1
|
Duncan B, Al-Kassas R, Zhang G, Hughes D, Qiu Y. Ultrasound-Mediated Ocular Drug Delivery: From Physics and Instrumentation to Future Directions. MICROMACHINES 2023; 14:1575. [PMID: 37630111 PMCID: PMC10456754 DOI: 10.3390/mi14081575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023]
Abstract
Drug delivery to the anterior and posterior segments of the eye is impeded by anatomical and physiological barriers. Increasingly, the bioeffects produced by ultrasound are being proven effective for mitigating the impact of these barriers on ocular drug delivery, though there does not appear to be a consensus on the most appropriate system configuration and operating parameters for this application. In this review, the fundamental aspects of ultrasound physics most pertinent to drug delivery are presented; the primary phenomena responsible for increased drug delivery efficacy under ultrasound sonication are discussed; an overview of common ocular drug administration routes and the associated ocular barriers is also given before reviewing the current state of the art of ultrasound-mediated ocular drug delivery and its potential future directions.
Collapse
Affiliation(s)
- Blair Duncan
- School of Engineering, Faculty of Engineering & Technology, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK
| | - Raida Al-Kassas
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK
| | - Guangming Zhang
- School of Engineering, Faculty of Engineering & Technology, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK
| | - Dave Hughes
- Novosound Ltd., Biocity, BoNess Road, Newhouse, Glasgow ML1 5UH, UK
| | - Yongqiang Qiu
- School of Engineering, Faculty of Engineering & Technology, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK
| |
Collapse
|
2
|
Tumor Spheroids as Model to Design Acoustically Mediated Drug Therapies: A Review. Pharmaceutics 2023; 15:pharmaceutics15030806. [PMID: 36986667 PMCID: PMC10056013 DOI: 10.3390/pharmaceutics15030806] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/22/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Tumor spheroids as well as multicellular tumor spheroids (MCTSs) are promising 3D in vitro tumor models for drug screening, drug design, drug targeting, drug toxicity, and validation of drug delivery methods. These models partly reflect the tridimensional architecture of tumors, their heterogeneity and their microenvironment, which can alter the intratumoral biodistribution, pharmacokinetics, and pharmacodynamics of drugs. The present review first focuses on current spheroid formation methods and then on in vitro investigations exploiting spheroids and MCTS for designing and validating acoustically mediated drug therapies. We discuss the limitations of the current studies and future perspectives. Various spheroid formation methods enable the easy and reproducible generation of spheroids and MCTSs. The development and assessment of acoustically mediated drug therapies have been mainly demonstrated in spheroids made up of tumor cells only. Despite the promising results obtained with these spheroids, the successful evaluation of these therapies will need to be addressed in more relevant 3D vascular MCTS models using MCTS-on-chip platforms. These MTCSs will be generated from patient-derived cancer cells and nontumor cells, such as fibroblasts, adipocytes, and immune cells.
Collapse
|
3
|
Lee J, Um W, Moon H, Joo H, Song Y, Park M, Yoon B, Kim HR, Park JH. Evading Doxorubicin-Induced Systemic Immunosuppression Using Ultrasound-Responsive Liposomes Combined with Focused Ultrasound. Pharmaceutics 2022; 14:pharmaceutics14122603. [PMID: 36559097 PMCID: PMC9784431 DOI: 10.3390/pharmaceutics14122603] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/11/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Doxorubicin (DOX) is a representative anticancer drug with a unique ability to induce immunogenic cell death of cancer cells. However, undesired toxicity on immune cells has remained a significant challenge, hindering the usage of DOX in cancer immunotherapy. Here, we report a combined therapy to avoid the off-target toxicity of DOX by adapting ultrasound-responsive liposomal doxorubicin and focused ultrasound exposure. Histological analysis demonstrated that the combined therapy induced less hemosiderosis of splenocytes and improved tumor infiltration of cytotoxic T lymphocytes. Additionally, in vivo therapeutic evaluation results indicate that the combined therapy achieved higher efficacy when combined with PD-1 immune-checkpoint blockade therapy by improving immunogenicity.
Collapse
Affiliation(s)
- Jeongjin Lee
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, 81 Irwon-ro, Seoul 06351, Republic of Korea
| | - Wooram Um
- Department of Biotechnology, Pukyong National University, 45 Yongso-ro, Busan 48513, Republic of Korea
| | - Hyungwon Moon
- R&D Center, IMGT Co., Ltd., 172 Dolma-ro, Seongnam 13605, Republic of Korea
| | - Hyeyeon Joo
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
| | - Yeari Song
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
| | - Minsung Park
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
| | - Been Yoon
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
| | - Hyun-Ryoung Kim
- R&D Center, IMGT Co., Ltd., 172 Dolma-ro, Seongnam 13605, Republic of Korea
- Correspondence: (H.-R.K.); (J.H.P.)
| | - Jae Hyung Park
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, 81 Irwon-ro, Seoul 06351, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon 16419, Republic of Korea
- Correspondence: (H.-R.K.); (J.H.P.)
| |
Collapse
|
4
|
Sun Y, Chen LG, Fan XM, Pang JL. Ultrasound Responsive Smart Implantable Hydrogels for Targeted Delivery of Drugs: Reviewing Current Practices. Int J Nanomedicine 2022; 17:5001-5026. [PMID: 36275483 PMCID: PMC9586127 DOI: 10.2147/ijn.s374247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/31/2022] [Indexed: 11/06/2022] Open
Abstract
Over the last two decades, the process of delivering therapeutic drugs to a patient with a controlled release profile has been a significant focus of drug delivery research. Scientists have given tremendous attention to ultrasound-responsive hydrogels for several decades. These smart nanosystems are more applicable than other stimuli-responsive drug delivery vehicles (ie UV-, pH- and thermal-, responsive materials) because they enable more efficient targeted treatment via relatively non-invasive means. Ultrasound (US) is capable of safely transporting energy through opaque and complex media with minimal loss of energy. It is capable of being localized to smaller regions and coupled to systems operating at various time scales. However, the properties enabling the US to propagate effectively in materials also make it very difficult to transform acoustic energy into other forms that may be used. Recent research from a variety of domains has attempted to deal with this issue, proving that ultrasonic effects can be used to control chemical and physical systems with remarkable specificity. By obviating the need for multiple intravenous injections, implantable US responsive hydrogel systems can enhance the quality of life for patients who undergo treatment with a varied dosage regimen. Ideally, the ease of self-dosing in these systems would lead to increased patient compliance with a particular therapy as well. However, excessive literature has been reported based on implanted US responsive hydrogel in various fields, but there is no comprehensive review article showing the strategies to control drug delivery profile. So, this review was aimed at discussing the current strategies for controlling and targeting drug delivery profiles using implantable hydrogel systems.
Collapse
Affiliation(s)
- Yi Sun
- Center for Plastic & Reconstructive Surgery, Department of Plastic & Reconstructive Surgery, Zhejiang Provincial People’s Hospital (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, 310014, People’s Republic of China
| | - Le-Gao Chen
- General Surgery, Cancer Center, Department of Vascular Surgery, Zhejiang Provincial People’s Hospital (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, 310014, People’s Republic of China
| | - Xiao-Ming Fan
- Cancer Center, Department of Ultrasound Medicine, Zhejiang Provincial People’s Hospital (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, 310014, People’s Republic of China,Correspondence: Xiao-Ming Fan, Department of Ultrasound Medicine, Zhejiang Provincial People’s Hospital (Affiliated People’s Hospital, Hangzhou Medical College), No. 158 Shangtang Road, Hangzhou, Zhejiang, 310014, People’s Republic of China, Tel/Fax +86-571-85893290, Email
| | - Jian-Liang Pang
- Department of Vascular Surgery, Tiantai People’s Hospital of Zhejiang Province (Tiantai Branch of Zhejiang People’s Hospital), Taizhou, 317200, People’s Republic of China,Jian-Liang Pang, Department of Vascular Surgery, Tiantai People’s Hospital of Zhejiang Province (Tiantai Branch of Zhejiang People’s Hospital), Kangning Middle Road, Shifeng Street, Tiantai County, Taizhou, Zhejiang, 317200, People’s Republic of China, Tel/Fax +86-576- 81302085, Email
| |
Collapse
|
5
|
Presset A, Bodard S, Lefèvre A, Millet A, Oujagir E, Dupuy C, Iazourène T, Bouakaz A, Emond P, Escoffre JM, Nadal-Desbarats L. First Metabolomic Signature of Blood-Brain Barrier Opening Induced by Microbubble-Assisted Ultrasound. Front Mol Neurosci 2022; 15:888318. [PMID: 35795688 PMCID: PMC9251546 DOI: 10.3389/fnmol.2022.888318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 05/06/2022] [Indexed: 11/13/2022] Open
Abstract
Microbubble (MB)-assisted ultrasound (US) is a promising physical method to increase non-invasively, transiently, and precisely the permeability of the blood-brain barrier (BBB) to therapeutic molecules. Previous preclinical studies established the innocuity of this procedure using complementary analytical strategies including transcriptomics, histology, brain imaging, and behavioral tests. This cross-sectional study using rats aimed to investigate the metabolic processes following acoustically-mediated BBB opening in vivo using multimodal and multimatrices metabolomics approaches. After intravenous injection of MBs, the right striata were exposed to 1-MHz sinusoidal US waves at 0.6 MPa peak negative pressure with a burst length of 10 ms, for 30 s. Then, the striata, cerebrospinal fluid (CSF), blood serum, and urine were collected during sacrifice in three experimental groups at 3 h, 2 days, and 1 week after BBB opening (BBBO) and were compared to a control group where no US was applied. A well-established analytical workflow using nuclear magnetic resonance spectrometry and non-targeted and targeted high-performance liquid chromatography coupled to mass spectrometry were performed on biological tissues and fluids. In our experimental conditions, a reversible BBBO was observed in the striatum without physical damage or a change in rodent weight and behavior. Cerebral, peri-cerebral, and peripheral metabolomes displayed specific and sequential metabolic kinetics. The blood serum metabolome was more impacted in terms of the number of perturbated metabolisms than in the CSF, the striatum, and the urine. In addition, perturbations of arginine and arginine-related metabolisms were detected in all matrices after BBBO, suggesting activation of vasomotor processes and bioenergetic supply. The exploration of the tryptophan metabolism revealed a transient vascular inflammation and a perturbation of serotoninergic neurotransmission in the striatum. For the first time, we characterized the metabolic signature following the acoustically-mediated BBBO within the striatum and its surrounding biological compartments.
Collapse
Affiliation(s)
- Antoine Presset
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Sylvie Bodard
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Antoine Lefèvre
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
- Département Analyses Chimique et Métabolomique, PST Analyses des Systèmes Biologiques, Université de Tours, Tours, France
| | - Anaïs Millet
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Edward Oujagir
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Camille Dupuy
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Tarik Iazourène
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Ayache Bouakaz
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Patrick Emond
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
- Département Analyses Chimique et Métabolomique, PST Analyses des Systèmes Biologiques, Université de Tours, Tours, France
- CHRU Tours, Serv Med Nucl in Vitro, Tours, France
| | - Jean-Michel Escoffre
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
- Jean-Michel Escoffre,
| | - Lydie Nadal-Desbarats
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
- Département Analyses Chimique et Métabolomique, PST Analyses des Systèmes Biologiques, Université de Tours, Tours, France
- *Correspondence: Lydie Nadal-Desbarats,
| |
Collapse
|
6
|
Drug Delivery by Ultrasound-Responsive Nanocarriers for Cancer Treatment. Pharmaceutics 2021; 13:pharmaceutics13081135. [PMID: 34452096 PMCID: PMC8397943 DOI: 10.3390/pharmaceutics13081135] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 12/13/2022] Open
Abstract
Conventional cancer chemotherapies often exhibit insufficient therapeutic outcomes and dose-limiting toxicity. Therefore, there is a need for novel therapeutics and formulations with higher efficacy, improved safety, and more favorable toxicological profiles. This has promoted the development of nanomedicines, including systems for drug delivery, but also for imaging and diagnostics. Nanoparticles loaded with drugs can be designed to overcome several biological barriers to improving efficiency and reducing toxicity. In addition, stimuli-responsive nanocarriers are able to release their payload on demand at the tumor tissue site, preventing premature drug loss. This review focuses on ultrasound-triggered drug delivery by nanocarriers as a versatile, cost-efficient, non-invasive technique for improving tissue specificity and tissue penetration, and for achieving high drug concentrations at their intended site of action. It highlights aspects relevant for ultrasound-mediated drug delivery, including ultrasound parameters and resulting biological effects. Then, concepts in ultrasound-mediated drug delivery are introduced and a comprehensive overview of several types of nanoparticles used for this purpose is given. This includes an in-depth compilation of the literature on the various in vivo ultrasound-responsive drug delivery systems. Finally, toxicological and safety considerations regarding ultrasound-mediated drug delivery with nanocarriers are discussed.
Collapse
|
7
|
Somaglino L, Mousnier L, Giron A, Urbach W, Tsapis N, Taulier N. In vitro evaluation of polymeric nanoparticles with a fluorine core for drug delivery triggered by focused ultrasound. Colloids Surf B Biointerfaces 2021; 200:111561. [PMID: 33465555 DOI: 10.1016/j.colsurfb.2021.111561] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 11/06/2020] [Accepted: 01/02/2021] [Indexed: 11/25/2022]
Abstract
Polymeric nanoparticles are being intensively investigated as drug carriers. Their efficiency could be enhanced if the drug release can be triggered using an external stimulus such as ultrasound. This approach is possible using current commercial apparatus that combine focused ultrasound with MRI to perform ultrasonic surgery. In this approach, nanoparticles made of a perfluoro-octyl bromide core and a thick polymeric (PLGA-PEG) shell may represent suitable drug carriers. Indeed, their perfluorocarbon core are detectable by 19F MRI, while their polymeric shell can encapsulate drugs. However, their applicability in ultrasound-triggered drug delivery remains to be proven. To do so, we used Nile red as a model drug and we measured its release from the polymeric shell by spectrofluorometry. In the absence of ultrasound, only a small amount of Nile red release was measured (<5%). Insonations were performed in a controlled environment using a 1.1 MHz transducer emitting tone bursts for a few minutes, whereas a focused broadband hydrophone was used to detect the occurrence of cavitation. In the absence of detectable inertial cavitation, less than 5% of Nile red was released. In the presence of detectable inertial cavitation, Nile red release was ranging from 10% to 100%, depending of the duty cycle, acoustic pressure, and tank temperature (25 or 37 °C). Highest releases were obtained only for duty cycles of 25% at 37 °C and 50% at 25 °C and for a peak-to-peak acoustic pressure above 12.7 MPa. Electron microscopy and light scattering measurements showed a slight modification in the nanoparticle morphology only at high release contents. The occurrence of strong inertial cavitation is thus a prerequisite to induce drug release for these nanoparticles. Since strong inertial cavitation can lead to many unwanted biological effects, these nanoparticles may not be suitable for a therapeutic application using ultrasound-triggered drug delivery.
Collapse
Affiliation(s)
- L Somaglino
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France; IFREMER, La Seyne-sur-Mer, France
| | - L Mousnier
- Université Paris-Saclay, CNRS, Institut Galien Paris Saclay, 92296 Châtenay-Malabry, France
| | - A Giron
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France
| | - W Urbach
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France; Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, F-75005 Paris, France
| | - N Tsapis
- Université Paris-Saclay, CNRS, Institut Galien Paris Saclay, 92296 Châtenay-Malabry, France
| | - N Taulier
- Sorbonne Université, CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, F-75006 Paris, France.
| |
Collapse
|
8
|
Bi H, Xue J, Jiang H, Gao S, Yang D, Fang Y, Shi K. Current developments in drug delivery with thermosensitive liposomes. Asian J Pharm Sci 2019; 14:365-379. [PMID: 32104466 PMCID: PMC7032122 DOI: 10.1016/j.ajps.2018.07.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 06/26/2018] [Accepted: 07/25/2018] [Indexed: 12/19/2022] Open
Abstract
Thermosensitive liposomes (TSLs) have been an important research area in the field of tumor targeted chemotherapy. Since the first TSLs appeared that using 1,2-dipalmitoyl-sn-glyce-ro-3-phosphocholine (DPPC) as the primary liposomal lipid, many studies have been done using this type of liposome from basic and practical aspects. While TSLs composed of DPPC enhance the cargo release near the phase transition temperature, it has been shown that many factors affect their temperature sensitivity. Thus numerous attempts have been undertaken to develop new TSLs for improving their thermal response performance. The main objective of this review is to introduce the development and recent update of innovative TSLs formulations, including combination of radiofrequency ablation (RFA), high-intensity focused ultrasound (HIFU), magnetic resonance imaging (MRI) and alternating magnetic field (AMF). In addition, various factors affecting the design of TSLs, such as lipid composition, surfactant, size and serum components are also discussed.
Collapse
Key Words
- (DPPC), 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine
- (DPPGOG), 1,2-dipalmitoyl-sn-glycero-3-phosphoglyceroglycerol
- (DSPC), 1,2-distearoyl-sn-glycero-3-phosphocholine
- (DSPE-mPEG2000), 1,2-distearoyl-sn-glycero-3-phosphatiylethanol-amine-N-[methoxy(polyethyleneglycol)-2000]
- (LTSLs), lyso-lipid temperature sensitive liposomes
- (MPPC), 1-myristoyl-2-palmitoyl-sn-glycero-3-phosphatidylcholine
- (MSPC), 1-stearoyl-2-hydroxy-sn-glycero-3-phosphatidylcholine
- (P-lyso-PC), lysophosphatidylcholine
- (P188), 1-palmitoyl-2-stearoyl-sn-glycero-3-phosphatidylcholinex
- (P188), HO-(C2H4O)a-(C3H6O)b-(C2H4O)c-H, a=80, b=27, c=80
- Content release rate
- Drug delivery
- Hyperthermia
- Smart liposomes
- Thermosensitive liposomes
- Tumor chemotherapy
- fTSLs, fast release TSLs
- sTSLs, slow release TSLs
Collapse
Affiliation(s)
- Hongshu Bi
- Institute of New Drug Development, Liaoning Yaolian Pharmaceutical Co., Ltd., Benxi, Liaoning 117004, China
| | - Jianxiu Xue
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| | - Hong Jiang
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| | - Shan Gao
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| | - Dongjuan Yang
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| | - Yan Fang
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| | - Kai Shi
- School of Pharmacy, Shenyang Pharmaceutical University, Benxi, Liaoning 117004, China
| |
Collapse
|
9
|
Lafond M, Watanabe A, Yoshizawa S, Umemura SI, Tachibana K. Cavitation-threshold Determination and Rheological-parameters Estimation of Albumin-stabilized Nanobubbles. Sci Rep 2018; 8:7472. [PMID: 29748624 PMCID: PMC5945894 DOI: 10.1038/s41598-018-25913-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/25/2018] [Indexed: 12/24/2022] Open
Abstract
Nanobubbles (NBs) are of high interest for ultrasound (US) imaging as contrast agents and therapy as cavitation nuclei. Because of their instability (Laplace pressure bubble catastrophe) and low sensitivity to US, reducing the size of commonly used microbubbles to submicron-size is not trivial. We introduce stabilized NBs in the 100-250-nm size range, manufactured by agitating human serum albumin and perfluoro-propane. These NBs were exposed to 3.34- and 5.39-MHz US, and their sensitivity to US was proven by detecting inertial cavitation. The cavitation-threshold information was used to run a numerical parametric study based on a modified Rayleigh-Plesset equation (with a Newtonian rheology model). The determined values of surface tension ranged from 0 N/m to 0.06 N/m. The corresponding values of dilatational viscosity ranged from 5.10-10 Ns/m to 1.10-9 Ns/m. These parameters were reported to be 0.6 N/m and 1.10-8 Ns/m for the reference microbubble contrast agent. This result suggests the possibility of using albumin as a stabilizer for the nanobubbles that could be maintained in circulation and presenting satisfying US sensitivity, even in the 3-5-MHz range.
Collapse
Affiliation(s)
- Maxime Lafond
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, 980-8579, Japan.
| | - Akiko Watanabe
- Department of Anatomy, Fukuoka University School of Medicine, Fukuoka, Japan
| | - Shin Yoshizawa
- Graduate School of Engineering, Tohoku University, Sendai, Miyagi, 980-8579, Japan
| | - Shin-Ichiro Umemura
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, 980-8579, Japan
| | - Katsuro Tachibana
- Department of Anatomy, Fukuoka University School of Medicine, Fukuoka, Japan
| |
Collapse
|
10
|
Maeda M, Muragaki Y, Okamoto J, Yoshizawa S, Abe N, Nakamoto H, Ishii H, Kawabata K, Umemura S, Nishiyama N, Kataoka K, Iseki H. Sonodynamic Therapy Based on Combined Use of Low Dose Administration of Epirubicin-Incorporating Drug Delivery System and Focused Ultrasound. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:2295-2301. [PMID: 28705555 DOI: 10.1016/j.ultrasmedbio.2017.06.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 05/27/2017] [Accepted: 06/02/2017] [Indexed: 06/07/2023]
Abstract
Sonodynamic therapy (SDT) is currently considered as one of the promising minimally invasive treatment options for solid cancers. SDT is based on the combined use of a sonosensitizer drug and high-intensity focused ultrasound (HIFU) to produce cytotoxic reactive oxygen species (ROS) in and around neoplastic cells. Anthracycline drugs, including epirubicin (EPI), have been well known as effective sonosensitizers after interaction with focused ultrasound. Recently a new anticancer drug delivery system (DDS), NC-6300, has been developed that comprises EPI through an acid-labile hydrazone bond. In previous in vivo studies, NC-6300 showed basic drug safety and an excellent concentration property of EPI, and recently has been tested in clinical trials. For realizing minimally invasive cancer treatment, the present study demonstrated the effectiveness and feasibility of DDS-based SDT, which combined a small dose of NC-6300 and low energy of HIFU in mouse models of colon cancer and pancreatic cancer.
Collapse
Affiliation(s)
- Masanori Maeda
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Shinjuku, Tokyo, Japan
| | - Yoshihiro Muragaki
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Shinjuku, Tokyo, Japan.
| | - Jun Okamoto
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Shinjuku, Tokyo, Japan
| | - Shin Yoshizawa
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan
| | | | | | | | | | - Shinichiro Umemura
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan
| | - Nobuhiro Nishiyama
- Polymer Chemistry Division, Tokyo Institute of Technology, Yokohama, Kanagawa, Japan
| | - Kazunori Kataoka
- Department of Materials Engineering, The University of Tokyo, Bunkyo, Tokyo, Japan
| | - Hiroshi Iseki
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Shinjuku, Tokyo, Japan
| |
Collapse
|
11
|
Fix SM, Novell A, Yun Y, Dayton PA, Arena CB. An evaluation of the sonoporation potential of low-boiling point phase-change ultrasound contrast agents in vitro. J Ther Ultrasound 2017; 5:7. [PMID: 28127427 PMCID: PMC5260003 DOI: 10.1186/s40349-017-0085-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 01/06/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Phase-change ultrasound contrast agents (PCCAs) offer a solution to the inherent limitations associated with using microbubbles for sonoporation; they are characterized by prolonged circulation lifetimes, and their nanometer-scale sizes may allow for passive accumulation in solid tumors. As a first step towards the goal of extravascular cell permeabilization, we aim to characterize the sonoporation potential of a low-boiling point formulation of PCCAs in vitro. METHODS Parameters to induce acoustic droplet vaporization and subsequent microbubble cavitation were optimized in vitro using high-speed optical microscopy. Sonoporation of pancreatic cancer cells in suspension was then characterized at a range of pressures (125-600 kPa) and pulse lengths (5-50 cycles) using propidium iodide as an indicator molecule. RESULTS We achieved sonoporation efficiencies ranging from 8 ± 1% to 36 ± 4% (percent of viable cells), as evidenced by flow cytometry. Increasing sonoporation efficiency trended with increasing pulse length and peak negative pressure. CONCLUSIONS We conclude that PCCAs can be used to induce the sonoporation of cells in vitro, and our results warrant further investigation into the use of PCCAs as extravascular sonoporation agents in vivo.
Collapse
Affiliation(s)
- Samantha M Fix
- Eshelman School of Pharmacy, University of North Carolina Chapel Hill, Chapel Hill, NC USA
| | - Anthony Novell
- Joint Department of Biomedical Engineering, University of North Carolina Chapel Hill and North Carolina State University, Chapel Hill, NC USA
| | - Yeoheung Yun
- FIT BEST Laboratory, Chemical, Biological and Bioengineering Department, North Carolina A&T State University, Greensboro, NC USA
| | - Paul A Dayton
- Eshelman School of Pharmacy, University of North Carolina Chapel Hill, Chapel Hill, NC USA.,Joint Department of Biomedical Engineering, University of North Carolina Chapel Hill and North Carolina State University, Chapel Hill, NC USA
| | - Christopher B Arena
- Joint Department of Biomedical Engineering, University of North Carolina Chapel Hill and North Carolina State University, Chapel Hill, NC USA.,Laboratory for Therapeutic Directed Energy, Department of Physics, Elon University, Elon, NC USA
| |
Collapse
|
12
|
Hagemann C, Amend D, Kessler AF, Linsenmann T, Ernestus RI, Löhr M. High-Efficiency Transfection of Glioblastoma Cells and a Simple Spheroid Migration Assay. Methods Mol Biol 2017; 1622:63-79. [PMID: 28674801 DOI: 10.1007/978-1-4939-7108-4_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Despite international research efforts, patients with glioblastoma multiforme (GBM)-the most common malignant brain tumors in adults-exhibit a very unfavorable prognosis. Their aggressive local growth pattern and increased invasiveness, due to a high motility of the tumor cells, hamper treatment. However, the molecular mechanisms regulating glioblastoma cell migration are still elusive. Here, we describe the combination of a highly efficient cell transfection by Nucleofection® technology and the generation of spheroids from these transfected glioblastoma cell lines. Nucleofection allows the manipulation of protein expression by overexpression and siRNA mediated protein knockdown. Transfection efficiencies >70% can be achieved with some GBM cell lines. Transfected neurospheres then can be used for migration assays (as described here in detail) and a multitude of other functional assays. In comparison to monolayer cultures, the advantage of spheroids is their resemblance with organized tissue in combination with the accuracy of in vitro methodology and marked experimental flexibility.
Collapse
Affiliation(s)
- Carsten Hagemann
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany.
| | - Diana Amend
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany
| | - Almuth F Kessler
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany
| | - Thomas Linsenmann
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany
| | - Ralf-Ingo Ernestus
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany
| | - Mario Löhr
- Tumorbiology Laboratory, Department of Neurosurgery, University of Würzburg, Josef-Schneider-Str. 11, 97080, Würzburg, Germany
| |
Collapse
|
13
|
Arora JS, Murad HY, Ashe S, Halliburton G, Yu H, He J, John VT, Khismatullin DB. Ablative Focused Ultrasound Synergistically Enhances Thermally Triggered Chemotherapy for Prostate Cancer in Vitro. Mol Pharm 2016; 13:3080-90. [PMID: 27383214 DOI: 10.1021/acs.molpharmaceut.6b00216] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
High-intensity focused ultrasound (HIFU) can locally ablate biological tissues such as tumors, i.e., induce their rapid heating and coagulative necrosis without causing damage to surrounding healthy structures. It is widely used in clinical practice for minimally invasive treatment of prostate cancer. Nonablative, low-power HIFU was established as a promising tool for triggering the release of chemotherapeutic drugs from temperature-sensitive liposomes (TSLs). In this study, we combine ablative HIFU and thermally triggered chemotherapy to address the lack of safe and effective treatment options for elderly patients with high-risk localized prostate cancer. DU145 prostate cancer cells were exposed to chemotherapy (free and liposomal Sorafenib) and ablative HIFU, alone or in combination. Prior to cell viability assessment by trypan blue exclusion and flow cytometry, the uptake of TSLs by DU145 cells was verified by confocal microscopy and cryogenic scanning electron microscopy (cryo-SEM). The combination of TSLs encapsulating 10 μM Sorafenib and 8.7W HIFU resulted in a viability of less than 10% at 72 h post-treatment, which was significant less than the viability of the cells treated with free Sorafenib (76%), Sorafenib-loaded TSLs (63%), or HIFU alone (44%). This synergy was not observed on cells treated with Sorafenib-loaded nontemperature sensitive liposomes and HIFU. According to cryo-SEM analysis, cells exposed to ablative HIFU exhibited significant mechanical disruption. Water bath immersion experiments also showed an important role of mechanical effects in the synergistic enhancement of TSL-mediated chemotherapy by ablative HIFU. This combination therapy can be an effective strategy for treatment of geriatric prostate cancer patients.
Collapse
Affiliation(s)
- Jaspreet S Arora
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Vector-Borne Infectious Disease Research Center, Tulane University , New Orleans, Louisiana 70118, United States
| | - Hakm Y Murad
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Stephen Ashe
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
| | - Gray Halliburton
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Heng Yu
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States
| | - Jibao He
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
| | - Vijay T John
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Vector-Borne Infectious Disease Research Center, Tulane University , New Orleans, Louisiana 70118, United States
| | - Damir B Khismatullin
- Department of Biomedical Engineering, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Institute for Integrative Engineering for Health and Medicine, Tulane University , New Orleans, Louisiana 70118, United States.,Tulane Cancer Center, Tulane University School of Medicine , New Orleans, Louisiana 70118, United States
| |
Collapse
|
14
|
Zervantonakis IK, Arvanitis CD. Controlled Drug Release and Chemotherapy Response in a Novel Acoustofluidic 3D Tumor Platform. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:2616-26. [PMID: 27031786 PMCID: PMC4889337 DOI: 10.1002/smll.201503342] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 02/02/2016] [Indexed: 05/04/2023]
Abstract
Overcoming transport barriers to delivery of therapeutic agents in tumors remains a major challenge. Focused ultrasound (FUS), in combination with modern nanomedicine drug formulations, offers the ability to maximize drug transport to tumor tissue while minimizing toxicity to normal tissue. This potential remains unfulfilled due to the limitations of current approaches in accurately assessing and quantifying how FUS modulates drug transport in solid tumors. A novel acoustofluidic platform is developed by integrating a physiologically relevant 3D microfluidic device and a FUS system with a closed-loop controller to study drug transport and assess the response of cancer cells to chemotherapy in real time using live cell microscopy. FUS-induced heating triggers local release of the chemotherapeutic agent doxorubicin from a liposomal carrier and results in higher cellular drug uptake in the FUS focal region. This differential drug uptake induces locally confined DNA damage and glioblastoma cell death in the 3D environment. The capabilities of acoustofluidics for accurate control of drug release and monitoring of localized cell response are demonstrated in a 3D in vitro tumor mode. This has important implications for developing novel strategies to deliver therapeutic agents directly to the tumor tissue while sparing healthy tissue.
Collapse
Affiliation(s)
| | - Costas D. Arvanitis
- Department of Radiology, Harvard Medical School, Brigham and Women’s Hospital 221 Longwood Ave, 514a, Boston, 02115, MA
| |
Collapse
|
15
|
Fabiilli ML, Phanse RA, Moncion A, Fowlkes JB, Franceschi RT. Use of Hydroxyapatite Doping to Enhance Responsiveness of Heat-Inducible Gene Switches to Focused Ultrasound. ULTRASOUND IN MEDICINE & BIOLOGY 2016; 42:824-30. [PMID: 26712417 PMCID: PMC4744111 DOI: 10.1016/j.ultrasmedbio.2015.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 11/03/2015] [Accepted: 11/08/2015] [Indexed: 05/04/2023]
Abstract
Recently, we demonstrated that ultrasound-based hyperthermia can activate cells containing a heat-activated and ligand-inducible gene switch in a spatio-temporally controlled manner. These engineered cells can be incorporated into hydrogel scaffolds (e.g., fibrin) for in vivo implantation, where ultrasound can be used to non-invasively pattern transgene expression. Due to their high water content, the acoustic attenuation of fibrin scaffolds is low. Thus, long ultrasound exposures and high acoustic intensities are needed to generate sufficient hyperthermia for gene activation. Here, we demonstrate that the attenuation of fibrin scaffolds and the resulting hyperthermia achievable with ultrasound can be increased significantly by doping the fibrin with hydroxyapatite (HA) nanopowder. The attenuation of a 1% (w/v) fibrin scaffold with 5% (w/v) HA was similar to soft tissue. Transgene activation of cells harboring the gene switch occurred at lower acoustic intensities and shorter exposures when the cells were encapsulated in HA-doped fibrin scaffolds versus undoped scaffolds. Inclusion of HA in the fibrin scaffold did not affect the viability of the encapsulated cells.
Collapse
Affiliation(s)
- Mario L Fabiilli
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA.
| | - Rahul A Phanse
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Alexander Moncion
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA
| | - J Brian Fowlkes
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI, USA; Applied Physics Program, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Renny T Franceschi
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; School of Dentistry, University of Michigan, Ann Arbor, MI, USA; Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, USA
| |
Collapse
|
16
|
Gross D, Coutier C, Legros M, Bouakaz A, Certon D. A cMUT probe for ultrasound-guided focused ultrasound targeted therapy. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2015; 62:1145-1160. [PMID: 26067049 DOI: 10.1109/tuffc.2014.006887] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ultrasound-mediated targeted therapy represents a promising strategy in the arsenal of modern therapy. Capacitive micromachined ultrasonic transducer (cMUT) technology could overcome some difficulties encountered by traditional piezoelectric transducers. In this study, we report on the design, fabrication, and characterization of an ultrasound-guided focused ultrasound (USgFUS) cMUT probe dedicated to preclinical evaluation of targeted therapy (hyperthermia, thermosensitive liposomes activation, and sonoporation) at low frequency (1 MHz) with simultaneous ultrasonic imaging and guidance (15 to 20 MHz). The probe embeds two types of cMUT arrays to perform the modalities of targeted therapy and imaging respectively. The wafer-bonding process flow employed for the manufacturing of the cMUTs is reported. One of its main features is the possibility of implementing two different gap heights on the same wafer. All the design and characterization steps of the devices are described and discussed, starting from the array design up to the first in vitro measurements: optical (microscopy) and electrical (impedance) measurements, arrays' electroacoustic responses, focused pressure field mapping (maximum peak-to-peak pressure = 2.5 MPa), and the first B-scan image of a wire-target phantom.
Collapse
|
17
|
Pereira MC, Arachchige MCM, Reshetnyak YK, Andreev OA. Advanced targeted nanomedicine. J Biotechnol 2015; 202:88-97. [PMID: 25615945 PMCID: PMC4685670 DOI: 10.1016/j.jbiotec.2015.01.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Revised: 01/05/2015] [Accepted: 01/12/2015] [Indexed: 12/27/2022]
Abstract
Targeted drug delivery has been the major topic in drug formulation and delivery. As nanomedicine emerges to create nano scale therapeutics and diagnostics, it is still essential to embed targeting capability to these novel systems to make them useful. Here we discuss various targeting approaches for delivery of therapeutic and diagnostic nano materials in view of search for more universal methods to target diseased tissues. Many diseases are accompanied with hypoxia and acidosis. Coating nanoparticles with pH Low Insertion Peptides (pHLIPs) increases efficiency of targeting acidic diseased tissues. It has been showing promising results to create future nanotheranostics for cancer and other diseases which are dominating in the present world.
Collapse
Affiliation(s)
| | - Mohan C M Arachchige
- Department of Physics, University of Rhode Island, 2 Lippit Rd., Kingston, RI 028881, USA
| | - Yana K Reshetnyak
- Department of Physics, University of Rhode Island, 2 Lippit Rd., Kingston, RI 028881, USA
| | - Oleg A Andreev
- Department of Physics, University of Rhode Island, 2 Lippit Rd., Kingston, RI 028881, USA.
| |
Collapse
|
18
|
Abstract
Background Mild hyperthermia (mHT) increases the tumor perfusion and vascular permeability, and reduces the interstitial fluid pressure, resulting in better intra-tumoral bioavailability of low molecular weight drugs. This approach is potentially also attractive for delivery of therapeutic macromolecules, such as antibodies. Here, we investigated the effects of mHT on the stability, immunological and pharmacological properties of Herceptin®, a clinically approved antibody, targeting the human epidermal growth factor receptor 2 (HER-2) overexpressed in breast cancer. Results Herceptin® was heated to 37°C (control) and 42°C (mHT) for 1 hour. Formation of Herceptin® aggregates was measured using Nile Red assay. mHT did not result in additional Herceptin® aggregates compared to 37°C, showing the Herceptin® stability is unchanged. Immunological and pharmacological properties of Herceptin® were evaluated following mHT using HER-2 positive breast cancer cells (BT-474). Exposure of Herceptin® to mHT preserved recognition and binding affinity of Herceptin® to HER-2. Western-blot and cell proliferation assays on BT-474 cells showed that mHT left the inhibitory activities of Herceptin® unchanged. Conclusions The stability, and the immunological and pharmacological properties of Herceptin® are not negatively affected by mHT. Further in-vivo studies are required to evaluate the influence of mHT on intra-tumoral bioavailability and therapeutic effectiveness of Herceptin®.
Collapse
|
19
|
Novell A, Al Sabbagh C, Escoffre JM, Gaillard C, Tsapis N, Fattal E, Bouakaz A. Focused ultrasound influence on calcein-loaded thermosensitive stealth liposomes. Int J Hyperthermia 2015; 31:349-58. [PMID: 25677841 DOI: 10.3109/02656736.2014.1000393] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Focused ultrasound (FUS) is a versatile technology for non-invasive thermal therapies in oncology. Indeed, this technology has great potential for local heat-mediated drug delivery from thermosensitive liposomes (TSLs), thus improving therapeutic efficacy and reducing toxicity profiles. In the present study we evaluated the influence of FUS parameters on the release of calcein from TSLs used to model a hydrophilic drug. Quantitative calcein release from TSLs (DPPC/CHOL/DSPE-PEG2000: 90/5/5) and non-thermosensitive liposomes (NTSLs) (DPPC/CHOL/DSPE-PEG2000: 65/30/5) was measured by spectrofluorimetry after both water bath and FUS-induced in vitro heating. The heating of TSLs at 42 °C in a water bath resulted in a maximum calcein release of 45%. No additional calcein release was observed at temperatures above 42 °C. A similar percentage of calcein release was achieved when TSLs were exposed to 1 MHz sinusoidal waves at peak negative pressure of 1.5 MPa, 40% duty cycle, for 10 min (i.e. above 42 °C). No release was detected when NTSLs were heated in a water bath. For both TSLs and NTSLs, the calcein release was increased by more than 10% for acoustic pressures ranging from 1.5 MPa to 2 MPa. This additional release was attributed to the mechanical stress generated by FUS, which was sufficient to disrupt the liposomal membrane. Furthermore, analysis of cryo-TEM images showed a significant decrease in liposome size (14%) induced by the thermal effect, whereas the liposome diameter remained unaffected by the FUS-triggered non-thermal effects.
Collapse
Affiliation(s)
- Anthony Novell
- UMR Inserm U930, Université François-Rabelais de Tours , France
| | | | | | | | | | | | | |
Collapse
|
20
|
Formulation and Pharmacokinetics of Thermosensitive Stealth® Liposomes Encapsulating 5-Fluorouracil. Pharm Res 2014; 32:1585-603. [DOI: 10.1007/s11095-014-1559-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/27/2014] [Indexed: 01/29/2023]
|