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Effects and Mechanisms of Low-Intensity Pulsed Ultrasound for Chronic Prostatitis and Chronic Pelvic Pain Syndrome. Int J Mol Sci 2016; 17:ijms17071057. [PMID: 27376284 PMCID: PMC4964433 DOI: 10.3390/ijms17071057] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/21/2016] [Accepted: 06/27/2016] [Indexed: 01/15/2023] Open
Abstract
Chronic Prostatitis/Chronic Pelvic Pain Syndrome (CP/CPPS) is one of the most common urologic diseases, and no curative treatments have been identified. Low-intensity pulsed ultrasound (LIPUS) has been successfully used in promoting tissue healing, inhibiting inflammation and pain, differentiating stem cells, and stimulating nerve regeneration/muscle regeneration, as well as enhancing angiogenesis. Very recently, LIPUS has been proven an effective approach for CP/CPPS. This review summarizes the possible mechanisms responsible for the therapeutic effect of LIPUS for CP/CPPS. To search publications relevant to the topics of this review, the search engine for life sciences of Entrez was used. We reviewed the available evidence from 1954 through 2015 concerning LIPUS for CP/CPPS. According to the literature, both transrectal and transperineal approaches of LIPUS are effective for CP/CPPS.
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302
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Juliar BA, Bromley MM, Moncion A, Jones DC, O’Neill EG, Wilson CG, Franceschi RT, Fabiilli ML. In Situ Transfection by Controlled Release of Lipoplexes Using Acoustic Droplet Vaporization. Adv Healthc Mater 2016; 5:1764-74. [PMID: 27191532 PMCID: PMC4956527 DOI: 10.1002/adhm.201600008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/15/2016] [Indexed: 12/26/2022]
Abstract
Localized delivery of nucleic acids to target sites (e.g., diseased tissue) is critical for safe and efficacious gene therapy. An ultrasound-based technique termed acoustic droplet vaporization (ADV) has been used to spatiotemporally control the release of therapeutic small molecules and proteins contained within sonosensitive emulsions. Here, ADV is used to control the release of lipoplex-containing plasmid DNA encoding an enhanced green fluorescent protein reporter-from a sonosensitive emulsion. Focused ultrasound (3.5 MHz, mechanical index (MI) ≥ 1.5) generates robust release of fluorescein (i.e., surrogate payload) and lipoplex from the emulsion. In situ release of the lipoplex from the emulsion using ADV (MI = 1.5, 30 cycles) yields a 55% release efficiency, resulting in 43% transfection efficiency and 95% viability with C3H/10T1/2 cells. Without exposure to ultrasound, the release and transfection efficiencies are 5% and 7%, respectively, with 99% viability. Lipoplex released by ADV retains its bioactivity while the ADV process does not yield any measureable sonoporative enhancement of transfection. Co-encapsulation of Ficoll PM 400 within the lipoplex-loaded emulsion, and its subsequent release using ADV, yield higher transfection efficiency than the lipoplex alone. The results demonstrate that ADV can have utility in the spatiotemporal control of gene delivery.
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Affiliation(s)
- Benjamin A. Juliar
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
| | - Melissa M. Bromley
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
| | - Alexander Moncion
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
- Applied Physics Program, University of Michigan, Ann Arbor, MI 48109, USA
| | - Denise C. Jones
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
| | - Eric G. O’Neill
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
| | | | - Renny T. Franceschi
- School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Mario L. Fabiilli
- Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA
- Applied Physics Program, University of Michigan, Ann Arbor, MI 48109, USA
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303
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Fantinati MS, Mendonça DEO, Fantinati AMM, Santos BFD, Reis JCO, Afonso CL, Vinaud MC, Lino Júnior RDS. Low intensity ultrasound therapy induces angiogenesis and persistent inflammation in the chronic phase of the healing process of third degree burn wounds experimentally induced in diabetic and non-diabetic rats. Acta Cir Bras 2016; 31:463-71. [DOI: 10.1590/s0102-865020160070000006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/22/2016] [Indexed: 12/25/2022] Open
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305
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Stamp MEM, Brugger MS, Wixforth A, Westerhausen C. Acoustotaxis -in vitro stimulation in a wound healing assay employing surface acoustic waves. Biomater Sci 2016; 4:1092-9. [PMID: 27138623 DOI: 10.1039/c6bm00125d] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, ultrasound based approach for the dynamic stimulation and promotion of tissue healing processes employing surface acoustic waves (SAW) on a chip is presented for the example of osteoblast-like SaOs-2 cells. In our investigations, we directly irradiate cells with SAW on a SiO2 covered piezoelectric LiNbO3 substrate. Observing the temporal evolution of cell growth and migration and comparing non-irradiated to irradiated areas on the chip, we find that the SAW-treated cells exhibit a significantly increased migration as compared to the control samples. Apart from quantifying our experimental findings on the cell migration stimulation, we also demonstrate the full bio compatibility and bio functionality of our SAW technique by using LDH assays. We safely exclude parasitic side effects such as a SAW related increased substrate temperature or nutrient flow by thoroughly monitoring the temperature and the flow field using infrared microscopy and micro particle image velocimetry. Our results show that the SAW induced dynamic mechanical and electrical stimulation obviously directly promotes the cell growth. We conclude that this stimulation method offers a powerful platform for future medical treatment, e.g. being implemented as a implantable biochip with wireless extra-corporal power supply to treat deeper tissue.
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Affiliation(s)
- M E M Stamp
- Chair for Experimental Physics I, University of Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany.
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306
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307
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Akhbari S, Sammoura F, Lin L. Equivalent Circuit Models for Large Arrays of Curved and Flat Piezoelectric Micromachined Ultrasonic Transducers. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2016; 63:432-47. [PMID: 26863658 DOI: 10.1109/tuffc.2016.2525802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Equivalent circuit models of large arrays of curved (spherical shape) and flat piezoelectric micromachined ultrasonic transducers (pMUTs) have been developed for complex pMUT arrays design and analysis. The exact solutions for circuit parameters in the electromechanical domain, such as mechanical admittance, input electrical impedance, and electromechanical transformer ratio, were analytically derived. By utilizing the array solution methods previously established for the thickness-mode piezoelectric devices and capacitive micromachined ultrasonic transducers (cMUTs), the single pMUT circuit model can be extended to models for array structures. The array model includes both the self- and mutual-acoustic radiation impedances of individual transducers in the acoustic medium. Volumetric displacement, induced piezoelectric current, and pressure field can be derived with respect to the input voltage matrix, material, and geometrical properties of each individual transducer and the array structure. As such, the analytical models presented here can be used as a guideline for analyses and design evaluations of large arrays of curved and flat pMUTs efficiently and can be further generalized to evaluate other pMUT architectures in the form of single devices or arrays.
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308
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Şilte Karamanlioğlu D, Aktas I, Ozkan FU, Kaysin M, Girgin N. Effectiveness of ultrasound treatment applied with exercise therapy on patients with ankylosing spondylitis: a double-blind, randomized, placebo-controlled trial. Rheumatol Int 2016; 36:653-61. [PMID: 26923690 DOI: 10.1007/s00296-016-3441-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 02/10/2016] [Indexed: 11/26/2022]
Abstract
The aim of our study was to evaluate effectiveness of ultrasound treatment applied with exercise therapy in patients with ankylosing spondylitis. Fifty-two patients, who were diagnosed according to modified New York criteria, were aged 25-60, and have spine pain, were randomly assigned to two groups. Ultrasound (US) and exercise therapy were applied to treatment group (27); placebo US treatment and exercise therapy were applied to control group (25). Patients were evaluated before treatment, at the end of treatment, and 4 weeks after the treatment. Daily and night pain, morning stiffness, patient global assessment (PGA), doctor global assessment (DGA), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Bath Ankylosing Spondylitis Functional Index (BASFI), Bath Ankylosing Spondylitis Metrology Index (BASMI), Ankylosing Spondylitis Quality of Life (ASQoL) questionnaire, Ankylosing Spondylitis Disease Activity Score (ASDAS) erythrocyte sedimentation rate (ESR), and ASDAS C-reactive protein (CRP) were used as clinical parameters. In US group, all parameters showed significant improvements at 2 and 6 weeks, in comparison with the baseline. In placebo US group, significant improvement was obtained for all parameters (except tragus-to-wall distance and modified Schober test at 2 weeks and lumbar side flexion and modified Schober test at 6 weeks). Comparison of the groups showed significantly superior results of US group for parameters of BASMI (p < 0.05), tragus-wall distance (p < 0.05), PGA (p < 0.01), and DGA (p < 0.05) at 2 weeks as well as for the parameters of daily pain (p < 0.01), PGA (p < 0.05), DGA (p < 0.01), BASDAI (p < 0.05), ASDAS-CRP (p < 0.05), ASDAS-ESR (p < 0.01), lumbar side flexion (p < 0.01), the modified Schober test (p < 0.01), and ASQoL (p < 0.05) at 6 weeks. Our study showed that ultrasound treatment increases the effect of exercise in patients with ankylosing spondylitis.
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Affiliation(s)
| | - Ilknur Aktas
- Fatih Sultan Mehmet Education and Training Hospital, Istanbul, Turkey
| | - Feyza Unlu Ozkan
- Fatih Sultan Mehmet Education and Training Hospital, Istanbul, Turkey
| | - Meryem Kaysin
- Fatih Sultan Mehmet Education and Training Hospital, Istanbul, Turkey
| | - Nuray Girgin
- Fatih Sultan Mehmet Education and Training Hospital, Istanbul, Turkey
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309
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Marycz K, Lewandowski D, Tomaszewski KA, Henry BM, Golec EB, Marędziak M. Low-frequency, low-magnitude vibrations (LFLM) enhances chondrogenic differentiation potential of human adipose derived mesenchymal stromal stem cells (hASCs). PeerJ 2016; 4:e1637. [PMID: 26966645 PMCID: PMC4782709 DOI: 10.7717/peerj.1637] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 01/07/2016] [Indexed: 12/11/2022] Open
Abstract
The aim of this study was to evaluate if low-frequency, low-magnitude vibrations (LFLM) could enhance chondrogenic differentiation potential of human adipose derived mesenchymal stem cells (hASCs) with simultaneous inhibition of their adipogenic properties for biomedical purposes. We developed a prototype device that induces low-magnitude (0.3 g) low-frequency vibrations with the following frequencies: 25, 35 and 45 Hz. Afterwards, we used human adipose derived mesenchymal stem cell (hASCS), to investigate their cellular response to the mechanical signals. We have also evaluated hASCs morphological and proliferative activity changes in response to each frequency. Induction of chondrogenesis in hASCs, under the influence of a 35 Hz signal leads to most effective and stable cartilaginous tissue formation through highest secretion of Bone Morphogenetic Protein 2 (BMP-2), and Collagen type II, with low concentration of Collagen type I. These results correlated well with appropriate gene expression level. Simultaneously, we observed significant up-regulation of α3, α4, β1 and β3 integrins in chondroblast progenitor cells treated with 35 Hz vibrations, as well as Sox-9. Interestingly, we noticed that application of 35 Hz frequencies significantly inhibited adipogenesis of hASCs. The obtained results suggest that application of LFLM vibrations together with stem cell therapy might be a promising tool in cartilage regeneration.
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Affiliation(s)
- Krzysztof Marycz
- Faculty of Biology, University of Environmental and Life Sciences, Wroclaw, Poland; Wroclaw Research Centre EIT +, Wroclaw, Poland
| | - Daniel Lewandowski
- Department of Mechanics, Materials Science and Engineering, Wrocław University of Technology , Wrocław , Poland
| | - Krzysztof A Tomaszewski
- Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland; Department of Orthopaedics and Trauma Surgery, 5th Military Clinical Hospital and Polyclinic, Krakow, Poland
| | - Brandon M Henry
- Department of Anatomy, Jagiellonian University Medical College , Krakow , Poland
| | - Edward B Golec
- Department of Orthopaedics and Trauma Surgery, 5th Military Clinical Hospital and Polyclinic, Krakow, Poland; Faculty of Motor Rehabilitation, Bronislaw Czech University School of Physical Education, Krakow, Poland
| | - Monika Marędziak
- Faculty of Veterinary Medicine, Department of Animal Physiology and Biostructure, University of Environmental and Life Sciences , Wroclaw , Poland
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310
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Chernack B, Knowlton SE, Kohler MJ. The Use of Ultrasound in Palliative Care and Hospice. Am J Hosp Palliat Care 2016; 34:385-391. [DOI: 10.1177/1049909115625960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Palliative care aims to reduce symptom burden and enhance quality of life for those with terminal disease. Ultrasound has become an increasingly popular diagnostic and therapeutic modality due to its low cost, ease of portability, safety, and good patient acceptance. A review of the literature to date shows that as a diagnostic tool, as a therapeutic modality, and as a tool to accurately guide palliative procedures, ultrasound can have many roles in palliative care and hospice. Based on our clinical experience, musculoskeletal ultrasound can be of benefit to patients with terminal disease. Examples include adhesive capsulitis in advanced neurologic disease and chronic osteomyelitis in a patient with metastatic colon cancer. Ideally, further studies investigating the use of ultrasound in the palliative care population will be conducted in the future to enhance the availability of diagnostic and therapeutic capabilities of this particular modality.
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Affiliation(s)
- Betty Chernack
- Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Sasha E. Knowlton
- Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Minna J. Kohler
- Harvard Medical School, Boston, MA, USA
- Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Boston, MA, USA
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311
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Hsiao YH, Kuo SJ, Tsai HD, Chou MC, Yeh GP. Clinical Application of High-intensity Focused Ultrasound in Cancer Therapy. J Cancer 2016; 7:225-31. [PMID: 26918034 PMCID: PMC4747875 DOI: 10.7150/jca.13906] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 12/03/2015] [Indexed: 12/25/2022] Open
Abstract
The treatment of cancer is an important issue in both developing and developed countries. Clinical use of ultrasound in cancer is not only for the diagnosis but also for the treatment. Focused ultrasound surgery (FUS) is a noninvasive technique. By using the combination of high-intensity focused ultrasound (HIFU) and imaging method, FUS has the potential to ablate tumor lesions precisely. The main mechanisms of HIFU ablation involve mechanical and thermal effects. Recent advances in HIFU have increased its popularity. Some promising results were achieved in managing various malignancies, including pancreas, prostate, liver, kidney, breast and bone. Other applications include brain tumor ablation and disruption of the blood-brain barrier. We aim at briefly outlining the clinical utility of FUS as a noninvasive technique for a variety of types of cancer treatment.
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Affiliation(s)
- Yi-Hsuan Hsiao
- 1. School of Medicine, Chung Shan Medical University, Taichung, Taiwan; 2. Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan
| | - Shou-Jen Kuo
- 3. Comprehensive Breast Cancer Center, Changhua Christian Hospital, Changhua, Taiwan
| | - Horng-Der Tsai
- 2. Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan
| | - Ming-Chih Chou
- 1. School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Guang-Perng Yeh
- 1. School of Medicine, Chung Shan Medical University, Taichung, Taiwan; 2. Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan
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312
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Suarez Castellanos IM, Balteanu B, Singh T, Zderic V. Therapeutic Modulation of Calcium Dynamics Using Ultrasound and Other Energy-Based Techniques. IEEE Rev Biomed Eng 2016; 9:177-191. [DOI: 10.1109/rbme.2016.2555760] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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313
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Korolovych VF, Grishina OA, Inozemtseva OA, Selifonov AV, Bratashov DN, Suchkov SG, Bulavin LA, Glukhova OE, Sukhorukov GB, Gorin DA. Impact of high-frequency ultrasound on nanocomposite microcapsules: in silico and in situ visualization. Phys Chem Chem Phys 2016; 18:2389-97. [DOI: 10.1039/c5cp05465f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Simulation and direct visualization of high-frequency (1.2 MHz) ultrasound impact on microcapsules with ZnO nanoparticles embedded in the shell.
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Affiliation(s)
- V. F. Korolovych
- Saratov State University
- 410012 Saratov
- Russia
- Taras Shevchenko National University of Kyiv
- Physics Faculty
| | | | | | | | | | | | - L. A. Bulavin
- Taras Shevchenko National University of Kyiv
- Physics Faculty
- Department of Molecular Physics
- Kyiv
- Ukraine
| | | | - G. B. Sukhorukov
- School of Engineering & Materials Science
- Queen Mary University of London
- London
- UK
| | - D. A. Gorin
- Saratov State University
- 410012 Saratov
- Russia
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314
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Microbubbles and Ultrasound: Therapeutic Applications in Diabetic Nephropathy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 880:309-30. [PMID: 26486345 DOI: 10.1007/978-3-319-22536-4_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Diabetic nephropathy (DN) remains one of the most common causes of end-stage renal disease. Current therapeutic strategies aiming at optimization of serum glucose and blood pressure are beneficial in early stage DN, but are unable to fully prevent disease progression. With the limitations of current medical therapies and the shortage of available donor organs for kidney transplantation, the need for novel therapies to address DN complications and prevent progression towards end-stage renal failure is crucial. The development of ultrasound technology for non-invasive and targeted in-vivo gene delivery using high power ultrasound and carrier microbubbles offers great therapeutic potential for the prevention and treatment of DN. The promising results from preclinical studies of ultrasound-mediated gene delivery (UMGD) in several DN animal models suggest that UMGD offers a unique, non-invasive platform for gene- and cell-based therapies targeted against DN with strong clinical translation potential.
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315
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Khan I, Arany P. Biophysical Approaches for Oral Wound Healing: Emphasis on Photobiomodulation. Adv Wound Care (New Rochelle) 2015; 4:724-737. [PMID: 26634185 DOI: 10.1089/wound.2014.0623] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Significance: Oral wounds can lead to significant pain and discomfort as well as affect overall general health due to poor diet and inadequate nutrition. Besides many biological and pharmaceutical methods being investigated, there is growing interest in exploring various biophysical devices that utilize electric, magnetic, ultrasound, pressure, and light energy. Recent Advances: Significant insight into mechanisms of these biophysical devices could provide a clear rationale for their clinical use. Preclinical studies are essential precursors in determining physiological mechanisms and elucidation of causal pathways. This will lead to development of safe and effective therapeutic protocols for clinical wound management. Critical Issues: Identification of precise events initiated by biophysical devices, specifically photobiomodulation-the major focus of this review, offers promising avenues in improving oral wound management. The primary phase responses initiated by the interventions that distinctly contribute to the therapeutic response must be clearly delineated from secondary phase responses. The latter events are a consequence of the wound healing process and must not be confused with causal mechanisms. Future Direction: Clinical adoption of these biophysical devices needs robust and efficacious protocols that can be developed by well-designed preclinical and clinical studies. Elucidation of the precise molecular mechanisms of these biophysical approaches could determine optimization of their applications for predictive oral wound care.
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Affiliation(s)
- Imran Khan
- Cell Regulation and Control Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - Praveen Arany
- Cell Regulation and Control Unit, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
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316
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Bazzocchi A, Napoli A, Sacconi B, Battista G, Guglielmi G, Catalano C, Albisinni U. MRI-guided focused ultrasound surgery in musculoskeletal diseases: the hot topics. Br J Radiol 2015; 89:20150358. [PMID: 26607640 DOI: 10.1259/bjr.20150358] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
MRI-guided focused ultrasound surgery (MRgFUS) is a minimally invasive treatment guided by the most sophisticated imaging tool available in today's clinical practice. Both the imaging and therapeutic sides of the equipment are based on non-ionizing energy. This technique is a very promising option as potential treatment for several pathologies, including musculoskeletal (MSK) disorders. Apart from clinical applications, MRgFUS technology is the result of long, heavy and cumulative efforts exploring the effects of ultrasound on biological tissues and function, the generation of focused ultrasound and treatment monitoring by MRI. The aim of this article is to give an updated overview on a "new" interventional technique and on its applications for MSK and allied sciences.
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Affiliation(s)
- Alberto Bazzocchi
- 1 Diagnostic and Interventional Radiology, The "Rizzoli" Orthopaedic Institute, Bologna, Italy
| | - Alessandro Napoli
- 2 Department of Radiology, Sapienza University of Rome, Umberto I Hospital, Rome, Italy
| | - Beatrice Sacconi
- 2 Department of Radiology, Sapienza University of Rome, Umberto I Hospital, Rome, Italy
| | - Giuseppe Battista
- 3 Department of Specialized, Diagnostic, and Experimental Medicine, University of Bologna, Sant'Orsola-Malpighi Hospital, Bologna, Italy
| | - Giuseppe Guglielmi
- 4 Department of Radiology, University of Foggia, Foggia, Italy.,5 Department of Radiology, Scientific Institute "Casa Sollievo della Sofferenza" Hospital, Foggia, Italy
| | - Carlo Catalano
- 2 Department of Radiology, Sapienza University of Rome, Umberto I Hospital, Rome, Italy
| | - Ugo Albisinni
- 1 Diagnostic and Interventional Radiology, The "Rizzoli" Orthopaedic Institute, Bologna, Italy
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317
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318
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Novel delivery approaches for cancer therapeutics. J Control Release 2015; 219:248-268. [PMID: 26456750 DOI: 10.1016/j.jconrel.2015.09.067] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/09/2015] [Accepted: 09/30/2015] [Indexed: 02/07/2023]
Abstract
Currently, a majority of cancer treatment strategies are based on the removal of tumor mass mainly by surgery. Chemical and physical treatments such as chemo- and radiotherapies have also made a major contribution in inhibiting rapid growth of malignant cells. Furthermore, these approaches are often combined to enhance therapeutic indices. It is widely known that surgery, chemo- and radiotherapy also inhibit normal cells growth. In addition, these treatment modalities are associated with severe side effects and high toxicity which in turn lead to low quality of life. This review encompasses novel strategies for more effective chemotherapeutic delivery aiming to generate better prognosis. Currently, cancer treatment is a highly dynamic field and significant advances are being made in the development of novel cancer treatment strategies. In contrast to conventional cancer therapeutics, novel approaches such as ligand or receptor based targeting, triggered release, intracellular drug targeting, gene delivery, cancer stem cell therapy, magnetic drug targeting and ultrasound-mediated drug delivery, have added new modalities for cancer treatment. These approaches have led to selective detection of malignant cells leading to their eradication with minimal side effects. Lowering multi-drug resistance and involving influx transportation in targeted drug delivery to cancer cells can also contribute significantly in the therapeutic interventions in cancer.
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319
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Ren L, Chen Y, Li P, Mao Z, Huang PH, Rufo J, Guo F, Wang L, McCoy JP, Levine SJ, Huang TJ. A high-throughput acoustic cell sorter. LAB ON A CHIP 2015; 15:3870-3879. [PMID: 26289231 PMCID: PMC4641751 DOI: 10.1039/c5lc00706b] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Acoustic-based fluorescence activated cell sorters (FACS) have drawn increased attention in recent years due to their versatility, high biocompatibility, high controllability, and simple design. However, the sorting throughput for existing acoustic cell sorters is far from optimum for practical applications. Here we report a high-throughput cell sorting method based on standing surface acoustic waves (SSAWs). We utilized a pair of focused interdigital transducers (FIDTs) to generate SSAW with high resolution and high energy efficiency. As a result, the sorting throughput is improved significantly from conventional acoustic-based cell sorting methods. We demonstrated the successful sorting of 10 μm polystyrene particles with a minimum actuation time of 72 μs, which translates to a potential sorting rate of more than 13,800 events per second. Without using a cell-detection unit, we were able to demonstrate an actual sorting throughput of 3300 events per second. Our sorting method can be conveniently integrated with upstream detection units, and it represents an important development towards a functional acoustic-based FACS system.
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Affiliation(s)
- Liqiang Ren
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yuchao Chen
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Peng Li
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Zhangming Mao
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Po-Hsun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Joseph Rufo
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Feng Guo
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Lin Wang
- Ascent Bio-Nano Technologies, Inc., State College, PA, 16802, USA
| | - J. Philip McCoy
- National Heart, Lung, and Blood Institute (NHLBI), NIH, Bethesda, MD, USA
| | - Stewart J. Levine
- National Heart, Lung, and Blood Institute (NHLBI), NIH, Bethesda, MD, USA
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
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320
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Effect of ultrasounds on neurons and microglia: Cell viability and automatic analysis of cell morphology. Biomed Signal Process Control 2015. [DOI: 10.1016/j.bspc.2015.06.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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321
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Hakimova H, Kim S, Chu K, Lee SK, Jeong B, Jeon D. Ultrasound stimulation inhibits recurrent seizures and improves behavioral outcome in an experimental model of mesial temporal lobe epilepsy. Epilepsy Behav 2015; 49:26-32. [PMID: 25940106 DOI: 10.1016/j.yebeh.2015.04.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 02/06/2023]
Abstract
Current therapies for epilepsy consist mostly of pharmacological agents or invasive surgery. Recently, ultrasound (US) stimulation has been considered a promising tool for the noninvasive treatment of brain diseases, including epilepsy. However, in temporal lobe epilepsy (TLE), a common form of epilepsy, neurophysiological and functional outcomes following US stimulation are not well defined. To address this, we developed a paradigm of transcranial pulsed US stimulation to efficiently suppress seizure activity in the initial/acute period in a kainate (KA)-induced mouse model of mesial TLE. Pulsed US stimulation inhibited acute seizure activity and either delayed the onset of or suppressed status epilepticus (SE). Kainate-treated mice that had received US stimulation in the initial period exhibited fewer spontaneous recurrent seizures (SRSs) and improved performance in behavioral tasks assessing sociability and depression in the chronic period of epilepsy. Our results demonstrate that US stimulation in the acute period of epilepsy can inhibit SRSs and improve behavioral outcomes in a mouse model of mesial TLE. The present study suggests that noninvasive transcranial pulsed US stimulation may be feasible as an adjuvant therapy in patients with epilepsy. This article is part of a Special Issue entitled "Status Epilepticus".
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Affiliation(s)
- Hilola Hakimova
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sangwoo Kim
- Department of Neurology, Comprehensive Epilepsy Center, Biomedical Research Institute, Seoul National University Hospital (SNUH), Seoul, Republic of Korea
| | - Kon Chu
- Department of Neurology, Comprehensive Epilepsy Center, Biomedical Research Institute, Seoul National University Hospital (SNUH), Seoul, Republic of Korea
| | - Sang Kun Lee
- Department of Neurology, Comprehensive Epilepsy Center, Biomedical Research Institute, Seoul National University Hospital (SNUH), Seoul, Republic of Korea
| | - Bumseok Jeong
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
| | - Daejong Jeon
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea; Department of Neurology, Comprehensive Epilepsy Center, Biomedical Research Institute, Seoul National University Hospital (SNUH), Seoul, Republic of Korea.
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322
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Hectors SJCG, Jacobs I, Moonen CTW, Strijkers GJ, Nicolay K. MRI methods for the evaluation of high intensity focused ultrasound tumor treatment: Current status and future needs. Magn Reson Med 2015; 75:302-17. [PMID: 26096859 DOI: 10.1002/mrm.25758] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 03/14/2015] [Accepted: 04/10/2015] [Indexed: 01/17/2023]
Abstract
Thermal ablation with high intensity focused ultrasound (HIFU) is an emerging noninvasive technique for the treatment of solid tumors. HIFU treatment of malignant tumors requires accurate treatment planning, monitoring and evaluation, which can be facilitated by performing the procedure in an MR-guided HIFU system. The MR-based evaluation of HIFU treatment is most often restricted to contrast-enhanced T1 -weighted imaging, while it has been shown that the non-perfused volume may not reflect the extent of nonviable tumor tissue after HIFU treatment. There are multiple studies in which more advanced MRI methods were assessed for their suitability for the evaluation of HIFU treatment. While several of these methods seem promising regarding their sensitivity to HIFU-induced tissue changes, there is still ample room for improvement of MRI protocols for HIFU treatment evaluation. In this review article, we describe the major acute and delayed effects of HIFU treatment. For each effect, the MRI methods that have been-or could be-used to detect the associated tissue changes are described. In addition, the potential value of multiparametric MRI for the evaluation of HIFU treatment is discussed. The review ends with a discussion on future directions for the MRI-based evaluation of HIFU treatment.
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Affiliation(s)
- Stefanie J C G Hectors
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.,Department of Radiology, Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Igor Jacobs
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Chrit T W Moonen
- Imaging Division, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Gustav J Strijkers
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.,Biomedical Engineering and Physics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Klaas Nicolay
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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323
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Langer MD, Lewis GK. Sustained Acoustic Medicine: A Novel Long Duration Approach to Biomodulation Utilizing Low Intensity Therapeutic Ultrasound. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2015; 9467:94670I. [PMID: 30078928 PMCID: PMC6070146 DOI: 10.1117/12.2178213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Therapeutic ultrasound is an established technique for biomodulation used by physical therapists. Typically it is used to deliver energy locally for the purpose of altering tissue plasticity and increasing local circulation. Access to ultrasound therapy has been limited by equipment and logistic requirements, which has reduced the overall efficacy of the therapy. Ultrasound miniaturization allows for development of portable, wearable, self-applied ultrasound devices that sidestep these limitations. Additionally, research has shown that the timescale of acoustic stimulation matters, and directly affects the quality of result. This paper describes a novel, long duration approach to therapeutic ultrasound and reviews the current data available for a variety of musculoskeletal conditions.
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324
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Žauhar G, Radojčić ĐS, Dobravac D, Jurković S. Quantitative testing of physiotherapy ultrasound beam patterns within a clinical environment using a thermochromic tile. ULTRASONICS 2015; 58:6-10. [PMID: 25638714 DOI: 10.1016/j.ultras.2015.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 11/25/2014] [Accepted: 01/07/2015] [Indexed: 06/04/2023]
Abstract
The implementation of the non-standardized method developed at the National Physical Laboratory (UK) supporting the quality assurance of therapeutic ultrasonic beam parameters within a clinical environment is presented. The method consists of exposing an acoustic absorber tile, part of which contains a thermochromic pigment, to the ultrasonic beam, thereby forming an image of the two-dimensional intensity profile of the transducer. Nine different physiotherapy ultrasound treatment heads currently used clinically were tested using this method. Thermochromic images were postprocessed in order to estimate the Effective Radiating Area (ERA) for treatment heads operating within the frequency range from 1 MHz to 3.2 MHz, and nominal applied intensities in the range of 1-3 W/cm(2). Experimental results and comparisons with manufacturer specified values of ERA are presented. Differences in the experimentally derived results and the manufacturer values are typically well within 25%. The root-mean squared difference calculated over the nine treatment heads is 15.1%, with the thermochromic material tended to underestimate the ERA.
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Affiliation(s)
- Gordana Žauhar
- University of Rijeka, Medical Faculty, Department of Physics, Braće Branchetta 20, 51 000 Rijeka, Croatia.
| | - Đeni Smilović Radojčić
- Clinical Hospital Rijeka, Medical Physics Department, Krešimirova 42, 51 000 Rijeka, Croatia.
| | - Denis Dobravac
- Clinical Hospital Rijeka, Department for Physical and Rehabilitation Medicine, Tome Strižića 3, 51000 Rijeka, Croatia.
| | - Slaven Jurković
- Clinical Hospital Rijeka, Medical Physics Department, Krešimirova 42, 51 000 Rijeka, Croatia.
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325
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Schoellhammer CM, Srinivasan S, Barman R, Mo SH, Polat BE, Langer R, Blankschtein D. Applicability and safety of dual-frequency ultrasonic treatment for the transdermal delivery of drugs. J Control Release 2015; 202:93-100. [PMID: 25662228 DOI: 10.1016/j.jconrel.2015.02.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 01/29/2015] [Accepted: 02/02/2015] [Indexed: 12/21/2022]
Abstract
Low-frequency ultrasound presents an attractive method for transdermal drug delivery. The controlled, yet non-specific nature of enhancement broadens the range of therapeutics that can be delivered, while minimizing necessary reformulation efforts for differing compounds. Long and inconsistent treatment times, however, have partially limited the attractiveness of this method. Building on recent advances made in this area, the simultaneous use of low- and high-frequency ultrasound is explored in a physiologically relevant experimental setup to enable the translation of this treatment to testing in vivo. Dual-frequency ultrasound, utilizing 20kHz and 1MHz wavelengths simultaneously, was found to significantly enhance the size of localized transport regions (LTRs) in both in vitro and in vivo models while decreasing the necessary treatment time compared to 20kHz alone. Additionally, LTRs generated by treatment with 20kHz+1MHz were found to be more permeable than those generated with 20kHz alone. This was further corroborated with pore-size estimates utilizing hindered-transport theory, in which the pores in skin treated with 20kHz+1MHz were calculated to be significantly larger than the pores in skin treated with 20kHz alone. This demonstrates for the first time that LTRs generated with 20kHz+1MHz are also more permeable than those generated with 20kHz alone, which could broaden the range of therapeutics and doses administered transdermally. With regard to safety, treatment with 20kHz+1MHz both in vitro and in vivo appeared to result in no greater skin disruption than that observed in skin treated with 20kHz alone, an FDA-approved modality. This study demonstrates that dual-frequency ultrasound is more efficient and effective than single-frequency ultrasound and is well-tolerated in vivo.
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Affiliation(s)
- Carl M Schoellhammer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sharanya Srinivasan
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ross Barman
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Stacy H Mo
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Baris E Polat
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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326
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Skin cancer and new treatment perspectives: A review. Cancer Lett 2015; 357:8-42. [DOI: 10.1016/j.canlet.2014.11.001] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 10/31/2014] [Accepted: 11/04/2014] [Indexed: 12/25/2022]
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327
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Multimodal Imaging and Theranostic Application of Disease-Directed Agents. TOPICS IN MEDICINAL CHEMISTRY 2015. [DOI: 10.1007/7355_2015_91] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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328
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Oweis GF, Dunmire BL, Cunitz BW, Bailey MR. Non-invasive measurement of the temperature rise in tissue surrounding a kidney stone subjected to ultrasonic propulsion. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2015:2576-9. [PMID: 26736818 PMCID: PMC4832570 DOI: 10.1109/embc.2015.7318918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Transcutaneous focused ultrasound (US) is used to propel kidney stones using acoustic radiation force. It is important to estimate the level of heating generated at the stone/tissue interface for safety assessment. An in-vitro experiment is conducted to measure the temperature rise in a tissue-mimicking phantom with an embedded artificial stone and subjected to a focused beam from an imaging US array. A novel optical-imaging-based thermometry method is described using an optically clear tissue phantom. Measurements are compared to the output from a fine wire thermocouple placed on the stone surface. The optical method has good sensitivity, and it does not suffer from artificial viscous heating typically observed with invasive probes and thermocouples.
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Affiliation(s)
- Ghanem F. Oweis
- Mechanical Engineering Department, American University of Beirut, Beirut, Lebanon, phone: +961-1-350000, Ext. 3596; fax: +961-1-744462
| | - Barbrina L. Dunmire
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA
| | - Bryan W. Cunitz
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA
| | - Michael R. Bailey
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA
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329
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Nieminen HJ, Salmi A, Karppinen P, Hæggström E, Hacking SA. The potential utility of high-intensity ultrasound to treat osteoarthritis. Osteoarthritis Cartilage 2014; 22:1784-99. [PMID: 25106678 DOI: 10.1016/j.joca.2014.07.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 07/22/2014] [Accepted: 07/29/2014] [Indexed: 02/02/2023]
Abstract
Osteoarthritis (OA) is a widespread musculoskeletal disease that reduces quality of life and for which there is no cure. The treatment of OA is challenging since cartilage impedes the local and systemic delivery of therapeutic compounds (TCs). This review identifies high-intensity ultrasound (HIU) as a non-contact technique to modify articular cartilage and subchondral bone. HIU enables new approaches to overcome challenges associated with drug delivery to cartilage and new non-invasive approaches for the treatment of joint disease. Specifically, HIU has the potential to facilitate targeted drug delivery and release deep within cartilage, to repair soft tissue damage, and to physically alter tissue structures including cartilage and bone. The localized, non-invasive ultrasonic delivery of TCs to articular cartilage and subchondral bone appears to be a promising technique in the immediate future.
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Affiliation(s)
- H J Nieminen
- Department of Physics, University of Helsinki, Finland.
| | - A Salmi
- Department of Physics, University of Helsinki, Finland.
| | - P Karppinen
- Department of Physics, University of Helsinki, Finland.
| | - E Hæggström
- Department of Physics, University of Helsinki, Finland.
| | - S A Hacking
- Department of Orthopaedics, Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States.
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330
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Mahoney M, Sorace A, Warram J, Samuel S, Hoyt K. Volumetric contrast-enhanced ultrasound imaging of renal perfusion. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2014; 33:1427-37. [PMID: 25063408 PMCID: PMC4135386 DOI: 10.7863/ultra.33.8.1427] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
OBJECTIVES To determine whether volumetric contrast-enhanced ultrasound (US) imaging has the potential to monitor changes in renal perfusion after vascular injury. METHODS Volumetric contrast-enhanced US uses a series of planar image acquisitions, capturing the nonlinear second harmonic signal from microbubble contrast agents flowing in the vasculature. Tissue perfusion parameters (peak intensity [IPK], time to peak intensity [TPK], wash-in rate [WIR], and area under the curve [AUC]) were derived from time-intensity curve data collected during in vitro flow phantom studies and in vivo animal studies of healthy and injured kidneys. For the flow phantom studies, either the contrast agent concentration was held constant (10 μL/L) with varying volumetric flow rates (10, 20, and 30 mL/min), or the flow rate was held constant (30 mL/min) with varying contrast agent concentrations (5, 10, and 20 μL/L). Animal studies used healthy rats or those that underwent renal ischemia-reperfusion injury. Renal studies were performed with healthy rats while the transducer angle was varied for each volumetric contrast-enhanced US image acquisition (reference or 0°, 45°, and 90°) to determine whether repeated renal perfusion measures were isotropic and independent of transducer position. Blood serum biomarkers and immunohistology were used to confirm acute kidney injury. RESULTS Flow phantom results revealed a linear relationship between microbubble concentrations injected into the flow system and the IPK, WIR, and AUC (R(2) > 0.56; P < .005). Furthermore, there was a linear relationship between volume flow rate changes and the TPK, WIR, and AUC (R(2) > 0.77; P < .005). No significant difference was found between the transducer angle during data acquisition and any of the perfusion measures (P > .60). After induction of renal ischemia-reperfusion injury in the rat animal model (n = 4), volumetric contrast-enhanced US imaging of the injured kidney revealed an initial reduction in renal perfusion compared to control animals, followed by progressive recovery of vascular function. CONCLUSIONS Volumetric contrast-enhanced US-based renal perfusion imaging may prove clinically feasible for detecting and monitoring acute kidney injury.
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Affiliation(s)
- Marshall Mahoney
- Departments of Biomedical Engineering (M.M., A.S.), Radiology (J.W., S.S., K.H.), and Electrical Engineering (K.H.), and Comprehensive Cancer Center (K.H.), University of Alabama at Birmingham, Birmingham, Alabama USA
| | - Anna Sorace
- Departments of Biomedical Engineering (M.M., A.S.), Radiology (J.W., S.S., K.H.), and Electrical Engineering (K.H.), and Comprehensive Cancer Center (K.H.), University of Alabama at Birmingham, Birmingham, Alabama USA
| | - Jason Warram
- Departments of Biomedical Engineering (M.M., A.S.), Radiology (J.W., S.S., K.H.), and Electrical Engineering (K.H.), and Comprehensive Cancer Center (K.H.), University of Alabama at Birmingham, Birmingham, Alabama USA
| | - Sharon Samuel
- Departments of Biomedical Engineering (M.M., A.S.), Radiology (J.W., S.S., K.H.), and Electrical Engineering (K.H.), and Comprehensive Cancer Center (K.H.), University of Alabama at Birmingham, Birmingham, Alabama USA
| | - Kenneth Hoyt
- Departments of Biomedical Engineering (M.M., A.S.), Radiology (J.W., S.S., K.H.), and Electrical Engineering (K.H.), and Comprehensive Cancer Center (K.H.), University of Alabama at Birmingham, Birmingham, Alabama USA.
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331
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Hu Y, Wan JMF, Yu ACH. Cytomechanical perturbations during low-intensity ultrasound pulsing. ULTRASOUND IN MEDICINE & BIOLOGY 2014; 40:1587-98. [PMID: 24642219 DOI: 10.1016/j.ultrasmedbio.2014.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 12/23/2013] [Accepted: 01/07/2014] [Indexed: 05/24/2023]
Abstract
To establish the therapeutic potential of low-intensity ultrasound, it is important to characterize its biophysical interactions with living cells. Here, through a series of single-cell direct observations, we show that low-intensity ultrasound pulsing would give rise to a dynamic course of cytomechanical perturbations at both the membrane and nucleus levels. Our investigation was conducted using a composite platform that coupled a 1-MHz ultrasound exposure hardware to a confocal microscopy system. Short ultrasound pulses (5 cycles, 2-kHz pulse repetition frequency) with a spatial-peak time-averaged intensity of 0.24 W/cm(2) (0.85-MPa peak positive acoustic pressure) were delivered over a 10-min period to adherent Neuro-2a neuroblastoma cells, and live imaging of cellular dynamics was performed before, during and after the exposure period. Bright-field imaging results revealed progressive shrinkage of cellular cross-sectional area (25%-45%, N = 7) during low-intensity ultrasound pulsing; the initial rate of size decrease was estimated to be 8%-14% per minute. This shrinkage was found to be transient, as the sonicated cells had recovered (at a rate of size increase of 0.4%-0.9% per minute) to their pre-exposure size within 30 min after the end of exposure. Three-dimensional confocal imaging results further revealed that (i) ultrasound-induced membrane contraction was volumetric in nature (21%-45% reduction), and (ii) a concomitant decrease in nucleus volume was evident (12%-25% reduction). Together, these findings indicate that low-intensity ultrasound pulsing, if applied on the order of minutes, would reversibly perturb the physical and subcellular structures of living cells.
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Affiliation(s)
- Yaxin Hu
- Medical Engineering Program, University of Hong Kong, Pokfulam, Hong Kong
| | - Jennifer M F Wan
- Medical Engineering Program, University of Hong Kong, Pokfulam, Hong Kong
| | - Alfred C H Yu
- Medical Engineering Program, University of Hong Kong, Pokfulam, Hong Kong.
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332
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Abstract
Ultrasound-mediated gene delivery with microbubbles has emerged as an attractive nonviral vector system for site-specific and noninvasive gene therapy. Ultrasound promotes intracellular uptake of therapeutic agents, particularly in the presence of microbubbles, by increasing vascular and cell membrane permeability. Several preclinical studies have reported successful gene delivery into solid tumors with significant therapeutic effects using this novel approach. This review provides background information on gene therapy and ultrasound bioeffects and discusses the current progress and overall perspectives on the application of ultrasound and microbubble-mediated gene delivery in cancer.
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333
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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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334
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Li Y, Wang P, Wang X, Su X, Liu Q. Involvement of mitochondrial and reactive oxygen species in the sonodynamic toxicity of chlorin e6 in human leukemia K562 cells. ULTRASOUND IN MEDICINE & BIOLOGY 2014; 40:990-1000. [PMID: 24462156 DOI: 10.1016/j.ultrasmedbio.2013.11.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 11/06/2013] [Accepted: 11/16/2013] [Indexed: 06/03/2023]
Abstract
It is well accepted that sonodynamic therapy (SDT) exerts cytotoxicity and anti-tumor activity in many human tumors through the induction of cell apoptosis. The aim of the work described here was to study the effect of chlorin e6 (Ce6)-mediated SDT on human chronic myelogenous leukemia K562 cells. Our results indicate that Ce6-mediated SDT can suppress the viability of K562 cells. SDT caused apoptosis as analyzed by annexin V-phycoerythrin/7-amino-actinomycin D staining as well as cleavage of caspase 3 and the polypeptide poly(ADP-ribose) polymerase. After SDT exposure, loss of mitochondrial membrane potential, translocation of Bax from cytoplasm to mitochondria and activation of caspase 9 indicated that the mitochondrial-related apoptotic pathway might be activated. This process was accompanied by rapid generation of reactive oxygen species (ROS). Scavenging of ROS significantly blocked caspase-3 expression and the killing effect of SDT on K562 cells. Stress-activated protein kinases c-jun NH2-terminal kinase (JNK) and the p38 mitogen-activated protein kinase were activated after SDT treatment. Together, these findings indicate that Ce6-mediated SDT triggers mitochondria- and caspase-dependent apoptosis; oxidative injury may play a vital role in apoptotic signaling cascades.
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Affiliation(s)
- Yixiang Li
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Shaanxi, China
| | - Pan Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Shaanxi, China.
| | - Xiaobing Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Shaanxi, China
| | - Xiaomin Su
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Shaanxi, China
| | - Quanhong Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Shaanxi, China.
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335
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Wang YN, Simon JC, Cunitz BW, Starr FL, Paun M, Liggitt DH, Evan AP, McAteer JA, Liu Z, Dunmire B, Bailey MR. Focused ultrasound to displace renal calculi: threshold for tissue injury. J Ther Ultrasound 2014; 2:5. [PMID: 24921046 PMCID: PMC4036593 DOI: 10.1186/2050-5736-2-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 01/14/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The global prevalence and incidence of renal calculi is reported to be increasing. Of the patients that undergo surgical intervention, nearly half experience symptomatic complications associated with stone fragments that are not passed and require follow-up surgical intervention. In a clinical simulation using a clinical prototype, ultrasonic propulsion was proven effective at repositioning kidney stones in pigs. The use of ultrasound to reposition smaller stones or stone fragments to a location that facilitates spontaneous clearance could therefore improve stone-free rates. The goal of this study was to determine an injury threshold under which stones could be safely repositioned. METHODS Kidneys of 28 domestic swine were treated with exposures that ranged in duty cycle from 0%-100% and spatial peak pulse average intensities up to 30 kW/cm(2) for a total duration of 10 min. The kidneys were processed for morphological analysis and evaluated for injury by experts blinded to the exposure conditions. RESULTS At a duty cycle of 3.3%, a spatial peak intensity threshold of 16,620 W/cm(2) was needed before a statistically significant portion of the samples showed injury. This is nearly seven times the 2,400-W/cm(2) maximum output of the clinical prototype used to move the stones effectively in pigs. CONCLUSIONS The data obtained from this study show that exposure of kidneys to ultrasonic propulsion for displacing renal calculi is well below the threshold for tissue injury.
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Affiliation(s)
- Yak-Nam Wang
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Julianna C Simon
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Bryan W Cunitz
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Frank L Starr
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Marla Paun
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Denny H Liggitt
- Department of Comparative Medicine, University of Washington School of Medicine, 1959 NE Pacific Street, P.O. Box 357115, Seattle, WA 98195, USA
| | - Andrew P Evan
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, 635 Barnhill Dr., MS 5055, Indianapolis, IN 46202, USA
| | - James A McAteer
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, 635 Barnhill Dr., MS 5055, Indianapolis, IN 46202, USA
| | - Ziyue Liu
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, 635 Barnhill Dr., MS 5055, Indianapolis, IN 46202, USA
| | - Barbrina Dunmire
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
| | - Michael R Bailey
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle, WA 98105, USA
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336
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Kamaya A, Machtaler S, Safari Sanjani S, Nikoozadeh A, Graham Sommer F, Pierre Khuri-Yakub BT, Willmann JK, Desser TS. New technologies in clinical ultrasound. Semin Roentgenol 2014; 48:214-23. [PMID: 23796372 DOI: 10.1053/j.ro.2013.03.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Aya Kamaya
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA.
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337
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Verma PK, Peacock M. The management of ultrasound equipment at Sheffield Teaching Hospitals NHS Foundation Trust. ULTRASOUND (LEEDS, ENGLAND) 2014; 22:61-5. [PMID: 27433195 PMCID: PMC4760515 DOI: 10.1177/1742271x13517382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Management of ultrasound equipment at Sheffield Teaching Hospitals NHS Foundation Trust is described. The organisation and input of various stakeholders and their involvement with ultrasound equipment management and scientific ultrasound is discussed. Two important stakeholders are the Medical Equipment Management Group and the Radiation Safety Steering Committee. The Medical Equipment Management Group has a specific sub-group, the Ultrasound sub-group, and its role is to coordinate the purchase, replacement and quality assurance of ultrasound equipment in the Trust. The Radiation Safety Steering Committee has a non-ionising radiation representative and the role of this committee is to provide corporate assurance that any health and safety issues arising from the use of radiation to either patients, members of the public or staff within the Trust are being effectively managed. The Ultrasound sub-group of the Medical Equipment Management Group has successfully brought together management of all ultrasound equipment within the Trust and is in the process of fulfilling the quality assurance and training milestones set out by the Medical Equipment Management Group. Advice from the Radiation Safety Steering Committee has helped to increase awareness of ultrasound safety and good scanning practice, especially in the case of neonatal ultrasound imaging, within the Trust. In addition, the RSSC has given advice on clinical pathways for patients undergoing ionising radiation imaging while being treated by extra-corporeal shockwave lithotripsy.
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Affiliation(s)
- PK Verma
- Department of Medical Imaging & Medical Physics, Sheffield Teaching Hospitals NHS Foundation Trust, Glossop Road, Sheffield, UK
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338
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Nazer B, Gerstenfeld EP, Hata A, Crum LA, Matula TJ. Cardiovascular applications of therapeutic ultrasound. J Interv Card Electrophysiol 2013; 39:287-94. [PMID: 24297498 DOI: 10.1007/s10840-013-9845-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 09/17/2013] [Indexed: 11/25/2022]
Abstract
Ultrasound (US) has gained widespread use in diagnostic cardiovascular applications. At amplitudes and frequencies typical of diagnostic use, its biomechanical effects on tissue are largely negligible. However, these parameters can be altered to harness US's thermal and non-thermal effects for therapeutic indications. High-intensity focused ultrasound (HIFU) and extracorporeal shock wave therapy (ECWT) are two therapeutic US modalities which have been investigated for treating cardiac arrhythmias and ischemic heart disease, respectively. Here, we review the biomechanical effects of HIFU and ECWT, their potential therapeutic mechanisms, and pre-clinical and clinical studies demonstrating their efficacy and safety limitations. Furthermore, we discuss other potential clinical applications of therapeutic US and areas in which future research is needed.
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Affiliation(s)
- Babak Nazer
- Division of Cardiology, University of California San Francisco, 505 Parnassus Avenue, Room M1184, San Francisco, CA, 94143-0124, USA,
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339
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Yin Q, Shen J, Zhang Z, Yu H, Li Y. Reversal of multidrug resistance by stimuli-responsive drug delivery systems for therapy of tumor. Adv Drug Deliv Rev 2013; 65:1699-715. [PMID: 23611952 DOI: 10.1016/j.addr.2013.04.011] [Citation(s) in RCA: 286] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 02/01/2013] [Accepted: 04/13/2013] [Indexed: 12/15/2022]
Abstract
Multidrug resistance (MDR) is a major obstacle to successful cancer therapy, especially for chemotherapy. The new drug delivery system (DDS) provides promising approaches to reverse MDR, for which the poor cellular uptake and insufficient intracellular drug release remain rate-limiting steps for reaching the drug concentration level within the therapeutic window. Stimulus-coupled drug delivery can control the drug-releasing pattern temporally and spatially, and improve the accumulation of chemotherapeutic agents at targeting sites. In this review, the applications of DDS which is responsive to different types of stimuli in MDR cancer therapy is introduced, and the design, construction, stimuli-sensitivity and the effect to reverse MDR of the stimuli-responsive DDS are discussed.
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340
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Thakkar D, Gupta R, Monson K, Rapoport N. Effect of ultrasound on the permeability of vascular wall to nano-emulsion droplets. ULTRASOUND IN MEDICINE & BIOLOGY 2013; 39:1804-11. [PMID: 23849384 PMCID: PMC3777764 DOI: 10.1016/j.ultrasmedbio.2013.04.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/08/2013] [Accepted: 04/11/2013] [Indexed: 05/10/2023]
Abstract
The effect of ultrasound on the permeability of blood vessels to nano-emulsion droplets was investigated using excised mouse carotid arteries as model blood vessels. Perfluorocarbon nano-droplets were formed by perfluoro-15-crown-5-ether and stabilized by poly(ethylene oxide)-co-poly(DL-lactide) block co-polymer shells. Nano-droplet fluorescence was imparted by interaction with fluorescein isothiocyanate-dextran (molecular weight = 70,000 Da). The permeability of carotid arteries to nano-droplets was studied in the presence and absence of continuous wave or pulsed therapeutic 1-MHz ultrasound. The data indicated that the application of ultrasound resulted in permeabilization of the vascular wall to nano-droplets. The effect of continuous wave ultrasound was substantially stronger than that of pulsed ultrasound of the same total energy. No effect of blood vessel pre-treatment with ultrasound was observed.
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Affiliation(s)
- Dhaval Thakkar
- Department of Mechanical Engineering, University of Utah, Salt Lake City, Utah 84112, USA
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341
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Ding X, Li P, Lin SCS, Stratton ZS, Nama N, Guo F, Slotcavage D, Mao X, Shi J, Costanzo F, Huang TJ. Surface acoustic wave microfluidics. LAB ON A CHIP 2013; 13:3626-49. [PMID: 23900527 PMCID: PMC3992948 DOI: 10.1039/c3lc50361e] [Citation(s) in RCA: 422] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The recent introduction of surface acoustic wave (SAW) technology onto lab-on-a-chip platforms has opened a new frontier in microfluidics. The advantages provided by such SAW microfluidics are numerous: simple fabrication, high biocompatibility, fast fluid actuation, versatility, compact and inexpensive devices and accessories, contact-free particle manipulation, and compatibility with other microfluidic components. We believe that these advantages enable SAW microfluidics to play a significant role in a variety of applications in biology, chemistry, engineering and medicine. In this review article, we discuss the theory underpinning SAWs and their interactions with particles and the contacting fluids in which they are suspended. We then review the SAW-enabled microfluidic devices demonstrated to date, starting with devices that accomplish fluid mixing and transport through the use of travelling SAW; we follow that by reviewing the more recent innovations achieved with standing SAW that enable such actions as particle/cell focusing, sorting and patterning. Finally, we look forward and appraise where the discipline of SAW microfluidics could go next.
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Affiliation(s)
- Xiaoyun Ding
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Peng Li
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Sz-Chin Steven Lin
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Zackary S. Stratton
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Nitesh Nama
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Feng Guo
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Daniel Slotcavage
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Xiaole Mao
- Department of Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Jinjie Shi
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Francesco Costanzo
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA
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342
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Diniz PHGD, Fabián Pistonesi M, de Araújo MCU, Fernández Band BS. Eco-friendly sonoluminescent determination of free glycerol in biodiesel samples. Talanta 2013; 114:38-42. [DOI: 10.1016/j.talanta.2013.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 04/02/2013] [Accepted: 04/05/2013] [Indexed: 10/26/2022]
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343
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Chen H, Hwang JH. Ultrasound-targeted microbubble destruction for chemotherapeutic drug delivery to solid tumors. J Ther Ultrasound 2013; 1:10. [PMID: 25512858 PMCID: PMC4265893 DOI: 10.1186/2050-5736-1-10] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 04/02/2013] [Indexed: 12/21/2022] Open
Abstract
Ultrasound-targeted microbubble destruction (UTMD) is a promising technique for non-invasive, targeted drug delivery, and its applications in chemotherapeutic drug delivery to solid tumors have attracted growing interest. Ultrasound, which has been conventionally used for diagnostic imaging, has evolved as a promising tool for therapeutic applications mainly because of its ability to be focused deep inside the human body, providing a modality for targeted delivery. Although originally being introduced into clinics as ultrasound contrast agents, microbubbles (MBs) have been developed as a diagnostic and therapeutic agent that can both be tracked through non-invasive imaging and deliver therapeutic agents selectively at ultrasound-targeted locations. Whereas free drugs often possess harmful side effects, their encapsulation in MBs and subsequent local release at the targeted tissue by ultrasound triggering may help improve the margin of safety. In the past 10 years, the feasibility and safety of UTMD have been extensively tested using normal animal models. Most recently, a growing number of preclinical studies have been reported on the therapeutic benefits of UTMD in the delivery of chemotherapeutic drugs to various malignant tumors, such as brain, liver, eyelid, pancreas, and breast tumors. Increased drug concentration in tumors and reduced tumor sizes were achieved in those tumors treated with UTMD in combination with chemotherapeutic drugs, when compared to tumors treated with chemotherapy drugs alone. This review presents an overview of current preclinical applications of UTMD in chemotherapeutic drug delivery for the treatment of cancers along with a discussion of its future developments.
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Affiliation(s)
- Hong Chen
- Division of Gastroenterology, Department of Medicine, University of Washington, 1959 NE Pacific St, Seattle, WA 98195, USA
| | - Joo Ha Hwang
- Division of Gastroenterology, Department of Medicine, University of Washington, 1959 NE Pacific St, Seattle, WA 98195, USA
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344
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Noble ML, Kuhr CS, Graves SS, Loeb KR, Sun SS, Keilman GW, Morrison KP, Paun M, Storb RF, Miao CH. Ultrasound-targeted microbubble destruction-mediated gene delivery into canine livers. Mol Ther 2013; 21:1687-94. [PMID: 23732985 DOI: 10.1038/mt.2013.107] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 04/24/2013] [Indexed: 12/16/2022] Open
Abstract
Ultrasound (US) was applied to a targeted canine liver lobe simultaneously with injection of plasmid DNA (pDNA)/microbubble (MB) complexes into a portal vein (PV) segmental branch and occlusion of the inferior vena cava (IVC) to facilitate DNA uptake. By using a 1.1 MHz, 13 mm diameter transducer, a fivefold increase in luciferase activity was obtained at 3.3 MPa peak negative pressure (PNP) in the treated lobe. For more effective treatment of large tissue volumes in canines, a planar unfocused transducer with a large effective beam diameter (52 mm) was specifically constructed. Its apodized dual element configuration greatly reduced the near-field transaxial pressure variations, resulting in a remarkably uniform field of US exposure for the treated tissues. Together with a 15 kW capacity US amplifier, a 692-fold increase of gene expression was achieved at 2.7 MPa. Transaminase and histology analysis indicated minimal tissue damage. These experiments represent an important developmental step toward US-mediated gene delivery in large animals and clinics.
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Affiliation(s)
- Misty L Noble
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Washington 98101, USA
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345
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Abstract
OPINION STATEMENT Acute ischemic stroke remains one of the most devastating diseases when it comes to morbidity and mortality, not to mention the personal and economic burden that occurs in long-term. Intravenous thrombolysis with tissue plasminogen activator (tPA) is the only effective acute stroke therapy that improves outcome if given up to 4.5 hours from symptom onset. However, recanalization rates are meager and the majority of treated patients still have residual disability after stroke, emphasizing the need for further treatment options that may facilitate or even rival the only approved therapy. Sonothrombolysis, the adjuvant continuous ultrasound sonication of an intra-arterial occlusive thrombus during thrombolysis, enhances the clot-dissolving capabilities of intravenous tPA presumably by delivering acoustic pressure to the target brain vessel. Higher recanalization rates produce a trend towards better functional outcomes that could be safely achieved with the combination of high-frequency ultrasound and intravenous tPA. However, data on ultrasound targeting of intracranial proximal occlusive lesions other than those in the middle cerebral arteries are sparse. Moreover, recent sonothrombolysis trials were exclusively conducted with operator-dependent hand-held technology hindering its further testing in clinical sonothrombolysis trials. An operator-independent 2-MHz transcranial Doppler device has been developed allowing health care professionals not formally trained in ultrasound apparatus to provide therapeutic ultrasound as needed. Currently, this operator-independent device covering 12 proximal intracranial segments that most commonly contain thrombo-embolic occlusions enters testing in a pivotal multicenter sonothrombolysis efficacy trial. If this trial demonstrates safety and efficacy, adjuvants, such as gaseous microbubbles that further potentiate the thrombolytic effect of intravenous tPA, could be tested along with this device.
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346
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Wang YN, Khokhlova T, Bailey M, Hwang JH, Khokhlova V. Histological and biochemical analysis of mechanical and thermal bioeffects in boiling histotripsy lesions induced by high intensity focused ultrasound. ULTRASOUND IN MEDICINE & BIOLOGY 2013; 39:424-38. [PMID: 23312958 PMCID: PMC3570648 DOI: 10.1016/j.ultrasmedbio.2012.10.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/10/2012] [Accepted: 10/15/2012] [Indexed: 05/07/2023]
Abstract
Recent studies have shown that shockwave heating and millisecond boiling in high-intensity focused ultrasound fields can result in mechanical fractionation or emulsification of tissue, termed boiling histotripsy. Visual observations of the change in color and contents indicated that the degree of thermal damage in the emulsified lesions can be controlled by varying the parameters of the exposure. The goal of this work was to examine thermal and mechanical effects in boiling histotripsy lesions using histologic and biochemical analysis. The lesions were induced in ex vivo bovine heart and liver using a 2-MHz single-element transducer operating at duty factors of 0.005-0.01, pulse durations of 5-500 ms and in situ shock amplitude of 73 MPa. Mechanical and thermal damage to tissue was evaluated histologically using conventional staining techniques (hematoxylin and eosin, and nicotinamide adenine dinucleotide-diaphorase). Thermal effects were quantified by measuring denaturation of salt soluble proteins in the treated region. According to histologic analysis, the lesions that visually appeared as a liquid contained no cellular structures larger than a cell nucleus and had a sharp border of one to two cells. Both histologic and protein analysis showed that lesions obtained with short pulses (<10 ms) did not contain any thermal damage. Increasing the pulse duration resulted in an increase in thermal damage. However, both protein analysis and nicotinamide adenine dinucleotide-diaphorase staining showed less denaturation than visually observed as whitening of tissue. The number of high-intensity focused ultrasound pulses delivered per exposure did not change the lesion shape or the degree of thermal denaturation, whereas the size of the lesion showed a saturating behavior suggesting optimal exposure duration. This study confirmed that boiling histotripsy offers an effective, predictable way to non-invasively fractionate tissue into sub-cellular fragments with or without inducing thermal damage.
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Affiliation(s)
- Yak-Nam Wang
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle WA 98105
| | - Tatiana Khokhlova
- , Tel: +1 206 543 61 93, Fax: +1 206 543 67 85, Division of Gastroenterology, Department of Medicine, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98195 and Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle WA 98105
| | - Michael Bailey
- Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle WA 98105
| | - Joo Ha Hwang
- Division of Gastroenterology, Department of Medicine, University of Washington, 1959 NE Pacific Street, Seattle, WA, 98195 and Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle WA 98105
| | - Vera Khokhlova
- Department of Acoustics, Physics Faculty, Moscow State University, Leninskie Gory, Moscow 119991, Russia and Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Seattle WA 98105
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347
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Bawiec CR, Sunny Y, Nguyen AT, Samuels JA, Weingarten MS, Zubkov LA, Lewin PA. Finite element static displacement optimization of 20-100 kHz flexural transducers for fully portable ultrasound applicator. ULTRASONICS 2013; 53:511-7. [PMID: 23040829 PMCID: PMC3568635 DOI: 10.1016/j.ultras.2012.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 09/05/2012] [Accepted: 09/06/2012] [Indexed: 05/09/2023]
Abstract
This paper focuses on the development of a finite-element model and subsequent stationary analysis performed to optimize individual flexural piezoelectric elements for operation in the frequency range of 20-100kHz. These elements form the basic building blocks of a viable, un-tethered, and portable ultrasound applicator that can produce intensities on the order of 100mW/cm(2) spatial-peak temporal-peak (I(SPTP)) with minimum (on the order of 15V) excitation voltage. The ultrasound applicator can be constructed with different numbers of individual transducer elements and different geometries such that its footprint or active area is adjustable. The primary motivation behind this research was to develop a tether-free, battery operated, fully portable ultrasound applicator for therapeutic applications such as wound healing and non-invasive transdermal delivery of both naked and encapsulated drugs. It is shown that careful selection of the components determining applicator architecture allows the displacement amplitude to be maximized for a specific frequency of operation. The work described here used the finite-element analysis software COMSOL to identify the geometry and material properties that permit the applicator's design to be optimized. By minimizing the excitation voltage required to achieve the desired output (100mW/cm(2)I(SPTP)) the power source (rechargeable Li-Polymer batteries) size may be reduced permitting both the electronics and ultrasound applicator to fit in a wearable housing.
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Affiliation(s)
- Christopher R Bawiec
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
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