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Nguyen KT, Bui MP, Le TA, Kim SJ, Kim HY, Yoon J, Park JO, Kim J. Magnetic particle image scanner based on asymmetric core-filled electromagnetic actuator. Comput Biol Med 2024; 169:107864. [PMID: 38171260 DOI: 10.1016/j.compbiomed.2023.107864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/14/2023] [Accepted: 12/17/2023] [Indexed: 01/05/2024]
Abstract
Monitoring the distribution of magnetic nanoparticles (MNPs) in the vascular system is an important task for the advancement of precision therapeutics and drug delivery. Despite active targeting using active motilities, it is required to visualize the position and concentration of carriers that reach the target, to promote the development of this technology. In this work, a feasibility study is presented on a tomographic scanner that allows monitoring of the injected carriers quantitatively in a relatively short interval. The device is based on a small-animal-scale asymmetric magnetic platform integrated with magnetic particle imaging technology. An optimized isotropic field-free region (FFR) generation method using a magnetic manipulation system (MMS) is derived and numerically investigated. The in-vitro and in-vivo tracking performances are demonstrated with a high position accuracy of approximately 1 mm. A newly proposed tracking method was developed, specialized in vascular system, with quick scanning time (about 1s). In this paper, the primary function of the proposed system is to track magnetic particles using a magnetic manipulation system. Through this, proposed method enables the conventional magnetic actuation systems to upgrade the functionalities of both manipulation and localization of magnetic objects.
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Affiliation(s)
- Kim Tien Nguyen
- Korea Institute of Medical Microrobotics, Gwangju, 61011, South Korea
| | - Minh Phu Bui
- School of Integrated Technology, Gwangju Institute of Science and Technology (GIST), Gwangju, South Korea
| | - Tuan-Anh Le
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Scottsdale, AZ, 85259, USA
| | - Seok Jae Kim
- Korea Institute of Medical Microrobotics, Gwangju, 61011, South Korea
| | - Ho Young Kim
- Department of Nanobiomedical Science, Dankook University, Chungnam, 31116, South Korea
| | - Jungwon Yoon
- School of Integrated Technology, Gwangju Institute of Science and Technology (GIST), Gwangju, South Korea.
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju, 61011, South Korea.
| | - Jayoung Kim
- Korea Institute of Medical Microrobotics, Gwangju, 61011, South Korea.
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2
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Cao HX, Nguyen VD, Park JO, Choi E, Kang B. Acoustic Actuators for the Manipulation of Micro/Nanorobots: State-of-the-Art and Future Outlooks. Micromachines (Basel) 2024; 15:186. [PMID: 38398914 PMCID: PMC10890471 DOI: 10.3390/mi15020186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024]
Abstract
Compared to other actuating methods, acoustic actuators offer the distinctive capability of the contactless manipulation of small objects, such as microscale and nanoscale robots. Furthermore, they have the ability to penetrate the skin, allowing for the trapping and manipulation of micro/nanorobots that carry therapeutic agents in diverse media. In this review, we summarize the current progress in using acoustic actuators for the manipulation of micro/nanorobots used in various biomedical applications. First, we introduce the actuating method of using acoustic waves to manipulate objects, including the principle of operation and different types of acoustic actuators that are usually employed. Then, applications involving manipulating different types of devices are reviewed, including bubble-based microrobots, bubble-free robots, biohybrid microrobots, and nanorobots. Finally, we discuss the challenges and future perspectives for the development of the field.
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Affiliation(s)
- Hiep Xuan Cao
- Robot Research Initiative, Chonnam National University, Gwangju 61186, Republic of Korea; (H.X.C.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea;
| | - Van Du Nguyen
- Robot Research Initiative, Chonnam National University, Gwangju 61186, Republic of Korea; (H.X.C.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea;
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea;
| | - Eunpyo Choi
- Robot Research Initiative, Chonnam National University, Gwangju 61186, Republic of Korea; (H.X.C.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Byungjeon Kang
- Robot Research Initiative, Chonnam National University, Gwangju 61186, Republic of Korea; (H.X.C.); (E.C.)
- Graduate School of Data Science, Chonnam National University, Gwangju 61186, Republic of Korea
- College of AI Convergence, Chonnam National University, Gwangju 61186, Republic of Korea
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Sharif S, Jung D, Cao HX, Park JO, Kang B, Choi E. Ultrasonic Manipulation of Hydrodynamically Driven Microparticles in Vessel Bifurcation: Simulation, Optimization, Experimental Validation, and Potential for Targeted Drug Delivery. Micromachines (Basel) 2023; 15:13. [PMID: 38276841 PMCID: PMC10819303 DOI: 10.3390/mi15010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/27/2024]
Abstract
Microrobots driven by multiple external power sources have emerged as promising tools for targeted drug and stem cell delivery in tissue regeneration. However, navigating and imaging these devices within a complex colloidal vascular system at a clinical scale is challenging. Ultrasonic actuators have gained interest in the field of non-contact manipulation of micromachines due to their label-free biocompatible nature and safe operation history. This research presents experimentally validated simulation results of ultrasonic actuation using a novel ultrasonic transducer array with a hemispherical arrangement that generates active traveling waves with phase modulation. Blood flow is used as a carrier force while the direction and path are controlled by blocking undesirable paths using a highly focused acoustic field. In the experiments, the microrobot cluster was able to follow a predefined trajectory and reach the target. The microrobot size, maximum radiation pressure, and focus position were optimized for certain blood flow conditions. The outcomes suggest that this acoustic manipulation module has potential applications in targeted tumor therapy.
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Affiliation(s)
- Saqib Sharif
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea;
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
| | - Daewon Jung
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
| | - Hiep Xuan Cao
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
- College of AI Convergence, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
- College of AI Convergence, Chonnam National University, Gwangju 61186, Republic of Korea
- Graduate School of Data Science, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea;
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea; (D.J.); (H.X.C.); (J.-O.P.)
- College of AI Convergence, Chonnam National University, Gwangju 61186, Republic of Korea
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4
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Nguyen VD, Park JO, Choi E. Macrophage-Based Microrobots for Anticancer Therapy: Recent Progress and Future Perspectives. Biomimetics (Basel) 2023; 8:553. [PMID: 37999194 PMCID: PMC10669771 DOI: 10.3390/biomimetics8070553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 11/25/2023] Open
Abstract
Macrophages, which are part of the mononuclear phagocytic system, possess sensory receptors that enable them to target cancer cells. In addition, they are able to engulf large amounts of particles through phagocytosis, suggesting a potential "Trojan horse" drug delivery approach to tumors by facilitating the engulfment of drug-hidden particles by macrophages. Recent research has focused on the development of macrophage-based microrobots for anticancer therapy, showing promising results and potential for clinical applications. In this review, we summarize the recent development of macrophage-based microrobot research for anticancer therapy. First, we discuss the types of macrophage cells used in the development of these microrobots, the common payloads they carry, and various targeting strategies utilized to guide the microrobots to cancer sites, such as biological, chemical, acoustic, and magnetic actuations. Subsequently, we analyze the applications of these microrobots in different cancer treatment modalities, including photothermal therapy, chemotherapy, immunotherapy, and various synergistic combination therapies. Finally, we present future outlooks for the development of macrophage-based microrobots.
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Affiliation(s)
- Van Du Nguyen
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Eunpyo Choi
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
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Darmawan BA, Park JO, Go G, Choi E. Four-Dimensional-Printed Microrobots and Their Applications: A Review. Micromachines (Basel) 2023; 14:1607. [PMID: 37630143 PMCID: PMC10456732 DOI: 10.3390/mi14081607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/11/2023] [Accepted: 08/13/2023] [Indexed: 08/27/2023]
Abstract
Owing to their small size, microrobots have many potential applications. In addition, four-dimensional (4D) printing facilitates reversible shape transformation over time or upon the application of stimuli. By combining the concept of microrobots and 4D printing, it may be possible to realize more sophisticated next-generation microrobot designs that can be actuated by applying various stimuli, and also demonstrates profound implications for various applications, including drug delivery, cells delivery, soft robotics, object release and others. Herein, recent advances in 4D-printed microrobots are reviewed, including strategies for facilitating shape transformations, diverse types of external stimuli, and medical and nonmedical applications of microrobots. Finally, to conclude the paper, the challenges and the prospects of 4D-printed microrobots are highlighted.
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Affiliation(s)
- Bobby Aditya Darmawan
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea; (B.A.D.); (J.-O.P.)
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea; (B.A.D.); (J.-O.P.)
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea; (B.A.D.); (J.-O.P.)
- Department of Mechanical Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea; (B.A.D.); (J.-O.P.)
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
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Kim IY, Kim HY, Song HW, Park JO, Choi YH, Choi E. Functional enhancement of exosomes derived from NK cells by IL-15 and IL-21 synergy against hepatocellular carcinoma cells: The cytotoxicity and apoptosis in vitro study. Heliyon 2023; 9:e16962. [PMID: 37484408 PMCID: PMC10361042 DOI: 10.1016/j.heliyon.2023.e16962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 06/02/2023] [Accepted: 06/02/2023] [Indexed: 07/25/2023] Open
Abstract
Exosomes are released by various cells, including natural killer (NK) cells and transport signaling molecules for the intercellular communication. Hepatocellular carcinoma (HCC), also known as primary liver cancer, is often inoperable and difficult to accurate diagnosis. Notably, the prognosis and underlying mechanisms of HCC are not fully understood. Exosomes-derived NK cells (NK-exos) express unique cytotoxic proteins with a killing ability in tumors and can easily penetrate tumor tissues to improve their targeting ability. NK cell functions, inducing cellular cytotoxicity are modulated by cytokines such as interleukin (IL)-15 and IL-21. However, the mechanisms and effects of cytokines-stimulated NK-exos for the treatment of liver cancer, including HCC, are not well known. In this study, we aimed to investigate the synergistic anti-tumor effects of NK-exos stimulated with IL-15 and IL-21 (NK-exosIL-15/21) in Hep3B cells. Our findings revealed that NK-exosIL-15/21 expressed cytotoxic proteins (perforin and granzyme B) and contained typical exosome markers (CD9 and CD63) within the size range of 100-150 nm. Moreover, we demonstrated that NK-exosIL-15/21 induced the enhancement of cytotoxicity and apoptotic activity in Hep3B cells by activating the specific pro-apoptotic proteins (Bax, cleaved caspase 3, cleaved PARP, perforin, and granzyme B) and inhibiting the anti-apoptotic protein (Bcl-2). In summary, our results suggest that NK-exosIL-15/21 regulate strong anti-tumor effects of HCC cells, by increasing the cytotoxicity and apoptosis through the activation of specific cytotoxic molecules.
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Affiliation(s)
- In-Young Kim
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Ho Yong Kim
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Hyeong-woo Song
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - You Hee Choi
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
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Lee J, Song HW, Nguyen KT, Kim S, Nan M, Park JO, Go G, Choi E. Magnetically Actuated Microscaffold with Controllable Magnetization and Morphology for Regeneration of Osteochondral Tissue. Micromachines (Basel) 2023; 14:434. [PMID: 36838133 PMCID: PMC9959313 DOI: 10.3390/mi14020434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Magnetic microscaffolds capable of targeted cell delivery have been developed for tissue regeneration. However, the microscaffolds developed so far with similar morphologies have limitations for applications to osteochondral disease, which requires simultaneous treatment of the cartilage and subchondral bone. This study proposes magnetically actuated microscaffolds tailored to the cartilage and subchondral bone for osteochondral tissue regeneration, named magnetically actuated microscaffolds for cartilage regeneration (MAM-CR) and for subchondral bone regeneration (MAM-SBR). The morphologies of the microscaffolds were controlled using a double emulsion and microfluidic flow. In addition, due to their different sizes, MAM-CR and MAM-SBR have different magnetizations because of the different amounts of magnetic nanoparticles attached to their surfaces. In terms of biocompatibility, both microscaffolds were shown to grow cells without toxicity as potential cell carriers. In magnetic actuation tests of the microscaffolds, the relatively larger MAM-SBR moved faster than the MAM-CR under the same magnetic field strength. In a feasibility test, the magnetic targeting of the microscaffolds in 3D knee cartilage phantoms showed that the MAM-SBR and MAM-CR were sequentially moved to the target sites. Thus, the proposed magnetically actuated microscaffolds provide noninvasive treatment for osteochondral tissue disease.
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Affiliation(s)
- Junhyeok Lee
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Hyeong-Woo Song
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Kim Tien Nguyen
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Seokjae Kim
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Minghui Nan
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
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Nan M, Darmawan BA, Go G, Zheng S, Lee J, Kim S, Lee T, Choi E, Park JO, Bang D. Wearable Localized Surface Plasmon Resonance-Based Biosensor with Highly Sensitive and Direct Detection of Cortisol in Human Sweat. Biosensors (Basel) 2023; 13:184. [PMID: 36831950 PMCID: PMC9953546 DOI: 10.3390/bios13020184] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/11/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Wearable biosensors have the potential for developing individualized health evaluation and detection systems owing to their ability to provide continuous real-time physiological data. Among various wearable biosensors, localized surface plasmon resonance (LSPR)-based wearable sensors can be versatile in various practical applications owing to their sensitive interactions with specific analytes. Understanding and analyzing endocrine responses to stress is particularly crucial for evaluating human performance, diagnosing stress-related diseases, and monitoring mental health, as stress takes a serious toll on physiological health and psychological well-being. Cortisol is an essential biomarker of stress because of the close relationship between cortisol concentration in the human body and stress level. In this study, a flexible LSPR biosensor was manufactured to detect cortisol levels in the human body by depositing gold nanoparticle (AuNP) layers on a 3-aminopropyltriethoxysilane (APTES)-functionalized poly (dimethylsiloxane) (PDMS) substrate. Subsequently, an aptamer was immobilized on the surface of the LSPR substrate, enabling highly sensitive and selective cortisol capture owing to its specific cortisol recognition. The biosensor exhibited excellent detection ability in cortisol solutions of various concentrations ranging from 0.1 to 1000 nM with a detection limit of 0.1 nM. The flexible LSPR biosensor also demonstrated good stability under various mechanical deformations. Furthermore, the cortisol levels of the flexible LSPR biosensor were also measured in the human epidermis before and after exercise as well as in the morning and afternoon. Our biosensors, which combine easily manufactured flexible sensors with sensitive cortisol-detecting molecules to measure human stress levels, could be versatile candidates for human-friendly products.
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Affiliation(s)
- Minghui Nan
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Bobby Aditya Darmawan
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Shirong Zheng
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Junhyeok Lee
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Seokjae Kim
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Taeksu Lee
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- College of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
| | - Doyeon Bang
- Korea Institute of Medical Microrobotics, 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Republic of Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- College of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
- Graduate School of Data Science, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
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Cao HX, Jung D, Lee HS, Nguyen VD, Choi E, Kim CS, Park JO, Kang B. Fabrication, Acoustic Characterization and Phase Reference-Based Calibration Method for a Single-Sided Multi-Channel Ultrasonic Actuator. Micromachines (Basel) 2022; 13:2182. [PMID: 36557481 PMCID: PMC9782305 DOI: 10.3390/mi13122182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
The ultrasonic actuator can be used in medical applications because it is label-free, biocompatible, and has a demonstrated history of safe operation. Therefore, there is an increasing interest in using an ultrasonic actuator in the non-contact manipulation of micromachines in various materials and sizes for therapeutic applications. This research aims to design, fabricate, and characterize a single-sided transducer array with 56 channels operating at 500 kHz, which provide benefits in the penetration of tissue. The fabricated transducer is calibrated using a phase reference calibration method to reduce position misalignment and phase discrepancies caused by acoustic interaction. The acoustic fields generated by the transducer array are measured in a 300 mm × 300 mm × 300 mm container filled with de-ionized water. A hydrophone is used to measure the far field in each transducer array element, and the 3D holographic pattern is analyzed based on the scanned acoustic pressure fields. Next, the phase reference calibration is applied to each transducer in the ultrasonic actuator. As a result, the homogeneity of the acoustic pressure fields surrounding the foci area is improved, and the maximum pressure is also increased in the twin trap. Finally, we demonstrate the capability to trap and manipulate micromachines with acoustic power by generating a twin trap using both optical camera and ultrasound imaging systems in a water medium. This work not only provides a comprehensive study on acoustic actuators but also inspires the next generation to use acoustics in medical applications.
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Affiliation(s)
- Hiep Xuan Cao
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
| | - Daewon Jung
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
| | - Han-Sol Lee
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Republic of Korea
- College of AI Convergence, Chonnam National University, Gwangju 61186, Republic of Korea
- Graduate School of Data Science, Chonnam National University, Gwangju 61186, Republic of Korea
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10
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Nguyen VD, Kim HY, Choi YH, Park JO, Choi E. Tumor-derived extracellular vesicles for the active targeting and effective treatment of colorectal tumors in vivo. Drug Deliv 2022; 29:2621-2631. [PMID: 35941835 PMCID: PMC9367655 DOI: 10.1080/10717544.2022.2105444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Colorectal cancer remains one of the main causes of cancer-related deaths worldwide. Although numerous nanomedicine formulations have been developed to tackle the disease, their low selectivity still limits effective therapeutic outcomes. In this study, we isolated extracellular vesicles (EVs) from CT26 colorectal cancer cells and 4T1 murine mammary carcinoma cells, loaded them with the chemotherapeutic agent (doxorubicin, DOX). Then we evaluated the cellular uptake of the extracellular vesicles both in 2D monolayer and 3D tumor spheroid setups using confocal laser scanning microscope and flow cytometry. In vivo tumor homing of the extracellular vesicles was verified on CT26 tumor bearing BALB/c mice using in vivo imaging system. Finally, in vivo therapeutic effects were evaluated and compared using the same animal models treated with five doses of EV formulations. CT26-EV-DOX exhibited excellent biocompatibility, a high drug-loading capacity, controlled drug release behavior, and a high capability for targeting colorectal cancer cells. In particular, we verified that CT26-EV-DOX could preferentially be up taken by their parent cells and could effectively target and penetrate 3D tumor spheroids resembling colorectal tumors in vivo in comparison with their 4T1 derived EV partner. Additionally, treatment of colorectal tumor-bearing BALB/c mice with of CT26-EV-DOX significantly inhibited the growth of the tumors during the treatment course. The developed CT26-EV-DOX nanoparticles may present a novel and effective strategy for the treatment of colorectal cancer.
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Affiliation(s)
- Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, Buk-gu, Gwangju, Korea.,Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Korea
| | - Ho Yong Kim
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Korea
| | - You Hee Choi
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Buk-gu, Gwangju, Korea.,Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Korea
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11
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Kim HY, Min HK, Song HW, Yoo A, Lee S, Kim KP, Park JO, Choi YH, Choi E. Delivery of human natural killer cell-derived exosomes for liver cancer therapy: an in vivo study in subcutaneous and orthotopic animal models. Drug Deliv 2022; 29:2897-2911. [PMID: 36068970 PMCID: PMC9467548 DOI: 10.1080/10717544.2022.2118898] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Exosomes are nanosized extracellular vesicles secreted by various cell types, including those of the immune system, such as natural killer (NK) cells. They play a role in intercellular communication by transporting signal molecules between the cells. Recent studies have reported that NK cell-derived exosomes (NK-exo) contain cytotoxic proteins-induced cell death. However, the characteristics and potential functions of NK-exo, especially for the liver cancer are poorly understood. In this study, we investigated the anti-tumor effects of NK-exo in the primary liver cancer, hepatocellular carcinoma (HCC), using the orthotopic and subcutaneous tumor model. We found that NK-exo expressed both typical exosomal markers (e.g. CD63, CD81, and Alix) and cytotoxic proteins (e.g. perforin, granzyme B, FasL, and TRAIL). NK-exo were selectively taken up by HCC cells (e.g. Hep3B, HepG2, and Huh 7). Interestingly, Hep3B cells induced the highest cytotoxicity compared with HepG2 and Huh7 cells, and substantially enhanced the apoptosis by NK-exo. Furthermore, we demonstrated that NK-exo inhibited the phosphorylation of serine/threonine protein kinases (e.g. AKT and ERK1/2), and enhanced the activation of specific apoptosis markers (e.g. caspase-3, -7, -8, -9, and PARP) in Hep3B cells. NK-exo also exhibit the active targeting ability and potent therapeutic effects in both orthotopic and subcutaneous HCC mouse models. Overall, these results suggest that NK-exo indicate strong anti-tumor effects in HCC, which are mediated by novel regulatory mechanisms involved in serine/threonine kinase pathway-associated cell proliferation and caspase activation pathway-associated apoptosis.
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Affiliation(s)
- Ho Yong Kim
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea
| | - Hyun-Ki Min
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea
| | - Hyeong-Woo Song
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea
| | - Ami Yoo
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea
| | - Seonmin Lee
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Songpa-Gu, Seoul, Republic of Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Songpa-Gu, Seoul, Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea.,School of Mechanical Engineering, Chonnam National University, Buk, Gwangju, Republic of Korea
| | - You Hee Choi
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, Buk-gu, Gwangju, Republic of Korea.,School of Mechanical Engineering, Chonnam National University, Buk, Gwangju, Republic of Korea
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12
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Hoang MC, Park JO, Kim J. Battery-Free Tattooing Mechanism-Based Functional Active Capsule Endoscopy. Micromachines (Basel) 2022; 13:2111. [PMID: 36557410 PMCID: PMC9786073 DOI: 10.3390/mi13122111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
This paper presents a novel tattooing capsule endoscope (TCE) for delivering a certain amount of ink to the submucosal layer of digestive tract organs. A dual-function permanent magnet is used for locomotion and injection activation. The developed capsule endoscope can move actively in 5 DOF due to the interaction between the permanent magnet and a controllable external magnetic field produced by an electromagnet actuation system. In addition, the permanent magnet is involved in a specially designed mechanism to activate a process that creates a squeezing motion to eject the liquid from the storage room to the target. The dimension of the prototype is 12.5 mm in diameter and 34.6 mm in length. The proposed TCE is tested ex vivo using a fresh porcine small-intestine segment. We were able to direct the TCE to the target and deliver the tattoo agent into the tissue. The proposed mechanism can be used for drug delivery or lesion tattooing, as well as to accelerate the realization of the functional capsule endoscope in practice.
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Affiliation(s)
| | - Jong-Oh Park
- Correspondence: (J.-O.P.); (J.K.); Tel.: +82-062-530-5262 (J.K.)
| | - Jayoung Kim
- Correspondence: (J.-O.P.); (J.K.); Tel.: +82-062-530-5262 (J.K.)
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13
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Go G, Yoo A, Nguyen KT, Nan M, Darmawan BA, Zheng S, Kang B, Kim CS, Bang D, Lee S, Kim KP, Kang SS, Shim KM, Kim SE, Bang S, Kim DH, Park JO, Choi E. Multifunctional microrobot with real-time visualization and magnetic resonance imaging for chemoembolization therapy of liver cancer. Sci Adv 2022; 8:eabq8545. [PMID: 36399561 PMCID: PMC9674283 DOI: 10.1126/sciadv.abq8545] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/30/2022] [Indexed: 05/28/2023]
Abstract
Microrobots that can be precisely guided to target lesions have been studied for in vivo medical applications. However, existing microrobots have challenges in vivo such as biocompatibility, biodegradability, actuation module, and intra- and postoperative imaging. This study reports microrobots visualized with real-time x-ray and magnetic resonance imaging (MRI) that can be magnetically guided to tumor feeding vessels for transcatheter liver chemoembolization in vivo. The microrobots, composed of a hydrogel-enveloped porous structure and magnetic nanoparticles, enable targeted delivery of therapeutic and imaging agents via magnetic guidance from the actuation module under real-time x-ray imaging. In addition, the microrobots can be tracked using MRI as postoperative imaging and then slowly degrade over time. The in vivo validation of microrobot system-mediated chemoembolization was demonstrated in a rat liver with a tumor model. The proposed microrobot provides an advanced medical robotic platform that can overcome the limitations of existing microrobots and current liver chemoembolization.
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Affiliation(s)
- Gwangjun Go
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, USA
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Ami Yoo
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
| | - Kim Tien Nguyen
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
| | - Minghui Nan
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
| | - Bobby Aditya Darmawan
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Shirong Zheng
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- College of AI Convergence, Chonnam National University, Gwangju 34931, Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Doyeon Bang
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- College of AI Convergence, Chonnam National University, Gwangju 34931, Korea
| | - Seonmin Lee
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-Gu, Seoul 05505, Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-Gu, Seoul 05505, Korea
| | - Seong Soo Kang
- Department of Veterinary Surgery, College of Veterinary Medicine and Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Kyung Mi Shim
- Department of Veterinary Surgery, College of Veterinary Medicine and Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Se Eun Kim
- Department of Veterinary Surgery, College of Veterinary Medicine and Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Seungmin Bang
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Deok-Ho Kim
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, USA
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
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14
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Zheng S, Hoang MC, Nguyen VD, Go G, Nan M, Darmawan BA, Kim S, Im SH, Lee T, Bang D, Park JO, Choi E. Microrobot with Gyroid Surface and Gold Nanostar for High Drug Loading and Near-Infrared-Triggered Chemo-Photothermal Therapy. Pharmaceutics 2022; 14:pharmaceutics14112393. [PMID: 36365211 PMCID: PMC9696578 DOI: 10.3390/pharmaceutics14112393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 10/31/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
The use of untethered microrobots for precise synergistic anticancer drug delivery and controlled release has attracted attention over the past decade. A high surface area of the microrobot is desirable to achieve greater therapeutic effect by increasing the drug load. Therefore, various nano- or microporous microrobot structures have been developed to load more drugs. However, as most porous structures are not interconnected deep inside, the drug-loading efficiency may be reduced. Here, we propose a magnetically guided helical microrobot with a Gyroid surface for high drug-loading efficiency and precise drug delivery. All spaces inside the proposed microrobot are interconnected, thereby enabling drug loading deep inside the structure. Moreover, we introduce gold nanostars on the microrobot structure for near-infrared-induced photothermal therapy and triggering drug release. The results of this study encourage further exploration of a high loading efficiency in cell-based therapeutics, such as stem cells or immune cells, for microrobot-based drug-delivery systems.
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Affiliation(s)
- Shirong Zheng
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Manh Cuong Hoang
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Van Du Nguyen
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Gwangjun Go
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Minghui Nan
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Bobby Aditya Darmawan
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Seokjae Kim
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Seung-hyun Im
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Taeksu Lee
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
- Correspondence: (T.L.); (E.C.)
| | - Doyeon Bang
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
- Graduate School of Data Science, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Department of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Robot Research Initiative, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
- Correspondence: (T.L.); (E.C.)
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15
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Cao HX, Nguyen VD, Jung D, Choi E, Kim CS, Park JO, Kang B. Acoustically Driven Cell-Based Microrobots for Targeted Tumor Therapy. Pharmaceutics 2022; 14:pharmaceutics14102143. [PMID: 36297578 PMCID: PMC9609374 DOI: 10.3390/pharmaceutics14102143] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/06/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022] Open
Abstract
Targeted drug delivery using microrobots manipulated by an external actuator has significant potential to be a practical approach for wireless delivery of therapeutic agents to the targeted tumor. This work aimed to develop a novel acoustic manipulation system and macrophage-based microrobots (Macbots) for a study in targeted tumor therapy. The Macbots containing superparamagnetic iron oxide nanoparticles (SPIONs) can serve as drug carriers. Under an acoustic field, a microrobot cluster of the Macbots is manipulated by following a predefined trajectory and can reach the target with a different contact angle. As a fundamental validation, we investigated an in vitro experiment for targeted tumor therapy. The microrobot cluster could be manipulated to any point in the 4 × 4 × 4 mm region of interest with a position error of less than 300 μm. Furthermore, the microrobot could rotate in the O-XY plane with an angle step of 45 degrees without limitation of total angle. Finally, we verified that the Macbots could penetrate a 3D tumor spheroid that mimics an in vivo solid tumor. The outcome of this study suggests that the Macbots manipulated by acoustic actuators have potential applications for targeted tumor therapy.
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Affiliation(s)
- Hiep Xuan Cao
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
| | - Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
| | - Daewon Jung
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
- College of AI Convergence, Chonnam National University, Gwangju 61186, Korea
- Graduate School of Data Science, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
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16
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Darmawan BA, Lee SB, Nan M, Nguyen VD, Park JO, Choi E. Shape-Tunable UV-Printed Solid Drugs for Personalized Medicine. Polymers (Basel) 2022; 14:polym14132714. [PMID: 35808759 PMCID: PMC9269401 DOI: 10.3390/polym14132714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/17/2022] [Accepted: 06/29/2022] [Indexed: 02/04/2023] Open
Abstract
Several recent advances have emerged in biotherapy and the development of personal drugs. However, studies exploring effective manufacturing methods of personal drugs remain limited. In this study, solid drugs based on poly(ethylene glycol)diacrylate (PEGDA) hydrogel and doxorubicin were fabricated, and their final geometry was varied through UV-light patterning. The results suggested that the final drug concentration was affected by the geometrical volume as well as the UV-light exposure time. The analysis of PEGDA showed no effect on the surrounding cells, indicating its high biocompatibility. However, with the addition of doxorubicin, it showed an excellent therapeutic effect, indicating that drugs inside the PEGDA structure could be successfully released. This approach enables personal drugs to be fabricated in a simple, fast, and uniform manner, with perfectly tuned geometry.
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Affiliation(s)
- Bobby Aditya Darmawan
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (B.A.D.); (M.N.); (V.D.N.)
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Sang Bong Lee
- THERABEST, Co., Ltd., Seocho-daero 40-gil, Seoul 06657, Korea;
| | - Minghui Nan
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (B.A.D.); (M.N.); (V.D.N.)
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (B.A.D.); (M.N.); (V.D.N.)
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
- Correspondence: (J.-O.P.); (E.C.)
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea; (B.A.D.); (M.N.); (V.D.N.)
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
- Correspondence: (J.-O.P.); (E.C.)
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17
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Park T, Choi E, Kim CS, Park JO, Hong A. A Multi-Segmented Soft Finger Using Snap-Through Instability of a Soft Valve With a Slit. IEEE Robot Autom Lett 2022. [DOI: 10.1109/lra.2022.3180037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tongil Park
- Korea Institute of Medical Microrobotics, Gwangju, South Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju, South Korea
| | - Ayoung Hong
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
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18
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Darmawan BA, Gong D, Park H, Jeong S, Go G, Kim S, Nguyen KT, Zheng S, Nan M, Nguyen VD, Bang D, Kim CS, Kim H, Park JO, Choi E. Magnetically controlled reversible shape-morphing microrobots with real-time X-ray imaging for stomach cancer applications. J Mater Chem B 2022; 10:4509-4518. [PMID: 35616358 DOI: 10.1039/d2tb00760f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Stomach cancer is a global health concern as millions of cases are reported each year. In the present study, we developed a pH-responsive microrobot with good biocompatibility, magnetic-field controlled movements, and the ability to be visualized via X-ray imaging. The microrobot consisted of composite resin and a pH-responsive layer. This microrobot was found to fold itself in high pH environments and unfold itself in low pH environments. In addition, the neodymium (NdFeB) magnetic nanoparticles present inside the composite resin provided the microrobot with an ability to be controlled by a magnetic field through an electromagnetic actuation system, and the monomeric triiodobenzoate-based particles were found to act as contrast agents for real-time X-ray imaging. The doxorubicin coating on the microrobot's surface resulted in a high cancer-cell killing effect. Finally, we demonstrated the proposed microrobot under an ex vivo environment using a pig's stomach. Thus, this approach can be a potential alternative to targeted drug carriers, especially for stomach cancer applications.
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Affiliation(s)
- Bobby Aditya Darmawan
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Dohoon Gong
- School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Hyeongyu Park
- School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Songah Jeong
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Seokjae Kim
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Kim Tien Nguyen
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea.
| | - Shirong Zheng
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Minghui Nan
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Van Du Nguyen
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Doyeon Bang
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,College of AI Convergence, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Hyungwoo Kim
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208 beon-gil, Buk-gu, Gwangju 61011, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yong-bong-ro, Buk-gu, Gwangju 61186, Korea
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Kim WY, Joung S, Park H, Park JO, Ko SY. Human-robot-robot cooperative control using positioning robot and 1-DOF traction device for robot-assisted fracture reduction system. Proc Inst Mech Eng H 2022; 236:697-710. [DOI: 10.1177/09544119221083140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
While performing musculoskeletal long bone fracture reduction surgery, assistant surgeons can often suffer from physical fatigue as they provide resistance against the tension from surrounding muscles pulling on the patient’s broken bones. These days, robotic systems are being actively developed to mitigate this physical workload by realigning and holding these fractured bones for surgeons. This has led to one consortium proposing the development of a robot-assisted fracture reduction system consisting of a 6-DOF positioning robot along with a 1-DOF traction device. With the introduction of the 1-DOF traction device, the positioning robot does not have to fight these contraction forces so can be compact improving its maneuverability and overall convenience; however, considering surgeon-robot interactions, this approach adds the requirement of controlling two different types of robots simultaneously. As such, an advanced cooperative control methodology is required to control the proposed bone fracture reduction robot system. In this paper, a human-robot-robot cooperative control (HRRCC) scheme is proposed for collaboration between the surgeon, the positioning robot, and the traction device. First, the mathematical background of this HRRCC scheme is provided. Next, we describe a series of experiments that show how the proposed scheme facilitates a reduction in the load placed on the positioning robot from strong muscular contraction forces making it possible to conduct fracture reduction procedures more safely despite the muscular forces.
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Affiliation(s)
- Woo Young Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
| | - Sanghyun Joung
- Medical Device and Robot Institute of Park, Kyungpook National University, Daegu, South Korea
| | - Hyung Park
- School of Medicine, Department of Orthopedic Surgery, Kyungpook National University, Daegu, South Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
| | - Seong Young Ko
- School of Mechanical Engineering, Chonnam National University, Gwangju, South Korea
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20
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Micheal MM, Adel A, Kim CS, Park JO, Misra S, Khalil ISM. 2D Magnetic Actuation and Localization of a Surface Milli-Roller in Low Reynolds Numbers. IEEE Robot Autom Lett 2022. [DOI: 10.1109/lra.2022.3148787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Nguyen KT, Kim HY, Park JO, Choi E, Kim CS. Tripolar Electrode Electrochemical Impedance Spectroscopy for Endoscopic Devices toward Early Colorectal Tumor Detection. ACS Sens 2022; 7:632-640. [PMID: 35147414 DOI: 10.1021/acssensors.1c02571] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Embedded sensors for endoscopy devices have been studied toward a convenient and decision-supportive methodology in colorectal cancer (CRC) diagnosis, but no device could provide direct CRC screening with in situ measurements. In this study, we proposed a millimeter-scale electrical impedance spectroscopy (EIS) device that can be integrated into a biopsy tool in endoscopy for colorectal tumor detection. A minimally invasive tripolar electrode was designed to sense the tissue impedance, and a multilayer neural network was implemented for the classification algorithm. The sensor performance was investigated in terms of sensitivity, reliability, and repeatability using dummy tissues made of agarose hydrogels at various saline concentrations. In addition, an in vivo study was conducted in mice with an implanted CT-26 colon tumor line. The results demonstrated that the prototyped EIS device and algorithm can detect the tumor tissue in suspicious lesions with high sensitivity and specificity of 87.2 and 92.5%, respectively, and a low error of 7.1%. The findings of this study are promising for in situ CRC screening and may advance the diagnostic efficacy of CRC detection during endoscopic procedures.
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Affiliation(s)
- Kim Tien Nguyen
- Korea Institute of Medical Micorobotics, Gwangju 61011, Korea
| | - Ho Yong Kim
- Korea Institute of Medical Micorobotics, Gwangju 61011, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Micorobotics, Gwangju 61011, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
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22
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Lee S, Bang D, Park JO, Choi E. Programmed Shape-Morphing Material Using Single-Layer 4D Printing System. Micromachines 2022; 13:mi13020243. [PMID: 35208367 PMCID: PMC8877839 DOI: 10.3390/mi13020243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 12/10/2022]
Abstract
The single-layer 4D printing technology that can be controllable in response to external stimuli is a tremendous challenge in many areas, including smart materials, robotics, and drug delivery systems. The single-layer 4D printing technique was enabled by light-focusing, which results in the difference of mechanical properties such as the coefficient of thermal expansion or Young’s modulus between focused and unfocused regions. However, 4D printing to the desired shape using single-layered material is challenging. In this paper, we demonstrate the programmed shape morphing by patterning both the static and shape-morphing layers using a single-layer 4D printing system. A shape-morphing layer is formulated by short-time (<3 s) illumination in UV light. Then a static layer is formulated by longer-time (>3 s) illumination in UV light. We expect this technique to lead to the development of micro-scale soft robots.
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Affiliation(s)
- Seonjin Lee
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea;
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
| | - Doyeon Bang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
- College of AI Convergence, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (D.B.); (J.-O.P.); (E.C.)
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea;
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
- Correspondence: (D.B.); (J.-O.P.); (E.C.)
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea;
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea
- Correspondence: (D.B.); (J.-O.P.); (E.C.)
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23
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Song HW, Lee HS, Kim SJ, Kim HY, Choi YH, Kang B, Kim CS, Park JO, Choi E. Sonazoid-Conjugated Natural Killer Cells for Tumor Therapy and Real-Time Visualization by Ultrasound Imaging. Pharmaceutics 2021; 13:pharmaceutics13101689. [PMID: 34683982 PMCID: PMC8537855 DOI: 10.3390/pharmaceutics13101689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 01/08/2023] Open
Abstract
Various cell therapy strategies, including chimeric antigen receptor-expressing T or natural killer (NK) cells and cell-mediated drug delivery, have been developed for tumor eradication. However, the efficiency of these strategies against solid tumors remains unclear. We hypothesized that real-time control and visualization of therapeutic cells, such as NK cells, would improve their therapeutic efficacy against solid tumors. In this study, we engineered Sonazoid microbubble-conjugated NK (NK_Sona) cells and demonstrated that they were detectable by ultrasound imaging in real-time and maintained their functions. The Sonazoid microbubbles on the cell membrane did not affect the cytotoxicity and viability of the NK cells in vitro. Additionally, the NK_Sona cells could be visualized by ultrasound imaging and inhibited tumor growth in vivo. Taken together, our findings demonstrate the feasibility of this new approach in the use of therapeutic cells, such as NK cells, against solid tumors.
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Affiliation(s)
- Hyeong-Woo Song
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
| | - Han-Sol Lee
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- School of Mechanical Engineering, Chonnam National University, Gwangju, 61186, Korea
| | - Seok-Jae Kim
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- School of Mechanical Engineering, Chonnam National University, Gwangju, 61186, Korea
| | - Ho Yong Kim
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
| | - You Hee Choi
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- College of AI Convergence, Chonnam National University, Gwangju 61186, Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- School of Mechanical Engineering, Chonnam National University, Gwangju, 61186, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- School of Mechanical Engineering, Chonnam National University, Gwangju, 61186, Korea
- Correspondence: (J.-O.P.); (E.C.)
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (H.-W.S.); (H.-S.L.); (S.-J.K.); (H.Y.K.); (Y.H.C.); (B.K.); (C.-S.K.)
- School of Mechanical Engineering, Chonnam National University, Gwangju, 61186, Korea
- Correspondence: (J.-O.P.); (E.C.)
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Nguyen KT, Go G, Zhen J, Hoang MC, Kang B, Choi E, Park JO, Kim CS. Locomotion and disaggregation control of paramagnetic nanoclusters using wireless electromagnetic fields for enhanced targeted drug delivery. Sci Rep 2021; 11:15122. [PMID: 34302003 PMCID: PMC8302636 DOI: 10.1038/s41598-021-94446-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/12/2021] [Indexed: 11/09/2022] Open
Abstract
Magnetic nanorobots (MNRs) based on paramagnetic nanoparticles/nanoclusters for the targeted therapeutics of anticancer drugs have been highlighted for their efficiency potential. Controlling the locomotion of the MNRs is a key challenge for effective delivery to the target legions. Here, we present a method for controlling paramagnetic nanoclusters through enhanced tumbling and disaggregation motions with a combination of rotating field and gradient field generated by external electromagnets. The mechanism is carried out via an electromagnetic actuation system capable of generating MNR motions with five degrees of freedom in a spherical workspace without singularity. The nanocluster swarm structures can successfully pass through channels to the target region where they can disaggregate. The results show significantly faster response and higher targeting rate by using rotating magnetic and gradient fields. The mean velocities of the enhanced tumbling motion are twice those of the conventional tumbling motion and approximately 130% higher than the gradient pulling motion. The effects of each fundamental factor on the locomotion are investigated for further MNR applications. The locomotion speed of the MNR could be predicted by the proposed mathematical model and agrees well with experimental results. The high access rate and disaggregation performance insights the potentials for targeted drug delivery application.
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Affiliation(s)
- Kim Tien Nguyen
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea
| | - Jin Zhen
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, Henan, China
| | - Manh Cuong Hoang
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea.,School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Korea
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea.,College of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea.,School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea.
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, Korea. .,School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, Korea.
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25
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Nguyen KT, Kim SJ, Min HK, Hoang MC, Go G, Kang B, Kim J, Choi E, Hong A, Park JO, Kim CS. Guide-Wired Helical Microrobot for Percutaneous Revascularization in Chronic Total Occlusion in-Vivo Validation. IEEE Trans Biomed Eng 2021; 68:2490-2498. [PMID: 33351745 DOI: 10.1109/tbme.2020.3046513] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE For the revascularization in small vessels such as coronary arteries, we present a guide-wired helical microrobot mimicking the corkscrew motion for mechanical atherectomy that enables autonomous therapeutics and minimizing the radiation exposure to clinicians. METHODS The microrobot is fabricated with a spherical joint and a guidewire. A previously developed external electromagnetic manipulation system capable of high power and frequency is incorporated and an autonomous guidance motion control including driving and steering is implemented in the prototype. We tested the validity of our approach in animal experiments under clinical settings. For the in vivo test, artificial thrombus was fabricated and placed in a small vessel and atherectomy procedures were conducted. RESULTS The devised approach enables us to navigate the helical robot to the target area and successfully unclog the thrombosis in rat models in vivo. CONCLUSION This technology overcomes several limitations associated with a small vessel environment and promises to advance medical microrobotics for real clinical applications while achieving intact operation and minimizing radiation exposures to clinicians. SIGNIFICANCE Advanced microrobot based on multi-discipline technology could be validated in vivo for the first time and that may foster the microrobot application at clinical sites.
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Nguyen VD, Min HK, Kim HY, Han J, Choi YH, Kim CS, Park JO, Choi E. Primary Macrophage-Based Microrobots: An Effective Tumor Therapy In Vivo by Dual-Targeting Function and Near-Infrared-Triggered Drug Release. ACS Nano 2021; 15:8492-8506. [PMID: 33973786 DOI: 10.1021/acsnano.1c00114] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Macrophages (MΦs) have the capability to sense chemotactic cues and to home tumors, therefore presenting a great approach to engineer these cells to deliver therapeutic agents to treat diseases. However, current cell-based drug delivery systems usually use commercial cell lines that may elicit an immune response when injected into a host animal. Furthermore, premature off-target drug release also remains an enormous challenge. Here, we isolated and differentiated MΦs from the spleens of BALB/c mice and developed dual-targeting MΦ-based microrobots, regulated by chemotaxis and an external magnetic field, and had a precise spatiotemporal controlled drug release at the tumor sites in response to the NIR laser irradiation. These microrobots were prepared by coloading citric acid (CA)-coated superparamagnetic nanoparticles (MNPs) and doxorubicin (DOX)-containing thermosensitive nanoliposomes (TSLPs) into the MΦs. CA-MNPs promoted a magnetic targeting function to the microrobots and also permitted photothermal heating in response to the NIR irradiation, triggering drug release from TSLPs. In vitro experiments showed that the microrobots effectively infiltrated tumors in 3D breast cancer tumor spheroids, particularly in the presence of the magnetic field, and effectively induced tumor cell death, further enhanced by the NIR laser irradiation. In vivo experiments confirmed that the application of the magnetic field and NIR laser could markedly inhibit the growth of tumors with a subtherapeutic dose of DOX and a single injection of the microrobots. In summary, the study proposes a strategy for the effective anticancer treatment using the developed microrobots.
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Affiliation(s)
- Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Hyun-Ki Min
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Ho Yong Kim
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Jiwon Han
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - You Hee Choi
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
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Sharif S, Nguyen KT, Bang D, Park JO, Choi E. Optimization of Field-Free Point Position, Gradient Field and Ferromagnetic Polymer Ratio for Enhanced Navigation of Magnetically Controlled Polymer-Based Microrobots in Blood Vessel. Micromachines (Basel) 2021; 12:mi12040424. [PMID: 33924499 PMCID: PMC8070347 DOI: 10.3390/mi12040424] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/08/2021] [Accepted: 04/08/2021] [Indexed: 11/26/2022]
Abstract
Microscale and nanoscale robots, frequently referred to as future cargo systems for targeted drug delivery, can effectively convert magnetic energy into locomotion. However, navigating and imaging them within a complex colloidal vascular system at a clinical scale is exigent. Hence, a more precise and enhanced hybrid control navigation and imaging system is necessary. Magnetic particle imaging (MPI) has been successfully applied to visualize the ensemble of superparamagnetic nanoparticles (MNPs) with high temporal sensitivity. MPI uses the concept of field-free point (FFP) mechanism in the principal magnetic field. The gradient magnetic field (|∇B|) of MPI scanners can generate sufficient magnetic force in MNPs; hence, it has been recently used to navigate nanosized particles and micron-sized swimmers. In this article, we present a simulation analysis of the optimized navigation of an ensemble of microsized polymer MNP-based drug carriers in blood vessels. Initially, an ideal two-dimensional FFP case is employed for the basic optimization of the FFP position to achieve efficient navigation. Thereafter, a nine-coil electromagnetic actuation simulation system is developed to generate and manipulate the FFP position and |∇B|. Under certain vessel and fluid conditions, the particle trajectories of different ferromagnetic polymer ratios and |∇B| were compared to optimize the FFP position.
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Affiliation(s)
- Saqib Sharif
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (S.S.); (K.T.N.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
| | - Kim Tien Nguyen
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (S.S.); (K.T.N.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
| | - Doyeon Bang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
- College of AI Convergence, Chonnam National University, Gwangju 61186, Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (S.S.); (K.T.N.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
- Correspondence: (J.-O.P.); (E.C.)
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (S.S.); (K.T.N.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
- Correspondence: (J.-O.P.); (E.C.)
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Zheng S, Park T, Hoang MC, Go G, Kim CS, Park JO, Choi E, Hong A. Ascidian-Inspired Soft Robots That Can Crawl, Tumble, and Pick-and-Place Objects. IEEE Robot Autom Lett 2021. [DOI: 10.1109/lra.2021.3059621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Cao HX, Jung D, Lee HS, Go G, Nan M, Choi E, Kim CS, Park JO, Kang B. Micromotor Manipulation Using Ultrasonic Active Traveling Waves. Micromachines (Basel) 2021; 12:mi12020192. [PMID: 33668512 PMCID: PMC7918005 DOI: 10.3390/mi12020192] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/05/2021] [Accepted: 02/11/2021] [Indexed: 02/01/2023]
Abstract
The ability to manipulate therapeutic agents in fluids is of interest to improve the efficiency of targeted drug delivery. Ultrasonic manipulation has great potential in the field of therapeutic applications as it can trap and manipulate micro-scale objects. Recently, several methods of ultrasonic manipulation have been studied through standing wave, traveling wave, and acoustic streaming. Among them, the traveling wave based ultrasonic manipulation is showing more advantage for in vivo environments. In this paper, we present a novel ultrasonic transducer (UT) array with a hemispherical arrangement that generates active traveling waves with phase modulation to manipulate a micromotor in water. The feasibility of the method could be demonstrated by in vitro and ex vivo experiments conducted using a UT array with 16 transducers operating at 1 MHz. The phase of each transducer was controlled independently for generating a twin trap and manipulation of a micromotor in 3D space. This study shows that the ultrasonic manipulation device using active traveling waves is a versatile tool that can be used for precise manipulation of a micromotor inserted in a human body and targeted for drug delivery.
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Affiliation(s)
- Hiep Xuan Cao
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Daewon Jung
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
| | - Han-Sol Lee
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Minghui Nan
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 506813, Korea; (H.X.C.); (D.J.); (H.-S.L.); (G.G.); (M.N.); (E.C.)
- Robotics Engineering Convergence, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (C.-S.K.); (J.-O.P.); (B.K.)
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Park HS, Kang B, Chon HJ, Im HS, Lee CK, Kim I, Kang MJ, Hwang JE, Bae WK, Cheon J, Park JO, Hong JY, Kang JH, Kim JH, Lim SH, Kim JW, Kim JW, Yoo C, Choi HJ. Liposomal irinotecan plus fluorouracil/leucovorin versus FOLFIRINOX as the second-line chemotherapy for patients with metastatic pancreatic cancer: a multicenter retrospective study of the Korean Cancer Study Group (KCSG). ESMO Open 2021; 6:100049. [PMID: 33578192 PMCID: PMC7878976 DOI: 10.1016/j.esmoop.2021.100049] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 12/16/2022] Open
Abstract
Background There is no clear consensus on the recommended second-line treatment for patients with metastatic pancreatic cancer who have disease progression following gemcitabine-based therapy. We retrospectively evaluated the clinical outcomes of liposomal irinotecan (nal-IRI) plus fluorouracil/leucovorin (FL) and FOLFIRINOX (fluorouracil, leucovorin, irinotecan, and oxaliplatin) in patients who had failed on the first-line gemcitabine-based therapy. Patients and methods From January 2015 to August 2019, 378 patients with MPC who had received nal-IRI/FL (n = 104) or FOLFIRINOX (n = 274) as second-line treatment across 11 institutions were included in this retrospective study. Results There were no significant differences in baseline characteristics between groups, except age and first-line regimens. With a median follow-up of 6 months, the median progression-free survival (PFS) was 3.7 months with nal-IRI/FL versus 4.6 months with FOLFIRINOX (P = 0.44). Median overall survival (OS) was 7.7 months with nal-IRI/FL versus 9.7 months with FOLFRINOX (P = 0.13). There was no significant difference in PFS and OS between the two regimens in the univariate and multivariate analyses. The subgroup analysis revealed that younger age (<70 years) was associated with better OS with FOLFIRINOX. In contrast, older age (≥70 years) was associated with better survival outcomes with nal-IRI/FL. Adverse events were manageable with both regimens; however, the incidence of grade 3 or higher neutropenia and peripheral neuropathy was higher in patients treated with FOLFIRINOX than with nal-IRI/FL. Conclusions Second-line nal-IRI/FL and FOLFIRINOX showed similar effectiveness outcomes after progression following first-line gemcitabine-based therapy. Age could be the determining factor for choosing the appropriate second-line therapy. This multicenter retrospective study investigated nal-IRI/FL and FOLFIRINOX outcomes after gemcitabine-based therapy. We found no significant differences in outcome between nal-IRI/FL and FOLFIRINOX treatment. Both regimens were well tolerated; however, neutropenia and peripheral neuropathy were more frequent with FOLFIRINOX. Age (cut-off, 70 years) showed differential efficacy between chemotherapy regimens.
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Affiliation(s)
- H S Park
- Division of Medical Oncology, Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Seoul, Korea
| | - B Kang
- Medical Oncology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - H J Chon
- Medical Oncology, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - H-S Im
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - C-K Lee
- Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea
| | - I Kim
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - M J Kang
- Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - J E Hwang
- Division of Hematology-Oncology, Department of Internal Medicine, Chonnam National University Medical School and Hwasun Hospital, Gwangju, Korea
| | - W K Bae
- Division of Hematology-Oncology, Department of Internal Medicine, Chonnam National University Medical School and Hwasun Hospital, Gwangju, Korea
| | - J Cheon
- Department of Hematology and Oncology, Ulsan University Hospital, Ulsan University College of Medicine, Ulsan, Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea
| | - J Y Hong
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea
| | - J H Kang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - J H Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S H Lim
- Division of Hematology-Oncology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - J W Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - J-W Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - C Yoo
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
| | - H J Choi
- Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea.
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Go G, Yoo A, Song HW, Min HK, Zheng S, Nguyen KT, Kim S, Kang B, Hong A, Kim CS, Park JO, Choi E. Multifunctional Biodegradable Microrobot with Programmable Morphology for Biomedical Applications. ACS Nano 2021; 15:1059-1076. [PMID: 33290042 DOI: 10.1021/acsnano.0c07954] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We described a magnetic chitosan microscaffold tailored for applications requiring high biocompatibility, biodegradability, and monitoring by real-time imaging. Such magnetic microscaffolds exhibit adjustable pores and sizes depending on the target application and provide various functions such as magnetic actuation and enhanced cell adhesion using biomaterial-based magnetic particles. Subsequently, we fabricated the magnetic chitosan microscaffolds with optimized shape and pore properties to specific target diseases. As a versatile tool, the capability of the developed microscaffold was demonstrated through in vitro laboratory tasks and in vivo therapeutic applications for liver cancer therapy and knee cartilage regeneration. We anticipate that the optimal design and fabrication of the presented microscaffold will advance the technology of biopolymer-based microscaffolds and micro/nanorobots.
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Affiliation(s)
- Gwangjun Go
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Ami Yoo
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
| | - Hyeong-Woo Song
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
| | - Hyun-Ki Min
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
| | - Shirong Zheng
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Kim Tien Nguyen
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
| | - Seokjae Kim
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- College of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Ayoung Hong
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- College of AI Convergence, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics (KIMIRo), 43-26 Cheomdangwagi-ro, Buk-gu, Gwangju, 61011, Korea
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Korea
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Park SH, Lim DH, Sohn TS, Lee J, Zang DY, Kim ST, Kang JH, Oh SY, Hwang IG, Ji JH, Shin DB, Yu JI, Kim KM, An JY, Choi MG, Lee JH, Kim S, Hong JY, Park JO, Park YS, Lim HY, Bae JM, Kang WK. A randomized phase III trial comparing adjuvant single-agent S1, S-1 with oxaliplatin, and postoperative chemoradiation with S-1 and oxaliplatin in patients with node-positive gastric cancer after D2 resection: the ARTIST 2 trial ☆. Ann Oncol 2020; 32:368-374. [PMID: 33278599 DOI: 10.1016/j.annonc.2020.11.017] [Citation(s) in RCA: 123] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/22/2020] [Accepted: 11/23/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Adjuvant chemotherapy and chemoradiotherapy are some of the standards of care for gastric cancer (GC). The Adjuvant chemoRadioTherapy In Stomach Tumors (ARTIST) 2 trial compares two adjuvant chemotherapy regimens and chemoradiotherapy in patients with D2-resected, stage II or III, node-positive GC. PATIENTS AND METHODS The ARTIST 2 compared, in a 1:1:1 ratio, three adjuvant regimens: oral S-1 (40-60 mg twice daily 4 weeks on/2 weeks off) for 1 year, S-1 (2 weeks on/1 week off) plus oxaliplatin 130 mg/m2 every 3 weeks (SOX) for 6 months, and SOX plus chemoradiotherapy 45 Gy (SOXRT). Randomization was stratified according to surgery type (total or subtotal gastrectomy), pathologic stage (II or III), and Lauren histologic classification (diffuse or intestinal/mixed). The primary endpoint was disease-free survival (DFS) at 3 years; a reduction of 33% in the hazard ratio (HR) for DFS with SOX or SOXRT, when compared with S-1, was considered clinically meaningful. The trial is registered at clinicaltrials.gov (NCT0176146). RESULTS A total of 546 patients were recruited between February 2013 and January 2018 with 182, 181, and 183 patients in the S-1, SOX, and SOXRT arms, respectively. Median follow-up period was 47 months, with 178 DFS events observed. Estimated 3-year DFS rates were 64.8%, 74.3%, and 72.8% in the S-1, SOX, and SOXRT arms, respectively. HR for DFS in the control arm (S-1) was shorter than that in the SOX and SOXRT arms: S-1 versus SOX, 0.692 (P = 0.042) and S-1 versus SOXRT, 0.724 (P = 0.074). No difference in DFS was found between SOX and SOXRT (HR 0.971; P = 0.879). Adverse events were as anticipated in each arm, and were generally well-tolerated and manageable. CONCLUSIONS In patients with curatively D2-resected, stage II/III, node-positive GC, adjuvant SOX or SOXRT was effective in prolonging DFS, when compared with S-1 monotherapy. The addition of radiotherapy to SOX did not significantly reduce the rate of recurrence after D2 gastrectomy.
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Affiliation(s)
- S H Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D H Lim
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - T S Sohn
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D Y Zang
- Division of Hematology-Oncology, Department of Internal Medicine, Hallym University Medical Center, Hallym University College of Medicine, Anyang-si, Gyeonggi-do, Korea
| | - S T Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J H Kang
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - S Y Oh
- Department of Hematology-Oncology, Dong-A University, Busan, Korea
| | - I G Hwang
- Department of Internal Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - J H Ji
- Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - D B Shin
- Division of Hematology and Oncology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea
| | - J I Yu
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K-M Kim
- Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Y An
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - M G Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J H Lee
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Y Hong
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y S Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Y Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J M Bae
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
| | - W K Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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Kim MC, Kim ES, Park JO, Choi E, Kim CS. Robotic Localization Based on Planar Cable Robot and Hall Sensor Array Applied to Magnetic Capsule Endoscope. Sensors (Basel) 2020; 20:s20205728. [PMID: 33050155 PMCID: PMC7601872 DOI: 10.3390/s20205728] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/11/2022]
Abstract
Recently an active locomotive capsule endoscope (CE) for diagnosis and treatment in the digestive system has been widely studied. However, real-time localization to achieve precise feedback control and record suspicious positioning in the intestine is still challenging owing to the limitation of capsule size, relatively large diagnostic volume, and compatibility of other devices in clinical site. To address this issue, we present a novel robotic localization sensing methodology based on the kinematics of a planar cable driven parallel robot (CDPR) and measurements of the quasistatic magnetic field of a Hall effect sensor (HES) array. The arrangement of HES and the Levenberg-Marquardt (LM) algorithm are applied to estimate the position of the permanent magnet (PM) in the CE, and the planar CDPR is incorporated to follow the PM in the CE. By tracking control of the planar CDPR, the position of PM in any arbitrary position can be obtained through robot forward kinematics with respect to the global coordinates at the bedside. The experimental results show that the root mean square error (RMSE) for the estimated position value of PM was less than 1.13 mm in the X, Y, and Z directions and less than 1.14° in the θ and φ orientation, where the sensing space could be extended to ±70 mm for the given 34 × 34 mm2 HES array and the average moving distance in the Z-direction is 40 ± 2.42 mm. The proposed method of the robotic sensing with HES and CDPR may advance the sensing space expansion technology by utilizing the provided single sensor module of limited sensible volume.
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Affiliation(s)
- Min-Cheol Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (M.-C.K.); (J.-O.P.); (E.C.)
| | - Eui-Sun Kim
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (M.-C.K.); (J.-O.P.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (M.-C.K.); (J.-O.P.); (E.C.)
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (M.-C.K.); (J.-O.P.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea;
- Correspondence:
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Lee SB, Lee HW, Darmawan BA, Lee IK, Cho SJ, Chin J, Kim SK, Park JO, Kim KS, Lee SW, Lee J, Jeon YH. NIR dye-loaded mesoporous silica nanoparticles for a multifunctional theranostic platform: Visualization of tumor and ischemic lesions, and performance of photothermal therapy. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.03.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lee K, Go G, Yoo A, Kang B, Choi E, Park JO, Kim CS. Wearable Fixation Device for a Magnetically Controllable Therapeutic Agent Carrier: Application to Cartilage Repair. Pharmaceutics 2020; 12:E593. [PMID: 32604748 PMCID: PMC7355457 DOI: 10.3390/pharmaceutics12060593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 11/17/2022] Open
Abstract
Recently, significant research efforts have been devoted toward the development of magnetically controllable drug delivery systems, however, drug fixation after targeting remains a challenge hindering long-term therapeutic efficacy. To overcome this issue, we present a wearable therapeutic fixation device for fixing magnetically controllable therapeutic agent carriers (MCTACs) at defect sites and its application to cartilage repair using stem cell therapeutics. The developed device comprises an array of permanent magnets based on the Halbach array principle and a wearable band capable of wrapping the target body. The design of the permanent magnet array, in terms of the number of magnets and array configuration, was determined through univariate search optimization and 3D simulation. The device was fabricated for a given rat model and yielded a strong magnetic flux density (exceeding 40 mT) in the region of interest that was capable of fixing the MCTAC at the desired defect site. Through in-vitro and in-vivo experiments, we successfully demonstrated that MCTACs, both a stem cell spheroid and a micro-scaffold for cartilage repair, could be immobilized at defect sites. This research is expected to advance precise drug delivery technology based on MCTACs, enabling subject-specific routine life therapeutics. Further studies involving the proposed wearable fixation device will be conducted considering prognostics under actual clinical settings.
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Affiliation(s)
- Kyungmin Lee
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (K.L.); (G.G.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Gwangjun Go
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (K.L.); (G.G.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Ami Yoo
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (K.L.); (G.G.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (K.L.); (G.G.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea; (K.L.); (G.G.); (E.C.)
- Korea Institute of Medical Microrobotics, Gwangju 61011, Korea; (A.Y.); (B.K.)
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Nguyen VD, Min HK, Kim DH, Kim CS, Han J, Park JO, Choi E. Macrophage-Mediated Delivery of Multifunctional Nanotherapeutics for Synergistic Chemo-Photothermal Therapy of Solid Tumors. ACS Appl Mater Interfaces 2020; 12:10130-10141. [PMID: 32041404 DOI: 10.1021/acsami.9b23632] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Although great efforts have been undertaken to develop a nanoparticle-based drug delivery system (DDS) for the treatment of solid tumors, the therapeutic outcomes are still limited. Immune cells, which possess an intrinsic ability to phagocytose nanoparticles and are recruited by tumors, can be exploited to deliver nanotherapeutics deep inside the tumors. Photothermal therapy using near-infrared light is a promising noninvasive approach for solid tumor ablation, especially when combined with chemotherapy. In this study, we design and evaluate a macrophage-based, multiple nanotherapeutics DDS, involving the phagocytosis by macrophages of both small-sized gold nanorods and anticancer drug-containing nanoliposomes. The aim is to treat solid tumors, utilizing the tumor-infiltrating properties of macrophages with synergistic photothermal-chemotherapy. Using a 3D cancer spheroid as an in vitro solid tumor model, we show that tumor penetration and coverage of the nanoparticles are both markedly enhanced when the macrophages are used. In addition, in vivo experiments involving both local and systemic administrations in breast tumor-bearing mice demonstrate that the proposed DDS can effectively target and kill the tumors, especially when the synergistic therapy is used. Consequently, this immune cell-based theranostic strategy may represent a potentially important advancement in the treatment of solid tumors.
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Affiliation(s)
- Van Du Nguyen
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Hyun-Ki Min
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Deok-Ho Kim
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21205, United States
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Jiwon Han
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
- Korea Institute of Medical Microrobotics, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Korea
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Go G, Jeong SG, Yoo A, Han J, Kang B, Kim S, Nguyen KT, Jin Z, Kim CS, Seo YR, Kang JY, Na JY, Song EK, Jeong Y, Seon JK, Park JO, Choi E. Human adipose–derived mesenchymal stem cell–based medical microrobot system for knee cartilage regeneration in vivo. Sci Robot 2020; 5:5/38/eaay6626. [DOI: 10.1126/scirobotics.aay6626] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/17/2019] [Indexed: 12/21/2022]
Abstract
Targeted cell delivery by a magnetically actuated microrobot with a porous structure is a promising technique to enhance the low targeting efficiency of mesenchymal stem cell (MSC) in tissue regeneration. However, the relevant research performed to date is only in its proof-of-concept stage. To use the microrobot in a clinical stage, biocompatibility and biodegradation materials should be considered in the microrobot, and its efficacy needs to be verified using an in vivo model. In this study, we propose a human adipose–derived MSC–based medical microrobot system for knee cartilage regeneration and present an in vivo trial to verify the efficacy of the microrobot using the cartilage defect model. The microrobot system consists of a microrobot body capable of supporting MSCs, an electromagnetic actuation system for three-dimensional targeting of the microrobot, and a magnet for fixation of the microrobot to the damaged cartilage. Each component was designed and fabricated considering the accessibility of the patient and medical staff, as well as clinical safety. The efficacy of the microrobot system was then assessed in the cartilage defect model of rabbit knee with the aim to obtain clinical trial approval.
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Hoang MC, Choi E, Kang B, Park JO, Kim CS. A Miniaturized Capsule Endoscope Equipped a Marking Module for Intestinal Tumor Localization. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2019:3712-3715. [PMID: 31946681 DOI: 10.1109/embc.2019.8856868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study introduces a miniaturized capsule endoscope equipped with a marking module for intestinal tumor or lesion localization. The design concept is based on an active wireless capsule endoscope platform that is manipulated by an external electromagnetic actuation (EMA) system. The magnetic response of a permanent magnet inside the capsule is designed to have flexible movement in viscous environment of bowel. This magnet is also utilized to activate tattooing process by triggering a gas-generated chemical reaction. Once approaching to a target region, gradient magnetic field from EMA system is induced to push magnet down, releasing water to dry chemical powder mixture. Then the gas pressure increases and pushes the piston move to inject ink into target point. During traveling in digestive organs, injection needle is stowed inside the capsule to avoid damage to the organs. The whole procedure is manipulated by EMA system, the injection consumes no internal battery and is observable through capsule's camera which provides clinician vision. Basic tests were conducted to evaluate the performance of proposed robotic capsule. The success of creating a black visible bled from serosa of intestine proves the feasibility and potential of the design. This study could be an alternative for traditional tattooing endoscopy and motivate other research groups for further development of functional wireless capsule endoscope.
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Jin Z, Nguyen KT, Go G, Kang B, Min HK, Kim SJ, Kim Y, Li H, Kim CS, Lee S, Park S, Kim KP, Huh KM, Song J, Park JO, Choi E. Multifunctional Nanorobot System for Active Therapeutic Delivery and Synergistic Chemo-photothermal Therapy. Nano Lett 2019; 19:8550-8564. [PMID: 31694378 DOI: 10.1021/acs.nanolett.9b03051] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Nanorobots are safe and exhibit powerful functionalities, including delivery, therapy, and diagnosis. Therefore, they are in high demand for the development of new cancer therapies. Although many studies have contributed to the progressive development of the nanorobot system for anticancer drug delivery, these systems still face some critical limitations, such as potentially toxic materials in the nanorobots, unreasonable sizes for passive targeting, and the lack of several essential functions of the nanorobot for anticancer drug delivery including sensing, active targeting, controlling drug release, and sufficient drug loading capacity. Here, we developed a multifunctional nanorobot system capable of precise magnetic control, sufficient drug loading for chemotherapy, light-triggered controlled drug release, light absorption for photothermal therapy, enhanced magnetic resonance imaging, and tumor sensing. The developed nanorobot system exhibits an in vitro synergetic antitumor effect of photothermal therapy and chemotherapy and outstanding tumor-targeting efficiency in both in vitro and in vivo environments. The results of this study encourage further explorations of an efficient active drug delivery system for cancer treatment and the development of nanorobot systems for other biomedical applications.
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Affiliation(s)
- Zhen Jin
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Kim Tien Nguyen
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Gwangjun Go
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Byungjeon Kang
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
| | - Hyun-Ki Min
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
| | - Seok-Jae Kim
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
| | - Yun Kim
- Department of Mechanical Engineering , Hanbat National University , Deongmyeong-dong, Yuseong-gu, Daejeon 34158 , Republic of Korea
| | - Hao Li
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
| | - Chang-Sei Kim
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Seonmin Lee
- Department of Oncology , Asan Medical Center, University of Ulsan College of Medicine , 88, Olympic-ro 43-gil , Songpa-Gu, Seoul 05505 , Republic of Korea
| | - Sukho Park
- Department of Robotics Engineering , Daegu Gyeongbuk Institute of Science and Technology (DGIST) , Daegu 42988 , Republic of Korea
| | - Kyu-Pyo Kim
- Department of Oncology , Asan Medical Center, University of Ulsan College of Medicine , 88, Olympic-ro 43-gil , Songpa-Gu, Seoul 05505 , Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering , Chungnam National University , 99 Daehak-ro , Yuseong-gu, Daejeon 34134 , Republic of Korea
| | - Jihwan Song
- Department of Mechanical Engineering , Hanbat National University , Deongmyeong-dong, Yuseong-gu, Daejeon 34158 , Republic of Korea
| | - Jong-Oh Park
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Eunpyo Choi
- Korea Institute of Medical Microrobotics , 43-26 Cheomdangwagi-ro , Buk-gu, Gwangju 61011 , Republic of Korea
- School of Mechanical Engineering , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
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Hammel P, Kindler HL, Reni M, Van Cutsem E, Macarulla T, Hall MJ, Park JO, Hochhauser D, Arnold D, Oh DY, Reinacher-Schick A, Tortora G, Algül H, O'Reilly EM, McGuinness D, Cui KY, Joo S, Yoo HK, Patel N, Golan T. Health-related quality of life in patients with a germline BRCA mutation and metastatic pancreatic cancer receiving maintenance olaparib. Ann Oncol 2019; 30:1959-1968. [PMID: 31562758 PMCID: PMC6938600 DOI: 10.1093/annonc/mdz406] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Patients with metastatic pancreatic cancer often have a detriment in health-related quality of life (HRQoL). In the randomized, double-blind, phase III POLO trial progression-free survival was significantly longer with maintenance olaparib, a poly(ADP-ribose) polymerase inhibitor, than placebo in patients with a germline BRCA1 and/or BRCA2 mutation (gBRCAm) and metastatic pancreatic cancer whose disease had not progressed during first-line platinum-based chemotherapy. The prespecified HRQoL evaluation is reported here. PATIENTS AND METHODS Patients were randomized to receive maintenance olaparib (300 mg b.i.d.; tablets) or placebo. HRQoL was assessed using the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire Core 30-item module at baseline, every 4 weeks until disease progression, at discontinuation, and 30 days after last dose. Scores ranged from 0 to 100; a ≥10-point change or difference between arms was considered clinically meaningful. Adjusted mean change from baseline was analysed using a mixed model for repeated measures. Time to sustained clinically meaningful deterioration (TSCMD) was analysed using a log-rank test. RESULTS Of 154 randomized patients, 89 of 92 olaparib-arm and 58 of 62 placebo-arm patients were included in HRQoL analyses. The adjusted mean change in Global Health Status (GHS) score from baseline was <10 points in both arms and there was no significant between-group difference [-2.47; 95% confidence interval (CI) -7.27, 2.33; P = 0.31]. Analysis of physical functioning scores showed a significant between-group difference (-4.45 points; 95% CI -8.75, -0.16; P = 0.04). There was no difference in TSCMD for olaparib versus placebo for GHS [P = 0.25; hazard ratio (HR) 0.72; 95% CI 0.41, 1.27] or physical functioning (P = 0.32; HR 1.38; 95% CI 0.73, 2.63). CONCLUSIONS HRQoL was preserved with maintenance olaparib treatment with no clinically meaningful difference compared with placebo. These results support the observed efficacy benefit of maintenance olaparib in patients with a gBRCAm and metastatic pancreatic cancer. CLINCALTRIALS.GOV NUMBER NCT02184195.
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Affiliation(s)
- P Hammel
- Department of Digestive Oncology, Hôpital Beaujon (AP-HP), Clichy, and University Paris VII, Paris, France.
| | - H L Kindler
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, USA
| | - M Reni
- Department of Oncology, IRCCS Ospedale San Raffaele Scientific Institute, Milan, Italy
| | - E Van Cutsem
- Division of Digestive Oncology, University Hospitals Gasthuisberg and KU Leuven, Leuven, Belgium
| | - T Macarulla
- Department of Medical Oncology, Vall d'Hebron University Hospital and Vall d'Hebron Institute of Oncology, Barcelona, Spain
| | - M J Hall
- Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, USA
| | - J O Park
- Division of Hematology-Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - D Hochhauser
- Department of Oncology, University College London Cancer Institute, London, UK
| | - D Arnold
- Department of Oncology, Asklepios Tumorzentrum Hamburg Asklepios Klinik Altona, Hamburg, Germany
| | - D-Y Oh
- Department of Internal Medicine, Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - A Reinacher-Schick
- Department of Hematology, Oncology and Palliative Care, St. Josef-Hospital, Ruhr University Bochum, Bochum, Germany
| | - G Tortora
- Department of Medicine, Section of Medical Oncology, Azienda Ospedaliera Universitaria Integrata Verona, Verona and Fondazione Policlinico Universitario Gemelli IRCCS, Rome, Italy
| | - H Algül
- Second Department of Internal Medicine, Klinikum rechts der Isar, Comprehensive Cancer Center Munich-TUM and Department of Internal Medicine II, Technische Universität München, Munich, Germany
| | - E M O'Reilly
- Gastrointestinal Oncology Service, Memorial Sloan Kettering Cancer Center, New York, USA
| | | | - K Y Cui
- AstraZeneca, Gaithersburg, USA
| | - S Joo
- Merck & Co., Inc., Kenilworth, USA
| | | | - N Patel
- AstraZeneca, Gaithersburg, USA
| | - T Golan
- The Oncology Institute, Sheba Medical Center, Tel Aviv, Israel
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Kim ST, Banks KC, Pectasides E, Kim SY, Kim K, Lanman RB, Talasaz A, An J, Choi MG, Lee JH, Sohn TS, Bae JM, Kim S, Park SH, Park JO, Park YS, Lim HY, Kim NKD, Park W, Lee H, Bass AJ, Kim K, Kang WK, Lee J. Impact of genomic alterations on lapatinib treatment outcome and cell-free genomic landscape during HER2 therapy in HER2+ gastric cancer patients. Ann Oncol 2019; 29:1037-1048. [PMID: 29409051 PMCID: PMC5913644 DOI: 10.1093/annonc/mdy034] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background To identify predictive markers for responders in lapatinib-treated patients and to demonstrate molecular changes during lapatinib treatment via cell-free genomics. Patients and methods We prospectively evaluated the efficacy of combining lapatinib with capecitabine and oxaliplatin as first line neoadjuvant therapy in patients with previously untreated, HER2-overexpressing advanced gastric cancer. A parallel biomarker study was conducted by simultaneously performing immunohistochemistry and next-generation sequencing (NGS) with tumor and blood samples. Results Complete response was confirmed in 7/32 patients (21.8%), 2 of whom received radical surgery with pathologic-confirmed complete response. Fifteen partial responses (46.8%) were observed, resulting in a 68.6% overall response rate. NGS of the 16 tumor specimens demonstrated that the most common co-occurring copy number alteration was CCNE1 amplification, which was present in 40% of HER2+ tumors. The relationship between CCNE1 amplification and lack of response to HER2-targeted therapy trended toward statistical significance (66.7% of non-responders versus 22.2% of responders harbored CCNE1 amplification; P = 0.08). Patients with high level ERBB2 amplification by NGS were more likely to respond to therapy, compared with patients with low level ERBB2 amplification (P = 0.02). Analysis of cfDNA showed that detectable ERBB2 copy number amplification in plasma was predictive to the response (100%, response rate) and changes in plasma-detected genomic alterations were associated with lapatinib sensitivity and/or resistance. The follow-up cfDNA genomics at disease progression demonstrated that there are emergences of other genomic aberrations such as MYC, EGFR, FGFR2 and MET amplifications. Conclusions The present study showed that HER2+ GC patients respond differently according to concomitant genomic aberrations beyond ERBB2, high ERBB2 amplification by NGS or cfDNA can be a positive predictor for patient selection, and tumor genomic alterations change significantly during targeted agent therapy.
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Affiliation(s)
- S T Kim
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K C Banks
- Department of Medical Affair, Guardant Health, Dana-Farber Cancer Institute, Boston, USA
| | - E Pectasides
- Division of Molecular and Cellular Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - S Y Kim
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K Kim
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - R B Lanman
- Department of Medical Affair, Guardant Health, Dana-Farber Cancer Institute, Boston, USA
| | - A Talasaz
- Department of Medical Affair, Guardant Health, Dana-Farber Cancer Institute, Boston, USA
| | - J An
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - M G Choi
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - J H Lee
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - T S Sohn
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - J M Bae
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - S Kim
- Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Surgery, Samsung Medical Center, Seoul, Korea
| | - S H Park
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J O Park
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y S Park
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Y Lim
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - N K D Kim
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea
| | - W Park
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea
| | - H Lee
- Sungkyunkwan University School of Medicine, Seoul, Korea; Division of Gastroenterolog, Department of Medicine, Samsung Medical Center, Seoul, Korea
| | - A J Bass
- Division of Molecular and Cellular Oncology, Dana-Farber Cancer Institute, Boston, USA
| | - K Kim
- Pathology and Translational Genomics, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - W K Kang
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Lee
- Division of Hematology-Oncolog, Department of Medicine, Samsung Medical Center, Seoul, Korea; Sungkyunkwan University School of Medicine, Seoul, Korea.
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Bak JH, Hwang SW, Yoon J, Park JH, Park JO. Collision-free path planning of cable-driven parallel robots in cluttered environments. INTEL SERV ROBOT 2019. [DOI: 10.1007/s11370-019-00278-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Kim ST, Kang JH, Lee J, Lee HW, Oh SY, Jang JS, Lee MA, Sohn BS, Yoon SY, Choi HJ, Hong JH, Kim MJ, Kim S, Park YS, Park JO, Lim HY. Capecitabine plus oxaliplatin versus gemcitabine plus oxaliplatin as first-line therapy for advanced biliary tract cancers: a multicenter, open-label, randomized, phase III, noninferiority trial. Ann Oncol 2019; 30:788-795. [PMID: 30785198 DOI: 10.1093/annonc/mdz058] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Capecitabine plus oxaliplatin (XELOX) has shown modest activity and tolerable toxicity in a phase II trial for biliary tract cancers (BTCs). Meanwhile, gemcitabine plus oxaliplatin (GEMOX) has been the reference arm in recent phase II and III trials for BTCs. We aimed to investigate the efficacy of XELOX versus GEMOX as first-line therapy for advanced BCTs. PATIENTS AND METHODS In this open-label, randomized, phase III, noninferiority trial, we randomly selected patients with metastatic BCTs to receive GEMOX (gemcitabine 1000 mg/m2 on days 1 and 8, and oxaliplatin 100 mg/m2 on day 1) or XELOX (capecitabine 1000 mg/m2, twice daily, on days 1-14 and oxaliplatin 130 mg/m2 on day 1) as first-line treatment, given every 3 weeks, totaling eight cycles. The primary end point was to prove the noninferiority of XELOX to GEMOX in terms of 6-month progression-free survival (PFS) rate. RESULTS In total, 114 patients randomly received GEMOX and 108 randomly received XELOX. The median PFS was 5.3 months for the GEMOX group and 5.8 months for the XELOX group. The 6-month PFS rate was 44.5% for the GEMOX group and 46.7% for the XELOX group. The 95% confidence interval of the 6-month PFS rate difference between both groups was -12% to 16%, meeting the criteria for noninferiority of XELOX to GEMOX. There was no difference in objective response (P=0.171) and median overall survival (P=0.131) between both groups. The most common grade three to four adverse events were neutropenia and thrombocytopenia. No patient died of treatment-related causes. The XELOX group had significantly lower frequencies of hospital visits than the GEMOX group (P<0.001). CONCLUSION XELOX showed significant noninferiority to GEMOX in terms of 6-month PFS rate. Thus, XELOX could be an alternative first-line treatment of BCTs. TRIAL REGISTRATION This study was registered in ClinicalTrials.gov (number NCT01470443).
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Affiliation(s)
- S T Kim
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - J H Kang
- Division of Hemato-oncology, Department of Medicine, Gyeongsang National University Hospital, Jinju
| | - J Lee
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - H W Lee
- Division of Hemato-oncology, Department of Medicine, Ajou University School of Medicine, Suwon
| | - S Y Oh
- Division of Hemato-oncology, Department of Medicine, Dong-A University School of Medicine, Busan
| | - J S Jang
- Division of Hemato-oncology, Department of Medicine, Chung-Ang University College of Medicine, Seoul
| | - M A Lee
- Division of Hemato-oncology, Department of Medicine, Seoul St Mary's Hospital, Catholic University, Seoul
| | - B S Sohn
- Division of Hemato-oncology, Department of Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul
| | - S Y Yoon
- Division of Hemato-oncology, Department of Medicine, Konkuk University Medical Center, Seoul
| | - H J Choi
- Division of Hemato-oncology, Department of Medicine, Yonsei University College of Medicine, Seoul
| | - J H Hong
- Division of Hemato-oncology, Department of Medicine, Incheon St Mary's Hospital, Catholic University, Incheon
| | - M-J Kim
- Statistics and Data Center, Research Institute for Future Medicine, Samsung Medical Center, Seoul, South Korea
| | - S Kim
- Statistics and Data Center, Research Institute for Future Medicine, Samsung Medical Center, Seoul, South Korea
| | - Y S Park
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - J O Park
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul.
| | - H Y Lim
- Division of Hemato-oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul.
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Du Nguyen V, Le VH, Zheng S, Han J, Park JO. Preparation of tumor targeting cell-based microrobots carrying NIR light sensitive therapeutics manipulated by electromagnetic actuating system and Chemotaxis. J Micro-Bio Robot 2018. [DOI: 10.1007/s12213-018-0110-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Jin X, Jung J, Ko SY, Choi E, Park JO, Kim CS. Geometric Parameter Calibration for a Cable-Driven Parallel Robot Based on a Single One-Dimensional Laser Distance Sensor Measurement and Experimental Modeling. Sensors (Basel) 2018; 18:s18072392. [PMID: 30041466 PMCID: PMC6068707 DOI: 10.3390/s18072392] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/18/2018] [Accepted: 07/20/2018] [Indexed: 11/16/2022]
Abstract
A cable-driven parallel robot has benefits of wide workspace, high payload, and high dynamic response owing to its light cable actuator utilization. For wide workspace applications, in particular, the body frame becomes large to cover the wide workspace that causes robot kinematic errors resulting from geometric uncertainty. However, appropriate sensors as well as inexpensive and easy calibration methods to measure the actual robot kinematic parameters are not currently available. Hence, we present a calibration sensor device and an auto-calibration methodology for the over-constrained cable-driven parallel robots using one-dimension laser distance sensors attached to the robot end-effector, to overcome the robot geometric uncertainty and to implement precise robot control. A novel calibration workflow with five phases-preparation, modeling, measuring, identification, and adjustment-is proposed. The proposed calibration algorithms cover the cable-driven parallel robot kinematics, as well as uncertainty modeling such as cable elongation and pulley kinematics. We performed extensive simulations and experiments to verify the performance of the suggested method using the MINI cable robot. The experimental results show that the kinematic parameters can be identified correctly with 0.92 mm accuracy, and the robot position control accuracy is increased by 58%. Finally, we verified that the developed calibration sensor devices and the calibration methodology are applicable to the massive-size cable-driven parallel robot system.
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Affiliation(s)
- XueJun Jin
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.
| | - Jinwoo Jung
- Robot Research Initiative, Chonnam National University, Gwangju 61186, Korea.
| | - Seong Young Ko
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.
| | - Eunpyo Choi
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.
| | - Jong-Oh Park
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.
| | - Chang-Sei Kim
- Department of Mechanical Engineering, Chonnam National University, Gwangju 61186, Korea.
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Nguyen KT, Go G, Choi E, Kang B, Park JO, Kim CS. A Guide-Wired Helical Microrobot for Mechanical Thrombectomy: A Feasibility Study. Annu Int Conf IEEE Eng Med Biol Soc 2018; 2018:1494-1497. [PMID: 30440675 DOI: 10.1109/embc.2018.8512455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this paper, we present a novel guide-wired helical microrobot for mechanical thrombectomy in cardiovascular system, especially for calcified thrombus therapeutics. We designed and fabricated a prototype of the helical shape microrobot equipped with a freely rotatable spherical joint connected to a catheter guidewire, that enables drilling capability to remove calcified objects in vascular. The guidewire helps supporting and maneuvering the microrobot against blood flow during thrombus removal procedure. In addition to the microrobot, an enhanced electromagnetic navigation system (ENS) is implemented to utilize high frequency operation based on resonant effect, which enables powerful drilling force of the microrobot. The in-vitro experimental results illustrate that the suggested method could successfully enhance the locomotion and the drilling force of the helical microrobot that would be sufficient for future mechanical thrombectomy application in cardiovascular therapeutics.
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Zheng S, Han J, Jin Z, Kim CS, Park S, Kim KP, Park JO, Choi E. Dual tumor-targeted multifunctional magnetic hyaluronic acid micelles for enhanced MR imaging and combined photothermal-chemotherapy. Colloids Surf B Biointerfaces 2018; 164:424-435. [PMID: 29433060 DOI: 10.1016/j.colsurfb.2018.02.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/30/2018] [Accepted: 02/03/2018] [Indexed: 10/18/2022]
Abstract
Multifunctional polymeric micelles were developed as a promising dual tumor-targeted drug delivery platform for magnetic resonance (MR) imaging and combined photothermal-chemotherapy. HA-C16 copolymers were synthesized via peptide formation process with subsequent co-encapsulation of therapeutic agent docetaxel (DTX) and superparamagnetic iron oxide nanoparticles (SPIONs) to form the multifunctional micelles. The micelles exhibited uniform nanosize and remarkable colloidal stability in aqueous solution. The sustained drug release behavior from HA micelles was observed over the test period. Moreover, the specific targeting capability based on CD44 recptor-mediated endocytosis and the enhanced targeting efficacy by in presence of external magnetic field were investigated. The clustered SPIONs within micelles exerted excellent contrast effect with high r2 relaxivity in MR phantom test. Furthermore, the multifunctional micelles could readily convert light to heat to hyperthermia temperature upon near infrared light irradition and induce photothermal ablation to breast cancer cells. The combined photothermal therapy with DTX-mediated chemotherapy of the developed multifunctional polymeric micells could generate a synergistic therapeutic effect. Based on these findings, the resulting multifunctional micelles may provide high potential for multimodality theragnosis of cancer.
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Affiliation(s)
- Shaohui Zheng
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Jiwon Han
- Medical Microrobot Center (MRC) and Robot Research Initiative (RRI), Chonnam National University, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea.
| | - Zhen Jin
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Chang-Sei Kim
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea; Medical Microrobot Center (MRC) and Robot Research Initiative (RRI), Chonnam National University, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea
| | - Sukho Park
- Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-Gu, Seoul 05505, Republic of Korea
| | - Jong-Oh Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea; Medical Microrobot Center (MRC) and Robot Research Initiative (RRI), Chonnam National University, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea.
| | - Eunpyo Choi
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea; Medical Microrobot Center (MRC) and Robot Research Initiative (RRI), Chonnam National University, 43-26, Cheomdangwagi-ro 208-beon-gil, Buk-gu, Gwangju 61011, Republic of Korea.
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Kim ST, Kim SY, Klempner SJ, Yoon J, Kim N, Ahn S, Bang H, Kim KM, Park W, Park SH, Park JO, Park YS, Lim HY, Lee SH, Park K, Kang WK, Lee J. Rapamycin-insensitive companion of mTOR (RICTOR) amplification defines a subset of advanced gastric cancer and is sensitive to AZD2014-mediated mTORC1/2 inhibition. Ann Oncol 2017; 28:547-554. [PMID: 28028034 DOI: 10.1093/annonc/mdw669] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Background Targeting oncogenic genomic aberrations is an established therapeutic strategy in multiple tumor types. Molecular classification has uncovered a number of novel targets, and rapamycin-insensitive companion of mTOR (RICTOR) amplification has been identified in lung cancer. Further investigation assessing the therapeutic potential of RICTOR amplification as a novel target across advanced cancers is needed. Patients and methods Tumor samples from 640 patients with metastatic solid tumors, primarily gastrointestinal and lung cancers were prospectively subjected to a next-generation sequencing (NGS) assay to identify molecular targets. Samples with NGS-detected RICTOR amplification were confirmed with FISH. A RICTOR-amplified patient-derived cell (PDC) line was generated and used to investigate the effectiveness of selective AKT, mTORC1, and mTORC1/2 inhibition. Results NGS identified 13 (2%) of 640 patients with RICTOR-amplified tumors (6 gastric, 3 NSCLC, 1 SCLC, 1 CRC, 1 sarcoma, 1 MUO). Of the 13 patients, seven patients had RICTOR protein overexpression by IHC. The prevalence of RICTOR amplification in gastric cancer by NGS was 3.8% (6/160). FISH testing confirmed amplification (RICTOR/control >2) in 5/13 (38%) of samples, including four gastric cancers and one lung cancer. Treatment of a RICTOR amplified PDC with a selective AKT (AZD5363), selective mTORC1 (everolimus), dual mTORC1/2 (AZD2014), and the multi-target kinase inhibitor pazopanib demonstrated preferential sensitivity to the mTORC1/2 inhibitor (AZD2014). Knockdown of RICTOR reversed PDC sensitivity to AZD2014, validating the importance of RICTOR amplification to the PDC line. Conclusions RICTOR amplification is a rare but therapeutically relevant genomic alteration across solid tumors. Our results support further pre-clinical and clinical investigation with AZD2014 in RICTOR amplified gastric cancer and highlights the importance of genomic profiling.
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Affiliation(s)
- S T Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S Y Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S J Klempner
- The Angeles Clinic and Research Institute, Los Angeles, USA.,Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, USA
| | - J Yoon
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea
| | - N Kim
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea
| | - S Ahn
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea.,Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Bang
- Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,The Innovative Cancer Medicine Institute, Samsung Medical Center, Seoul, Korea
| | - K-M Kim
- Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,The Innovative Cancer Medicine Institute, Samsung Medical Center, Seoul, Korea
| | - W Park
- Samsung Genome Institute, Samsung Medical Center, Seoul, Korea
| | - S H Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Y S Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H Y Lim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S H Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.,The Innovative Cancer Medicine Institute, Samsung Medical Center, Seoul, Korea
| | - W K Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Lee
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Zheng S, Nguyen VD, Song SY, Han J, Park JO. Combined photothermal-chemotherapy of breast cancer by near infrared light responsive hyaluronic acid-decorated nanostructured lipid carriers. Nanotechnology 2017; 28:435102. [PMID: 28783035 DOI: 10.1088/1361-6528/aa847f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this study, a novel type of hyaluronic acid (HA)-decorated nanostructured lipid carrier (NLC) was prepared and investigated as a light-triggered drug release and combined photothermal-chemotherapy for cancer treatment. Polyhedral gold nanoparticles (Au NPs) with an average size of 10 nm were synthesized and co-encapsulated with doxorubicin (DOX) in the matrix of NLCs with a high drug loading efficiency (above 80%). HA decoration was achieved by the electrostatic interaction between HA and CTAB on the NLC surface. A remarkable temperature increase was observed by exposing the Au NP-loaded NLCs to an NIR laser, which heated the samples sufficiently (above 40 °C) to kill tumor cells. The entrapped DOX exhibited a sustained, stepwise NIR laser-triggered drug release pattern. The biocompatibility of the NLCs was investigated by MTT assay and the cell viability was maintained above 85%, even at high concentrations. The intracellular uptake of free DOX and entrapped DOX, observed by confocal microscopy, revealed two distinct uptake mechanisms, i.e. passive diffusion and endocytosis, respectively. In particular, internalization of the HA-Au-DOX-NLCs was more extensively enhanced than the Au-DOX-NLCs, which was attributed to HA-CD44 receptor-mediated endocytosis. Meanwhile, the internalized NLCs successfully escaped from the lysosomes, increasing the intracellular DOX. The HA-Au-DOX-NLCs IC50 value decreased from 2.3 to 0.6 μg ml-1 with NIR irradiation at 72 h, indicating the excellent synergistic antitumor effect of photothermal-chemotherapy. The photothermal ablation was further confirmed by a live/dead cell staining assay. Thus, a combined photothermal-chemotherapy approach has been proposed as a promising strategy for cancer treatment.
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Affiliation(s)
- Shaohui Zheng
- School of Mechanical Systems Engineering, Chonnam National University, Gwangju, 500-757, Republic of Korea
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Li H, Jin Z, Cho S, Jeon MJ, Nguyen VD, Park JO, Park S. Folate-receptor-targeted NIR-sensitive polydopamine nanoparticles for chemo-photothermal cancer therapy. Nanotechnology 2017; 28:425101. [PMID: 28944765 DOI: 10.1088/1361-6528/aa8477] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We propose the use of folate-receptor-targeted, near-infrared-sensitive polydopamine nanoparticles (NPs) for chemo-photothermal cancer therapy as an enhanced type of drug-delivery system which can be synthesized by in situ polymerization and conjugation with folic acid. The NPs consist of a Fe3O4/Au core, coated polydopamine, conjugated folic acid, and loaded anti-cancer drug (doxorubicin). The proposed multifunctional NPs show many advantages for therapeutic applications such as good biocompatibility and easy bioconjugation. The polydopamine coating of the NPs show a higher photothermal effect and thus more effective cancer killing compared to Fe3O4/Au nanoparticles at the same intensity as near-infrared laser irradiation. In addition, the conjugation of folic acid was shown to enhance cancer cellular uptake efficiency via the folate receptor and thus improve chemotherapeutic efficiency. Through in vitro cancer cell treatment testing, the proposed multifunctional NPs showed advanced photothermal and chemotherapeutic performance. Based on these enhanced anti-cancer properties, we expect that the proposed multifunctional NPs can be used as a drug-delivery system in cancer therapy.
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Affiliation(s)
- Hao Li
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea
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