1
|
Zhang J, Yang Y, Al-Ahmady ZS, Du W, Duan J, Liao Z, Sun Q, Wei Z, Hua J. Maternal exposure to PM 2.5 induces cognitive impairment in offspring via cerebellar neuroinflammation and oxidative stress. Ecotoxicol Environ Saf 2023; 249:114425. [PMID: 38321695 DOI: 10.1016/j.ecoenv.2022.114425] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 09/02/2023]
Abstract
Available evidence suggest that exposure to PM2.5 during pregnancy is associated with reduced cognitive function in offspring. This study aimed to investigate the effects of maternal exposure to PM2.5 on offspring cognitive function and to elucidate the underlying mechanisms. In this work, pregnant C57BL/6 female mice were exposed to concentrated ambient PM2.5 or filtered air from day 0.5 (=vaginal plug) to day 15.5 in the Shanghai Meteorological and Environmental Animal Exposure System, and offspring cerebellar tissues were collected on embryonic day 15.5, as well as postnatal days 0, 10 and 42. The mean PM2.5 concentrations exposed to the pregnant mice were 73.06 ± 4.90 μg/m3 and 11.15 ± 2.71 μg/m3 in the concentrated ambient PM2.5 and filtered air chambers, respectively. Maternal concentrated PM2.5 exposure was negatively correlated with offspring spatial memory significantly as assessed by the Morris water maze. Compared with the filtered air group, PM2.5-exposed offspring mice had reduced cerebellar microglia. Both RNA and protein levels of IL-8 and TNF-α were elevated in the concentrated ambient PM2.5 group. PM2.5 exposure increased the level of 8-OHG in miRNA of microglia and Purkinje cells in 6-week-old offspring. The level of prostaglandin F2α (8-iso-PGF2Aα) in the cerebellum was increased at different growing stages of offspring after gestational exposure of PM2.5. These results suggested that maternal air pollution exposure might cause inflammatory damage and oxidative stress to the cerebellum, contributing to reduced cognitive performance in mice offspring.
Collapse
Affiliation(s)
- Jiajia Zhang
- Shanghai Key Laboratory of Maternal Fetal Medicine, Department of Women and Children's Health Care, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Yingying Yang
- Clinical Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai 200092, China
| | - Zahraa S Al-Ahmady
- Pharmacology Department, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom; Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, AV Hill Building, The University of Manchester, Manchester M13 9PT, United Kingdom
| | - Wenchong Du
- NTU Psychology, School of Social Sciences, Nottingham Trent University, Nottingham NG1 1BU, United Kingdom
| | - Jinjin Duan
- Drug Discovery and Design Center, the Center for Chemical Biology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medical, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zehuan Liao
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore; Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, Biomedicum, Solnavägen 9, SE-17177 Stockholm, Sweden
| | - Qinghua Sun
- School of Public Health, Zhejiang Chinese Medical University, Zhejiang 310053, China
| | - Zhiyun Wei
- Shanghai Key Laboratory of Maternal Fetal Medicine, Department of Women and Children's Health Care, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai 200092, China.
| | - Jing Hua
- Shanghai Key Laboratory of Maternal Fetal Medicine, Department of Women and Children's Health Care, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai 200092, China.
| |
Collapse
|
2
|
Al-Ahmady ZS, Dickie BR, Aldred I, Jasim DA, Barrington J, Haley M, Lemarchand E, Coutts G, Kaur S, Bates J, Curran S, Goddard R, Walker M, Parry-jones A, Kostarelos K, Allan SM. Selective brain entry of lipid nanoparticles in haemorrhagic stroke is linked to biphasic blood-brain barrier disruption. Am J Cancer Res 2022; 12:4477-4497. [PMID: 35832077 PMCID: PMC9254235 DOI: 10.7150/thno.72167] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/29/2022] [Indexed: 11/05/2022] Open
|
3
|
Abstract
Since its first emergence in December 2019, the coronavirus-2 infection has quickly spread around the world and the severity of the pandemic has already re-shaped our lives. This review highlights the role of nanotechnology in the fight against this pandemic with a focus on the design of effective nano-based prevention and treatment options that overcome the limitations associated with conventional vaccines and other therapies. How nanotechnology could be utilized to understand the pathology of the ongoing pandemic is also discussed as well as how our knowledge about SARS-CoV-2 cellular uptake and toxicity could influence future nanotoxicological considerations and nanomedicine design of safe yet effective nanomaterials.
Collapse
|
4
|
Al-Ahmady ZS, Jasim D, Ahmad SS, Wong R, Haley M, Coutts G, Schiessl I, Allan SM, Kostarelos K. Selective Liposomal Transport through Blood Brain Barrier Disruption in Ischemic Stroke Reveals Two Distinct Therapeutic Opportunities. ACS Nano 2019; 13:12470-12486. [PMID: 31693858 DOI: 10.1021/acsnano.9b01808] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [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: 06/10/2023]
Abstract
The development of effective therapies for stroke continues to face repeated translational failures. Brain endothelial cells form paracellular and transcellular barriers to many blood-borne therapies, and the development of efficient delivery strategies is highly warranted. Here, in a mouse model of stroke, we show selective recruitment of clinically used liposomes into the ischemic brain that correlates with biphasic blood brain barrier (BBB) breakdown. Intravenous administration of liposomes into mice exposed to transient middle cerebral artery occlusion took place at early (0.5 and 4 h) and delayed (24 and 48 h) time points, covering different phases of BBB disruption after stroke. Using a combination of in vivo real-time imaging and histological analysis we show that selective liposomal brain accumulation coincides with biphasic enhancement in transcellular transport followed by a delayed impairment to the paracellular barrier. This process precedes neurological damage in the acute phase and maintains long-term liposomal colocalization within the neurovascular unit, which could have great potential for neuroprotection. Levels of liposomal uptake by glial cells are similarly selectively enhanced in the ischemic region late after experimental stroke (2-3 days), highlighting their potential for blocking delayed inflammatory responses or shifting the polarization of microglia/macrophages toward brain repair. These findings demonstrate the capability of liposomes to maximize selective translocation into the brain after stroke and identify two windows for therapeutic manipulation. This emphasizes the benefits of selective drug delivery for efficient tailoring of stroke treatments.
Collapse
Affiliation(s)
- Zahraa S Al-Ahmady
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, AV Hill Building , The University of Manchester , Manchester M13 9PT , United Kingdom
- Pharmacology Department, School of Science and Technology , Nottingham Trent University , Nottingham NG11 8NS , United Kingdom
| | - Dhifaf Jasim
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, AV Hill Building , The University of Manchester , Manchester M13 9PT , United Kingdom
| | - Sabahuddin Syed Ahmad
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, AV Hill Building , The University of Manchester , Manchester M13 9PT , United Kingdom
| | - Raymond Wong
- Lydia Becker Institute of Immunology and Inflammation, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Manchester Academic Health Science Centre, AV Hill Building, Manchester M13 9PT , United Kingdom
| | - Michael Haley
- Lydia Becker Institute of Immunology and Inflammation, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Manchester Academic Health Science Centre, AV Hill Building, Manchester M13 9PT , United Kingdom
| | - Graham Coutts
- Lydia Becker Institute of Immunology and Inflammation, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Manchester Academic Health Science Centre, AV Hill Building, Manchester M13 9PT , United Kingdom
| | - Ingo Schiessl
- Lydia Becker Institute of Immunology and Inflammation, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Manchester Academic Health Science Centre, AV Hill Building, Manchester M13 9PT , United Kingdom
| | - Stuart M Allan
- Lydia Becker Institute of Immunology and Inflammation, Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Manchester Academic Health Science Centre, AV Hill Building, Manchester M13 9PT , United Kingdom
| | - Kostas Kostarelos
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, AV Hill Building , The University of Manchester , Manchester M13 9PT , United Kingdom
| |
Collapse
|
5
|
Al-Ahmady ZS, Donno R, Gennari A, Prestat E, Marotta R, Mironov A, Newman L, Lawrence MJ, Tirelli N, Ashford M, Kostarelos K. Enhanced Intraliposomal Metallic Nanoparticle Payload Capacity Using Microfluidic-Assisted Self-Assembly. Langmuir 2019; 35:13318-13331. [PMID: 31478662 DOI: 10.1021/acs.langmuir.9b00579] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Hybrids composed of liposomes (L) and metallic nanoparticles (NPs) hold great potential for imaging and drug delivery purposes. However, the efficient incorporation of metallic NPs into liposomes using conventional methodologies has so far proved to be challenging. In this study, we report the fabrication of hybrids of liposomes and hydrophobic gold NPs of size 2-4 nm (Au) using a microfluidic-assisted self-assembly process. The incorporation of increasing amounts of AuNPs into liposomes was examined using microfluidics and compared to L-AuNP hybrids prepared by the reverse-phase evaporation method. Our microfluidics strategy produced L-AuNP hybrids with a homogeneous size distribution, a smaller polydispersity index, and a threefold increase in loading efficiency when compared to those hybrids prepared using the reverse-phase method of production. Quantification of the loading efficiency was determined by ultraviolet spectroscopy, inductively coupled plasma mass spectroscopy, and centrifugal field flow fractionation, and qualitative validation was confirmed by transmission electron microscopy. The higher loading of gold NPs into the liposomes achieved using microfluidics produced a slightly thicker and more rigid bilayer as determined with small-angle neutron scattering. These observations were confirmed using fluorescent anisotropy and atomic force microscopy. Structural characterization of the liposomal-NP hybrids with cryo-electron microscopy revealed the coexistence of membrane-embedded and interdigitated NP-rich domains, suggesting AuNP incorporation through hydrophobic interactions. The microfluidic technique that we describe in this study allows for the automated production of monodisperse liposomal-NP hybrids with high loading capacity, highlighting the utility of microfluidics to improve the payload of metallic NPs within liposomes, thereby enhancing their application for imaging and drug delivery.
Collapse
Affiliation(s)
- Zahraa S Al-Ahmady
- Nanomedicine Lab, Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health , University of Manchester , Av Hill Building , Manchester M13 9PT , U.K
- Pharmacology Department, School of Science and Technology , Nottingham Trent University , Nottingham NG11 8NS , U.K
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
| | - Roberto Donno
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
- Laboratory of Polymers and Biomaterials , Fondazione Istituto Italiano di Tecnologia , 16163 , Genova , Italy
| | - Arianna Gennari
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
- Laboratory of Polymers and Biomaterials , Fondazione Istituto Italiano di Tecnologia , 16163 , Genova , Italy
| | - Eric Prestat
- SuperSTEM Laboratory , SciTech Daresbury Campus , Keckwick Lane, Warrington WA4 4AD , U.K
| | - Roberto Marotta
- Electron Microscopy Laboratory , Fondazione Istituto Italiano di Tecnologia , 16163 Genova , Italy
| | | | - Leon Newman
- Nanomedicine Lab, Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health , University of Manchester , Av Hill Building , Manchester M13 9PT , U.K
| | - M Jayne Lawrence
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
| | - Nicola Tirelli
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
- Laboratory of Polymers and Biomaterials , Fondazione Istituto Italiano di Tecnologia , 16163 , Genova , Italy
| | - Marianne Ashford
- Advanced Drug Delivery Pharmaceutical Sciences, IMED Biotech Unit , AstraZeneca , Macclesfield SK10 2NA , U.K
| | - Kostas Kostarelos
- Nanomedicine Lab, Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health , University of Manchester , Av Hill Building , Manchester M13 9PT , U.K
- North West Centre of Advanced Drug Delivery (NoWCADD), Division of Pharmacy & Optometry, School of Health Sciences, Faculty of Biology, Medicine and Health , University of Manchester , Stopford Building , Manchester , M13 9PT , U.K
| |
Collapse
|
6
|
Vidmar J, Loeschner K, Correia M, Larsen EH, Manser P, Wichser A, Boodhia K, Al-Ahmady ZS, Ruiz J, Astruc D, Buerki-Thurnherr T. Translocation of silver nanoparticles in the ex vivo human placenta perfusion model characterized by single particle ICP-MS. Nanoscale 2018; 10:11980-11991. [PMID: 29904776 DOI: 10.1039/c8nr02096e] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
With the extensive use of silver nanoparticles (AgNPs) in various consumer products their potential toxicity is of great concern especially for highly sensitive population groups such as pregnant women and even the developing fetus. To understand if AgNPs are taken up and cross the human placenta, we studied their translocation and accumulation in the human ex vivo placenta perfusion model by single particle ICP-MS (spICP-MS). The impact of different surface modifications on placental transfer was assessed by AgNPs with two different modifications: polyethylene glycol (AgPEG NPs) and sodium carboxylate (AgCOONa NPs). AgNPs and ionic Ag were detected in the fetal circulation in low but not negligible amounts. Slightly higher Ag translocation across the placental barrier for perfusion with AgPEG NPs and higher AgNP accumulation in placental tissue for perfusion with AgCOONa NPs were observed. Since these AgNPs are soluble in water, we tried to distinguish between the translocation of dissolved and particulate Ag. Perfusion with AgNO3 revealed the formation of Ag containing NPs in both circulations over time, of which the amount and their size in the fetal circulation were comparable to those from perfusion experiments with both AgNP types. Although we were not able to clarify whether intact AgNPs and/or Ag precipitates from dissolved Ag cross the placental barrier, our study highlights that uptake of Ag ions and/or dissolution of AgNPs in the tissue followed by re-precipitation in the fetal circulation needs to be considered as an important pathway in studies of AgNP translocation across biological barriers.
Collapse
Affiliation(s)
- Janja Vidmar
- Department of Environmental Sciences, JoŽef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia and JoŽef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Katrin Loeschner
- Research Group for Nano-Bio Science, Division for Food Technology, National Food Institute, Technical University of Denmark, Kemitorvet 201, DK-2800 Kgs. Lyngby, Denmark
| | - Manuel Correia
- Research Group for Nano-Bio Science, Division for Food Technology, National Food Institute, Technical University of Denmark, Kemitorvet 201, DK-2800 Kgs. Lyngby, Denmark
| | - Erik H Larsen
- Research Group for Nano-Bio Science, Division for Food Technology, National Food Institute, Technical University of Denmark, Kemitorvet 201, DK-2800 Kgs. Lyngby, Denmark
| | - Pius Manser
- Particles-Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.
| | - Adrian Wichser
- Particles-Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland. and Analytical Chemistry, Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Kailen Boodhia
- National Institute for Occupational Health, National Health Laboratory Service, 25 Hospital Street, Constitution Hill, 4788 Johannesburg, South Africa
| | - Zahraa S Al-Ahmady
- Faculty of Biology, Medicine and Health, Division of Pharmacy and Optometry, Nanomedicine Lab, University of Manchester, Oxford Road, M13 9PL Manchester, UK
| | - Jaimé Ruiz
- ISM, UMR CNRS 5255, Univ. Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, UMR CNRS 5255, Univ. Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Tina Buerki-Thurnherr
- Particles-Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.
| |
Collapse
|
7
|
Affiliation(s)
- Zahraa S. Al-Ahmady
- Nanomedicine Lab, Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Heath, University of Manchester, UK
| |
Collapse
|
8
|
Lozano N, Al-Ahmady ZS, Beziere NS, Ntziachristos V, Kostarelos K. Monoclonal antibody-targeted PEGylated liposome-ICG encapsulating doxorubicin as a potential theranostic agent. Int J Pharm 2015; 482:2-10. [DOI: 10.1016/j.ijpharm.2014.10.045] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 10/17/2014] [Indexed: 11/30/2022]
|
9
|
Al-Ahmady ZS, Scudamore CL, Kostarelos K. Triggered doxorubicin release in solid tumors from thermosensitive liposome-peptide hybrids: Critical parameters and therapeutic efficacy. Int J Cancer 2015; 137:731-43. [PMID: 25639452 DOI: 10.1002/ijc.29430] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 12/22/2014] [Indexed: 12/20/2022]
Abstract
Temperature-sensitive vesicles designed by inclusion of leucine zipper peptides within a lipid bilayer (Lp-Peptide hybrids) encapsulating Doxorubicin (DOX) have been reported. Intravenous administration of these constructs prolonged blood circulation kinetics and increased tumor accumulation in vivo with local mild hyperthermia. In this study, the biological activity of the DOX-loaded Lp-Peptide hybrid vesicles was further investigated at the cellular level and in vivo compared to lysolipid-containing temperature-sensitive liposomes (LTSL) and traditional temperature-sensitive liposomes. Lp-Peptide vesicles were not toxic to cell cultures at 37°C, while effective cancer cell toxicity was observed after 1 hr of heating at 42°C. The activity of Lp-Peptide vesicles in vivo was studied using two different heating protocols to obtain tumor intravascular or interstitial drug release. Lp-Peptide vesicle treatment allowing intravascular DOX release showed equally effective tumor growth retardation and survival to that of LTSL treatment. The Lp-Peptide vesicles also offered therapeutic responses using the alternative heating protocol to maximise drug release within the tumor interstitium. Matching the drug release kinetics of temperature-sensitive vesicles with the heating protocol applied is considered the most critical factor to determine therapeutic efficacy in the clinical translation of such modalities.
Collapse
Affiliation(s)
- Zahraa S Al-Ahmady
- Nanomedicine Lab, Institute of Inflammation and Repair, Manchester Cancer Research Centre, Faculty of Medical & Human Sciences, University of Manchester, United Kingdom.,UCL School of Pharmacy, Department of Pharmaceutics, University College London, Brunswick Square, WC1N 1AX, United Kingdom
| | - Cheryl L Scudamore
- Harwell Science and Innovation Campus, MRC Harwell, Oxfordshire, OX110RD, United Kingdom
| | - Kostas Kostarelos
- Nanomedicine Lab, Institute of Inflammation and Repair, Manchester Cancer Research Centre, Faculty of Medical & Human Sciences, University of Manchester, United Kingdom.,UCL School of Pharmacy, Department of Pharmaceutics, University College London, Brunswick Square, WC1N 1AX, United Kingdom
| |
Collapse
|
10
|
Al-Ahmady ZS, Al-Jamal WT, Bossche JV, Bui TT, Drake AF, Mason AJ, Kostarelos K. Lipid-peptide vesicle nanoscale hybrids for triggered drug release by mild hyperthermia in vitro and in vivo. ACS Nano 2012; 6:9335-46. [PMID: 22857653 PMCID: PMC3480335 DOI: 10.1021/nn302148p] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [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] [Indexed: 05/20/2023]
Abstract
The present study describes leucine zipper peptide-lipid hybrid nanoscale vesicles engineered by self-assembled anchoring of the amphiphilic peptide within the lipid bilayer. These hybrid vesicles aim to combine the advantages of traditional temperature-sensitive liposomes (TSL) with the dissociative, unfolding properties of a temperature-sensitive peptide to optimize drug release under mild hyperthermia, while improving in vivo drug retention. The secondary structure of the peptide and its thermal responsiveness after anchoring onto liposomes were studied with circular dichroism. In addition, the lipid-peptide vesicles (Lp-peptide) showed a reduction in bilayer fluidity at the inner core, as observed with DPH anisotropy studies, while the opposite effect was observed with an ANS probe, indicating peptide interactions with both the headgroup region and the hydrophobic core. A model drug molecule, doxorubicin, was successfully encapsulated in the Lp-peptide vesicles at higher than 90% efficiency following the remote loading, pH-gradient methodology. The release of doxorubicin from Lp-peptide hybrids in vitro indicated superior serum stability at physiological temperatures compared to lysolipid-containing temperature-sensitive liposomes (LTSL) without affecting the overall thermo-responsive nature of the vesicles at 42 °C. A similar stabilizing effect was observed in vivo after intravenous administration of the Lp-peptide vesicles by measuring (14)C-doxorubicin blood kinetics that also led to increased tumor accumulation after 24 h. We conclude that Lp-peptide hybrid vesicles present a promising new class of TSL that can offer previously unexplored opportunities for the development of clinically relevant mild hyperthermia-triggered therapeutic modalities.
Collapse
Affiliation(s)
- Zahraa S. Al-Ahmady
- Nanomedicine Lab, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, United Kingdom
| | - Wafa’ T. Al-Jamal
- Nanomedicine Lab, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, United Kingdom
| | - Jeroen V. Bossche
- Nanomedicine Lab, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, United Kingdom
| | - Tam T. Bui
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Alex F. Drake
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - A. James Mason
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Kostas Kostarelos
- Nanomedicine Lab, Centre for Drug Delivery Research, UCL School of Pharmacy, University College London, WC1N 1AX, United Kingdom
| |
Collapse
|
11
|
Al-Jamal WT, Al-Ahmady ZS, Kostarelos K. Pharmacokinetics & tissue distribution of temperature-sensitive liposomal doxorubicin in tumor-bearing mice triggered with mild hyperthermia. Biomaterials 2012; 33:4608-17. [DOI: 10.1016/j.biomaterials.2012.03.018] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 03/04/2012] [Indexed: 10/28/2022]
|