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Wang Y, Liu M, Zhang W, Liu H, Jin F, Mao S, Han C, Wang X. Mechanical strategies to promote vascularization for tissue engineering and regenerative medicine. BURNS & TRAUMA 2024; 12:tkae039. [PMID: 39350780 PMCID: PMC11441985 DOI: 10.1093/burnst/tkae039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 05/30/2024] [Accepted: 06/11/2024] [Indexed: 10/04/2024]
Abstract
Vascularization is a major challenge in the field of tissue engineering and regenerative medicine. Mechanical factors have been demonstrated to play a fundamental role in vasculogenesis and angiogenesis and can affect the architecture of the generated vascular network. Through the regulation of mechanical factors in engineered tissues, various mechanical strategies can be used to optimize the preformed vascular network and promote its rapid integration with host vessels. Optimization of the mechanical properties of scaffolds, including controlling scaffold stiffness, increasing surface roughness and anisotropic structure, and designing interconnected, hierarchical pore structures, is beneficial for the in vitro formation of vascular networks and the ingrowth of host blood vessels. The incorporation of hollow channels into scaffolds promotes the formation of patterned vascular networks. Dynamic stretching and perfusion can facilitate the formation and maturation of preformed vascular networks in vitro. Several indirect mechanical strategies provide sustained mechanical stimulation to engineered tissues in vivo, which further promotes the vascularization of implants within the body. Additionally, stiffness gradients, anisotropic substrates and hollow channels in scaffolds, as well as external cyclic stretch, boundary constraints and dynamic flow culture, can effectively regulate the alignment of vascular networks, thereby promoting better integration of prevascularized engineered tissues with host blood vessels. This review summarizes the influence and contribution of both scaffold-based and external stimulus-based mechanical strategies for vascularization in tissue engineering and elucidates the underlying mechanisms involved.
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Affiliation(s)
- Yiran Wang
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Meixuan Liu
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Wei Zhang
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Huan Liu
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Fang Jin
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Shulei Mao
- Department of Burns and Plastic Surgery, Quhua Hospital of Zhejiang, 62 Wenchang Road, Quhua, Quzhou 324004, China
| | - Chunmao Han
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
| | - Xingang Wang
- Department of Burns and Wound Care Center, The Second Affiliated Hospital of Zhejiang University College of Medicine, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
- The Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province, 88 Jiefang Road, Shangcheng District, Hangzhou 310009, China
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Caffaratti H, Slater B, Shaheen N, Rhone A, Calmus R, Kritikos M, Kumar S, Dlouhy B, Oya H, Griffiths T, Boes AD, Trapp N, Kaiser M, Sallet J, Banks MI, Howard MA, Zanaty M, Petkov CI. Neuromodulation with Ultrasound: Hypotheses on the Directionality of Effects and a Community Resource. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.06.14.24308829. [PMID: 38947047 PMCID: PMC11213082 DOI: 10.1101/2024.06.14.24308829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Low-intensity Transcranial Ultrasound Stimulation (TUS) is a promising non-invasive technique for deep-brain stimulation and focal neuromodulation. Research with animal models and computational modelling has raised the possibility that TUS can be biased towards enhancing or suppressing neural function. Here, we first conduct a systematic review of human TUS studies for perturbing neural function and alleviating brain disorders. We then collate a set of hypotheses on the directionality of TUS effects and conduct an initial meta-analysis on the human TUS study reported outcomes to date (n = 32 studies, 37 experiments). We find that parameters such as the duty cycle show some predictability regarding whether the targeted area's function is likely to be enhanced or suppressed. Given that human TUS sample sizes are exponentially increasing, we recognize that results can stabilize or change as further studies are reported. Therefore, we conclude by establishing an Iowa-Newcastle (inTUS) resource for the systematic reporting of TUS parameters and outcomes to support further hypothesis testing for greater precision in brain stimulation and neuromodulation with TUS.
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Affiliation(s)
- Hugo Caffaratti
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Ben Slater
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
| | - Nour Shaheen
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Ariane Rhone
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Ryan Calmus
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Michael Kritikos
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Sukhbinder Kumar
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Brian Dlouhy
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Hiroyuki Oya
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Tim Griffiths
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
| | - Aaron D Boes
- Department of Psychiatry, University of Iowa, Iowa City, IA, USA
| | - Nicholas Trapp
- Department of Psychiatry, University of Iowa, Iowa City, IA, USA
| | - Marcus Kaiser
- NIHR Biomedical Research Centre, School of Medicine, University of Nottingham, Nottingham, UK
- Rui Jin Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jérôme Sallet
- Stem Cell and Brain Research Institute, INSERM U1208, University of Lyon, Lyon, France
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Matthew I Banks
- Department of Anesthesiology, University of Wisconsin at Madison, WI, USA
| | - Matthew A Howard
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Mario Zanaty
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Christopher I Petkov
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
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Imashiro C, Jin Y, Hayama M, Yamada TG, Funahashi A, Sakaguchi K, Umezu S, Komotori J. Titanium Culture Vessel Presenting Temperature Gradation for the Thermotolerance Estimation of Cells. CYBORG AND BIONIC SYSTEMS 2023; 4:0049. [PMID: 37554432 PMCID: PMC10405790 DOI: 10.34133/cbsystems.0049] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/19/2023] [Indexed: 08/10/2023] Open
Abstract
Hyperthermia can be induced to exploit the thermal intolerance of cancer cells, which is worse than that of normal cells, as a potential noninvasive cancer treatment. To develop an effective hyperthermia treatment, thermal cytotoxicity of cells should be comprehensively investigated. However, to conduct such investigations, the culture temperature must be accurately regulated. We previously reported a culture system in which the culture temperature could be accurately regulated by employing metallic culture vessels. However, appropriate temperature conditions for hyperthermia depend on the cell species. Consequently, several experiments need to be conducted, which is a bottleneck of inducing hyperthermia. Hence, we developed a cell culture system with temperature gradation on a metallic culture surface. Michigan Cancer Foundation-7 cells and normal human dermal fibroblasts were used as cancer and normal cell models, respectively. Normal cells showed stronger thermal tolerance; this was because the novel system immediately exhibited a temperature gradation. Thus, the developed culture system can be used to investigate the optimum thermal conditions for effective hyperthermia treatment. Furthermore, as the reactions of cultured cells can be effectively assessed with the present results, further research involving the thermal stimulation of cells is possible.
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Affiliation(s)
- Chikahiro Imashiro
- Graduate School of Engineering,
The University of Tokyo, Tokyo 113-0033, Japan
- Department of Mechanical Engineering,
Keio University, Yokohama, Kanagawa 223-0061, Japan
| | - Yangyan Jin
- School of Integrated Design Engineering, Graduate School of Science and Technology,
Keio University, Yokohama, Kanagawa 223-0061, Japan
| | - Motoaki Hayama
- School of Integrated Design Engineering, Graduate School of Science and Technology,
Keio University, Yokohama, Kanagawa 223-0061, Japan
| | - Takahiro G. Yamada
- Department of Biosciences and Informatics,
Keio University, Yokohama, Kanagawa 223-0061, Japan
| | - Akira Funahashi
- Department of Biosciences and Informatics,
Keio University, Yokohama, Kanagawa 223-0061, Japan
| | - Katsuhisa Sakaguchi
- Department of Integrative Bioscience and Biomedical Engineering, Graduate School of Advanced Science and Engineering,
Waseda University, TWIns, Tokyo 162-8480, Japan
| | - Shinjiro Umezu
- Department of Integrative Bioscience and Biomedical Engineering, Graduate School of Advanced Science and Engineering,
Waseda University, TWIns, Tokyo 162-8480, Japan
- Department of Modern Mechanical Engineering,
Waseda University, Tokyo 169-8555, Japan
| | - Jun Komotori
- Department of Mechanical Engineering,
Keio University, Yokohama, Kanagawa 223-0061, Japan
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Davis CM, Ammi AY, Zhu W, Methner C, Cao Z, Giraud D, Alkayed NJ, Woltjer RL, Kaul S. Low-Intensity Ultrasound Reduces Brain Infarct Size by Upregulating Phosphorylated Endothelial Nitric Oxide in Mouse Model of Middle Cerebral Artery Occlusion. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:1091-1101. [PMID: 36739244 PMCID: PMC10050145 DOI: 10.1016/j.ultrasmedbio.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 05/11/2023]
Abstract
OBJECTIVE There have been attempts to use therapeutic ultrasound (US) for the treatment of both experimental and clinical stroke. We hypothesized that low-intensity US has direct beneficial effects on the brain independent of cerebral blood flow (CBF) during middle cerebral artery occlusion (MCAO). METHODS Three groups of mice were studied. Group I included 84 mice with MCAO undergoing US treatment/no treatment at two US frequencies (0.25 and 1.05 MHz) with three different acoustic pressures at each frequency in which infarct size (IS) was measured 24 h later. Group II included 11 mice undergoing treatment based on best US results from group I animals in which the IS/risk area (RA) ratio was measured 24 h later. Group III included 38 normal mice undergoing US treatment/no treatment for assessment of CBF, tissue metabolite and protein expression and histopathology. DISCUSSION Ultrasound at both frequencies and most acoustic pressures resulted in reduction in IS in group I animals, with the best results obtained with 0.25 MHz at 2.0 MPa: IS was reduced 4-fold in the cerebral cortex, 1.5-fold in the caudate putamen and 3.5-fold in the cerebral hemisphere compared with control. US application in group III animals elicited only a marginal increase in CBF despite a 2.6-fold increase in phosphorylated endothelial nitric oxide synthase (p-eNOS)-S1177 and a corresponding decrease in p-eNOS-T494. Histopathology revealed no evidence of hemorrhage, inflammation or necrosis. CONCLUSION Low-intensity US at specific frequencies and acoustic pressures results in marked neuroprotection in a mouse model of stroke by modulation of p-eNOS independent of its effect on CBF.
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Affiliation(s)
- Catherine M Davis
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA; Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Azzdine Y Ammi
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Wenbin Zhu
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Carmen Methner
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Zhiping Cao
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA; Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - David Giraud
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Nabil J Alkayed
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA; Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Randy L Woltjer
- Department of Pathology, Oregon Health & Science University, Portland, OR, USA
| | - Sanjiv Kaul
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA.
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Imashiro C, Mei J, Friend J, Takemura K. Quantifying cell adhesion through forces generated by acoustic streaming. ULTRASONICS SONOCHEMISTRY 2022; 90:106204. [PMID: 36257212 PMCID: PMC9583098 DOI: 10.1016/j.ultsonch.2022.106204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/01/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The strength of cell adhesion is important in understanding the cell's health and in culturing them. Quantitative measurement of cell adhesion strength is a significant challenge in bioengineering research. For this, the present study describes a system that can measure cell adhesion strength using acoustic streaming induced by Lamb waves. Cells are cultured on an ultrasound transducer using a range of preculture and incubation times with phosphate-buffered saline (PBS) just before the measurement. Acoustic streaming is then induced using several Lamb wave intensities, exposing the cells to shear flows and eventually detaching them. By relying upon a median detachment rate of 50 %, the corresponding detachment force, or force of cell adhesion, was determined to be on the order of several nN, consistent with previous reports. The stronger the induced shear flow, the more cells were detached. Further, we employed a preculture time of 8 to 24 h and a PBS incubation time of 0 to 60 min, producing cell adhesion forces that varied from 1.2 to 13 nN. Hence, the developed system can quantify cell adhesion strength over a wide range, possibly offering a fundamental tool for cell-based bioengineering.
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Affiliation(s)
- Chikahiro Imashiro
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan; Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
| | - Jiyang Mei
- Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering and Department of Surgery, School of Medicine, University of California, San Diego, CA 92093, USA
| | - James Friend
- Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering and Department of Surgery, School of Medicine, University of California, San Diego, CA 92093, USA
| | - Kenjiro Takemura
- Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Guo J, Lo WLA, Hu H, Yan L, Li L. Transcranial ultrasound stimulation applied in ischemic stroke rehabilitation: A review. Front Neurosci 2022; 16:964060. [PMID: 35937889 PMCID: PMC9355469 DOI: 10.3389/fnins.2022.964060] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/04/2022] [Indexed: 11/29/2022] Open
Abstract
Ischemic stroke is a serious medical condition that is caused by cerebral vascular occlusion and leads to neurological dysfunction. After stroke, patients suffer from long-term sensory, motor and cognitive impairment. Non-invasive neuromodulation technology has been widely studied in the field of stroke rehabilitation. Transcranial ultrasound stimulation (TUS), as a safe and non-invasive technique with deep penetration ability and a tiny focus, is an emerging technology. It can produce mechanical and thermal effects by delivering sound waves to brain tissue that can induce the production of neurotrophic factors (NFs) in the brain, and reduce cell apoptosis and the inflammatory response. TUS, which involves application of an acoustic wave, can also dissolve blood clots and be used to deliver therapeutic drugs to the ischemic region. TUS has great potential in the treatment of ischemic stroke. Future advancements in imaging and parameter optimization will improve the safety and efficacy of this technology in the treatment of ischemic stroke.
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Affiliation(s)
- Jiecheng Guo
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an, China
| | - Wai Leung Ambrose Lo
- Department of Rehabilitation Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Huijing Hu
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an, China
| | - Li Yan
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an, China
- *Correspondence: Li Yan,
| | - Le Li
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an, China
- Le Li,
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Injectable conductive and angiogenic hydrogels for chronic diabetic wound treatment. J Control Release 2022; 344:249-260. [DOI: 10.1016/j.jconrel.2022.03.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/01/2022] [Accepted: 03/07/2022] [Indexed: 12/26/2022]
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Imashiro C, Takeshita H, Morikura T, Miyata S, Takemura K, Komotori J. Development of accurate temperature regulation culture system with metallic culture vessel demonstrates different thermal cytotoxicity in cancer and normal cells. Sci Rep 2021; 11:21466. [PMID: 34728686 PMCID: PMC8563756 DOI: 10.1038/s41598-021-00908-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 10/18/2021] [Indexed: 12/24/2022] Open
Abstract
Hyperthermia has been studied as a noninvasive cancer treatment. Cancer cells show stronger thermal cytotoxicity than normal cells, which is exploited in hyperthermia. However, the absence of methods evaluating the thermal cytotoxicity in cells prevents the development of hyperthermia. To investigate the thermal cytotoxicity, culture temperature should be regulated. We, thus, developed a culture system regulating culture temperature immediately and accurately by employing metallic culture vessels. Michigan Cancer Foundation-7 cells and normal human dermal fibroblasts were used for models of cancer and normal cells. The findings showed cancer cells showed stronger thermal cytotoxicity than normal cells, which is quantitatively different from previous reports. This difference might be due to regulated culture temperature. The thermal stimulus condition (43 °C/30 min) was, further, focused for assays. The mRNA expression involving apoptosis changed dramatically in cancer cells, indicating the strong apoptotic trend. In contrast, the mRNA expression of heat shock protein (HSP) of normal cells upon the thermal stimulus was stronger than cancer cells. Furthermore, exclusively in normal cells, HSP localization to nucleus was confirmed. These movement of HSP confer thermotolerance to cells, which is consistent with the different thermal cytotoxicity between cancer and normal cells. In summary, our developed system can be used to develop hyperthermia treatment.
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Affiliation(s)
- Chikahiro Imashiro
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, 162-8666, Japan.
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan.
| | - Haruka Takeshita
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan
| | - Takashi Morikura
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan
| | - Shogo Miyata
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan
| | - Kenjiro Takemura
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan
| | - Jun Komotori
- Department of Mechanical Engineering, Keio University, Yokohama, 223-8522, Japan.
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