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Zhang W, Nan SL, Bai WK, Hu B. Low-frequency ultrasound combined with microbubbles improves gene transfection in prostate cancer cells in vitro and in vivo. Asia Pac J Clin Oncol 2021; 18:93-98. [PMID: 33644984 DOI: 10.1111/ajco.13521] [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: 02/11/2020] [Accepted: 10/30/2020] [Indexed: 01/16/2023]
Abstract
OBJECTIVES The aim of this study is to explore whether low-frequency ultrasound combined with microbubbles improves pEGFP genes transfection into human prostate cancer cells. METHODS Ultrasound with frequency of 80 kHz and duty cycle of 50% was adopted in the study; in in vitro experiments, cell lysis, and membrane damage were evaluated after ultrasound exposure; and the membrane continuity and transfection efficiency were observed by transmission electron microscope and laser scanner, respectively. Human prostate cancer xenograft models were exposed to ultrasound and transfection efficiency and histological examination were analyzed. RESULTS Compared with the control group, ultrasound combined with microbubbles significantly improves gene transfection efficiency (P < .05). In in vitro study, ultrasound combined with microbubbles resulted in cell lysis and the interruption of cell membrane continuity, and its average transfection efficiency was 9.9%; the green fluorescence intensity was 15.2% in the ultrasound combined with microbubbles group in vivo; both values were higher than that in the control group (P < .05). CONCLUSION Low-frequency ultrasound combined with microbubbles could be used as a method to promote gene transfection in prostate cancer cells.
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Affiliation(s)
- Wei Zhang
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Shu-Liang Nan
- Ultrasonic Diagnosis Center, Shanxi People's Hospital, Xi'an, China
| | - Wen-Kun Bai
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Bing Hu
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Institute of Ultrasound in Medicine, Shanghai, China
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Yuan H, Hu H, Sun J, Shi M, Yu H, Li C, Sun YU, Yang Z, Hoffman RM. Ultrasound Microbubble Delivery Targeting Intraplaque Neovascularization Inhibits Atherosclerotic Plaque in an APOE-deficient Mouse Model. In Vivo 2018; 32:1025-1032. [PMID: 30150423 DOI: 10.21873/invivo.11342] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/21/2018] [Accepted: 06/28/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND/AIM Intraplaque neovascularization is often associated with plaque formation, development and instability, and clinical symptoms in atherosclerosis. The aim of the present study was to investigate a new strategy for treating athrosclerosis by ultrasound-targeted microbubble delivery (UTMD) targeting intraplaque neovascularization in an APOE-deficient mouse model of atherosclerosis. MATERIALS AND METHODS A mouse model of atherosclerosis was induced by feeding Apoe-/- mice a hypercholesterolemic diet and was verified with hematoxylin and eosin staining and intercellular adhesion molecule 1 (ICAM-1) expression. Targeted microbubbles (MB) were prepared by conjugating microbubbles with biotinylated antibody to ICAM1 (MBi) or with both biotinylated anti-ICAM1 and the angiogenesis inhibitor Endostar (MBie). The targeted microbubbles were analyzed with epifluorescence microscopy and flow cytometry. The animals with induced atherosclerotic plaques received MBi or MBie followed by UTMD treatment. Endostar treatment alone was given to other animals for comparison. Morphological assessment of atherosclerotic plaques was performed after treatment. The expression of angiogenesis marker CD31 was detected by immunohistochemical analysis. RESULTS Atherosclerotic plaques developed in the entire aorta with significant intraplaque ICAM-1 expression in the APOE-deficient mice following a 30-week hypercholesterolemic diet. Microbubbles were successfully conjugated with anti-ICAM-1 and Endostar, with a conjugation rate of 98.3% and 63.5%, respectively. UTMD with MBie significantly reduced the area of atherosclerotic plaque as compared to the model control (p<0.05). Treatment with Endostar and UTMD with MBie significantly reduced CD31 expression compared with the model control group (p<0.01). Greater significant inhibitory effect on CD31 expression was found in the group treated with UTMD and MBie compared to the Endostar- and UTMD with MBi groups (p<0.01). CONCLUSION UTMD targeting intraplaque neovascularization was found to inhibit atherosclerotic plaque in a mouse model of atherosclerosis, suggesting the potential of microbubble-mediated ultrasound technology in aiding drug delivery for atherosclerosis treatment.
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Affiliation(s)
- Hong Yuan
- Yuhang District First People's Hospital, Hangzhou, P.R. China
| | - Haiqiang Hu
- Yuhang District First People's Hospital, Hangzhou, P.R. China
| | - Jindong Sun
- Yuhang District First People's Hospital, Hangzhou, P.R. China
| | - Mingjuan Shi
- Yuhang District First People's Hospital, Hangzhou, P.R. China
| | - Huamin Yu
- Yuhang District First People's Hospital, Hangzhou, P.R. China
| | - Cairong Li
- Medical College of Hangzhou Normal University, Hangzhou, P.R. China
| | - Y U Sun
- Origin Biosciences Inc., Nanjing, P.R. China
| | - Zhijian Yang
- Origin Biosciences Inc., Nanjing, P.R. China.,AntiCancer, Inc., San Diego, CA, U.S.A
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Escoffre JM, Derieppe M, Lammertink B, Bos C, Moonen C. Microbubble-Assisted Ultrasound-Induced Transient Phosphatidylserine Translocation. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:838-851. [PMID: 28109698 DOI: 10.1016/j.ultrasmedbio.2016.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 11/26/2016] [Accepted: 12/07/2016] [Indexed: 06/06/2023]
Abstract
Microbubble-assisted ultrasound (sonopermeabilization) results in reversible permeabilization of the plasma membrane of cells. This method is increasingly used in vivo because of its potential to deliver therapeutic molecules with limited cell damage. Nevertheless, the effects of sonopermeabilization on the plasma membrane remain not fully understood. We investigated the influence of sonopermeabilization on the transverse mobility of phospholipids, especially on phosphatidylserine (PS) externalization. We performed studies using optical imaging with Annexin V and FM1-43 probes to monitor PS externalization of rat glioma C6 cells. Sonopermeabilization induced transient membrane permeabilization, which is positively correlated with reversible PS externalization. This membrane disorganization was temporary and not associated with loss of cell viability. Sonopermeabilization did not induce PS externalization via activation of the scramblase. We hypothesize that acoustically induced membrane pores may provide a new pathway for PS migration between both membrane leaflets. During the membrane-resealing phase, PS asymmetry may be re-established by amino-phospholipid flippase activity and/or endocytosis, along with exocytosis processes.
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Affiliation(s)
| | - Marc Derieppe
- Imaging Division, UMC Utrecht, Utrecht, The Netherlands
| | | | - Clemens Bos
- Imaging Division, UMC Utrecht, Utrecht, The Netherlands
| | - Chrit Moonen
- Imaging Division, UMC Utrecht, Utrecht, The Netherlands
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Bai WK, Zhang W, Hu B, Ying T. Liposome-mediated transfection of wild-type P53 DNA into human prostate cancer cells is improved by low-frequency ultrasound combined with microbubbles. Oncol Lett 2016; 11:3829-3834. [PMID: 27313702 DOI: 10.3892/ol.2016.4477] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 03/24/2016] [Indexed: 01/30/2023] Open
Abstract
Prostate cancer is a common type of cancer in elderly men. The aim of the present study was to evaluate the effects of ultrasound exposure in combination with SonoVue microbubbles on liposome-mediated transfection of wild-type P53 genes into human prostate cancer cells. PC-3 human prostate cancer cells were exposed to ultrasound; duty cycle was controlled at 20% (2 sec on, 8 sec off) for 5 min with and without SonoVue microbubble echo-contrast agent using a digital sonifier (frequency, 21 kHz; intensity, 46 mW/cm2). The cells were divided into eight groups, as follows: Group A (SonoVue + wild-type P53), group B (ultrasound + wild-type P53), group C (SonoVue + ultrasound + wild-type P53), group D (liposome + wild-type P53), group E (liposome + SonoVue + wild-type P53), group F (liposome + wild-type P53 + ultrasound), group G (liposome + wild-type P53 + ultrasound + SonoVue) and the control group (wild-type P53). Following treatment, a hemocytometer was used to measure cell lysis, reverse transcription-quantitative polymerase chain reaction and western blotting were performed to detect P53 gene transfection efficiency, Cell Counting Kit-8 was employed to reveal cell proliferation and Annexin V/propidium iodide staining was used to determine cell apoptosis. Cell lysis was minimal in each group. Wild-type P53 gene and protein expression were significantly increased in the PC-3 cells in group G compared with the control and all other groups (P<0.01). Cell proliferation was significantly suppressed in group G compared with the control group and all other groups (P<0.01). Cell apoptosis levels in group G were significantly improved compared with the control group and all other groups (P<0.01). Thus, the results of the present study indicate that the use of low-frequency and low-energy ultrasound in combination with SonoVue microbubbles may be a potent physical method for increasing liposome gene delivery efficiency.
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Affiliation(s)
- Wen-Kun Bai
- Department of Ultrasound in Medicine, Shanghai Institute of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Wei Zhang
- Department of Ultrasound in Medicine, Shanghai Institute of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Bing Hu
- Department of Ultrasound in Medicine, Shanghai Institute of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Tao Ying
- Department of Ultrasound in Medicine, Shanghai Institute of Ultrasound in Medicine, Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, P.R. China
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LIU YANMIN, LI XUANFEI, LIU HAO, WU XIAOLING. Ultrasound-targeted microbubble destruction-mediated downregulation of CD133 inhibits epithelial-mesenchymal transition, stemness and migratory ability of liver cancer stem cells. Oncol Rep 2015; 34:2977-86. [DOI: 10.3892/or.2015.4270] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 07/29/2015] [Indexed: 11/06/2022] Open
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Derieppe M, Rojek K, Escoffre JM, de Senneville BD, Moonen C, Bos C. Recruitment of endocytosis in sonopermeabilization-mediated drug delivery: a real-time study. Phys Biol 2015; 12:046010. [PMID: 26118644 DOI: 10.1088/1478-3975/12/4/046010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Microbubbles (MBs) in combination with ultrasound (US) can enhance cell membrane permeability, and have the potential to facilitate the cellular uptake of hydrophilic molecules. However, the exact mechanism behind US- and MB-mediated intracellular delivery still remains to be fully understood. Among the proposed mechanisms are formation of transient pores and endocytosis stimulation. In our study, we investigated whether endocytosis is involved in US- and MB-mediated delivery of small molecules. Dynamic fluorescence microscopy was used to investigate the effects of endocytosis inhibitors on the pharmacokinetic parameters of US- and MB-mediated uptake of SYTOX Green, a 600 Da hydrophilic model drug. C6 rat glioma cells, together with SonoVue(®) MBs, were exposed to 1.4 MHz US waves at 0.2 MPa peak-negative pressure. Collection of the signal intensity in each individual nucleus was monitored during and after US exposure by a fibered confocal fluorescence microscope designed for real-time imaging. Exposed to US waves, C6 cells pretreated with chlorpromazine, an inhibitor of clathrin-mediated endocytosis, showed up to a 2.5-fold significant increase of the uptake time constant, and a 1.1-fold increase with genistein, an inhibitor of caveolae-mediated endocytosis. Both inhibitors slowed down the US-mediated uptake of SYTOX Green. With C6 cells and our experimental settings, these quantitative data indicate that endocytosis plays a role in sonopermeabilization-mediated delivery of small molecules with a more predominant contribution of clathrin-mediated endocytosis.
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Affiliation(s)
- Marc Derieppe
- Imaging Division, University Medical Center Utrecht, Utrecht, Netherlands
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Zhang C, Huang P, Zhang Y, Chen J, Shentu W, Sun Y, Yang Z, Chen S. Anti-tumor efficacy of ultrasonic cavitation is potentiated by concurrent delivery of anti-angiogenic drug in colon cancer. Cancer Lett 2014; 347:105-13. [DOI: 10.1016/j.canlet.2014.01.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 01/09/2014] [Accepted: 01/24/2014] [Indexed: 02/07/2023]
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Sorace AG, Warram JM, Mahoney M, Zinn KR, Hoyt K. Enhancement of adenovirus delivery after ultrasound-stimulated therapy in a cancer model. ULTRASOUND IN MEDICINE & BIOLOGY 2013; 39:2374-81. [PMID: 24063960 PMCID: PMC4006627 DOI: 10.1016/j.ultrasmedbio.2013.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/29/2013] [Accepted: 07/30/2013] [Indexed: 05/06/2023]
Abstract
Improving the efficiency of adenovirus (Ad) delivery to target tissues has the potential to advance the translation of cancer gene therapy. Ultrasound (US)-stimulated therapy uses microbubbles (MBs) exposed to low-intensity US energy to improve localized delivery. We hypothesize that US-stimulated gene therapy can improve Ad infection in a primary prostate tumor through enhanced tumor uptake and retention of the Ad vector. In vitro studies were performed to analyze the degree of Ad infectivity after application of US-stimulated gene therapy. A luciferase-based Ad on a ubiquitous cytomegalovirus (CMV) promoter (Ad5/3-CMV-Luc) was used in an animal model of prostate cancer (bilateral tumor growth) to evaluate Ad transduction efficiency after US-stimulated therapy. Bioluminescence imaging was employed for in vivo analysis to quantify Ad infection within the tumor. In vitro studies revealed no difference in Ad transduction between groups receiving US-stimulated therapy using high, low or sham US intensity exposures at various multiplicities of infection (MOIs) (p = 0.80). In vivo results indicated that tumors receiving US-stimulated therapy after intra-tumoral injection of Ad5/3-CMV-Luc (1 × 10(6) plaque-forming units) exhibited a 95.1% enhancement in tumor delivery compared with control tumors receiving sham US (p = 0.03). US-stimulated therapy has significant potential to immediately affect Ad-based cancer gene therapy by improving virus bioavailability in target tissues.
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Affiliation(s)
- Anna G. Sorace
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jason M. Warram
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Marshall Mahoney
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kurt R. Zinn
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Electrical & Computer Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kenneth Hoyt
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Department of Electrical & Computer Engineering, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Huang P, You X, Pan M, Li S, Zhang Y, Zhao Y, Wang M, Hong Y, Pu Z, Chen L, Yang G, Guo Y. A novel therapeutic strategy using ultrasound mediated microbubbles destruction to treat colon cancer in a mouse model. Cancer Lett 2013; 335:183-90. [DOI: 10.1016/j.canlet.2013.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 02/04/2013] [Accepted: 02/05/2013] [Indexed: 10/27/2022]
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10
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Yin T, Wang P, Li J, Zheng R, Zheng B, Cheng D, Li R, Lai J, Shuai X. Ultrasound-sensitive siRNA-loaded nanobubbles formed by hetero-assembly of polymeric micelles and liposomes and their therapeutic effect in gliomas. Biomaterials 2013; 34:4532-43. [DOI: 10.1016/j.biomaterials.2013.02.067] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 02/24/2013] [Indexed: 12/16/2022]
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Chang S, Guo J, Sun J, Zhu S, Yan Y, Zhu Y, Li M, Wang Z, Xu RX. Targeted microbubbles for ultrasound mediated gene transfection and apoptosis induction in ovarian cancer cells. ULTRASONICS SONOCHEMISTRY 2013; 20:171-179. [PMID: 22841613 PMCID: PMC4332827 DOI: 10.1016/j.ultsonch.2012.06.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Revised: 06/22/2012] [Accepted: 06/27/2012] [Indexed: 05/11/2023]
Abstract
Ultrasound-targeted microbubble destruction (UTMD) technique can be potentially used for non-viral delivery of gene therapy. Targeting wild-type p53 (wtp53) tumor suppressor gene may provide a clinically promising treatment for patients with ovarian cancer. However, UTMD mediated gene therapy typically uses non-targeted microbubbles with suboptimal gene transfection efficiency. We synthesized a targeted microbubble agent for UTMD mediated wtp53 gene therapy in ovarian cancer cells. Lipid microbubbles were conjugated with a Luteinizing Hormone-Releasing Hormone analog (LHRHa) via an avidin-biotin linkage to target the ovarian cancer A2780/DDP cells that express LHRH receptors. The microbubbles were mixed with the pEGFP-N1-wtp53 plasmid. Upon exposure to 1 MHz pulsed ultrasound beam (0.5 W/cm(2)) for 30s, the wtp53 gene was transfected to the ovarian cancer cells. The transfection efficiency was (43.90 ± 6.19)%. The expression of wtp53 mRNA after transfection was (97.08 ± 12.18)%. The cell apoptosis rate after gene therapy was (39.67 ± 5.95)%. In comparison with the other treatment groups, ultrasound mediation of targeted microbubbles yielded higher transfection efficiency and higher cell apoptosis rate (p<0.05). Our experiment verifies the hypothesis that ultrasound mediation of targeted microbubbles will enhance the gene transfection efficiency in ovarian cancer cells.
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Affiliation(s)
- Shufang Chang
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Juan Guo
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Jiangchuan Sun
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Shenyin Zhu
- Department of Pharmacy, First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Yu Yan
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Yi Zhu
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Min Li
- Department of Obstetrics and Gynecology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Zhigang Wang
- Institute of Ultrasound Imaging, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Ronald X. Xu
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
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Use of EPR and FTIR to detect biological effects of ultrasound and microbubbles on a fibroblast cell line. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 40:1115-20. [DOI: 10.1007/s00249-011-0738-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 07/06/2011] [Accepted: 07/19/2011] [Indexed: 12/20/2022]
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Reslan L, Mestas JL, Herveau S, Béra JC, Dumontet C. Transfection of cells in suspension by ultrasound cavitation. J Control Release 2009; 142:251-8. [PMID: 19896995 DOI: 10.1016/j.jconrel.2009.10.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2009] [Revised: 10/16/2009] [Accepted: 10/26/2009] [Indexed: 01/04/2023]
Abstract
Sonoporation holds many promises in developing an efficient, reproducible and permanent gene delivery vector. In this study, we evaluated sonoporation as a method to transfect nucleic acids in suspension cells, including the human follicular lymphoma cell line RL and fresh human Chronic Lymphocytic Leukemia (CLL) cells. RL and CLL cells were exposed to continuous ultrasound waves (445 kHz) in the presence of either plasmid DNA coding for green fluorescent protein (GFP) or fluorescent siRNA directed against BCL2L1. Transfection efficiency and cell viability were assessed using fluorescent microscopy and flow cytometry analysis, respectively. Knock-down of target protein by siRNA was assessed by immunoblotting. Moreover, sonoporation was used to stably transfect RL cells with a plasmid coding for luciferase (pGL3). These cells were then used for the non-invasive monitoring of tumorigenesis in immunodeficient SCID mice. Sonoporation allows a highly efficient transfection of nucleic acid in suspension cells with a low rate of mortality, both in a tumor cell line and in fresh human leukemic cells. It also allowed efficient transfection of BCL2L1 siRNA with efficient reduction of the target protein level. In conclusion, ultrasound cavitation represents an efficient method for the transfection of cells in suspension, including fresh human leukemic cells.
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Chen Z, Liang K, Xie M, Wang X, Lü Q, Zhang J. Novel ultrasound-targeted microbubble destruction mediated short hairpin RNA plasmid transfection targeting survivin inhibits gene expression and induces apoptosis of HeLa cells. Mol Biol Rep 2009; 36:2059-67. [PMID: 18991017 DOI: 10.1007/s11033-008-9417-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2008] [Accepted: 10/29/2008] [Indexed: 10/21/2022]
Abstract
Survivin is an attractive target for tumor growth inhibition and represents a significant approach to anticancer therapy. RNA interference is an important tool for specifically down-regulating the expression of cellular genes. However, the efficiency of short hairpin RNA (shRNA) on the expression of survivin gene and the influence on the cell apoptosis transfected by the non-viral gene transfer system of ultrasound-targeted microbubble destruction was not explored. In this work, recombinant expression plasmid of shRNA targeting survivin gene was constructed and added to cultured cervical cancer cells followed by ultrasound exposure and SonoVue((R)) microbubble. Expression of survivin mRNA and protein were assessed by RT-PCR and western blot analysis. Apoptosis ratio was quantified by flow cytometry marked with annexin V and 7-AAD. After transfected for 48 h, the expression of survivin mRNA and protein were (16.67 +/- 2.73)% and (21.33 +/- 3.55)%, respectively. The apoptosis rate was (45.41 +/- 1.47)%. The differences were significant as compared with other groups (P < 0.01). In conclusion, we suggested that survivin could be regarded as an ideal anticancer target of cervical cancer. Recombinant expression plasmid of shRNA targeting survivin gene mediated by ultrasound-targeted microbubble destruction technique could effectively inhibit the expression of target gene and induce cell apoptosis. This novel method for RNA interference represents a powerful, promising non-viral technology that can be used in the tumor gene therapy and research.
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Affiliation(s)
- Zhiyi Chen
- Department of Medical Ultrasound, The Third Affiliated Hospital of Guangzhou Medical College, Guangzhou 510150, China.
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