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Park JH, Sung Y, Jo S, Lee SH, Ryu JH, Sun IC, Ahn CH. Applications of Cu 2+-Loaded Silica Nanoparticles to Photothermal Therapy and Tumor-Specific Fluorescence Imaging. J Funct Biomater 2024; 15:81. [PMID: 38667538 PMCID: PMC11051373 DOI: 10.3390/jfb15040081] [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: 02/19/2024] [Revised: 03/21/2024] [Accepted: 03/23/2024] [Indexed: 04/28/2024] Open
Abstract
Copper-based nanomaterials have been employed as therapeutic agents for cancer therapy and diagnosis. Nevertheless, persistent challenges, such as cellular toxicity, non-uniform sizes, and low photothermal efficiency, often constrain their applications. In this study, we present Cu2+-loaded silica nanoparticles fabricated through the chelation of Cu2+ ions by silanol groups. The integration of Cu2+ ions into uniformly sized silica nanoparticles imparts a photothermal therapy effect. Additionally, the amine functionalization of the silica coating facilitates the chemical conjugation of tumor-specific fluorescence probes. These probes are strategically designed to remain in an 'off' state through the Förster resonance energy transfer mechanism until exposed to cysteine enzymes in cancer cells, inducing the recovery of their fluorescence. Consequently, our Cu2+-loaded silica nanoparticles demonstrate an efficient photothermal therapy effect and selectively enable cancer imaging.
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Affiliation(s)
- Ji-Ho Park
- NanoBio Materials Laboratory, Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea; (J.-H.P.)
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; (Y.S.)
| | - Yejin Sung
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; (Y.S.)
| | - SeongHoon Jo
- Biomaterials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Seung Ho Lee
- NanoBio Materials Laboratory, Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea; (J.-H.P.)
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; (Y.S.)
| | - Ju Hee Ryu
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; (Y.S.)
| | - In-Cheol Sun
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; (Y.S.)
| | - Cheol-Hee Ahn
- NanoBio Materials Laboratory, Department of Materials Science and Engineering, College of Engineering, Seoul National University, Seoul 08826, Republic of Korea; (J.-H.P.)
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Lawan I, Luengrojanakul P, Charoensuk K, Argunam H, Ahn CH, Rimdusit S. Improvements in properties of polybenzoxazine-based laser-induced graphene (LIG) by alloying with polyimide and modeling of production process. Nanoscale Adv 2024; 6:1556-1564. [PMID: 38419878 PMCID: PMC10898426 DOI: 10.1039/d3na01026k] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 02/06/2024] [Indexed: 03/02/2024]
Abstract
Laser-induced graphene (LIG) is conventionally produced from polyimide among thermosetting polymer substrates, but its flexible nature limits its tremendous potential in applications where flexibility of the substrate is not desired. Interestingly, polybenzoxazine has also been found to have potential as a substrate in LIG production. However, aside from being brittle, it has inferior char residue and thermal stability relative to polyimide, which could result in the production of LIG with inferior properties. Thus, exploring possible improvements in the properties of the polybenzoxazine-based substrate and LIG by alloying with polybenzoxazine and polyimide is the major motivation of this study. First, the improvement in the toughness, char residue and thermal stability of polybenzoxazine by alloying with polyimide was explored. Second, the properties of a LIG obtained from the polybenzoxazine/polyimide alloy were studied. The electrical sheet resistivity, Raman spectra indices, structural morphologies, and crystal size of the neat polybenzoxazine and polybenzoxazine/polyimide alloy substrates were compared. The results reveal significant improvements in the electrical resistivity, structural morphology, and crystal size of the LIG. In addition, the improved polybenzoxazine/polyimide alloy substrate was used to optimize the operational parameters of the laser machine for the production of the LIG. LIG with a minimum electrical sheet resistivity of 3.61 Ω sq-1, multi-layer crystals as confirmed by Raman spectroscopic analysis, and a sponge-like highly porous structure was achieved with the optimum operational conditions in an ambient environment. Last, a quadratic model was found and validated to suitably define the production process. The study demonstrated an improvement in the property of a rigid polybenzoxazine-based LIG by alloying polybenzoxazine with polyimide for the first time.
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Affiliation(s)
- Ibrahim Lawan
- Chulalongkorn University Faculty of Engineering Thailand
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3
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Cho H, Jeon SI, Shim MK, Ahn CH, Kim K. In situ albumin-binding and esterase-specifically cleaved BRD4-degrading PROTAC for targeted cancer therapy. Biomaterials 2023; 295:122038. [PMID: 36787659 DOI: 10.1016/j.biomaterials.2023.122038] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/20/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
Proteolysis-targeting chimeras (PROTACs) have recently been of great interest in cancer therapy. However, the bioavailability of PROTACs is considerably restricted due to their high hydrophobicity, poor cell permeability, and thereby low tumor targeting ability. Herein, esterase-cleavable maleimide linker (ECMal)-conjugated bromodomain 4 (BRD4)-degrading PROTAC (ECMal-PROTAC) is newly synthesized to exploit plasma albumin as an 'innate drug carrier' that can be accumulated in targeted tumor tissues. The BRD4-degrading ECMal-PROTAC is spontaneously bound to albumins via the thiol-maleimide click chemistry and its esterase-specific cleavage of ECMal-PROTAC is characterized in physiological conditions. The albumin-bound ECMal-PROTACs (Alb-ECMal-PROTACs) have an average size of 6.99 ± 1.38 nm, which is similar to that of free albumins without denaturation or aggregation. When Alb-ECMal-PROTACs are treated to 4T1 tumor cells, they are actively endocytosed and reach their highest intracellular level within 12 h. Furthermore, the maleimide linkers of Alb-ECMal-PROTACs are cleaved by the esterase to release free BRD-4 degrading PROTACs and the cell-internalized PROTACs successfully catalyze the selective degradation of BRD4 proteins, resulting in BRD4 deficiency-related apoptosis. When ECMal-PROTACs are intravenously injected into tumor-bearing mice, they exhibit a 16.3-fold higher tumor accumulation than free BRD4-PROTAC, due to the shuttling effect of albumin for tumor targeting. Finally, ECMal-PROTACs show 5.3-fold enhanced antitumor efficacy compared to free BRD4-PROTAC, without provoking any severe systemic toxicity. The expression of Bcl-2 and c-Myc, the downstream oncogenic proteins of BRD4, are also effectively suppressed. In summary, the in situ albumin binding of ECMal-PROTAC is proven as a promising strategy that effectively modulates its pharmacokinetics and therapeutic performance with high applicability to other types of PROTACs.
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Affiliation(s)
- Hanhee Cho
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seong Ik Jeon
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Man Kyu Shim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kwangmeyung Kim
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Republic of Korea.
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Jo S, Sun IC, Ahn CH, Lee S, Kim K. Recent Trend of Ultrasound-Mediated Nanoparticle Delivery for Brain Imaging and Treatment. ACS Appl Mater Interfaces 2023; 15:120-137. [PMID: 35184560 DOI: 10.1021/acsami.1c22803] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In view of the fact that the blood-brain barrier (BBB) prevents the transport of imaging probes and therapeutic agents to the brain and thus hinders the diagnosis and treatment of brain-related disorders, methods of circumventing this problem (e.g., ultrasound-mediated nanoparticle delivery) have drawn much attention. Among the related techniques, focused ultrasound (FUS) is a favorite means of enhancing drug delivery via transient BBB opening. Photoacoustic brain imaging relies on the conversion of light into heat and the detection of ultrasound signals from contrast agents, offering the benefits of high resolution and large penetration depth. The extensive versatility and adjustable physicochemical properties of nanoparticles make them promising therapeutic agents and imaging probes, allowing for successful brain imaging and treatment through the combined action of ultrasound and nanoparticulate agents. FUS-induced BBB opening enables nanoparticle-based drug delivery systems to efficiently access the brain. Moreover, photoacoustic brain imaging using nanoparticle-based contrast agents effectively visualizes brain morphologies or diseases. Herein, we review the progress in the simultaneous use of nanoparticles and ultrasound in brain research, revealing the potential of ultrasound-mediated nanoparticle delivery for the effective diagnosis and treatment of brain disorders.
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Affiliation(s)
- SeongHoon Jo
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Republic of Korea
| | - In-Cheol Sun
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul08826, Republic of Korea
| | - Sangmin Lee
- Department of Pharmacy, College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul02447, Korea
| | - Kwangmeyung Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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Jeon SI, Kim HJ, Lee JH, Ahn CH. Development of a Hypoxia-Sensitive Material Producing Fluorescence and Ultrasound Signals. Macromol Res 2022. [DOI: 10.1007/s13233-022-0100-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cho H, Shim MK, Moon Y, Song S, Kim J, Choi J, Kim J, Lee Y, Park JY, Kim Y, Ahn CH, Kim MR, Yoon HY, Kim K. Tumor-Specific Monomethyl Auristatin E (MMAE) Prodrug Nanoparticles for Safe and Effective Chemotherapy. Pharmaceutics 2022; 14:pharmaceutics14102131. [PMID: 36297566 PMCID: PMC9609178 DOI: 10.3390/pharmaceutics14102131] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/01/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022] Open
Abstract
A prodrug is bioreversible medication that is specifically converted to the active drugs by enzymes overexpressed in the tumor microenvironment, which can considerably reduce the chemotherapy-induced side effects. However, prodrug strategies usually have low antitumor efficacy compared to free drugs by delayed drug release. This is because they need time to be activated by enzymatic cleavage and they also cannot be fully recovered to the active drugs. Therefore, highly potent anticancer drug should be considered to expect a sufficient antitumor efficacy. Herein, we propose tumor-specific monomethyl auristatin E (MMAE) prodrug nanoparticles for safe and effective chemotherapy. The cathepsin B-specific cleavable FRRG peptide and MMAE are chemically conjugated via one-step simple synthetic chemistry. The resulting FRRG-MMAE molecules form stable nanoparticles without any additional carrier materials by hydrophobic interaction-derived aggregations. The FRRG-MMAE nanoparticles efficiently accumulate within the tumor tissues owing to the enhanced permeability and retention (EPR) effect and inhibit the tubulin polymerization by releasing free MMAE in the cathepsin B-overexpressed tumor cells. In contrast, FRRG-MMAE nanoparticles maintain a non-toxic inactive state in the normal tissues owing to innately low cathepsin B expression, thereby reducing MMAE-related severe toxicity. Collectively, this study provides a promising approach for safe and effective chemotherapy via MMAE-based prodrug nanoparticles, which may open new avenues for advanced drug design for translational nanomedicine.
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Affiliation(s)
- Hanhee Cho
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Man Kyu Shim
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Yujeong Moon
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Sukyung Song
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Jinseong Kim
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jiwoong Choi
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jeongrae Kim
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Youngjoo Lee
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Jung Yeon Park
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Department of Integrative Energy Engineering, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Yongju Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
- Department of Integrative Energy Engineering, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Cheol-Hee Ahn
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Mi Ra Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Haeundae Paik Hospital, College of Medicine, Inje University, Busan 48108, Korea
| | - Hong Yeol Yoon
- Biomedical Research Division, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Kwangmeyung Kim
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, Seoul 03760, Korea
- Correspondence:
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Yun WS, Park JH, Lim DK, Ahn CH, Sun IC, Kim K. How Did Conventional Nanoparticle-Mediated Photothermal Therapy Become "Hot" in Combination with Cancer Immunotherapy? Cancers (Basel) 2022; 14:cancers14082044. [PMID: 35454950 PMCID: PMC9029053 DOI: 10.3390/cancers14082044] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 03/30/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 01/27/2023] Open
Abstract
Simple Summary Photothermal therapy (PTT) has become effective through the development of nanoparticle-based photoabsorbers with various functions, such as targeting properties, high light-to-heat conversion, and photostability. Conventional nanoparticle-mediated PTT has attained localized efficiency in cancer treatment by heat-induced apoptosis or necrosis of cancer cells. Currently, such treatment methods evolve into cancer immunotherapy through the induction of immunogenic cell death (ICD). Damage-associated molecular patterns from dead cells by nanoparticle-mediated PTT activate immune cells for systemic anti-cancer effect. In this review, we investigate various nanoparticle-based PTT and compare its methodology to clarify how it undergoes a transition from thermotherapy to immunotherapy. Abstract One of the promising cancer treatment methods is photothermal therapy (PTT), which has achieved good therapeutic efficiency through nanoparticle-based photoabsorbers. Because of the various functions of nanoparticles, such as targeting properties, high light-to-heat conversion, and photostability, nanoparticle-mediated PTT successfully induces photothermal damage in tumor tissues with minimal side effects on surrounding healthy tissues. The therapeutic efficacy of PTT originates from cell membrane disruption, protein denaturation, and DNA damage by light-induced heat, but these biological impacts only influence localized tumor areas. This conventional nanoparticle-mediated PTT still attracts attention as a novel cancer immunotherapy, because PTT causes immune responses against cancer. PTT-induced immunogenic cell death activates immune cells for systemic anti-cancer effect. Additionally, the excellent compatibility of PTT with other treatment methods (e.g., chemotherapy and immune checkpoint blockade therapy) reinforces the therapeutic efficacy of PTT as combined immunotherapy. In this review, we investigate various PTT agents of nanoparticles and compare their applications to reveal how nanoparticle-mediated PTT undergoes a transition from thermotherapy to immunotherapy.
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Affiliation(s)
- Wan Su Yun
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seoul 02841, Korea; (W.S.Y.); (D.-K.L.)
| | - Ji-Ho Park
- NanoBio Materials Laboratory, Department of Materials Science and Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Korea; (J.-H.P.); (C.-H.A.)
| | - Dong-Kwon Lim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seoul 02841, Korea; (W.S.Y.); (D.-K.L.)
| | - Cheol-Hee Ahn
- NanoBio Materials Laboratory, Department of Materials Science and Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Korea; (J.-H.P.); (C.-H.A.)
| | - In-Cheol Sun
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, 5, Seoul 02792, Korea
- Correspondence: (I.-C.S.); (K.K.)
| | - Kwangmeyung Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seoul 02841, Korea; (W.S.Y.); (D.-K.L.)
- Medicinal Materials Research Center, Biomedical Research Division, Korea Institute of Science and Technology, 5, Seoul 02792, Korea
- Correspondence: (I.-C.S.); (K.K.)
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Kim JH, Kim MS, Kim HJ, Kim JR, Ahn CH. Novel Potentially Biobased Copolyesters Comprising 1,3-Butanediol, 1,4-Cyclohexanedimethanol and Dimethyl Terephthalate; Effect of Different Catalysts on Polymerization Behavior. Macromol Res 2022. [DOI: 10.1007/s13233-022-0008-x] [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: 11/30/2022]
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9
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Jung J, Ku J, Park YS, Ahn CH, Lee JH, Hwang SS, Lee AS. Advances in Ion Conducting Membranes and Binders for High Temperature Polymer Electrolyte Membrane Fuel Cells. POLYM REV 2022. [DOI: 10.1080/15583724.2022.2025602] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jiyoon Jung
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Jinsuk Ku
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Young Sang Park
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Jung-Hyun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Seung Sang Hwang
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Albert S. Lee
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
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Cho H, Shim MK, Yang S, Song S, Moon Y, Kim J, Byun Y, Ahn CH, Kim K. Cathepsin B-Overexpressed Tumor Cell Activatable Albumin-Binding Doxorubicin Prodrug for Cancer-Targeted Therapy. Pharmaceutics 2021; 14:83. [PMID: 35056979 PMCID: PMC8780658 DOI: 10.3390/pharmaceutics14010083] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 11/18/2021] [Revised: 12/20/2021] [Accepted: 12/24/2021] [Indexed: 11/18/2022] Open
Abstract
Prodrugs are bioreversible medications that should undergo an enzymatic or chemical transformation in the tumor microenvironment to release active drugs, which improve cancer selectivity to reduce toxicities of anticancer drugs. However, such approaches have been challenged by poor therapeutic efficacy attributed to a short half-life and low tumor targeting. Herein, we propose cathepsin B-overexpressed tumor cell activatable albumin-binding doxorubicin prodrug, Al-ProD, that consists of a albumin-binding maleimide group, cathepsin B-cleavable peptide (FRRG), and doxorubicin. The Al-ProD binds to in situ albumin, and albumin-bound Al-ProD indicates high tumor accumulation with prolonged half-life, and selctively releases doxorubicin in cathepsin B-overexpressed tumor cells, inducing a potent antitumor efficacy. Concurrently, toxicity of Al-ProD toward normal tissues with innately low cathepsin B expression is significantly reduced by maintaining an inactive state, thereby increasing the safety of chemotherapy. This study offers a promising approach for effective and safe chemotherapy, which may open new avenues for drug design and translational medicine.
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Affiliation(s)
- Hanhee Cho
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Man Kyu Shim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
| | - Suah Yang
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Sukyung Song
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- Department of Biosystems & Biotechnology, Korea University, Seoul 02841, Korea
| | - Yujeong Moon
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- Department of Bioengineering, Korea University, Seoul 02841, Korea
| | - Jinseong Kim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
| | - Youngro Byun
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea;
| | - Cheol-Hee Ahn
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Kwangmeyung Kim
- Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (H.C.); (M.K.S.); (S.Y.); (S.S.); (Y.M.); (J.K.)
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea
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Jeon SI, Kim MS, Kim HJ, Kim YI, Jae HJ, Ahn CH. Biodegradable poly(lactide-co-glycolide) microspheres encapsulating hydrophobic contrast agents for transarterial chemoembolization. J Biomater Sci Polym Ed 2021; 33:409-425. [PMID: 34613885 DOI: 10.1080/09205063.2021.1990472] [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] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Transarterial chemoembolization (TACE) is a therapeutic approach to address hepatocellular carcinoma by obstructing the blood supply to the tumor using embolic agents and improving the local delivery of anticancer agents. Size-calibrated polymeric microspheres (MSs) termed drug-eluting beads (DEBs) are the most prevalent solid embolic materials; however, their limitations include insufficient X-ray visibility or biodegradability. In this study, size-controlled polymeric MSs with inherent radiopacity and biodegradability were created, and their embolic effect was assessed. Poly(lactide-co-glycolide) MSs (PLGA MSs) incorporating a hydrophobic X-ray contrast agent and an anticancer drug were produced by the w/o/w emulsion process. Their sizes were exactly calibrated to 71.40 ± 32.18 and 142.66 ± 59.92 μm in diameter, respectively, which were confirmed to have sizes similar to the clinically available DEBs. The iodine content of PLGA MSs was calculated as 144 mgI/g, and the loading quantity of the drug was 1.33%. Manufactured PLGA MSs were gradually degraded for 10 weeks and consistently released the anticancer drug. Following the PLGA MSs injection into the renal artery of New Zealand white rabbit test subjects, their deliverability to the targeted vessel through the microcatheter was confirmed. Injected PLGA MSs were clearly imaged through the real-time X-ray device without blending any contrast agents. The embolic effect of the PLGA MSs was ultimately established by the atrophy of an embolized kidney after 8 weeks. Consequently, the designed PLGA MS is anticipated to be an encouraging prospect to address hepatocellular carcinoma.
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Affiliation(s)
- Seong Ik Jeon
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Moo Song Kim
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Hyung Jun Kim
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | | | - Hwan Jun Jae
- Department of Radiology, Seoul National University College of Medicine, Institute of Radiation Medicine, Seoul National University Medical Research Center, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
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Jo S, Sun IC, Yun WS, Kim J, Lim DK, Ahn CH, Kim K. Thiol-Responsive Gold Nanodot Swarm with Glycol Chitosan for Photothermal Cancer Therapy. Molecules 2021; 26:5980. [PMID: 34641524 PMCID: PMC8512322 DOI: 10.3390/molecules26195980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Received: 08/26/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 11/17/2022] Open
Abstract
Photothermal therapy (PTT) is one of the most promising cancer treatment methods because hyperthermal effects and immunogenic cell death via PTT are destructive to cancer. However, PTT requires photoabsorbers that absorb near-infrared (NIR) light with deeper penetration depth in the body and effectively convert light into heat. Gold nanoparticles have various unique properties which are suitable for photoabsorbers, e.g., controllable optical properties and easy surface modification. We developed gold nanodot swarms (AuNSw) by creating small gold nanoparticles (sGNPs) in the presence of hydrophobically-modified glycol chitosan. The sGNPs assembled with each other through their interaction with amine groups of glycol chitosan. AuNSw absorbed 808-nm laser and increased temperature to 55 °C. In contrast, AuNSw lost its particle structure upon exposure to thiolated molecules and did not convert NIR light into heat. In vitro studies demonstrated the photothermal effect and immunogenic cell death after PTT with AuNSW. After intratumoral injection of AuNSw with laser irradiation, tumor growth of xenograft mouse models was depressed. We found hyperthermal damage and immunogenic cell death in tumor tissues through histological and biochemical analyses. Thiol-responsive AuNSw showed feasibility for PTT, with advanced functionality in the tumor microenvironment.
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Affiliation(s)
- SeongHoon Jo
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Korea; (S.J.); (I.-C.S.)
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - In-Cheol Sun
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Korea; (S.J.); (I.-C.S.)
| | - Wan Su Yun
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (W.S.Y.); (J.K.); (D.-K.L.)
| | - Jinseong Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (W.S.Y.); (J.K.); (D.-K.L.)
| | - Dong-Kwon Lim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (W.S.Y.); (J.K.); (D.-K.L.)
| | - Cheol-Hee Ahn
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Kwangmeyung Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro, Seongbuk-gu, Seoul 02792, Korea; (S.J.); (I.-C.S.)
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (W.S.Y.); (J.K.); (D.-K.L.)
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Chung IJ, Moon H, Jeon SI, Lee HJ, Ahn CH. Ultrasound-triggered imaging and drug delivery using microbubble-self-aggregate complexes. J Biomater Sci Polym Ed 2021; 33:57-76. [PMID: 34503403 DOI: 10.1080/09205063.2021.1976362] [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] [Indexed: 10/20/2022]
Abstract
Co-delivery of microbubbles (MBs) with anticancer drugs is a promising theranostic approach that can enhance both the ultrasound contrast and local extravasation of drugs with the sonoporation effect. The simultaneous administration of MBs and hydrophobic drugs, however, is still challenging due to the limitations in drug loading or undesirable stabilization of MBs. In this research, MB-self-aggregate complexes (MB-SAs) were newly fabricated for the encapsulation of hydrophobic drugs, and their theranostic properties are investigated in vitro and in vivo. Glycol chitosan self-aggregates (GC-SAs) loaded with hydrophobic drugs or dyes were chemically conjugated on the surface MBs. Their conjugation ratio was determined to be 73.9%, and GC-SAs on MBs did not affect the stability of MBs. GC-SA attached MBs (GC@MBs) were successfully visualized with low-intensity insonation and showed enhanced cellular uptake via the sonoporation effect. In vivo biodistribution of GC@MBs was examined with tumor-bearing mice, confirming that their accumulation at the tumor site increased by 1.85 times after ultrasound irradiation. The anticancer drug-loaded GC@MBs also exhibited 10% higher cytotoxicity under ultrasound flash. In conclusion, it was expected that GC@MBs could be used both as an ultrasound contrast agent and a drug carrier even with conventional ultrasonic devices.
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Affiliation(s)
- In Jae Chung
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-gu, Seoul, Korea
| | | | - Seong Ik Jeon
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-gu, Seoul, Korea
| | - Hak Jong Lee
- IMGT Co., Ltd, Seongnam, Korea.,Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Cheol-Hee Ahn
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-gu, Seoul, Korea
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Lee SY, Jeon SI, Sim SB, Byun Y, Ahn CH. A supramolecular host-guest interaction-mediated injectable hydrogel system with enhanced stability and sustained protein release. Acta Biomater 2021; 131:286-301. [PMID: 34246803 DOI: 10.1016/j.actbio.2021.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 04/21/2021] [Revised: 06/11/2021] [Accepted: 07/01/2021] [Indexed: 11/15/2022]
Abstract
Injectable hydrogels have been studied as drug delivery systems because of their minimal invasiveness and sustained drug release properties. Pluronic F127, consisting of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers, exhibits thermo-responsive properties and hence is injectable due to its rapid sol-gel transition. Unmodified Pluronic F127-based hydrogels, however, have limited long-term stability and controllable release of drugs entrapped within them. In this study, host-guest interactions between adamantane-conjugated Pluronic F127 (F127-Ad) and polymerized β-cyclodextrin (CDP) were employed to develop a hydrogel-based protein delivery system. Single or multiple adamantane units were successfully introduced at the termini of Pluronic F127 with a 100% conversion yield, and the synthesized F127-Ad polymer produced a physically crosslinked micelle-packing structure when mixed with CDP. As the number of adamantanes at the terminal ends of Pluronic F127 increased, the critical gelation concentration of F127-Ad/CDP hydrogel decreased from 15 to 6% (w/v). The F127/CDP hydrogel was able to maintain its structure even with lower polymer content, and its injectability improved with a reduction of the hydrogel viscosity. The long-term stability of F127/CDP hydrogels was evaluated in vitro and in vivo, and it was demonstrated that the subcutaneously injected hydrogel did not disintegrate for up to 30 d. Throughout the drug release test using gelatin and insulin as model drugs, it was demonstrated that their release rates could be regulated via complexation between the protein drugs and the β-cyclodextrin molecules inside the hydrogel. In conclusion, the F127-Ad/CDP hydrogel is expected to be a versatile protein delivery system with controllable durability and drug release characteristics. STATEMENT OF SIGNIFICANCE: Pluronic F127 is one of the widely studied polymeric materials for thermo-sensitive injectable hydrogels due to its high biocompatibility and rapid sol-gel transition. Since the Pluronic F127-based hydrogel has some limitations in its long-term stability and mechanical property, it is inevitable to modify its structure for the application to drug delivery. In this study, mono- or multi- adamantane-conjugated Pluronic F127s were synthesized and mixed with β-cyclodextrin polymers to form hydrogels with host-guest interaction-mediated micelle-packing structures. The host-guest interaction introduced into the hydrogel system endowed it a sustained protein drug release behavior as well as high durability in vitro and in vivo. By increasing the number of adamantane molecules at the end of the Pluronic F127, both the stability and injectability of the hydrogel could be also modulated.
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Affiliation(s)
- Seung Yong Lee
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seong Ik Jeon
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sung Bo Sim
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Youngro Byun
- Research Institute of Pharmaceutical Science, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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Joh S, Na HK, Son JG, Lee AY, Ahn CH, Ji DJ, Wi JS, Jeong MS, Lee SG, Lee TG. Quantitative Analysis of Immunosuppressive Drugs Using Tungsten Disulfide Nanosheet-Assisted Laser Desorption Ionization Mass Spectrometry. ACS Nano 2021; 15:10141-10152. [PMID: 34097394 DOI: 10.1021/acsnano.1c02016] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 06/12/2023]
Abstract
For organ transplantation patients, the therapeutic drug monitoring (TDM) of immunosuppressive drugs is essential to prevent the toxicity or rejection of the organ. Currently, TDM is done by immunoassays or liquid chromatography-tandem mass spectrometry (LC-MS/MS) methods; however, these methods lack specificity or are expensive, require high levels of skill, and offer limited sample throughput. Although matrix-assisted (MA) laser desorption ionization (LDI) mass spectrometry (MS) can provide enhanced throughput and cost-effectiveness, its application in TDM is limited due to the limitations of the matrixes such as a lack of sensitivity and reproducibility. Here, we present an alternative quantification method for the TDM of the immunosuppressive drugs in the blood of organ transplant patients by utilizing laser desorption ionization mass spectrometry (LDI-MS) based on a tungsten disulfide nanosheet, which is well-known for its excellent physicochemical properties such as a strong UV absorbance and high electron mobility. By adopting a microliquid inkjet printing system, a high-throughput analysis of the blood samples with enhanced sensitivity and reproducibility was achieved. Furthermore, up to 80 cases of patient samples were analyzed and the results were compared with those of LC-MS/MS by using Passing-Bablok regression and Bland-Altman analysis to demonstrate that our LDI-MS platform is suitable to replace current TDM techniques. Our approach will facilitate the rapid and accurate analysis of blood samples from a large number of patients for immunosuppressive drug prescriptions.
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Affiliation(s)
- Sunho Joh
- Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
- Department of Nano Science, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Hee-Kyung Na
- Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
| | - Jin Gyeong Son
- Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
| | - A Young Lee
- Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
| | - Cheol-Hee Ahn
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Da-Jeong Ji
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jung-Sub Wi
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Korea
| | - Mun Seok Jeong
- Department of Physics, Hanyang University, Seoul 04763, Korea
| | - Sang-Guk Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Tae Geol Lee
- Safety Measurement Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
- Department of Nano Science, University of Science and Technology (UST), Daejeon 34113, Korea
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Jeon SI, Jeong JH, Kim JE, Haque MR, Kim J, Byun Y, Ahn CH. Synthesis of PEG-dendron for surface modification of pancreatic islets and suppression of the immune response. J Mater Chem B 2021; 9:2631-2640. [PMID: 33683280 DOI: 10.1039/d1tb00069a] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Islet cell transplantation has been an effective method for the treatment of type 1 diabetes. The transplanted islets release insulin in response to changes in blood glucose levels. The clinical application of islet transplantation, however, has been hindered because of some critical problems including immune responses to grafted islets and side effects caused by overdosed immunosuppressive drugs. Herein, surface modification technology using poly(ethylene glycol) (PEG)-dendron was proposed to safeguard islets from the host immune system. PEG-dendron was synthesized by a divergent polymerization method and utilized to cover the islet antigen surface. Successful conjugation of PEG-dendron on the islet surface was achieved without affecting islet morphology, viability, and functionality at a concentration of 1.00%. Surface modification using PEG-dendron effectively prevented protein absorption and immune activation. Foremost, it improved the survival rate of islet grafts in vivo when combined with a low dose of immunosuppressive drugs. In conclusion, PEG-dendron is a potential candidate for the surface modification of pancreatic islets to mitigate immune responses after transplantation.
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Affiliation(s)
- Seong Ik Jeon
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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Lee JH, Yoo YM, Jung EM, Ahn CH, Jeung EB. Inhibitory effect of octyl-phenol and bisphenol A on calcium signaling in cardiomyocyte differentiation of mouse embryonic stem cells. J Physiol Pharmacol 2019; 70. [PMID: 31566189 DOI: 10.26402/jpp.2019.3.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 06/28/2019] [Indexed: 11/03/2022]
Abstract
Endocrine-disrupting chemicals (EDCs) have structures similar to steroid hormones and can interfere with hormone synthesis and normal physiological functions of reproductive organs. For example, sex steroid hormones influence calcium signaling of the cardiac muscle in early embryo development. To confirm the effect of progesterone (P4), octyl-phenol (OP), and bisphenol A (BPA) on early differentiation of mouse embryonic stem cells (mESCs) into cardiomyocytes, mESCs were treated with P4, OP, and BPA two days after attachment and media were replaced every two days. In addition, cells were treated with mifepristone (RU486), a synthetic steroid that has an affinity for progesterone receptor (Pgr), for one day starting on day 11. Beating ratio was decreased with P4, OP, and BPA treatment. The Pgr mRNA level was significantly increased in the P4-, OP- and BPA-treated groups. However, the mRNA level of the calcium channel gene (Trpv2), contraction-related genes (Ryr2, Cam2, and Mylk3) and cardiac development and morphogenesis genes (Rbp4, Ly6e, and Gata4) were significantly decreased in the P4-, OP-, and BPA-treated groups. Interestingly, treatment with RU486 rescued the altered calcium channel gene, contraction-related genes, and cardiac development and morphogenesis genes. P4, OP, and BPA treatments reduced the intracellular calcium level. Taken together, these results indicate that EDCs (OP and BPA) has a structure similar to that of endogenous steroid hormones such as progesterone and estrogen, and OP and BPA act like progesterone to inhibit and disrupt cardiomyocyte differentiation of mESCs.
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Affiliation(s)
- J-H Lee
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Y-M Yoo
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - E-M Jung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - C H Ahn
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - E-B Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea.
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Sun IC, Ahn CH, Kim K, Emelianov S. Photoacoustic imaging of cancer cells with glycol-chitosan-coated gold nanoparticles as contrast agents. J Biomed Opt 2019; 24:1-5. [PMID: 31385483 PMCID: PMC6680094 DOI: 10.1117/1.jbo.24.12.121903] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/11/2019] [Indexed: 05/07/2023]
Abstract
Utility of glycol-chitosan-coated gold nanoparticles (GC-AuNPs) as a photoacoustic contrast agent for cancer cell imaging was demonstrated. Through the synergistic effect of glycol chitosan and gold nanoparticles, GC-AuNPs showed cellular uptake in breast cancer cells and resulted in strong photoacoustic signals in tissue-mimicking cell phantoms. The performance of GC-AuNPs as contrast agents was established with photoacoustic imaging and confirmed with dark-field microscopy. The cell phantoms displayed strong photoacoustic signals if cells were incubated more than 3 h with GC-AuNPs, compared with PEG-AuNPs that showed no photoacoustic signal increase. The enhanced photoacoustic signals originated from the plasmon coupling effect of GC-AuNPs after the cellular uptake in cancer cells. Importantly, photoacoustic imaging of cancer cells was achieved with GC-AuNPs—contrast agents that did not require antibodies or complex surface modification. The endocytosis of GC-AuNPs was also confirmed with dark-field microscopy. The results show that GC-AuNPs have potential as a photoacoustic contrast agent for cellular imaging including tumor tissue imaging.
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Affiliation(s)
- In-Cheol Sun
- Georgia Institute of Technology, School of Electrical and Computer Engineering Atlanta, Georgia, United States
- Georgia Institute of Technology and Emory University School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
| | - Cheol-Hee Ahn
- Seoul National University, NanoBio Materials Laboratory, Department of Materials Science and Engineering, Seoul, Republic of Korea
| | - Kwangmeyung Kim
- Korea Institute of Science and Technology, Biomedical Research Institute, Seoul, Republic of Korea
| | - Stanislav Emelianov
- Georgia Institute of Technology, School of Electrical and Computer Engineering Atlanta, Georgia, United States
- Georgia Institute of Technology and Emory University School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
- Address all correspondence to Stanislav Emelianov, E-mail:
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Oh I, Jeon SI, Chung IJ, Ahn CH. Self-Healable Dielectric Polydimethylsiloxane Composite Based on Zinc-Imidazole Coordination Bond. Macromol Res 2019. [DOI: 10.1007/s13233-019-7147-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rodriguez J, Chandorkar SA, Watson CA, Glaze GM, Ahn CH, Ng EJ, Yang Y, Kenny TW. Direct Detection of Akhiezer Damping in a Silicon MEMS Resonator. Sci Rep 2019; 9:2244. [PMID: 30783192 PMCID: PMC6381092 DOI: 10.1038/s41598-019-38847-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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: 06/07/2018] [Accepted: 12/11/2018] [Indexed: 11/13/2022] Open
Abstract
Silicon Microelectromechanical Systems (MEMS) resonators have broad commercial applications for timing and inertial sensing. However, the performance of MEMS resonators is constrained by dissipation mechanisms, some of which are easily detected and well-understood, but some of which have never been directly observed. In this work, we present measurements of the quality factor, Q, for a family of single crystal silicon Lamé-mode resonators as a function of temperature, from 80–300 K. By comparing these Q measurements on resonators with variations in design, dimensions, and anchors, we have been able to show that gas damping, thermoelastic dissipation, and anchor damping are not significant dissipation mechanisms for these resonators. The measured f · Q product for these devices approaches 2 × 1013, which is consistent with the expected range for Akhiezer damping, and the dependence of Q on temperature and geometry is consistent with expectations for Akhiezer damping. These results thus provide the first clear, direct detection of Akhiezer dissipation in a MEMS resonator, which is widely considered to be the ultimate limit to Q in silicon MEMS devices.
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Affiliation(s)
- Janna Rodriguez
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA.
| | - Saurabh A Chandorkar
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
| | - Christopher A Watson
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California, 94025, USA
| | - Grant M Glaze
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
| | - C H Ahn
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
| | - Eldwin J Ng
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
| | - Yushi Yang
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
| | - Thomas W Kenny
- Department of Mechanical Engineering, Stanford University, Stanford, California, 95304, USA
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22
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Kim JH, Kim JR, Ahn CH. Novel biobased copolyesters based on 1,2-propanediol or 2,3-butanediol with the same ethylene skeletal structure as PETG. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.12.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Pathak S, Regmi S, Gupta B, Poudel BK, Pham TT, Yong CS, Kim JO, Kim JR, Park MH, Bae YK, Yook S, Ahn CH, Jeong JH. Single synchronous delivery of FK506-loaded polymeric microspheres with pancreatic islets for the successful treatment of streptozocin-induced diabetes in mice. Drug Deliv 2017; 24:1350-1359. [PMID: 28911248 PMCID: PMC8241191 DOI: 10.1080/10717544.2017.1377317] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Immune rejection after transplantation is common, which leads to prompt failure of the graft. Therefore, to prolong the survival time of the graft, immunosuppressive therapy is the norm. Here, we report a robust immune protection protocol using FK506-loaded microspheres (FK506M) in injectable hydrogel. Pancreatic islets were codelivered with the FK506M into the subcutaneous space of streptozocin-induced diabetic mice. The islets codelivered with 10 mg/kg FK506M maintained normal blood glucose levels during the study period (survival rate: 60%). However, transplantation of islets and FK506M at different sites hardly controlled the blood glucose level (survival rate: 20%). Immunohistochemical analysis revealed an intact morphology of the islets transplanted with FK506M. In addition, minimal number of immune cells invaded inside the gel of the islet-FK506M group. The single injection of FK506M into the local microenvironment effectively inhibited immune rejection and prolonged the survival time of transplanted islets in a xenograft model.
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Affiliation(s)
- Shiva Pathak
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Shobha Regmi
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Biki Gupta
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Bijay K Poudel
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Tung Thanh Pham
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Chul Soon Yong
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Jong Oh Kim
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
| | - Jae-Ryong Kim
- b Department of Biochemistry and Molecular Biology and Smart-Aging Convergence Research Center , College of Medicine, Yeungnam University , Daegu , Republic of Korea
| | - Min Hui Park
- c Department of Pathology , Yeungnam University College of Medicine , Daegu , Republic of Korea
| | - Young Kyung Bae
- c Department of Pathology , Yeungnam University College of Medicine , Daegu , Republic of Korea
| | - Simmyung Yook
- d College of Pharmacy , Keimyung University , Daegu , Republic of Korea
| | - Cheol-Hee Ahn
- e Engineering Research Institute, Department of Materials Science and Engineering , Seoul National University , Seoul , Republic of Korea
| | - Jee-Heon Jeong
- a College of Pharmacy , Yeungnam University , Gyeongsan , Gyeongbuk , Republic of Korea
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Lee S, Jung S, Koo H, Na JH, Yoon HY, Shim MK, Park J, Kim JH, Lee S, Pomper MG, Kwon IC, Ahn CH, Kim K. Nano-sized metabolic precursors for heterogeneous tumor-targeting strategy using bioorthogonal click chemistry in vivo. Biomaterials 2017; 148:1-15. [DOI: 10.1016/j.biomaterials.2017.09.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/03/2017] [Accepted: 09/18/2017] [Indexed: 01/22/2023]
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Kwon SP, Jeon S, Lee SH, Yoon HY, Ryu JH, Choi D, Kim JY, Kim J, Park JH, Kim DE, Kwon IC, Kim K, Ahn CH. Thrombin-activatable fluorescent peptide incorporated gold nanoparticles for dual optical/computed tomography thrombus imaging. Biomaterials 2017; 150:125-136. [PMID: 29035738 DOI: 10.1016/j.biomaterials.2017.10.017] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [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: 05/03/2017] [Revised: 09/03/2017] [Accepted: 10/08/2017] [Indexed: 12/29/2022]
Abstract
Thrombosis is an important pathophysiologic phenomenon in various cardiovascular diseases, which can lead to oxygen deprivation and infarction of tissues by generation of a thrombus. Thus, direct thrombus imaging can provide beneficial in diagnosis and therapy of thrombosis. Herein, we developed thrombin-activatable fluorescent peptide (TAP) incorporated silica-coated gold nanoparticles (TAP-SiO2@AuNPs) for direct imaging of thrombus by dual near-infrared fluorescence (NIRF) and micro-computed tomography (micro-CT) imaging, wherein TAP molecules were used as targeted thrombin-activatable peptide probes for thrombin-specific NIRF imaging. The freshly prepared TAP-SiO2@AuNPs had an average diameter of 39.8 ± 2.55 nm and they showed the quenched NIRF signal in aqueous condition, due to the excellent quenching effect of TAP molecules on the silica-gold nanoparticle surface. However, 30.31-fold higher NIRF intensity was rapidly recovered in the presence of thrombin in vitro, due to the thrombin-specific cleavage of quenched TAP molecules on the gold particle surface. Furthermore, TAP-SiO2@AuNPs were successfully accumulated in thrombus by their particle size-dependent capturing property, and they presented a potential X-ray absorption property in a dose-dependent manner. Finally, thrombotic lesion was clearly distinguished from peripheral tissues by dual NIRF/micro-CT imaging after intravenous injection of TAP-SiO2@AuNPs in the in situ thrombotic mouse model, simultaneously. This study showed that thrombin-activatable fluorescent peptide incorporated silica-coated gold nanoparticles can be potentially used as a dual imaging probe for direct thrombus imaging and therapy in clinical applications.
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Affiliation(s)
- Sung-Pil Kwon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea; Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sangmin Jeon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea; School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
| | - Sung-Hoon Lee
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea; Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hong Yeol Yoon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea
| | - Ju Hee Ryu
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea
| | - Dayil Choi
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea
| | - Jeong-Yeon Kim
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine, Goyang, 10326, Republic of Korea
| | - Jiwon Kim
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine, Goyang, 10326, Republic of Korea
| | - Jae Hyung Park
- School of Chemical Engineering, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
| | - Dong-Eog Kim
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine, Goyang, 10326, Republic of Korea
| | - Ick Chan Kwon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea; KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Kwangmeyung Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul, 136-791, Republic of Korea; KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
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Haque MR, Kim J, Park H, Lee HS, Lee KW, Al-Hilal TA, Jeong JH, Ahn CH, Lee DS, Kim SJ, Byun Y. Xenotransplantation of layer-by-layer encapsulated non-human primate islets with a specified immunosuppressive drug protocol. J Control Release 2017; 258:10-21. [DOI: 10.1016/j.jconrel.2017.04.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/14/2017] [Indexed: 12/21/2022]
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Kim DE, Kim JY, Schellingerhout D, Ryu JH, Lee SK, Jeon S, Lee JS, Kim J, Jang HJ, Park JE, Kim EJ, Kwon IC, Ahn CH, Nahrendorf M, Kim K. Quantitative Imaging of Cerebral Thromboemboli In Vivo. Stroke 2017; 48:1376-1385. [DOI: 10.1161/strokeaha.117.016511] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/01/2017] [Accepted: 02/09/2017] [Indexed: 01/21/2023]
Abstract
Background and Purpose—
Quantitative imaging for the noninvasive assessment of thrombolysis is needed to advance basic and clinical thrombosis-related research and tailor tissue-type plasminogen activator (tPA) treatment for stroke patients. We quantified the evolution of cerebral thromboemboli using fibrin-targeted glycol chitosan–coated gold nanoparticles and microcomputed tomography, with/without tPA therapy.
Methods—
We injected thrombi into the distal internal carotid artery in mice (n=50). Fifty-five minutes later, we injected fibrin-targeted glycol chitosan–coated gold nanoparticles, and 5 minutes after that, we treated animals with tPA or not (25 mg/kg). We acquired serial microcomputed tomography images for 24 hours posttreatment.
Results—
Thrombus burden at baseline was 784×10
3
±59×10
3
μm
2
for the tPA group (n=42) and 655×10
3
±103×10
3
μm
2
for the saline group (n=8;
P
=0.37). Thrombus shrinkage began at 0.5 to 1 hour after tPA therapy, with a maximum initial rate of change at 4603±957 μm
2
/min. The rate of change lowered to ≈61% level of the initial in hours 1 to 2, followed by ≈29% and ≈1% in hours 2 to 3 and 3 to 24, respectively. Thus, 85% of total thrombolysis over 24 hours (≈500 μm
2
, equivalent to 64% of the baseline thrombus burden) occurred within the first 3 hours of treatment. Thrombus burden at 24 hours could be predicted at around 1.5 to 2 hours. Saline treatment was not associated with significant changes in the thrombus burden. Infarct size was smaller in the tPA group versus saline group (18.1±2.3 versus 45.8±3.3 mm
2
;
P
<0.01). Infarct size correlated to final thrombus burden (
r
=0.71;
P
<0.01). Time to thrombolysis, completeness of thrombolysis, and tPA therapy were independent predictors of infarct size.
Conclusions—
Thromboembolic burden and the efficacy of tPA therapy can be assessed serially, noninvasively, and quantitatively using high-resolution microcomputed tomography and a fibrin-binding nanoparticle imaging agent.
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Affiliation(s)
- Dong-Eog Kim
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Jeong-Yeon Kim
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Dawid Schellingerhout
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Ju Hee Ryu
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Su-Kyoung Lee
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Sangmin Jeon
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Ji Sung Lee
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Jiwon Kim
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Hee Jeong Jang
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Jung E. Park
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Eo Jin Kim
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Ick Chan Kwon
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Cheol-Hee Ahn
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Matthias Nahrendorf
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
| | - Kwangmeyung Kim
- From Molecular Imaging and Neurovascular Research Laboratory, Departments of Neurology (D.-E.K., J.-Y.K., S.-K.L., J.K., H.J.J., J.E.P.) and Pathology (E.J.K.), Dongguk University College of Medicine, Goyang, South Korea; Biomedical Research Center, Korea Institute of Science and Technology, Seoul, South Korea (J.H.R., S.J., I.C.K., K.K.); Departments of Diagnostic Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center, Houston (D.S.); Clinical Research Center, Asan
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Fabbris G, Meyers D, Okamoto J, Pelliciari J, Disa AS, Huang Y, Chen ZY, Wu WB, Chen CT, Ismail-Beigi S, Ahn CH, Walker FJ, Huang DJ, Schmitt T, Dean MPM. Orbital Engineering in Nickelate Heterostructures Driven by Anisotropic Oxygen Hybridization rather than Orbital Energy Levels. Phys Rev Lett 2016; 117:147401. [PMID: 27740843 DOI: 10.1103/physrevlett.117.147401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Indexed: 06/06/2023]
Abstract
Resonant inelastic x-ray scattering is used to investigate the electronic origin of orbital polarization in nickelate heterostructures taking LaTiO_{3}-LaNiO_{3}-3×(LaAlO_{3}), a system with exceptionally large polarization, as a model system. We find that heterostructuring generates only minor changes in the Ni 3d orbital energy levels, contradicting the often-invoked picture in which changes in orbital energy levels generate orbital polarization. Instead, O K-edge x-ray absorption spectroscopy demonstrates that orbital polarization is caused by an anisotropic reconstruction of the oxygen ligand hole states. This provides an explanation for the limited success of theoretical predictions based on tuning orbital energy levels and implies that future theories should focus on anisotropic hybridization as the most effective means to drive large changes in electronic structure and realize novel emergent phenomena.
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Affiliation(s)
- G Fabbris
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Meyers
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Okamoto
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - J Pelliciari
- Research Department "Synchrotron Radiation and Nanotechnology", Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - A S Disa
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
| | - Y Huang
- Research Department "Synchrotron Radiation and Nanotechnology", Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Z-Y Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - W B Wu
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - C T Chen
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S Ismail-Beigi
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA
| | - C H Ahn
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA
| | - F J Walker
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
| | - D J Huang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
- Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - T Schmitt
- Research Department "Synchrotron Radiation and Nanotechnology", Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - M P M Dean
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, USA
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29
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Kim DE, Kim JY, Lee SK, Ryu JH, Kwon IC, Ahn CH, Kim K, Schellingerhout D. Combined Near-infrared Fluorescent Imaging and Micro-computed Tomography for Directly Visualizing Cerebral Thromboemboli. J Vis Exp 2016. [PMID: 27768026 DOI: 10.3791/54294] [Citation(s) in RCA: 4] [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: 10/31/2022] Open
Abstract
Direct thrombus imaging visualizes the root cause of thromboembolic infarction. Being able to image thrombus directly allows far better investigation of stroke than relying on indirect measurements, and will be a potent and robust vascular research tool. We use an optical imaging approach that labels thrombi with a molecular imaging thrombus marker - a Cy5.5 near-infrared fluorescent (NIRF) probe that is covalently linked to the fibrin strands of the thrombus by the fibrin-crosslinking enzymatic action of activated coagulation factor XIIIa during the process of clot maturation. A micro-computed tomography (microCT)-based approach uses thrombus-seeking gold nanoparticles (AuNPs) functionalized to target the major component of the clot: fibrin. This paper describes a detailed protocol for the combined in vivo microCT and ex vivo NIRF imaging of thromboemboli in a mouse model of embolic stroke. We show that in vivo microCT and fibrin-targeted glycol-chitosan AuNPs (fib-GC-AuNPs) can be used for visualizing both in situ thrombi and cerebral embolic thrombi. We also describe the use of in vivo microCT-based direct thrombus imaging to serially monitor the therapeutic effects of tissue plasminogen activator-mediated thrombolysis. After the last imaging session, we demonstrate by ex vivo NIRF imaging the extent and the distribution of residual thromboemboli in the brain. Finally, we describe quantitative image analyses of microCT and NIRF imaging data. The combined technique of direct thrombus imaging allows two independent methods of thrombus visualization to be compared: the area of thrombus-related fluorescent signal on ex vivo NIRF imaging vs. the volume of hyperdense microCT thrombi in vivo.
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Affiliation(s)
- Dong-Eog Kim
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine;
| | - Jeong-Yeon Kim
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine
| | - Su-Kyoung Lee
- Molecular Imaging and Neurovascular Research Laboratory, Dongguk University College of Medicine
| | - Ju Hee Ryu
- Biomedical Research Center, Korea Institute of Science and Technology
| | - Ick Chan Kwon
- Biomedical Research Center, Korea Institute of Science and Technology
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University
| | - Kwangmeyung Kim
- Biomedical Research Center, Korea Institute of Science and Technology
| | - Dawid Schellingerhout
- Departments of Radiology and Cancer Systems Imaging, University of Texas M.D. Anderson Cancer Center
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30
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Yoon D, Kim H, Lee E, Park MH, Chung S, Jeon H, Ahn CH, Lee K. Study on chemotaxis and chemokinesis of bone marrow-derived mesenchymal stem cells in hydrogel-based 3D microfluidic devices. Biomater Res 2016; 20:25. [PMID: 27489724 PMCID: PMC4971648 DOI: 10.1186/s40824-016-0070-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 05/26/2016] [Accepted: 07/15/2016] [Indexed: 12/23/2022] Open
Abstract
Background Controlling the fate of mesenchymal stems cells (MSCs) including proliferation, migration and differentiation has recently been studied by many researchers in the tissue engineering field. Especially, recruitment of stem cells to injury sites is the first and crucial step in tissue regeneration. Although significant progress has been made in the chemotactic migration of MSCs, MSC migration in three dimensional environments remains largely unknown. We developed a 3D hydrogel-based microfluidic-device to study the migration behavior of human MSCs in the presence of stromal-cell derived factor-1α (SDF-1α), interleukin 8 (IL-8) and Substance P (SP) which have been utilized as chemoattractant candidates of human mesenchymal stem cells (hMSCs). Results We systematically investigated the chemotactic migration behaviors of hMSCs and their responses to SDF-1α, IL-8, and SP. SDF-1α was shown to be the most fascinating chemoattractant candidate among those factors at a certain time point. We also found that each chemokine showed different chemoattractant abilities according to their concentration. In the case of SP, this factor showed chemokinesis not chemotaxis. Especially at a 7–8 × 10−8 M concentration range, the chemokinesis ability driven by SP was further increased. The data suggest that some factors at the optimal concentration exhibit chemokinesis or chemotaxis in a 3D hydrogel-based microfluidic device. Conclusion In this study on chemotaxis and chemokinesis of hMSCs, the system parameters such as chemokine concentration, system stability, and 2D or 3D microenvironment are critically important to obtain meaningful results.
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Affiliation(s)
- Dayoung Yoon
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, Republic of Korea ; Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Hyerim Kim
- Program in Nanoscience and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea
| | - Eojin Lee
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Min Hee Park
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Seok Chung
- School of Mechanical Engineering, Korea University, Seoul, Republic of Korea
| | - Hojeong Jeon
- Center for Biomaterials, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Kangwon Lee
- Program in Nanoscience and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea ; Advanced Institutes of Convergence Technology, Gyeonggi-do, Republic of Korea
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31
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Kumah DP, Dogan M, Ngai JH, Qiu D, Zhang Z, Su D, Specht ED, Ismail-Beigi S, Ahn CH, Walker FJ. Engineered Unique Elastic Modes at a BaTiO_{3}/(2×1)-Ge(001) Interface. Phys Rev Lett 2016; 116:106101. [PMID: 27015492 DOI: 10.1103/physrevlett.116.106101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Indexed: 06/05/2023]
Abstract
The strong interaction at an interface between a substrate and thin film leads to epitaxy and provides a means of inducing structural changes in the epitaxial film. These induced material phases often exhibit technologically relevant electronic, magnetic, and functional properties. The 2×1 surface of a Ge(001) substrate applies a unique type of epitaxial constraint on thin films of the perovskite oxide BaTiO_{3} where a change in bonding and symmetry at the interface leads to a non-bulk-like crystal structure of the BaTiO_{3}. While the complex crystal structure is predicted using first-principles theory, it is further shown that the details of the structure are a consequence of hidden phases found in the bulk elastic response of the BaTiO_{3} induced by the symmetry of forces exerted by the germanium substrate.
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Affiliation(s)
- D P Kumah
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - M Dogan
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - J H Ngai
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - D Qiu
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - Z Zhang
- Argonne National Laboratory, Advanced Photon Source, Argonne, Illinois 60439, USA
| | - D Su
- Brookhaven National Laboratory, Center for Functional Nanomaterials, Upton, New York 11973, USA
| | - E D Specht
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S Ismail-Beigi
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - C H Ahn
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
| | - F J Walker
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA
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Kim JY, Ryu JH, Schellingerhout D, Sun IC, Lee SK, Jeon S, Kim J, Kwon IC, Nahrendorf M, Ahn CH, Kim K, Kim DE. Direct Imaging of Cerebral Thromboemboli Using Computed Tomography and Fibrin-targeted Gold Nanoparticles. Am J Cancer Res 2015. [PMID: 26199648 PMCID: PMC4508499 DOI: 10.7150/thno.11679] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Computed tomography (CT) is the current standard for time-critical decision-making in stroke patients, informing decisions on thrombolytic therapy with tissue plasminogen activator (tPA), which has a narrow therapeutic index. We aimed to develop a CT-based method to directly visualize cerebrovascular thrombi and guide thrombolytic therapy. Glycol-chitosan-coated gold nanoparticles (GC-AuNPs) were synthesized and conjugated to fibrin-targeting peptides, forming fib-GC-AuNP. This targeted imaging agent and non-targeted control agent were characterized in vitro and in vivo in C57Bl/6 mice (n = 107) with FeCl3-induced carotid thrombosis and/or embolic ischemic stroke. Fibrin-binding capacity was superior with fib-GC-AuNPs compared to GC-AuNPs, with thrombi visualized as high density on microCT (mCT). mCT imaging using fib-GC-AuNP allowed the prompt detection and quantification of cerebral thrombi, and monitoring of tPA-mediated thrombolytic effect, which reflected histological stroke outcome. Furthermore, recurrent thrombosis could be diagnosed by mCT without further nanoparticle administration for up to 3 weeks. fib-GC-AuNP-based direct cerebral thrombus imaging greatly enhance the value and information obtainable by regular CT, has multiple uses in basic / translational vascular research, and will likely allow personalized thrombolytic therapy in clinic by a) optimizing tPA-dosing to match thrombus burden, b) enabling the rational triage of patients to more radical therapies such as endovascular clot-retrieval, and c) potentially serving as a theranostic platform for targeted delivery of concurrent thrombolysis.
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Abstract
We review recent advances in our understanding of interfacial phenomena that emerge when dissimilar materials are brought together at atomically sharp and coherent interfaces. In particular, we focus on phenomena that are intrinsic to the interface and review recent work carried out on perovskite manganites interfaces, a class of complex oxides whose rich electronic properties have proven to be a useful playground for the discovery and prediction of novel phenomena.
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Affiliation(s)
- C A F Vaz
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
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Thuy VTT, Lim CW, Park JH, Ahn CH, Kim D. Self-assembled nanoaggregates based on polyaspartamide graft copolymers for pH-controlled release of doxorubicin. J Mater Chem B 2015; 3:2978-2985. [DOI: 10.1039/c4tb01930j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The hydrazone group was effectively cleaved to release doxorubicin (DOX) conjugated on PASPAM in an acidic environment.
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Affiliation(s)
- Van Tran Thi Thuy
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Cheol Won Lim
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Jae Hyung Park
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Cheol-Hee Ahn
- Department of Materials Science and Engineering
- Seoul National University
- Seoul 151-744
- Republic of Korea
| | - Dukjoon Kim
- School of Chemical Engineering
- Sungkyunkwan University
- Suwon
- Republic of Korea
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Song G, Kim JE, Cho SM, Jeon SI, Park HJ, Huh J, Ahn CH, Park C. Controlled Nanopores by Supramolecular Assembly of End-Functionalized Dendrimer and Homopolymer Blend. ACS Macro Lett 2014; 3:1112-1116. [PMID: 35610806 DOI: 10.1021/mz500484k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Supramolecular assembly of end-functionalized polymers, forming block copolymer-like supramolecules based on ionic interaction, has been utilized as a simple and facile method for generating functionalized nanoporous thin film. Here, the binary blend film of aminated poly(ethylene oxide) dendrimer (APEO-G) and sulfonated polystyrene (SPS) at a stoichiometric composition after benzene/water solvent vapor annealing exhibits spherical domains in multilayers over a large area. By controlling the number of end-functional arms of dendrimer via divergent ring-opening polymerization of ethylene oxide as well as the molecular weights of SPS, the domain sizes can be controlled ranging from mainly 34 to 54 nm, even to 131 nm. Our supramolecular-assembly system provides an alternative approach to fabricating a functional nanotemplate by easily etching domains with selective solvent treatment and leaving functional groups at the pore surfaces.
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Affiliation(s)
- Giyoung Song
- Department
of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea
| | - Ju Eun Kim
- Department
of Materials Science and Engineering, Seoul University, San 56-1,
Gwanak_599 Gwanak-ro, Seoul, 515-744, Korea
| | - Suk Man Cho
- Department
of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea
| | - Seong Ik Jeon
- Department
of Materials Science and Engineering, Seoul University, San 56-1,
Gwanak_599 Gwanak-ro, Seoul, 515-744, Korea
| | - Hui Joon Park
- Division
of Energy Systems Research, Ajou University, 206 World cup-ro, Suwon 443-749, Korea
| | - June Huh
- Department
of Chemical and Biological Engineering, Korea University, Anam-dong,
Seongbuk-gu, Seoul 136-713, Korea
| | - Cheol-Hee Ahn
- Department
of Materials Science and Engineering, Seoul University, San 56-1,
Gwanak_599 Gwanak-ro, Seoul, 515-744, Korea
| | - Cheolmin Park
- Department
of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea
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Jeon MJ, Ahn CH, Kim H, Chung IJ, Jung S, Kim YH, Youn H, Chung JW, Kim YI. The intratumoral administration of ferucarbotran conjugated with doxorubicin improved therapeutic effect by magnetic hyperthermia combined with pharmacotherapy in a hepatocellular carcinoma model. J Exp Clin Cancer Res 2014; 33:57. [PMID: 25037747 PMCID: PMC4223607 DOI: 10.1186/s13046-014-0057-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 06/27/2014] [Indexed: 12/22/2022]
Abstract
Background Local hyperthermia of tumor in conjunction with chemotherapy is a promising strategy for cancer treatment. The aim of this study was to evaluate the efficacy of intratumoral delivery of clinically approved magnetic nanoparticles (MNPs) conjugated with doxorubicin to simultaneously induce magnetic hyperthermia and drug delivery in a hepatocellular carcinoma (HCC) model. Materials and methods HCC cells expressing luciferase were implanted into the flank of BALB/c-nu mice (n = 19). When the tumor diameter reached 7–8 mm, the animals were divided into four groups according to the injected agents: group A (normal saline, n = 4), group B (doxorubicin, n = 5), group C (MNP, n = 5), and group D (MNP/doxorubicin complex, n = 5). Animals were exposed to an alternating magnetic field (AMF) to receive magnetic hyperthermia, and intratumoral temperature changes were measured. Bioluminescence imagings (BLIs) were performed before treatment and at 3, 7, and 14 days after treatment to measure the tumoral activities. The relative signal intensity (RSI) of each tumor was calculated by dividing the BLI signal at each time point by the value measured before treatment. At day 14 post-treatment, all tumor tissues were harvested to assess the apoptosis rates by pathological examination. Results The rise in temperature of the tumors was 1.88 ± 0.21°C in group A, 0.96 ± 1.05°C in B, 7.93 ± 1.99°C in C, and 8.95 ± 1.31°C in D. The RSI of the tumors at day 14 post-treatment was significantly lower in group D (0.31 ± 0.20) than in group A (2.23 ± 1.14), B (0.94 ± 0.47), and C (1.02 ± 0.21). The apoptosis rates of the tumors were 11.52 ± 3.10% in group A, 23.0 ± 7.68% in B, 25.4 ± 3.36% in C, and 39.0 ± 13.2% in D, respectively. Conclusions The intratumoral injection of ferucarbotran conjugated with doxorubicin shows an improved therapeutic effect compared with doxorubicin or ferucarbotran alone when the complex is injected into HCC tissues exposed to AMF for magnetic hyperthermia. This strategy of combining doxorubicin and MNP-induced magnetic hyperthermia exhibits a synergic effect on inhibiting tumor growth in an HCC model.
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Jang ES, Lee SY, Cha EJ, Sun IC, Kwon IC, Kim D, Kim YI, Kim K, Ahn CH. Fluorescent dye labeled iron oxide/silica core/shell nanoparticle as a multimodal imaging probe. Pharm Res 2014; 31:3371-8. [PMID: 24879466 DOI: 10.1007/s11095-014-1426-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 05/12/2014] [Indexed: 10/25/2022]
Abstract
PURPOSE To develop an MRI/optical multimodal imaging probe based on dye-conjugated iron oxide/silica core/shell nanoparticle, and investigate the distance-dependent fluorescence quenching through careful control of the distance between the iron oxide core and fluorescent dyes. METHODS Different size of core/shell nanoparticles were prepared by varying the silica shell width. PEGylation on the surface of silica shell was followed to improve the stability of particles in the physiological condition. In vitro cytotoxicity was evaluated by the MTT assay on a HeLa cell line and in vivo imaging of subcutaneous SCC7 xenografted mice was performed using MRI/optical imaging modalities. RESULTS Diameter and ζ-potential of the nanoparticles were measured, and TEM images demonstrated the mono-disperse nature of the particles. Quenching efficiency of the dyes on the surface was nearly 100% in the smallest nanoparticle, while almost no quenching effect was observed for the largest nanoparticle. In vitro cytotoxicity showed nearly 90% cell viability at 0.15 Fe mg/mL, a comparable concentration for clinical use. The tumor area was significantly darkened after the nanoparticle injection due to the high transverse relaxivity value of the nanoparticles. Fluorescence signal was affected by the particle size due to the distance-dependent quenching/dequenching behaviour.
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Affiliation(s)
- Eue Soon Jang
- Advanced Materials Educational Institute, Kumoh National Institute of Technology, Sanho-ro 77, Yangho, Gumi, 730-701, South Korea
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Haque MR, Lee DY, Ahn CH, Jeong JH, Byun Y. Local co-delivery of pancreatic islets and liposomal clodronate using injectable hydrogel to prevent acute immune reactions in a type 1 diabetes. Pharm Res 2014; 31:2453-62. [PMID: 24633416 DOI: 10.1007/s11095-014-1340-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 02/13/2014] [Indexed: 12/20/2022]
Abstract
PURPOSE The purpose of this study was to investigate the effect of locally delivered pancreatic islet with liposomal clodronate (Clodrosome®) as an immunoprotection agent for the treatment of type 1 diabetes. METHOD The bio-distribution of liposomal clodronate in matrigel was checked by imaging analyzer. To verify the therapeutic efficacy of locally delivered islet with liposomal clodronate using injectable hydrogel, four groups of islet transplanted mice (n = 6 in each group) were prepared: 1) the islet group, 2) the islet-Clodrosome group, 3) the islet-Matrigel group, and 4) the islet-Matrigel-Clodrosome group. Immune cell migration and activation, and pro-inflammatory cytokine secretion was evaluated by immunohistochemistry staining and ELISA assay. RESULTS Cy5.5 labeled liposomes remained in the matrigel for over 7 days. The median survival time of transplanted islets (Islet-Matrigel-Clodrosome group) was significantly increased (>60 days), compared to other groups. Locally delivered liposomal clodronate in matrigel effectively inhibited the activation of macrophages, immune cell migration and activation, and pro-inflammatory cytokine secretion from macrophages. CONCLUSIONS Locally co-delivered pancreatic islets and liposomal clodronate using injectable hydrogel effectively cured type 1 diabetes. Especially, the inhibition of macrophage attack in the early stage after local delivery of islets was very important for the successful long-term survival of delivered islets.
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Affiliation(s)
- Muhammad R Haque
- Research Institute of Pharmaceutical Science, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
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Abstract
We examine a prototype graphene field effect sensor for the study of the dielectric constant, pyroelectric coefficient, and ferroelectric polarization of 100-300 nm epitaxial (Ba,Sr)TiO3 thin films. Ferroelectric switching induces hysteresis in the resistivity and carrier density of n-layer graphene (n = 1-5) below 100 K, which competes with an antihysteresis behavior activated by the combined effects of electric field and temperature. We also discuss how the polarization asymmetry and interface charge dynamics affect the electronic properties of graphene.
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Affiliation(s)
- A Rajapitamahuni
- Department of Physics and Astronomy and ‡Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln , Nebraska 68588-0299, United States
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Jeong JH, Yook S, Lee H, Ahn CH, Lee DY, Byun Y. Effects of surface camouflaged islet transplantation on pathophysiological progression in a db/db type 2 diabetic mouse model. Biochem Biophys Res Commun 2013; 433:513-8. [DOI: 10.1016/j.bbrc.2013.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 03/06/2013] [Indexed: 11/16/2022]
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Kim DE, Kim JY, Sun IC, Schellingerhout D, Lee SK, Ahn CH, Kwon IC, Kim K. Hyperacute direct thrombus imaging using computed tomography and gold nanoparticles. Ann Neurol 2013; 73:617-25. [PMID: 23495101 DOI: 10.1002/ana.23849] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Revised: 12/10/2012] [Accepted: 01/04/2012] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Advancing the understanding and management of thromboembolic stroke requires simple and robust new methods that would be useful for the in vivo assessment of thrombus burden/distribution and for characterizing its evolution in a prompt and quantitative manner. METHODS Animals (n=127) with experimental models of thrombosis were imaged with microcomputed tomography 5 minutes (and/or ~3 weeks) after intravenous injection of glycol chitosan (GC) gold nanoparticles (AuNPs). RESULTS Nanoparticles accumulated in the thrombus, allowing computed tomography visualization of both the presence and extent of primary and recurrent thrombi in mouse carotid arteries without a single failure of detection. Nanoparticle thrombus imaging was also effective in monitoring the therapeutic efficacy of thrombolysis (n=118 tissue plasminogen activator [tPA] therapies). Thrombus evolution (either spontaneous or post-tPA) could be mapped at high resolution in both space and time. Due to a long circulating half-life, GC-AuNPs remain available for entrapment into fibrin matrix for an extended period of time (up to 3 weeks), allowing repetition or ongoing monitoring of thrombogenesis and thrombolysis. INTERPRETATION This is the first report on a hyperacute direct thrombus imaging technique using thrombus-seeking AuNPs and computed tomography. When translated into stroke practice, the thrombus imaging may allow us to advance to personalized thrombolytic therapy by demonstrating thrombus burden, distribution, and character in a prompt and quantitative manner. Further study into this area is indicated.
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Affiliation(s)
- Dong-Eog Kim
- Molecular Imaging and Neurovascular Research Laboratory, Department of Neurology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Republic of Korea.
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Im BH, Jeong JH, Haque MR, Lee DY, Ahn CH, Kim JE, Byun Y. The effects of 8-arm-PEG-catechol/heparin shielding system and immunosuppressive drug, FK506 on the survival of intraportally allotransplanted islets. Biomaterials 2013; 34:2098-106. [DOI: 10.1016/j.biomaterials.2012.11.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 11/20/2012] [Indexed: 01/26/2023]
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Yook S, Jeong JH, Jung YS, Hong SW, Im BH, Seo JW, Park JB, Lee M, Ahn CH, Lee H, Lee DY, Byun Y. Molecularly Engineered Islet Cell Clusters for Diabetes Mellitus Treatment. Cell Transplant 2012; 21:1775-89. [DOI: 10.3727/096368912x640628] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Pancreatic islet transplantation is a promising method for curing diabetes mellitus. We proposed in this study a molecularly engineered islet cell clusters (ICCs) that could overcome problems posed by islet transplantation circumstances and host's immune reactions. A gene containing highly releasable exendin-4, an insulinotropic protein, was delivered into single islet cells to enhance glucose sensitivity; thereafter, the cells were reaggregated into small size ICCs. Then the surface of ICCs was modified with biocompatible poly(ethylene glycol)-lipid (PEG) (C18) for preventing immune reactions. The regimen of ICCs with low doses of anti-CD154 mAb and tacrolimus could effectively maintain the normal glucose level in diabetic mice. This molecularly engineered PEG-Sp-Ex-4 ICC regimen prevented cell death in transplantation site, partly through improving the regulation of glucose metabolism and by preventing hypoxia- and immune response-induced apoptosis. Application of this remedy is also potentially far-reaching; one would be to help overcome islet supply shortage due to the limited availability of pancreas donors and reduce the immunosuppressant regimens to eliminate their adverse effects.
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Affiliation(s)
- Simmyung Yook
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jee-Heon Jeong
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Yoon Suk Jung
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Sung Woo Hong
- WCU Departments of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea
| | - Bok Hyeon Im
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jin Won Seo
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jun Beom Park
- WCU Departments of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea
| | - Minhyung Lee
- Department of Bioengineering, College of Engineering, and Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul, Republic of Korea
| | - Cheol-Hee Ahn
- Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Haeshin Lee
- Graduate School Nanoscience and Technology, College of Natural Science, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
| | - Dong Yun Lee
- Department of Bioengineering, College of Engineering, and Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul, Republic of Korea
| | - Youngro Byun
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
- WCU Departments of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Republic of Korea
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Jeong JH, Yook S, Jung Y, Im BH, Lee M, Ahn CH, Lee DY, Byun Y. Functional enhancement of beta cells in transplanted pancreatic islets by secretion signal peptide-linked exendin-4 gene transduction. J Control Release 2012; 159:368-75. [DOI: 10.1016/j.jconrel.2012.01.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 12/29/2011] [Accepted: 01/22/2012] [Indexed: 10/14/2022]
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Kim HS, Ahn CH, Park TS, Park HD, Koh KS, Ryoo ZY, Park SC, Lee S. Gene expression profiling of a cold-shocked earthworm Eisenia andrei. Cryo Letters 2012; 33:1-11. [PMID: 22434117] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To identify genes that are modulated under cold-stress conditions in the earthworm Eisenia andrei, we performed a genome-wide analysis of gene expression in cold-shocked earthworms by using Serial Analysis of Gene Expression (SAGE). We identified 5,977 and 5,407 unique SAGE tags under normal and cold-stressed conditions, respectively. The majority of the SAGE tags did not match to any known expressed sequences, due to a paucity of expression data in earthworms. We converted the statistically significant SAGE tags for the cold-stressed condition into expressed sequence tags (ESTs), and the results showed that particular genes associated with energy homeostasis, cellular defense mechanisms, and ion balance were up-regulated or down-regulated. We constructed a regulatory network of some of these genes and identified rps-6 as a core gene in the cold-response regulatory-gene network. Our data provide a baseline for gene expression studies of cold shock in the Lumbricidae.
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Affiliation(s)
- H S Kim
- School of Life Science and Biotechnology, Kyungpook National University, Seoul, Republic of Korea
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Jeong JH, Hong SW, Hong S, Yook S, Jung Y, Park JB, Khue CD, Im BH, Seo J, Lee H, Ahn CH, Lee DY, Byun Y. Surface camouflage of pancreatic islets using 6-arm-PEG-catechol in combined therapy with tacrolimus and anti-CD154 monoclonal antibody for xenotransplantation. Biomaterials 2011; 32:7961-70. [DOI: 10.1016/j.biomaterials.2011.06.068] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 06/28/2011] [Indexed: 12/11/2022]
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47
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Segal Y, Garrity KF, Vaz CAF, Hoffman JD, Walker FJ, Ismail-Beigi S, Ahn CH. Dynamic evanescent phonon coupling across the La(1-x)Sr(x)MnO3/SrTiO3 interface. Phys Rev Lett 2011; 107:105501. [PMID: 21981508 DOI: 10.1103/physrevlett.107.105501] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2011] [Indexed: 05/31/2023]
Abstract
The transport and magnetic properties of correlated La0.53Sr0.47MnO3 ultrathin films, grown epitaxially on SrTiO3, show a sharp cusp at the structural transition temperature of the substrate. Using a combination of experiment and first principles theory we show that the cusp is a result of evanescent cross-interface coupling between the charge carriers in the film and a soft phonon mode in the SrTiO3, mediated through linked oxygen octahedral motions. The amplitude of the mode diverges at the transition temperature, and phonons are launched into the first few atomic layers of the film, affecting its electronic state.
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Affiliation(s)
- Y Segal
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8284, USA
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Sun IC, Eun DK, Koo H, Ko CY, Kim HS, Yi DK, Choi K, Kwon IC, Kim K, Ahn CH. Tumor-targeting gold particles for dual computed tomography/optical cancer imaging. Angew Chem Int Ed Engl 2011; 50:9348-51. [PMID: 21948430 DOI: 10.1002/anie.201102892] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 06/29/2011] [Indexed: 11/11/2022]
Affiliation(s)
- In-Cheol Sun
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136-791, Korea
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Sun IC, Eun DK, Koo H, Ko CY, Kim HS, Yi DK, Choi K, Kwon IC, Kim K, Ahn CH. Tumor-Targeting Gold Particles for Dual Computed Tomography/Optical Cancer Imaging. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102892] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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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Cha EJ, Jang ES, Sun IC, Lee IJ, Ko JH, Kim YI, Kwon IC, Kim K, Ahn CH. Development of MRI/NIRF 'activatable' multimodal imaging probe based on iron oxide nanoparticles. J Control Release 2011; 155:152-8. [PMID: 21801769 DOI: 10.1016/j.jconrel.2011.07.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 07/04/2011] [Accepted: 07/10/2011] [Indexed: 12/11/2022]
Abstract
A fabrication method of Cy5.5-MMP substrate and PEG conjugated iron oxide nanoparticles with thin silica coating (PCM-CS) and its potential as an 'activatable' dual imaging probe for tumor imaging is described in this report. PCM-CS showed an intensity-averaged diameter of 43.1 ± 6.3 nm by dynamic light scattering without any noticeable aggregation over 7 days. Fluorescence of Cy5.5 on the surface of nanoparticles was fully quenched and the quenching efficiency was 97.2%. PCM-CS showed protease specific fluorescence recovery in vitro caused from the specific peptide cleavage by MMP-2 and the probe displayed the sensitivity on 0.5 nM or less enzyme concentration. Tumor was successfully visualized by NIRF and MRI in vivo by intravenously injected PCM-CS. NIRF signal of tumor was gradually increased up to 12h post injection and the intensity of tumor was about 3-4 times higher than normal tissue. NIRF signal at MMP-2 inhibitor treated tumor was clearly lower than tumor without inhibitor due to the insufficient peptide cleavage. NIRF signal at excised tumor was 5-10 times stronger than other organs. Noticeable darkening in magnetic resonance image was observed at the tumor region and the image was gradually darkened at 12h post injection of PCM-CS. The maximum signal difference between tumor region and healthy muscle was 34%.
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Affiliation(s)
- Eui-Joon Cha
- Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-744, Republic of Korea
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