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Purohit MP, Roy KS, Xiang Y, Yu BJ, Azadian MM, Muwanga G, Hart AR, Taoube AK, Lopez DG, Airan RD. Acoustomechanically activatable liposomes for ultrasonic drug uncaging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.23.563690. [PMID: 37961368 PMCID: PMC10634775 DOI: 10.1101/2023.10.23.563690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Ultrasound-activatable drug-loaded nanocarriers enable noninvasive and spatiotemporally-precise on-demand drug delivery throughout the body. However, most systems for ultrasonic drug uncaging utilize cavitation or heating as the drug release mechanism and often incorporate relatively exotic excipients into the formulation that together limit the drug-loading potential, stability, and clinical translatability and applicability of these systems. Here we describe an alternate strategy for the design of such systems in which the acoustic impedance and osmolarity of the internal liquid phase of a drug-loaded particle is tuned to maximize ultrasound-induced drug release. No gas phase, cavitation, or medium heating is necessary for the drug release mechanism. Instead, a non-cavitation-based mechanical response to ultrasound mediates the drug release. Importantly, this strategy can be implemented with relatively common pharmaceutical excipients, as we demonstrate here by implementing this mechanism with the inclusion of a few percent sucrose into the internal buffer of a liposome. Further, the ultrasound protocols sufficient for in vivo drug uncaging with this system are achievable with current clinical therapeutic ultrasound systems and with intensities that are within FDA and society guidelines for safe transcranial ultrasound application. Finally, this current implementation of this mechanism should be versatile and effective for the loading and uncaging of any therapeutic that may be loaded into a liposome, as we demonstrate for four different drugs in vitro, and two in vivo. These acoustomechanically activatable liposomes formulated with common pharmaceutical excipients promise a system with high clinical translational potential for ultrasonic drug uncaging of myriad drugs of clinical interest.
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Affiliation(s)
| | - Kanchan Sinha Roy
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
| | - Yun Xiang
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
| | - Brenda J. Yu
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Biophysics Program, Stanford University, Stanford, CA, 94305 USA
| | - Matine M. Azadian
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Neurosciences Program, Stanford University, Stanford, CA, 94305 USA
| | - Gabriella Muwanga
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Neurosciences Program, Stanford University, Stanford, CA, 94305 USA
| | - Alex R. Hart
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Department of Chemistry, Stanford University, Stanford, CA, 94305 USA
| | - Ali K. Taoube
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
| | - Diego Gomez Lopez
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Department of Medicine, Health, and Society, Vanderbilt University, Nashville, TN 37235 USA
| | - Raag D. Airan
- Department of Radiology, Stanford University, Stanford, CA, 94305 USA
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, 94305 USA
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305 USA
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Chroni A, Mavromoustakos T, Pispas S. Curcumin-Loaded PnBA- b-POEGA Nanoformulations: A Study of Drug-Polymer Interactions and Release Behavior. Int J Mol Sci 2023; 24:4621. [PMID: 36902057 PMCID: PMC10003461 DOI: 10.3390/ijms24054621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
The current study focuses on the development of innovative and highly-stable curcumin (CUR)-based therapeutics by encapsulating CUR in biocompatible poly(n-butyl acrylate)-block-poly(oligo(ethylene glycol) methyl ether acrylate) (PnBA-b-POEGA) micelles. State-of-the-art methods were used to investigate the encapsulation of CUR in PnBA-b-POEGA micelles and the potential of ultrasound to enhance the release of encapsulated CUR. Dynamic light scattering (DLS), attenuated total reflection Fourier transform infrared (ATR-FTIR), and ultraviolet-visible (UV-Vis) spectroscopies confirmed the successful encapsulation of CUR within the hydrophobic domains of the copolymers, resulting in the formation of distinct and robust drug/polymer nanostructures. The exceptional stability of the CUR-loaded PnBA-b-POEGA nanocarriers over a period of 210 days was also demonstrated by proton nuclear magnetic resonance (1H-NMR) spectroscopy studies. A comprehensive 2D NMR characterization of the CUR-loaded nanocarriers authenticated the presence of CUR within the micelles, and unveiled the intricate nature of the drug-polymer intermolecular interactions. The UV-Vis results also indicated high encapsulation efficiency values for the CUR-loaded nanocarriers and revealed a significant influence of ultrasound on the release profile of CUR. The present research provides new understanding of the encapsulation and release mechanisms of CUR within biocompatible diblock copolymers and has significant implications for the advancement of safe and effective CUR-based therapeutics.
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Affiliation(s)
- Angeliki Chroni
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Thomas Mavromoustakos
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimioupolis, 15771 Zografou, Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
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Döring K, Sperling S, Ninkovic M, Schroeder H, Fischer A, Stadelmann C, Streit F, Binder L, Mielke D, Rohde V, Malinova V. Ultrasound-Induced Release of Nimodipine from Drug-Loaded Block Copolymer Micelles: In Vivo Analysis. Transl Stroke Res 2022; 13:792-800. [PMID: 34988870 PMCID: PMC9391244 DOI: 10.1007/s12975-021-00979-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 12/01/2021] [Accepted: 12/14/2021] [Indexed: 12/03/2022]
Abstract
Nimodipine prevents cerebral vasospasm and improves functional outcome after aneurysmal subarachnoid hemorrhage (aSAH). The beneficial effect is limited by low oral bioavailability of nimodipine, which resulted in an increasing use of nanocarriers with sustained intrathecal drug release in order to overcome this limitation. However, this approach facilitates only a continuous and not an on-demand nimodipine release during the peak time of vasospasm development. In this study, we aimed to assess the concept of controlled drug release from nimodipine-loaded copolymers by ultrasound application in the chicken chorioallantoic membrane (CAM) model. Nimodipine-loaded copolymers were produced with the direct dissolution method. Vasospasm of the CAM vessels was induced by means of ultrasound (Physiomed, continuous wave, 3 MHz, 1.0 W/cm2). The ultrasound-mediated nimodipine release (Physiomed, continuous wave, 1 MHz, 1.7 W/cm2) and its effect on the CAM vessels were evaluated. Measurements of vessel diameter before and after ultrasound-induced nimodipine release were performed using ImageJ. The CAM model could be successfully carried out in all 25 eggs. After vasospasm induction and before drug release, the mean vessel diameter was at 57% (range 44-61%) compared to the baseline diameter (set at 100%). After ultrasound-induced drug release, the mean vessel diameter of spastic vessels increased again to 89% (range 83-91%) of their baseline diameter, which was significant (p = 0.0002). We were able to provide a proof of concept for in vivo vasospasm induction by ultrasound application in the CAM model and subsequent resolution by ultrasound-mediated nimodipine release from nanocarriers. This concept merits further evaluation in a rat SAH model.
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Affiliation(s)
- Katja Döring
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany
- Department of Neuroradiology, University Medical Center Göttingen, Göttingen, Germany
| | - Swetlana Sperling
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany
| | - Milena Ninkovic
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany
| | - Henning Schroeder
- Department for Epigenetics and System Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases, Göttingen, Germany
| | - André Fischer
- Department for Epigenetics and System Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases, Göttingen, Germany
| | - Christine Stadelmann
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Frank Streit
- Institute for Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Lutz Binder
- Institute for Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Dorothee Mielke
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany
| | - Veit Rohde
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany
| | - Vesna Malinova
- Department of Neurosurgery, University Medical Center Göttingen, Göttingen, Germany.
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He J, Liu Z, Zhu X, Xia H, Gao H, Lu J. Ultrasonic Microbubble Cavitation Enhanced Tissue Permeability and Drug Diffusion in Solid Tumor Therapy. Pharmaceutics 2022; 14:1642. [PMID: 36015267 PMCID: PMC9414228 DOI: 10.3390/pharmaceutics14081642] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/31/2022] [Accepted: 08/04/2022] [Indexed: 01/21/2023] Open
Abstract
Chemotherapy has an essential role not only in advanced solid tumor therapy intervention but also in society's health at large. Chemoresistance, however, seriously restricts the efficiency and sensitivity of chemotherapeutic agents, representing a significant threat to patients' quality of life and life expectancy. How to reverse chemoresistance, improve efficacy sensitization response, and reduce adverse side effects need to be tackled urgently. Recently, studies on the effect of ultrasonic microbubble cavitation on enhanced tissue permeability and retention (EPR) have attracted the attention of researchers. Compared with the traditional targeted drug delivery regimen, the microbubble cavitation effect, which can be used to enhance the EPR effect, has the advantages of less trauma, low cost, and good sensitization effect, and has significant application prospects. This article reviews the research progress of ultrasound-mediated microbubble cavitation in the treatment of solid tumors and discusses its mechanism of action to provide new ideas for better treatment strategies.
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Affiliation(s)
- Jide He
- Department of Urology, Peking University Third Hospital, Beijing 100191, China
| | - Zenan Liu
- Department of Urology, Peking University Third Hospital, Beijing 100191, China
| | - Xuehua Zhu
- Department of Urology, Peking University Third Hospital, Beijing 100191, China
| | - Haizhui Xia
- Department of Urology, Peking University Third Hospital, Beijing 100191, China
| | - Huile Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610064, China
| | - Jian Lu
- Department of Urology, Peking University Third Hospital, Beijing 100191, China
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Lu S, Zhao P, Deng Y, Liu Y. Mechanistic Insights and Therapeutic Delivery through Micro/Nanobubble-Assisted Ultrasound. Pharmaceutics 2022; 14:pharmaceutics14030480. [PMID: 35335857 PMCID: PMC8954263 DOI: 10.3390/pharmaceutics14030480] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/12/2022] [Accepted: 02/19/2022] [Indexed: 02/05/2023] Open
Abstract
Ultrasound with low frequency (20–100 kHz) assisted drug delivery has been widely investigated as a non-invasive method to enhance the permeability and retention effect of drugs. The functional micro/nanobubble loaded with drugs could provide an unprecedented opportunity for targeted delivery. Then, ultrasound with higher intensity would locally burst bubbles and release agents, thus avoiding side effects associated with systemic administration. Furthermore, ultrasound-mediated destruction of micro/nanobubbles can effectively increase the permeability of vascular membranes and cell membranes, thereby not only increasing the distribution concentration of drugs in the interstitial space of target tissues but also promoting the penetration of drugs through cell membranes into the cytoplasm. These advancements have transformed ultrasound from a purely diagnostic utility into a promising theragnostic tool. In this review, we first discuss the structure and generation of micro/nanobubbles. Second, ultrasound parameters and mechanisms of therapeutic delivery are discussed. Third, potential biomedical applications of micro/nanobubble-assisted ultrasound are summarized. Finally, we discuss the challenges and future directions of ultrasound combined with micro/nanobubbles.
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Mukhopadhyay D, Sano C, AlSawaftah N, El-Awady R, Husseini GA, Paul V. Ultrasound-Mediated Cancer Therapeutics Delivery using Micelles and Liposomes: A Review. Recent Pat Anticancer Drug Discov 2021; 16:498-520. [PMID: 34911412 DOI: 10.2174/1574892816666210706155110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/02/2021] [Accepted: 03/21/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Existing cancer treatment methods have many undesirable side effects that greatly reduce the quality of life of cancer patients. OBJECTIVE This review will focus on the use of ultrasound-responsive liposomes and polymeric micelles in cancer therapy. METHODS This review presents a survey of the literature regarding ultrasound-triggered micelles and liposomes using articles recently published in various journals, as well as some new patents in this field. RESULTS Nanoparticles have proven promising as cancer theranostic tools. Nanoparticles are selective in nature, have reduced toxicity, and controllable drug release patterns making them ideal carriers for anticancer drugs. Numerous nanocarriers have been designed to combat malignancies, including liposomes, micelles, dendrimers, solid nanoparticles, quantum dots, gold nanoparticles, and, more recently, metal-organic frameworks. The temporal and spatial release of therapeutic agents from these nanostructures can be controlled using internal and external triggers, including pH, enzymes, redox, temperature, magnetic and electromagnetic waves, and ultrasound. Ultrasound is an attractive modality because it is non-invasive, can be focused on the diseased site, and has a synergistic effect with anticancer drugs. CONCLUSION The functionalization of micellar and liposomal surfaces with targeting moieties and the use of ultrasound as a triggering mechanism can help improve the selectivity and enable the spatiotemporal control of drug release from nanocarriers.
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Affiliation(s)
- Debasmita Mukhopadhyay
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Catherine Sano
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA, United States
| | - Nour AlSawaftah
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Raafat El-Awady
- College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
| | - Ghaleb A Husseini
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Vinod Paul
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
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Döring K, Sperling S, Ninkovic M, Gasimov T, Stadelmann C, Streit F, Binder L, Rohde V, Malinova V. Ultrasound-induced release of nimodipine from drug-loaded block copolymers: In vitro analysis. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Ultrasound-Enabled Therapeutic Delivery and Regenerative Medicine: Physical and Biological Perspectives. ACS Biomater Sci Eng 2021; 7:4371-4387. [PMID: 34460238 DOI: 10.1021/acsbiomaterials.1c00276] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The role of ultrasound in medicine and biological sciences is expanding rapidly beyond its use in conventional diagnostic imaging. Numerous studies have reported the effects of ultrasound on cellular and tissue physiology. Advances in instrumentation and electronics have enabled successful in vivo applications of therapeutic ultrasound. Despite path breaking advances in understanding the biophysical and biological mechanisms at both microscopic and macroscopic scales, there remain substantial gaps. With the progression of research in this area, it is important to take stock of the current understanding of the field and to highlight important areas for future work. We present herein key developments in the biological applications of ultrasound especially in the context of nanoparticle delivery, drug delivery, and regenerative medicine. We conclude with a brief perspective on the current promise, limitations, and future directions for interfacing ultrasound technology with biological systems, which could provide guidance for future investigations in this interdisciplinary area.
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Jayasree A, Ivanovski S, Gulati K. ON or OFF: Triggered therapies from anodized nano-engineered titanium implants. J Control Release 2021; 333:521-535. [DOI: 10.1016/j.jconrel.2021.03.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 12/13/2022]
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Aresteanu RNS, Borodetsky A, Azhari H, Weitz IS. Ultrasound-induced and MRI-monitored CuO nanoparticles release from micelle encapsulation. NANOTECHNOLOGY 2021; 32:055705. [PMID: 33059339 DOI: 10.1088/1361-6528/abc1a1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Copper oxide nanoparticles (CuO NPs) have anticancer and antimicrobial activities. Moreover, they have a contrast enhancing effect in both MRI and ultrasound. Nonetheless, encapsulation is needed to control their toxic side effects and a mechanism for release on demand is required. A methodology is introduced herein for encapsulating and releasing CuO NPs from micelles by ultrasound induced hyperthermia and monitoring the process by MRI. For this aim, CuO NPs loaded poly(ethylene glycol)-block-poly(D,L-lactic acid) (PEG-b-PLA) micelles were prepared. Then, the profile of copper release with application of ultrasound was examined as a function of time and temperature using a colorimetric method. Finally, T1 weighted MRI images of suspensions and ex vivo poultry liver samples containing the CuO NPs loaded micelles were acquired before and after ultrasound application. The results confirmed that: (i) encapsulated NPs are detectible by MRI T1 mapping, depicting substantial T1 shortening from 1872 ± 62 ms to 683 ± 20 ms. (ii) Ultrasonic hyperthermia stimulated the NPs release with an about threefold increase compared to non-treated samples. (iii) Releasing effect was clearly visible by T1-weighted imaging (mean signal increase ratio of 2.29). These findings can potentially lead to the development of a new noninvasive methodology for CuO NPs based theranostic process.
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Affiliation(s)
| | | | - Haim Azhari
- Department of Biomedical Engineering, Technion-Israel Institute of Technology, Israel
| | - Iris S Weitz
- Department of Biotechnology Engineering, ORT Braude College, Israel
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Cai X, Jiang Y, Lin M, Zhang J, Guo H, Yang F, Leung W, Xu C. Ultrasound-Responsive Materials for Drug/Gene Delivery. Front Pharmacol 2020; 10:1650. [PMID: 32082157 PMCID: PMC7005489 DOI: 10.3389/fphar.2019.01650] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/16/2019] [Indexed: 12/15/2022] Open
Abstract
Ultrasound is one of the most commonly used methods in the diagnosis and therapy of diseases due to its safety, deep penetration into tissue, and non-invasive nature. In the drug/gene delivery systems, ultrasound shows many advantages in terms of site-specific delivery and spatial release control of drugs/genes and attracts increasing attention. Microbubbles are the most well-known ultrasound-responsive delivery materials. Recently, nanobubbles, droplets, micelles, and nanoliposomes have been developed as novel carriers in this field. Herein, we review advances of novel ultrasound-responsive materials (nanobubbles, droplets, micelles and nanoliposomes) and discuss the challenges of ultrasound-responsive materials in delivery systems to boost the development of ultrasound-responsive materials as delivery carriers.
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Affiliation(s)
- Xiaowen Cai
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yuan Jiang
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Mei Lin
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jiyong Zhang
- Department of Pediatrics, Shenzhen Maternity and Child Health Care Hospital, Shenzhen, China
| | - Huanhuan Guo
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Fanwen Yang
- Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Wingnang Leung
- Asia-Pacific Institute of Aging Studies, Lingnan University, Tuen Mun, Hong Kong, Hong Kong
| | - Chuanshan Xu
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
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12
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Duan L, Yang L, Jin J, Yang F, Liu D, Hu K, Wang Q, Yue Y, Gu N. Micro/nano-bubble-assisted ultrasound to enhance the EPR effect and potential theranostic applications. Theranostics 2020; 10:462-483. [PMID: 31903132 PMCID: PMC6929974 DOI: 10.7150/thno.37593] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 10/11/2019] [Indexed: 12/23/2022] Open
Abstract
Drug delivery for tumor theranostics involves the extensive use of the enhanced permeability and retention (EPR) effect. Previously, various types of nanomedicines have been demonstrated to accumulate in solid tumors via the EPR effect. However, EPR is a highly variable phenomenon because of tumor heterogeneity, resulting in low drug delivery efficacy in clinical trials. Because ultrasonication using micro/nanobubbles as contrast agents can disrupt blood vessels and enhance the specific delivery of drugs, it is an effective approach to improve the EPR effect for the passive targeting of tumors. In this review, the basic thermal effect, acoustic streaming, and cavitation mechanisms of ultrasound, which are characteristics that can be utilized to enhance the EPR effect, are briefly introduced. Second, micro/nanobubble-enhanced ultrasound imaging is discussed to understand the validity and variability of the EPR effect. Third, because the tumor microenvironment is complicated owing to elevated interstitial fluid pressure and the deregulated extracellular matrix components, which may be unfavorable for the EPR effect, few new trends in smart bubble drug delivery systems, which may improve the accuracy of EPR-mediated passive drug targeting, are summarized. Finally, the challenging and major concerns that should be considered in the next generation of micro/nanobubble-contrast-enhanced ultrasound theranostics for EPR-mediated passive drug targeting are also discussed.
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Affiliation(s)
- Lei Duan
- School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, P. R. China
| | - Li Yang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Juan Jin
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Fang Yang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Dong Liu
- West Anhui University, Lu'an, P.R. China
- Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, P. R. China
| | - Ke Hu
- School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, P. R. China
| | - Qinxin Wang
- School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, P. R. China
| | - Yuanbin Yue
- School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, P. R. China
| | - Ning Gu
- School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, 211166, P. R. China
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, P. R. China
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13
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Salgarella AR, Zahoranová A, Šrámková P, Majerčíková M, Pavlova E, Luxenhofer R, Kronek J, Lacík I, Ricotti L. Investigation of drug release modulation from poly(2-oxazoline) micelles through ultrasound. Sci Rep 2018; 8:9893. [PMID: 29967422 PMCID: PMC6028437 DOI: 10.1038/s41598-018-28140-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/12/2018] [Indexed: 01/21/2023] Open
Abstract
Among external stimuli used to trigger release of a drug from a polymeric carrier, ultrasound has gained increasing attention due to its non-invasive nature, safety and low cost. Despite this attention, there is only limited knowledge about how materials available for the preparation of drug carriers respond to ultrasound. This study investigates the effect of ultrasound on the release of a hydrophobic drug, dexamethasone, from poly(2-oxazoline)-based micelles. Spontaneous and ultrasound-mediated release of dexamethasone from five types of micelles made of poly(2-oxazoline) block copolymers, composed of hydrophilic poly(2-methyl-2-oxazoline) and hydrophobic poly(2-n-propyl-2-oxazoline) or poly(2-butyl-2-oxazoline-co-2-(3-butenyl)-2-oxazoline), was studied. The release profiles were fitted by zero-order and Ritger-Peppas models. The ultrasound increased the amount of released dexamethasone by 6% to 105% depending on the type of copolymer, the amount of loaded dexamethasone, and the stimulation time point. This study investigates for the first time the interaction between different poly(2-oxazoline)-based micelle formulations and ultrasound waves, quantifying the efficacy of such stimulation in modulating dexamethasone release from these nanocarriers.
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Affiliation(s)
- Alice Rita Salgarella
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale R. Piaggio 34, 56025, Pontedera (Pisa), Italy
| | - Anna Zahoranová
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia
| | - Petra Šrámková
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia
| | - Monika Majerčíková
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia
- Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Ewa Pavlova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06, Prague 6, Czech Republic
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Chemical Technology of Materials Synthesis, University of Würzburg, Röntgenring 11, 97070, Würzburg, Germany
| | - Juraj Kronek
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia
| | - Igor Lacík
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41, Bratislava, Slovakia
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale R. Piaggio 34, 56025, Pontedera (Pisa), Italy.
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Salkho NM, Paul V, Kawak P, Vitor RF, Martins AM, Al Sayah M, Husseini GA. Ultrasonically controlled estrone-modified liposomes for estrogen-positive breast cancer therapy. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:462-472. [DOI: 10.1080/21691401.2018.1459634] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Najla M. Salkho
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Vinod Paul
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Pierre Kawak
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Rute F. Vitor
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
| | - Ana M. Martins
- California Institute for Quantitative Biosciences, Berkeley, CA, USA
| | - Mohammad Al Sayah
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
| | - Ghaleb A. Husseini
- Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates
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15
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Tsao NH, Hall EAH. Enzyme-Degradable Hybrid Polymer/Silica Microbubbles as Ultrasound Contrast Agents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6534-6543. [PMID: 27245495 DOI: 10.1021/acs.langmuir.6b01075] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The fabrication of an enzyme-degradable polymer/silica hybrid microbubble is reported that produces an ultrasound contrast image. The polymer, a triethoxysilane end-capped polycaprolactone (SiPCL), is used to incorporate enzyme-degradable components into a silica microbubble synthesis, and to impart increased elasticity for enhanced acoustic responsiveness. Formulations of 75, 85, and 95 wt % SiPCL in the polymer feed produced quite similar ratios of SiPCL and silica in the final bubble but different surface properties. The data suggest that different regions of the microbubbles were SiPCL-rich: the inner layer next to the polystyrene template core and the outer surface layer, thereby creating a sandwiched silica-rich layer of the bubble shell. Overall, the thickness of the microbubble shell was dependent on the starting TEOS concentration and the reaction time. Despite the layered structure, the microbubble could be efficiently degraded by lipase enzyme, but was stable without enzyme. The ultrasound contrast showed a general trend of increase in image intensity with SiPCL feed ratio, although the 95 wt % SiPCL bubbles did not produce a contrast image, probably due to bubble collapse. At higher normalized peak negative acoustic pressure (mechanical index, MI), a nonlinear frequency response also emerges, characterized by the third harmonic at around 3f0, and increases with MI. The threshold MI transition from linear to nonlinear response increased with decrease in SiPCL.
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Affiliation(s)
- Nadia H Tsao
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge , Tennis Court Road, Cambridge CB2 1QT, United Kingdom
| | - Elizabeth A H Hall
- Institute of Biotechnology, Department of Chemical Engineering and Biotechnology, University of Cambridge , Tennis Court Road, Cambridge CB2 1QT, United Kingdom
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16
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Drug-Loaded Perfluorocarbon Nanodroplets for Ultrasound-Mediated Drug Delivery. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 880:221-41. [DOI: 10.1007/978-3-319-22536-4_13] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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17
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Boyer C, Corrigan NA, Jung K, Nguyen D, Nguyen TK, Adnan NNM, Oliver S, Shanmugam S, Yeow J. Copper-Mediated Living Radical Polymerization (Atom Transfer Radical Polymerization and Copper(0) Mediated Polymerization): From Fundamentals to Bioapplications. Chem Rev 2015; 116:1803-949. [DOI: 10.1021/acs.chemrev.5b00396] [Citation(s) in RCA: 356] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cyrille Boyer
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Nathaniel Alan Corrigan
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Kenward Jung
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Diep Nguyen
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Thuy-Khanh Nguyen
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Nik Nik M. Adnan
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Susan Oliver
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Sivaprakash Shanmugam
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Jonathan Yeow
- Australian Centre for Nanomedicine, and ‡Centre for Advanced
Macromolecular
Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
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18
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Integration of imaging into clinical practice to assess the delivery and performance of macromolecular and nanotechnology-based oncology therapies. J Control Release 2015; 219:295-312. [PMID: 26403800 DOI: 10.1016/j.jconrel.2015.09.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/19/2015] [Accepted: 09/19/2015] [Indexed: 01/02/2023]
Abstract
Functional and molecular imaging has become increasingly used to evaluate interpatient and intrapatient tumor heterogeneity. Imaging allows for assessment of microenvironment parameters including tumor hypoxia, perfusion and proliferation, as well as tumor metabolism and the intratumoral distribution of specific molecular markers. Imaging information may be used to stratify patients for targeted therapies, and to define patient populations that may benefit from alternative therapeutic approaches. It also provides a method for non-invasive monitoring of treatment response at earlier time-points than traditional cues, such as tumor shrinkage. Further, companion diagnostic imaging techniques are becoming progressively more important for development and clinical implementation of targeted therapies. Imaging-based companion diagnostics are likely to be essential for the validation and FDA approval of targeted nanotherapies and macromolecular medicines. This review describes recent clinical advances in the use of functional and molecular imaging to evaluate the tumor microenvironment. Additionally, this article focuses on image-based assessment of distribution and anti-tumor effect of nano- and macromolecular systems.
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Oliva N, Unterman S, Zhang Y, Conde J, Song HS, Artzi N. Personalizing Biomaterials for Precision Nanomedicine Considering the Local Tissue Microenvironment. Adv Healthc Mater 2015; 4:1584-99. [PMID: 25963621 DOI: 10.1002/adhm.201400778] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 02/02/2015] [Indexed: 12/11/2022]
Abstract
New advances in (nano)biomaterial design coupled with the detailed study of tissue-biomaterial interactions can open a new chapter in personalized medicine, where biomaterials are chosen and designed to match specific tissue types and disease states. The notion of a "one size fits all" biomaterial no longer exists, as growing evidence points to the value of customizing material design to enhance (pre)clinical performance. The complex microenvironment in vivo at different tissue sites exhibits diverse cell types, tissue chemistry, tissue morphology, and mechanical stresses that are further altered by local pathology. This complex and dynamic environment may alter the implanted material's properties and in turn affect its in vivo performance. It is crucial, therefore, to carefully study tissue context and optimize biomaterials considering the implantation conditions. This practice would enable attaining predictable material performance and enhance clinical outcomes.
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Affiliation(s)
- Nuria Oliva
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
| | - Shimon Unterman
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
| | - Yi Zhang
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
| | - João Conde
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
- School of Engineering and Materials Science; Queen Mary University of London; London UK
| | - Hyun Seok Song
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
| | - Natalie Artzi
- Massachusetts Institute of Technology; Institute for Medical Engineering and Science; Harvard-MIT Division for Health Sciences and Technology; E25-449 Cambridge MA USA
- Department of Anesthesiology; Brigham and Women's Hospital; Harvard Medical School; Boston MA 02115 USA
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20
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Topete A, Barbosa S, Taboada P. Intelligent micellar polymeric nanocarriers for therapeutics and diagnosis. J Appl Polym Sci 2015. [DOI: 10.1002/app.42650] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología; Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara; 44340 Guadalajara Jalisco Mexico
| | - Silvia Barbosa
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada; Universidad de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Pablo Taboada
- Grupo de Física de Coloides y Polímeros, Departamento de Física de la Materia Condensada; Universidad de Santiago de Compostela; 15782 Santiago de Compostela Spain
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Gupta R, Shea J, Scafe C, Shurlygina A, Rapoport N. Polymeric micelles and nanoemulsions as drug carriers: Therapeutic efficacy, toxicity, and drug resistance. J Control Release 2015; 212:70-7. [PMID: 26091919 DOI: 10.1016/j.jconrel.2015.06.019] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 06/10/2015] [Accepted: 06/14/2015] [Indexed: 01/26/2023]
Abstract
The manuscript reports the side-by-side comparison of therapeutic properties of polymeric micelles and nanoemulsions generated from micelles. The effect of the structure of a hydrophobic block of block copolymer on the therapeutic efficacy, tumor recurrence, and development of drug resistance was studied in pancreatic tumor bearing mice. Mice were treated with paclitaxel (PTX) loaded poly(ethylene oxide)-co-polylactide micelles or corresponding perfluorocarbon nanoemulsions. Two structures of the polylactide block differing in a physical state of micelle cores or corresponding nanodroplet shells were compared. Poly(ethylene oxide)-co-poly(d,l-lactide) (PEG-PDLA) formed micelles with elastic amorphous cores while poly(ethylene oxide)-co-poly(l-lactide) (PEG-PLLA) formed micelles with solid crystalline cores. Micelles and nanoemulsions stabilized with PEG-PDLA copolymer manifested higher therapeutic efficacy than those formed with PEG-PLLA copolymer studied earlier. Better performance of PEG-PDLA micelles and nanodroplets was attributed to the elastic physical state of micelle cores (or droplet shells) allowing adequate rate of drug release via drug diffusion and/or copolymer biodegradation. The biodegradation of PEG-PDLA stabilized nanoemulsions was monitored by the ultrasonography of nanodroplets injected directly into the tumor; the PEG-PDLA stabilized nanodroplets disappeared from the injection site within 48h. In contrast, nanodroplets stabilized with PEG-PLLA copolymer were preserved at the injection site for weeks and months indicating extremely slow biodegradation of solid PLLA blocks. Multiple injections of PTX-loaded PEG-PDLA micelles or nanoemulsions to pancreatic tumor bearing mice resulted in complete tumor resolution. Two of ten tumors treated with either PEG-PDLA micellar or nanoemulsion formulation recurred after the completion of treatment but proved sensitive to the second treatment cycle indicating that drug resistance has not been developed. This is in contrast to the treatment with PEG-PLLA micelles or nanoemulsions where all resolved tumors quickly recurred after the completion of treatment and proved resistant to the repeated treatment. The prevention of drug resistance in tumors treated with PEG-PDLA stabilized formulations was attributed to the presence and preventive effect of copolymer unimers that were in equilibrium with PEG-PDLA micelles. PEG-PDLA stabilized nanoemulsions manifested lower hematological toxicity than corresponding micelles suggesting higher drug retention in circulation. Summarizing, micelles with elastic cores appear preferable to those with solid cores as drug carriers. Micelles with elastic cores and corresponding nanoemulsions both manifest high therapeutic efficacy, with nanoemulsions exerting lower systemic toxicity than micelles. The presence of a small fraction of micelles with elastic cores in nanoemulsion formulations is desirable for prevention of the development of drug resistance.
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Affiliation(s)
- Roohi Gupta
- Department of Bioengineering, University of Utah, United States
| | - Jill Shea
- Department of Surgery, University of Utah, United States
| | - Courtney Scafe
- Department of Surgery, University of Utah, United States
| | - Anna Shurlygina
- Institute of Physiology and Fundamental Medicine, Russian Academy of Medical Sciences, Siberian Branch, Russia
| | - Natalya Rapoport
- Department of Bioengineering, University of Utah, United States.
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Wood AKW, Sehgal CM. A review of low-intensity ultrasound for cancer therapy. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:905-28. [PMID: 25728459 PMCID: PMC4362523 DOI: 10.1016/j.ultrasmedbio.2014.11.019] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 11/13/2014] [Accepted: 11/24/2014] [Indexed: 05/05/2023]
Abstract
The literature describing the use of low-intensity ultrasound in four major areas of cancer therapy-sonodynamic therapy, ultrasound-mediated chemotherapy, ultrasound-mediated gene delivery and anti-vascular ultrasound therapy-was reviewed. Each technique consistently resulted in the death of cancer cells, and the bio-effects of ultrasound were attributed primarily to thermal actions and inertial cavitation. In each therapeutic modality, theranostic contrast agents composed of microbubbles played a role in both therapy and vascular imaging. The development of these agents is important as it establishes a therapeutic-diagnostic platform that can monitor the success of anti-cancer therapy. Little attention, however, has been given either to the direct assessment of the mechanisms underlying the observed bio-effects or to the viability of these therapies in naturally occurring cancers in larger mammals; if such investigations provided encouraging data, there could be prompt application of a therapy technique in the treatment of cancer patients.
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Affiliation(s)
- Andrew K W Wood
- Department Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Chandra M Sehgal
- Department of Radiology, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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23
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Polymeric micelles and nanoemulsions as tumor-targeted drug carriers: Insight through intravital imaging. J Control Release 2015; 206:153-60. [PMID: 25776738 DOI: 10.1016/j.jconrel.2015.03.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/04/2015] [Accepted: 03/09/2015] [Indexed: 11/21/2022]
Abstract
Intravital imaging of nanoparticle extravasation and tumor accumulation has revealed, for the first time, detailed features of carrier and drug behavior in circulation and tissue that suggest new directions for optimization of drug nanocarriers. Using intravital fluorescent microscopy, the extent of the extravasation, diffusion in the tissue, internalization by tissue cells, and uptake by the RES system were studied for polymeric micelles, nanoemulsions, and nanoemulsion-encapsulated drug. Discrimination of vascular and tissue compartments in the processes of micelle and nanodroplet extravasation and tissue accumulation was possible. A simple 1-D continuum model was suggested that allowed discriminating between various kinetic regimes of nanocarrier (or released drug) internalization in tumors of various sizes and cell density. The extravasation and tumor cell internalization occurred much faster for polymeric micelles than for nanoemulsion droplets. Fast micelle internalization resulted in the formation of a perivascular fluorescent coating around blood vessels. A new mechanism of micelle extravasation and internalization was suggested, based on the fast extravasation and internalization rates of copolymer unimers while maintaining micelle/unimer equilibrium in the circulation. The data suggested that to be therapeutically effective, nanoparticles with high internalization rate should manifest fast diffusion in the tumor tissue in order to avoid generation of concentration gradients that induce drug resistance. However an extra-fast diffusion should be avoided as it may result in the flow of extravasated nanoparticles from the tumor to normal organs, which would compromise targeting efficiency. The extravasation kinetics were different for nanodroplets and nanodroplet-encapsulated drug F-PTX suggesting a premature release of some fraction of the drug from the carrier. In conclusion, the development of an "ideal" drug carrier should involve the optimization of both drug retention and carrier diffusion parameters.
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Jeon YW, Cho SH, Han HD, Shin BC. Drug Release from Thermosensitive Liposomes by High-Intensity Focused Ultrasound. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2014. [DOI: 10.5012/jkcs.2014.58.6.575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Liu J, Debuigne A, Detrembleur C, Jérôme C. Poly(N-vinylcaprolactam): a thermoresponsive macromolecule with promising future in biomedical field. Adv Healthc Mater 2014; 3:1941-68. [PMID: 25354338 DOI: 10.1002/adhm.201400371] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/17/2014] [Indexed: 11/06/2022]
Abstract
Poly(N-vinylcaprolactam) (PNVCL) is a thermoresponsive and biocompatible polymer that raises an increasing interest in the biomedical area, especially in drug delivery systems (DDS) that include micelles, hydrogels, and hybrid particles. The thermoresponsiveness of PNVCL, used alone or in combination with other stimuli- responsive polymers or particles (pH, magnetic field, or chemicals), is often key in the loading and/or release process in these DDS. The renewed focus on this polymer, which is known for decades, is to a large extent due to recent progress in synthetic strategies. Especially, the advent of efficient controlled radical polymerization (CRP) methods for NVCL monomer gives now access to unprecedented well-defined NVCL-based copolymers with unique properties. This Review article addresses up-to-date synthetic aspects, biological features, and biomedical applications of the latest NVCL-containing systems.
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Affiliation(s)
- Ji Liu
- Center for Education and Research on Macromolecules (CERM); University of Liege (ULg); Sart-Tilman B6A B-4000 Liege Belgium
| | - Antoine Debuigne
- Center for Education and Research on Macromolecules (CERM); University of Liege (ULg); Sart-Tilman B6A B-4000 Liege Belgium
| | - Christophe Detrembleur
- Center for Education and Research on Macromolecules (CERM); University of Liege (ULg); Sart-Tilman B6A B-4000 Liege Belgium
| | - Christine Jérôme
- Center for Education and Research on Macromolecules (CERM); University of Liege (ULg); Sart-Tilman B6A B-4000 Liege Belgium
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Nanodrug-enhanced radiofrequency tumor ablation: effect of micellar or liposomal carrier on drug delivery and treatment efficacy. PLoS One 2014; 9:e102727. [PMID: 25133740 PMCID: PMC4136708 DOI: 10.1371/journal.pone.0102727] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 06/21/2014] [Indexed: 01/13/2023] Open
Abstract
PURPOSE To determine the effect of different drug-loaded nanocarriers (micelles and liposomes) on delivery and treatment efficacy for radiofrequency ablation (RFA) combined with nanodrugs. MATERIALS/METHODS Fischer 344 rats were used (n = 196). First, single subcutaneous R3230 tumors or normal liver underwent RFA followed by immediate administration of i.v. fluorescent beads (20, 100, and 500 nm), with fluorescent intensity measured at 4-24 hr. Next, to study carrier type on drug efficiency, RFA was combined with micellar (20 nm) or liposomal (100 nm) preparations of doxorubicin (Dox; targeting HIF-1α) or quercetin (Qu; targeting HSP70). Animals received RFA alone, RFA with Lipo-Dox or Mic-Dox (1 mg i.v., 15 min post-RFA), and RFA with Lipo-Qu or Mic-Qu given 24 hr pre- or 15 min post-RFA (0.3 mg i.v.). Tumor coagulation and HIF-1α or HSP70 expression were assessed 24 hr post-RFA. Third, the effect of RFA combined with i.v. Lipo-Dox, Mic-Dox, Lipo-Qu, or Mic-Qu (15 min post-RFA) compared to RFA alone on tumor growth and animal endpoint survival was evaluated. Finally, drug uptake was compared between RFA/Lipo-Dox and RFA/Mic-Dox at 4-72 hr. RESULTS Smaller 20 nm beads had greater deposition and deeper tissue penetration in both tumor (100 nm/500 nm) and liver (100 nm) (p<0.05). Mic-Dox and Mic-Qu suppressed periablational HIF-1α or HSP70 rim thickness more than liposomal preparations (p<0.05). RFA/Mic-Dox had greater early (4 hr) intratumoral doxorubicin, but RFA/Lipo-Dox had progressively higher intratumoral doxorubicin at 24-72 hr post-RFA (p<0.04). No difference in tumor growth and survival was seen between RFA/Lipo-Qu and RFA/Mic-Qu. Yet, RFA/Lipo-Dox led to greater animal endpoint survival compared to RFA/Mic-Dox (p<0.03). CONCLUSION With RF ablation, smaller particle micelles have superior penetration and more effective local molecular modulation. However, larger long-circulating liposomal carriers can result in greater intratumoral drug accumulation over time and reduced tumor growth. Accordingly, different carriers provide specific advantages, which should be considered when formulating optimal combination therapies.
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Bennett KM, Jo JI, Cabral H, Bakalova R, Aoki I. MR imaging techniques for nano-pathophysiology and theranostics. Adv Drug Deliv Rev 2014; 74:75-94. [PMID: 24787226 DOI: 10.1016/j.addr.2014.04.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 03/02/2014] [Accepted: 04/20/2014] [Indexed: 11/25/2022]
Abstract
The advent of nanoparticle DDSs (drug delivery systems, nano-DDSs) is opening new pathways to understanding physiology and pathophysiology at the nanometer scale. A nano-DDS can be used to deliver higher local concentrations of drugs to a target region and magnify therapeutic effects. However, interstitial cells or fibrosis in intractable tumors, as occurs in pancreatic or scirrhous stomach cancer, tend to impede nanoparticle delivery. Thus, it is critical to optimize the type and size of nanoparticles to reach the target. High-resolution 3D imaging provides a means of "seeing" the nanoparticle distribution and therapeutic effects. We introduce the concept of "nano-pathophysiological imaging" as a strategy for theranostics. The strategy consists of selecting an appropriate nano-DDS and rapidly evaluating drug effects in vivo to guide the next round of therapy. In this article we classify nano-DDSs by component carrier materials and present an overview of the significance of nano-pathophysiological MRI.
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28
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Sirsi SR, Borden MA. State-of-the-art materials for ultrasound-triggered drug delivery. Adv Drug Deliv Rev 2014; 72:3-14. [PMID: 24389162 DOI: 10.1016/j.addr.2013.12.010] [Citation(s) in RCA: 305] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 12/08/2013] [Accepted: 12/19/2013] [Indexed: 12/18/2022]
Abstract
Ultrasound is a unique and exciting theranostic modality that can be used to track drug carriers, trigger drug release and improve drug deposition with high spatial precision. In this review, we briefly describe the mechanisms of interaction between drug carriers and ultrasound waves, including cavitation, streaming and hyperthermia, and how those interactions can promote drug release and tissue uptake. We then discuss the rational design of some state-of-the-art materials for ultrasound-triggered drug delivery and review recent progress for each drug carrier, focusing on the delivery of chemotherapeutic agents such as doxorubicin. These materials include nanocarrier formulations, such as liposomes and micelles, designed specifically for ultrasound-triggered drug release, as well as microbubbles, microbubble-nanocarrier hybrids, microbubble-seeded hydrogels and phase-change agents.
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Affiliation(s)
- Shashank R Sirsi
- Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA
| | - Mark A Borden
- Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA; Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309, USA.
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29
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Lakshmanan S, Gupta GK, Avci P, Chandran R, Sadasivam M, Jorge AES, Hamblin MR. Physical energy for drug delivery; poration, concentration and activation. Adv Drug Deliv Rev 2014; 71:98-114. [PMID: 23751778 DOI: 10.1016/j.addr.2013.05.010] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 05/15/2013] [Accepted: 05/31/2013] [Indexed: 12/11/2022]
Abstract
Techniques for controlling the rate and duration of drug delivery, while targeting specific locations of the body for treatment, to deliver the cargo (drugs or DNA) to particular parts of the body by what are becoming called "smart drug carriers" have gained increased attention during recent years. Using such smart carriers, researchers have also been investigating a number of physical energy forces including: magnetic fields, ultrasound, electric fields, temperature gradients, photoactivation or photorelease mechanisms, and mechanical forces to enhance drug delivery within the targeted cells or tissues and also to activate the drugs using a similar or a different type of external trigger. This review aims to cover a number of such physical energy modalities. Various advanced techniques such as magnetoporation, electroporation, iontophoresis, sonoporation/mechnoporation, phonophoresis, optoporation and thermoporation will be covered in the review. Special emphasis will be placed on photodynamic therapy owing to the experience of the authors' laboratory in this area, but other types of drug cargo and DNA vectors will also be covered. Photothermal therapy and theranostics will also be discussed.
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30
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Jhaveri AM, Torchilin VP. Multifunctional polymeric micelles for delivery of drugs and siRNA. Front Pharmacol 2014; 5:77. [PMID: 24795633 PMCID: PMC4007015 DOI: 10.3389/fphar.2014.00077] [Citation(s) in RCA: 257] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 03/31/2014] [Indexed: 12/18/2022] Open
Abstract
Polymeric micelles, self-assembling nano-constructs of amphiphilic copolymers with a core-shell structure have been used as versatile carriers for delivery of drugs as well as nucleic acids. They have gained immense popularity owing to a host of favorable properties including their capacity to effectively solubilize a variety of poorly soluble pharmaceutical agents, biocompatibility, longevity, high stability in vitro and in vivo and the ability to accumulate in pathological areas with compromised vasculature. Moreover, additional functions can be imparted to these micelles by engineering their surface with various ligands and cell-penetrating moieties to allow for specific targeting and intracellular accumulation, respectively, to load them with contrast agents to confer imaging capabilities, and incorporating stimuli-sensitive groups that allow drug release in response to small changes in the environment. Recently, there has been an increasing trend toward designing polymeric micelles which integrate a number of the above functions into a single carrier to give rise to “smart,” multifunctional polymeric micelles. Such multifunctional micelles can be envisaged as key to improving the efficacy of current treatments which have seen a steady increase not only in hydrophobic small molecules, but also in biologics including therapeutic genes, antibodies and small interfering RNA (siRNA). The purpose of this review is to highlight recent advances in the development of multifunctional polymeric micelles specifically for delivery of drugs and siRNA. In spite of the tremendous potential of siRNA, its translation into clinics has been a significant challenge because of physiological barriers to its effective delivery and the lack of safe, effective and clinically suitable vehicles. To that end, we also discuss the potential and suitability of multifunctional polymeric micelles, including lipid-based micelles, as promising vehicles for both siRNA and drugs.
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Affiliation(s)
- Aditi M Jhaveri
- Department of Pharmaceutical Sciences, Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University Boston, MA, USA
| | - Vladimir P Torchilin
- Department of Pharmaceutical Sciences, Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University Boston, MA, USA
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Zhang X, Zheng Y, Wang Z, Huang S, Chen Y, Jiang W, Zhang H, Ding M, Li Q, Xiao X, Luo X, Wang Z, Qi H. Methotrexate-loaded PLGA nanobubbles for ultrasound imaging and Synergistic Targeted therapy of residual tumor during HIFU ablation. Biomaterials 2014; 35:5148-61. [PMID: 24680663 DOI: 10.1016/j.biomaterials.2014.02.036] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 02/20/2014] [Indexed: 11/25/2022]
Abstract
High intensity focused ultrasound (HIFU) has attracted the great attention in tumor ablation due to its non-invasive, efficient and economic features. However, HIFU ablation has its intrinsic limitations for removing the residual tumor cells, thus the tumor recurrence and metastasis cannot be avoided in this case. Herein, we developed a multifunctional targeted poly(lactic-co-glycolic acid) (PLGA) nanobubbles (NBs), which not only function as an efficient ultrasound contrast agent for tumor imaging, but also a targeted anticancer drug carrier and excellent synergistic agent for enhancing the therapeutic efficiency of HIFU ablation. Methotrexate (MTX)-loaded NBs were synthesized and filled with perfluorocarbon gas subsequently using a facile but general double emulsion evaporation method. The active tumor-targeting monoclonal anti-HLA-G antibodies (mAbHLA-G) were further conjugated onto the surface of nanobubbles. The mAbHLA-G/MTX/PLGA NBs could enhance the ultrasound imaging both in vitro and in vivo, and the targeting efficiency to HLA-G overexpressing JEG-3 cells has been demonstrated. The elaborately designed mAbHLA-G/MTX/PLGA NBs can specifically target to the tumor cells both in vitro and in vivo, and their blood circulation time in vivo was much longer than non-targeted MTX/PLGA NBs. Further therapeutic evaluations showed that the targeted NBs as a synergistic agent can significantly improve the efficiency of HIFU ablation by changing the acoustic environment, and the focused ultrasound can promote the on-demand MTX release both in vitro and in vivo. The in vivo histopathology test and immunohistochemical analysis showed that the mAbHLA-G/MTX/PLGA NBs plus HIFU group presented most serious coagulative necrosis, the lowest proliferation index and the highest apoptotic index. Therefore, the successful introduction of targeted mAbHLA-G/MTX/PLGA NBs provides an excellent platform for the highly efficient, imaging-guided and non-invasive HIFU synergistic therapy of cancer with the supplementary functions of killing residual tumor cells and preventing tumor recurrence/metastasis.
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Affiliation(s)
- Xuemei Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Yuanyi Zheng
- Institution of Ultrasound Imaging, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, PR China.
| | - Zhigang Wang
- Institution of Ultrasound Imaging, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, PR China
| | - Shuai Huang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Yu Chen
- State Laboratory of High Performance Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China
| | - Wei Jiang
- Department of Orthopaedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Hua Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Mingxia Ding
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Qingshu Li
- Department of Pathology, Chongqing Medical University, Chongqing 400016, PR China
| | - Xiaoqiu Xiao
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Xin Luo
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Zhibiao Wang
- College of Biomedical Engineering, Chongqing Medical University, Chongqing 400016, PR China
| | - Hongbo Qi
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
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Zhou Y. Ultrasound-mediated drug/gene delivery in solid tumor treatment. JOURNAL OF HEALTHCARE ENGINEERING 2013; 4:223-54. [PMID: 23778013 DOI: 10.1260/2040-2295.4.2.223] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Ultrasound is an emerging modality for drug delivery in chemotherapy. This paper reviews this novel technology by first introducing the designs and characteristics of three classes of drug/gene vehicles, microbubble (including nanoemulsion), liposomes, and micelles. In comparison to conventional free drug, the targeted drug-release and delivery through vessel wall and interstitial space to cancerous cells can be activated and enhanced under certain sonication conditions. In the acoustic field, there are several reactions of these drug vehicles, including hyperthermia, bubble cavitation, sonoporation, and sonodynamics, whose physical properties are illustrated for better understanding of this approach. In vitro and in vivo results are summarized, and future directions are discussed. Altogether, ultrasound-mediated drug/gene delivery under imaging guidance provides a promising option in cancer treatment with enhanced agent release and site specificity and reduced toxicity.
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Affiliation(s)
- Yufeng Zhou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
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Deckers R, Paradissis A, Oerlemans C, Talelli M, Storm G, Hennink WE, Nijsen JFW. New insights into the HIFU-triggered release from polymeric micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9483-9490. [PMID: 23837816 DOI: 10.1021/la400832h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Continuous wave (CW), low frequency, high intensity focused ultrasound (HIFU) is a promising modality to trigger release of active compounds from polymeric micelles. The aim of the present study was to investigate whether high frequency CW as well as pulsed wave (PW) HIFU can induce the release of a hydrophobic agent from non-cross-linked (NCL) and core cross-linked (CCL) poly(ethylene glycol)-b-poly[N-(2-hydroxypropyl) methacrylamide-lactate] (mPEG-b-p(HPMAm-Lac(n))) micelles. It was shown that high frequency CW as well as PW HIFU was able to trigger the release (up to 85%) of a hydrophobic compound (i.e., nile red, NR) from NCL and CCL micelles. No changes in size distribution of the micelles after CW and PW HIFU exposure were observed and no degradation of polymer chain had occurred. We therefore hypothesize that the polymeric micelles are temporally destabilized upon HIFU exposure due to radiation force induced shear forces, leading to NR release on demand.
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Affiliation(s)
- Roel Deckers
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands.
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Affiliation(s)
- Stéphanie Deshayes
- Department of Bioengineering; University of California; Los Angeles California 90095
| | - Andrea M. Kasko
- Department of Bioengineering; University of California; Los Angeles California 90095
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Oerlemans C, Deckers R, Storm G, Hennink WE, Nijsen JFW. Evidence for a new mechanism behind HIFU-triggered release from liposomes. J Control Release 2013; 168:327-33. [DOI: 10.1016/j.jconrel.2013.03.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 03/22/2013] [Accepted: 03/23/2013] [Indexed: 01/08/2023]
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MRI-Guided Focused Ultrasound as a New Method of Drug Delivery. JOURNAL OF DRUG DELIVERY 2013; 2013:616197. [PMID: 23738076 PMCID: PMC3666208 DOI: 10.1155/2013/616197] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Accepted: 02/05/2013] [Indexed: 02/01/2023]
Abstract
Ultrasound-mediated drug delivery under the guidance of an imaging modality can improve drug disposition and achieve site-specific drug delivery. The term focal drug delivery has been introduced to describe the focal targeting of drugs in tissues with the help of imaging and focused ultrasound. Focal drug delivery aims to improve the therapeutic profile of drugs by improving their specificity and their permeation in defined areas. Focused-ultrasound- (FUS-) mediated drug delivery has been applied with various molecules to improve their local distribution in tissues. FUS is applied with the aid of microbubbles to enhance the permeability of bioactive molecules across BBB and improve drug distribution in the brain. Recently, FUS has been utilised in combination with MRI-labelled liposomes that respond to temperature increase. This strategy aims to "activate" nanoparticles to release their cargo locally when triggered by hyperthermia induced by FUS. MRI-guided FUS drug delivery provides the opportunity to improve drug bioavailability locally and therefore improve the therapeutic profiles of drugs. This drug delivery strategy can be directly translated to clinic as MRg FUS is a promising clinically therapeutic approach. However, more basic research is required to understand the physiological mechanism of FUS-enhanced drug delivery.
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Sutton JT, Haworth KJ, Pyne-Geithman G, Holland CK. Ultrasound-mediated drug delivery for cardiovascular disease. Expert Opin Drug Deliv 2013; 10:573-92. [PMID: 23448121 DOI: 10.1517/17425247.2013.772578] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Ultrasound (US) has been developed as both a valuable diagnostic tool and a potent promoter of beneficial tissue bioeffects for the treatment of cardiovascular disease. These effects can be mediated by mechanical oscillations of circulating microbubbles, or US contrast agents, which may also encapsulate and shield a therapeutic agent in the bloodstream. Oscillating microbubbles can create stresses directly on nearby tissue or induce fluid effects that effect drug penetration into vascular tissue, lyse thrombi or direct drugs to optimal locations for delivery. AREAS COVERED The present review summarizes investigations that have provided evidence for US-mediated drug delivery as a potent method to deliver therapeutics to diseased tissue for cardiovascular treatment. In particular, the focus will be on investigations of specific aspects relating to US-mediated drug delivery, such as delivery vehicles, drug transport routes, biochemical mechanisms and molecular targeting strategies. EXPERT OPINION These investigations have spurred continued research into alternative therapeutic applications, such as bioactive gas delivery and new US technologies. Successful implementation of US-mediated drug delivery has the potential to change the way many drugs are administered systemically, resulting in more effective and economical therapeutics, and less-invasive treatments.
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Affiliation(s)
- Jonathan T Sutton
- University of Cincinnati, College of Medicine, Internal Medicine, Division of Cardiovascular Diseases, and Biomedical Engineering Program, Cincinnati, OH, USA
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Aw MS, Losic D. Ultrasound enhanced release of therapeutics from drug-releasing implants based on titania nanotube arrays. Int J Pharm 2013; 443:154-62. [DOI: 10.1016/j.ijpharm.2013.01.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 12/15/2012] [Accepted: 01/02/2013] [Indexed: 12/27/2022]
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Kaur G, Hearn MTW, Bell TDM, Saito K. Release Kinetics of 6-Mercaptopurine and 6-Thioguanine from Bioinspired Core-Crosslinked Thymine Functionalised Polymeric Micelles. Aust J Chem 2013. [DOI: 10.1071/ch13125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A bioinspired core-bound polymeric micellar system based on hydrogen bonding and photo-crosslinking of thymine has been prepared from the amphiphilic block copolymers, poly(vinylbenzylthymine)-block-poly(vinylbenzyltriethylammonium chloride). The chemical loading and controlled release potential of these micelles was investigated using two drugs, 6-mercaptopurine and 6-thioguanine. The release kinetics of drug-loaded polymeric micelles was determined by pressure ultrafiltration and the effects of hydrogen bonding, core-crosslinking, and core size on the loading capacity and release kinetics were analysed. The results demonstrate that drug release rates are affected by hydrogen bonding in the micelle core. Furthermore, these studies indicate that drug release rates can be controlled by changing the size of the core and by photo-crosslinking thymine groups in the core.
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Lukianova-Hleb EY, Ren X, Townley D, Wu X, Kupferman ME, Lapotko DO. Plasmonic nanobubbles rapidly detect and destroy drug-resistant tumors. Theranostics 2012; 2:976-87. [PMID: 23139725 PMCID: PMC3493199 DOI: 10.7150/thno.5116] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 09/22/2012] [Indexed: 12/28/2022] Open
Abstract
The resistance of residual cancer cells after oncological resection to adjuvant chemoradiotherapies results in both high recurrence rates and high non-specific tissue toxicity, thus preventing the successful treatment of such cancers as head and neck squamous cell carcinoma (HNSCC). The patients' survival rate and quality of life therefore depend upon the efficacy, selectivity and low non-specific toxicity of the adjuvant treatment. We report a novel, theranostic in vivo technology that unites both the acoustic diagnostics and guided intracellular delivery of anti-tumor drug (liposome-encapsulated doxorubicin, Doxil) in one rapid process, namely a pulsed laser-activated plasmonic nanobubble (PNB). HNSCC-bearing mice were treated with gold nanoparticle conjugates, Doxil, and single near-infrared laser pulses of low energy. Tumor-specific clusters of gold nanoparticles (solid gold spheres) converted the optical pulses into localized PNBs. The acoustic signals of the PNB detected the tumor with high specificity and sensitivity. The mechanical impact of the PNB, co-localized with Doxil liposomes, selectively ejected the drug into the cytoplasm of cancer cells. Cancer cell-specific generation of PNBs and their intracellular co-localization with Doxil improved the in vivo therapeutic efficacy from 5-7% for administration of only Doxil or PNBs alone to 90% thus demonstrating the synergistic therapeutic effect of the PNB-based intracellular drug release. This mechanism also reduced the non-specific toxicity of Doxil below a detectable level and the treatment time to less than one minute. Thus PNBs combine highly sensitive diagnosis, overcome drug resistance and minimize non-specific toxicity in a single rapid theranostic procedure for intra-operative treatment.
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