1
|
Pan X, Huang W, Nie G, Wang C, Wang H. Ultrasound-Sensitive Intelligent Nanosystems: A Promising Strategy for the Treatment of Neurological Diseases. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2303180. [PMID: 37871967 DOI: 10.1002/adma.202303180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 09/26/2023] [Indexed: 10/25/2023]
Abstract
Neurological diseases are a major global health challenge, affecting hundreds of millions of people worldwide. Ultrasound therapy plays an irreplaceable role in the treatment of neurological diseases due to its noninvasive, highly focused, and strong tissue penetration capabilities. However, the complexity of brain and nervous system and the safety risks associated with prolonged exposure to ultrasound therapy severely limit the applicability of ultrasound therapy. Ultrasound-sensitive intelligent nanosystems (USINs) are a novel therapeutic strategy for neurological diseases that bring greater spatiotemporal controllability and improve safety to overcome these challenges. This review provides a detailed overview of therapeutic strategies and clinical advances of ultrasound in neurological diseases, focusing on the potential of USINs-based ultrasound in the treatment of neurological diseases. Based on the physical and chemical effects induced by ultrasound, rational design of USINs is a prerequisite for improving the efficacy of ultrasound therapy. Recent developments of ultrasound-sensitive nanocarriers and nanoagents are systemically reviewed. Finally, the challenges and developing prospects of USINs are discussed in depth, with a view to providing useful insights and guidance for efficient ultrasound treatment of neurological diseases.
Collapse
Affiliation(s)
- Xueting Pan
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Wenping Huang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guangjun Nie
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Changyong Wang
- Beijing Institute of Basic Medical Sciences, 27 Taiping Road, Beijing, 100850, China
| | - Hai Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
2
|
Gaikwad SS, Zanje AL, Somwanshi JD. Advancements in transdermal drug delivery: A comprehensive review of physical penetration enhancement techniques. Int J Pharm 2024; 652:123856. [PMID: 38281692 DOI: 10.1016/j.ijpharm.2024.123856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/12/2024] [Accepted: 01/24/2024] [Indexed: 01/30/2024]
Abstract
Transdermal drug administration has grown in popularity in the pharmaceutical research community due to its potential to improve drug bioavailability, compliance among patients, and therapeutic effectiveness. To overcome the substantial barrier posed by the stratum corneum (SC) and promote drug absorption within the skin, various physical penetration augmentation approaches have been devised. This review article delves into popular physical penetration augmentation techniques, which include sonophoresis, iontophoresis, magnetophoresis, thermophoresis, needle-free injection, and microneedles (MNs) Sonophoresis is a technique that uses low-frequency ultrasonic waves to break the skin's barrier characteristics, therefore improving drug transport and distribution. In contrast, iontophoresis uses an applied electric current to push charged molecules of drugs inside the skin, effectively enhancing medication absorption. Magnetophoresis uses magnetic fields to drive drug carriers into the dermis, a technology that has shown promise in aiding targeted medication delivery. Thermophoresis is the regulated heating of the skin in order to improve drug absorption, particularly with thermally sensitive drug carriers. Needle-free injection technologies, such as jet injectors (JIs) and microprojection arrays, offer another option by producing temporary small pore sizes in the skin, facilitating painless and effective drug delivery. MNs are a painless, minimally invasive method, easy to self-administration, as well as high drug bioavailability. This study focuses on the underlying processes, current breakthroughs, and limitations connected with all of these approaches, with an emphasis on their applicability in diverse therapeutic areas. Finally, a thorough knowledge of these physical enhancement approaches and their incorporation into pharmaceutical research has the potential to revolutionize drug delivery, providing more efficient and secure treatment choices for a wide range of health-related diseases.
Collapse
Affiliation(s)
- Sachin S Gaikwad
- Department of Pharmaceutics, Sanjivani College of Pharmaceutical Education and Research, Savitribai Phule Pune University, At Sahajanandnagar, Post-Shinganapur, Tal-Kopargaon, Dist-Ahmednagar, Maharashtra 423603, India.
| | - Abhijit L Zanje
- Department of Pharmaceutics, Sanjivani College of Pharmaceutical Education and Research, Savitribai Phule Pune University, At Sahajanandnagar, Post-Shinganapur, Tal-Kopargaon, Dist-Ahmednagar, Maharashtra 423603, India
| | - Jeevan D Somwanshi
- Department of Pharmaceutics, Sanjivani College of Pharmaceutical Education and Research, Savitribai Phule Pune University, At Sahajanandnagar, Post-Shinganapur, Tal-Kopargaon, Dist-Ahmednagar, Maharashtra 423603, India
| |
Collapse
|
3
|
Park JR, Kim G, Won J, Kim CW, Park D. Evaluation of Doxorubicin-loaded Echogenic Macroemulsion for Targeted Drug Delivery. Curr Drug Deliv 2024; 21:785-793. [PMID: 37016528 DOI: 10.2174/1567201820666230403111118] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/26/2023] [Accepted: 02/06/2023] [Indexed: 04/06/2023]
Abstract
BACKGROUND The latest technology trend in targeted drug delivery highlights stimuliresponsive particles that can release an anticancer drug in a solid tumor by responding to external stimuli. OBJECTIVE This study aims to design, fabricate, and evaluate an ultrasound-responsive drug delivery vehicle for an ultrasound-mediated drug delivery system. METHODS The drug-containing echogenic macroemulsion (eME) was fabricated by an emulsification method using the three phases (aqueous lipid solution as a shell, doxorubicin (DOX) contained oil, and perfluorohexane (PFH) as an ultrasound-responsive agent). The morphological structure of eMEs was investigated using fluorescence microscopy, and the size distribution was analyzed by using DLS. The echogenicity of eME was measured using a contrast-enhanced ultrasound device. The cytotoxicity was evaluated using a breast cancer cell (MDA-MB-231) via an in vitro cell experiment. RESULTS The obtained eME showed an ideal morphological structure that contained both DOX and PFH in a single particle and indicated a suitable size for enhancing ultrasound response and avoiding complications in the blood vessel. The echogenicity of eME was demonstrated via an in vitro experiment, with results showcasing the potential for targeted drug delivery. Compared to free DOX, enhanced cytotoxicity and improved drug delivery efficiency in a cancer cell were proven by using DOX-loaded eMEs and ultrasound. CONCLUSION This study established a platform technology to fabricate the ultrasound-responsive vehicle. The designed drug-loaded eME could be a promising platform with ultrasound technology for targeted drug delivery.
Collapse
Affiliation(s)
- Jong-Ryul Park
- BioInfra Life Science Inc., 524, Cancer Research Institute, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul, 03080, South Korea
| | - Gayoung Kim
- BioInfra Life Science Inc., 524, Cancer Research Institute, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul, 03080, South Korea
| | - Jongho Won
- BioInfra Life Science Inc., 524, Cancer Research Institute, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul, 03080, South Korea
| | - Chul-Woo Kim
- BioInfra Life Science Inc., 524, Cancer Research Institute, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul, 03080, South Korea
| | - Donghee Park
- BioInfra Life Science Inc., 524, Cancer Research Institute, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, Seoul, 03080, South Korea
| |
Collapse
|
4
|
Lyons B, Balkaran JPR, Dunn-Lawless D, Lucian V, Keller SB, O’Reilly CS, Hu L, Rubasingham J, Nair M, Carlisle R, Stride E, Gray M, Coussios C. Sonosensitive Cavitation Nuclei-A Customisable Platform Technology for Enhanced Therapeutic Delivery. Molecules 2023; 28:7733. [PMID: 38067464 PMCID: PMC10708135 DOI: 10.3390/molecules28237733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 12/18/2023] Open
Abstract
Ultrasound-mediated cavitation shows great promise for improving targeted drug delivery across a range of clinical applications. Cavitation nuclei-sound-sensitive constructs that enhance cavitation activity at lower pressures-have become a powerful adjuvant to ultrasound-based treatments, and more recently emerged as a drug delivery vehicle in their own right. The unique combination of physical, biological, and chemical effects that occur around these structures, as well as their varied compositions and morphologies, make cavitation nuclei an attractive platform for creating delivery systems tuned to particular therapeutics. In this review, we describe the structure and function of cavitation nuclei, approaches to their functionalization and customization, various clinical applications, progress toward real-world translation, and future directions for the field.
Collapse
Affiliation(s)
- Brian Lyons
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Joel P. R. Balkaran
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Darcy Dunn-Lawless
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Veronica Lucian
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Sara B. Keller
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Colm S. O’Reilly
- Botnar Research Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford OX1 3PJ, UK;
| | - Luna Hu
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Jeffrey Rubasingham
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Malavika Nair
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Robert Carlisle
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Eleanor Stride
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Michael Gray
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| | - Constantin Coussios
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, UK; (J.P.R.B.); (D.D.-L.); (V.L.); (S.B.K.); (L.H.); (J.R.); (M.N.); (R.C.); (E.S.); (M.G.)
| |
Collapse
|
5
|
Pereira TA, Ramos DN, Sobral LM, Martins YA, Petrilli R, Fantini MDAC, Leopoldino AM, Lopez RFV. Liquid crystalline nanogel targets skin cancer via low-frequency ultrasound treatment. Int J Pharm 2023; 646:123431. [PMID: 37739094 DOI: 10.1016/j.ijpharm.2023.123431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 09/05/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
The potential of low-frequency ultrasound (LFU) combined with nanotechnology-based formulations in improving skin tumors topical treatment was investigated. The impact of solid lipid nanoparticles (SLN) and hydrophilic nanogels as coupling media on LFU-induced skin localized transport regions (LTR) and the penetration of doxorubicin (DOX) in LFU-pretreated skin was evaluated. SLN were prepared by the microemulsion technique and liquid crystalline nanogels using Poloxamer. In vitro, the skin was pretreated with LFU until skin resistivity of ∼1 KΩ.cm2 using the various coupling media followed by evaluation of DOX penetration from DOX-nanogel and SLN-DOX in skin layers. Squamous cell carcinoma (SCC) induced in mice was LFU-treated using the nanogel with the LFU tip placed 5 mm or 10 mm from the tumor surface, followed by DOX-nanogel application. LFU with nanogel coupling achieved larger LTR areas than LFU with SLN coupling. In LFU-pretreated skin, DOX-nanogel significantly improved drug penetration to the viable epidermis, while SLN-DOX hindered drug transport through LTR. In vivo, LFU-nanogel pretreatment with the 10 mm tip distance induced significant tumor inhibition and reduced tumor cell numbers and necrosis. These findings suggest the importance of optimizing nanoparticle-based formulations and LFU parameters for the clinical application of LFU technology in skin tumor treatment.
Collapse
Affiliation(s)
- Tatiana Aparecida Pereira
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| | - Danielle Nishida Ramos
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| | - Lays Martin Sobral
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| | - Yugo Araújo Martins
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| | - Raquel Petrilli
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil; Institute of Health Sciences, University of International Integration of the Afro-Brazilian Lusophony, Redenção, Brazil.
| | | | - Andréia Machado Leopoldino
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| | - Renata Fonseca Vianna Lopez
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Av. Cafe s/n, 14040-903 Ribeirao Preto, SP, Brazil.
| |
Collapse
|
6
|
Berbille A, Li XF, Su Y, Li S, Zhao X, Zhu L, Wang ZL. Mechanism for Generating H 2 O 2 at Water-Solid Interface by Contact-Electrification. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304387. [PMID: 37487242 DOI: 10.1002/adma.202304387] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/17/2023] [Indexed: 07/26/2023]
Abstract
The recent intensification of the study of contact-electrification at water-solid interfaces and its role in physicochemical processes lead to the realization that electron transfers during water-solid contact-electrification can drive chemical reactions. This mechanism, named contact-electro-catalysis (CEC), allows chemically inert fluorinated polymers to act like single electrode electrochemical systems. This study shows hydrogen peroxide (H2 O2 ) is generated from air and deionized water, by ultrasound driven CEC, using fluorinated ethylene propylene (FEP) as the catalyst. For a mass ratio of catalyst to solution of 1:10000, at 20 °C, the kinetic rate of H2 O2 evolution reaches 58.87 mmol L-1 gcat -1 h-1 . Electron paramagnetic resonance (EPR) shows electrons are emitted in the solution by the charged FEP, during ultrasonication. EPR and isotope labelling experiments show H2 O2 is formed from hydroxyl radicals (HO• ) or two superoxide radicals (O2 •- ) generated by CEC. Finally, it is traditionally believed such radicals migrate in the solution by Brownian diffusion prior to reactions. However, ab-initio molecular dynamic calculations reveal the radicals can react by exchanging protons and electrons through the hydrogen bonds network of water, i.e., owing to the Grotthuss mechanism. This mechanism can be relevant to other systems, artificial or natural, generating H2 O2 from air and water.
Collapse
Affiliation(s)
- Andy Berbille
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Fen Li
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- China Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Yusen Su
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shunning Li
- School of Advanced Materials, Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Xin Zhao
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
| | - Laipan Zhu
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhong Lin Wang
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
- Yonsei Frontier Lab, Yonsei University, Seoul, 03722, Republic of Korea
| |
Collapse
|
7
|
Zhang Y, Wu W, Wang J, Zhai W, Wei B. In-situ observation of phase separation dynamics for immiscible aqueous solution within ultrasonic field. ULTRASONICS SONOCHEMISTRY 2023; 100:106634. [PMID: 37820413 PMCID: PMC10571028 DOI: 10.1016/j.ultsonch.2023.106634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/24/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023]
Abstract
A high-speed imaging technique was used to observe the phase separation process of water (H2O)-20 %succinonitrile (SCN) immiscible solution within ultrasound field. Combining with numerical simulation, the effects of ultrasonic cavitation and acoustic streaming on the fragmentation and migration of secondary droplets were revealed. It was found that the previously spherical or near-spherical secondary H2O-rich droplets formed under static condition were dynamically transformed into several novel forms, such as tadpole-like, string-beads, gourd-like, and threadlike patterns. The calculated results showed that the cavitation could fragment micron-scale H2O-rich droplets because of the produced higher shock wave pressure than the droplets' Laplace pressure, and the subsequent droplet morphology evolution mainly depended on the liquid ejection volume determined by the distance between the droplets and the collapsing bubbles. Meanwhile, acoustic streaming, which generated shear force exceeding the surface tension of H2O-rich phase, stretched, split and finally fractured millimeter-sized or even larger secondary droplets into several smaller spherical sub-droplets. In comparison, the observed secondary droplet distribution characteristics in H2O-20 %SCN solution were similar to the Bi-rich particles in the ultrasonic solidification microstructures of Al-30 %Bi immiscible alloy, confirming that this work provided a deep understanding of the liquid phase separation mechanism within ultrasonic field.
Collapse
Affiliation(s)
- Ying Zhang
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, PR China
| | - Wenhua Wu
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, PR China
| | - Jianyuan Wang
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, PR China
| | - Wei Zhai
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, PR China.
| | - Bingbo Wei
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, PR China
| |
Collapse
|
8
|
Dheyab MA, Aziz AA, Oladzadabbasabadi N, Alsaedi A, Braim FS, Jameel MS, Ramizy A, Alrosan M, Almajwal AM. Comparative Analysis of Stable Gold Nanoparticles Synthesized Using Sonochemical and Reduction Methods for Antibacterial Activity. Molecules 2023; 28:molecules28093931. [PMID: 37175341 PMCID: PMC10179926 DOI: 10.3390/molecules28093931] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/25/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
The increasing bacterial resistance and negative impacts of the present antibacterial agents have led to the search for novel antibacterial agents. This study focuses on the influence of synthetic methods on the aggregation stability and antibacterial activity of gold nanoparticles (NPs) prepared by using sodium citrate as a reducing and capping agent against Staphylococcus aureus (S. aureus). Gold NPs were synthesized using a simple and rapid sonochemical method and compared to gold NPs synthesized using a reduction method. The physicochemical features of gold NPs were characterized using UV-vis, XRD, TEM, and zeta potential, and the TEM results showed that the sonochemical method produced monodispersed spherical gold NPs with an average diameter of 18.5 nm, while the reduction method produced NPs with an average diameter of around 20 nm. The sonochemical method produced gold NPs with excellent stability (-48 mV) compared to the reduction method (-21 mV). The gold NPs with high stability also exhibited strong antibacterial activity against S. aureus present in water, indicating their potential use in water purification processes to limit bacterial growth. The outcomes of this research are expected to significantly contribute to the creation of new drugs by paving the way for the development of novel strategies to combat pathogens using highly stable gold nanoparticles. These gold NPs, produced via the sonochemical method, have the potential to be employed as beneficial nanocompounds in the medical industry.
Collapse
Affiliation(s)
- Mohammed Ali Dheyab
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Department of Physics, College of Science, University of Anbar, Ramadi 31001, Iraq
- Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Azlan Abdul Aziz
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | | | - Alyaa Alsaedi
- School of Industrial Technology, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Farhank Saber Braim
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
- Department of Physics, College of Science, University of Anbar, Ramadi 31001, Iraq
- Department of Biomedical Sciences, Cihan University-Erbil, Erbil 44001, Iraq
| | - Mahmood S Jameel
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden 11800, Penang, Malaysia
| | - Asmeit Ramizy
- Department of Physics, College of Science, University of Anbar, Ramadi 31001, Iraq
| | - Mohammad Alrosan
- Applied Science Research Center, Applied Science Private University, Amman 11937, Jordan
| | - Ali Madi Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
| |
Collapse
|
9
|
Fernandes FAN, Rodrigues S. Ultrasound applications in drying of fruits from a sustainable development goals perspective. ULTRASONICS SONOCHEMISTRY 2023; 96:106430. [PMID: 37167783 DOI: 10.1016/j.ultsonch.2023.106430] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/20/2023] [Accepted: 05/01/2023] [Indexed: 05/13/2023]
Abstract
This review focuses on the many contributions of ultrasound technologies for fruit drying toward the United Nations Sustainable Development Goals (SDG). Along this review, several aspects attained from the application of ultrasound technologies are correlated with the SDGs. The main ultrasonic technologies applied for fruit drying, such as ultrasonic bath, probe ultrasound, air-borne ultrasound air-drying, and ultrasound-assisted contact air-drying, are presented. An in-depth discussion on ultrasound contributions, its advantages, disadvantages, and limitations are made. The effects of ultrasound on water diffusivity in several fruits are presented by correlating this effect with drying time and cost of energy. Ultrasound-assisted fruit drying, like other food processing technologies, directly impacts Zero Hunger, but ultrasound technologies contribute to much more than delivering long shelf-life food. This technology can be used to produce healthy foods and provide well-being, which will be discussed by correlating the effects of ultrasound-assisted air-drying with the concentration of nutritional compounds. Ultrasound-assisted fruit drying reduces wastewater toxicity and energy consumption and improves productivity, potentially improving workplaces and salaries. A walk through the technology is presented from Zero Hunger to No Poverty.
Collapse
Affiliation(s)
- Fabiano A N Fernandes
- Universidade Federal do Ceará, Departamento de Engenharia Química, Campus do Pici, Bloco 709, 60440-900 Fortaleza, CE, Brazil.
| | - Sueli Rodrigues
- Universidade Federal do Ceará, Departamento de Engenharia de Alimentos, Campus do Pici, Bloco 858, 60440-900 Fortaleza, CE, Brazil
| |
Collapse
|
10
|
Ultrasonic cavitation bubble- and gas bubble-assisted fractional precipitation for the purification of (+)-dihydromyricetin. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1202-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
11
|
Kurashina Y, Asano R, Matsui M, Nomoto T, Ando K, Nakamura K, Nishiyama N, Kitamoto Y. Quantitative Analysis of Acoustic Pressure for Sonophoresis and Its Effect on Transdermal Penetration. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:933-944. [PMID: 35272891 DOI: 10.1016/j.ultrasmedbio.2022.01.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Ultrasound facilitates the penetration of macromolecular compounds through the skin and offers a promising non-invasive technique for transdermal delivery. However, technical difficulties in quantifying ultrasound-related parameters have restricted further analysis of the sonophoresis mechanism. In this study, we devise a bolt-clamped Langevin transducer-based sonophoresis device that enables us to measure with a thin lead zirconate titanate (PZT) sensor. One-dimensional acoustic theory accounting for wave interaction at the skin interface indicates that the acoustic pressure and cavitation onset on the skin during sonophoresis are sensitive to the subcutaneous support, meaning that there is a strong need to perform the pressure measurement in an experimental environment replacing the human body. From a series of the experiments with our new device, the transdermal penetration of polystyrene, silica and gold nanoparticles is found to depend on the size and material of the particles, as well as the hardness of the subcutaneous support material. We speculate from the acoustic pressure measurement that the particles' penetration results from the mechanical action of cavitation.
Collapse
Affiliation(s)
- Yuta Kurashina
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan.
| | - Risa Asano
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| | - Makoto Matsui
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| | - Takahiro Nomoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| | - Keita Ando
- Department of Mechanical Engineering, Faculty of Science and Technology, Keio University, Kohoku-ku, Yokohama, Japan
| | - Kentaro Nakamura
- Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| | - Nobuhiro Nishiyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| | - Yoshitaka Kitamoto
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Midori-Ku, Yokohama, Japan
| |
Collapse
|
12
|
Negative pressure cavitation fractional precipitation for the purification of paclitaxel from Taxus chinensis. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-0959-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
13
|
Tu L, Liao Z, Luo Z, Wu Y, Herrmann A, Huo S. Ultrasound-controlled drug release and drug activation for cancer therapy. EXPLORATION (BEIJING, CHINA) 2021; 1:20210023. [PMID: 37323693 PMCID: PMC10190934 DOI: 10.1002/exp.20210023] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 12/02/2021] [Indexed: 06/15/2023]
Abstract
Traditional chemotherapy suffers from severe toxicity and side effects that limit its maximum application in cancer therapy. To overcome this challenge, an ideal treatment strategy would be to selectively control the release or regulate the activity of drugs to minimize the undesirable toxicity. Recently, ultrasound (US)-responsive drug delivery systems (DDSs) have attracted significant attention due to the non-invasiveness, high tissue penetration depth, and spatiotemporal controllability of US. Moreover, the US-induced mechanical force has been proven to be a robust method to site-selectively rearrange or cleave bonds in mechanochemistry. This review describes the US-activated DDSs from the fundamental basics and aims to present a comprehensive summary of the current understanding of US-responsive DDSs for controlled drug release and drug activation. First, we summarize the typical mechanisms for US-responsive drug release and drug activation. Second, the main factors affecting the ultrasonic responsiveness of drug carriers are outlined. Furthermore, representative examples of US-controlled drug release and drug activation are discussed, emphasizing their novelty and design principles. Finally, the challenges and an outlook on this promising therapeutic strategy are discussed.
Collapse
Affiliation(s)
- Li Tu
- Fujian Provincial Key Laboratory of Innovative Drug Target ResearchSchool of Pharmaceutical SciencesXiamen UniversityXiamenP. R. China
| | - Zhihuan Liao
- Fujian Provincial Key Laboratory of Innovative Drug Target ResearchSchool of Pharmaceutical SciencesXiamen UniversityXiamenP. R. China
| | - Zheng Luo
- Fujian Provincial Key Laboratory of Innovative Drug Target ResearchSchool of Pharmaceutical SciencesXiamen UniversityXiamenP. R. China
| | - Yun‐Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target ResearchSchool of Pharmaceutical SciencesXiamen UniversityXiamenP. R. China
| | - Andreas Herrmann
- DWI – Leibniz Institute for Interactive MaterialsAachenGermany
- Institute of Technical and Macromolecular ChemistryRWTH Aachen UniversityAachenGermany
| | - Shuaidong Huo
- Fujian Provincial Key Laboratory of Innovative Drug Target ResearchSchool of Pharmaceutical SciencesXiamen UniversityXiamenP. R. China
| |
Collapse
|
14
|
Zhang D, Chen B, Mu Q, Wang W, Liang K, Wang L, Wang Q. Topical delivery of gambogic acid assisted by the combination of low-frequency ultrasound and chemical enhancers for chemotherapy of cutaneous melanoma. Eur J Pharm Sci 2021; 166:105975. [PMID: 34391880 DOI: 10.1016/j.ejps.2021.105975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/30/2021] [Accepted: 08/10/2021] [Indexed: 10/20/2022]
Abstract
Anti-cutaneous melanoma activity of the skin-delivered gambogic acid (GA) has been reported in our previous study. However, it is difficult for GA to diffuse passively through intact skin without any enhancement means. In this study, a combination of chemical enhancers (EN: azone and propylene glycol) and physical ultrasound (US) was used to improve the percutaneous permeation of GA and enhance the anti-melanoma activity. The enhancement effect of the combination of EN and US (EN-US) on GA in vitro and in vivo was studied, and the enhancement mechanism and skin irritation were also evaluated. We showed that the parameters of US application at a constant frequency (30 kHz) with a duty cycle of 100% and intensity of 1.75 W/cm2 for 20 min were optimal. In vitro, EN-US showed a considerable enhancement of the permeation of GA, and the enhancement effect was stronger than that with the use of EN or US alone. In vivo antitumor study showed that the tumor growth was significantly inhibited after percutaneous administration of GA by EN-US, more than in the intravenous injection group. The penetration enhancement mechanism revealed that EN-US not only altered the structure of lipid bilayers and keratins to reduce the barrier effect of the stratum corneum but also produced diffusion channels in the skin under the cavitation effect of US, thereby promoting the skin penetration of GA. In addition, there was no observable skin irritation in mice after treatment with EN-US. Our study demonstrated that the combination of EN and US improved the skin permeation and retention of GA to enhance the anti-melanoma activity. This method also provides technical guidance for the future development of topical and transdermal therapeutic system of GA.
Collapse
Affiliation(s)
- Ding Zhang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China
| | - Boqi Chen
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China
| | - Qingke Mu
- School of Bioengineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Wei Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China
| | - Kaili Liang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China
| | - Liyan Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China
| | - Qing Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian, Liaoning 116024, China.
| |
Collapse
|
15
|
Ultrasonic cavitation bubble- and gas bubble-assisted adsorption of paclitaxel from Taxus chinensis onto Sylopute. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0852-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
16
|
Zhai H, Zhang C, Ou H, Chen M. Transdermal delivery of heparin using low-frequency sonophoresis in combination with sponge spicules for venous thrombosis treatment. Biomater Sci 2021; 9:5612-5625. [PMID: 34254062 DOI: 10.1039/d1bm00703c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study reports that the use of low-frequency sonophoresis (LFS) in combination with sponge Haliclona sp. spicules (SHS), referred to as cSoSp (combined Sonophoresis and Spicules), can enhance the transdermal drug delivery in a synergistic manner. The topical application of cSoSp in vitro significantly enhanced the skin absorption of Fluorescent-Dextrans (4000 Da, FD-4K), a model drug of low-molecular-weight heparin (LMWH). The utilization of cSoSp dramatically increased the transdermal flux of FD-4K (188.6 ± 93.7 ng cm-2 h-1) compared to LFS (5.8 ± 3.1 ng cm-2 h-1) and SHS (3.2 ± 1.2 ng cm-2 h-1) among others. The mechanism of action of cSoSp could be attributed to the synergism between plenty of long-lasting nano-channels created by SHS and the disorders of SC lipids made by shock waves of LFS, which improves the homogeneity of the cavitation effects. Furthermore, LMWH (3000 Da) was transdermally delivered by using cSoSp to treat both superficial venous thrombosis (SVT) and deep venous thrombosis (DVT) in the marginal ear vein of rabbits with a good therapeutic effect. Furthermore, skin irritation and toxicity studies using guinea pigs indicated that cSoSp was nonirritating without any morphological changes in the keratinocytes. cSoSp offers a promising strategy to enhance the transdermal delivery of hydrophilic macromolecules such as heparin.
Collapse
Affiliation(s)
- Haojie Zhai
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China.
| | - Chi Zhang
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China.
| | - Huilong Ou
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China.
| | - Ming Chen
- Department of Marine Biological Science & Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China. and State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Xiamen University, Xiamen 361102, China and Shenzhen Research Institute of Xiamen University, Shenzhen 518000, China
| |
Collapse
|
17
|
Martínez-Segoviano IDJ, Ganem-Rondero A. Enhancement of the transdermal delivery of zidovudine by pretreating the skin with two physical enhancers: microneedles and sonophoresis. ACTA ACUST UNITED AC 2021; 29:279-290. [PMID: 34216369 DOI: 10.1007/s40199-021-00402-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 05/25/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Zidovudine (AZT) has been the most widely used drug for antiretroviral therapy. In order to improve the therapy with this drug, different alternatives have been proposed, such as the transdermal administration. The use of permeation enhancers is necessary to favor the passage of this drug through the skin, due to its physicochemical properties and to the natural permeation barrier imposed by the skin. OBJECTIVES To evaluate the effect of two permeation enhancers, sonophoresis and microneedles, on the permeability of AZT through the skin. METHODS Permeation studies with an AZT solution were performed using pigskin clamped in Franz-type cells. Sonophoresis was applied under different conditions (i.e., amplitude, duty cycle and application time), selected according to an experimental design, where the response variables were the increase in temperature of the skin surface and the increase in transepidermal water loss. ATR-FTIR was also used to demonstrate the effect of enhancers on membrane components. RESULTS The permeability of AZT through intact skin was very poor, with a very long lag time. Pretreatment of the skin with sonophoresis increased AZT transport significantly, reducing the lag time. The maximum flux (27.52 µgcm-2 h-1) and the highest total amount permeated (about 624 µg/cm2) were obtained when applying sonophoresis in continuous mode, with an amplitude of 20%, and an application time of 2 min. Sonophoresis appears to have an impact on stratum corneum proteins. The use of microneedles further increased the flux (30.41 µgcm-2 h-1) and the total amount permeated (about 916 µg/cm2), relative to sonophoresis. CONCLUSION The results are encouraging in terms of promoting AZT transport through the skin using sonophoresis or microneedles as permeation enhancers.
Collapse
Affiliation(s)
- Irene de Jesús Martínez-Segoviano
- División de Estudios de Posgrado (Tecnología Farmacéutica), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Av. 1o de Mayo s/n, 54740, Cuautitlán Izcalli, Estado de México, Mexico
| | - Adriana Ganem-Rondero
- División de Estudios de Posgrado (Tecnología Farmacéutica), Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Av. 1o de Mayo s/n, 54740, Cuautitlán Izcalli, Estado de México, Mexico.
| |
Collapse
|
18
|
A comprehensive review of membrane fouling and cleaning methods with emphasis on ultrasound-assisted fouling control processes. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0832-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
19
|
Nadia Ahmad NF, Nik Ghazali NN, Wong YH. Wearable patch delivery system for artificial pancreas health diagnostic-therapeutic application: A review. Biosens Bioelectron 2021; 189:113384. [PMID: 34090154 DOI: 10.1016/j.bios.2021.113384] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 12/13/2022]
Abstract
The advanced stimuli-responsive approaches for on-demand drug delivery systems have received tremendous attention as they have great potential to be integrated with sensing and multi-functional electronics on a flexible and stretchable single platform (all-in-one concept) in order to develop skin-integration with close-loop sensation for personalized diagnostic and therapeutic application. The wearable patch pumps have evolved from reservoir-based to matrix patch and drug-in-adhesive (single-layer or multi-layer) type. In this review, we presented the basic requirements of an artificial pancreas, surveyed the design and technologies used in commercial patch pumps available on the market and provided general information about the latest wearable patch pump. We summarized the various advanced delivery strategies with their mechanisms that have been developed to date and representative examples. Mechanical, electrical, light, thermal, acoustic and glucose-responsive approaches on patch form have been successfully utilized in the controllable transdermal drug delivery manner. We highlighted key challenges associated with wearable transdermal delivery systems, their research direction and future development trends.
Collapse
Affiliation(s)
- Nur Farrahain Nadia Ahmad
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Nik Nazri Nik Ghazali
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Yew Hoong Wong
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| |
Collapse
|
20
|
Ali Dheyab M, Aziz AA, Jameel MS. Recent Advances in Inorganic Nanomaterials Synthesis Using Sonochemistry: A Comprehensive Review on Iron Oxide, Gold and Iron Oxide Coated Gold Nanoparticles. Molecules 2021; 26:2453. [PMID: 33922347 PMCID: PMC8122858 DOI: 10.3390/molecules26092453] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/06/2021] [Accepted: 04/19/2021] [Indexed: 12/11/2022] Open
Abstract
Sonochemistry uses ultrasound to improve or modify chemical reactions. Sonochemistry occurs when the ultrasound causes chemical effects on the reaction system, such as the formation of free radicals, that intensify the reaction. Many studies have investigated the synthesis of nanomaterials by the sonochemical method, but there is still very limited information on the detailed characterization of these physicochemical and morphological nanoparticles. In this comprehensive review, recent advances in the sonochemical synthesis of nanomaterials based on iron oxide nanoparticles (Fe3O4NP), gold nanoparticles (AuNP) and iron oxide-coated gold nanoparticles (Fe3O4@Au NP) are discussed. These materials are the most studied materials for various applications, such as medical and commercial uses. This review will: (1) address the simple processing and observations on the principles of sonochemistry as a starting point for understanding the fundamental mechanisms, (2) summarize and review the most relevant publications and (3) describe the typical shape of the products provided in sonochemistry. All in all, this review's main outcome will provide a comprehensive overview of the available literature knowledge that promotes and encourages future sonochemical work.
Collapse
Affiliation(s)
- Mohammed Ali Dheyab
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia;
- Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia
| | - Azlan Abdul Aziz
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia;
- Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia
| | - Mahmood S. Jameel
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia;
- Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, Pulau Pinang 11800, Malaysia
| |
Collapse
|
21
|
Ultrasound-based fractional precipitation for the purification of (+)-dihydromyricetin. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-020-0734-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Kang HJ, Kim JH. Cavitation bubble- and gas bubble-induced fractional precipitation of paclitaxel from Taxus chinensis. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Martins YA, Fonseca MJV, Pavan TZ, Lopez RFV. Bifunctional Therapeutic Application of Low-Frequency Ultrasound Associated with Zinc Phthalocyanine-Loaded Micelles. Int J Nanomedicine 2020; 15:8075-8095. [PMID: 33116519 PMCID: PMC7586016 DOI: 10.2147/ijn.s264528] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/24/2020] [Indexed: 12/22/2022] Open
Abstract
Purpose Sonodynamic therapy (SDT) is a new therapeutic modality for the noninvasive cancer treatment based on the association of ultrasound and sonosensitizer drugs. Topical SDT requires the development of delivery systems to properly transport the sonosensitizer, such as zinc phthalocyanine (ZnPc), to the skin. In addition, the delivery system itself can participate in sonodynamic events and influence the therapeutic response. This study aimed to develop ZnPc-loaded micelle to evaluate its potential as a topical delivery system and as a cavitational agent for low-frequency ultrasound (LFU) application with the dual purpose of promoting ZnPc skin penetration and generating reactive oxygen species (ROS) for SDT. Methods ZnPc-loaded micelles were developed by the thin-film hydration method and optimized using the Quality by Design approach. Micelles’ influence on LFU-induced cavitation activity was measured by potassium iodide dosimeter and aluminum foil pits experiments. In vitro skin penetration of ZnPc was assessed after pretreatment of the skin with LFU and simultaneous LFU treatment using ZnPc-loaded micelles as coupling media followed by 6 h of passive permeation of ZnPc-loaded micelles. The singlet oxygen generation by LFU irradiation of the micelles was evaluated using two different hydrophilic probes. The lipid peroxidation of the skin was estimated using the malondialdehyde assay after skin treatment with simultaneous LFU using ZnPc-loaded micelles. The viability of the B16F10 melanoma cell line was evaluated using resazurin after treatment with different concentrations of ZnPc-loaded micelles irradiated or not with LFU. Results The micelles increased the solubility of ZnPc and augmented the LFU-induced cavitation activity in two times compared to water. After 6 h ZnPc-loaded micelles skin permeation, simultaneous LFU treatment increased the amount of ZnPc in the dermis by more than 40 times, when compared to non-LFU-mediated treatment, and by almost 5 times, when compared to LFU pretreatment protocol. The LFU irradiation of micelles induced the generation of singlet oxygen, and the lipoperoxidation of the skin treated with the simultaneous LFU was enhanced in three times in comparison to the non-LFU-treated skin. A significant reduction in cell viability following treatment with ZnPc-loaded micelles and LFU was observed compared to blank micelles and non-LFU-treated control groups. Conclusion LFU-irradiated mice can be a potential approach to skin cancer treatment by combining the functions of increasing drug penetration and ROS generation required for SDT.
Collapse
Affiliation(s)
- Yugo A Martins
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
| | - Maria J V Fonseca
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
| | - Theo Z Pavan
- School of Philosophy, Sciences and Letters of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Sao Paulo, 14090-900, Brazil
| | - Renata F V Lopez
- School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, São Paulo, 14040-903, Brazil
| |
Collapse
|
24
|
Jameel MS, Aziz AA, Dheyab MA. Comparative analysis of platinum nanoparticles synthesized using sonochemical-assisted and conventional green methods. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2020.100484] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
25
|
Dheyab MA, Aziz AA, Jameel MS, Khaniabadi PM, Mehrdel B. Mechanisms of effective gold shell on Fe 3O 4 core nanoparticles formation using sonochemistry method. ULTRASONICS SONOCHEMISTRY 2020; 64:104865. [PMID: 31983562 DOI: 10.1016/j.ultsonch.2019.104865] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/04/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
Sonochemical synthesis (sonochemistry) is one of the most effective techniques of breaking down large clusters of nanoparticles (NPs) into smaller clusters or even individual NPs, which ensures their dispersibility (stability) in a solution over a long duration. This paper demonstrates the potential of sonochemistry becoming a valuable tool for the deposition of gold (Au) shell on iron oxide nanoparticles (Fe3O4 NPs) by explaining the underlying complex processes that control the deposition mechanism. This review summarizes the principles of the sonochemistry method and highlights the resulting phenomenon of acoustic cavitation and its associated physical, chemical and thermal effects. The effect of sonochemistry on the deposition of Au NPs on the Fe3O4 surface of various sizes is presented and discussed. A Vibra-Cell ultrasonic solid horn with tip size, frequency, power output of ½ inch, 20 kHz and 750 W respectively was used in core@shell synthesis. The sonochemical process was shown to affect the surface and structure of Fe3O4 NPs via acoustic cavitation, which prevents the agglomeration of clusters in a solution, resulting in a more stable dispersion. Deciphering the mechanism that governs the formation of Au shell on Fe3O4 core NPs has emphasized the potential of sonication in enhancing the chemical activity in solutions.
Collapse
Affiliation(s)
- Mohammed Ali Dheyab
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.
| | - Azlan Abdul Aziz
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.
| | - Mahmood S Jameel
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
| | - Pegah Moradi Khaniabadi
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
| | - Baharak Mehrdel
- Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Optoelectronics Research and Technology Lab (NORLab), School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
| |
Collapse
|
26
|
Affiliation(s)
- Aung Than
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible DevicesNanyang Technological University Singapore
| | - Ping Zan
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible DevicesNanyang Technological University Singapore
| | - Peng Chen
- School of Chemical and Biomedical Engineering, Innovative Centre for Flexible DevicesNanyang Technological University Singapore
| |
Collapse
|
27
|
Daftardar S, Neupane R, Boddu Sai HS, Renukuntla J, Tiwari AK. Advances in Ultrasound Mediated Transdermal Drug Delivery. Curr Pharm Des 2020; 25:413-423. [PMID: 30747058 DOI: 10.2174/1381612825666190211163948] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 01/04/2019] [Indexed: 11/22/2022]
Abstract
Low frequency ultrasound-assisted drug delivery has been widely investigated as a non-invasive method to enhance the transdermal penetration of drugs. Using this technique, a brief application of ultrasound is used to permeabilize skin for a prolonged time. In this review, an overview on ultrasound is detailed to help explain the parameters that could be modulated to obtain the desired ultrasound parameters for enhanced transdermal drug delivery. The mechanisms of enhancement and the latest developments in the area of ultrasound-assisted transdermal drug delivery are discussed. Special emphasis is placed on the effects of ultrasound when used in combination with microneedles, electroporation and iontophoresis, and penetration enhancers. Further, this review summarizes the effect of ultrasound on skin integrity and the regulatory requirements for commercialization of the ultrasound based transdermal delivery instruments.
Collapse
Affiliation(s)
- Saloni Daftardar
- College of Pharmacy and Pharmaceutical Sciences, The University of Toledo Health Science Campus, Toledo, OH 43614, United States
| | - Rabin Neupane
- College of Pharmacy and Pharmaceutical Sciences, The University of Toledo Health Science Campus, Toledo, OH 43614, United States
| | - H S Boddu Sai
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Jwala Renukuntla
- School of Pharmacy, The University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, United States
| | - Amit K Tiwari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy & Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, United States
| |
Collapse
|
28
|
Gao F, Wu J, Niu S, Sun T, Li F, Bai Y, Jin L, Lin L, Shi Q, Zhu LM, Du L. Biodegradable, pH-Sensitive Hollow Mesoporous Organosilica Nanoparticle (HMON) with Controlled Release of Pirfenidone and Ultrasound-Target-Microbubble-Destruction (UTMD) for Pancreatic Cancer Treatment. Theranostics 2019; 9:6002-6018. [PMID: 31534533 PMCID: PMC6735371 DOI: 10.7150/thno.36135] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 07/20/2019] [Indexed: 12/16/2022] Open
Abstract
The dense extracellular matrix (ECM) and hypovascular networks were often found in solid pancreatic tumors form an impenetrable barrier, leading to limited uptake of chemotherapeutics and thus undesirable treatment outcomes. Methods: A biodegradable nanoplatform based on hollow mesoporous organosilica nanoparticle (HMON) was designed as an effective delivery system for pirfenidone (PFD) to overcome the challenges in pancreatic tumor treatment. By varying pH producing a mildly acidic environment to emulate tumor cells, results in cleavage of the acetal bond between HMON nanoparticle and gating molecular, gemcitabine (Gem), enabling its controlled release. Results: The in vitro and in vivo immunocytochemistry evaluations demonstrated an excellent ECM regulation efficacy of the nanoplatform and therefore the improved penetration of drug into the cells. The technique employed was especially enhanced when mediated with ultrasound target microbubble destruction (UTMD). Evaluations culminated with pancreatic cancer bearing mice and demonstrated therapeutic efficacy, good biodegradability, and negligible systemic toxicity. Conclusion: the designed Gem gated biodegradable nanosystem is expected to provide an alternative way of improving antitumor efficacy by down-regulation of ECM levels and offers a passive-targeted therapy for pancreatic cancer treatment.
Collapse
|
29
|
Park D, Won J, Shin UC, Park H, Song G, Jang J, Park H, Kim CW, Seo J. Transdermal Drug Delivery using a Specialized Cavitation Seed for Ultrasound. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2019; 66:1057-1064. [PMID: 30946663 DOI: 10.1109/tuffc.2019.2907702] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
GOAL The Sonophoresis, which utilizes ultrasound for transdermal drug delivery (TDD), can improve the efficiency of drug delivery for a variety of drugs predominantly due to caviation effect. In order to increase the efficacy of sonophoresis, we propose an alternative cavitation seed specialized for sonophoresis, which can be concentrated on the skin surface by gravity adapting perfluorohexane as core. METHODS An in vitro and in vivo experiments were conducted to assess the effect of the specialized cavitation seed. High performance liquid chromatography was used for in vitro experiments on porcine skin with ferulic acid and an optical imaging system was used for in vivo experiments on rat model with fluorescein isothiocyanate-dextran (FD, 150 kDa), respecitively. RESULTS The amount of ferulic acid delivered by sonophoresis with the proposed cavitation seed was approximately 1,700 times greater than the amount delivered by diffusion. FD could be delivered to a depth of 500 ¼m under the skin, and the average total flux in the region of interest was increased 6.4-fold for the group using sonophoresis with the cavitation seed compared to the group using diffusion. CONCLUSION Conclusively, sonophoresis with the proposed cavitation seed demonstrated significant improvement in TDD and the possibility of macromolecule delivery into the skin. SIGNIFICANCE This approach has potential to be a main TDD method for variety of applications including medicine and cosmetics.
Collapse
|
30
|
Abstract
The transdermal transport of pharmaceuticals possesses various advantageous properties over conventional drug administration techniques such as oral delivery and hypodermic injections. However, the stratum corneum persists as the main barrier, which impedes percutaneous transport. The ultrasound-based transdermal delivery of therapeutics is one of the techniques that are being investigated to overcome this obstacle. This review outlines the background information pertaining to sonophoresis and then discusses the individual sections of sonophoretic research. These areas include the sonophoretic application of various drugs, dual-frequency sonophoresis, synergistic combinations of transdermal drug delivery techniques, and the use of nanosized carriers in ultrasound-based transdermal delivery. The various challenges associated with sonophoretic drug delivery and trends of future research are also highlighted.
Collapse
Affiliation(s)
| | - Boon Mian Teo
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia,
| |
Collapse
|
31
|
Nguyen HX, Banga AK. Electrically and Ultrasonically Enhanced Transdermal Delivery of Methotrexate. Pharmaceutics 2018; 10:pharmaceutics10030117. [PMID: 30081603 PMCID: PMC6161078 DOI: 10.3390/pharmaceutics10030117] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 07/23/2018] [Accepted: 08/01/2018] [Indexed: 12/29/2022] Open
Abstract
In this study, we used sonophoresis and iontophoresis to enhance the in vitro delivery of methotrexate through human cadaver skin. Iontophoresis was applied for 60 min at a 0.4 mA/sq·cm current density, while low-frequency sonophoresis was applied at a 20 kHz frequency (2 min application, and 6.9 W/sq·cm intensity). The treated skin was characterized by dye binding, transepidermal water loss, skin electrical resistance, and skin temperature measurement. Both sonophoresis and iontophoresis resulted in a significant reduction in skin electrical resistance as well as a marked increase in transepidermal water loss value (p < 0.05). Furthermore, the ultrasonic waves resulted in a significant increase in skin temperature (p < 0.05). In permeation studies, the use of iontophoresis led to a significantly higher drug permeability than the untreated group (n = 4, p < 0.05). The skin became markedly more permeable to methotrexate after the treatment by sonophoresis than by iontophoresis (p < 0.01). A synergistic effect for the combined application of sonophoresis and iontophoresis was also observed. Drug distribution in the skin layers revealed a significantly higher level of methotrexate in the sonicated skin than that in iontophoresis and untreated groups. Iontophoresis and low-frequency sonophoresis were found to enhance the transdermal and intradermal delivery of methotrexate in vitro.
Collapse
Affiliation(s)
- Hiep X Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
| | - Ajay K Banga
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
| |
Collapse
|
32
|
Lifshiz Zimon R, Lerman G, Elharrar E, Meningher T, Barzilai A, Masalha M, Chintakunta R, Hollander E, Goldbart R, Traitel T, Harats M, Sidi Y, Avni D, Kost J. Ultrasound targeting of Q-starch/miR-197 complexes for topical treatment of psoriasis. J Control Release 2018; 284:103-111. [DOI: 10.1016/j.jconrel.2018.05.040] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 11/24/2022]
|
33
|
Amplified CPEs enhancement of chorioamnion membrane mass transport by encapsulation in nano-sized PLGA particles. Eur J Pharm Biopharm 2017; 117:292-299. [DOI: 10.1016/j.ejpb.2017.04.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/26/2017] [Accepted: 04/28/2017] [Indexed: 01/20/2023]
|
34
|
Pereira TA, Ramos DN, Lopez RFV. Hydrogel increases localized transport regions and skin permeability during low frequency ultrasound treatment. Sci Rep 2017; 7:44236. [PMID: 28287146 PMCID: PMC5347001 DOI: 10.1038/srep44236] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 02/06/2017] [Indexed: 11/09/2022] Open
Abstract
Low frequency ultrasound (LFU) enhances skin permeability via the formation of heterogeneous localized transport regions (LTRs). In this work, hydrogels with different zeta potentials were used as the coupling medium for LFU to investigate their contribution to LTR patterns and to the skin penetration of two model drugs, calcein and doxorubicin (DOX). When hydrogels were used, LTRs covering at least a 3-fold greater skin area were observed compared to those resulting from traditional LFU treatment and sodium lauryl sulfate. More LTRs resulted in an enhancement of calcein skin permeation. The zeta potential of the hydrogels affected the skin penetration of the positively charged DOX; the cationic coupling medium decreased the DOX recovered from the viable epidermis by 2.8-fold, whereas the anionic coupling medium increased the DOX accumulation in the stratum corneum by 4.4-fold. Therefore, LFU/hydrogel treatment increases LTRs areas and can target ionized drugs to specific skin layers depending on the zeta potential of the coupling medium.
Collapse
Affiliation(s)
- Tatiana Aparecida Pereira
- University of Sao Paulo, School of Pharmaceutical Sciences of Ribeirao Preto, Ribeirao Preto, SP, Brazil
| | - Danielle Nishida Ramos
- University of Sao Paulo, School of Pharmaceutical Sciences of Ribeirao Preto, Ribeirao Preto, SP, Brazil
| | - Renata F V Lopez
- University of Sao Paulo, School of Pharmaceutical Sciences of Ribeirao Preto, Ribeirao Preto, SP, Brazil
| |
Collapse
|
35
|
Liao AH, Lu YJ, Hung CR, Yang MY. Efficacy of transdermal magnesium ascorbyl phosphate delivery after ultrasound treatment with microbubbles in gel-type surrounding medium in mice. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 61:591-8. [PMID: 26838887 DOI: 10.1016/j.msec.2015.12.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 07/07/2015] [Accepted: 12/28/2015] [Indexed: 12/11/2022]
Abstract
Liquid microemulsions appropriate for topical application were obtained by increasing their viscosity through the addition of thickening agents. The present study first assessed the usefulness of ultrasound (US) plus US contrast agent, microbubbles (MBs), in agarose gel for enhancing transdermal drug delivery. The effect of US plus MBs in agarose gel on the penetration of the skin by magnesium ascorbyl phosphate (MAP) was explored both in vitro and in vivo. In the in vitro experiments, the stability of MBs was investigated by examining the penetration of MAP by the model drug, Evans blue, in two media: an agarose phantom and pig skin. The penetration depth in the agarose phantom and pig skin increased by 40% and 195%, respectively, when treated with US plus MBs in 0.1% agarose solution combined with MAP (UMB1), and by 48% and 206%, respectively, when treated with US plus MBs in 0.15% agarose solution and MAP (UMB2). The skin-whitening effects in C57BL/6J mice in the UMB1 and UMB2 groups over a 4-week experimental period were significantly increased by 63% and 70%, respectively, in the fourth week. The findings of this study suggest that the survival of MBs with US is affected by the viscosity of the surrounding medium, and that in mice, treatment with US plus MBs in a suitable agarose gel can increase skin permeability and enhance transdermal MAP delivery.
Collapse
Affiliation(s)
- Ai-Ho Liao
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Department of Medical Engineering, National Defense Medical Center, Taipei 11490, Taiwan.
| | - Ying-Jui Lu
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chi-Ray Hung
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Meng-Yu Yang
- Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| |
Collapse
|
36
|
Affiliation(s)
- Kevin Ita
- College of Pharmacy, Touro University, Vallejo, CA, USA
| |
Collapse
|
37
|
Sodipo BK, Abdul Aziz A. Non-seeded synthesis and characterization of superparamagnetic iron oxide nanoparticles incorporated into silica nanoparticles via ultrasound. ULTRASONICS SONOCHEMISTRY 2015; 23:354-359. [PMID: 25315418 DOI: 10.1016/j.ultsonch.2014.09.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 09/24/2014] [Accepted: 09/25/2014] [Indexed: 06/04/2023]
Abstract
A non-seeded method of incorporating superparamagnetic iron oxide nanoparticles (SPION) into silica nanoparticles is presented. Mixture of both SPION and silica nanoparticles was ultrasonically irradiated. The collapsed bubbles and shockwave generated from the ultrasonic irradiation produce tremendous force that caused inelastic collision and incorporation of SPION into the silica. Physicochemical analyses using transmission electron microscope (TEM), electronic spectroscopic imaging (ESI), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy demonstrated the formation of SPION/silica composite nanoparticles. The prepared composite nanoparticles exhibited superparamagnetic behaviour and nearly 70% of the initial saturation magnetization (Ms) of the SPION was retained. The presence and reactivity of the silica were demonstrated via assembling decanethiol monolayer on the composite nanoparticles. The silanol group of the silica provided the binding site for the alkyl group in the decanethiol molecules. Therefore, the thiol moiety became the terminal and functional group on the magnetic composite nanoparticles.
Collapse
Affiliation(s)
- Bashiru Kayode Sodipo
- Nano-Optoelectronics Research and Technology (NOR) Lab, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.
| | - Azlan Abdul Aziz
- Nano-Optoelectronics Research and Technology (NOR) Lab, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia; Nano-Biotechnology Research and Innovation (NanoBRI), Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
| |
Collapse
|
38
|
Azagury A, Khoury L, Adato Y, Wolloch L, Ariel I, Hallak M, Kost J. The synergistic effect of ultrasound and chemical penetration enhancers on chorioamnion mass transport. J Control Release 2015; 200:35-41. [DOI: 10.1016/j.jconrel.2014.12.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 12/12/2014] [Accepted: 12/13/2014] [Indexed: 10/24/2022]
|
39
|
Han T, Das DB. Potential of combined ultrasound and microneedles for enhanced transdermal drug permeation: a review. Eur J Pharm Biopharm 2014; 89:312-28. [PMID: 25541440 DOI: 10.1016/j.ejpb.2014.12.020] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 12/11/2014] [Accepted: 12/15/2014] [Indexed: 11/28/2022]
Abstract
Transdermal drug delivery (TDD) is limited by the outer layer of the skin, i.e., the stratum corneum. Research on TDD has become very active in the recent years and various technologies have been developed to overcome the resistance of the stratum corneum to molecular diffusion. In particular, researchers have started to consider the possibility of combining the TDD technologies in order to have further increase in drug permeability. Both microneedles (MNs) and ultrasound are promising technologies. They achieve enhancement in drug permeation via different mechanisms and therefore give a good potential for combining with each other. This review will focus on discussing the potential of this combinational technique along with other important issues, e.g., the mechanisms of ultrasound and MNs as it is and these mechanisms which are coupled via the two systems (i.e. MNs and ultrasound). We discuss the possible ways to achieve this combination as well as how this combination would increase the permeability. Some of the undeveloped (weaker) research areas of MNs and sonophoresis are also discussed in order to understand the true potential of combining the two technologies when they are developed further in the future. We propose several hypothetical combinations based on the possible mechanisms involved in MNs and ultrasound. Furthermore, we carry out a cluster analysis by which we determine the significance of this combinational method in comparison with some other selected combinational methods for TDD (e.g., MNs and iontophoresis). Using a time series analysis tool (ARIMA model), the current trend and the future development of combined MNs and ultrasound are also analysed. Overall, the review in this paper indicates that combining MNs and ultrasound is a promising TDD method for the future.
Collapse
Affiliation(s)
- Tao Han
- Chemical Engineering Department, Loughborough University, Loughborough, UK
| | - Diganta Bhusan Das
- Chemical Engineering Department, Loughborough University, Loughborough, UK.
| |
Collapse
|
40
|
Wong TW. Electrical, magnetic, photomechanical and cavitational waves to overcome skin barrier for transdermal drug delivery. J Control Release 2014; 193:257-69. [DOI: 10.1016/j.jconrel.2014.04.045] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/21/2014] [Accepted: 04/23/2014] [Indexed: 01/17/2023]
|
41
|
Rich KT, Hoerig CL, Rao MB, Mast TD. Relations between acoustic cavitation and skin resistance during intermediate- and high-frequency sonophoresis. J Control Release 2014; 194:266-77. [PMID: 25135791 DOI: 10.1016/j.jconrel.2014.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 07/24/2014] [Accepted: 08/06/2014] [Indexed: 10/24/2022]
Abstract
Enhanced skin permeability is known to be achieved during sonophoresis due to ultrasound-induced cavitation. However, the mechanistic role of cavitation during sonophoresis has been extensively investigated only for low-frequency (LFS, <100 kHz) applications. Here, mechanisms of permeability-enhancing stable and inertial cavitation were investigated by passively monitoring subharmonic and broadband emissions arising from cavitation isolated within or external to porcine skin in vitro during intermediate- (IFS, 100-700 kHz) and high-frequency sonophoresis (HFS, >1 MHz). The electrical resistance of skin, a surrogate measure of the permeability of skin to a variety of compounds, was measured to quantify the reduction and subsequent recovery of the skin barrier during and after exposure to pulsed (1 second pulse, 20% duty cycle) 0.41 and 2.0 MHz ultrasound over a range of acoustic powers (0-21.7 W) for 30 min. During IFS, significant skin resistance reductions and acoustic emissions from cavitation were measured exclusively when cavitation was isolated outside of the skin. Time-dependent skin resistance reductions measured during IFS correlated significantly with subharmonic and broadband emission levels. During HFS, significant skin resistance reductions were accompanied by significant acoustic emissions from cavitation measured during trials that isolated cavitation activity either outside of skin or within skin. Time-dependent skin resistance reductions measured during HFS correlated significantly greater with subharmonic than with broadband emission levels. The reduction of the skin barrier due to sonophoresis was reversible in all trials; however, effects incurred during IFS recovered more slowly and persisted over a longer period of time than HFS. These results quantitatively demonstrate the significance of cavitation during sonophoresis and suggest that the mechanisms and post-treatment longevity of permeability enhancement due to IFS and HFS treatments are different.
Collapse
Affiliation(s)
- Kyle T Rich
- Biomedical Engineering Program, University of Cincinnati, Cincinnati, OH, USA
| | - Cameron L Hoerig
- Electrical Engineering Program, University of Cincinnati, Cincinnati, OH, USA
| | - Marepalli B Rao
- Biomedical Engineering Program, University of Cincinnati, Cincinnati, OH, USA; Department of Environmental Health, University of Cincinnati, Cincinnati, OH, USA
| | - T Douglas Mast
- Biomedical Engineering Program, University of Cincinnati, Cincinnati, OH, USA.
| |
Collapse
|
42
|
Fetal membrane transport enhancement using ultrasound for drug delivery and noninvasive detection. Pharm Res 2014; 32:403-13. [PMID: 25079390 DOI: 10.1007/s11095-014-1470-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Accepted: 07/24/2014] [Indexed: 10/25/2022]
Abstract
PURPOSE The purpose of this research was to evaluate the effect of ultrasound on mass transport across fetal membrane for direct fetal drug delivery and sensing of the amniotic fluid in a noninvasive manner. METHODS Post-delivery human fetal membranes (chorioamnion) were used for in vitro experiments, in which the effect of ultrasound on transport across fetal membrane of fluorescent model molecule (250 kDa) was evaluated. Ex vivo experiments were carried out on a whole rat amniotic sac. The model molecule or alpha-fetoprotein was injected into the amniotic sac through the placenta. Transport of these molecules across pre- and post-insonation of the amniotic sac was evaluated. The ultrasound enhancement's mechanism was also assessed. RESULTS The greatest enhancement in mass transport (43-fold) in vitro was achieved for 5 min of insonation (20 kHz, 4.6 W/cm(2), 5 mm distance). Ex vivo results showed a rapid increase (23-fold) in mass transport of the model molecule and also for alphafetoprotein following 30 s of insonation (20 kHz, 4.6 W/cm(2), 5 mm distance). CONCLUSIONS Mass transport across fetal membranes was enhanced post-insonation both in vitro and ex vivo in a reversible and transient manner. We suggest that exterior (to the amniotic sac) ultrasound-induced cavitation is the main mechanism of action.
Collapse
|
43
|
Nayak A, Babla H, Han T, Das DB. Lidocaine carboxymethylcellulose with gelatine co-polymer hydrogel delivery by combined microneedle and ultrasound. Drug Deliv 2014; 23:658-69. [DOI: 10.3109/10717544.2014.935985] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
44
|
Azagury A, Khoury L, Enden G, Kost J. Ultrasound mediated transdermal drug delivery. Adv Drug Deliv Rev 2014; 72:127-43. [PMID: 24463344 DOI: 10.1016/j.addr.2014.01.007] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 12/24/2013] [Accepted: 01/14/2014] [Indexed: 01/06/2023]
Abstract
Transdermal drug delivery offers an attractive alternative to the conventional drug delivery methods of oral administration and injections. However, the stratum corneum serves as a barrier that limits the penetration of substances to the skin. Application of ultrasound (US) irradiation to the skin increases its permeability (sonophoresis) and enables the delivery of various substances into and through the skin. This review presents the main findings in the field of sonophoresis in transdermal drug delivery as well as transdermal monitoring and the mathematical models associated with this field. Particular attention is paid to the proposed enhancement mechanisms and future trends in the fields of cutaneous vaccination and gene therapy.
Collapse
Affiliation(s)
- Aharon Azagury
- Department of Chemical Engineering, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Luai Khoury
- Department of Biomedical Engineering, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Giora Enden
- Department of Biomedical Engineering, Ben-Gurion University, Beer-Sheva 84105, Israel
| | - Joseph Kost
- Department of Chemical Engineering, Ben-Gurion University, Beer-Sheva 84105, Israel.
| |
Collapse
|
45
|
Kojima Y, Imazu H, Nishida K. Physical and chemical characteristics of ultrasonically-prepared water-in-diesel fuel: effects of ultrasonic horn position and water content. ULTRASONICS SONOCHEMISTRY 2014; 21:722-728. [PMID: 24207138 DOI: 10.1016/j.ultsonch.2013.09.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 09/26/2013] [Accepted: 09/27/2013] [Indexed: 06/02/2023]
Abstract
An ultrasonic technique was applied to preparation of two-phase water-in-oil (W/O) emulsified fuel of water/diesel oil/surfactant. In this study, an ultrasonic apparatus with a 28 kHz rod horn was used. The influence of the horn tip position during ultrasonic treatment, sonication time and water content (5 or 10 vol%) on the emulsion stability, viscosity, water droplet size and water surface area of emulsion fuels prepared by ultrasonication was investigated. The emulsion stability of ultrasonically-prepared fuel significantly depended on the horn tip position during ultrasonic irradiation. It was found that the change in the stability with the horn tip position was partly related to that in the ultrasonic power estimated by calorimetry. Emulsion stability, viscosity and sum of water droplets surface area increased and water droplet size decreased with an increase in sonication time, and they approached each limiting value in the longer time. The maximum values of the viscosity and water surface area increased with water content, while the limiting values of the emulsion stability and water droplet size were almost independent of water content. During ultrasonication of water/diesel oil mixture, the hydrogen and methane were identified and the cracking of hydrocarbon components in the diesel oil occurred. The combustion characteristics of ultrasonically-prepared emulsion fuel were studied and compared with those of diesel oil. The soot and NOx emissions during combustion of the emulsified fuel with higher water contents were significantly reduced compared with those during combustion of diesel oil.
Collapse
Affiliation(s)
- Yoshihiro Kojima
- EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
| | | | | |
Collapse
|
46
|
Park D, Park H, Seo J, Lee S. Sonophoresis in transdermal drug deliverys. ULTRASONICS 2014; 54:56-65. [PMID: 23899825 DOI: 10.1016/j.ultras.2013.07.007] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 06/01/2013] [Accepted: 07/02/2013] [Indexed: 05/15/2023]
Abstract
Transdermal drug delivery (TDD) has several significant advantages compared to oral drug delivery, including elimination of pain and sustained drug release. However, the use of TDD is limited by low skin permeability due to the stratum corneum (SC), the outermost layer of the skin. Sonophoresis is a technique that temporarily increases skin permeability such that various medications can be delivered noninvasively. For the past several decades, various studies of sonophoresis in TDD have been performed focusing on parameter optimization, delivery mechanism, transport pathway, or delivery of several drug categories including hydrophilic and high molecular weight compounds. Based on these various studies, several possible mechanisms of sonophoresis have been suggested. For example, cavitation is believed to be the predominant mechanism responsible for drug delivery in sonophoresis. This review presents details of various studies on sonophoresis including the latest trends, delivery of various therapeutic drugs, sonophoresis pathways and mechanisms, and outlook of future studies.
Collapse
Affiliation(s)
- Donghee Park
- Department of Biomedical Engineering, Yonsei University, Wonju 220-710, Republic of Korea
| | | | | | | |
Collapse
|
47
|
Petchsangsai M, Rojanarata T, Opanasopit P, Ngawhirunpat T. The Combination of Microneedles with Electroporation and Sonophoresis to Enhance Hydrophilic Macromolecule Skin Penetration. Biol Pharm Bull 2014; 37:1373-82. [DOI: 10.1248/bpb.b14-00321] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Maleenart Petchsangsai
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University
| | - Theerasak Rojanarata
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University
| | - Praneet Opanasopit
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University
| | - Tanasait Ngawhirunpat
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University
| |
Collapse
|
48
|
Zhao YZ, Du LN, Lu CT, Jin YG, Ge SP. Potential and problems in ultrasound-responsive drug delivery systems. Int J Nanomedicine 2013; 8:1621-33. [PMID: 23637531 PMCID: PMC3635663 DOI: 10.2147/ijn.s43589] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Ultrasound is an important local stimulus for triggering drug release at the target tissue. Ultrasound-responsive drug delivery systems (URDDS) have become an important research focus in targeted therapy. URDDS include many different formulations, such as microbubbles, nanobubbles, nanodroplets, liposomes, emulsions, and micelles. Drugs that can be loaded into URDDS include small molecules, biomacromolecules, and inorganic substances. Fields of clinical application include anticancer therapy, treatment of ischemic myocardium, induction of an immune response, cartilage tissue engineering, transdermal drug delivery, treatment of Huntington’s disease, thrombolysis, and disruption of the blood–brain barrier. This review focuses on recent advances in URDDS, and discusses their formulations, clinical application, and problems, as well as a perspective on their potential use in the future.
Collapse
Affiliation(s)
- Ying-Zheng Zhao
- Wenzhou Medical College, Wenzhou City, Zhejiang Province, People's Republic of China
| | | | | | | | | |
Collapse
|
49
|
Tabaraki R, Heidarizadi E, Benvidi A. Optimization of ultrasonic-assisted extraction of pomegranate (Punica granatum L.) peel antioxidants by response surface methodology. Sep Purif Technol 2012. [DOI: 10.1016/j.seppur.2012.06.038] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
50
|
Ahmadi F, McLoughlin IV, Chauhan S, ter-Haar G. Bio-effects and safety of low-intensity, low-frequency ultrasonic exposure. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2012; 108:119-38. [PMID: 22402278 DOI: 10.1016/j.pbiomolbio.2012.01.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Accepted: 01/30/2012] [Indexed: 11/25/2022]
Abstract
Low-frequency (LF) ultrasound (20-100 kHz) has a diverse set of industrial and medical applications. In fact, high power industrial applications of ultrasound mainly occupy this frequency range. This range is also used for various therapeutic medical applications including sonophoresis (ultrasonic transdermal drug delivery), dentistry, eye surgery, body contouring, the breaking of kidney stones and eliminating blood clots. While emerging LF applications such as ultrasonic drug delivery continue to be developed and undergo translation for human use, significant gaps exist in the coverage of safety standards for this frequency range. Accordingly, the need to understand the biological effects of LF ultrasound is becoming more important. This paper presents a broad overview of bio-effects and safety of LF ultrasound as an aid to minimize and control the risk of these effects. Its particular focus is at low intensities where bio-effects are initially observed. To generate a clear perspective of hazards in LF exposure, the mechanisms of bio-effects and the main differences in action at low and high frequencies are investigated and a survey of harmful effects of LF ultrasound at low intensities is presented. Mechanical and thermal indices are widely used in high frequency diagnostic applications as a means of indicating safety of ultrasonic exposure. The direct application of these indices at low frequencies needs careful investigation. In this work, using numerical simulations based on the mathematical and physical rationale behind the indices at high frequencies, it is observed that while thermal index (TI) can be used directly in the LF range, mechanical index (MI) seems to become less reliable at lower frequencies. Accordingly, an improved formulation for the MI is proposed for frequencies below 500 kHz.
Collapse
Affiliation(s)
- Farzaneh Ahmadi
- School of Computer Engineering, Nanyang Technological University, N4-02b-52, Nanyang Avenue, Singapore 639798, Singapore
| | | | | | | |
Collapse
|