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Zhao S, Zou J, Wang H, Qin J, Lu X, Zhang A, Xu LX. A new radiofrequency balloon angioplasty device for atherosclerosis treatment. Biomed Eng Online 2020; 19:44. [PMID: 32522205 PMCID: PMC7288419 DOI: 10.1186/s12938-020-00790-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 06/04/2020] [Indexed: 11/10/2022] Open
Abstract
Background Restenosis remains a challenge in the treatment of atherosclerosis due to damage to the endothelial layer and induced proliferation of smooth muscle cells. A novel radiofrequency (RF) heating strategy was proposed to selectively ablate atherosclerosis plaque and to thermally inhibit the proliferation of smooth muscle cells while keeping the endothelial cells intact. Methods To realize the proposed strategy, a new radiofrequency balloon catheter, consisting of three ports, a three-channel tube, a balloon and an electrode patch, was designed. To evaluate the feasibility of this new design, a phantom experiment with thermocouples measuring temperatures with different voltages applied to the electrodes was conducted. A numerical model was established to obtain the 3D temperature distribution. The heating ability was also evaluated in ex vivo diseased artery samples. Results The experimental results showed that the highest temperature could be achieved in a distance from the surface of the balloon as designed. The temperature differences between the highest temperature at 0.78 mm and those of the surface reached 9.87 °C, 12.55 °C and 16.00 °C under applied 15 V, 17.5 V and 20 V heating, respectively. In the circumferential direction, the heating region (above 50 °C) spread from the middle of the two electrodes. The numerical results showed that the cooling effect counteracted the electrical energy deposition in the region close to the electrodes. The thermal lesion could be directed to cover the diseased media away from the catheter surface. The ex vivo heating experiment also confirmed the selective heating ability of the device. The temperature at the targeted site quickly reached the set value. The temperature of the external surface was higher than the inner wall surface temperature of the diseased artery lumen. Conclusion Both the experimental and numerical results demonstrated the feasibility of the newly designed RF balloon catheter. The proposed RF microelectrodes heating together with the cooling water convection can realize the desired heating in the deeper site of the blood vessel wall while sparing the thin layer of the endothelium.
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Affiliation(s)
- Shiqing Zhao
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jincheng Zou
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Hongying Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jinbao Qin
- Department of Vascular Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xinwu Lu
- Department of Vascular Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Aili Zhang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
| | - Lisa X Xu
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
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Kantidze OL, Velichko AK, Razin SV. Heat Stress-Induced Transcriptional Repression. BIOCHEMISTRY (MOSCOW) 2016; 80:990-3. [PMID: 26547066 DOI: 10.1134/s0006297915080039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Heat stress is one of the most popular models for studying the regulation of gene expression. For decades, researchers' attention was focused on the study of the mechanisms of transcriptional activation of stress-induced genes. Although the phenomenon of heat stress-induced global transcriptional repression is known for a long time, the exact molecular mechanisms of such a repression are poorly explored. In this mini-review, we attempt to summarize the existing experimental data on heat stress-induced transcriptional repression.
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Affiliation(s)
- O L Kantidze
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334, Russia.
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Muddineti OS, Ghosh B, Biswas S. Current trends in using polymer coated gold nanoparticles for cancer therapy. Int J Pharm 2015; 484:252-67. [DOI: 10.1016/j.ijpharm.2015.02.038] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 02/11/2015] [Accepted: 02/14/2015] [Indexed: 02/06/2023]
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Wei C, Shen E, Sun D, Zhang A, Sun J, Hu B. Assessment of alternated cooling and heating treatment by US combined CEUS in the VX2 rabbit liver tumor model. CHINESE SCIENCE BULLETIN-CHINESE 2014. [DOI: 10.1007/s11434-013-0098-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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KARIYA AYAKO, TABUCHI YOSHIAKI, YUNOKI TATSUYA, KONDO TAKASHI. Identification of common gene networks responsive to mild hyperthermia in human cancer cells. Int J Mol Med 2013; 32:195-202. [DOI: 10.3892/ijmm.2013.1366] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 03/14/2013] [Indexed: 11/05/2022] Open
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Tabuchi Y, Furusawa Y, Kariya A, Wada S, Ohtsuka K, Kondo T. Common gene expression patterns responsive to mild temperature hyperthermia in normal human fibroblastic cells. Int J Hyperthermia 2013; 29:38-50. [PMID: 23311377 DOI: 10.3109/02656736.2012.753163] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Heat stress induces complex cellular responses, and its detailed molecular mechanisms still remain to be clarified. The objective of this study was to investigate the molecular mechanisms underlying cellular responses to mild hyperthermia (MHT) in normal human fibroblastic (NHF) cells. MATERIALS AND METHODS Cells were treated with MHT (41°C, 30 min) and then cultured at 37°C. Gene expression was determined by the GeneChip® system and bioinformatics tools. RESULTS Treatment of the NHF cell lines, Hs68 and OUMS-36, with MHT did not affect the cell viability or cell cycle. In contrast, many probe sets were differentially expressed by >1.5-fold in both cell lines after MHT treatment. Of the 1,196 commonly and differentially expressed probe sets analysed by k-means clustering, three gene clusters, Up-I, Down-I and Down-II, were observed. Interestingly, two gene networks were obtained from the up-regulated genes in cluster Up-I. The gene network E contained DDIT3 and HSPA5 and was mainly associated with the biological process of endoplasmic reticulum stress, while the network S contained HBEGF and LIF and was associated with the biological process of cell survival. Eighteen genes were validated by quantitative real-time polymerase chain reaction, consistent with the microarray data, in four kinds of NHF cells. CONCLUSIONS Common genes that were differentially expressed and/or acted within a gene network in response to MHT in NHF cells were identified. These findings provide the molecular basis for a further understanding of the mechanisms of the MHT response in NHF cells.
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Affiliation(s)
- Yoshiaki Tabuchi
- Division of Molecular Genetics Research, Life Science Research Centre, University of Toyama, Japan.
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Furusawa Y, Tabuchi Y, Takasaki I, Wada S, Ohtsuka K, Kondo T. Gene networks involved in apoptosis induced by hyperthermia in human lymphoma U937 cells. Cell Biol Int 2013; 33:1253-62. [DOI: 10.1016/j.cellbi.2009.08.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Revised: 06/22/2009] [Accepted: 08/25/2009] [Indexed: 01/06/2023]
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Garcia MP, Cavalheiro JRT, Fernandes MH. Acute and long-term effects of hyperthermia in B16-F10 melanoma cells. PLoS One 2012; 7:e35489. [PMID: 22532856 PMCID: PMC3332049 DOI: 10.1371/journal.pone.0035489] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 03/16/2012] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE Hyperthermia uses exogenous heat induction as a cancer therapy. This work addresses the acute and long-term effects of hyperthermia in the highly metastatic melanoma cell line B16-F10. MATERIALS AND METHODS Melanoma cells were submitted to one heat treatment, 45°C for 30 min, and thereafter were kept at 37°C for an additional period of 14 days. Cultures maintained at 37°C were used as control. Cultures were assessed for the heat shock reaction. RESULTS Immediately after the heat shock, cells began a process of fast degradation, and, in the first 24 h, cultures showed decreased viability, alterations in cell morphology and F-actin cytoskeleton organization, significant reduction in the number of adherent cells, most of them in a process of late apoptosis, and an altered gene expression profile. A follow-up of two weeks after heat exposure showed that viability and number of adherent cells remained very low, with a high percentage of early apoptotic cells. Still, heat-treated cultures maintained a low but relatively constant population of cells in S and G(2)/M phases for a long period after heat exposure, evidencing the presence of metabolically active cells. CONCLUSION The melanoma cell line B16-F10 is susceptible to one hyperthermia treatment at 45°C, with significant induced acute and long-term effects. However, a low but apparently stable percentage of metabolically active cells survived long after heat exposure.
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Affiliation(s)
- Mónica Pereira Garcia
- Laboratório de Farmacologia e Biocompatibilidade Celular, Faculdade de Medicina Dentária, Universidade do Porto (FMDUP), Porto, Portugal
| | | | - Maria Helena Fernandes
- Laboratório de Farmacologia e Biocompatibilidade Celular, Faculdade de Medicina Dentária, Universidade do Porto (FMDUP), Porto, Portugal
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Abstract
PURPOSE OF REVIEW To present evidence of the role of innate mucosal immunity and to harness this arm of immunity in protection against HIV infection. RECENT FINDINGS Dendritic cells, monocytes, natural killer (NK) cells and γδ T cells are critical in innate immunity, which is mediated by Toll-like receptor (TLR) and recently identified stress pathways. Complement factors, cytokines and chemokines have diverse functions usually affecting HIV infection indirectly. A novel group of innate intracellular HIV restriction factors has been identified - APOBEC3G, TRIM5α and tetherin - all of which are upregulated by type I interferons and some by vaccination and TLR agonists. Whereas innate immunity conventionally lacks memory, recent evidence suggests that some of the cells and intracellular factors may express immunological memory-like features. SUMMARY Innate mucosal immunity may provide early effective control of HIV transmission and replication. Some vaccines can enhance innate immune factors, such as APOBEC3G and control HIV during the eclipse period, allowing full weight of neutralizing and/or cytotoxic T cells to develop and prevent mucosal HIV infection. The next generation of vaccines should be designed to target both innate and adaptive immune memory responses.
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Affiliation(s)
- Yufei Wang
- Mucosal Immunology Unit at Guy's Hospital, King's College London, London, UK
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Study of alternate cooling and heating treatment induced tumor microvasculature injury. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11434-009-0508-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tabuchi Y, Takasaki I, Wada S, Zhao QL, Hori T, Nomura T, Ohtsuka K, Kondo T. Genes and genetic networks responsive to mild hyperthermia in human lymphoma U937 cells. Int J Hyperthermia 2009; 24:613-22. [DOI: 10.1080/02656730802140777] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Accelerated perinecrotic outgrowth of colorectal liver metastases following radiofrequency ablation is a hypoxia-driven phenomenon. Ann Surg 2009; 249:814-23. [PMID: 19387320 DOI: 10.1097/sla.0b013e3181a38ef5] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The aim of this study was to assess how thermal ablation of colorectal liver metastases affects the outgrowth of micrometastases in the transition zone (TZ) between ablated tissue and the unaffected reference zone (RZ) in 2 different murine models. BACKGROUND Thermal destruction therapies of nonresectable colorectal liver metastases, including radiofrequency ablation (RFA), can provide tumor clearance, but local recurrences are common. METHODS Three days after intrasplenic injection of C26 colon carcinoma cells, RFA was applied to the left liver lobe. Perinecrotic microcirculation, tissue hypoxia, hypoxia inducible factor (HIF)-1alpha and HIF-2alpha, and the outgrowth of micrometastases both in the TZ and in the RZ were evaluated over time. RESULTS In 2 different animal models, the outgrowth of micrometastases in the TZ following RFA was stimulated approximately 4-fold compared to tumor growth in the RZ. Accelerated tumor growth in the TZ was associated with microcirculatory disturbances, prolonged hypoxia, and stabilization of HIF-1alpha and HIF-2alpha in the tumor cells. In addition, RFA induced the formation of new hepatic vessels that sprouted from existing sinusoids and grew into the generated necrotic lesion. Surprisingly, the accelerated tumor growth was not associated with these vessels. Treatment with 17DMAG prevented HIF-1alpha and HIF-2alpha stabilization and selectively reduced tumor growth in the TZ by approximately 40% without affecting tumor growth in sham-operated mice or in the RZ of RFA-treated mice. PTK787/ZK-222584, a nonselective Vascular Endothelial Growth Factor (VEGF)-receptor inhibitor, reduced RFA-stimulated tumor growth and tumor growth in the RZ to a similar extent. CONCLUSIONS We conclude that RFA stimulates the outgrowth of tumor cells at the lesion periphery. Angiogenesis is not the driving force behind RFA-stimulated tumor growth, but other hypoxia/HIF-activated pathways are likely to be important.
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Wang W, Li Y, Li Y, Hong A, Wang J, Lin B, Li R. NDRG3 is an androgen regulated and prostate enriched gene that promotes in vitro and in vivo prostate cancer cell growth. Int J Cancer 2008; 124:521-30. [PMID: 18975380 DOI: 10.1002/ijc.23961] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
NDRG3 belongs to the N-myc down-regulated gene (NDRG) family that contains 4 paralogs: NDRG1, -2, -3 and -4. The function of NDRG3 and its relationship to cancer has not been studied. We herein report our examination of the expression and biological roles of NDRG3 in prostate cancers. We showed that NDRG3 expression is enriched in testis and prostate using gene expression data derived from massively parallel signature sequencing from 33 different human organs. We further showed that NDRG3 is expressed in both epithelial prostate cancer cells and prostatic stromal cells at both mRNA and proteins levels. We demonstrated that NDRG1 is significantly up-regulated by androgen in LNCaP cells. Over-expression of NDRG3 in stably transfected PC-3 cells increased their growth rates and migration capabilities when compared to parental or mock empty vector transfected PC-3 cells. In addition, we found that overexpresson of NDRG3 promoted the growth of xenograft tumors in nude mice. Finally, we found that NDRG3 expression was detected in 58.6% (41/70) of prostate cancer specimens compared to 13.2% (5/38) of benign prostatic hyperplasia specimens by immunohistochemistry. We showed by microarray and by RT-PCR that NDRG3 overexpression up-regulates the expression of many angiogenic chemokines including CXCL1 (chemokine ligand 1), CXCL3 (chemokine ligand 3) and CXCL5 (chemokine ligand 5), which may increase angiogenesis of tumors. Taken together, these results demonstrate that NDRG3 is a tumor promoter, the overexpression of which may contribute to the malignant phenotype of tumors.
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Affiliation(s)
- Weiqun Wang
- Key Laboratory of Contraceptive Drugs and Devices of NPFPC, Shanghai Institute of Planned Parenthood Research, Shanghai, China
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Xu LX, Zhang A, Liu P, Chen C, Sun J, Sabados DM. Energy-based diagnostic and treatment techniques. IEEE ENGINEERING IN MEDICINE AND BIOLOGY MAGAZINE : THE QUARTERLY MAGAZINE OF THE ENGINEERING IN MEDICINE & BIOLOGY SOCIETY 2008; 27:72-77. [PMID: 18799393 DOI: 10.1109/memb.2008.923960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Lisa X Xu
- School of Life Sciences and Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People's Republic of China.
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Wong HR, Odoms K, Sakthivel B. Divergence of canonical danger signals: the genome-level expression patterns of human mononuclear cells subjected to heat shock or lipopolysaccharide. BMC Immunol 2008; 9:24. [PMID: 18510776 PMCID: PMC2430197 DOI: 10.1186/1471-2172-9-24] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/30/2008] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Peripheral blood mononuclear cells (PBMC) serve a sentinel role allowing the host to efficiently sense and adapt to the presence of danger signals. Herein we have directly compared the genome-level expression patterns (microarray) of a human PBMC model (THP-1 cells) subjected to one of two canonical danger signals, heat shock or lipopolysaccharide (LPS). RESULTS AND DISCUSSION Based on sequential expression and statistical filters, and in comparison to control cells, we found that 3,988 genes were differentially regulated in THP-1 cells subjected to LPS stress, and 2,921 genes were differentially regulated in THP-1 cells subjected to heat shock stress. Venn analyses demonstrated that the majority of differentially regulated genes (> or = 70%) were uniquely expressed in response to one of the two danger signals. Functional analyses demonstrated that the two danger signals induced expression or repression of genes corresponding to unique pathways, molecular functions, biological processes, and gene networks. In contrast, there were 184 genes that were commonly upregulated by both stress signals, and 430 genes that were commonly downregulated by both stress signals. Interestingly, the 184 commonly upregulated genes corresponded to a gene network broadly related to inflammation, and more specifically to chemokine signaling. CONCLUSION These data demonstrate that the mononuclear cell responses to the canonical stress signals, heat shock and LPS, are highly divergent. However, there is a heretofore unrecognized common pattern of gene network expression corresponding to chemokine-related biology. The data also serve as a reference database for investigators in the field of stress signaling.
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Affiliation(s)
- Hector R Wong
- Department of Pediatrics, University of Cincinnati College of Medicine, Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center and Cincinnati Children's Research Foundation, Cincinnati, Ohio, USA.
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