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Nazarova A, Yakimova L, Filimonova D, Stoikov I. Surfactant Effect on the Physicochemical Characteristics of Solid Lipid Nanoparticles Based on Pillar[5]arenes. Int J Mol Sci 2022; 23:779. [PMID: 35054962 PMCID: PMC8775580 DOI: 10.3390/ijms23020779] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/08/2022] [Accepted: 01/10/2022] [Indexed: 12/05/2022] Open
Abstract
Novel monosubstituted pillar[5]arenes containing both amide and carboxyl functional groups were synthesized. Solid lipid nanoparticles based on the synthesized macrocycles were obtained. Formation of spherical particles with an average hydrodynamic diameter of 250 nm was shown for pillar[5]arenes containing N-(amidoalkyl)amide fragments regardless of their concentration. It was established that pillar[5]arene containing N-alkylamide fragments can form spherical particles with two different sizes (88 and 223 nm) depending on its concentration. Mixed solid lipid nanoparticles based on monosubstituted pillar[5]arenes and surfactant (dodecyltrimethylammonium chloride) were obtained for the first time. The surfactant made it possible to level the effect of the macrocycle concentration. It was found that various types of aggregates are formed depending on the macrocycle/surfactant ratio. Changing the macrocycle/surfactant ratio allows to control the charge of the particles surface. This controlled property will lead to the creation of molecular-scale porous materials that selectively interact with various types of substrates, including biopolymers.
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Affiliation(s)
- Anastasia Nazarova
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia;
| | - Luidmila Yakimova
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia;
| | | | - Ivan Stoikov
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia;
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Reczyńska-Kolman K, Hartman K, Kwiecień K, Brzychczy-Włoch M, Pamuła E. Composites Based on Gellan Gum, Alginate and Nisin-Enriched Lipid Nanoparticles for the Treatment of Infected Wounds. Int J Mol Sci 2021; 23:ijms23010321. [PMID: 35008746 PMCID: PMC8745171 DOI: 10.3390/ijms23010321] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/21/2021] [Accepted: 12/25/2021] [Indexed: 12/31/2022] Open
Abstract
Due to growing antimicrobial resistance to antibiotics, novel methods of treatment of infected wounds are being searched for. The aim of this research was to develop a composite wound dressing based on natural polysaccharides, i.e., gellan gum (GG) and a mixture of GG and alginate (GG/Alg), containing lipid nanoparticles loaded with antibacterial peptide-nisin (NSN). NSN-loaded stearic acid-based nanoparticles (NP_NSN) were spherical with an average particle size of around 300 nm and were cytocompatible with L929 fibroblasts for up to 500 µg/mL. GG and GG/Alg sponges containing either free NSN (GG + NSN and GG/Alg + NSN) or NP_NSN (GG + NP_NSN and GG/Alg + NP_NSN) were highly porous with a high swelling capacity (swelling ratio above 2000%). Encapsulation of NSN within lipid nanoparticles significantly slowed down NSN release from GG-based samples for up to 24 h (as compared to GG + NSN). The most effective antimicrobial activity against Gram-positive Streptococcus pyogenes was observed for GG + NP_NSN, while in GG/Alg it was decreased by interactions between NSN and Alg, leading to NSN retention within the hydrogel matrix. All materials, except GG/Alg + NP_NSN, were cytocompatible with L929 fibroblasts and did not cause an observable delay in wound healing. We believe that the developed materials are promising for wound healing application and the treatment of bacterial infections in wounds.
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Affiliation(s)
- Katarzyna Reczyńska-Kolman
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;
- Correspondence: (K.R.-K.); (E.P.); Tel.: +48-126-172-338 (K.R.-K.); +48-12-617-44-48 (E.P.)
| | - Kinga Hartman
- Department of Analytical Chemistry and Biochemistry, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;
| | - Konrad Kwiecień
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;
| | - Monika Brzychczy-Włoch
- Department of Molecular Medical Microbiology, Faculty of Medicine, Medical College, Jagiellonian University, Ul. Czysta 18, 31-121 Kraków, Poland;
| | - Elżbieta Pamuła
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland;
- Correspondence: (K.R.-K.); (E.P.); Tel.: +48-126-172-338 (K.R.-K.); +48-12-617-44-48 (E.P.)
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Shirakawa M, Zaboronok A, Nakai K, Sato Y, Kayaki S, Sakai T, Tsurubuchi T, Yoshida F, Nishiyama T, Suzuki M, Tomida H, Matsumura A. A Novel Boron Lipid to Modify Liposomal Surfaces for Boron Neutron Capture Therapy. Cells 2021; 10:cells10123421. [PMID: 34943929 PMCID: PMC8699917 DOI: 10.3390/cells10123421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 11/18/2022] Open
Abstract
Boron neutron capture therapy (BNCT) is a cancer treatment with clinically demonstrated efficacy using boronophenylalanine (BPA) and sodium mercaptododecaborate (BSH). However, tumor tissue selectivity of BSH and retention of BPA in tumor cells is a constant problem. To ensure boron accumulation and retention in tumor tissues, we designed a novel polyethylene glycol (PEG)-based boron-containing lipid (PBL) and examined the potency of delivery of boron using novel PBL-containing liposomes, facilitated by the enhanced permeability and retention (EPR) effect. PBL was synthesized by the reaction of distearoylphosphoethanolamine and BSH linked by PEG with Michael addition while liposomes modified using PBL were prepared from the mixed lipid at a constant molar ratio. In this manner, novel boron liposomes featuring BSH in the liposomal surfaces, instead of being encapsulated in the inner aqueous phase or incorporated in the lipid bilayer membrane, were prepared. These PBL liposomes also carry additional payload capacity for more boron compounds (or anticancer agents) in their inner aqueous phase. The findings demonstrated that PBL liposomes are promising candidates to effect suitable boron accumulation for BNCT.
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Affiliation(s)
- Makoto Shirakawa
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
- Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan; (K.N.); (A.M.)
- Correspondence: ; Tel.: +81-84-936-2112
| | - Alexander Zaboronok
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Japan; (A.Z.); (T.T.); (F.Y.)
| | - Kei Nakai
- Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan; (K.N.); (A.M.)
| | - Yuhki Sato
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
| | - Sho Kayaki
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
| | - Tomonori Sakai
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
| | - Takao Tsurubuchi
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Japan; (A.Z.); (T.T.); (F.Y.)
| | - Fumiyo Yoshida
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Japan; (A.Z.); (T.T.); (F.Y.)
| | - Takashi Nishiyama
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
| | - Minoru Suzuki
- Institute for Integrated Radiation and Nuclear science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan; (M.S.)
| | - Hisao Tomida
- Department of Pharmaceutical Sciences, Fukuyama University, 1-985 Higashimuracho-Sanzo, Fukuyama, Hiroshima 729-0292, Japan; (Y.S.); (S.K.); (T.S.); (T.N.); (H.T.)
| | - Akira Matsumura
- Department of Radiation Oncology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan; (K.N.); (A.M.)
- Ibaraki Prefectural University of Health Sciences, 4669-2 Amicho, Inashiki 300-0394, Ibaraki, Japan
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Milowska K, Rodacka A, Melikishvili S, Buczkowski A, Pałecz B, Waczulikova I, Hianik T, Majoral JP, Ionov M, Bryszewska M. Dendrimeric HIV-peptide delivery nanosystem affects lipid membranes structure. Sci Rep 2021; 11:16810. [PMID: 34413368 PMCID: PMC8376938 DOI: 10.1038/s41598-021-96194-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 08/03/2021] [Indexed: 11/08/2022] Open
Abstract
The aim of this study was to evaluate the nature and mechanisms of interaction between HIV peptide/dendrimer complexes (dendriplex) and artificial lipid membranes, such as large unilayered vesicles (LUV) and lipid monolayers in the air-water interface. Dendriplexes were combined as one of three HIV-derived peptides (Gp160, P24 and Nef) and one of two cationic phosphorus dendrimers (CPD-G3 and CPD-G4). LUVs were formed of 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC) or of a mixture of DMPC and dipalmitoyl-phosphatidylglycerol (DPPG). Interactions between dendriplexes and vesicles were characterized by dynamic light scattering (DLS), fluorescence anisotropy, differential scanning calorimetry (DSC) and Langmuir-Blodgett methods. The morphology of formed systems was examined by transmission electron microscopy (TEM). The results suggest that dendriplexes interact with both hydrophobic and hydrophilic regions of lipid bilayers. The interactions between dendriplexes and negatively charged lipids (DMPC-DPPG) were stronger than those between dendriplexes and liposomes composed of zwitterionic lipids (DMPC). The former were primarily of electrostatic nature due to the positive charge of dendriplexes and the negative charge of the membrane, whereas the latter can be attributed to disturbances in the hydrophobic domain of the membrane. Obtained results provide new information about mechanisms of interaction between lipid membranes and nanocomplexes formed with HIV-derived peptides and phosphorus dendrimers. These data could be important for the choosing the appropriate antigen delivery vehicle in the new vaccines against HIV infection.
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Affiliation(s)
- Katarzyna Milowska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236, Lodz, Poland
| | - Aleksandra Rodacka
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236, Lodz, Poland
| | - Sophie Melikishvili
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48, Bratislava, Slovakia
| | - Adam Buczkowski
- Unit of Biophysical Chemistry, Department of Physical Chemistry, Faculty of Chemistry, 165 Pomorska St., 90-236, University of Lodz, Lodz, Poland
| | - Bartlomiej Pałecz
- Unit of Biophysical Chemistry, Department of Physical Chemistry, Faculty of Chemistry, 165 Pomorska St., 90-236, University of Lodz, Lodz, Poland
| | - Iveta Waczulikova
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48, Bratislava, Slovakia
| | - Tibor Hianik
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48, Bratislava, Slovakia
| | - Jean Pierre Majoral
- Laboratoire de Chimie de Coordination du CNRS (LCC), 205 Route de Narbonne, 31077, Toulouse Cedex 4, France
| | - Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236, Lodz, Poland.
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236, Lodz, Poland
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Alogna A, Gentili V, Trapella C, Hallan SS, Sguizzato M, Strazzabosco G, Fernández M, Cortesi R, Rizzo R, Bortolotti D. Design of Liposomes Carrying HelixComplex Snail Mucus: Preliminary Studies. Molecules 2021; 26:molecules26164709. [PMID: 34443296 PMCID: PMC8399803 DOI: 10.3390/molecules26164709] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 12/12/2022] Open
Abstract
In recent decades liposomes have been used in different field thanks to their ability to act as a vehicle for a wide range of biomolecules, their great versatility and their easy production. The aim of this study was to evaluate liposomes as a vehicle for the actives present in the HelixComplex (HC) snail mucus for topical delivery. Liposomes composed of a mixture of phosphatidylcholine, cholesterol and octadecylamine were prepared with and without HC (empty liposomes) and their biological efficacy was tested by evaluating cell viability and migration. HC-loaded liposomes (LHC) were stable throughout 60 days of observation, and showed interesting effects on wound healing reconstitution. In particular, we observed that 25 µg/mL LHC were already able to induce a higher cell monolayer reconstitution in comparison to the untreated samples and HC treated samples after only 4 h (28% versus 10% and 7%, p = 0.03 and p= 0.003, respectively). The effect was more evident at 24 h in comparison with the untreated control (54% versus 21.2% and 41.6%, p = 0.006 and p = NS, respectively). These results represent a preliminary, but promising, novelty in the delivery strategy of the actives present in the HelixComplex mucus.
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Affiliation(s)
- Andrea Alogna
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Correspondence: (A.A.); (R.C.)
| | - Valentina Gentili
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
| | - Claudio Trapella
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 70 Eliporto Street, I-44121 Ferrara, Italy
| | - Supandeep Singh Hallan
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Biotechnology Interuniversity Consortium (C.I.B.), Ferrara Section, University of Ferrara, I-44121 Ferrara, Italy
| | - Maddalena Sguizzato
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Biotechnology Interuniversity Consortium (C.I.B.), Ferrara Section, University of Ferrara, I-44121 Ferrara, Italy
| | - Giovanni Strazzabosco
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
| | - Mercedes Fernández
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
| | - Rita Cortesi
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Biotechnology Interuniversity Consortium (C.I.B.), Ferrara Section, University of Ferrara, I-44121 Ferrara, Italy
- Correspondence: (A.A.); (R.C.)
| | - Roberta Rizzo
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
- Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 70 Eliporto Street, I-44121 Ferrara, Italy
| | - Daria Bortolotti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, I-44121 Ferrara, Italy; (V.G.); (C.T.); (S.S.H.); (M.S.); (G.S.); (M.F.); (R.R.); (D.B.)
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Rizwanullah M, Perwez A, Mir SR, Alam Rizvi MM, Amin S. Exemestane encapsulated polymer-lipid hybrid nanoparticles for improved efficacy against breast cancer: optimization, in vitrocharacterization and cell culture studies. Nanotechnology 2021; 32:415101. [PMID: 34198267 DOI: 10.1088/1361-6528/ac1098] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Polymer-lipid hybrid nanoparticles (PLHNPs) are novel nanoplatforms for the effective delivery of a lipophilic drug in the management of a variety of solid tumors. The present work was designed to develop exemestane (EXE) encapsulated D-alpha-tocopheryl polyethylene glycol succinate (TPGS) based PLHNPs (EXE-TPGS-PLHNPs) for controlled delivery of EXE for breast cancer management. EXE-TPGS-PLHNPs were formulated by single-step nano-precipitation technique and statistically optimized by a 33Box-Behnken design using Design expert®software. The polycaprolactone (PCL;X1), phospholipon 90 G (PL-90G;X2), and surfactant (X3) were selected as independent factors while particles size (PS;Y1), polydispersity index (PDI;Y2), and %entrapment efficiency (%EE;Y3) were chosen as dependent factors. The average PS, PDI, and %EE of the optimized EXE-TPGS-PLHNPs was observed to be 136.37 ± 3.27 nm, 0.110 ± 0.013, and 88.56 ± 2.15% respectively. The physical state of entrapped EXE was further validated by Fourier-transform infrared spectroscopy, differential scanning calorimetry, and powder x-ray diffraction that revealed complete encapsulation of EXE in the hybrid matrix of PLHNPs with no sign of significant interaction between drug and excipients.In vitrorelease study in simulated gastrointestinal fluids revealed initial fast release for 2 h after that controlled release profile up to 24 h of study. Moreover, optimized EXE-TPGS-PLHNPs exhibited excellent stability in gastrointestinal fluids as well as colloidal stability in different storage concentrations. Furthermore, EXE-TPGS-PLHNPs exhibited distinctively higher cellular uptake and time and dose-dependent cytotoxicity against MCF-7 breast tumor cells compared to EXE-PLHNPs without TPGS and free EXE. The obtained results suggested that EXE-TPGS-PLHNPs can be a promising platform for the controlled delivery of EXE for the effective treatment of breast cancer.
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Affiliation(s)
- Md Rizwanullah
- Formulation Research Lab, Department of Pharmaceutics, School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, New Delhi-110062, India
| | - Ahmad Perwez
- Genome Biology Lab, Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Showkat Rasool Mir
- Phytopharmaceutical Laboratory, Department of Pharmacognosy and Phytochemistry, School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, New Delhi-110062, India
| | - Mohd Moshahid Alam Rizvi
- Genome Biology Lab, Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi-110025, India
| | - Saima Amin
- Formulation Research Lab, Department of Pharmaceutics, School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, New Delhi-110062, India
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Andrade J, González-Martínez C, Chiralt A. Liposomal Encapsulation of Carvacrol to Obtain Active Poly (Vinyl Alcohol) Films. Molecules 2021; 26:molecules26061589. [PMID: 33805693 PMCID: PMC8001182 DOI: 10.3390/molecules26061589] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 12/04/2022] Open
Abstract
Lecithins of different origins and compositions were used for the liposomal encapsulation of carvacrol within the framework of the development of active films for food packaging. Liposomes were incorporated into aqueous polymeric solutions from fully (F) and partially (P) hydrolysed Poly (vinyl alcohol) (PVA) to obtain the films by casting. The particle size distribution and ζ-potential of the liposomal suspensions, as well as their stability over time, were evaluated. Liposomal stability during film formation was analysed through the carvacrol retention in the dried film and the film microstructure. Subtle variations in the size distributions of liposomes from different lecithins were observed. However, the absolute values of the ζ-potential were higher (−52, −57 mV) for soy lecithin (SL) liposomes, followed by those of soy lecithin enriched with phosphatidylcholine (SL-PC) (−43, −50 mV) and sunflower lecithin (SFL) (−33, −38 mV). No significant changes in the liposomal properties were observed during the study period. Lyotropic mesomorphism of lipid associations and carvacrol leakage occurred to differing extents during the film drying step, depending on the membrane lipid composition and surface charge. Liposomes obtained with SL-PC were the most effective at maintaining the stability of carvacrol emulsion during film formation, which led to the greatest carvacrol retention in the films, whereas SFL gave rise to the least stable system and the highest carvacrol losses. P-PVA was less sensitive to the emulsion destabilisation due to its greater bonding capacity with carvacrol. Therefore, P-PVA with carvacrol-loaded SL-PC liposomes has great potential to produce active films for food packaging applications.
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Cai W, Liu J, Zheng L, Xu Z, Chen J, Zhong J, Song Z, Xu X, Chen S, Jiao C, Guo J, Yi Y, Zhang Y. Study on the anti-infection ability of vancomycin cationic liposome combined with polylactide fracture internal fixator. Int J Biol Macromol 2021; 167:834-844. [PMID: 33181211 DOI: 10.1016/j.ijbiomac.2020.11.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/25/2020] [Accepted: 11/06/2020] [Indexed: 02/05/2023]
Abstract
A polylactide composite fracture fixator loaded with vancomycin cationic liposome (PLA@VL) was prepared by reverse evaporation method. The method of cationic liposome encapsulating vancomycin could effectively improve antibacterial property and achieve drug sustained release effect, so as to reduce toxicity of antibiotics in vivo. Scanning electron microscope (SEM) was used to observe morphology and Fourier transform infrared spectroscopy (FTIR) was used to detect the composition of the internal fixator. In vitro drug release model, in vitro degradation model and body fluid osteogenesis model were designed in this study. On the other hand, the experiments of inhibition zone and MC3T3-E1 osteoblasts in mice were conducted to explore antibacterial property, cell activity and adhesion of the PLA@VL composite internal fixator. Alkaline phosphatase (ALP) staining method and alizarin red assay were used to detect the osteogenic induction ability of the composite internal fixator. Finally, mice fracture models were established to verify osteogenic and anti-infection abilities of the composite internal fixator in vivo. The results showed that MC3T3-E1 cells had better adhesion and proliferation abilities on the PLA@VL composite internal fixator than on the PLA fixator, which indicated that the PLA@VL composite internal fixator possessed excellent osteogenic and anti-infection abilities both in vivo and in vitro. Therefore, the above experiments showed that the fracture internal fixator combined with vancomycin cationic liposome had better biocompatibility, antibacterial ability and osteogenic ability, which provides a promising anti-infection material for the clinical field of fracture.
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Affiliation(s)
- Weibin Cai
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Jiandong Liu
- Department of Anesthesiology, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Liling Zheng
- Department of Cardiothoracic Surgery, Quanzhou First Hospital, Fujian Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou, Fujian 362000, China
| | - Zhiyang Xu
- Department of Cardiothoracic Surgery, The First Hospital of Putian City, Putian, Fujian 351100, China
| | - Jianming Chen
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Jing Zhong
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Zhiming Song
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Xiaoping Xu
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Songlin Chen
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Changjie Jiao
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Junhua Guo
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China
| | - Yunfeng Yi
- Department of Cardiothoracic Surgery, Xiamen University Affiliated Southeast Hospital, Zhangzhou 363000, China.
| | - Yanmei Zhang
- Department of Pharmacology, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong 515041, China.
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9
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Abstract
Membrane proteins (MPs) used to be the most difficult targets for structural biology when X-ray crystallography was the mainstream approach. With the resolution revolution of single-particle electron cryo-microscopy (cryo-EM), rapid progress has been made for structural elucidation of isolated MPs. The next challenge is to preserve the electrochemical gradients and membrane curvature for a comprehensive structural elucidation of MPs that rely on these chemical and physical properties for their biological functions. Toward this goal, here we present a convenient workflow for cryo-EM structural analysis of MPs embedded in liposomes, using the well-characterized AcrB as a prototype. Combining optimized proteoliposome isolation, cryo-sample preparation on graphene grids, and an efficient particle selection strategy, the three-dimensional (3D) reconstruction of AcrB embedded in liposomes was obtained at 3.9 Å resolution. The conformation of the homotrimeric AcrB remains the same when the surrounding membranes display different curvatures. Our approach, which can be widely applied to cryo-EM analysis of MPs with distinctive soluble domains, lays out the foundation for cryo-EM analysis of integral or peripheral MPs whose functions are affected by transmembrane electrochemical gradients or/and membrane curvatures.
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Affiliation(s)
- Xia Yao
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544
| | - Xiao Fan
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544
| | - Nieng Yan
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544
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10
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Moser von Filseck J, Barberi L, Talledge N, Johnson IE, Frost A, Lenz M, Roux A. Anisotropic ESCRT-III architecture governs helical membrane tube formation. Nat Commun 2020; 11:1516. [PMID: 32471995 PMCID: PMC7260168 DOI: 10.1038/s41467-020-15327-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 02/27/2020] [Indexed: 02/07/2023] Open
Abstract
ESCRT-III proteins assemble into ubiquitous membrane-remodeling polymers during many cellular processes. Here we describe the structure of helical membrane tubes that are scaffolded by bundled ESCRT-III filaments. Cryo-ET reveals how the shape of the helical membrane tube arises from the assembly of two distinct bundles of helical filaments that have the same helical path but bind the membrane with different interfaces. Higher-resolution cryo-EM of filaments bound to helical bicelles confirms that ESCRT-III filaments can interact with the membrane through a previously undescribed interface. Mathematical modeling demonstrates that the interface described above is key to the mechanical stability of helical membrane tubes and helps infer the rigidity of the described protein filaments. Altogether, our results suggest that the interactions between ESCRT-III filaments and the membrane could proceed through multiple interfaces, to provide assembly on membranes with various shapes, or adapt the orientation of the filaments towards the membrane during membrane remodeling.
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Affiliation(s)
| | - Luca Barberi
- LPTMS, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, France.
- Biochemistry Department, University of Geneva, 1211, Geneva, Switzerland.
| | - Nathaniel Talledge
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA
- California Institute for Quantitative Biosciences, San Francisco, CA, 94158, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, 841112, USA
- Institute for Molecular Virology, University of Minnesota-Twin Cities, Minneapolis, MN, 55455, USA
| | - Isabel E Johnson
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA
- California Institute for Quantitative Biosciences, San Francisco, CA, 94158, USA
| | - Adam Frost
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, 94158, USA
- California Institute for Quantitative Biosciences, San Francisco, CA, 94158, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, 841112, USA
- Chan Zuckerberg Biohub, San Francisco, CA, 94158, USA
| | - Martin Lenz
- LPTMS, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
- Laboratoire de Physique et Mécanique des Milieux Hétérogènes, UMR 7636, CNRS, ESPCI Paris, PSL Research University, Université Paris Diderot, Sorbonne Université, 75005, Paris, France
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, 1211, Geneva, Switzerland.
- Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, 1211, Switzerland.
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11
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Abstract
Cation-chloride-cotransporters (CCCs) catalyze transport of Cl- with K+ and/or Na+across cellular membranes. CCCs play roles in cellular volume regulation, neural development and function, audition, regulation of blood pressure, and renal function. CCCs are targets of clinically important drugs including loop diuretics and their disruption has been implicated in pathophysiology including epilepsy, hearing loss, and the genetic disorders Andermann, Gitelman, and Bartter syndromes. Here we present the structure of a CCC, the Mus musculus K+-Cl- cotransporter (KCC) KCC4, in lipid nanodiscs determined by cryo-EM. The structure, captured in an inside-open conformation, reveals the architecture of KCCs including an extracellular domain poised to regulate transport activity through an outer gate. We identify binding sites for substrate K+ and Cl- ions, demonstrate the importance of key coordinating residues for transporter activity, and provide a structural explanation for varied substrate specificity and ion transport ratio among CCCs. These results provide mechanistic insight into the function and regulation of a physiologically important transporter family.
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Affiliation(s)
- Michelle S Reid
- Department of Molecular and Cell Biology, University of California BerkeleyBerkeleyUnited States
- Helen Wills Neuroscience Institute, University of California BerkeleyBerkeleyUnited States
| | - David M Kern
- Department of Molecular and Cell Biology, University of California BerkeleyBerkeleyUnited States
- Helen Wills Neuroscience Institute, University of California BerkeleyBerkeleyUnited States
| | - Stephen Graf Brohawn
- Department of Molecular and Cell Biology, University of California BerkeleyBerkeleyUnited States
- Helen Wills Neuroscience Institute, University of California BerkeleyBerkeleyUnited States
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12
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Bleher S, Buck J, Muhl C, Sieber S, Barnert S, Witzigmann D, Huwyler J, Barz M, Süss R. Poly(Sarcosine) Surface Modification Imparts Stealth-Like Properties to Liposomes. Small 2019; 15:e1904716. [PMID: 31722126 DOI: 10.1002/smll.201904716] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/23/2019] [Indexed: 06/10/2023]
Abstract
Circulation lifetime is a crucial parameter for a successful therapy with nanoparticles. Reduction and alteration of opsonization profiles by surface modification of nanoparticles is the main strategy to achieve this objective. In clinical settings, PEGylation is the most relevant strategy to enhance blood circulation, yet it has drawbacks, including hypersensitivity reactions in some patients treated with PEGylated nanoparticles, which fuel the search for alternative strategies. In this work, lipopolysarcosine derivatives (BA-pSar, bisalkyl polysarcosine) with precise chain lengths and low polydispersity indices are synthesized, characterized, and incorporated into the bilayer of preformed liposomes via a post insertion technique. Successful incorporation of BA-pSar can be realized in a clinically relevant liposomal formulation. Furthermore, BA-pSar provides excellent surface charge shielding potential for charged liposomes and renders their surface neutral. Pharmacokinetic investigations in a zebrafish model show enhanced circulation properties and reduction in macrophage recognition, matching the behavior of PEGylated liposomes. Moreover, complement activation, which is a key factor in hypersensitivity reactions caused by PEGylated liposomes, can be reduced by modifying the surface of liposomes with an acetylated BA-pSar derivative. Hence, this study presents an alternative surface modification strategy with similar benefits as the established PEGylation of nanoparticles, but with the potential of reducing its drawbacks.
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Affiliation(s)
- Stefan Bleher
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
| | - Jonas Buck
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Christian Muhl
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, 55128, Mainz, Germany
| | - Sandro Sieber
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Sabine Barnert
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
| | - Dominik Witzigmann
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
- Department of Biochemistry and Molecular Biology, University of British Columbia, Health Sciences Mall, Vancouver, V6T 1Z3, British Columbia, Canada
| | - Jörg Huwyler
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, 4056, Basel, Switzerland
| | - Matthias Barz
- Institute of Organic Chemistry, Johannes Gutenberg University Mainz, 55128, Mainz, Germany
| | - Regine Süss
- Department of Pharmaceutical Technology and Biopharmacy and Freiburger Materialforschungszentrum (FMF), Institute of Pharmaceutical Sciences, Albert Ludwig University of Freiburg, 79104, Freiburg, Germany
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13
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Abstract
PIEZO1 is a mechanosensitive channel that converts applied force into electrical signals. Partial molecular structures show that PIEZO1 is a bowl-shaped trimer with extended arms. Here we use cryo-electron microscopy to show that PIEZO1 adopts different degrees of curvature in lipid vesicles of different sizes. We also use high-speed atomic force microscopy to analyse the deformability of PIEZO1 under force in membranes on a mica surface, and show that PIEZO1 can be flattened reversibly into the membrane plane. By approximating the absolute force applied, we estimate a range of values for the mechanical spring constant of PIEZO1. Both methods of microscopy demonstrate that PIEZO1 can deform its shape towards a planar structure. This deformation could explain how lateral membrane tension can be converted into a conformation-dependent change in free energy to gate the PIEZO1 channel in response to mechanical perturbations.
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Affiliation(s)
- Yi-Chih Lin
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Yusong R Guo
- Laboratory of Molecular Neurobiology and Biophysics, Howard Hughes Medical Institute, TheRockefeller University, New York, NY, USA
| | - Atsushi Miyagi
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Jesper Levring
- Laboratory of Molecular Neurobiology and Biophysics, Howard Hughes Medical Institute, TheRockefeller University, New York, NY, USA
| | - Roderick MacKinnon
- Laboratory of Molecular Neurobiology and Biophysics, Howard Hughes Medical Institute, TheRockefeller University, New York, NY, USA.
| | - Simon Scheuring
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA.
- Department of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA.
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14
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Giulimondi F, Digiacomo L, Pozzi D, Palchetti S, Vulpis E, Capriotti AL, Chiozzi RZ, Laganà A, Amenitsch H, Masuelli L, Peruzzi G, Mahmoudi M, Screpanti I, Zingoni A, Caracciolo G. Interplay of protein corona and immune cells controls blood residency of liposomes. Nat Commun 2019; 10:3686. [PMID: 31417080 PMCID: PMC6695391 DOI: 10.1038/s41467-019-11642-7] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 07/26/2019] [Indexed: 02/02/2023] Open
Abstract
In vivo liposomes, like other types of nanoparticles, acquire a totally new 'biological identity' due to the formation of a biomolecular coating known as the protein corona that depends on and modifies the liposomes' synthetic identity. The liposome-protein corona is a dynamic interface that regulates the interaction of liposomes with the physiological environment. Here we show that the biological identity of liposomes is clearly linked to their sequestration from peripheral blood mononuclear cells (PBMCs) of healthy donors that ultimately leads to removal from the bloodstream. Pre-coating liposomes with an artificial corona made of human plasma proteins drastically reduces capture by circulating leukocytes in whole blood and may be an effective strategy to enable prolonged circulation in vivo. We conclude with a critical assessment of the key concepts of liposome technology that need to be reviewed for its definitive clinical translation.
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Affiliation(s)
- Francesca Giulimondi
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
- Istituto Italiano di Tecnologia, Center for Life Nano Science@Sapienza, Viale Regina Elena 291, 00161, Rome, Italy
| | - Luca Digiacomo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Daniela Pozzi
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Sara Palchetti
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Elisabetta Vulpis
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Anna Laura Capriotti
- Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | | | - Aldo Laganà
- Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Heinz Amenitsch
- Institute of inorganic Chemistry, Graz University of Technology, Stremayerg 6/IV, 8010, Graz, Austria
| | - Laura Masuelli
- Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Giovanna Peruzzi
- Istituto Italiano di Tecnologia, Center for Life Nano Science@Sapienza, Viale Regina Elena 291, 00161, Rome, Italy
| | - Morteza Mahmoudi
- Precision Health Program, Michigan State University, East Lansing, MI, 48823, USA.
| | - Isabella Screpanti
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Alessandra Zingoni
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy
| | - Giulio Caracciolo
- Department of Molecular Medicine, Sapienza University of Rome, Viale Regina Elena 291, 00161, Rome, Italy.
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15
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Kałas W, Wysokińska E, Przybyło M, Langner M, Ulatowska-Jarża A, Biały D, Wawrzyńska M, Zioło E, Gil W, Trzeciak AM, Podbielska H, Kopaczyńska M. Photoactive Liposomal Formulation of PVP-Conjugated Chlorin e6 for Photodynamic Reduction of Atherosclerotic Plaque. Int J Mol Sci 2019; 20:ijms20163852. [PMID: 31394775 PMCID: PMC6721124 DOI: 10.3390/ijms20163852] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/24/2019] [Accepted: 08/03/2019] [Indexed: 12/19/2022] Open
Abstract
Background: Liposomes serve as delivery systems for biologically active compounds. Existing technologies inefficiently encapsulate large hydrophilic macromolecules, such as PVP-conjugated chlorin e6 (Photolon). This photoactive drug has been widely tested for therapeutic applications, including photodynamic reduction of atherosclerotic plaque. Methods: A novel formulation of Photolon was produced using “gel hydration technology”. Its pharmacokinetics was tested in Sus scrofa f. domestica. Its cellular uptake, cytotoxicity, and ability to induce a phototoxic reaction were demonstrated in J774A.1, RAW264.7 macrophages, and vascular smooth muscle (T/G HA-VSMC) as well as in vascular endothelial (HUVEC) cells. Results: Developed liposomes had an average diameter of 124.7 ± 0.6 nm (polydispersity index (PDI) = 0.055) and contained >80% of Photolon). The half-life of formulation in S. scrofa was 20 min with area under the curve (AUC) equal to 14.7. The formulation was noncytotoxic in vitro and was rapidly (10 min) and efficiently accumulated by macrophages, but not T/G HA-VSMC or HUVEC. The accumulated quantity of photosensitizer was sufficient for induction of phototoxicity in J774A.1, but not in T/G HA-VSMC. Conclusions: Due to the excellent physical and pharmacokinetic properties and selectivity for macrophages, the novel liposomal formulation of Photolon is a promising therapeutic candidate for use in arteriosclerosis treatment when targeting macrophages but not accompanying vascular tissue is critical for effective and safe therapy.
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Affiliation(s)
- Wojciech Kałas
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, PAS, R. Weigla 12, 53-114 Wrocław, Poland.
| | - Edyta Wysokińska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, PAS, R. Weigla 12, 53-114 Wrocław, Poland
| | - Magdalena Przybyło
- Department of Biomedical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
| | - Marek Langner
- Department of Biomedical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
| | - Agnieszka Ulatowska-Jarża
- Department of Biomedical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
| | - Dariusz Biały
- Department and Clinic of Cardiology, Borowska 213, 50-556 Wrocław, Poland
| | - Magdalena Wawrzyńska
- Department of Emergency Medical Service, Wroclaw Medical University, Parkowa 34, 51-616 Wrocław, Poland
| | - Ewa Zioło
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, PAS, R. Weigla 12, 53-114 Wrocław, Poland
| | - Wojciech Gil
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie St., 50-383 Wrocław, Poland
| | - Anna M Trzeciak
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie St., 50-383 Wrocław, Poland
| | - Halina Podbielska
- Department of Biomedical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
| | - Marta Kopaczyńska
- Department of Biomedical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
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16
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Al Harthi S, Alavi SE, Radwan MA, El Khatib MM, AlSarra IA. Nasal delivery of donepezil HCl-loaded hydrogels for the treatment of Alzheimer's disease. Sci Rep 2019; 9:9563. [PMID: 31266990 PMCID: PMC6606601 DOI: 10.1038/s41598-019-46032-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/17/2019] [Indexed: 11/29/2022] Open
Abstract
This study aims to prepare, characterize and evaluate the pharmacokinetics of liposomal donepezil HCl (LDH) dispersed into thiolated chitosan hydrogel (TCH) in rabbits. Various hydrogels including TCH were prepared, and after characterization, TCH was selected for subsequent evaluations, due to the promising results. TCH was then incorporated with LDH prepared by reverse phase evaporation method. The hydrogel was characterized using scanning electron microscope, dialysis membrane technique, and ultra-performance liquid chromatography methods. The optimized resultant was then evaluated in terms of pharmacokinetics in an in vivo environment. The mean size of LDH and drug entrapment efficiency were 438.7 ± 28.3 nm and 62.5% ± 0.6, respectively. The controlled drug release pattern results showed that the half-life of the loaded drug was approximately 3.5 h. Liposomal hydrogel and free liposomes were more stable at 4 °C compared to those in 20 °C. The pharmacokinetics study in the rabbit showed that the optimized hydrogel increased the mean peak drug concentration and area under the curve by 46% and 39%, respectively, through nasal route compared to the oral tablets of DH. Moreover, intranasal delivery of DH through liposomal hydrogel increased the mean brain content of the drug by 107% compared to the oral DH tablets. The results suggested that liposomes dispersed into TCH is a promising device for the nasal delivery of DH and can be considered for the treatment of Alzheimer's disease.
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Affiliation(s)
- Sitah Al Harthi
- Department of Pharmaceutical Science, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Pharmaceutical Science, College of Pharmacy, Shaqra University, Riyadh, Saudi Arabia
- School of Pharmacy, The University of Queensland, Woolloongabba, 4102, Australia
| | - Seyed Ebrahim Alavi
- School of Pharmacy, The University of Queensland, Woolloongabba, 4102, Australia
| | - Mahasen Ali Radwan
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Egyptian Russian University, Bader City, Egypt
| | - Mona Mohamed El Khatib
- Department of Pharmaceutics, Faculty of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
- Department of Pharmaceutics, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Ibrahim Abdullah AlSarra
- Department of Pharmaceutical Science, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
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17
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Peng W, de Souza Santos M, Li Y, Tomchick DR, Orth K. High-resolution cryo-EM structures of the E. coli hemolysin ClyA oligomers. PLoS One 2019; 14:e0213423. [PMID: 31048915 PMCID: PMC6497250 DOI: 10.1371/journal.pone.0213423] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 04/08/2019] [Indexed: 11/29/2022] Open
Abstract
Pore-forming proteins (PFPs) represent a functionally important protein family, that are found in organisms from viruses to humans. As a major branch of PFPs, bacteria pore-forming toxins (PFTs) permeabilize membranes and usually cause the death of target cells. E. coli hemolysin ClyA is the first member with the pore complex structure solved among α-PFTs, employing α-helices as transmembrane elements. ClyA is proposed to form pores composed of various numbers of protomers. With high-resolution cryo-EM structures, we observe that ClyA pore complexes can exist as newly confirmed oligomers of a tridecamer and a tetradecamer, at estimated resolutions of 3.2 Å and 4.3 Å, respectively. The 2.8 Å cryo-EM structure of a dodecamer dramatically improves the existing structural model. Structural analysis indicates that protomers from distinct oligomers resemble each other and neighboring protomers adopt a conserved interaction mode. We also show a stabilized intermediate state of ClyA during the transition process from soluble monomers to pore complexes. Unexpectedly, even without the formation of mature pore complexes, ClyA can permeabilize membranes and allow leakage of particles less than ~400 Daltons. In addition, we are the first to show that ClyA forms pore complexes in the presence of cholesterol within artificial liposomes. These findings provide new mechanistic insights into the dynamic process of pore assembly for the prototypical α-PFT ClyA.
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Affiliation(s)
- Wei Peng
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Marcela de Souza Santos
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Yang Li
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Diana R Tomchick
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
| | - Kim Orth
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States of America
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18
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Luo G, Yang Q, Yao B, Tian Y, Hou R, Shao A, Li M, Feng Z, Wang W. Slp-coated liposomes for drug delivery and biomedical applications: potential and challenges. Int J Nanomedicine 2019; 14:1359-1383. [PMID: 30863066 PMCID: PMC6388732 DOI: 10.2147/ijn.s189935] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Slp forms a crystalline array of proteins on the outermost envelope of bacteria and archaea with a molecular weight of 40-200 kDa. Slp can self-assemble on the surface of liposomes in a proper environment via electrostatic interactions, which could be employed to functionalize liposomes by forming Slp-coated liposomes for various applications. Among the molecular characteristics, the stability, adhesion, and immobilization of biomacromolecules are regarded as the most meaningful. Compared to plain liposomes, Slp-coated liposomes show excellent physicochemical and biological stabilities. Recently, Slp-coated liposomes were shown to specifically adhere to the gastrointestinal tract, which was attributed to the "ligand-receptor interaction" effect. Furthermore, Slp as a "bridge" can immobilize functional biomacromol-ecules on the surface of liposomes via protein fusion technology or intermolecular forces, endowing liposomes with beneficial functions. In view of these favorable features, Slp-coated liposomes are highly likely to be an ideal platform for drug delivery and biomedical uses. This review aims to provide a general framework for the structure and characteristics of Slp and the interactions between Slp and liposomes, to highlight the unique properties and drug delivery as well as the biomedical applications of the Slp-coated liposomes, and to discuss the ongoing challenges and perspectives.
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Affiliation(s)
- Gan Luo
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qingliang Yang
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Bingpeng Yao
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
- Department of Green Pharmaceutics, Jianxing Honors College, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Yangfan Tian
- Department of Pediatric Surgery, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ruixia Hou
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Anna Shao
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Mengting Li
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Zilin Feng
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Wenxi Wang
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
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19
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Yoshino T, Miyazaki J, Kojima T, Kandori S, Shiga M, Kawahara T, Kimura T, Naka T, Kiyohara H, Watanabe M, Yamasaki S, Akaza H, Yano I, Nishiyama H. Cationized liposomal keto-mycolic acids isolated from Mycobacterium bovis bacillus Calmette-Guérin induce antitumor immunity in a syngeneic murine bladder cancer model. PLoS One 2019; 14:e0209196. [PMID: 30608942 PMCID: PMC6319727 DOI: 10.1371/journal.pone.0209196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 11/30/2018] [Indexed: 01/18/2023] Open
Abstract
Intravesical therapy using Mycobacterium bovis bacillus Calmette-Guérin (BCG) is the most established cancer immunotherapy for bladder cancer. However, its underlying mechanisms are unknown. Mycolic acid (MA), the most abundant lipid of the BCG cell wall, is suspected to be one of the essential active components of this immunogenicity. Here, we developed cationic liposomes incorporating three subclasses (α, keto, and methoxy) of MA purified separately from BCG, using the dendron-bearing lipid D22. The cationic liposomes using D22 were efficiently taken up by the murine bladder cancer cell line MB49 in vitro, but the non-cationic liposomes were not. Lip-kMA, a cationic liposome containing keto-MA, presented strong antitumor activity in two murine syngeneic graft models using the murine bladder cancer cell lines MB49 and MBT-2 in comparison to both Lip-aMA and Lip-mMA, which contained α-MA and methoxy-MA, respectively. Interestingly, Lip-kMA(D12), which was made of D12 instead of D22, did not exhibit antitumor activity in the murine syngeneic graft model using MB49 cells, although it was successfully taken up by MB49 cells in vitro. Histologically, compared to the number of infiltrating CD4 lymphocytes, the number of CD8 lymphocytes was higher in the tumors treated with Lip-kMA. Antitumor effects of Lip-kMA were not observed in nude mice, whereas weak but significant effects were observed in beige mice with natural killer activity deficiency. Thus, a cationized liposome containing keto-MA derived from BCG induced in vivo antitumor immunity. These findings will provide new insights into lipid immunogenicity and the underlying mechanisms of BCG immunotherapy.
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Affiliation(s)
- Takayuki Yoshino
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Jun Miyazaki
- Department of Urology, International University of Health and Welfare, Chiba, Japan
- * E-mail:
| | - Takahiro Kojima
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Shuya Kandori
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Masanobu Shiga
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takashi Kawahara
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Tomokazu Kimura
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takashi Naka
- Department of Food and Nutrition, Faculty of Contemporary Human Life Science, Tezukayama University, Nara, Japan
| | | | - Miyuki Watanabe
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
- Department of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Osaka, Japan
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Hideyuki Akaza
- Strategic Investigation on Comprehensive Cancer Network, University of Tokyo, Tokyo, Japan
| | | | - Hiroyuki Nishiyama
- Department of Urology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
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20
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Jesaitis AJ, Riesselman M, Taylor RM, Brumfield S. Enhanced Immunoaffinity Purification of Human Neutrophil Flavocytochrome B for Structure Determination by Electron Microscopy. Methods Mol Biol 2019; 1982:39-59. [PMID: 31172465 DOI: 10.1007/978-1-4939-9424-3_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Determination of the structure of human neutrophil (PMN) flavocytochrome b (Cytb) is a necessary step for the understanding of the structure-function essentials of NADPH oxidase activity. This understanding is crucial for structure-driven therapeutic approaches addressing control of inflammation and infection. Our work on purification and sample preparation of Cytb has facilitated progress toward the goal of structure determination. Here we describe exploiting immunoaffinity purification of Cytb for initial examination of its size and shape by a combination of classical and cryoelectron microscopic (EM) methods. For these evaluations, we used conventional negative-stain transmission electron microscopy (TEM) to examine both detergent-solubilized Cytb as single particles and Cytb in phosphatidylcholine reconstituted membrane vesicles as densely packed random, partially ordered, and subcrystalline arrays. In preliminary trials, we also examined single particles by cryoelectron microscopy (cryoEM) methods. We conclude that Cytb in detergent and reconstituted in membrane is a relatively compact, symmetrical protein of about 100 Å in maximum dimension. The negative stain, preliminary cryoEM, and crude molecular models suggest that the protein is probably a heterotetramer of two p22phox and gp91phox subunits in both detergent micelles and membrane vesicles. This exploratory study also suggests that high-resolution 2D electron microscopic approaches may be accessible to human material collected from single donors.
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Affiliation(s)
- Algirdas J Jesaitis
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA.
| | - Marcia Riesselman
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA
| | - Ross M Taylor
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA
- Universal Cells , Seattle, WA, USA
| | - Susan Brumfield
- Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT, USA
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21
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Millard M, Yakavets I, Piffoux M, Brun A, Gazeau F, Guigner JM, Jasniewski J, Lassalle HP, Wilhelm C, Bezdetnaya L. mTHPC-loaded extracellular vesicles outperform liposomal and free mTHPC formulations by an increased stability, drug delivery efficiency and cytotoxic effect in tridimensional model of tumors. Drug Deliv 2018; 25:1790-1801. [PMID: 30785308 PMCID: PMC6292368 DOI: 10.1080/10717544.2018.1513609] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 08/09/2018] [Accepted: 08/15/2018] [Indexed: 12/13/2022] Open
Abstract
Efficient photodynamic therapy with meta-tetra(hydroxyphenyl)chlorine requires the application of specific nanoformulations. mTHPC liposomal formulation (Foslip®) demonstrated favorable pharmacokinetics properties. However, rapid liposomes destruction in circulation and rapid mTHPC release impedes Foslip® applications. Alternatively, mTHPC nanovectorization using extracellular vesicles (EVs) could be an attractive option. EVs are naturally secreted by the organism to play a role in intercellular communication due to the capacity to transport proteins and nucleic acids. EVs also possess a natural ability to deliver therapeutic molecules into cancer cells. The aim of the present study was to evaluate photophysical and photobiological properties of mTHPC loaded in endothelial EVs as nanocarriers. We also studied efficiency of nanovectorisation on mTHPC distribution and PDT activity in multicellular tumor spheroids (MCTSs). MCTS is a nonvascularized in vitro 3D model of cells that mimics a similar microenvironment to in vivo situation. mTHPC-EVs were characterized by means of spectroscopic techniques, flow cytometry and nanoparticle tracking analysis. Compared with Foslip®, mTHPC-EVs are stable in murine plasma. Better mTHPC accumulation and penetration (up to 100 µm) in MCTS was observed for mTHPC-EVs compared with liposomal mTHPC. These factors could explain enhanced photodynamic activity of mTHPC-EVs compared with free and liposomal mTHPC. The light dose inducing 50% of cell death with mTHPC-EVs was 4 and 2.5-times lower than that of free and liposomal mTHPC. The obtained results demonstrate that EVs should be considered as perspective nanocarriers for mTHPC-mediated PDT.
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Affiliation(s)
- Marie Millard
- CRAN, CNRS UMR 7039, Université de Lorraine, Nancy, France
- Research Department, Institut de Cancérologie de Lorraine, Université de Lorraine, Nancy, France
| | - Ilya Yakavets
- CRAN, CNRS UMR 7039, Université de Lorraine, Nancy, France
- Research Department, Institut de Cancérologie de Lorraine, Université de Lorraine, Nancy, France
- Laboratory of Biophysics and Biotechnology, Belarusian State University, Minsk, Belarus
| | - Max Piffoux
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris-Diderot, Paris, France
| | - Amanda Brun
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris-Diderot, Paris, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris-Diderot, Paris, France
| | | | | | - Henri-Pierre Lassalle
- CRAN, CNRS UMR 7039, Université de Lorraine, Nancy, France
- Research Department, Institut de Cancérologie de Lorraine, Université de Lorraine, Nancy, France
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris-Diderot, Paris, France
| | - Lina Bezdetnaya
- CRAN, CNRS UMR 7039, Université de Lorraine, Nancy, France
- Research Department, Institut de Cancérologie de Lorraine, Université de Lorraine, Nancy, France
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Abstract
Membrane fission, which divides membrane surfaces into separate compartments, is essential to diverse cellular processes including membrane trafficking and cell division. Quantitative assays are needed to elucidate the physical mechanisms by which proteins drive membrane fission. Toward this goal, several experimental tools have been developed, including visualizing fission products using electron microscopy, measuring membrane shedding from a lipid reservoir, and observing fission of individual membrane tubes pulled from giant vesicles. However, no existing assay of membrane fission provides a quantitative, high-throughput measure of the distribution of vesicle curvatures generated by fission-driving proteins. Toward addressing this challenge, here we describe a novel approach that uses confocal fluorescence imaging to quantify the diameter distribution of membrane vesicles that have been tethered to a coverslip surface following exposure to fission-driving proteins. We employ this assay to measure the progressive appearance of high curvature fission products upon exposure of vesicles to increasing protein concentration. Results from this approach are in quantitative agreement with measurements from electron microscopy, but can be collected with considerably greater throughput, enabling examination of a broad range of experimental conditions. Using the tethered vesicle approach, we have recently found that membrane-bound intrinsically disordered proteins are surprisingly potent drivers of membrane fission. The capacity to drive fission arises from steric pressure generated when disordered domains with large hydrodynamic radii bind to membranes at high local densities. More broadly, the experimental tools described here have the potential to improve our mechanistic understanding of membrane fission in diverse biophysical contexts.
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Affiliation(s)
- Wilton T Snead
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Jeanne C Stachowiak
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States; Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, United States.
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Casadó A, Sagristá ML, Mora M. A novel microfluidic liposomal formulation for the delivery of the SN-38 camptothecin: characterization and in vitro assessment of its cytotoxic effect on two tumor cell lines. Int J Nanomedicine 2018; 13:5301-5320. [PMID: 30254436 PMCID: PMC6141119 DOI: 10.2147/ijn.s166219] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
PURPOSE Irinotecan (CPT-11) and SN-38 - its active metabolite - are alkaloid-derived topoisomerase I interactive compounds widely used in various cancer therapy protocols. To solve the problems associated with the instability of their lactone ring at physiological pH and with the extreme insolubility of SN-38, the development of delivery carriers (eg, liposomes) has been considered a subject of unquestionable medical interest. This article focuses on the development of an alternative protocol to the classical lipid-film hydration procedures to obtain a pharmaceutical formulation for SN-38. METHODS SN-38-loaded liposomes (SN-38lip) were produced by microemulsification, without a prior lipid-film preparation step, and characterized by different methods. Formulation parameters were determined by photon correlation spectroscopy, and the SN-38 entrapment efficiency was evaluated by absorbance spectroscopy. SN-38lip was obtained as a dry, white powder by lyophilization. MTT and LDH assays were conducted to assess the cytotoxic effect of SN-38, both in liposomal (SN-38lip) and solubilized form (SN-38sol); flow cytometry was used to quantify SN-38 uptake and to analyze cell-cycle phase distribution after drug exposure. RESULTS Microfluidic, stable, and controlled sized, negatively charged liposomes, with high SN-38 incorporation efficiency into egg yolk phosphatidylcholine (EPC)/L-α-dioleoyl-phospathidylserine (DOPS) (9:1) vesicles (SN-38lip), were prepared. A lyophilized powder of SN-38lip, easily reconstitutable while retaining physicochemical parameters, was finally obtained. The efficacy of SN-38lip was assessed by in vitro studies with two tumor cell lines (HeLa and Caco-2) and compared with that of SN-38sol. It demonstrated the highest uptake of SN-38lip, in accordance with its highest cytotoxicity effect, in comparison with that of SN-38sol. In addition, different cell-cycle alterations were induced in both cell lines by the liposomal formulation. CONCLUSION The results highlight the potential usefulness of the procured SN-38 liposomal formulation and provide the basis for conducting in vivo studies that allow the development of alternative strategies for colorectal cancer treatment.
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Affiliation(s)
- Ana Casadó
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Barcelona, Spain,
- Communication and CSR Department, Hospital Clinic of Barcelona, Barcelona, Spain
| | - M Lluïsa Sagristá
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Barcelona, Spain,
| | - Margarita Mora
- Department of Biochemistry and Molecular Biomedicine, Faculty of Biology, University of Barcelona, Barcelona, Spain,
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24
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Zhang M, Zhai X, Li J, Albers JJ, Vuletic S, Ren G. Structural basis of the lipid transfer mechanism of phospholipid transfer protein (PLTP). Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:1082-1094. [PMID: 29883800 PMCID: PMC6114099 DOI: 10.1016/j.bbalip.2018.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 05/10/2018] [Accepted: 06/01/2018] [Indexed: 12/14/2022]
Abstract
Human phospholipid transfer protein (PLTP) mediates the transfer of phospholipids among atheroprotective high-density lipoproteins (HDL) and atherogenic low-density lipoproteins (LDL) by an unknown mechanism. Delineating this mechanism would represent the first step towards understanding PLTP-mediated lipid transfers, which may be important for treating lipoprotein abnormalities and cardiovascular disease. Here, using various electron microscopy techniques, PLTP is revealed to have a banana-shaped structure similar to cholesteryl ester transfer protein (CETP). We provide evidence that PLTP penetrates into the HDL and LDL surfaces, respectively, and then forms a ternary complex with HDL and LDL. Insights into the interaction of PLTP with lipoproteins at the molecular level provide a basis to understand the PLTP-dependent lipid transfer mechanisms for dyslipidemia treatment.
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Affiliation(s)
- Meng Zhang
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Xiaobo Zhai
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
| | - Jinping Li
- Department of Biomedical Science, Mercer University School of Medicine, Savannah, GA 31404, United States
| | - John J Albers
- Northwest Lipid Metabolism and Diabetes Research Laboratories, Seattle, WA 98109, United States
| | - Simona Vuletic
- Northwest Lipid Metabolism and Diabetes Research Laboratories, Seattle, WA 98109, United States.
| | - Gang Ren
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States.
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25
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Pucadyil TJ. A novel fluorescence microscopic approach to quantitatively analyse protein-induced membrane remodelling. J Biosci 2018; 43:431-435. [PMID: 30002262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Membrane remodelling or the bending and rupture of the lipid bilayer occurs during diverse cellular processes such as cell division, synaptic transmission, vesicular transport, organelle biogenesis and sporulation. These activities are brought about by the localized change in membrane curvature, which in turn causes lipid-packing stress, of a planar lipid bilayer by proteins. For instance, vesicular transport processes are typically characterized by the cooperative recruitment of proteins that induce budding of a planar membrane and catalyse fission of the necks of membrane buds to release vesicles. The analysis of such membrane remodelling reactions has traditionally been restricted to electron microscopy-based approaches or force spectroscopic analysis of membrane tethers pulled from liposome-based model membrane systems. Our recent work has demonstrated the facile creation of tubular model membrane systems of supported membrane tubes (SMrTs), which mimic late-stage intermediates of typical vesicular transport reactions. This review addresses the nature of such an assay system and a fluorescence-intensity-based analysis of changes in tube dimensions that is indicative of the membrane remodelling capacity of proteins.
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Affiliation(s)
- Thomas J Pucadyil
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India,
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26
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Deshpande S, Spoelstra WK, van Doorn M, Kerssemakers J, Dekker C. Mechanical Division of Cell-Sized Liposomes. ACS Nano 2018; 12:2560-2568. [PMID: 29455527 PMCID: PMC5876618 DOI: 10.1021/acsnano.7b08411] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 02/18/2018] [Indexed: 05/19/2023]
Abstract
Liposomes, self-assembled vesicles with a lipid-bilayer boundary similar to cell membranes, are extensively used in both fundamental and applied sciences. Manipulation of their physical properties, such as growth and division, may significantly expand their use as model systems in cellular and synthetic biology. Several approaches have been explored to controllably divide liposomes, such as shape transformation through temperature cycling, incorporation of additional lipids, and the encapsulation of protein division machinery. However, so far, these methods lacked control, exhibited low efficiency, and yielded asymmetric division in terms of volume or lipid composition. Here, we present a microfluidics-based strategy to realize mechanical division of cell-sized (∼6 μm) liposomes. We use octanol-assisted liposome assembly (OLA) to produce liposomes on chip, which are subsequently flowed against the sharp edge of a wedge-shaped splitter. Upon encountering such a Y-shaped bifurcation, the liposomes are deformed and, remarkably, are able to divide into two stable daughter liposomes in just a few milliseconds. The probability of successful division is found to critically depend on the surface area-to-volume ratio of the mother liposome, which can be tuned through osmotic pressure, and to strongly correlate to the mother liposome size for given microchannel dimensions. The division process is highly symmetric (∼3% size variation between the daughter liposomes) and is accompanied by a low leakage. This mechanical division of liposomes may constitute a valuable step to establish a growth-division cycle of synthetic cells.
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27
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Abu Hashim II, Abo El-Magd NF, El-Sheakh AR, Hamed MF, Abd El-Gawad AEGH. Pivotal role of Acitretin nanovesicular gel for effective treatment of psoriasis: ex vivo-in vivo evaluation study. Int J Nanomedicine 2018; 13:1059-1079. [PMID: 29503541 PMCID: PMC5824759 DOI: 10.2147/ijn.s156412] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The goal of the current study was to explore the potential benefits of Acitretin (Act) nanovesicular gel as a prospective antipsoriatic topical delivery system counteracting the drug challenges in terms of its extremely low aqueous solubility, instability, skin irritation, and serious systemic adverse effects. Act-loaded niosomes were successfully developed, entirely characterized, and optimized. Further evaluation of the optimized formula was conducted regarding its stability and ex vivo cytotoxicity on different cell lines. The optimized niosomal vesicles were then incorporated in gel base matrix and investigated by sequential ex vivo (skin permeation and deposition) and in vivo (skin irritation and antipsoriatic activity using mouse tail model) experiments. The optimized Act-loaded niosomes (span 60:cholesterol molar ratio 1:1) were spherical in shape and exhibited the highest entrapment efficiency (90.32±3.80%) with appropriate nanosize and zeta potential of 369.73±45.45 nm and -36.33±1.80 mV, respectively. Encapsulation of the drug in the nanovesicles was further emphasized by differential scanning calorimetric and powder X-ray diffraction studies. After 3 months storage at 4±1°C, the optimized formula preserved its stability. Act nano niosomal gel produced a remarkable enhanced ex vivo permeation profile up to 30 h and significant drug deposition in the viable epidermal-dermal layers compared with those of Act gel. The pronounced antipsoriatic activity of the medicated nano niosomes was proved ex vivo in HaCaT cells (a keratinocyte cell line). Topical application of Act nano niosomal gel to mouse tail model further established its distinct in vivo antipsoriatic superiority in terms of significantly higher orthokeratosis, drug activity, and reduction in epidermal thickness compared with the control and other gel formulations. Also, negligible skin irritation and better skin tolerability of Act nanovesicular gel were revealed by primary irritation index and histopathologic examination.
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Affiliation(s)
| | | | - Ahmed Ramadan El-Sheakh
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Mohammed Fawzy Hamed
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
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Rahnfeld L, Thamm J, Steiniger F, van Hoogevest P, Luciani P. Study on the in situ aggregation of liposomes with negatively charged phospholipids for use as injectable depot formulation. Colloids Surf B Biointerfaces 2018; 168:10-17. [PMID: 29478769 DOI: 10.1016/j.colsurfb.2018.02.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/06/2018] [Accepted: 02/11/2018] [Indexed: 01/09/2023]
Abstract
Compared to conventional parenteral formulations injectable depot formulations, owing to a sustained drug release, offer several advantages, such as a reduced dosing frequency - and consequent improved compliance - or a predictable release profile. Additionally, fluctuations in the drug blood level may be smoothened and consequently side effects reduced. Because of their capability to encapsulate water soluble drugs and their very low toxicity profile liposomes comprising phospholipids, most certainly represent a vehicle of choice for subcutaneous (s.c.) or intramuscular (i.m.) administration typical for depot injections too. In the past, especially liposomes containing negatively charged phosphatidylserines were investigated regarding their aggregation and fusion behavior upon addition of calcium ions. Liposomes need to have a large size to prevent fast removal from the s.c. or i.m. injection site to make them useful as depot vehicle. In order to obtain such large liposomes, aggregation of smaller liposomes may be considered. Aim of the present study was to induce and investigate controlled aggregation of vesicles containing other negatively charged phospholipids besides phosphatidylserines upon mixing with a solution of divalent cations. L-α-phosphatidylcholine from egg (EPC) liposomes formulated with 25 mol% of 1,2-dipalmitoyl-sn-glycero-3-phosphate (DPPA) or 1,2-distearoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DSPG) proved to be possible lipid-based depot candidates due to their strong aggregation induced by calcium and magnesium cations. Different aggregation profiles with both cations could be observed. Morphological investigations of the aggregates showed that individual liposomes remain stable in the aggregates and no fusion occurred. A fluorescence-based fusion assay confirmed these results. Differential scanning calorimetry measurements supported the findings of the diverse aggregation profiles with calcium or magnesium owing to different binding sites of the cations to the lipid molecules.
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Affiliation(s)
- Lisa Rahnfeld
- Department of Pharmaceutical Technology, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstrasse 8, 07743 Jena, Germany
| | - Jana Thamm
- Department of Pharmaceutical Technology, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstrasse 8, 07743 Jena, Germany
| | - Frank Steiniger
- Electron Microscopy Center, University Hospital Jena, Friedrich Schiller University Jena, Ziegelmuehlenweg 1, 07743 Jena, Germany
| | - Peter van Hoogevest
- Phospholipid Research Center, Im Neuenheimer Feld 515, 69120 Heidelberg, Germany
| | - Paola Luciani
- Department of Pharmaceutical Technology, Institute of Pharmacy, Friedrich Schiller University Jena, Lessingstrasse 8, 07743 Jena, Germany.
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29
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Abstract
TEM is an important method for the characterization of size and shape of nanoparticles as it can directly visualize single particles and even their inner architecture. Imaging of metal particles in the electron microscope is quite straightforward due to their high density and stable structure, but the structure of soft material nanoparticles, such as liposomes, needs to be preserved for the electron microscope. The best method to visualize liposomes close to their native structure is cryo-electron microscopy, where thin films of suspensions are plunge frozen to create vitrified ice films that can be imaged directly in the electron microscope under liquid nitrogen temperature. Although subject to artifacts, negative staining TEM can also be a useful method to image liposomes, as it is faster and simpler than cryo-EM, and requires less advanced equipment.
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Affiliation(s)
- Ulrich Baxa
- Cancer Research Technology Program, Electron Microscopy Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA.
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30
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Wang M, Lee RJ, Bi Y, Li L, Yan G, Lu J, Meng Q, Teng L, Xie J. Transferrin-conjugated liposomes loaded with novel dihydroquinoline derivatives as potential anticancer agents. PLoS One 2017; 12:e0186821. [PMID: 29088257 PMCID: PMC5663382 DOI: 10.1371/journal.pone.0186821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/09/2017] [Indexed: 02/04/2023] Open
Abstract
A series of 1,2-dihydroquinoline derivatives were synthesized and evaluated for cytotoxicity in HeLa, Hep G2 and 6HEK-293T cell lines. EEDQ2 was identified as a promising anti-cancer agent with low IC50 in HeLa (18.55μg/ml) and Hep G2 (14.53μg/ml) cells. For improving the antitumor activity and tumor selectivity of EEDQ2, we prepared transferrin (Tf)-modified liposomes (LPs) to deliver EEDQ2. When HeLa and Hep G2 cells were treated with LP-delivered EEDQ2, the ROS level was significantly enhanced, and mitochondrial membrane potential was reversed. Tf-LPs improved cell uptake of EEDQ2 by about 3.7 times compared with non-targeted LPs. These data suggest that Tf-LPs delivering EEDQ2 is a promising strategy to treat cancer.
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Affiliation(s)
- Mengqiao Wang
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Robert J. Lee
- Jilin University, College of Life Science, Changchun, Jilin, China
- Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, Ohio, United States of America
| | - Ye Bi
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Lianlian Li
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Guodong Yan
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Jiahui Lu
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Qingfan Meng
- Jilin University, College of Life Science, Changchun, Jilin, China
| | - Lesheng Teng
- Jilin University, College of Life Science, Changchun, Jilin, China
- * E-mail: (LT); (JX)
| | - Jing Xie
- Jilin University, College of Life Science, Changchun, Jilin, China
- * E-mail: (LT); (JX)
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Li Y, Chen Z, Cui Y, Zhai G, Li L. The construction and characterization of hybrid paclitaxel-in-micelle-in-liposome systems for enhanced oral drug delivery. Colloids Surf B Biointerfaces 2017; 160:572-580. [PMID: 29028605 DOI: 10.1016/j.colsurfb.2017.10.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 08/23/2017] [Accepted: 10/04/2017] [Indexed: 12/12/2022]
Abstract
In this study, novel paclitaxel (PTX) loaded hybrid liposomes for oral PTX delivery were prepared through incorporating PTX loaded polyion complex micelles comprised of positively charged Pluronic F127-Polyethylenimine (PF127-PEI) copolymer and negatively charged sodium cholate (CA) into liposomes consisted of phospholipid molecules. According to the results, this kind of PTX-loaded hybrid liposomes showed improved PTX encapsulation efficiency, sustained PTX release, and enhanced PTX absorption in intestine. The mechanism for enhancing absorption was demonstrated in connection with inhibition of the efflux mediated by multidrug resistance protein, intestinal P-gp. In pharmacokinetic study, the absolute oral bioavailability of PTX loaded in hybrid liposomes had reached to 37.91%. All of these results demonstrated that the application of this novel PTX loaded hybrid liposomes is a strategy with great potential for highly effective oral PTX delivery.
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Affiliation(s)
- Yimu Li
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, 250012, China
| | - Zheng Chen
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, 250012, China
| | - Yanan Cui
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, 250012, China
| | - Guangxi Zhai
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, 250012, China; Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, 250012, China.
| | - Lingbing Li
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province, 250012, China; Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong, 250012, China.
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32
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Martín-Saavedra F, Ruiz-Hernández E, Escudero-Duch C, Prieto M, Arruebo M, Sadeghi N, Deckers R, Storm G, Hennink WE, Santamaría J, Vilaboa N. Lipogels responsive to near-infrared light for the triggered release of therapeutic agents. Acta Biomater 2017; 61:54-65. [PMID: 28801266 DOI: 10.1016/j.actbio.2017.08.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/19/2017] [Accepted: 08/07/2017] [Indexed: 11/16/2022]
Abstract
Here we report a composite system based on fibrin hydrogels that incorporate in their structure near-infrared (NIR) responsive nanomaterials and thermosensitive liposomes (TSL). Polymerized fibrin networks entrap simultaneously gold-based nanoparticles (NPs) capable of transducing NIR photon energy into heat, and lysolipid-incorporated TSL (LTSL) loaded with doxorubicin hydrochloride (DOX). NIR irradiation of the resulting hydrogels (referred to as "lipogels") with 808nm laser light increased the temperature of the illuminated areas, leading to the release of the liposomal cargo. Levels of DOX that release from the "smart" composites were dependent on the concentration of NIR nanotransducers loaded in the lipogel, the intensity of the electromagnetic energy deposited and the irradiation regime. Released DOX retained its bioactivity, as shown in cultures of epithelial carcinoma cells. Finally, the developed drug delivery platform was refined by using NIR-photoabsorbers based on copper sulfide NPs to generate completely biodegradable composites as well as through the incorporation of cholesterol (Ch) in LTSL formulation, which lessens leakiness of the liposomal cargo at physiological temperature. This remotely controlled system may suit well for those therapies that require precise control over the dose of delivered drug in a defined spatiotemporal framework. STATEMENT OF SIGNIFICANCE Hydrogels composed of fibrin embedding nanoparticles responsive to near infrared (NIR) energy and thermosensitive liposomes loaded with doxorubicin hydrochloride (DOX), were prepared by in situ polymerization. NIR-light irradiation of these constructs, referred to as "NIR responsive lipogels", results in the controlled release of DOX to the surrounding medium. This technology may use fully degradable components and can preserve the bioactivity of liposomal cargo after remote triggering to finely regulate the dose and bioavailability of delivered payloads. NIR responsive lipogels technology overcomes the limitations of drug release systems based on the combination of liposomes and degradable polymeric materials, which in many cases lead to insufficient release at therapy onset or to overdose during high degradation period.
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Affiliation(s)
- Francisco Martín-Saavedra
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain; University Hospital La Paz-IdiPAZ, Paseo de la Castellana 261, 28046 Madrid, Spain.
| | - Eduardo Ruiz-Hernández
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland; Tissue Engineering Research Group, Dept. of Anatomy, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland; Advanced Materials and Bioengineering Research (AMBER) Centre, CRANN Institute, Trinity College Dublin, Dublin 2, Ireland.
| | - Clara Escudero-Duch
- University Hospital La Paz-IdiPAZ, Paseo de la Castellana 261, 28046 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain.
| | - Martín Prieto
- Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro, Edificio I+D, C/Mariano Esquillor s/n, 50.018 Zaragoza, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain.
| | - Manuel Arruebo
- Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro, Edificio I+D, C/Mariano Esquillor s/n, 50.018 Zaragoza, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain.
| | - Negar Sadeghi
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, PO BOX 80082, 3508 TB Utrecht, The Netherlands.
| | - Roel Deckers
- Imaging Division, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, PO BOX 80082, 3508 TB Utrecht, The Netherlands.
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, PO BOX 80082, 3508 TB Utrecht, The Netherlands.
| | - Jesús Santamaría
- Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro, Edificio I+D, C/Mariano Esquillor s/n, 50.018 Zaragoza, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain.
| | - Nuria Vilaboa
- University Hospital La Paz-IdiPAZ, Paseo de la Castellana 261, 28046 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Spain.
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Chandrawati R, Olesen MTJ, Marini TCC, Bisra G, Guex AG, de Oliveira MG, Zelikin AN, Stevens MM. Enzyme Prodrug Therapy Engineered into Electrospun Fibers with Embedded Liposomes for Controlled, Localized Synthesis of Therapeutics. Adv Healthc Mater 2017; 6:10.1002/adhm.201700385. [PMID: 28699219 PMCID: PMC5590711 DOI: 10.1002/adhm.201700385] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/31/2017] [Indexed: 12/11/2022]
Abstract
Enzyme prodrug therapy (EPT) enables localized conversion of inert prodrugs to active drugs by enzymes. Performance of EPT necessitates that the enzyme remains active throughout the time frame of the envisioned therapeutic application. β-glucuronidase is an enzyme with historically validated performance in EPT, however it retains its activity in biomaterials for an insufficiently long period of time, typically not exceeding 7 d. Herein, the encapsulation of β-glucuronidase in liposomal subcompartments within poly(vinyl alcohol) electrospun fibers is reported, leading to the assembly of biocatalytically active materials with activity of the enzyme sustained over at least seven weeks. It is further shown that liposomes provide the highly beneficial stabilization of the enzyme when incubated in cell culture media. The assembled biocatalytic materials successfully produce antiproliferative drugs (SN-38) using externally administered prodrugs (SN-38-glucuronide) and effectively suppress cell proliferation, with envisioned utility in the design of cardiovascular grafts.
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Affiliation(s)
- Rona Chandrawati
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Morten T. J. Olesen
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Thatiane C. C. Marini
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Gurpal Bisra
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Anne Géraldine Guex
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Marcelo G. de Oliveira
- Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Alexander N. Zelikin
- Department of Chemistry and iNANO Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Molly M. Stevens
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
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Mittendorf KF, Marinko JT, Hampton CM, Ke Z, Hadziselimovic A, Schlebach JP, Law CL, Li J, Wright ER, Sanders CR, Ohi MD. Peripheral myelin protein 22 alters membrane architecture. Sci Adv 2017; 3:e1700220. [PMID: 28695207 PMCID: PMC5498104 DOI: 10.1126/sciadv.1700220] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 05/19/2017] [Indexed: 05/10/2023]
Abstract
Peripheral myelin protein 22 (PMP22) is highly expressed in myelinating Schwann cells of the peripheral nervous system. PMP22 genetic alterations cause the most common forms of Charcot-Marie-Tooth disease (CMTD), which is characterized by severe dysmyelination in the peripheral nerves. However, the functions of PMP22 in Schwann cell membranes remain unclear. We demonstrate that reconstitution of purified PMP22 into lipid vesicles results in the formation of compressed and cylindrically wrapped protein-lipid vesicles that share common organizational traits with compact myelin of peripheral nerves in vivo. The formation of these myelin-like assemblies depends on the lipid-to-PMP22 ratio, as well as on the PMP22 extracellular loops. Formation of the myelin-like assemblies is disrupted by a CMTD-causing mutation. This study provides both a biochemical assay for PMP22 function and evidence that PMP22 directly contributes to membrane organization in compact myelin.
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Affiliation(s)
- Kathleen F. Mittendorf
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
| | - Justin T. Marinko
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
| | - Cheri M. Hampton
- Division of Infectious Disease, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Zunlong Ke
- Division of Infectious Disease, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Arina Hadziselimovic
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
| | - Jonathan P. Schlebach
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
| | - Cheryl L. Law
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
| | - Jun Li
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Elizabeth R. Wright
- Division of Infectious Disease, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Charles R. Sanders
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
- Corresponding author. (M.D.O.); (C.R.S.)
| | - Melanie D. Ohi
- Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
- Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37240, USA
- Corresponding author. (M.D.O.); (C.R.S.)
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35
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González-Gutiérrez J, Pérez-Isidoro R, Pérez-Camacho MI, Ruiz-Suárez JC. The calorimetric properties of liposomes determine the morphology of dried droplets. Colloids Surf B Biointerfaces 2017; 155:215-222. [PMID: 28432955 DOI: 10.1016/j.colsurfb.2017.04.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/06/2017] [Accepted: 04/10/2017] [Indexed: 11/18/2022]
Abstract
The evaporation of liquid droplets deposited on a substrate is a very complex phenomenon. Driven by capillary and Marangoni flows, particle-particle and particle-substrate interactions, the deposits they leave are vestiges of such complexity. We study the formation of patterns during the evaporation of liposome suspension droplets deposited on a hydrophobic substrate at different temperatures. We observed that as we change the temperature of the substrate, a morphological phase transition occurs at a given temperature Tm. This temperature corresponds to the gel-fluid lipid melting transition of the liposome suspension. Optical microscopy and atomic force microscopy are used to study the morphology of the patterns. Based on the radial density profiles we found that all structures can be classified into two groups: patterns composed by nearly uniform deposition (below Tm) and prominent structures containing randomly distributed voids (above Tm).
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Affiliation(s)
| | | | | | - J C Ruiz-Suárez
- CINVESTAV-Monterrey, PIIT, Apodaca, Nuevo León 66600, Mexico.
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36
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Whitehead SA, McNitt CD, Mattern-Schain SI, Carr AJ, Alam S, Popik VV, Best MD. Artificial Membrane Fusion Triggered by Strain-Promoted Alkyne-Azide Cycloaddition. Bioconjug Chem 2017; 28:923-932. [PMID: 28248084 PMCID: PMC5990007 DOI: 10.1021/acs.bioconjchem.6b00578] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Artificial systems for controlled membrane fusion applicable for drug delivery would ideally use triggers that are orthogonal to biology. To apply the strain-promoted alkyne-azide cycloaddition (SPAAC) to drive membrane fusion, oxo-dibenzocyclooctyne (ODIBO)-lipid 1 was designed, synthesized, and studied alongside azadibenzocyclooctyne (ADIBO)-lipids 2-4 to assess fusion with liposomes containing azido-lipid 5. Lipids 1-2 were first shown to be effective for liposome derivatization. Next, fusion was evaluated using liposomes containing 1 and varying ratios of PC and PE via a FRET dilution fusion assay, and a 1:1 PC-to-PE ratio yielded the greatest signal change attributed to fusion. Finally, lipids 1-4 were compared, and 1 yielded the greatest triggering of fusion, while 2-4 yielded varying efficacies depending on the structural features of each lipid. Fusion was further validated through STEM studies showing larger multilamellar assemblies after liposome mixing, and FRET assay results supporting the mixing of liposome aqueous contents. This work provides a platform for triggered fusion toward drug delivery applications and an understanding of the effects of lipid structure and membrane composition on fusion.
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Affiliation(s)
- Stuart A Whitehead
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Christopher D McNitt
- Department of Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Samuel I Mattern-Schain
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Adam J Carr
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Shahrina Alam
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Vladimir V Popik
- Department of Chemistry, The University of Georgia , Athens, Georgia 30602, United States
| | - Michael D Best
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
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37
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Asadi J, Ferguson S, Raja H, Hacker C, Marius P, Ward R, Pliotas C, Naismith J, Lucocq J. Enhanced imaging of lipid rich nanoparticles embedded in methylcellulose films for transmission electron microscopy using mixtures of heavy metals. Micron 2017; 99:40-48. [PMID: 28419915 PMCID: PMC5465805 DOI: 10.1016/j.micron.2017.03.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 03/28/2017] [Accepted: 03/29/2017] [Indexed: 02/01/2023]
Abstract
Uranyl acetate/tungsten double stains are proposed for imaging lipid rich nanoparticle in TEM. Combined with methylcellulose embedment, the technique enhances membrane contrast. The technique works for liposomes, nanodiscs and bicelles. The double staining should improve quantification of lipid rich nanoparticles.
Synthetic and naturally occurring lipid-rich nanoparticles are of wide ranging importance in biomedicine. They include liposomes, bicelles, nanodiscs, exosomes and virus particles. The quantitative study of these particles requires methods for high-resolution visualization of the whole population. One powerful imaging method is cryo-EM of vitrified samples, but this is technically demanding, requires specialized equipment, provides low contrast and does not reveal all particles present in a population. Another approach is classical negative stain-EM, which is more accessible but is difficult to standardize for larger lipidic structures, which are prone to artifacts of structure collapse and contrast variability. A third method uses embedment in methylcellulose films containing uranyl acetate as a contrasting agent. Methylcellulose embedment has been widely used for contrasting and supporting cryosections but only sporadically for visualizing lipid rich vesicular structures such as endosomes and exosomes. Here we present a simple methylcellulose-based method for routine and comprehensive visualization of synthetic lipid rich nanoparticles preparations, such as liposomes, bicelles and nanodiscs. It combines a novel double-staining mixture of uranyl acetate (UA) and tungsten-based electron stains (namely phosphotungstic acid (PTA) or sodium silicotungstate (STA)) with methylcellulose embedment. While the methylcellulose supports the delicate lipid structures during drying, the addition of PTA or STA to UA provides significant enhancement in lipid structure display and contrast as compared to UA alone. This double staining method should aid routine structural evaluation and quantification of lipid rich nanoparticles structures.
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Affiliation(s)
- Jalal Asadi
- School of Medicine, University of St Andrews, St. Andrews, Fife, KY16 9TF, UK
| | - Sophie Ferguson
- School of Medicine, University of St Andrews, St. Andrews, Fife, KY16 9TF, UK
| | - Hussain Raja
- School of Medicine, University of St Andrews, St. Andrews, Fife, KY16 9TF, UK
| | - Christian Hacker
- School of Medicine, University of St Andrews, St. Andrews, Fife, KY16 9TF, UK
| | - Phedra Marius
- Biomedical Sciences Research Complex, North Haugh, University of St. Andrews, St. Andrews, Scotland, UK
| | - Richard Ward
- Biomedical Sciences Research Complex, North Haugh, University of St. Andrews, St. Andrews, Scotland, UK
| | - Christos Pliotas
- Biomedical Sciences Research Complex, North Haugh, University of St. Andrews, St. Andrews, Scotland, UK
| | - James Naismith
- Biomedical Sciences Research Complex, North Haugh, University of St. Andrews, St. Andrews, Scotland, UK
| | - John Lucocq
- School of Medicine, University of St Andrews, St. Andrews, Fife, KY16 9TF, UK.
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Nguyen HT, Thapa RK, Shin BS, Jeong JH, Kim JR, Yong CS, Kim JO. CD9 monoclonal antibody-conjugated PEGylated liposomes for targeted delivery of rapamycin in the treatment of cellular senescence. Nanotechnology 2017; 28:095101. [PMID: 28067204 DOI: 10.1088/1361-6528/aa57b3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Premature cellular senescence refers to the state of irreversible cell cycle arrest due to DNA damage or other stresses. In this study, CD9 monoclonal antibody (CD9mAb) was successfully conjugated to the surface of PEGylated liposomes for targeted delivery of rapamycin (LR-CD9mAb) to overcome senescence of CD9 receptor-overexpressing cells. LR-CD9mAb has a small particle size (143.3 ± 2.4 nm), narrow size distribution (polydispersity index: 0.220 ± 0.036), and negative zeta potential (-14.6 ± 1.2 mV). The uptake of CD9-targeted liposomes by premature senescent human dermal fibroblasts (HDFs) was higher than that by young HDFs, as displayed by confocal microscopic images. The senescence might not be reversed by treatment with rapamycin; however, the drug promoted cell proliferation and reduced the number of cells that expressed the senescence-associated-β-galactosidase (SA-β-gal). These effects were further confirmed by cell viability, cell cycle, and Western blotting analyses. Moreover, CD9-targeted liposomes showed better anti-senescence activity, in comparison with free rapamycin or the conventional liposomal formulation, suggesting the potential application of this system in further in vivo studies.
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Affiliation(s)
- Hanh Thuy Nguyen
- College of Pharmacy, Yeungnam University, 214-1, Dae-dong, Gyeongsan 38541, Republic of Korea
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39
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Cianciaruso C, Phelps EA, Pasquier M, Hamelin R, Demurtas D, Alibashe Ahmed M, Piemonti L, Hirosue S, Swartz MA, De Palma M, Hubbell JA, Baekkeskov S. Primary Human and Rat β-Cells Release the Intracellular Autoantigens GAD65, IA-2, and Proinsulin in Exosomes Together With Cytokine-Induced Enhancers of Immunity. Diabetes 2017; 66:460-473. [PMID: 27872147 DOI: 10.2337/db16-0671] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 10/31/2016] [Indexed: 02/02/2023]
Abstract
The target autoantigens in several organ-specific autoimmune diseases, including type 1 diabetes (T1D), are intracellular membrane proteins, whose initial encounter with the immune system is poorly understood. Here we propose a new model for how these proteins can initiate autoimmunity. We found that rat and human pancreatic islets release the intracellular β-cell autoantigens in human T1D, GAD65, IA-2, and proinsulin in exosomes, which are taken up by and activate dendritic cells. Accordingly, the anchoring of GAD65 to exosome-mimetic liposomes strongly boosted antigen presentation and T-cell activation in the context of the human T1D susceptibility haplotype HLA-DR4. Cytokine-induced endoplasmic reticulum stress enhanced exosome secretion by β-cells; induced exosomal release of the immunostimulatory chaperones calreticulin, Gp96, and ORP150; and increased exosomal stimulation of antigen-presenting cells. We propose that stress-induced exosomal release of intracellular autoantigens and immunostimulatory chaperones may play a role in the initiation of autoimmune responses in T1D.
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Affiliation(s)
- Chiara Cianciaruso
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Graduate Program in Biotechnology and Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Edward A Phelps
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Miriella Pasquier
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Romain Hamelin
- Proteomics Core Facility, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Davide Demurtas
- Bio-Electron Microscopy Core Facility, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Mohamed Alibashe Ahmed
- Cell Isolation and Transplantation Center, Department of Surgery, Geneva University Hospitals and University of Geneva, Geneva, Switzerland
| | - Lorenzo Piemonti
- Diabetes Research Institute, Istituto di Ricovero e Cura a Carattere Scientifico, San Raffaele Scientific Institute, Milan, Italy
| | - Sachiko Hirosue
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Melody A Swartz
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Graduate Program in Biotechnology and Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Institute of Molecular Engineering, University of Chicago, Chicago, IL
| | - Michele De Palma
- Swiss Institute for Experimental Cancer Research, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Jeffrey A Hubbell
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Graduate Program in Biotechnology and Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Institute of Molecular Engineering, University of Chicago, Chicago, IL
| | - Steinunn Baekkeskov
- Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Graduate Program in Biotechnology and Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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40
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Abstract
The article explores the theory of infrared-visible sum frequency generation microscopy of phospholipid envelopes with dimensions larger than the wavelength of the nonlinear emission. The main part of the study concerns derivation and accounting for the contributions of effective nonlinear responses specific to sites on the surfaces of a bilayer envelope and their dependence on polarization condition and experimental geometry. The nonlinear responses of sites are mapped onto the image plane according to their emission directions and the numerical aperture of a sampling microscope objective. According to the simulation results, we discuss possible approaches to characterize the shape of the envelope, to extract molecular hyperpolarizabilities, and to anticipate possible heterogeneity in envelope composition and anisotropy of the environment proximal to the envelope. The modeling approach offers a promising analytic facility to assist connecting microscopy observations in engineered liposomes, cellular envelopes, and subcellular organelles of relatively large dimensions to molecular properties, and hence to chemistry and structure down to available spatial resolution.
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Affiliation(s)
- Victor Volkov
- School of Science and Technology,Interdisciplinary Biomedical Research Center,Nottingham Trent University,Clifton Lane,Nottingham NG11 8NS,UK
| | - Carole C Perry
- School of Science and Technology,Interdisciplinary Biomedical Research Center,Nottingham Trent University,Clifton Lane,Nottingham NG11 8NS,UK
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41
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Abstract
In this paper, we report the lipoplex-mediated deintercalation of anticancer drug doxorubicin (DOX) from the DOX-DNA complex under controlled experimental conditions. We used three zwitterionic liposomes, namely, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and 2-oleoyl-1-palmitoyl-sn-glycero-3-phosphocholine (POPC), which are widely different in their phase transition temperatures to form a lipoplex with calf thymus DNA in the presence of Ca(2+) ions. The study revealed that DPPC being in sol-gel phase was more effective in releasing the drug from the DOX-DNA complex compared with liposomes that remain in liquid crystalline phase (DMPC and POPC). The higher extent of drug release in the case of DPPC liposomes was attributed to the stronger lipoplex formation with DNA as compared with that of other liposomes. Owing to the relatively smaller head group area, the DPPC liposomes in their sol-gel phase can absorb a larger number of Ca(2+) ions and hence offer a strong electrostatic interaction with DNA. This interaction was confirmed by time-resolved anisotropy and circular dichroism spectroscopy. Apart from the electrostatic interaction, the possible hydrophobic interaction between the liposomes and DNA was also taken into account for the observed deintercalation. The successful uptake of drug molecules by liposomes from the drug-DNA complex in the post-release period was also confirmed using confocal laser scanning microscopy (CLSM).
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Affiliation(s)
- Anupam Das
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
| | - Chandan Adhikari
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
| | - Anjan Chakraborty
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
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Ochiuz L, Grigoras C, Popa M, Stoleriu I, Munteanu C, Timofte D, Profire L, Grigoras AG. Alendronate-Loaded Modified Drug Delivery Lipid Particles Intended for Improved Oral and Topical Administration. Molecules 2016; 21:E858. [PMID: 27367664 PMCID: PMC6272979 DOI: 10.3390/molecules21070858] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/24/2016] [Accepted: 06/25/2016] [Indexed: 11/12/2022] Open
Abstract
The present paper focuses on solid lipid particles (SLPs), described in the literature as the most effective lipid drug delivery systems that have been introduced in the last decades, as they actually combine the advantages of polymeric particles, hydrophilic/lipophilic emulsions and liposomes. In the current study, we present our most recent advances in the preparation of alendronate (AL)-loaded SLPs prepared by hot homogenization and ultrasonication using various ratios of a self-emulsifying lipidic mixture of Compritol 888, Gelucire 44/14, and Cremophor A 25. The prepared AL-loaded SLPs were investigated for their physicochemical, morphological and structural characteristics by dynamic light scattering, differential scanning calorimetry, thermogravimetric and powder X-ray diffraction analysis, infrared spectroscopy, optical and scanning electron microscopy. Entrapment efficacy and actual drug content were assessed by a validated HPLC method. In vitro dissolution tests performed in simulated gastro-intestinal fluids and phosphate buffer solution pH 7.4 revealed a prolonged release of AL of 70 h. Additionally, release kinetics analysis showed that both in simulated gastrointestinal fluids and in phosphate buffer solution, AL is released from SLPs based on equal ratios of lipid excipients following zero-order kinetics, which characterizes prolonged-release drug systems.
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Affiliation(s)
- Lacramioara Ochiuz
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy of Iasi, Universitatii Street, 16, Iasi 700115, Romania.
| | - Cristian Grigoras
- Petru Poni Institute of Macromolecular Chemistry, Aleea, Grigore Ghica Voda, 41A, Iasi 700487, Romania.
| | - Marcel Popa
- Department of Natural and Synthetic Polymers, Gheorghe Asachi Technical University of Iasi, Romania, Prof. Dr. Docent Dimitrie Mangeron Avenue, 73, Iasi 700050, Romania.
| | - Iulian Stoleriu
- Faculty of Mathematics, Alexandru I. Cuza University, 11 Bvd. Carol I, Iasi 700506, Romania.
| | - Corneliu Munteanu
- Faculty of Mechanical Engineering, Gheorghe Asachi Technical University of Iasi, Romania, Prof. Dr. Docent Dimitrie Mangeron Avenue, 73, Iasi 700050, Romania.
| | - Daniel Timofte
- Faculty of Medicine, Grigore T.Popa University of Medicine and Pharmacy Iasi, 16 Universitatii Street, Iasi 700115, Romania.
- Surgery Department, Sf. Spiridon Hospital, 1 Piata Independentei, Iasi 700111, Romania.
| | - Lenuta Profire
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy of Iasi, Universitatii Street, 16, Iasi 700115, Romania.
| | - Anca Giorgiana Grigoras
- Petru Poni Institute of Macromolecular Chemistry, Aleea, Grigore Ghica Voda, 41A, Iasi 700487, Romania.
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Kudsiova L, Welser K, Campbell F, Mohammadi A, Dawson N, Cui L, Hailes HC, Lawrence MJ, Tabor AB. Delivery of siRNA using ternary complexes containing branched cationic peptides: the role of peptide sequence, branching and targeting. Mol Biosyst 2016; 12:934-51. [PMID: 26794416 DOI: 10.1039/c5mb00754b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ternary nanocomplexes, composed of bifunctional cationic peptides, lipids and siRNA, as delivery vehicles for siRNA have been investigated. The study is the first to determine the optimal sequence and architecture of the bifunctional cationic peptide used for siRNA packaging and delivery using lipopolyplexes. Specifically three series of cationic peptides of differing sequence, degrees of branching and cell-targeting sequences were co-formulated with siRNA and vesicles prepared from a 1 : 1 molar ratio of the cationic lipid DOTMA and the helper lipid, DOPE. The level of siRNA knockdown achieved in the human alveolar cell line, A549-luc cells, in both reduced serum and in serum supplemented media was evaluated, and the results correlated to the nanocomplex structure (established using a range of physico-chemical tools, namely small angle neutron scattering, transmission electron microscopy, dynamic light scattering and zeta potential measurement); the conformational properties of each component (circular dichroism); the degree of protection of the siRNA in the lipopolyplex (using gel shift assays) and to the cellular uptake, localisation and toxicity of the nanocomplexes (confocal microscopy). Although the size, charge, structure and stability of the various lipopolyplexes were broadly similar, it was clear that lipopolyplexes formulated from branched peptides containing His-Lys sequences perform best as siRNA delivery agents in serum, with protection of the siRNA in serum balanced against efficient release of the siRNA into the cytoplasm of the cell.
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Affiliation(s)
- Laila Kudsiova
- Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, Waterloo Campus, London SE1 9NH, UK
| | - Katharina Welser
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
| | - Frederick Campbell
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
| | - Atefeh Mohammadi
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
| | - Natalie Dawson
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
| | - Lili Cui
- Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, Waterloo Campus, London SE1 9NH, UK
| | - Helen C Hailes
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
| | - M Jayne Lawrence
- Institute of Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, Waterloo Campus, London SE1 9NH, UK
| | - Alethea B Tabor
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20, Gordon Street, London WC1H 0AJ, UK.
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Abstract
Liposomes are nanoscale containers that are typically synthesized from lipids using a high-shear process such as extrusion or sonication. While liposomes are extensively used in drug delivery, they do suffer from certain problems including limited colloidal stability and short circulation times in the body. As an alternative to liposomes, we explore a class of container structures derived from erythrocytes (red blood cells). The procedure involves emptying the inner contents of these cells (specifically hemoglobin) and resuspending the empty structures in buffer, followed by sonication. The resulting structures are termed nanoerythrosomes (NERs), i.e., they are membrane-covered nanoscale containers, much like liposomes. Cryo-transmission electron microscopy (cryo-TEM) and small-angle neutron scattering (SANS) are employed for the first time to study these NERs. The results reveal that the NERs are discrete spheres (∼110 nm diameter) with a unilamellar membrane of thickness ∼4.5 nm. Remarkably, the biconcave disc-like shape of erythrocytes is also exhibited by the NERs under hypertonic conditions. Moreover, unlike typical liposomes, NERs show excellent colloidal stability in both buffer as well as in serum at room temperature, and are also able to withstand freeze-thaw cycling. We have explored the potential for using NERs as colloidal vehicles for targeted delivery. Much like conventional liposomes, NER membranes can be decorated with fluorescent or other markers, solutes can be encapsulated in the cores of the NERs, and NERs can be targeted to specifically bind to mammalian cells. Our study shows that NERs are a promising and versatile class of nanostructures. NERs that are harvested from a patient's own blood and reconfigured for nanomedicine can potentially offer several benefits including biocompatibility, minimization of immune response, and extended circulation time in the body.
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Affiliation(s)
- Yuan-Chia Kuo
- Fischell Department of Bioengineering, University of Maryland , College Park, Maryland 20742, United States
- Department of Radiation Oncology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Hsuan-Chen Wu
- Fischell Department of Bioengineering, University of Maryland , College Park, Maryland 20742, United States
- Department of Biochemical Science and Technology, National Taiwan University , Taipei 10617, Taiwan
| | - Dao Hoang
- Department of Chemical and Biomolecular Engineering, University of Maryland , College Park, Maryland 20742, United States
| | - William E Bentley
- Fischell Department of Bioengineering, University of Maryland , College Park, Maryland 20742, United States
| | - Warren D D'Souza
- Fischell Department of Bioengineering, University of Maryland , College Park, Maryland 20742, United States
- Department of Radiation Oncology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Srinivasa R Raghavan
- Fischell Department of Bioengineering, University of Maryland , College Park, Maryland 20742, United States
- Department of Chemical and Biomolecular Engineering, University of Maryland , College Park, Maryland 20742, United States
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Goindi S, Guleria A, Aggarwal N. Development and Evaluation of Solid Lipid Nanoparticles of N-6-Furfuryl Adenine for Prevention of Photoaging. J Biomed Nanotechnol 2015; 11:1734-46. [PMID: 26502637 DOI: 10.1166/jbn.2015.2111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
N-6-furfuryl adenine (N6FA) also known as "kinetin" is a biologically active natural phytochemical. It belongs to the category of cytokinins, the natural plant growth hormones that promote cell division and play role in cell differentiation. Overall, N6FA aids in increasing the plant's life span. Human cells also contain.small quantities of N6FA. Scientists are trying to understand its function in humans. N6FA is being investigated for its properties such as antiplatelet, antioxidant, antiproliferative and anti-aging effects on human cells. The aim of the present investigation was to prepare solid lipid nanoparticle (SLN) based topical formulations of N6FA and to evaluate its efficacy against ultraviolet (UV) radiation induced skin photodamage. SLNs were prepared by hot microemulsion technique and optimized for the type and concentration of lipid and surfactant(s). The optimized SLN formulation was characterized in terms of particle size, drug entrapment efficiency, zeta potential and pH; evaluated for stability, spreadability, ex-vivo skin permeation and photoprotective effects against UV induced skin damage. The cumulative amount of drug permeated through mice skin using SLNs was 3 folds higher than from conventional cream base. The results of biochemical and histopathological investigations of skin treated with N6FA loaded SLNs clearly demonstrated the efficacy of optimized formulation in preventing photodamage (lesions, ulcers and changes in skin integrity) due to chronic UV exposure. The effects were comparable with widely used marketed formulation, Garnier wrinkle lift anti-aging cream. Results suggested that N6FA incorporated into SLNs may provide therapeutic as well as cosmeceutical benefits.
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Hood RR, DeVoe DL. High-Throughput Continuous Flow Production of Nanoscale Liposomes by Microfluidic Vertical Flow Focusing. Small 2015; 11:5790-5799. [PMID: 26395346 DOI: 10.1002/smll.201501345] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/04/2015] [Indexed: 06/05/2023]
Abstract
Liposomes represent a leading class of nanoparticles for drug delivery. While a variety of techniques for liposome synthesis have been reported that take advantage of microfluidic flow elements to achieve precise control over the size and polydispersity of nanoscale liposomes, with important implications for nanomedicine applications, these methods suffer from extremely limited throughput, making them impractical for large-scale nanoparticle synthesis. High aspect ratio microfluidic vertical flow focusing is investigated here as a new approach to overcoming the throughput limits of established microfluidic nanoparticle synthesis techniques. Here the vertical flow focusing technique is utilized to generate populations of small, unilamellar, and nearly monodisperse liposomal nanoparticles with exceptionally high production rates and remarkable sample homogeneity. By leveraging this platform, liposomes with modal diameters ranging from 80 to 200 nm are prepared at production rates as high as 1.6 mg min(-1) in a simple flow-through process.
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Affiliation(s)
- Renee R Hood
- Department of Mechanical Engineering, 3126 Glenn L Martin Hall, University of Maryland, College Park, College Park, MD, 20742, USA
| | - Don L DeVoe
- Department of Mechanical Engineering, 3126 Glenn L Martin Hall, University of Maryland, College Park, College Park, MD, 20742, USA
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47
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Oliveira ACN, Raemdonck K, Martens T, Rombouts K, Simón-Vázquez R, Botelho C, Lopes I, Lúcio M, González-Fernández Á, Real Oliveira MECD, Gomes AC, Braeckmans K. Stealth monoolein-based nanocarriers for delivery of siRNA to cancer cells. Acta Biomater 2015. [PMID: 26225736 DOI: 10.1016/j.actbio.2015.07.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
While the delivery of small interfering RNAs (siRNAs) is an attractive strategy to treat several clinical conditions, siRNA-nanocarriers' stability after intravenous administration is still a major obstacle for the development of RNA-interference based therapies. But, although the need for stability is well recognized, the notion that strong stabilization can decrease nanocarriers' efficiency is sometimes neglected. In this work we evaluated two stealth functionalization strategies to stabilize the previously validated dioctadecyldimethylammonium bromide (DODAB):monoolein (MO) siRNA-lipoplexes. The nanocarriers were pre- and post-pegylated, forming vectors with different stabilities in biological fluids. The stealth nanocarriers' behavior was tested under biological mimetic conditions, as the production of stable siRNA-lipoplexes is determinant to achieve efficient intravenous siRNA delivery to cancer cells. Upon incubation in human serum for 2h, by fluorescence Single Particle Tracking microscopy, PEG-coated lipoplexes were found to have better colloidal stability as they could maintain a relatively stable size. In addition, using fluorescence fluctuation spectroscopy, post-pegylation also proved to avoid siRNA dissociation from the nanocarriers in human serum. Concomitantly it was found that PEG-coated lipoplexes improved cellular uptake and transfection efficiency in H1299 cells, and had the ability to silence BCR-ABL, affecting the survival of K562 cells. Based on an efficient cellular internalization, good silencing effect, good siRNA retention and good colloidal stability in human serum, DODAB:MO (2:1) siRNA-lipoplexes coated with PEG-Cer are considered promising nanocarriers for further in vivo validation. STATEMENT OF SIGNIFICANCE This work describes two stealth functionalization strategies for the stabilization of the previously validated dioctadecyldimethylammonium bromide (DODAB):monoolein (MO) siRNA-lipoplexes. These nanocarriers are capable of efficiently incorporating and delivering siRNA molecules to cells in order to silence genes whose expression is implicated in a pathological condition. The main objective was to functionalize these nanocarriers with a coating conferring protection to siRNA in blood without compromising its efficient delivery to cancer cells, validating the potential of DODAB:MO (2:1) siRNA-lipoplexes as therapeutic vectors. We show that the stealth strategy is determinant to achieve a stable and efficient nanocarrier, and that DODAB:MO mixtures have a very promising potential for systemic siRNA delivery to leukemic cells.
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Affiliation(s)
- Ana C N Oliveira
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal; Centre of Physics, Department of Physics, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Koen Raemdonck
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Thomas Martens
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium; Center for Nano- and Biophotonics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Koen Rombouts
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
| | - Rosana Simón-Vázquez
- Immunology, Biomedical Research Center (CINBIO) and Institute of Biomedical Research of Vigo (IBIV), University of Vigo, Campus Lagoas Marcosende, 36310 Vigo, Pontevedra, Spain
| | - Cláudia Botelho
- Centre of Biological Engineering (CEB), University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Ivo Lopes
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal; Centre of Physics, Department of Physics, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Marlene Lúcio
- Centre of Physics, Department of Physics, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - África González-Fernández
- Immunology, Biomedical Research Center (CINBIO) and Institute of Biomedical Research of Vigo (IBIV), University of Vigo, Campus Lagoas Marcosende, 36310 Vigo, Pontevedra, Spain
| | | | - Andreia C Gomes
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal.
| | - Kevin Braeckmans
- Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium; Center for Nano- and Biophotonics, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium
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48
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Abstract
We introduce an enzyme-free plasmonic immunoassay with a binary (all-or-none) response. The presence of a single pathogen in the sample results in a chemical cascade reaction leading to a large red to dark-blue colorimetric shift visible to the naked eye. The immediate and amplified response is initiated by a triggered breakdown of cysteine-loaded nanoliposomes and subsequent aggregation of plasmonic gold nanoparticles. Our approach enabled visual detection of a single-digit live pathogen of Salmonella, Listeria, and E. coli O157 in water and food samples. Furthermore, the assay allowed a naked-eye detection of target antibody concentrations as low as 6.7 attomolar (600 molecules in 150 μL); six orders of magnitude lower than conventional enzyme-linked immunosorbent assay (ELISA).
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Affiliation(s)
- Minh-Phuong Ngoc Bui
- Department of Bioproducts and Biosystems Engineering, University of Minnesota Twin Cities , St. Paul, Minnesota 55108-6005, United States
| | - Snober Ahmed
- Department of Bioproducts and Biosystems Engineering, University of Minnesota Twin Cities , St. Paul, Minnesota 55108-6005, United States
| | - Abdennour Abbas
- Department of Bioproducts and Biosystems Engineering, University of Minnesota Twin Cities , St. Paul, Minnesota 55108-6005, United States
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49
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Hsu WC, Cheng CN, Lee TW, Hwang JJ. Cytotoxic Effects of PEGylated Anti-EGFR Immunoliposomes Combined with Doxorubicin and Rhenium-188 Against Cancer Cells. Anticancer Res 2015; 35:4777-4788. [PMID: 26254368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND/AIM We aimed to construct epidermal growth factor receptor (EGFR)-targeting cetuximab-immunoliposomes (IL-C225) for targeted delivery of doxorubicin and rhenium-188 (Re-188) to EGFR(+) cancer cells. MATERIALS AND METHODS Synthesized IL-C225 was analyzed by dynamic light scattering, transmission electron microscopy, and matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy. Cell binding and internalization were examined using doxorubicin-loaded IL-C225 (DXR-IL-C225) with confocal microscopy. IL-C225 combined with doxorubicin and Re-188 ((188)Re-DXR-IL-C225) was synthesized, and the cytotoxic effects of (188)Re-DXR-IL-C225 were analyzed in EGFR(+) cancer cells using cell viability assays. RESULTS IL-C225 bound to EGFR on A431 cancer cells and was rapidly internalized. Furthermore, IL-C225 localized within the tumor cells efficiently. (188)Re-DXR-IL-C225 exhibited outstanding cytotoxic effects against EGFR(+) cancer cells in vitro and showed superior cytotoxic effects compared to DXR-IL-C225 or (188)Re-IL-C225 alone. CONCLUSION The new formulation of (188)Re-DXR-IL-C225 may be a potential theranostic vehicle for delivery of drugs in the treatment of EGFR-overexpressing human cancer.
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Affiliation(s)
- Wei-Chuan Hsu
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan, R.O.C. Division of Isotope Application, Institute of Nuclear Energy Research, Taoyuan, Taiwan, R.O.C
| | - Chu-Nian Cheng
- Division of Isotope Application, Institute of Nuclear Energy Research, Taoyuan, Taiwan, R.O.C
| | - Te-Wei Lee
- Division of Isotope Application, Institute of Nuclear Energy Research, Taoyuan, Taiwan, R.O.C.
| | - Jeng-Jong Hwang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan, R.O.C.
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Hadjidemetriou M, Al-Ahmady Z, Mazza M, Collins RF, Dawson K, Kostarelos K. In Vivo Biomolecule Corona around Blood-Circulating, Clinically Used and Antibody-Targeted Lipid Bilayer Nanoscale Vesicles. ACS Nano 2015; 9:8142-56. [PMID: 26135229 DOI: 10.1021/acsnano.5b03300] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The adsorption of proteins and their layering onto nanoparticle surfaces has been called the "protein corona". This dynamic process of protein adsorption has been extensively studied following in vitro incubation of many different nanoparticles with plasma proteins. However, the formation of protein corona under dynamic, in vivo conditions remains largely unexplored. Extrapolation of in vitro formed protein coronas to predict the fate and possible toxicological burden from nanoparticles in vivo is of great interest. However, complete lack of such direct comparisons for clinically used nanoparticles makes the study of in vitro and in vivo formed protein coronas of great importance. Our aim was to study the in vivo protein corona formed onto intravenously injected, clinically used liposomes, based on the composition of the PEGylated liposomal formulation that constitutes the anticancer agent Doxil. The formation of in vivo protein corona was determined after the recovery of the liposomes from the blood circulation of CD-1 mice 10 min postinjection. In comparison, in vitro protein corona was formed by the incubation of liposomes in CD-1 mouse plasma. In vivo and in vitro formed protein coronas were compared in terms of morphology, composition and cellular internalization. The protein coronas on bare (non-PEGylated) and monoclonal antibody (IgG) targeted liposomes of the same lipid composition were also comparatively investigated. A network of linear fibrillary structures constituted the in vitro formed protein corona, whereas the in vivo corona had a different morphology but did not appear to coat the liposome surface entirely. Even though the total amount of protein attached on circulating liposomes correlated with that observed from in vitro incubations, the variety of molecular species in the in vivo corona were considerably wider. Both in vitro and in vivo formed protein coronas were found to significantly reduce receptor binding and cellular internalization of antibody-conjugated liposomes; however, the in vivo corona formation did not lead to complete ablation of their targeting capability.
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Affiliation(s)
| | | | | | | | - Kenneth Dawson
- Centre For BioNano Interactions (CBNI), School of Chemistry and Chemical Biology, University College Dublin , Belfield, Dublin 4, Ireland
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