSC, fluorescence and FTIR spectroscopy, confocal fluorescence microscopy, DLS, SAXS, and TEM were used to reveal changes in lipid phase behavior, fluidity, the lipid's conformational order, and membrane morphology over a wide range of temperatures and for selected pressures. It could be shown that the long-chain BImN32 can form monolayer sheets. Integrated in phospholipid membranes, it reveals a fluidizing effect. Here, the two polar head groups, connected by a long alkyl chain, enable the integration into the bilayer. Interestingly, addition of BImN32 to fluid DPPC liposomes increased the lipid packing markedly, rendering the membrane system more stable at higher temperatures. The membrane system is also stable against compression as indicated by the high-pressure stability of the system, mimicking an archaeal lipid-like behavior. BImN32 incorporation into raft-like anionic model biomembranes led to marked changes in lateral membrane organization, topology, and fusogenicity of the membrane. Overall, it was found that long-chain imidazolium-based bolalipid analogues can help adjust membrane's biophysical properties, while the imidazolium headgroup provides the ability for crucial electrostatic interaction for vesicle fusion or selective interaction with membrane-related signaling molecules and polypeptides in a synthetically tractable manner. The results obtained may help to develop new approaches for rational design of extremophilic bolalipid-based liposomes for various applications, including delivery of drugs and vaccines.
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Affiliation(s)
- Simon Kriegler
- Department of Chemistry and Chemical Biology, Physical Chemistry I - Biophysical Chemistry, TU Dortmund University, Otto Hahn Str. 4a, D-44221 Dortmund, Germany
| | - Tiffany O Paulisch
- Institute of Organic Chemistry, University of Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Tristan Wegner
- Institute of Organic Chemistry, University of Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Frank Glorius
- Institute of Organic Chemistry, University of Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Roland Winter
- Department of Chemistry and Chemical Biology, Physical Chemistry I - Biophysical Chemistry, TU Dortmund University, Otto Hahn Str. 4a, D-44221 Dortmund, Germany
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10
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Mühlberg E, Burtscher M, Umstätter F, Fricker G, Mier W, Uhl P. Trends in liposomal nanocarrier strategies for the oral delivery of biologics. Nanomedicine (Lond) 2021; 16:1813-1832. [PMID: 34269068 DOI: 10.2217/nnm-2021-0177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The number of approved macromolecular drugs such as peptides, proteins and antibodies steadily increases. Since drugs with high molecular weight are commonly not suitable for oral delivery, research on carrier strategies enabling oral administration is of vital interest. In past decades, nanocarriers, in particular liposomes, have been exhaustively investigated as oral drug-delivery platform. Despite their successful application as parenteral delivery vehicles, liposomes have up to date not succeeded for oral administration. However, a plenitude of approaches aiming to increase the oral bioavailability of macromolecular drugs administered by liposomal formulations has been published. Here, we summarize the strategies published in the last 10 years (vaccine strategies excluded) with a main focus on strategies proven efficient in animal models.
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Affiliation(s)
- Eric Mühlberg
- Department of Nuclear Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, 69120, Germany
| | - Mira Burtscher
- Department of Nuclear Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, 69120, Germany
| | - Florian Umstätter
- Department of Nuclear Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, 69120, Germany
| | - Gert Fricker
- Department of Pharmaceutical Technology & Biopharmacy, Institute for Pharmacy & Molecular Biotechnology, Ruprecht-Karls University, Im Neuenheimer Feld 329, Heidelberg, 69120, Germany
| | - Walter Mier
- Department of Nuclear Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, 69120, Germany
| | - Philipp Uhl
- Department of Nuclear Medicine, Heidelberg University Hospital, Im Neuenheimer Feld 400, Heidelberg, 69120, Germany
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11
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Jash A, Ubeyitogullari A, Rizvi SSH. Liposomes for oral delivery of protein and peptide-based therapeutics: challenges, formulation strategies, and advances. J Mater Chem B 2021; 9:4773-4792. [PMID: 34027542 DOI: 10.1039/d1tb00126d] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Throughout the past decade, there has been a rapid growth in the development of protein/peptide-based therapeutics. These therapeutics have found widespread applications in the treatment of cancer, infectious diseases, and other metabolic disorders owing to their several desirable attributes, such as reduced toxicity, diverse biological activities, high specificity, and potency. Most protein/peptide-based drugs are still administered parenterally, and there is an unprecedented demand in the pharmaceutical industry to develop oral delivery routes to increase patient acceptability and convenience. Recent advancements in nanomedicine discoveries have led to the development of several nano and micro-particle-based oral delivery platforms for protein/peptide-based therapeutics and among these, liposomes have emerged as a prominent candidate. Liposomes are spherical vesicles composed of one or more phospholipid bilayers enclosing a core aqueous phase. Their unique amphiphilic nature enables encapsulation of a diverse range of bioactives/drugs including both hydrophobic and hydrophilic compounds for delivery. Against this backdrop, this review provides an overview of the current approaches and challenges associated with the routes and methods of oral administration of protein/peptide-based therapeutics by using liposomes as a potential vehicle. First, the conventional and innovative liposome formation approaches have been discussed along with their applications. Next, the challenges associated with current approaches for oral delivery of protein and peptide-derived therapeutics have been thoroughly addressed. Lastly, we have critically reviewed the potential of liposomes utilization as vehicles for oral delivery of proteins emphasizing the current status and future directions in this area.
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Affiliation(s)
- Apratim Jash
- Department of Food Science, Cornell University, Ithaca, NY 14850, USA
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12
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Gruhle K, Tuchtenhagen M, Müller S, Hause G, Meister A, Drescher S. Synthesis and aggregation behaviour of single-chain, 1,32-alkyl-branched bis(phosphocholines) - part 2: lateral chain length triggers self-assembling from sheets to fibres to vesicles. Org Biomol Chem 2021; 18:3585-3598. [PMID: 32347287 DOI: 10.1039/d0ob00534g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Six single-chain, 1,32-alkyl-branched bis(phosphocholines) PC-C32(1,32Cm)-PC have been synthesized as model lipids for naturally occurring archaeal membrane lipids. The preparation of these bipolar amphiphiles bearing lateral alkyl chains of different lengths (C4-C15) was realized using a Cu-catalyzed Grignard bis-coupling reaction of various primary alkyl-branched bromides as side parts and a 1,22-dibromide as the centre part. The aggregation behaviour of these bolalipids in water was initially investigated by differential scanning calorimetry and transmission electron microscopy. As a main result, the types of aggregates found and their stability upon heating were strongly connected to the length of the lateral alkyl chain of the bolalipid: short and long lateral chains led to lamellar structures, whereas side chains of medium length led to fibrous aggregates. In future, these bolalipids could be used to produce tailored and stabilized liposomes for oral drug delivery.
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Affiliation(s)
- Kai Gruhle
- Institute of Pharmacy - Biophysical Pharmacy, Martin Luther University (MLU), Wolfgang-Langenbeck-Strasse 4, 01620 Halle (Saale), Germany.
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13
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Drescher S, van Hoogevest P. The Phospholipid Research Center: Current Research in Phospholipids and Their Use in Drug Delivery. Pharmaceutics 2020; 12:pharmaceutics12121235. [PMID: 33353254 PMCID: PMC7766331 DOI: 10.3390/pharmaceutics12121235] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 12/16/2022] Open
Abstract
This review summarizes the research on phospholipids and their use for drug delivery related to the Phospholipid Research Center Heidelberg (PRC). The focus is on projects that have been approved by the PRC since 2017 and are currently still ongoing or have recently been completed. The different projects cover all facets of phospholipid research, from basic to applied research, including the use of phospholipids in different administration forms such as liposomes, mixed micelles, emulsions, and extrudates, up to industrial application-oriented research. These projects also include all routes of administration, namely parenteral, oral, and topical. With this review we would like to highlight possible future research directions, including a short introduction into the world of phospholipids.
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