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Low-intensity ultrasound inhibits melanoma cell proliferation in vitro and tumor growth in vivo. J Med Ultrason (2001) 2021; 48:451-461. [PMID: 34453238 DOI: 10.1007/s10396-021-01131-0] [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: 03/12/2021] [Accepted: 07/19/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE To determine the effect of low-intensity ultrasound on cancer cell proliferation in vitro and tumor growth in vivo. METHODS In vitro, several cancer cell lines were exposed to low-intensity ultrasound at 0.11 W/cm2 for 2 min. Of the cell lines screened, melanoma C32 is one of the cell lines that showed sensitivity to growth inhibition by ultrasound and was therefore used in succeeding experiments. In vivo, under the same ultrasound conditions used in vitro, C32 tumors in mice were exposed to ultrasound daily for 2 weeks, and the tumor volumes were monitored weekly using sonography. RESULTS In vitro, C32 cell growth was inhibited, attaining 43.2% inhibition on the 3rd day. In vivo, tumor growth was significantly inhibited, with the treated tumors exhibiting 2.7-fold slowed tumor growth vs. untreated tumors at week 2. Such inhibition was not associated with increased cell death. Several genes related to the cell cycle and proliferation were among those significantly regulated. CONCLUSION These findings highlight the potential of low-intensity ultrasound to inhibit tumor growth in a noninvasive, safe, and easy-to-administer way. In addition, this may suggest that the mechanical stress induced by ultrasound on C32 cells may have affected the intrinsic biomolecular mechanism related to the cell growth of this particular cell line. Further research is needed to identify which of the regulated genes played key roles in growth inhibition.
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Katiyar A, Osborn J, DasBanerjee M, Zhang LG, Sarkar K, Sarker KP. Inhibition of Human Breast Cancer Cell Proliferation by Low-Intensity Ultrasound Stimulation. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2020; 39:2043-2052. [PMID: 32352188 DOI: 10.1002/jum.15312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 03/17/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVES Cancer is characterized by uncontrolled cell proliferation, which makes novel therapies highly desired. In this study, the effects of near-field low-intensity pulsed ultrasound (LIPUS) stimulation on T47D human breast cancer cell and healthy immortalized MCF-12A breast epithelial cell proliferation were investigated in monolayer cultures. METHODS A customized ultrasound (US) exposure setup was used for the variation of key US parameters: intensity, excitation duration, and duty cycle. Cell proliferation was quantified by 5-bromo-2'-deoxyuridine and alamarBlue assays after LIPUS excitation. RESULTS At a 20% duty cycle and 10-minute excitation period, we varied LIPUS intensity from to 100 mW/cm2 (spatial-average temporal-average) to find a gradual decrease in T47D cell proliferation, the decrease being strongest at 100 mW/cm2 . In contrast, healthy MCF-12A breast cells showed an increase in proliferation when exposed to the same conditions. Above a 60% duty cycle, T47D cell proliferation decreased drastically. Effects of continuous wave US stimulation were further explored by varying the intensity and excitation period. CONCLUSIONS These experiments concluded that, irrespective of the waveform (pulsed or continuous), LIPUS stimulation could inhibit the proliferation of T47D breast cancer cells, whereas the same behavior was not observed in healthy cells. The study demonstrates the beneficial bioeffects of LIPUS on breast cancer cells and offers the possibility of developing novel US-mediated cancer therapy.
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Affiliation(s)
- Amit Katiyar
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware, USA
| | - Jenna Osborn
- Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC, USA
| | - Malaya DasBanerjee
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware, USA
| | - Lijie Grace Zhang
- Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC, USA
| | - Kausik Sarkar
- Department of Mechanical and Aerospace Engineering, George Washington University, Washington, DC, USA
| | - Krishna Pada Sarker
- Department of Mechanical Engineering, University of Delaware, Newark, Delaware, USA
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Chen J, Li J, Zhang X, Wu Z, Tyagi RD. Ultra-sonication for controlling the formation of disinfection by-products in the ClO 2 pre-oxidation of water containing high concentrations of algae. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:849-861. [PMID: 31093815 DOI: 10.1007/s10653-019-00312-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
Eutrophication has become great concern in recent years due to the fact that rivers, lakes, and reservoirs are the main drinking water source. Studies have been performed to enhance the removal of algae with ClO2 pre-oxidation, but there was high potential in the formation of chlorite and chlorate. In this study, ultra-sonication was employed to assist algae removal and control disinfection by-products formation in ClO2 pre-oxidation processes. It was found that solo ultra-sonication for 10 min (algae removal 86.11 ± 2.16%) could achieve similar algae removal efficiency as that with solo ClO2 (0.5 mg/L) pre-oxidation for 10 min (algae removal 87.10 ± 3.50%). In addition, no formations of chlorite and chlorate were detected in solo ultra-sonication process. Five-minutes ultra-sonication followed by 5-min 0.5 mg/L ClO2 treatment (total treatment time 10 min; algae removal 93.55 ± 3.22%) provided a better performance on algae removal compared to the solo ClO2 (0.5 mg/L) pre-oxidation for 10 min. Moreover, chlorite was undetectable. It suggests that the utilization of ultra-sonication in ClO2 pretreatment for algae removal has highly prevented the formations of chlorite and chlorate.
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Affiliation(s)
- Jiaxin Chen
- Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, People's Republic of China
| | - Ji Li
- Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, People's Republic of China
| | - Xiaolei Zhang
- Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, People's Republic of China.
| | - Zhaoyang Wu
- Department of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, People's Republic of China
| | - R D Tyagi
- INRS Eau, Terre et Environnement, 490, rue de la Couronne, Québec, G1K 9A9, Canada
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Investigation of the cell disruption methods for maximizing the extraction of arginase from mutant Bacillus licheniformis (M09) using statistical approach. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0107-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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5
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Chen J, Li J, Zhang X, Tyagi RD, Dong W. Ultra-sonication application in biodiesel production from heterotrophic oleaginous microorganisms. Crit Rev Biotechnol 2018; 38:902-917. [DOI: 10.1080/07388551.2017.1418733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Jiaxin Chen
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, P.R. China
- Eau, Terre et Environnement, INRS, Québec, Canada
| | - Ji Li
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, P.R. China
| | - Xiaolei Zhang
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, P.R. China
| | | | - Wenyi Dong
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, P.R. China
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Kaur H, Siraki AG, Uludağ H, Dederich DN, Flood P, El-Bialy T. Role of Reactive Oxygen Species during Low-Intensity Pulsed Ultrasound Application in MC-3 T3 E1 Pre-osteoblast Cell Culture. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:2699-2712. [PMID: 28807447 DOI: 10.1016/j.ultrasmedbio.2017.07.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 06/02/2017] [Accepted: 07/07/2017] [Indexed: 06/07/2023]
Abstract
We evaluated the activation of mitogen-activated protein kinase (MAPK) activation through reactive oxygen species (ROS) by application of low-intensity ultrasound (LIPUS) to MC-3 T3 E1 pre-osteoblasts. The cells were subjected to one LIPUS application for either 10 or 20 min, and the control group was exposed to a sham transducer. For ROS inhibition, 10 μM diphenylene iodonium (DPI) was added to the cells an hour before LIPUS application. Samples were collected 1, 3, 6, 12 and 24 h after LIPUS application, and cells were evaluated for ROS generation, cell viability, gene expression and MAPK activation by immunoblot analyses. LIPUS caused a significant increase in ROS and cell viability in the non-DPI-treated group. Expression of RUNX2, OCN and OPN mRNA was higher in the LIPUS-treated groups at 1 h in both the DPI-treated and non-DPI-treated groups; RUNX2 and OCN mRNA levels increased at 6 h. ERK1/2 activation was increased in the LIPUS-treated groups. These results indicate that LIPUS activates MAPK by ROS generation in MC-3 T3 E1 pre-osteoblasts.
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Affiliation(s)
- Harmanpreet Kaur
- Department of Dentistry, University of Alberta, Edmonton, Alberta Canada.
| | - Arno G Siraki
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Hasan Uludağ
- Department of Biomedical Engineering, Department of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Douglas N Dederich
- Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Patrick Flood
- Department of Dentistry, Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Tarek El-Bialy
- Department of Dentistry, Department of Biomedical Engineering, University of Alberta, Edmonton, Alberta, Canada
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Ren ST, Shen S, He XY, Liao YR, Sun PF, Wang B, Zhao WB, Han SP, Wang YL, Tian T. The Effect of Docetaxel-Loaded Micro-Bubbles Combined with Low-Frequency Ultrasound in H22 Hepatocellular Carcinoma-Bearing Mice. ULTRASOUND IN MEDICINE & BIOLOGY 2016; 42:549-560. [PMID: 26651601 DOI: 10.1016/j.ultrasmedbio.2015.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 09/18/2015] [Accepted: 10/14/2015] [Indexed: 06/05/2023]
Abstract
A novel lipid micro-bubble (MB) loaded with docetaxel (DOC-MB) was investigated in a previous study. However, its anti-tumor effects and mechanism of action in combination with low-frequency ultrasound (LFUS) in vivo are still unclear. DOC-MBs containing 5.0 mg of DOC were prepared by lyophilization with modification via ultrasonic emulsification. Then, the effects of DOC-MBs combined with LFUS on tumor growth, proliferating cell nuclear antigen (PCNA) expression and cell apoptosis, as well as local DOC delivery, were investigated in H22 hepatocellular carcinoma (HCC)-bearing mice. Compared with the previously prepared DOC-MBs (1.6 mg of DOC loaded), the encapsulation efficiency (81.2% ± 3.89%) and concentration ([7.94 ± 0.04] × 10(9) bubbles/mL) of the DOC-MBs containing 5.0 mg of DOC were higher, but the bubble size (1.368 ± 0.004 μm) was smaller. After treatment with the DOC-MBs and LFUS, the H22 HCC growth inhibition rate was significantly increased, PCNA expression in tumor tissue was significantly inhibited and local release of DOC was induced. In conclusion, new DOC-MBs containing 5.0 mg of DOC were successfully prepared with a high encapsulation efficiency and superior bubble size and concentration, and their combination with LFUS significantly enhanced the anti-tumor effect of DOC in H22 HCC-bearing mice by inhibiting tumor cell proliferation and increasing local drug delivery.
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Affiliation(s)
- Shu-Ting Ren
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China.
| | - Shu Shen
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China; Second Division of In Vitro Diagnostic Reagents, National Institute of Food and Drug Control, Beijing, China
| | - Xin-Ying He
- Department of Pathology, Xi'an Medical University, Xi'an, China
| | - Yi-Ran Liao
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Peng-Fei Sun
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Bing Wang
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China; Therapeutic Vaccines Engineering Center of Shaanxi Province, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Wen-Bao Zhao
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Shui-Ping Han
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Yi-Li Wang
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China; Institute of Cancer Research, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Tian Tian
- Department of Pathology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
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Shi M, Liu B, Liu G, Wang P, Yang M, Li Y, Zhou J. Low intensity-pulsed ultrasound induced apoptosis of human hepatocellular carcinoma cells in vitro. ULTRASONICS 2016; 64:43-53. [PMID: 26231998 DOI: 10.1016/j.ultras.2015.07.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 07/18/2015] [Accepted: 07/21/2015] [Indexed: 05/15/2023]
Abstract
The present study was conducted to determine whether low intensity-pulsed ultrasound (LIPUS) could induce apoptosis of human hepatocellular carcinoma cells, SMMC-7721, and to define the mechanism of ultrasound-induced apoptosis, in vitro. MTT assay was used to measure cell proliferation. Apoptosis was investigated by multiple methods such as flow cytometry, DNA fragmentation, Ca(2+) mobilizations, pro- and anti-apoptotic protein expression, and light as well as ultramicroscopic morphology. The results provide evidence that LIPUS induced a dose-dependent effect on cell viability and apoptosis of SMMC-7721 cells. Specifically, exposure of cells to >0.5 W/cm(2) intensity significantly increased cell apoptosis, caused shifts in cell cycle phase, and induced structural changes. Ultrasound significantly increased intracellular Ca(2+) concentrations and modulated expression of caspase-3, Bcl-2 and Bax. The findings suggest that this novel technology can be used to induce SMMC-7721 apoptosis via the Ca(2+)/mitochondrial pathway and could potentially be of clinical use for the treatment of hepatocellular carcinoma (SMMC-7721 cell line) and other cancers.
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Affiliation(s)
- Mingfang Shi
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Bangzhong Liu
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
| | - Guanghua Liu
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Ping Wang
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Mingzhen Yang
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yun Li
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jian Zhou
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Su X, Wang P, Wang X, Guo L, Li S, Liu Q. Involvement of MAPK activation and ROS generation in human leukemia U937 cells undergoing apoptosis in response to sonodynamic therapy. Int J Radiat Biol 2013; 89:915-27. [DOI: 10.3109/09553002.2013.817700] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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10
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Ren ST, Liao YR, Kang XN, Li YP, Zhang H, Ai H, Sun Q, Jing J, Zhao XH, Tan LF, Shen XL, Wang B. The antitumor effect of a new docetaxel-loaded microbubble combined with low-frequency ultrasound in vitro: preparation and parameter analysis. Pharm Res 2013; 30:1574-85. [PMID: 23417512 DOI: 10.1007/s11095-013-0996-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 01/28/2013] [Indexed: 01/10/2023]
Abstract
PURPOSE To develop a novel docetaxel (DOC)-loaded lipid microbubbles (MBs) for achieving target therapy and overcoming the poor water-solubility drawback of DOC. METHODS A novel DOC-loaded microbubble (DOC + MB) was prepared by lyophilization and the physicochemical properties including ultrasound contrast imaging of the liver were measured. The anti-tumor effect of the DOC + MBs combined with low-frequency ultrasound (LFUS; 0.8 Hz, 2.56 W/cm², 50% cycle duty) on the DLD-1 cancer cell line was examined using an MTT assay. RESULTS The physicochemical properties of the two tested formats of DOC + MBs (1.0 mg and 1.6 mg) was shown: concentration, (6.74 ± 0.02) × 10⁸ bubbles/mL and (8.27 ± 0.15) × 10⁸ bubbles/mL; mean size, 3.296 ± 0.004 μm and 3.387 ± 0.005 μm; pH value, 6.67 ± 0.11 and 6.56 ± 0.05; release rate, 3.41% and 12.50%; Zeta potential, -37.95 ± 7.84 mV and -44.35 ± 8.70 mV; and encapsulation efficiency, 54.9 ± 6.21% and 46.3 ± 5.69%, respectively. Compared with SonoVue, the DOC + MBs similarly enhanced the echo signal of the liver imaging. The anti-tumor effect of the DOC + MBs/LFUS group was significantly better than that of DOC alone and that of the normal MBs/LFUS groups. CONCLUSIONS The self-made DOC + MBs have potential as a new ultrasound contrast agent and drug-loaded microbubble, and can obviously enhance the antitumor effect of DOC under LFUS exposure.
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Affiliation(s)
- Shu-Ting Ren
- Department of Pathology and Therapeutic Vaccines Engineering Center of Shaanxi Province, School of Medicine, Xi'an Jiaotong University, Xi'an, 710061, China
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Hassan MA, Ahmed IS, Campbell P, Kondo T. Enhanced gene transfection using calcium phosphate co-precipitates and low-intensity pulsed ultrasound. Eur J Pharm Sci 2012; 47:768-73. [DOI: 10.1016/j.ejps.2012.08.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 08/08/2012] [Accepted: 08/08/2012] [Indexed: 01/15/2023]
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Masui T, Ota I, Kanno M, Yane K, Hosoi H. Low-intensity ultrasound enhances the anticancer activity of cetuximab in human head and neck cancer cells. Exp Ther Med 2012; 5:11-16. [PMID: 23251234 PMCID: PMC3524017 DOI: 10.3892/etm.2012.739] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 09/28/2012] [Indexed: 11/30/2022] Open
Abstract
The potential clinical use of ultrasound in inducing cell apoptosis and enhancing the effects of anticancer drugs in the treatment of cancers has previously been investigated. In this study, the combined effects of low-intensity ultrasound (LIU) and cetuximab, an anti-epidermal growth factor receptor (EGFR) antibody, on cell killing and induction of apoptosis in HSC-3 and HSC-4 head and neck cancer cells, and its mechanisms were investigated. Experiments were divided into 4 groups: non-treated (CNTRL), cetuximab-treated (CETU), ultrasound-treated (UST) and the combination of cetuximab and US-treated (COMB). Cell viability was assessed by trypan blue staining assay and induction of apoptosis was detected by fluorescein isothiocyanate (FITC)-Annexin V and propidium iodide (PI) staining assay at 24 h after cetuximab and/or US treatment. To elucidate the effect of cetuximab and US on EGFR signaling and apoptosis in head and neck cancer cells after the treatments, the expression of EGFR, phospho-EGFR, and the activation of caspase-3 were evaluated with western blotting. More cell killing features were evident in the COMB group in HSC-3 and HSC-4 cells compared with the other groups. No differences in EGFR expression among the CETU, UST and COMB groups was observed, while the expression of phospho-EGFR in the CETU group was downregulated compared with that in the CNTRL group. Phospho-EGFR expression was much more downregulated in the COMB group compared with that in the other groups. In addition, the activation of caspase-3 in the UST group was upregulated compared with that in the CNTRL group. Caspase-3 activation was much more upregulated in the COMB group than that in the other groups. These data indicated that LIU was able to enhance the anticancer effect of cetuximab in HSC-3 and HSC-4 head and neck cancer cells.
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Affiliation(s)
- Takashi Masui
- Departments of Otolaryngology-Head and Neck Surgery and
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Stanwick JC, Baumann MD, Shoichet MS. Enhanced neurotrophin-3 bioactivity and release from a nanoparticle-loaded composite hydrogel. J Control Release 2012; 160:666-75. [DOI: 10.1016/j.jconrel.2012.03.024] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 03/09/2012] [Accepted: 03/26/2012] [Indexed: 11/28/2022]
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Differential cytotoxicity and sonosensitization by sanazole: effect of cell type and acoustic parameters. J Med Ultrason (2001) 2011; 38:65-72. [DOI: 10.1007/s10396-010-0295-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 11/05/2010] [Indexed: 01/23/2023]
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16
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Feng Y, Tian Z, Wan M. Bioeffects of low-intensity ultrasound in vitro: apoptosis, protein profile alteration, and potential molecular mechanism. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2010; 29:963-974. [PMID: 20498470 DOI: 10.7863/jum.2010.29.6.963] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE The purpose of this study was to evaluate the potential molecular mechanism of low-intensity ultrasound-induced apoptosis by analyzing protein profile alteration in response to ultrasound exposure. METHODS Human hepatocarcinoma SMMC-7721 cells were used in this study. Cell viability was measured by a trypan blue dye exclusion test. Morphologic changes were examined by light microscopy. Apoptosis was assessed by phosphatidylserine externalization and DNA fragmentation. The pattern of the mitochondrial membrane potential decrease was determined by flow cytometry. Protein profile alteration was analyzed by comparative proteomics based on 2-dimensional polyacrylamide gel electrophoresis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RESULTS Low-intensity ultrasound (3.0 W/cm(2), 1 minute, cells incubated for 6 hours after ultrasound exposure) induced early apoptosis (mean +/- SD, 26.5% +/- 6.2%) significantly (P < .05) with minimal lysis in human hepatocarcinoma cells in vitro. On a molecular level, several proteins, eg, cellular tumor antigen protein 53, BH3-interacting domain death agonist, apoptosis regulator Bcl-2, and heme oxygenase 1 were identified as responding to ultrasound irradiation, suggesting that mitochondrial dysfunction and oxidative stresses were involved in ultrasound-induced apoptosis. It was also assumed that mitofilin-regulated crista remodeling may be a potential channel of mitochondrial membrane permeabilization pore formation involved in low-intensity ultrasound-induced apoptosis. CONCLUSIONS This study suggests that 2 potential molecular signaling pathways are involved in ultrasound-induced apoptosis. It is a first step toward low-intensity ultrasound-induced apoptotic cancer therapy via understanding its relevant molecular signaling and key proteins.
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Affiliation(s)
- Yi Feng
- Key Laboratory of Biomedical Information Engineering, Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Furusawa Y, Zhao QL, Hassan MA, Tabuchi Y, Takasaki I, Wada S, Kondo T. Ultrasound-induced apoptosis in the presence of Sonazoid and associated alterations in gene expression levels: A possible therapeutic application. Cancer Lett 2010; 288:107-15. [DOI: 10.1016/j.canlet.2009.06.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Revised: 06/24/2009] [Accepted: 06/25/2009] [Indexed: 01/22/2023]
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18
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Kondo T, Yoshida T, Ogawa R, Hassan MA, Furusawa Y, Zhao QL, Watanabe A, Morii A, Feril LB, Tachibana K, Kitagawa H, Tabuchi Y, Takasaki I, Shehata MH, Kudo N, Tsukada K. Low-intensity ultrasound adjuvant therapy: enhancement of doxorubicin-induced cytotoxicity and the acoustic mechanisms involved. J Med Ultrason (2001) 2009; 36:61. [DOI: 10.1007/s10396-009-0212-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 01/08/2009] [Indexed: 11/25/2022]
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Wang X, Liu Q, Wang P, Wang Z, Tong W, Zhu B, Wang Y, Li C. Comparisons among sensitivities of different tumor cells to focused ultrasound in vitro. ULTRASONICS 2009; 49:558-564. [PMID: 19278708 DOI: 10.1016/j.ultras.2009.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 11/15/2008] [Accepted: 02/03/2009] [Indexed: 05/27/2023]
Abstract
This study is to test the sensitivities of different tumor cells to ultrasound irradiation at the frequency of 2.2 MHz for 60 s duration, and investigate the potential mechanism underlying different sensitivities. Three murine tumor models with distinct aggressiveness (S180, H-22 and EAC) were exposed to ultrasound to evaluate their sonodynamic efficiencies, and several biological parameters such as cell membrane permeability, lipid peroxidation (LPO), ultra-structure observation, intracellular reactive oxygen species (ROS) and mitochondria membrane potential (MMP) were analyzed after exposures. The results showed that cellular responses of different cells were distinct, of interest to note, the aggressive S180 cells were much more sensitive than others, whereas EAC cells were relatively more resistant to ultrasound irradiation. The direct comparisons among different types of cells indicate that the sono-sensitization seems to depend on the physiological and chemical properties of tumor cells. Perhaps sections of cell membrane became destabilized following the initial radical attack and LPO reaction, which caused S180 cells more susceptible to mechanical stresses during sonolysis. This study provides important implications for cancer therapy.
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Affiliation(s)
- XiaoBing Wang
- College of Life Sciences, Shaanxi Normal University, Shaanxi, Xian 710062, China
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Hassan MA, Feril LB, Suzuki K, Kudo N, Tachibana K, Kondo T. Evaluation and comparison of three novel microbubbles: enhancement of ultrasound-induced cell death and free radicals production. ULTRASONICS SONOCHEMISTRY 2009; 16:372-378. [PMID: 19014893 DOI: 10.1016/j.ultsonch.2008.10.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Revised: 09/30/2008] [Accepted: 10/03/2008] [Indexed: 05/27/2023]
Abstract
Three novel lipid-shell-type microbubbles (MBs), AS-0100, BG6356A and BG6356B, have been evaluated for their impact on ultrasound (US)-induced cell death and free radicals production. Previously studied and well-characterized US exposure conditions were employed in which human myelomonocytic lymphoma U937 cells were exposed to 1MHz pulsed US beam (0.3W/cm(2), 10% duty factor) for 1min with or without MBs. Three different concentrations of each MB were used. Apoptosis and cell lysis were assessed by examining phosphatidylserine externalization and by counting viable cells, respectively, 6h post-exposure. Free radicals production and scavenging activities were evaluated using electron paramagnetic resonance (EPR)-spin trapping. The results showed that only AS-0100 and BG6356A were able to enhance the US-induced apoptosis, mainly by increasing the secondary necrosis. Apoptosis and cell lysis seemed to depend more on mechanical forces exerted by oscillating MBs while free radicals played a trivial role. BG series MBs exhibited pronounced scavenging activities. Generally, despite the need for further optimization, AS-0100 and BG6356A appear to be promising as adjuncts in cases where US-induced cell death is required.
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Affiliation(s)
- Mariame A Hassan
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan
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21
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Abstract
Ultrasound-mediated gene transfection (sonotransfection) has been shown to be a promising physical method for gene therapy, especially for cancer gene therapy. The procedure being done in vitro uses several ultrasound exposure (sonication) setups. Although high transfection rates have been attained in some of these setups in vitro, replicating similar levels of transfection in vivo has been difficult. In vivo-simulated setups offer hope for a more consistent outcome in vivo. Presented in this chapter are typical methods of sonotransfection in vitro, methods when using a novel in vivo-simulated in vitro sonication setup and also sonotransfection methods when doing in vivo experiments. Factors that could potentially influence the outcome of an ultrasound experiment are cited. Several advantages of sonotransfection are recognized, although a low transfection rate is still considered a disadvantage of this method. To improve the transfection rate and the efficiency of sonotransfection, several studies are currently being undertaken. Particularly promising are studies using engineered microbubbles to carry the therapeutic genes into a particular target tissue in the body, then using ultrasound to release or deliver the genes directly into target cells, e.g., cancer cells.
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Affiliation(s)
- Loreto B Feril
- Department of Anatomy, Fukuoka University School of Medicine, Fukuoka City, Fukuoka, Japan
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Therapeutic potential of low-intensity ultrasound (part 2): biomolecular effects, sonotransfection, and sonopermeabilization. J Med Ultrason (2001) 2008; 35:161-7. [PMID: 27278987 DOI: 10.1007/s10396-008-0195-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 06/06/2008] [Indexed: 01/16/2023]
Abstract
Part one of this review focused on the thermal and mechanical effects of low-intensity ultrasound (US). In this second and final part of the review, we will focus on and discuss various aspects of low-intensity US, with emphasis on the biomolecular effects, US-mediated gene transfection (sonotransfection), and US-mediated permeabilization (sonopermeabilization). Sonotransfection of different cell lines in vitro and target tissues in vivo have been reported. Optimization experiments have been done and different mechanisms investigated. It has also been found that several genes can be up-regulated or down-regulated by sonication. As to the potential therapeutic applications, systemic or local sonotransfection might also be a safe and effective gene therapy method in effecting the cure of local and systemic disorders. Gene regulation of target cells may be utilized in modifying cellular response to a treatment, such as increasing the sensitivity of diseased cells while making normal cells resistant to the side effects of a treatment. Advances in sonodynamic therapy and drug sonopermeabilization also offer an ever-increasing array of therapeutic options for low-intensity US.
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Therapeutic potential of low-intensity ultrasound (part 1): thermal and sonomechanical effects. J Med Ultrason (2001) 2008; 35:153-60. [PMID: 27278986 DOI: 10.1007/s10396-008-0194-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 06/06/2008] [Indexed: 10/21/2022]
Abstract
In this first part of the review, we will focus on and discuss various aspects of low-intensity ultrasound (US), with emphasis on mild thermal effects, apoptosis induction, and sonomechanical effects. Mild thermal effects of US have been commonly applied to physical therapy. Though US has clear beneficial effects, the advantage of using US over other heating modalities remains unclear. US has also been used in vivo and clinically in the treatment of wounds and fractures, with promising results. On the biomolecular level, studies have shown that US can induce apoptosis and that certain conditions can provide optimal apoptosis induction. As to potential therapeutic applications, in addition to the thermal and other physical effects, apoptosis induction by US may offer direct and rapid treatment of tumors or cancer tissues. Technological advances and rapidly accelerating research in this field are providing an ever-increasing array of therapeutic options for lowintensity US.
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Tachibana K, Feril LB, Ikeda-Dantsuji Y. Sonodynamic therapy. ULTRASONICS 2008; 48:253-259. [PMID: 18433819 DOI: 10.1016/j.ultras.2008.02.003] [Citation(s) in RCA: 154] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Revised: 11/26/2007] [Accepted: 02/28/2008] [Indexed: 05/26/2023]
Abstract
Recently, there have been numerous reports on the application of non-thermal ultrasound energy for treating various diseases in combination with drugs. Furthermore, the introduction of microbubbles and nanobubbles as carriers/enhancers of drugs has added a whole new dimension to therapeutic ultrasound. Non-thermal mechanisms for effects seen include various forms of energy due to cavitation, acoustic streaming, micro jets and radiation force which increases possibilities for targeting tissue with drugs, enhancing drug effectiveness or even chemically activating certain materials. Examples such as enhancement of thrombolytic agents by ultrasound have proven to be beneficial for acute stroke patients and peripheral arterial occlusions. Non-invasive low intensity focused ultrasound in conjunction with anti-cancer drugs may help to reduce tumor size and lessen recurrence while reducing severe drug side effects. Chemical activation of drugs by ultrasound energy for treatment of atherosclerosis and tumors is another new field recently termed as "Sonodynamic therapy". Lastly, advances in molecular imaging have aroused great expectations in applying ultrasound for both diagnosis and therapy simultaneously. Microbubbles or nanobubbles targeted at the molecular level will allow medical doctors to make a final diagnosis of a disease using ultrasound imaging and then immediately proceed to a therapeutic ultrasound treatment.
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Affiliation(s)
- Katsuro Tachibana
- Department of Anatomy, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan, Fukuoka 814-0180, Japan.
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Salunga TL, Cui ZG, Shimoda S, Zheng HC, Nomoto K, Kondo T, Takano Y, Selmi C, Alpini G, Gershwin ME, Tsuneyama K. Oxidative stress-induced apoptosis of bile duct cells in primary biliary cirrhosis. J Autoimmun 2007; 29:78-86. [PMID: 17544621 DOI: 10.1016/j.jaut.2007.04.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 04/04/2007] [Accepted: 04/05/2007] [Indexed: 12/18/2022]
Abstract
There has been a relative paucity of effort at defining effector mechanisms of biliary damage in PBC. We hypothesize that biliary cells are destroyed secondary to the immunologic relationships of inflammation and biliary epithelial apoptosis and, in particular, that biliary damage is a result of reduced levels of glutathione-S-transferase (GST), the production of hypochlorous acid (HOCl) and its association with eosinophil peroxidase (EPO). To address this issue, we examined the expression of EPO and GST in PBC and control livers and demonstrated an increase of EPO within the portal areas of PBC. We also demonstrated that macrophages have evidence of phagocytosed EPO. Furthermore, we studied the influence of HOCl on apoptosis in cultured human biliary epithelial cells (BEC) as well as the associated activity of Bcl-2, Bax, p-JNK, JNK, p53, Fas and caspase-3. HOC1-induced apoptosis in BEC in a dose-dependent fashion increased the activity of caspase-3 and the expression of p53 and p-JNK. Pretreatment with l-buthionine-(S,R)-sulfoximine, a glutathione (GSH) inhibitor, potentiated the sensitivity of BEC to HOCl-induced apoptosis. We conclude that intracellular GSH reduction leads directly to BEC apoptosis. Modulation of these events will be critical to reduce immune-mediated destruction.
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Affiliation(s)
- Thucydides L Salunga
- Department of Pathology I, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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Yoshida T, Kondo T, Ogawa R, Feril LB, Zhao QL, Watanabe A, Tsukada K. Combination of doxorubicin and low-intensity ultrasound causes a synergistic enhancement in cell killing and an additive enhancement in apoptosis induction in human lymphoma U937 cells. Cancer Chemother Pharmacol 2007; 61:559-67. [PMID: 17505825 DOI: 10.1007/s00280-007-0503-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Accepted: 04/19/2007] [Indexed: 10/23/2022]
Abstract
PURPOSE Potential clinical use of ultrasound (US) in enhancing the effects of anticancer drugs in the treatment of cancers has been highlighted in previous reports. Increased uptake of drugs by the cancer cells due to US has been suggested as a mechanism. However, the precise mechanism of the enhancement has not yet been elucidated. Here, the combined effects of low-intensity pulsed US and doxorubicin (DOX) on cell killing and apoptosis induction of U937 cells, and mechanisms involved were investigated. METHODS Human myelomonocytic lymphoma U937 cells were used for the experiments. Experiments were conducted in 4 groups: (1) non-treated, (2) DOX treated (DOX), (3) US treated (US), and (4) combined (DOX + US). In DOX +US, cells were exposed to 5 microM DOX for 30 min and sonicated by 1 MHz pulsed US (PRF 100 Hz, DF 10%) at intensities of 0.2-0.5 W/cm(2) for 60 s. The cells were washed and incubated for 6 h. The viability was evaluated by Trypan blue dye exclusion test and apoptosis and incorporation of DOX was assessed by flow cytometry. Involvement of sonoporation in molecular incorporation was evaluated using FITC-dextran, hydroxyl radical formation was measured by electron paramagnetic resonance-spin trapping, membrane alteration including lipid peroxidation and membrane fluidity by DOX was evaluated using cis-parinaric acid and perylene fluorescence polarization method, respectively. RESULTS Synergistic enhancement in cell killing and additive enhancement in induction of apoptosis were observed at and above 0.3 W/cm(2). No enhancement was observed at 0.2 W/cm(2) in cell killing and induction of apoptosis. Hydroxyl radicals formation was detected at and above 0.3 W/cm(2). The radicals were produced more in the DOX + US than US alone. Incorporation of DOX was increased 13% in DOX + US (vs. DOX) at 0.5 W/cm(2). Involvement of sonoporation for increase of drug uptake was suggested by experiment using FITC-labeled dextran. We made the hypothesis that DOX treatment made the cells weaken against the mechanical effect of the US. Although treatment of DOX at 5 microM for 30 min did not affect lipid peroxidation and fluidity of cell membrane significantly, higher concentration and longer treatment of DOX induced the significant alteration of cell membrane. CONCLUSION Mechanisms of enhancements could be (1) increase in incorporation of the DOX by US involved with sonoporation, (2) enhancement of the cavitation by DOX. Cavitation is required for the enhancement of the effect of DOX. Although the precise involvement of the membrane modifications by DOX in the enhancement remains to be elucidated, they could be involved in the latent effects.
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Affiliation(s)
- Toru Yoshida
- Second Department of Surgery, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, 930-0194, Japan
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Tabuchi Y, Ando H, Takasaki I, Feril LB, Zhao QL, Ogawa R, Kudo N, Tachibana K, Kondo T. Identification of genes responsive to low intensity pulsed ultrasound in a human leukemia cell line Molt-4. Cancer Lett 2007; 246:149-56. [PMID: 16678341 DOI: 10.1016/j.canlet.2006.02.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2005] [Revised: 02/15/2006] [Accepted: 02/15/2006] [Indexed: 11/21/2022]
Abstract
We examined the gene expression of human leukemia Molt-4 cells treated with non-thermal low intensity pulsed ultrasound. Six hours after 0.3W/cm(2) pulsed ultrasound treatment, apoptosis (24+/-3.3%, mean+/-SD) with minimal cell lysis was observed. Of approximately 16,600 genes analyzed, BCL2-associated athanogene 3 (BAG3), DnaJ (Hsp40) homolog, subfamily B, member 1 (DNAJB1), heat shock 70 kDa protein 1B (HSPA1B), and heat shock 70 kDa protein 6 (HSPA6) showed increased levels of expression while isopentenyl-diphosphate delta isomerase (IDI1) and 3-hydroxy-3-methylglutaryl-coenzyme A synthase 1 (HMGCS1) showed decreased levels in the cells 3h after the ultrasound treatment. The expression levels of these six genes were confirmed by a real-time quantitative polymerase chain reaction. To our knowledge, this is the first report of DNA microarray analysis of genes that are differentially expressed in response to apoptosis induced by non-thermal low intensity pulsed ultrasound in human leukemia cells. The present results will provide a basis for further understanding of the molecular mechanisms of effects of not only low intensity pulsed ultrasound but also that of mechanical shear stress in the cells.
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Affiliation(s)
- Yoshiaki Tabuchi
- Division of Molecular Genetics, Life Science Research Center, University of Toyama, 2630 Sugitani, Toyama, Japan.
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Ando H, Feril LB, Kondo T, Tabuchi Y, Ogawa R, Zhao QL, Cui ZG, Umemura SI, Yoshikawa H, Misaki T. An echo-contrast agent, Levovist, lowers the ultrasound intensity required to induce apoptosis of human leukemia cells. Cancer Lett 2006; 242:37-45. [PMID: 16377079 DOI: 10.1016/j.canlet.2005.10.032] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Accepted: 10/24/2005] [Indexed: 10/25/2022]
Abstract
To verify the effect of echo-contrast agent (ECA) on apoptosis induced by ultrasound, leukemia cell lines (Jurkat, Molt-4 and U937) were sonicated at intensities previously shown to induce optimal apoptosis with or without Levovist, an ECA. The results showed that loss of viability and apoptosis can be induced in all three cell lines, apoptosis highest with Molt-4, based on viability and DNA fragmentation assay. Such finding was supported by corresponding increase of cells with low mitochondrial membrane potential, high superoxide production, increased intracellular calcium concentration, and phosphorylation of histone H2AX after sonication. Optimal ultrasound condition was 0.3W/cm(2), 1MHz, 10% duty factor pulsed at 100Hz; but in the presence of Levovist, an apparent shift of cell killing induction was observed at 0.2W/cm(2). While these results further confirmed previous findings on ultrasound-induced apoptosis, they also suggest that use of an enhancing factor, such as addition of ECA, may be useful in cancer therapy when a much lower intensity is desired.
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Affiliation(s)
- Hidetaka Ando
- First Department of Surgery, Faculty of Medicine, Toyama Medical and Pharmaceutical University, Toyama 930-0194, Japan
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Hiraoka W, Honda H, Feril LB, Kudo N, Kondo T. Comparison between sonodynamic effect and photodynamic effect with photosensitizers on free radical formation and cell killing. ULTRASONICS SONOCHEMISTRY 2006; 13:535-42. [PMID: 16325451 DOI: 10.1016/j.ultsonch.2005.10.001] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2005] [Revised: 09/27/2005] [Accepted: 10/03/2005] [Indexed: 05/05/2023]
Abstract
Although enhancement of ultrasound-induced cell killing by photodynamic reagents has been shown, the sonochemical mechanism in detail is still not clear. Here, comparison between sonodynamic effect and photodynamic effect with photosensitizers at a concentration of 10 microM on free radical formation and cell killing was made. When electron paramagnetic-resonance spectroscopy (EPR) was used to detect 2,2,6,6-tetramethyl-4-piperidone-N-oxyl (TAN) after photo-irradiation or sonication with 2,2,6,6-tetramethyl-4-piperidone (TMPD), the order of TAN formation in the photo-irradiated samples was as follows: rhodamine 6G (R6) > sulforhodamine B (SR) > hematoporphyrin (Hp) > rhodamine 123 (R123) > rose bengal (RB)>erythrosine B (Er) = 0; although there was time-dependent TAN formation when the samples were sonicated, no significant difference among these agents were observed. All these agents suppressed ultrasound-induced OH radical formation detected by EPR-spin trapping. Sensitizer-derived free radicals were markedly observed in SR, RB and Er, while trace level of radicals derived from R6 and R123 were observed. Enhancement of ultrasound-induced decrease of survival in human lymphoma U937 cells was observed at 1.5 W/cm(2) (less than inertial cavitation threshold) for R6, R123, SR and Er, and at 2.3 W/cm(2) for R6, R123, Er, RB and SR. On the other hand, photo-induced decrease of survival was observed for R6, Hp and RB at the same concentration (10 microM). These comparative results suggest that (1) (1)O(2) is not involved in the enhancement of ultrasound-induced loss of cell survival, (2) OH radicals and sensitizer-derived free radicals do not take part in the enhancement, and (3) the mechanism is mainly due to certain mechanical stress such as augmentation of physical disruption of cellular membrane by sensitizers in the close vicinity of cells and/or cavitation bubbles.
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Affiliation(s)
- Wakako Hiraoka
- Department of Physics, School of Science and Technology, Meiji University, Kawasaki, Japan
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Feril LB, Kondo T. Ultrasound liberates nitric oxide (NO) from the caged NO compound N,N'-bis(carboxymethyl)-N,N'-dinitroso-p-phenylenediamine sodium salt. ULTRASONICS SONOCHEMISTRY 2006; 13:397-400. [PMID: 16168699 DOI: 10.1016/j.ultsonch.2005.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2005] [Revised: 06/02/2005] [Accepted: 06/07/2005] [Indexed: 05/04/2023]
Abstract
To determine whether nitric oxide (NO) can be released from a cage compound N,N'-bis(carboxymethyl)-N,N'-dinitroso-p-phenylenediamine sodium salt (BNN 5 Na), we sonicated different concentrations of BNN 5 Na solutions containing an NO spin trap, (MGD)2Fe2+, and then measured (MGD)2Fe2+-NO signal using electron paramagnetic resonance (EPR). We also investigated the role of cavitation by saturating the solutions with Ar, He or Xe gases before sonication. The result showed that ultrasound can liberate NO from caged NO compound at rates highest with Xe and lowest with He. These results suggest that high-temperature due to cavitations induced by ultrasound are capable of releasing NO from caged NO compounds. This finding also opens up to a new possibility for the use of ultrasound in a controlled release of active compound (e.g. drug) from its caged form for therapeutic purposes.
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Affiliation(s)
- Loreto B Feril
- Department of Radiological Sciences, Faculty of Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama 930-0194, Japan
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Feril LB, Kondo T. Biological effects of low intensity therapeutic ultrasound in vitro: the potentials for therapy and the implications on safety of diagnostic ultrasound. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.ics.2004.07.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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