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Park BC, Soh JO, Choi HJ, Park HS, Lee SM, Fu HE, Kim MS, Ko MJ, Koo TM, Lee JY, Kim YK, Lee JH. Ultrasensitive and Rapid Circulating Tumor DNA Liquid Biopsy Using Surface-Confined Gene Amplification on Dispersible Magnetic Nano-Electrodes. ACS Nano 2024; 18:12781-12794. [PMID: 38733343 DOI: 10.1021/acsnano.3c12266] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2024]
Abstract
Circulating tumor DNA (ctDNA) detection has been acknowledged as a promising liquid biopsy approach for cancer diagnosis, with various ctDNA assays used for early detection and treatment monitoring. Dispersible magnetic nanoparticle-based electrochemical detection methods have been proposed as promising candidates for ctDNA detection based on the detection performance and features of the platform material. This study proposes a nanoparticle surface-localized genetic amplification approach by integrating Fe3O4-Au core-shell nanoparticles into polymerase chain reactions (PCR). These highly dispersible and magnetically responsive superparamagnetic nanoparticles act as nano-electrodes that amplify and accumulate target ctDNA in situ on the nanoparticle surface upon PCR amplification. These nanoparticles are subsequently captured and subjected to repetitive electrochemical measurements to induce reconfiguration-mediated signal amplification for ultrasensitive (∼3 aM) and rapid (∼7 min) metastatic breast cancer ctDNA detection in vitro. The detection platform can also detect metastatic biomarkers from in vivo samples, highlighting the potential for clinical applications and further expansion to rapid and ultrasensitive multiplex detection of various cancers.
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Affiliation(s)
- Bum Chul Park
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, United States
| | - Jeong Ook Soh
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, Republic of Korea
| | - Hee-Joo Choi
- Department of Pathology, Hanyang University, Seoul 04763, Republic of Korea
- Hanyang Institute of Bioscience and Biotechnology (HY-IBB), Hanyang University, Seoul 04763, Republic of Korea
- Hanyang Biomedical Research Institute (HBRI), Hanyang University, Seoul 04763, Republic of Korea
| | - Hyeon Su Park
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sang Min Lee
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, Republic of Korea
| | - Hong En Fu
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Myeong Soo Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Min Jun Ko
- Department of Radiology, Northwestern University, Chicago, Illinois 60611, United States
| | - Thomas Myeongseok Koo
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jeong-Yeon Lee
- Department of Pathology, Hanyang University, Seoul 04763, Republic of Korea
- Hanyang Institute of Bioscience and Biotechnology (HY-IBB), Hanyang University, Seoul 04763, Republic of Korea
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Brain Korea Center for Smart Materials and Devices, Korea University, Seoul 02841, Republic of Korea
| | - Ju Hun Lee
- Department of Bionano Engineering, Hanyang University, Ansan 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, Republic of Korea
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Moon JH, Oh E, Koo TM, Jeon YS, Jang YJ, Fu HE, Ko MJ, Kim YK. One-Step Electrochemical Synthesis of Multiyolk-Shell Nanocoils for Exceptional Photocatalytic Performance. Adv Mater 2024; 36:e2312214. [PMID: 38190643 DOI: 10.1002/adma.202312214] [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: 11/15/2023] [Revised: 12/21/2023] [Indexed: 01/10/2024]
Abstract
Multiyolk-shell (mYS) nanostructures have garnered significant interest in various photocatalysis applications such as water splitting and waste treatment. Nonetheless, the complexity and rigorous conditions for the synthesis have hindered their widespread implementation. This study presents a one-step electrochemical strategy for synthesizing multiyolk-shell nanocoils (mYSNC), wherein multiple cores of noble metal nanoparticles, such as Au, are embedded within the hollow coil-shaped FePO4 shell structures, mitigating the challenges posed by conventional methods. By capitalizing on the dissimilar dissolution rates of bimetallic alloy nanocoils in an electrochemically programmed solution, nanocoils of different shapes and materials, including two variations of mYSNCs are successfully fabricated. The resulting Au-FePO4 mYSNCs exhibit exceptional photocatalytic performance for environmental remediation, demonstrating up to 99% degradation of methylene blue molecules within 50 min and 95% degradation of tetracycline within 100 min under ultraviolet-visible (UV-vis) light source. This remarkable performance can be attributed to the abundant electrochemical active sites, internal voids facilitating efficient light harvesting with coil morphology, amplified localized surface plasmon resonance (LSPR) at the plasmonic nanoparticle-semiconductor interface, and effective band engineering. The innovative approach utilizing bimetallic alloys demonstrates precise geometric control and design of intricate multicomponent hybrid composites, showcasing the potential for developing versatile hollow nanomaterials for catalytic applications.
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Affiliation(s)
- Jun Hwan Moon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Eunsoo Oh
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Thomas Myeongseok Koo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yoo Sang Jeon
- Institute of Engineering Research, Korea University, Seoul, 02841, Republic of Korea
| | - Young Jun Jang
- Department of Semiconductor Systems Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hong En Fu
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
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Abstract
Photonic nanomaterials, characterized by their remarkable photonic tunability, empower a diverse range of applications, including cutting-edge advances in cancer nanomedicine. Recently, ferroptosis has emerged as a promising alternative strategy for effectively killing cancer cells with minimizing therapeutic resistance. Novel design of photonic nanomaterials that can integrate photoresponsive-ferroptosis inducers, -diagnostic imaging, and -synergistic components provide significant benefits to effectively trigger local ferroptosis. This review provides a comprehensive overview of recent advancements in photonic nanomaterials for image-guided ferroptosis cancer nanomedicine, offering insights into their strengths, constraints, and their potential as a future paradigm in cancer treatment.
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Affiliation(s)
- Min Jun Ko
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Woojung Yoo
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital Harvard Medical School, Cambridge, MA 02139, USA
| | - Jinmyoung Joo
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Heemin Kang
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- College of Medicine, Korea University, Seoul 02841, Republic of Korea
| | - Dong-Hyun Kim
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
- Department of Biomedical Engineering, University of Illinois, Chicago, IL 60607, USA
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Ko MJ, Min S, Hong H, Yoo W, Joo J, Zhang YS, Kang H, Kim DH. Magnetic nanoparticles for ferroptosis cancer therapy with diagnostic imaging. Bioact Mater 2024; 32:66-97. [PMID: 37822917 PMCID: PMC10562133 DOI: 10.1016/j.bioactmat.2023.09.015] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/06/2023] [Accepted: 09/23/2023] [Indexed: 10/13/2023] Open
Abstract
Ferroptosis offers a novel method for overcoming therapeutic resistance of cancers to conventional cancer treatment regimens. Its effective use as a cancer therapy requires a precisely targeted approach, which can be facilitated by using nanoparticles and nanomedicine, and their use to enhance ferroptosis is indeed a growing area of research. While a few review papers have been published on iron-dependent mechanism and inducers of ferroptosis cancer therapy that partly covers ferroptosis nanoparticles, there is a need for a comprehensive review focusing on the design of magnetic nanoparticles that can typically supply iron ions to promote ferroptosis and simultaneously enable targeted ferroptosis cancer nanomedicine. Furthermore, magnetic nanoparticles can locally induce ferroptosis and combinational ferroptosis with diagnostic magnetic resonance imaging (MRI). The use of remotely controllable magnetic nanocarriers can offer highly effective localized image-guided ferroptosis cancer nanomedicine. Here, recent developments in magnetically manipulable nanocarriers for ferroptosis cancer nanomedicine with medical imaging are summarized. This review also highlights the advantages of current state-of-the-art image-guided ferroptosis cancer nanomedicine. Finally, image guided combinational ferroptosis cancer therapy with conventional apoptosis-based therapy that enables synergistic tumor therapy is discussed for clinical translations.
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Affiliation(s)
- Min Jun Ko
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyunsik Hong
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Woojung Yoo
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jinmyoung Joo
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital Harvard Medical School, Cambridge, MA, 02139, USA
| | - Heemin Kang
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- College of Medicine, Korea University, Seoul, 02841, Republic of Korea
| | - Dong-Hyun Kim
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Department of Biomedical Engineering, University of Illinois, Chicago, IL, 60607, USA
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, 60611, USA
- Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL, 60208, USA
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Ko MJ, Hong H, Choi H, Kang H, Kim D. Multifunctional Magnetic Nanoparticles for Dynamic Imaging and Therapy. Advanced NanoBiomed Research 2022. [DOI: 10.1002/anbr.202270111] [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: 11/09/2022] Open
Affiliation(s)
- Min Jun Ko
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
| | - Hyunsik Hong
- Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea
| | - Hyunjun Choi
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
- Department of Bioengineering University of Illinois at Chicago Chicago IL 60607 USA
| | - Heemin Kang
- Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea
- College of Medicine Korea University Seoul 02841 Republic of Korea
| | - Dong‐Hyun Kim
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
- Department of Bioengineering University of Illinois at Chicago Chicago IL 60607 USA
- Department of Biomedical Engineering McCormick School of Engineering Northwestern University Evanston IL 60208 USA
- Robert H. Lurie Comprehensive Cancer Center Northwestern University Chicago Illinois 60611 USA
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Samardak AY, Jeon YS, Samardak VY, Kozlov AG, Rogachev KA, Ognev AV, Jeong E, Kim GW, Ko MJ, Samardak AS, Kim YK. Interwire and Intrawire Magnetostatic Interactions in Fe-Au Barcode Nanowires with Alternating Ferromagnetically Strong and Weak Segments. Small 2022; 18:e2203555. [PMID: 36192153 DOI: 10.1002/smll.202203555] [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] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/07/2022] [Indexed: 06/16/2023]
Abstract
Metallic barcode nanowires (BNWs) composed of repeating heterogeneous segments fabricated by template-assisted electrodeposition can offer extended functionality in magnetic, electrical, mechanical, and biomedical applications. The authors consider such nanostructures as a 3D system of magnetically interacting elements with magnetic behavior strongly affected by complex magnetostatic interactions. This study discusses the influence of geometrical parameters of segments on the character of their interactions and the overall magnetic behavior of the array of BNWs having alternating magnetization, because the Fe and Au segments are made of Fe-Au alloys with high and low magnetizations. By controlling the applied current densities and the elapsed time in the electrodeposition, the dimension of the Fe-Au BNWs can be regulated. This study reveals that the influence of the length of magnetically weak Au segments on the interaction field between nanowires is different for samples with magnetically strong 100 and 200 nm long Fe segments using the first-order reversal curve (FORC) diagram method. With the help of micromagnetic simulations, three types of magnetostatic interactions in the BNW arrays are discovered and analy. This study demonstrates that the dominating type of interaction depends on the geometric parameters of the Fe and Au segments and the interwire and intrawire distances.
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Affiliation(s)
- Aleksei Yu Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Yoo Sang Jeon
- Center for Hydrogen·Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Vadim Yu Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Alexey G Kozlov
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Kirill A Rogachev
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Alexey V Ognev
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Eunjin Jeong
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Gyu Won Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Alexander S Samardak
- Institute of High Technologies and Advanced Materials, Far Eastern Federal University, Vladivostok, 690922, Russia
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
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Kim KS, Choi B, Choi H, Ko MJ, Kim DH, Kim DH. Enhanced natural killer cell anti-tumor activity with nanoparticles mediated ferroptosis and potential therapeutic application in prostate cancer. J Nanobiotechnology 2022; 20:428. [PMID: 36175895 PMCID: PMC9523925 DOI: 10.1186/s12951-022-01635-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [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] [Received: 03/15/2022] [Accepted: 09/14/2022] [Indexed: 11/10/2022] Open
Abstract
Ferroptosis provides an opportunity to overcome the cancer cell therapeutic resistance and modulate the immune system. Here an interaction between ferroptosis of cancer cells and natural killer (NK) cells was investigated with a clinical grade iron oxide nanoparticle (ferumoxytol) for potential synergistic anti-cancer effect of ferroptosis and NK cell therapy in prostate cancer. When ferumoxytol mediated ferroptosis of cancer cells was combined with NK cells, the NK cells' cytotoxic function was increased. Observed ferroptosis mediated NK cell activation was also confirmed with IFN-γ secretion and lytic degranulation. Upregulation of ULBPs, which is one of the ligands for NK cell activating receptor NKG2D, was observed in the co-treatment of ferumoxytol mediated ferroptosis and NK cells. Additionally, HMGB1 and PD-L1 expression of cancer cells were observed in the treatment of ferroptosis + NK cells. Finally, in vivo therapeutic efficacy of ferumoxytol mediated ferroptosis and NK cell therapy was observed with significant tumor volume regression in a prostate cancer mice model. These results suggest that the NK cells' function can be enhanced with ferumoxytol mediated ferroptosis.
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Affiliation(s)
- Kwang-Soo Kim
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Bongseo Choi
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Hyunjun Choi
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA.,Department of Biomedical Engineering, University of Illinois, Chicago, IL, 60607, USA
| | - Min Jun Ko
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Dong-Hwan Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Korea.
| | - Dong-Hyun Kim
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA. .,Department of Biomedical Engineering, University of Illinois, Chicago, IL, 60607, USA. .,Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, 60611, USA. .,Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL, 60208, USA.
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Ko MJ, Hong H, Choi H, Kang H, Kim D. Multifunctional Magnetic Nanoparticles for Dynamic Imaging and Therapy. Advanced NanoBiomed Research 2022. [DOI: 10.1002/anbr.202200053] [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] Open
Affiliation(s)
- Min Jun Ko
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
| | - Hyunsik Hong
- Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea
| | - Hyunjun Choi
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
- Department of Bioengineering University of Illinois at Chicago Chicago IL 60607 USA
| | - Heemin Kang
- Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea
- College of Medicine Korea University Seoul 02841 Republic of Korea
| | - Dong‐Hyun Kim
- Department of Radiology Feinberg School of Medicine Northwestern University Chicago IL 60611 USA
- Department of Bioengineering University of Illinois at Chicago Chicago IL 60607 USA
- Department of Biomedical Engineering McCormick School of Engineering Northwestern University Evanston IL 60208 USA
- Robert H. Lurie Comprehensive Cancer Center Northwestern University Chicago Illinois 60611 USA
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Moon JH, Lee MY, Park BC, Jeon YS, Kim S, Kim T, Ko MJ, Cho KH, Nam KT, Kim YK. Inorganic Hollow Nanocoils Fabricated by Controlled Interfacial Reaction and Their Electrocatalytic Properties. Small 2021; 17:e2103575. [PMID: 34561965 DOI: 10.1002/smll.202103575] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/07/2021] [Indexed: 06/13/2023]
Abstract
The fabrication of 3D hollow nanostructures not only allows the tactical provision of specific physicochemical properties but also broadens the application scope of such materials in various fields. The synthesis of 3D hollow nanocoils (HNCs), however, is limited by the lack of an appropriate template or synthesis method, thereby restricting the wide-scale application of HNCs. Herein, a strategy for preparing HNCs by harnessing a single sacrificial template to modulate the interfacial reaction at a solid-liquid interface that allows the shape-regulated transition is studied. Furthermore, the triggering of the Kirkendall effect in 3D HNCs is demonstrated. Depending on the final state of the transition metal ions reduced during the electrochemical preparation of HNCs, the surface states of the binding anions and the composition of the HNCs can be tuned. In a single-component CrPO4 HNC with a clean surface, the Kirkendall effect of the coil shape is analyzed at various points throughout the reaction. The rough-surface multicomponent MnOx P0.21 HNCs are complexed with ligand-modified BF4 -Mn3 O4 nanoparticles. The fabricated nanocomposite exhibits an overpotential decrease of 25 mV at neutral pH compared to pure BF4 -Mn3 O4 nanoparticles because of the increased active surface area.
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Affiliation(s)
- Jun Hwan Moon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Moo Young Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Bum Chul Park
- Brain Korea Center for Smart Materials and Devices, Korea University, Seoul, 02841, Republic of Korea
| | - Yoo Sang Jeon
- Institute of Engineering Research, Korea University, Seoul, 02841, Republic of Korea
| | - Seunghyun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Taesoon Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Kang Hee Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Brain Korea Center for Smart Materials and Devices, Korea University, Seoul, 02841, Republic of Korea
- Institute of Engineering Research, Korea University, Seoul, 02841, Republic of Korea
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Koo TM, Ko MJ, Park BC, Kim MS, Kim YK. Fluorescent detection of dipicolinic acid as a biomarker in bacterial spores employing terbium ion-coordinated magnetite nanoparticles. J Hazard Mater 2021; 408:124870. [PMID: 33387720 DOI: 10.1016/j.jhazmat.2020.124870] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 12/04/2020] [Accepted: 12/11/2020] [Indexed: 06/12/2023]
Abstract
Anthrax is a bioterror agent because of its toxicity and the tolerance of its bacterial spores. Thus, researchers have attempted to develop various nanomaterials to detect dipicolinic acid (DPA), a biomarker of bacterial spores. Nanomaterials containing lanthanide ions have received considerable attention, owing to their potential to exhibit high sensitivity and selectivity in the detection of DPA via chelation with molecules. However, the fluorescent signals of the lanthanide complex are quenchable because the nanomaterials simultaneously absorb the excitation and emission light. For the precise detection of DPA, pure signals have to be obtained from the complex by alleviating the quenching effect of the nanomaterials. In this study, we develop a structure with terbium ion (Tb3+)-coordinated magnetite (Fe3O4) nanoparticle to detect DPA. Tb3+ can be detached from the magnetite during chelation with the DPA, and the complex can emit the unencumbered signals with improved detection limit through the application of a magnetic field. The detection system exhibits a significantly lower detection limit (5.4 nM) than the infectious dosage of anthrax (60 μM) with high selectivity and chemical stability. This study informs the improvement of detection limits via the separation of nanomaterials and lanthanide complex.
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Affiliation(s)
- Thomas Myeongseok Koo
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Bum Chul Park
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea; Brain Korea Center for Smart Materials and Devices, Korea University, Seoul 02841, Republic of Korea
| | - Myeong Soo Kim
- Institute for High Technology Materials and Devices, Korea University, Seoul 02841, Republic of Korea
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea; Brain Korea Center for Smart Materials and Devices, Korea University, Seoul 02841, Republic of Korea; Institute for High Technology Materials and Devices, Korea University, Seoul 02841, Republic of Korea.
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11
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Min S, Ko MJ, Jung HJ, Kim W, Han SB, Kim Y, Bae G, Lee S, Thangam R, Choi H, Li N, Shin JE, Jeon YS, Park HS, Kim YJ, Sukumar UK, Song JJ, Park SK, Yu SH, Kang YC, Lee KB, Wei Q, Kim DH, Han SM, Paulmurugan R, Kim YK, Kang H. Remote Control of Time-Regulated Stretching of Ligand-Presenting Nanocoils In Situ Regulates the Cyclic Adhesion and Differentiation of Stem Cells. Adv Mater 2021; 33:e2008353. [PMID: 33527502 DOI: 10.1002/adma.202008353] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Indexed: 06/12/2023]
Abstract
Native extracellular matrix (ECM) can exhibit cyclic nanoscale stretching and shrinking of ligands to regulate complex cell-material interactions. Designing materials that allow cyclic control of changes in intrinsic ligand-presenting nanostructures in situ can emulate ECM dynamicity to regulate cellular adhesion. Unprecedented remote control of rapid, cyclic, and mechanical stretching ("ON") and shrinking ("OFF") of cell-adhesive RGD ligand-presenting magnetic nanocoils on a material surface in five repeated cycles are reported, thereby independently increasing and decreasing ligand pitch in nanocoils, respectively, without modulating ligand-presenting surface area per nanocoil. It is demonstrated that cyclic switching "ON" (ligand nanostretching) facilitates time-regulated integrin ligation, focal adhesion, spreading, YAP/TAZ mechanosensing, and differentiation of viable stem cells, both in vitro and in vivo. Fluorescence resonance energy transfer (FRET) imaging reveals magnetic switching "ON" (stretching) and "OFF" (shrinking) of the nanocoils inside animals. Versatile tuning of physical dimensions and elements of nanocoils by regulating electrodeposition conditions is also demonstrated. The study sheds novel insight into designing materials with connected ligand nanostructures that exhibit nanocoil-specific nano-spaced declustering, which is ineffective in nanowires, to facilitate cell adhesion. This unprecedented, independent, remote, and cytocompatible control of ligand nanopitch is promising for regulating the mechanosensing-mediated differentiation of stem cells in vivo.
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Affiliation(s)
- Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hee Joon Jung
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- International Institute for Nanotechnology, Evanston, IL, USA
- NUANCE Center, Northwestern University, Evanston, IL, USA
| | - Wonsik Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Seong-Beom Han
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Yuri Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Gunhyu Bae
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Sungkyu Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ramar Thangam
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyojun Choi
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Na Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, 08308, Republic of Korea
| | - Jeong Eun Shin
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yoo Sang Jeon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyeon Su Park
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yu Jin Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Uday Kumar Sukumar
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Jae-Jun Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, 08308, Republic of Korea
| | - Seung-Keun Park
- Department of Chemical Engineering, Kongju National University, Cheonan, 31080, Republic of Korea
| | - Seung-Ho Yu
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yun Chan Kang
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, 08854, USA
| | - Qiang Wei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering, Sichuan University, Chengdu, 610065, China
| | - Dong-Hwee Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Seung Min Han
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Ramasamy Paulmurugan
- Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
- Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Stanford University, Palo Alto, CA, 94304, USA
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Heemin Kang
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
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12
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Ko MJ, Park BC, Koo TM, Jeon YS, Kim MS, Kim YK. Multi-Component Mesocrystalline Nanoparticles with Enhanced Photocatalytic Activity. Small 2020; 16:e2004696. [PMID: 33215854 DOI: 10.1002/smll.202004696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/07/2020] [Indexed: 06/11/2023]
Abstract
Mesocrystals, consisting of small subunits, have gained research interests owing to their ability to simultaneously modify material-specific properties and interactions among subunits. However, despite these unique characteristics, most mesocrystals are composed of a single material, and there is a disjunction between academic discovery and practical application. In this study, the synthesis of multi-component mesocrystalline nanoparticles composed of Fe3 O4 , ZnFe2 O4 , and ZnO subunits using a polymerization induced heterogeneous nucleation method is reported. The structure has small ZnFe2 O4 and ZnO nanocrystals covering the Fe3 O4 crystallites. It exhibits not only magnetic and catalytic properties determined by the size of each subunit nanocrystal, but also enhances photocatalytic and colloidal properties that originates because of its crowded arrangement. The magnetically recoverable catalysts exhibit remarkable photodegradation of organic molecules under the irradiation of visible light for 1 h; thus, improving its applicability in purifying a large amount of wastewater during the daytime.
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Affiliation(s)
- Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Bum Chul Park
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- BK21 Plus Center for Creative Materials and Components, Korea University, Seoul, 02841, Republic of Korea
| | - Thomas Myeongseok Koo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yoo Sang Jeon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Research Institute of Engineering and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Myeong Soo Kim
- Institute of High Technology Materials and Devices, Korea University, Seoul, 02841, Republic of Korea
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- BK21 Plus Center for Creative Materials and Components, Korea University, Seoul, 02841, Republic of Korea
- Research Institute of Engineering and Technology, Korea University, Seoul, 02841, Republic of Korea
- Institute of High Technology Materials and Devices, Korea University, Seoul, 02841, Republic of Korea
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13
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Min S, Jeon YS, Choi H, Khatua C, Li N, Bae G, Jung HJ, Kim Y, Hong H, Shin J, Ko MJ, Ko HS, Kim T, Moon JH, Song JJ, Dravid VP, Kim YK, Kang H. Large and Externally Positioned Ligand-Coated Nanopatches Facilitate the Adhesion-Dependent Regenerative Polarization of Host Macrophages. Nano Lett 2020; 20:7272-7280. [PMID: 32910662 DOI: 10.1021/acs.nanolett.0c02655] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 06/11/2023]
Abstract
Macrophages can associate with extracellular matrix (ECM) demonstrating nanosequenced cell-adhesive RGD ligand. In this study, we devised barcoded materials composed of RGD-coated gold and RGD-absent iron nanopatches to show various frequencies and position of RGD-coated nanopatches with similar areas of iron and RGD-gold nanopatches that maintain macroscale and nanoscale RGD density invariant. Iron patches were used for substrate coupling. Both large (low frequency) and externally positioned RGD-coated nanopatches stimulated robust attachment in macrophages, compared with small (high frequency) and internally positioned RGD-coated nanopatches, respectively, which mediate their regenerative/anti-inflammatory M2 polarization. The nanobarcodes exhibited stability in vivo. We shed light into designing ligand-engineered nanostructures in an external position to facilitate host cell attachment, thereby eliciting regenerative host responses.
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Affiliation(s)
- Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yoo Sang Jeon
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Research Institute of Engineering and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Hyojun Choi
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Chandra Khatua
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Na Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul 08308, Republic of Korea
| | - Gunhyu Bae
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hee Joon Jung
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Yuri Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyunsik Hong
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jeongeun Shin
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Han Seok Ko
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Taesoon Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jun Hwan Moon
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jae-Jun Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul 08308, Republic of Korea
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul 02841, Republic of Korea
| | - Heemin Kang
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul 02841, Republic of Korea
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14
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Min S, Jeon YS, Jung HJ, Khatua C, Li N, Bae G, Choi H, Hong H, Shin JE, Ko MJ, Ko HS, Jun I, Fu HE, Kim SH, Thangam R, Song JJ, Dravid VP, Kim YK, Kang H. Independent Tuning of Nano-Ligand Frequency and Sequences Regulates the Adhesion and Differentiation of Stem Cells. Adv Mater 2020; 32:e2004300. [PMID: 32820574 DOI: 10.1002/adma.202004300] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Indexed: 06/11/2023]
Abstract
The native extracellular matrix (ECM) can exhibit heterogeneous nano-sequences periodically displaying ligands to regulate complex cell-material interactions in vivo. Herein, an ECM-emulating heterogeneous barcoding system, including ligand-bearing Au and ligand-free Fe nano-segments, is developed to independently present tunable frequency and sequences in nano-segments of cell-adhesive RGD ligand. Specifically, similar exposed surface areas of total Fe and Au nano-segments are designed. Fe segments are used for substrate coupling of nanobarcodes and as ligand-free nano-segments and Au segments for ligand coating while maintaining both nanoscale (local) and macroscale (total) ligand density constant in all groups. Low nano-ligand frequency in the same sequences and terminally sequenced nano-ligands at the same frequency independently facilitate focal adhesion and mechanosensing of stem cells, which are collectively effective both in vitro and in vivo, thereby inducing stem cell differentiation. The Fe/RGD-Au nanobarcode implants exhibit high stability and no local and systemic toxicity in various tissues and organs in vivo. This work sheds novel insight into designing biomaterials with heterogeneous nano-ligand sequences at terminal sides and/or low frequency to facilitate cellular adhesion. Tuning the electrodeposition conditions can allow synthesis of unlimited combinations of ligand nano-sequences and frequencies, magnetic elements, and bioactive ligands to remotely regulate numerous host cells in vivo.
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Affiliation(s)
- Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yoo Sang Jeon
- Research Institute of Engineering and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Hee Joon Jung
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- International Institute for Nanotechnology, Evanston, IL, 60208, USA
- NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Chandra Khatua
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Na Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, 08308, Republic of Korea
| | - Gunhyu Bae
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyojun Choi
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hyunsik Hong
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jeong Eun Shin
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Han Seok Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Indong Jun
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, 08308, Republic of Korea
| | - Hong En Fu
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Seung Hyun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ramar Thangam
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jae-Jun Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, 08308, Republic of Korea
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- International Institute for Nanotechnology, Evanston, IL, 60208, USA
- NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Heemin Kang
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
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15
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Khatua C, Min S, Jung HJ, Shin JE, Li N, Jun I, Liu HW, Bae G, Choi H, Ko MJ, Jeon YS, Kim YJ, Lee J, Ko M, Shim G, Shin H, Lee S, Chung S, Kim YK, Song JJ, Dravid VP, Kang H. In Situ Magnetic Control of Macroscale Nanoligand Density Regulates the Adhesion and Differentiation of Stem Cells. Nano Lett 2020; 20:4188-4196. [PMID: 32406688 DOI: 10.1021/acs.nanolett.0c00559] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 06/11/2023]
Abstract
Developing materials with remote controllability of macroscale ligand presentation can mimic extracellular matrix (ECM) remodeling to regulate cellular adhesion in vivo. Herein, we designed charged mobile nanoligands with superparamagnetic nanomaterials amine-functionalized and conjugated with polyethylene glycol linker and negatively charged RGD ligand. We coupled negatively a charged nanoligand to a positively charged substrate by optimizing electrostatic interactions to allow reversible planar movement. We demonstrate the imaging of both macroscale and in situ nanoscale nanoligand movement by magnetically attracting charged nanoligand to manipulate macroscale ligand density. We show that in situ magnetic control of attracting charged nanoligand facilitates stem cell adhesion, both in vitro and in vivo, with reversible control. Furthermore, we unravel that in situ magnetic attraction of charged nanoligand stimulates mechanosensing-mediated differentiation of stem cells. This remote controllability of ECM-mimicking reversible ligand variations is promising for regulating diverse reparative cellular processes in vivo.
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Affiliation(s)
- Chandra Khatua
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sunhong Min
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hee Joon Jung
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Jeong Eun Shin
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Na Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul 02841, Republic of Korea
| | - Indong Jun
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul 02841, Republic of Korea
| | - Hui-Wen Liu
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Gunhyu Bae
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hyojun Choi
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yoo Sang Jeon
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yu Jin Kim
- Institute for High Technology Materials and Devices, Korea University, Seoul 02841, Republic of Korea
| | - Joonbum Lee
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Minji Ko
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Gyubo Shim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hongchul Shin
- Department of Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Sangbum Lee
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seok Chung
- Department of Biomicrosystem Technology, Korea University, Seoul 02841, Republic of Korea
- School of Mechanical Engineering, Korea University, Seoul 02841, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
| | - Young Keun Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul 02841, Republic of Korea
| | - Jae-Jun Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul 02841, Republic of Korea
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Heemin Kang
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul 02841, Republic of Korea
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16
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Kim MS, Park BC, Kim YJ, Lee JH, Koo TM, Ko MJ, Kim YK. Design of Magnetic-Plasmonic Nanoparticle Assemblies via Interface Engineering of Plasmonic Shells for Targeted Cancer Cell Imaging and Separation. Small 2020; 16:e2001103. [PMID: 32329574 DOI: 10.1002/smll.202001103] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/21/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Magnetic-plasmonic nanoparticles have received considerable attention for widespread applications. These nanoparticles (NPs) exhibiting surface-enhanced Raman scattering (SERS) activities are developed due to their potential in bio-sensing applicable in non-destructive and sensitive analysis with target-specific separation. However, it is challenging to synthesize these NPs that simultaneously exhibit low remanence, maximized magnetic content, plasmonic coverage with abundant hotspots, and structural uniformity. Here, a method that involves the conjugation of a magnetic template with gold seeds via chemical binding and seed-mediated growth is proposed, with the objective of obtaining plasmonic nanostructures with abundant hotspots on a magnetic template. To obtain a clean surface for directly functionalizing ligands and enhancing the Raman intensity, an additional growth step of gold (Au) and/or silver (Ag) atoms is proposed after modifying the Raman molecules on the as-prepared magnetic-plasmonic nanoparticles. Importantly, one-sided silver growth occurred in an environment where gold facets are blocked by Raman molecules; otherwise, the gold growth is layer-by-layer. Moreover, simultaneous reduction by gold and silver ions allowed for the formation of a uniform bimetallic layer. The enhancement factor of the nanoparticles with a bimetallic layer is approximately 107 . The SERS probes functionalized cyclic peptides are employed for targeted cancer-cell imaging and separation.
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Affiliation(s)
- Myeong Soo Kim
- Department of Biomicrosystem Technology, Korea University, Seoul, 02481, Republic of Korea
| | - Bum Chul Park
- Research Institute of Engineering and Technology, BK21 Plus Center for Creative Materials and Components, Korea University, Seoul, 02481, Republic of Korea
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yu Jin Kim
- The Institute for High Technology Materials and Devices, Korea University, Seoul, 02481, Republic of Korea
| | - Ju Hun Lee
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, Republic of Korea
| | - Thomas Myeongseok Koo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Min Jun Ko
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Young Keun Kim
- Department of Biomicrosystem Technology, Korea University, Seoul, 02481, Republic of Korea
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
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17
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Ahmad D, Min BH, Ko MJ, Seo YL, Choi WJ, Lee JH, Kim GC, Kim YC, Kwon YS. Superconducting properties of hole doped Ba(0.6)Li(0.4)Fe2As2 single crystal. J Phys Condens Matter 2014; 26:175701. [PMID: 24721709 DOI: 10.1088/0953-8984/26/17/175701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report the emergence of superconductivity in Li doped Ba-122 single crystals grown by the Bridgman method. The superconducting transition temperature Tc,onset is around 19 K. The specific heat capacity C/T shows a weak anomaly near Tc. The value of ΔC/γnTc is smaller than the value predicted in BCS theory indicating a multigap nature of the sample. The magnetic measurements show that the lower critical field Hc1(T) exhibits a linear temperature dependence, with a pronounced change of the Hc1(T) curvature around 0.4Tc and Hc1(0) ≈ 430 Oe in the Ba0.6Li0.4Fe2As2 single crystal. Furthermore, temperature dependence of the penetration depth λ(T) follows a power law (~T(n)) below 0.4Tc which predicts possible S±-wave pairing in a Ba0.6Li0.4Fe2As2 superconductor. Over a wide range of temperatures, the Jc(H) exhibits a relation J(c)[proportionality] H(-α) with α = 0.5 ~ 0.6 for H || c and H || ab which indicates random defects in the sample. We found that the temperature dependence of the critical current density Jc(T) can be fitted well with the δl-type pinning model, whose origin is attributed to spatial variations of charge carrier mean free path l. We suggest that the large mismatch in the ionic radius of Ba and Li can affect the irreversible magnetic properties of the Ba0.6Li0.4Fe2As2 single crystal without any structural transition.
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Affiliation(s)
- D Ahmad
- Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 711-873, Republic of Korea
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18
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Ko MJ, Murata K, Hwang DS, Parvin JD. Inhibition of BRCA1 in breast cell lines causes the centrosome duplication cycle to be disconnected from the cell cycle. Oncogene 2006; 25:298-303. [PMID: 16170356 DOI: 10.1038/sj.onc.1209028] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BRCA1-dependent ubiquitination activity regulates centrosome number in several tissue culture cell lines derived from breast cells. In these experiments, we asked how BRCA1 inhibits centrosome amplification. In general, supernumerary centrosomes can accumulate by three mechanisms: (1) failed cytokinesis and the accumulation of centrosomes by duplication in a repeated S-phase of the cell cycle, (2) disruption of the licensing of centrosome doubling such that they duplicate at inappropriate times in the cell cycle, or (3) fragmentation of the centrosomes. In this study, we found that inhibition of BRCA1 caused premature separation of centrioles and reduplication. By blocking cells in early S-phase before centrosome amplification secondary to BRCA1 inhibition could occur and then releasing, we found that inhibition of BRCA1 caused centrosome amplification between late S-phase and G2/M before the cell divided. These results suggest that normal BRCA1 function is critical in these cell lines to prevent centriole separation and centrosome reduplication before mitosis.
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Affiliation(s)
- M J Ko
- Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Korea
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19
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Girotto JA, Ko MJ, Redett R, Muehlberger T, Talamini M, Chang B. Closure of chronic abdominal wall defects: a long-term evaluation of the components separation method. Ann Plast Surg 1999; 42:385-94; discussion 394-5. [PMID: 10213399 DOI: 10.1097/00000637-199904000-00007] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Incisional hernias and abdominal wall defects are frequently iatrogenic problems that have been found to complicate as many as 11% of all abdominal operations. Current techniques for closure of large, chronic abdominal wall defects have limitations. The use of local musculofascial flaps rather than fascial patches (i.e., the tensor fascia lata) or synthetic material for the repair of chronic abdominal wall defects is preferable. The superiority of innervated muscle flaps that provide dynamic abdominal support has been demonstrated. This report focuses on patients with chronic abdominal wall defects in whom previous techniques have failed. An algorithmic approach to planned reconstruction is presented utilizing the "components separation" technique as its foundation. Thirty-seven patients who underwent abdominal reconstruction following this algorithm are reviewed and their clinical course is outlined. The components separation technique provides a compound innervated and vascularized muscle flap for dynamic support of the reconstructed abdominal wall. The experience documented here and by others suggests that this technique is a safe and effective method for reconstructing the abdominal wall in patients with recurrent herniation. Enterocutaneous fistulas, however, continue to present a challenge to the surgeon.
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Affiliation(s)
- J A Girotto
- Division of Plastic and Reconstructive Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA
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20
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Lehmann JF, Esselman PC, Ko MJ, Smith JC, deLateur BJ, Dralle AJ. Plastic ankle-foot orthoses: evaluation of function. Arch Phys Med Rehabil 1983; 64:402-7. [PMID: 6615177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Plastic ankle-foot orthoses (PAFOs) are worn by persons with hemiplegia to correct gait abnormalities such as foot drop during swing and insufficient pushoff during stance. A PAFO should resist plantarflexion sufficiently to provide toe clearance during the swing phase of gait without excessively increasing the knee bending moment during heelstrike. It should resist dorsiflexion during late stance to raise the heel to simulate gastrocnemiussoleus muscle group function. Five PAFOs were evaluated as to the amount of plantarflexion-dorsiflexion resistance that was provided when worn by hemiplegic and able-bodied subjects. A self-aligning goniometer measured ankle angle as the subject walked, and a gait event marker system recorded occurrences of gait events. The Seattle design polypropylene orthosis which enclosed the malleoli was the least flexible; it provided the greatest plantarflexion resistance to ensure against toe drag during swing for patients with severe plantarflexion spasticity. It offered the greatest dorsiflexion resistance to provide a good substitute for the gastrocnemiussoleus during the latter part of stance as required by patients with flaccid plantarflexors and full ankle range of motion. Progressive trimming of the Seattle design polypropylene orthosis made it more flexible and comparable in function to the commercially available Engen and Teufel orthoses. The latter 2 orthoses did not provide a pushoff substitute as well as the Seattle design orthosis which enclosed the malleoli, but they did provide an adequate amount of toe clearance during swing. The more flexible orthoses would be appropriate for subjects with mild to moderate plantarflexor spasticity.
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21
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Lehmann JF, Ko MJ, deLateur BJ. Knee moments: origin in normal ambulation and their modification by double-stopped ankle-foot orthoses. Arch Phys Med Rehabil 1982; 63:345-51. [PMID: 7115026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
While the primary function of an ankle-foot orthosis is to stabilize the ankle complex, these devices often cause an unstable knee joint. The effect of a double upright ankle-foot orthosis on knee stability was evaluated during the stance phase of the walking cycle. The external moments applied to the knee in the anteroposterior plane were determined by measuring the ground reaction forces and the position of the knee with respect to these forces. Total knee moment and individual moment contributions of the fore/aft shear and vertical ground reaction forces were analyzed. Moments generated during normal ambulation were compared with those generated by an ankle-foot orthosis with an adjustable double stop. Knee moment components due to fore/aft shear and vertical ground reaction forces tended to counterbalance each other, minimizing the magnitudes of total knee moment. Fore/aft shear moment was most affected by the magnitude of the fore/aft shear force and had the major effect on total knee moment when the fore/aft shear force was peaking during the heel-strike and push-off phases. The vertical force moment was most affected by the length of the moment arm (position of knee center with respect to force) rather than magnitude of force, and had the major effect on total knee moment during midstance phase.
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Lehmann JF, Ko MJ, deLateur BJ. Double-stopped ankle-foot orthosis in flaccid peroneal and tibial paralysis: evaluation of function. Arch Phys Med Rehabil 1980; 61:536-41. [PMID: 7436716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This study was undertaken to evaluate how effectively an ankle-foot orthosis can substitute for paralyzed musculature, and to determine the forces it sustains in so doing. Timing of the events of gait, the ground reaction forces, their magnitude and location, and the brace moments were studied. Midstance phase was found lengthened at the expense of push-off phase. During push-off, vertical loading and posterior shear were markedly reduced by tibial block. Also, the dorsiflexion moment in the orthosis was correspondingly increased. The orthosis was found to substitute for muscle function in that it approximates the foot-ankle motion of heel-strike and allows a push-off substitute.
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