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Johnsson M, Pedroncelli AM, Hansson A, Tiberg F. Pharmacokinetics and pharmacodynamics of a pasireotide subcutaneous depot (CAM4071) and comparison with immediate and long-acting release pasireotide. Endocrine 2024; 84:1125-1134. [PMID: 38421556 DOI: 10.1007/s12020-024-03741-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/11/2024] [Indexed: 03/02/2024]
Abstract
PURPOSE To assess the pharmacokinetics, pharmacodynamics, safety and tolerability of subcutaneous depot CAM4071, a novel, ready-to-use pasireotide formulation. METHODS This was a phase 1, randomised, open-label study in healthy volunteers. After a single 600 µg dose of pasireotide immediate release (IR), participants were randomised to one of eight groups to receive either a CAM4071 upper thigh (5, 10, 20, 40 or 80 mg) or buttock (20 mg) injection or multiple pasireotide IR 900 µg upper thigh injections twice daily or a single pasireotide long-acting release (LAR) 60 mg intramuscular buttock injection. RESULTS Ninety-four participants were randomised. For all CAM4071 doses, initial pasireotide release was relatively rapid compared to pasireotide LAR and sustained over the 2-month observation period, with a slow decay in plasma concentrations. CAM4071 maximum plasma concentrations increased slightly greater than dose proportionally; area under the curve extrapolated to infinity increased approximately dose proportionally. Relative bioavailability of pasireotide for different doses of CAM4071 versus pasireotide IR 600 μg ranged from 0.752 (90% confidence interval [CI]: 0.58, 0.98) to 1.68 (1.32, 2.14), and versus pasireotide LAR: 0.517 (0.37, 0.72) to 1.15 (0.84, 1.58). CAM4071 doses >5 mg exhibited rapid initial reductions of insulin-like growth factor 1 (IGF-1) compared to pasireotide LAR. Maximum IGF-1 inhibition was greatest for CAM4071 80 mg. CAM4071 injections ≤40 mg were well tolerated and comparable with currently available pasireotide formulations. CONCLUSION CAM4071 provided long-acting release of pasireotide over at least one month, with high bioavailability and onset and duration of IGF-1 suppression similar to pasireotide LAR. TRIAL REGISTRATION EudraCT: 2014-003783-20.
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Gadelha MR, Gadelha AC, Kasuki L. New Treatments for Acromegaly in Development. J Clin Endocrinol Metab 2024; 109:e1323-e1327. [PMID: 37757837 PMCID: PMC10940255 DOI: 10.1210/clinem/dgad568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023]
Abstract
Acromegaly treatment has greatly evolved in recent decades, but there are still patients whose acromegaly is not controlled with currently available treatments, and there is a need to improve the treatment burden. Fortunately, there are new treatments under development that may increase treatment efficacy and convenience.
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Affiliation(s)
- Mônica R Gadelha
- Endocrine Unit and Neuroendocrinology Research Center, Medical School and Hospital Universitário Clementino Fraga Filho—Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-913, Brazil
- Neuroendocrine Unit—Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria Estadual de Saúde, Rio de Janeiro 20231-092, Brazil
- Neuropathology and Molecular Genetics Laboratory, Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria Estadual de Saúde, Rio de Janeiro 20231-092, Brazil
| | - Ana Carolina Gadelha
- Endocrine Unit and Neuroendocrinology Research Center, Medical School and Hospital Universitário Clementino Fraga Filho—Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-913, Brazil
| | - Leandro Kasuki
- Endocrine Unit and Neuroendocrinology Research Center, Medical School and Hospital Universitário Clementino Fraga Filho—Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-913, Brazil
- Neuroendocrine Unit—Instituto Estadual do Cérebro Paulo Niemeyer, Secretaria Estadual de Saúde, Rio de Janeiro 20231-092, Brazil
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Mohammadian Farsani A, Mokhtari N, Nooraei S, Bahrulolum H, Akbari A, Farsani ZM, Khatami S, Ebadi MS, Ahmadian G. Lipid nanoparticles: The game-changer in CRISPR-Cas9 genome editing. Heliyon 2024; 10:e24606. [PMID: 38288017 PMCID: PMC10823087 DOI: 10.1016/j.heliyon.2024.e24606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 01/31/2024] Open
Abstract
The steady progress in genome editing, especially genome editing based on the use of clustered regularly interspaced short palindromic repeats (CRISPR) and programmable nucleases to make precise modifications to genetic material, has provided enormous opportunities to advance biomedical research and promote human health. However, limited transfection efficiency of CRISPR-Cas9 poses a substantial challenge, hindering its wide adoption for genetic modification. Recent advancements in nanoparticle technology, specifically lipid nanoparticles (LNPs), offer promising opportunities for targeted drug delivery. LNPs are becoming popular as a means of delivering therapeutics, including those based on nucleic acids and mRNA. Notably, certain LNPs, such as Polyethylene glycol-phospholipid-modified cationic lipid nanoparticles and solid lipid nanoparticles, exhibit remarkable potential for efficient CRISPR-Cas9 delivery as a gene editing instrument. This review will introduce the molecular mechanisms and diverse applications of the CRISPR/Cas9 gene editing system, current strategies for delivering CRISPR/Cas9-based tools, the advantage of LNPs for CRISPR-Cas9 delivery, an overview of strategies for overcoming off-target genome editing, and approaches for improving genome targeting and tissue targeting. We will also highlight current developments and recent clinical trials for the delivery of CRISPR/Cas9. Finally, future directions for overcoming the limitations and adaptation of this technology for clinical trials will be discussed.
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Affiliation(s)
- Arezoo Mohammadian Farsani
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Negin Mokhtari
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi Univesity, Tehran, Iran
| | - Saghi Nooraei
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Howra Bahrulolum
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Ali Akbari
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Zoheir Mohammadian Farsani
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Seyedmoein Khatami
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Mozhdeh sadat Ebadi
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Gholamreza Ahmadian
- Department of Industrial and Environmental Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
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4
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Bagatolli LA, Stock RP. Lipids, membranes, colloids and cells: A long view. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2021; 1863:183684. [PMID: 34166642 DOI: 10.1016/j.bbamem.2021.183684] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/01/2021] [Accepted: 06/16/2021] [Indexed: 12/13/2022]
Abstract
This paper revisits long-standing ideas about biological membranes in the context of an equally long-standing, but hitherto largely unappreciated, perspective of the cell based on concepts derived from the physics and chemistry of colloids. Specifically, we discuss important biophysical aspects of lipid supramolecular structure to understand how the intracellular milieu may constrain lipid self-assembly. To this end we will develop four lines of thought: first, we will look at the historical development of the current view of cellular structure and physiology, considering also the plurality of approaches that influenced its formative period. Second, we will review recent basic research on the structural and dynamical properties of lipid aggregates as well as the role of phase transitions in biophysical chemistry and cell biology. Third, we will present a general overview of contemporary studies into cellular compartmentalization in the context of a very rich and mostly forgotten general theory of cell physiology called the Association-Induction Hypothesis, which was developed around the time that the current view of cells congealed into its present form. Fourth, we will examine some recent developments in cellular studies, mostly from our laboratory, that raise interesting issues about the dynamical aspects of cell structure and compartmentalization. We will conclude by suggesting what we consider are relevant questions about the nature of cellular processes as emergent phenomena.
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Affiliation(s)
- Luis A Bagatolli
- Instituto de Investigación Médica Mercedes y Martín Ferreyra - INIMEC (CONICET)-Universidad Nacional de Córdoba, Friuli 2434, 5016 Córdoba, Argentina; Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina; MEMPHYS - International and Interdisciplinary research network, Denmark.
| | - Roberto P Stock
- MEMPHYS - International and Interdisciplinary research network, Denmark
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5
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Mertz N, Yaghmur A, Østergaard J, Amenitsch H, Larsen SW. Spatially and time-resolved SAXS for monitoring dynamic structural transitions during in situ generation of non-lamellar liquid crystalline phases in biologically relevant media. J Colloid Interface Sci 2021; 602:415-425. [PMID: 34144300 DOI: 10.1016/j.jcis.2021.06.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/28/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
Formation of high viscous inverse lyotropic liquid crystalline phases in situ upon exposure of low viscous drug-loaded lipid preformulations to synovial fluid provides a promising approach for design of depot formulations for intra-articular drug delivery. Rational formulation design relies on a fundamental understanding of the synovial fluid-mediated dynamic structural transitions occurring at the administration site. At conditions mimicking the in vivo situation, we investigated in real-time such transitions at multiple positions by synchrotron small-angle X-ray scattering (SAXS) combined with an injection-cell. An injectable diclofenac-loaded quaternary preformulation consisting of 72/8/10/10% (w/w) glycerol monooleate/1,2-dioleoyl-glycero-3-phospho-rac-(1-glycerol)/ethanol/water was injected into hyaluronic acid solution or synovial fluid. A fast generation of a coherent drug depot of inverse bicontinuous Im3m and Pn3m cubic phases was observed. Through construction of 2D spatial maps from measurements performed 60 min after injection of the preformulation, it was possible to differentiate liquid crystalline rich- and excess hyaluronic acid solution- or synovial fluid-rich regimes. Synchrotron SAXS findings confirmed that the exposure of the preformulation to the media leads to alterations in structural features in position- and time-dependent manners. Effects of biologically relevant medium composition on the structural features, and implications for development of formulations with sustained drug release properties are highlighted.
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Affiliation(s)
- Nina Mertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Jesper Østergaard
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria.
| | - Susan Weng Larsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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Murgia S, Biffi S, Fornasier M, Lippolis V, Picci G, Caltagirone C. Bioimaging Applications of Non-Lamellar Liquid Crystalline Nanoparticles. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:2742-2759. [PMID: 33653441 DOI: 10.1166/jnn.2021.19064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Self-assembling processes of amphiphilic lipids in water give rise to complex architectures known as lyotropic liquid crystalline (LLC) phases. Particularly, bicontinuous cubic and hexagonal LLC phases can be dispersed in water forming colloidal nanoparticles respectively known as cubosomes and hexosomes. These non-lamellar LLC dispersions are of particular interest for pharmaceutical and biomedical applications as they are potentially non-toxic, chemically stable, and biocompatible, also allowing encapsulation of large amounts of drugs. Furthermore, conjugation of specific moieties enables their targeting, increasing therapeutic efficacies and reducing side effects by avoiding exposure of healthy tissues. In addition, as they can be easy loaded or functionalized with both hydrophobic and hydrophilic imaging probes, cubosomes and hexosomes can be used for the engineering of multifunctional/theranostic nanoplatforms. This review outlines recent advances in the applications of cubosomes and hexosomes for in vitro and in vivo bioimaging.
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Affiliation(s)
- Sergio Murgia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, s.s. 554 bivio Sestu, I-09042 Monserrato (CA), Italy
| | - Stefania Biffi
- Institute for Maternal and Child Health, Istituto di Ricovero e Cura a Carattere Scientifico Bo Garofolo, Trieste, 34137, Italy
| | - Marco Fornasier
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, s.s. 554 bivio Sestu, I-09042 Monserrato (CA), Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, s.s. 554 bivio Sestu, I-09042 Monserrato (CA), Italy
| | - Giacomo Picci
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, s.s. 554 bivio Sestu, I-09042 Monserrato (CA), Italy
| | - Claudia Caltagirone
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, s.s. 554 bivio Sestu, I-09042 Monserrato (CA), Italy
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7
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Mishra K, Bergfreund J, Bertsch P, Fischer P, Windhab EJ. Crystallization-Induced Network Formation of Tri- and Monopalmitin at the Middle-Chain Triglyceride Oil/Air Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7566-7572. [PMID: 32520568 DOI: 10.1021/acs.langmuir.0c01195] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Crystalline glycerides play an important role in the formation of multiphase systems such as emulsions and foams. The stabilization of oil/water interfaces by glyceride crystals has been extensively studied compared to only few studies which have been dedicated to oil/air interfaces. This study investigates the crystallization and network formation of tripalmitin (TP) and monopalmitin (MP) at the middle-chain triglyceride (MCT) oil/air interface. TP crystals were found to crystallize in the bulk before aggregating as large rectangular crystal conglomerates at the MCT oil/air interface. This leads to the slow formation of a plastic deformable, macroscopic crystal layer with high interfacial rheological moduli. MP crystals form directly at the MCT oil/air interface resulting in a comparatively fast formation of an elastic deformable network. Crystals with tentacle-like morphology were found to be responsible for the network elasticity. In this work, we show how interfacial crystallization dynamics and mechanical strength can be linked to the molecular structure and crystallization behavior of glyceride crystals.
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Affiliation(s)
- Kim Mishra
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Jotam Bergfreund
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Pascal Bertsch
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Peter Fischer
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Erich J Windhab
- Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
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8
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Mertins O, Mathews PD, Angelova A. Advances in the Design of pH-Sensitive Cubosome Liquid Crystalline Nanocarriers for Drug Delivery Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E963. [PMID: 32443582 PMCID: PMC7281514 DOI: 10.3390/nano10050963] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 04/29/2020] [Accepted: 05/03/2020] [Indexed: 01/10/2023]
Abstract
Nanostructure bicontinuous cubic phase self-assembled materials are receiving expanding applications as biocompatible delivery systems in various therapeutic fields. The functionalization of cubosome, spongosome, hexosome and liposome nanocarriers by pH-sensitive lipids and/or pH-sensitive polymer shells offers new opportunities for oral and topical drug delivery towards a new generation of cancer therapies. The electrochemical behavior of drug compounds may favor pH-triggered drug release as well. Here, we highlight recent investigations, which explore the phase behavior of mixed nonlamellar lipid/fatty acid or phospholipid systems for the design of pH-responsive and mucoadhesive drug delivery systems with sustained-release properties. X-ray diffraction and small-angle X-ray scattering (SAXS) techniques are widely used in the development of innovative delivery assemblies through detailed structural analyses of multiple amphiphilic compositions from the lipid/co-lipid/water phase diagrams. pH-responsive nanoscale materials and nanoparticles are required for challenging therapeutic applications such as oral delivery of therapeutic proteins and peptides as well as of poorly water-soluble substances. Perspective nanomedicine developments with smart cubosome nanocarriers may exploit compositions elaborated to overcome the intestinal obstacles, dual-drug loaded pH-sensitive liquid crystalline architectures aiming at enhanced therapeutic efficacy, as well as composite (lipid/polyelectrolyte) types of mucoadhesive controlled release colloidal cubosomal formulations for the improvement of the drugs' bioavailability.
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Affiliation(s)
- Omar Mertins
- Institut Galien Paris-Saclay UMR8612, Université Paris-Saclay, CNRS, F-92296 Châtenay-Malabry, France;
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo (UNIFESP), Sao Paulo 04023-062, Brazil;
| | - Patrick D. Mathews
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo (UNIFESP), Sao Paulo 04023-062, Brazil;
- Muséum National d’Histoire Naturelle, Sorbonne Université, CP 26, 75231 Paris, France
| | - Angelina Angelova
- Institut Galien Paris-Saclay UMR8612, Université Paris-Saclay, CNRS, F-92296 Châtenay-Malabry, France;
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9
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Wang X, Huang L, Zhang Y, Meng F, Donoso M, Haskell R, Luo L. Tunable Two-Compartment On-Demand Sustained Drug Release Based on Lipid Gels. J Pharm Sci 2019; 109:1059-1067. [PMID: 31629734 DOI: 10.1016/j.xphs.2019.10.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 10/07/2019] [Accepted: 10/11/2019] [Indexed: 01/23/2023]
Abstract
The binary-lipid system of soybean phosphatidylcholine (SPC) and glycerol dioleate (GDO) can hydrate to gels on contacting with aqueous mediums, which has emerged as a versatile and promising delivery matrix for extended drug release applications. In the present work, we have characterized the gelation process of this SPC/GDO lyotropic gel (SGLG) system by rheology and evaluated the drug release profiles from the SGLG formulations with different SPC/GDO mass ratios. Our study has demonstrated that simply adjusting the SPC/GDO mass ratio can tune the lipid gelation behavior and modulate the drug release profiles. More importantly, the drug release from the SGLG formulations follows a two-compartment (fast and slow release compartments) release kinetics that has not been reported before. We posit that the fast release compartment corresponds to the passive diffusion of the drug during the early stage of the gel formation. After the boundary gel phase generation, the drug release is then dominated by the slow diffusion process from SGLG. The pharmacokinetic studies in rats match well with the in vitro studies, suggesting that the binary-lipid formulation is an excellent candidate for on-demand sustained drug delivery system.
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Affiliation(s)
- Xiuxia Wang
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Liping Huang
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yiwei Zhang
- School of Mathematics and Statistics, Center for Mathematical Science, Hubei Key Laboratory of Engineering Modeling and Scientific Computing, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Fanling Meng
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Maria Donoso
- Discovery Pharmaceutics, Bristol-Myers Squibb Company, Wallingford, Connecticut 06492
| | | | - Liang Luo
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Discovery Pharmaceutics, Bristol-Myers Squibb Company, Wallingford, Connecticut 06492.
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Mertz N, Østergaard J, Yaghmur A, Larsen SW. Transport characteristics in a novel in vitro release model for testing the performance of intra-articular injectables. Int J Pharm 2019; 566:445-453. [DOI: 10.1016/j.ijpharm.2019.04.083] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/12/2019] [Accepted: 04/13/2019] [Indexed: 12/25/2022]
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11
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Parida S, Carroll KM, Petrakis IL, Sofuoglu M. Buprenorphine treatment for opioid use disorder: recent progress. Expert Rev Clin Pharmacol 2019; 12:791-803. [PMID: 31232604 DOI: 10.1080/17512433.2019.1635454] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Suprit Parida
- VA Connecticut Healthcare System, VA Connecticut Health System West Haven Campus, West Haven, CT, USA
- School of Medicine, Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Kathleen M. Carroll
- School of Medicine, Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Ismene L. Petrakis
- VA Connecticut Healthcare System, VA Connecticut Health System West Haven Campus, West Haven, CT, USA
- School of Medicine, Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Mehmet Sofuoglu
- VA Connecticut Healthcare System, VA Connecticut Health System West Haven Campus, West Haven, CT, USA
- School of Medicine, Department of Psychiatry, Yale University, New Haven, CT, USA
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12
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Prajapati R, Gontsarik M, Yaghmur A, Salentinig S. pH-Responsive Nano-Self-Assemblies of the Anticancer Drug 2-Hydroxyoleic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7954-7961. [PMID: 31150248 DOI: 10.1021/acs.langmuir.9b00838] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
pH-responsive lipid nanocarriers have the potential to selectively target the acidic extracellular pH environment of cancer tissues and may further improve the efficacy of chemotherapeutics by minimizing their toxic side-effects. Here, we present the design and characterization of pH-sensitive nano-self-assemblies of the poorly water-soluble anticancer drug 2-hydroxyoleic acid (2OHOA) with glycerol monooleate (GMO). pH-triggered nanostructural transformations from 2OHOA/GMO nanoparticles with an internal inverse hexagonal structure (hexosomes) at pH around 2.0-3.0, via nanocarriers with an internal inverse bicontinuous cubic structure (cubosomes) at pH 2.0-4.5, to vesicles at pH 4.5-7.4 were observed with synchrotron small-angle X-ray scattering, and cryogenic transmission electron microscopy. ζ-potential measurements highlight that the pH-driven deprotonation of the carboxylic group of 2OHOA, and the resulting charge-repulsions at the lipid-water interface account for these nanostructural alterations. The study provides detailed insight into the pH-dependent self-assembly of 2OHOA with GMO in excess buffer at physiologically relevant pH values, and discusses the effects of pH alterations on modulating their nanostructure. The results may guide the further development of pH-responsive anticancer nanocarriers for the targeted delivery of chemotherapeutics to the local microenvironment of tumor cells.
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Affiliation(s)
- Rama Prajapati
- Department of Pharmacy, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen Ø , Denmark
| | - Mark Gontsarik
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , 9014 St. Gallen , Switzerland
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen Ø , Denmark
| | - Stefan Salentinig
- Laboratory for Biointerfaces , Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5 , 9014 St. Gallen , Switzerland
- Department of Chemistry , University of Fribourg , Chemin du Musée 9 , 1700 Fribourg , Switzerland
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13
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Rosenthal RN. Novel Formulations of Buprenorphine for Treatment of Opioid Use Disorder. FOCUS (AMERICAN PSYCHIATRIC PUBLISHING) 2019; 17:104-109. [PMID: 31975965 PMCID: PMC6527006 DOI: 10.1176/appi.focus.20180043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Opioid use disorder (OUD) is epidemic in the United States. In addition to medical, economic, and social impairments, risk of overdose fatality is high. In 2017, there were 14,958 deaths from natural or semisynthetic opioids, 15,958 from heroin, and 29,406 from synthetic opioids, such as fentanyl. Psychosocial interventions do not add substantial efficacy to medical OUD treatments, and thus making evidence-based OUD treatments more accessible is urgent. However, considerable diversion of oral and transmucosal opioid maintenance medications has been documented. Delivery systems that reduce risks of nonadherence through diversion or altered self-administration may increase buprenorphine's effectiveness for clinical stabilization via increased treatment exposure. The article presents findings from multisite efficacy studies of two subcutaneous depot buprenorphine formulations and a long-acting implant. Novel delivery systems show promise in providing improved outcomes through intermediate- and long-acting exposure to medication while reducing the risk of medication nonadherence, diversion, and accidental exposure.
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Affiliation(s)
- Richard N Rosenthal
- Department of Psychiatry and Behavioral Health, Health Sciences Center, Renaissance School of Medicine at Stony Brook University, Stony Brook, New York
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14
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Prajapati R, Larsen SW, Yaghmur A. Citrem–phosphatidylcholine nano-self-assemblies: solubilization of bupivacaine and its role in triggering a colloidal transition from vesicles to cubosomes and hexosomes. Phys Chem Chem Phys 2019; 21:15142-15150. [DOI: 10.1039/c9cp01878f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In concentration- and lipid composition-dependent manners, bupivacaine triggers lamellar–nonlamellar phase transitions in citrem/soy phosphatidylcholine nanodispersions.
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Affiliation(s)
- Rama Prajapati
- Department of Pharmacy, Faculty of Health and Medical Sciences
- University of Copenhagen
- DK-2100 Copenhagen Ø
- Denmark
| | - Susan Weng Larsen
- Department of Pharmacy, Faculty of Health and Medical Sciences
- University of Copenhagen
- DK-2100 Copenhagen Ø
- Denmark
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences
- University of Copenhagen
- DK-2100 Copenhagen Ø
- Denmark
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15
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Pavel M, Borson-Chazot F, Cailleux A, Hörsch D, Lahner H, Pivonello R, Tauchmanova L, Darstein C, Olsson H, Tiberg F, Ferone D. Octreotide SC depot in patients with acromegaly and functioning neuroendocrine tumors: a phase 2, multicenter study. Cancer Chemother Pharmacol 2018; 83:375-385. [DOI: 10.1007/s00280-018-3734-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/23/2018] [Indexed: 11/25/2022]
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16
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Temperature triggering of kinetically trapped self-assemblies in citrem-phospholipid nanoparticles. Chem Phys Lipids 2018; 216:30-38. [DOI: 10.1016/j.chemphyslip.2018.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/28/2018] [Accepted: 09/05/2018] [Indexed: 11/22/2022]
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17
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Wadsäter M, Barauskas J, Tiberg F, Nylander T. The lipolytic degradation of highly structured cubic micellar nanoparticles of soy phosphatidylcholine and glycerol dioleate by phospholipase A 2 and triacylglycerol lipase. Chem Phys Lipids 2018; 211:86-92. [PMID: 29132829 DOI: 10.1016/j.chemphyslip.2017.11.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 10/05/2017] [Accepted: 11/09/2017] [Indexed: 11/23/2022]
Abstract
The effects of different lipolytic enzymes on the structure of lipid liquid crystalline nano-particles (LCNP) have been investigated by cryogenic transmission electron microscopy (cryo-TEM) and synchrotron small angle X-ray diffraction (SAXD). Here we used highly structured cubic micellar (Fd3m) nanoparticles of 50/50 (wt%/wt%) soy phosphatidyl choline (SPC)/glycerol dioleate (GDO) as substrate. Two types of lipolytic enzymes were used, phospholipase A2 (PLA2) that catalyses degradation of the phospholipid component, SPC, and porcine pancreatic triacylglycerol lipase (TGL) that facilitate the hydrolysis of the diglyceride, GDO. Evolution of the structure was found to be very different and linked to specificity of the two types of enzymes. PLA2, which hydrolyses the lamellar forming component, SPC, induces a reversed micellar lipid phase, while TGL which hydrolysis the reverse phase forming compound, GDO, induces a lamellar phase.
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Affiliation(s)
- Maria Wadsäter
- Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-22100, Lund, Sweden.
| | - Justas Barauskas
- Camurus AB, Ideon Science Park, Gamma Building, Sölvegatan 41, SE-22379, Lund, Sweden(1); Biomedical Science, Faculty of Health and Society, Malmö University, SE-20506, Malmö, Sweden.
| | - Fredrik Tiberg
- Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-22100, Lund, Sweden; Camurus AB, Ideon Science Park, Gamma Building, Sölvegatan 41, SE-22379, Lund, Sweden(1)
| | - Tommy Nylander
- Physical Chemistry, Department of Chemistry, Lund University, P.O. Box 124, SE-22100, Lund, Sweden.
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18
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Liquid crystalline drug delivery vehicles for oral and IV/subcutaneous administration of poorly soluble (and soluble) drugs. Int J Pharm 2018; 539:175-183. [PMID: 29371020 DOI: 10.1016/j.ijpharm.2018.01.037] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/17/2018] [Accepted: 01/20/2018] [Indexed: 01/05/2023]
Abstract
Poorly soluble drug molecules often have low bioavailability issues and absorption problems in the clinical setting. As the number of poorly soluble drugs increases from discovery, developing technologies to enhance their solubility, while also controlling their release is one of the many challenges facing the pharmaceutical industry today. Liquid crystalline systems, nanoparticulate or macro-matrix, self-assemble in the presence of an aqueous environment and can provide a solubility enhancement, while also controlling the drug release rate. This review examines the fundamentals of liquid crystalline systems through the representative literature, concluding with examples of liquid crystalline systems in clinical trials development. The review focus is on the potential of utilizing liquid crystalline systems for poorly soluble drugs, in the areas of oral delivery and IV/subcutaneous, followed by water soluble molecules. Key considerations in utilizing liquid crystalline systems advantages while also discussing potential areas of key research that may be needed will be highlighted.
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19
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Xu Y, Li V, Li J, Pan D, Langenbucher G, Mathias N. Characterization of a Liquid Crystal System for Sustained Release of a Peptide BMS-686117. AAPS PharmSciTech 2018; 19:348-357. [PMID: 28741139 DOI: 10.1208/s12249-017-0835-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/09/2017] [Indexed: 11/30/2022] Open
Abstract
Liquid crystal lipid-based formulations are an effective approach to prolong pharmacokinetics and reduce burst release of a drug on subcutaneous delivery. The objective of this paper was to investigate the influence of phase structures of a lipid-based liquid crystal delivery system and its associated mechanical properties on the release profile of a peptide. It was hypothesized that release of drug molecules are closely related to the mechanical properties that are controlled by phase structures. Experimentally, the relationship between phase structures of lipid liquid crystal system-soy phosphatidyl choline (SPC) and glycerol dioleate (GDO) in water were characterized by polarized light microscopy and small angle X-ray diffraction. Their rheological properties were evaluated with a rheometer and the in vitro release of the peptide as a measure drug release from the LC-depot injection. Three phases: disordered phase, lamellar phase, mixtures of cubic, lamellar, and hexagonal phases were detected by varying formulation compositions. A significant difference in rheological behavior was observed. The disordered phase displayed some attributes of typical Newtonian fluid with lowest viscosity while the lamellar phase showed a shear thinning behavior. Regarding the mechanical strength, the lamellar phase presents the highest storage modulus due to its layer structure followed by mixed phases. Comparing release profiles, the lamellar phase produced a fast release followed by the mixture of phases. In conclusion, this study demonstrates the ability to characterize LC phase structures with microscopy, small angle X-ray diffraction, and rheological measurements and their link to modulating a peptide release profile.
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20
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Göke K, Bunjes H. Carrier characteristics influence the kinetics of passive drug loading into lipid nanoemulsions. Eur J Pharm Biopharm 2017; 126:132-139. [PMID: 28807819 DOI: 10.1016/j.ejpb.2017.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 08/10/2017] [Indexed: 12/30/2022]
Abstract
Passive loading as a novel screening approach is a material-saving tool for the efficient selection of a suitable colloidal lipid carrier system for poorly water soluble drug candidates. This method comprises incubation of preformed carrier systems with drug powder and subsequent determination of the resulting drug load of the carrier particles after removal of excess drug. For reliable routine use and to obtain meaningful loading results, information on the kinetics of the process is required. Passive loading proceeds via a dissolution-diffusion-based mechanism, where drug surface area and drug water solubility are key parameters for fast passive loading. While the influence of the drug characteristics is mostly understood, the influence of the carrier characteristics remains unknown. The aim of this study was to examine how the lipid nanocarriers' characteristics, i.e. the type of lipid, the lipid content and the particle size, influence the kinetics of passive loading. Fenofibrate was used as model drug and the loading progress was analyzed by UV spectroscopy. The saturation solubility in the nanocarrier particles, i.e. the lipid type, did not influence the passive loading rate constant. Low lipid content in the nanocarrier and a small nanocarrier particle size both increased passive loading speed. Both variations increase the diffusivity of the nanocarrier particles, which is the primary cause for fast loading at these conditions: The quicker the carrier particles diffuse, the higher is the speed of passive loading. The influence of the diffusivity of the lipid nanocarriers and the effect of drug dissolution rate were included in an overall mechanistic model developed for similar processes (A. Balakrishnan, B.D. Rege, G.L. Amidon, J.E. Polli, Surfactant-mediated dissolution: contributions of solubility enhancement and relatively low micelle diffusivity, J. Pharm. Sci. 93 (2004) 2064-2075). The resulting mechanistic model gave a good estimate of the speed of passive loading in nanoemulsions. Whilst the drug's characteristics - apart from drug surface area - are basically fixed, the lipid nanocarriers can be customized to improve passive loading speed, e.g. by using small nanocarrier particles. The knowledge of the loading mechanism now allows the use of passive loading for the straightforward, material-saving selection of suitable lipid drug nanocarriers.
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Affiliation(s)
- Katrin Göke
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstraße 1, 38106 Braunschweig, Germany; Zentrum für Pharmaverfahrenstechnik, Franz-Liszt-Straße 35a, 38106 Braunschweig, Germany
| | - Heike Bunjes
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstraße 1, 38106 Braunschweig, Germany; Zentrum für Pharmaverfahrenstechnik, Franz-Liszt-Straße 35a, 38106 Braunschweig, Germany.
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21
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Linkevičiūtė A, Būdienė J, Naujalis E, Katelnikovas A, Barauskas J. Characterization and stability study of cranberry flavonoids in lipid liquid crystalline systems. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aušra Linkevičiūtė
- Center for Physical Sciences and TechnologyState Research InstituteVilniusLithuania
| | - Jurga Būdienė
- Center for Physical Sciences and TechnologyState Research InstituteVilniusLithuania
| | - Evaldas Naujalis
- Center for Physical Sciences and TechnologyState Research InstituteVilniusLithuania
- Department of Analytical and Environmental ChemistryVilnius UniversityVilniusLithuania
| | - Arturas Katelnikovas
- Department of Analytical and Environmental ChemistryVilnius UniversityVilniusLithuania
| | - Justas Barauskas
- Biomedical ScienceFaculty of Health and SocietyMalmö UniversityMalmöSweden
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22
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Drug solubility in lipid nanocarriers: Influence of lipid matrix and available interfacial area. Int J Pharm 2017; 529:617-628. [DOI: 10.1016/j.ijpharm.2017.07.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/06/2017] [Accepted: 07/08/2017] [Indexed: 01/12/2023]
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23
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Göke K, Lorenz T, Repanas A, Schneider F, Steiner D, Baumann K, Bunjes H, Dietzel A, Finke JH, Glasmacher B, Kwade A. Novel strategies for the formulation and processing of poorly water-soluble drugs. Eur J Pharm Biopharm 2017; 126:40-56. [PMID: 28532676 DOI: 10.1016/j.ejpb.2017.05.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 05/10/2017] [Accepted: 05/15/2017] [Indexed: 12/31/2022]
Abstract
Low aqueous solubility of active pharmaceutical ingredients presents a serious challenge in the development process of new drug products. This article provides an overview on some of the current approaches for the formulation of poorly water-soluble drugs with a special focus on strategies pursued at the Center of Pharmaceutical Engineering of the TU Braunschweig. These comprise formulation in lipid-based colloidal drug delivery systems and experimental as well as computational approaches towards the efficient identification of the most suitable carrier systems. For less lipophilic substances the preparation of drug nanoparticles by milling and precipitation is investigated for instance by means of microsystem-based manufacturing techniques and with special regard to the preparation of individualized dosage forms. Another option to overcome issues with poor drug solubility is the incorporation into nanospun fibers.
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Affiliation(s)
- Katrin Göke
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstr. 1, 38106 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Thomas Lorenz
- Technische Universität Braunschweig, Institut für Mikrotechnik, Alte Salzdahlumer Str. 203, 38124 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Alexandros Repanas
- Leibniz Universität Hannover, Institut für Mehrphasenprozesse, Callinstr. 36, 30167 Hannover, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Frederic Schneider
- Technische Universität Braunschweig, Institut für Medizinische und Pharmazeutische Chemie, Beethovenstr. 55, 38106 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Denise Steiner
- Technische Universität Braunschweig, Institut für Partikeltechnik, Volkmaroder Str. 5, 38104 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Knut Baumann
- Technische Universität Braunschweig, Institut für Medizinische und Pharmazeutische Chemie, Beethovenstr. 55, 38106 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Heike Bunjes
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstr. 1, 38106 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Andreas Dietzel
- Technische Universität Braunschweig, Institut für Mikrotechnik, Alte Salzdahlumer Str. 203, 38124 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Jan H Finke
- Technische Universität Braunschweig, Institut für Partikeltechnik, Volkmaroder Str. 5, 38104 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Birgit Glasmacher
- Leibniz Universität Hannover, Institut für Mehrphasenprozesse, Callinstr. 36, 30167 Hannover, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
| | - Arno Kwade
- Technische Universität Braunschweig, Institut für Partikeltechnik, Volkmaroder Str. 5, 38104 Braunschweig, Germany; Technische Universität Braunschweig, Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Str. 35a, 38106 Braunschweig, Germany.
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Göke K, Bunjes H. Parameters influencing the course of passive drug loading into lipid nanoemulsions. Eur J Pharm Biopharm 2017; 126:123-131. [PMID: 28529070 DOI: 10.1016/j.ejpb.2017.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/02/2017] [Accepted: 05/15/2017] [Indexed: 12/25/2022]
Abstract
Passive drug loading can be used to effectively identify suitable colloidal lipid carrier systems for poorly water-soluble drugs. This method comprises incubation of preformed carrier systems with drug powder and subsequent determination of the resulting drug load of the carrier particles. Until now, the passive loading mechanism is unknown, which complicates reliable routine use. In this work, the influence of drug characteristics on the course of passive loading was investigated systematically varying drug surface area and drug solubility. Fenofibrate and flufenamic acid were used as model drugs; the carrier system was a trimyristin nanodispersion. Loading progress was analyzed by UV spectroscopy or by a novel method based on differential scanning calorimetry. While increasing drug solubility by micelle incorporation did not speed up passive loading, a large drug surface area and high water solubility were key parameters for fast loading. Since both factors are crucial in drug dissolution as described by the Noyes-Whitney equation, these findings point to a dissolution-diffusion-based passive loading mechanism. Accordingly, passive loading also occurred when drug and carrier particles were separated by a dialysis membrane. Knowledge of the loading mechanism allows optimizing the conditions for future passive loading studies and assessing the limitations of the method.
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Affiliation(s)
- Katrin Göke
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstraße 1 & Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Straße 35a, 38106 Braunschweig, Germany
| | - Heike Bunjes
- Technische Universität Braunschweig, Institut für Pharmazeutische Technologie, Mendelssohnstraße 1 & Zentrum für Pharmaverfahrenstechnik (PVZ), Franz-Liszt-Straße 35a, 38106 Braunschweig, Germany.
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25
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Öberg K, Lamberts SWJ. Somatostatin analogues in acromegaly and gastroenteropancreatic neuroendocrine tumours: past, present and future. Endocr Relat Cancer 2016; 23:R551-R566. [PMID: 27697899 DOI: 10.1530/erc-16-0151] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/03/2016] [Indexed: 11/08/2022]
Abstract
Acromegaly is a hormonal disorder that arises when the pituitary gland secretes excess growth hormone (GH), which in turn stimulates a concomitant increase in serum insulin-like growth factor 1 (IGF-1) levels. Gastroenteropancreatic neuroendocrine tumours (GEP-NET) constitute a heterogeneous group of tumours that can secrete serotonin and a variety of peptide hormones that may cause characteristic symptoms known as carcinoid syndrome or other symptoms and hormonal hypersecretion syndromes depending on the tumour's site of origin. Current medical therapy for the treatment of acromegaly and GEP-NET involves the administration of somatostatin analogues that effectively suppress excess hormone secretion. After its discovery in 1979, octreotide became the first synthetic biologically stable somatostatin analogue with a short-acting formulation of octreotide introduced into clinical practice in the late 1980s. Lanreotide, another somatostatin analogue, became available in the mid-1990s initially as a prolonged-release formulation administered every 10 or 14 days. Long-acting release formulations of both octreotide (Sandostatin LAR and Novartis) and lanreotide (Somatuline Autogel, Ipsen), based on microparticle and nanoparticle drug-delivery technologies, respectively, were later developed, which allowed for once-monthly administration and improved convenience. First-generation somatostatin analogues remain one of the cornerstones of medical therapy in the management of pituitary and GEP-NET hormone hypersecretion, with octreotide having the longest established efficacy and safety profile of the somatostatin analogue class. More recently, pasireotide (Signifor), a next-generation multireceptor-targeted somatostatin analogue, has emerged as an alternative therapeutic option for the treatment of acromegaly. This review summarizes the development and clinical success of somatostatin analogues.
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Báez-Santos YM, Otte A, Mun EA, Soh BK, Song CG, Lee YN, Park K. Formulation and characterization of a liquid crystalline hexagonal mesophase region of phosphatidylcholine, sorbitan monooleate, and tocopherol acetate for sustained delivery of leuprolide acetate. Int J Pharm 2016; 514:314-321. [DOI: 10.1016/j.ijpharm.2016.06.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/10/2016] [Accepted: 06/30/2016] [Indexed: 01/23/2023]
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27
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Topgaard D. Director orientations in lyotropic liquid crystals: diffusion MRI mapping of the Saupe order tensor. Phys Chem Chem Phys 2016; 18:8545-53. [PMID: 26948308 DOI: 10.1039/c5cp07251d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The macroscopic physical properties of a liquid crystalline material depend on both the properties of the individual crystallites and the details of their spatial arrangement. We propose a diffusion MRI method to estimate the director orientations of a lyotropic liquid crystal as a spatially resolved field of Saupe order tensors. The method relies on varying the shape of the diffusion-encoding tensor to disentangle the effects of voxel-scale director orientational order and the local diffusion anisotropy of the solvent. Proof-of-concept experiments are performed on water in lamellar and reverse hexagonal liquid crystalline systems with intricate patterns of director orientations.
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Affiliation(s)
- Daniel Topgaard
- Division of Physical Chemistry, Department of Chemistry, Lund University, Lund, Sweden.
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28
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Tiberg F, Roberts J, Cervin C, Johnsson M, Sarp S, Tripathi AP, Linden M. Octreotide s.c. depot provides sustained octreotide bioavailability and similar IGF-1 suppression to octreotide LAR in healthy volunteers. Br J Clin Pharmacol 2015; 80:460-72. [PMID: 26076191 PMCID: PMC4574831 DOI: 10.1111/bcp.12698] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 04/22/2015] [Accepted: 06/08/2015] [Indexed: 02/05/2023] Open
Abstract
Aims The aim was to assess the pharmacokinetics, pharmacodynamics, safety and tolerability of octreotide subcutaneous (s.c.) depot, a novel octreotide formulation. Methods This was a phase I, randomized, open label study. After a single dose of octreotide immediate release (IR) 200 µg, subjects were randomized to one of eight groups to receive three monthly injections of octreotide s.c. depot A 10, 20 or 30 mg, B 30 mg, C 10, 20 or 30 mg or long acting octreotide (octreotide LAR) 30 mg. Results One hundred and twenty-two subjects were randomized. For all depot variants, onset of octreotide release was rapid and sustained for up to 4 weeks. The relative octreotide bioavailability of depot variants vs. octreotide IR ranged from 0.68 (90% confidence interval [CI] 0.61, 0.76) to 0.91 (90% CI 0.81, 1.02) and, vs. octreotide LAR, was approximately four- to five-fold greater: 3.97 (90% CI 3.35, 4.71) to 5.27 ng ml–1 h (90% CI 4.43, 6.27). All depot variants showed relatively rapid initial reductions of insulin-like growth factor 1 (IGF-1) compared with octreotide LAR. A trend of octreotide dose dependence was also indicated from the plasma concentrations and suppression of IGF-1. Maximum inhibition of IGF-1 at steady-state was highest for depot B and C. All depot treatments were well tolerated. The most frequent adverse events were gastrointestinal related. Conclusions Octreotide s.c. depot provides greater octreotide bioavailability with a more rapid onset and stronger suppression of IGF-1 than octreotide LAR in healthy volunteers.
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Affiliation(s)
- Fredrik Tiberg
- Camurus AB, Lund.,Physical Chemistry, Lund University, Lund, Sweden
| | - John Roberts
- Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA
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29
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Preparation and characterization of quercetin-loaded lipid liquid crystalline systems. Colloids Surf B Biointerfaces 2015; 128:296-303. [DOI: 10.1016/j.colsurfb.2015.02.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 01/22/2015] [Accepted: 02/01/2015] [Indexed: 12/29/2022]
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30
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Wadsäter M, Barauskas J, Nylander T, Tiberg F. Formation of highly structured cubic micellar lipid nanoparticles of soy phosphatidylcholine and glycerol dioleate and their degradation by triacylglycerol lipase. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7063-9. [PMID: 24779728 DOI: 10.1021/am501489e] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Lipid nanoparticles of reversed internal phase structures, such as cubic micellar (I2) structure show good drug loading ability of peptides and proteins as well as some small molecules. Due to their controllable small size and inner morphology, such nanoparticles are suitable for drug delivery using several different administration routes, including intravenous, intramuscular, and subcutaneous injection. A very interesting system in this regard, is the two component soy phosphatidylcholine (SPC)/glycerol dioleate (GDO) system, which depending on the ratio of the lipid components form a range of reversed liquid crystalline phases. For a 50/50 (w/w) ratio in excess water, these lipids have been shown to form a reversed cubic micellar (I2) phase of the Fd3m structure. Here, we demonstrate that this SPC/GDO phase, in the presence of small quantities (5-10 wt %) of Polysorbate 80 (P80), can be dispersed into nanoparticles, still with well-defined Fd3m structure. The resulting nanoparticle dispersion has a narrow size distribution and exhibit good long-term stability. In pharmaceutical applications, biodegradation pathways of the drug delivery vehicles and their components are important considerations. In the second part of the study we show how the structure of the particles evolves during exposure to a triacylglycerol lipase (TGL) under physiological-like temperature and pH. TGL catalyzes the lipolytic degradation of acylglycerides, such as GDO, to monoglycerides, glycerol, and free fatty acids. During the degradation, the interior phase of the particles is shown to undergo continuous phase transitions from the reversed I2 structure to structures of less negative curvature (2D hexagonal, bicontinuous cubic, and sponge), ultimately resulting in the formation of multilamellar vesicles.
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Affiliation(s)
- Maria Wadsäter
- Department of Physical Chemistry, Lund University , P.O. Box 124, SE-22100 Lund, Sweden
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Barauskas J, Christerson L, Wadsäter M, Lindström F, Lindqvist AK, Tiberg F. Bioadhesive lipid compositions: self-assembly structures, functionality, and medical applications. Mol Pharm 2014; 11:895-903. [PMID: 24422996 DOI: 10.1021/mp400552u] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lipid-based liquid crystalline compositions of phospholipids and diglycerides have unique bioadhesive properties with several medical applications, as exemplified by a lipid-based medical device indicated for management and relief of intraoral pain. The present paper describes the relation between self-assembly properties of phosphatidyl choline (PC) and glycerol dioleate (GDO) mixtures in the presence of aqueous fluids and functional attributes of the system, including: film formation and bioadhesion, intraoral coverage, acceptance by patients, and potential as a drug delivery system. The phase behavior of PC/GDO was characterized using synchrotron small-angle X-ray scattering. Functional properties, including the presence of study formulations at intraoral surfaces, ease of attachment, taste, and degree of and intraoral pain, were assessed in a crossover clinical pilot study in head and neck cancer patients. An optimum in functional properties was indicated for formulations with a PC/GDO weight ratio of about 35/65, where the lipids form a reversed cubic liquid crystalline micellar phase structure (Fd3m space group) over the relevant temperature range (25-40 °C).
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Affiliation(s)
- Justas Barauskas
- Biomedical Science, Faculty of Health and Society, Malmö University , SE-20506 Malmö, Sweden
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Sagalowicz L, Guillot S, Acquistapace S, Schmitt B, Maurer M, Yaghmur A, de Campo L, Rouvet M, Leser M, Glatter O. Influence of vitamin E acetate and other lipids on the phase behavior of mesophases based on unsaturated monoglycerides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8222-8232. [PMID: 23705681 DOI: 10.1021/la305052q] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The phase behavior of the ternary unsaturated monoglycerides (UMG)-DL-α-tocopheryl acetate-water system has been studied. The effects of lipid composition in both bulk and dispersed lyotropic liquid crystalline phases and microemulsions were investigated. In excess water, progressive addition of DL-α-tocopheryl acetate to a binary UMG mixture results in the following phase sequence: reversed bicontinuous cubic phase, reversed hexagonal (H(II)) phase, and a reversed microemulsion. The action of DL-α-tocopheryl acetate is then compared to that of other lipids such as triolein, limonene, tetradecane, and DL-α-tocopherol. The impact of solubilizing these hydrophobic molecules on the UMG-water phase behavior shows some common features. However, the solubilization of certain molecules, like DL-α-tocopherol, leads to the presence of the reversed micellar cubic phase (space group number 227 and symmetry Fd3m) while the solubilization of others does not. These differences in phase behavior are discussed in terms of physical-chemical characteristics of the added lipid molecule and its interaction with UMG and water. From an applications point of view, phase behavior as a function of the solubilized content of guest molecules (lipid additive in our case) is crucial since macroscopic properties such as molecular release depend strongly on the phase present. The effect of two hydrophilic emulsifiers, used to stabilize the aqueous dispersions of UMG, was studied and compared. Those were Pluronic F127, which is the most commonly used stabilizer for these kinds of inverted type structures, and the partially hydrolyzed emulsifier lecithin (Emultop EP), which is a well accepted food-grade emulsifier. The phase behavior of particles stabilized by the partially hydrolyzed lecithin is similar to that of bulk sample at full hydration, but this emulsifier interacts significantly with the internal structure and affects it much more than F127.
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Affiliation(s)
- L Sagalowicz
- Nestlé Research Center, Vers-Chez-Les-Blanc, CH-1000 Lausanne 26, Switzerland.
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Klang V, Valenta C, Matsko NB. Electron microscopy of pharmaceutical systems. Micron 2013; 44:45-74. [DOI: 10.1016/j.micron.2012.07.008] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 07/26/2012] [Accepted: 07/30/2012] [Indexed: 11/27/2022]
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Thapa R, Baskaran R, Madheswaran T, Rhyu J, Kim J, Yong C, Yoo B. Effect of saturated fatty acids on tacrolimus-loaded liquid crystalline nanoparticles. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50021-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Andersson Trojer M, Nordstierna L, Nordin M, Nydén M, Holmberg K. Encapsulation of actives for sustained release. Phys Chem Chem Phys 2013; 15:17727-41. [DOI: 10.1039/c3cp52686k] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Tiberg F, Johnsson M, Jankunec M, Barauskas J. Phase Behavior, Functions, and Medical Applications of Soy Phosphatidylcholine and Diglyceride Lipid Compositions. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1090] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | | | - Justas Barauskas
- Vilnius University Institute of Biochemistry
- Biomedical Science, Faculty of Health and Society, Malmö University
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Chang DP, Jankunec M, Barauskas J, Tiberg F, Nylander T. Adsorption of lipid liquid crystalline nanoparticles: effects of particle composition, internal structure, and phase behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10688-10696. [PMID: 22725977 DOI: 10.1021/la301579g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Controlling the interfacial behavior and properties of lipid liquid crystalline nanoparticles (LCNPs) at surfaces is essential for their application for preparing functional surface coatings as well as understanding some aspects of their properties as drug delivery vehicles. Here we have studied a LCNP system formed by mixing soy phosphatidylcholine (SPC), forming liquid crystalline lamellar structures in excess water, and glycerol dioleate (GDO), forming reversed structures, dispersed into nanoparticle with the surfactant polysorbate 80 (P80) as stabilizer. LCNP particle properties were controlled by using different ratios of the lipid building blocks as well as different concentrations of the surfactant P80. The LCNP size, internal structure, morphology, and charge were characterized by dynamic light scattering (DLS), synchrotron small-ange X-ray scattering (SAXS), cryo-transmission electron microscopy (cryo-TEM), and zeta potential measurements, respectively. With increasing SPC to GDO ratio in the interval from 35:65 to 60:40, the bulk lipid phase structure goes from reversed cubic micellar phase with Fd3m space group to reversed hexagonal phase. Adding P80 results in a successive shift toward more disorganized lamellar type of structures. This is also seen from cryo-TEM images for the LCNPs, where higher P80 ratios results in more extended lamellar layers surrounding the inner, more dense, lipid-rich particle core with nonlamellar structure. When put in contact with a solid silica surface, the LCNPs adsorb to form multilayer structures with a surface excess and thickness values that increase strongly with the content of P80 and decreases with increasing SPC:GDO ratio. This is reflected in both the adsorption rate and steady-state values, indicating that the driving force for adsorption is largely governed by attractive interactions between poly(ethylene oxide) (PEO) units of the P80 stabilizer and the silica surface. On cationic surface, i.e., silica modified with 3-aminopropltriethoxysilane (APTES), the slightly negatively charged LCNPs give rise to a very significant adsorption, which is relatively independent of LCNP composition. Finally, the dynamic thickness measurements indicate that direct adsorption of intact particles occurred on the cationic surface, while a slow buildup of the layer thickness with time is seen for the weakly interacting systems.
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Affiliation(s)
- Debby P Chang
- Physical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
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Angelova A, Angelov B, Garamus VM, Couvreur P, Lesieur S. Small-Angle X-ray Scattering Investigations of Biomolecular Confinement, Loading, and Release from Liquid-Crystalline Nanochannel Assemblies. J Phys Chem Lett 2012; 3:445-457. [PMID: 26285865 DOI: 10.1021/jz2014727] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This Perspective explores the recent progress made by means of small-angle scattering methods in structural studies of phase transitions in amphiphilic liquid-crystalline systems with nanochannel architectures and outlines some future directions in the area of hierarchically organized and stimuli-responsive nanochanneled assemblies involving biomolecules. Time-resolved small-angle X-ray scattering investigations using synchrotron radiation enable monitoring of the structural dynamics, the modulation of the nanochannel hydration, as well as the key changes in the soft matter liquid-crystalline organization upon stimuli-induced phase transitions. They permit establishing of the inner nanostructure transformation kinetics and determination of the precise sizes of the hydrophobic membraneous compartments and the aqueous channel diameters in self-assembled network architectures. Time-resolved structural studies accelerate novel biomedical, pharmaceutical, and nanotechnology applications of nanochannel soft materials by providing better control of DNA, peptide and protein nanoconfinement, and release from diverse stimuli-responsive nanocarrier systems.
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Affiliation(s)
- Angelina Angelova
- †CNRS UMR8612 Physico-chimie-Pharmacotechnie-Biopharmacie, Univ Paris Sud 11, Châtenay-Malabry, F-92296 France
| | - Borislav Angelov
- ‡Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 16206 Prague, Czech Republic
| | - Vasil M Garamus
- §Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, 21502 Geesthacht, Germany
| | - Patrick Couvreur
- †CNRS UMR8612 Physico-chimie-Pharmacotechnie-Biopharmacie, Univ Paris Sud 11, Châtenay-Malabry, F-92296 France
| | - Sylviane Lesieur
- †CNRS UMR8612 Physico-chimie-Pharmacotechnie-Biopharmacie, Univ Paris Sud 11, Châtenay-Malabry, F-92296 France
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Ariga K, Vinu A, Yamauchi Y, Ji Q, Hill JP. Nanoarchitectonics for Mesoporous Materials. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2012. [DOI: 10.1246/bcsj.20110162] [Citation(s) in RCA: 609] [Impact Index Per Article: 50.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
- JST, CREST
| | - Ajayan Vinu
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
- Australian Institute for Bioengineering and Nanotechnology (AIBN), Corner College and Cooper Rds (Bldg 75), The University of Queensland
| | - Yusuke Yamauchi
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
- Faculty of Science and Engineering, Waseda University
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST)
| | - Qingmin Ji
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
| | - Jonathan P. Hill
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
- JST, CREST
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