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Lee D, Cha ES, Park S, Sung H, Noh E, Jeong H, Jang WI, Seo S. Cohort Profile: The Korean Radiation Workers Study (KRWS). Int J Epidemiol 2024; 53:dyae060. [PMID: 38628072 DOI: 10.1093/ije/dyae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 04/05/2024] [Indexed: 04/19/2024] Open
Affiliation(s)
- Dalnim Lee
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Eun Shil Cha
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Soojin Park
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Hyoju Sung
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Eunbi Noh
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Haesu Jeong
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Won-Il Jang
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Songwon Seo
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
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Kim MY, Park ER, Cho EH, Park SH, Han CJ, Kim SB, Gu MB, Shin HJ, Lee KH. Depletion of proteasome subunit PSMD1 induces cancer cell death via protein ubiquitination and DNA damage, irrespective of p53 status. Sci Rep 2024; 14:7997. [PMID: 38580756 PMCID: PMC10997673 DOI: 10.1038/s41598-024-58215-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 03/26/2024] [Indexed: 04/07/2024] Open
Abstract
Hepatocellular carcinoma (HCC) is characterized by high incidence and fatality rates worldwide. In our exploration of prognostic factors in HCC, the 26s proteasome subunit, non-ATPase 1 (PSMD1) protein emerged as a significant contributor, demonstrating its potential as a therapeutic target in this aggressive cancer. PSMD1 is a subunit of the 19S regulatory particle in the 26S proteasome complex; the 19S particle controls the deubiquitination of ubiquitinated proteins, which are then degraded by the proteolytic activity of the complex. Proteasome-targeting in cancer therapy has received significant attention because of its practical application as an established anticancer agent. We investigated whether PSMD1 plays a critical role in cancer owing to its prognostic significance. PSMD1 depletion induced cell cycle arrest in G2/M phase, DNA damage and apoptosis of cancer cells, irrespective of the p53 status. PSMD1 depletion-mediated cell death was accompanied by an increase in overall protein ubiquitination. These phenotypes occurred exclusively in cancer cells, with no effects observed in normal cells. These findings indicate that PSMD1 depletion-mediated ubiquitination of cellular proteins induces cell cycle arrest and eventual death in cancer cells, emphasizing PSMD1 as a potential therapeutic target in HCC.
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Affiliation(s)
- Mi-Yeun Kim
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Korea University, 75, Nowon-Ro, Nowon-Gu, Seoul, 01812, South Korea
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Eun-Ran Park
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Korea University, 75, Nowon-Ro, Nowon-Gu, Seoul, 01812, South Korea
| | - Eung-Ho Cho
- Department of Surgery, Division of Radiological and Clinical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Sun-Hoo Park
- Department of Pathology, Division of Radiological and Clinical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Chul Ju Han
- Department of Internal Medicine, Division of Radiological and Clinical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Sang-Bum Kim
- Department of Surgery, Division of Radiological and Clinical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Man Bock Gu
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Hyun-Jin Shin
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Korea University, 75, Nowon-Ro, Nowon-Gu, Seoul, 01812, South Korea.
| | - Kee-Ho Lee
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Korea University, 75, Nowon-Ro, Nowon-Gu, Seoul, 01812, South Korea.
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Kim S, Mushtaq S, Lee KC, Park JA, Kim JY. 64Cu-Labeled Boron-Containing Cyclic RGD Peptides for BNCT and PET Imaging. ACS Med Chem Lett 2024; 15:344-348. [PMID: 38505860 PMCID: PMC10945535 DOI: 10.1021/acsmedchemlett.4c00007] [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: 01/05/2024] [Revised: 02/02/2024] [Accepted: 02/16/2024] [Indexed: 03/21/2024] Open
Abstract
The burgeoning interest in developing boron neutron capture therapy (BNCT) tracers and their accompanying diagnostics for the treatment of recalcitrant tumors has prompted this investigation. Our study aims to devise a tumor treatment strategy utilizing BNCT to target the αvβ3 integrin. To this end, we propose a pioneering boron-infused cyclic Arg-Gly-Asp (RGD) peptide, cRGD(d-BPA)K, designed as an efficacious BNCT tracer. Additionally, we introduce its diagnostic complement, DOTA-cRGD(d-BPA)K, tailored for positron emission tomography (PET) to visualize αvβ3 expressed tumors. Radiolabeling [64Cu]Cu-DOTA-cRGD(d-BPA)K (64Cu-1) resulted in a high radiochemical yield and purity. The radiotracer exhibited exceptional in vitro stability and demonstrated significant uptake in U87MG tumors via PET imaging. Biodistribution analysis using compound 2 showed a 7.0 ppm accumulation of boron in the U87MG tumor 1 h post-intravenous injection. Furthermore, compound 2 displayed superior tumor/blood (2.41) and tumor/muscle (2.46) ratios compared to the clinically approved l-BPA-fructose. Both compound 2 and its diagnostic counterpart 64Cu-1 hold potential for BNCT and cancer diagnosis, respectively, via molecular imaging.
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Affiliation(s)
- Soyeon Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic
of Korea
| | - Sajid Mushtaq
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic
of Korea
- Department
of Nuclear Engineering, Pakistan Institute
of Engineering and Applied Sciences, P.O. Nilore, Islamabad 45650, Pakistan
| | - Kyo Chul Lee
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic
of Korea
| | - Ji Ae Park
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic
of Korea
| | - Jung Young Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul 01812, Republic
of Korea
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Mushtaq S, Kim S, Bibi I, Park JA, Yang JU, Park H, Kim JY. Bioaccumulation and in vivo tracking of radiolabeled 4-nonylphenol in mice. RSC Adv 2024; 14:8578-8582. [PMID: 38487519 PMCID: PMC10938378 DOI: 10.1039/d3ra08743c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 03/07/2024] [Indexed: 03/17/2024] Open
Abstract
4-Nonylphenol (4NP) is concerning due to its growing presence and endocrine-disrupting nature, raising concerns about its impact on health. In this study 124I-labeled 4NP was synthesized for in vivo tracing. Positron emission tomography imaging and biodistribution studies showed significant accumulation in various tissues after oral or intraperitoneal administration, emphasizing its intricate distribution and potential long-term effects, crucial for future risk assessments.
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Affiliation(s)
- Sajid Mushtaq
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
- Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences P. O. Nilore Islamabad 45650 Pakistan
| | - Soyeon Kim
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
| | - Iqra Bibi
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
- Korea National University of Science and Technology 217 Gajeong-ro, Yuseong-gu Daejeon 3411 Republic of Korea
| | - Ji Ae Park
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
- Korea National University of Science and Technology 217 Gajeong-ro, Yuseong-gu Daejeon 3411 Republic of Korea
| | - Ji-Ung Yang
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
| | - Hyun Park
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
| | - Jung Young Kim
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences 75 Nowon-ro, Nowon-gu Seoul 01812 Republic of Korea +82-2-970-1977 +82-2-970-1660
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Sung B, Hwang D, Baek A, Yang B, Lee S, Park J, Kim E, Kim M, Lee E, Chang Y. Gadolinium-Based Magnetic Resonance Theranostic Agent with Gallic Acid as an Anti-Neuroinflammatory and Antioxidant Agent. Antioxidants (Basel) 2024; 13:204. [PMID: 38397802 PMCID: PMC10885874 DOI: 10.3390/antiox13020204] [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: 11/29/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
Studies in the field have actively pursued the incorporation of diverse biological functionalities into gadolinium-based contrast agents, aiming at the amalgamation of MRI imaging and therapeutic capabilities. In this research, we present the development of Gd-Ga, an anti-neuroinflammatory MR contrast agent strategically designed to target inflammatory mediators for comprehensive imaging diagnosis and targeted lesion treatment. Gd-Ga is a gadolinium complex composed of 1,4,7-tris(carboxymethylaza)cyclododecane-10-azaacetylamide (DO3A) conjugated with gallic acid (3,4,5-trihydroxybenzoic acid). Upon intravenous administration in LPS-induced mouse models, Gd-Ga demonstrated a remarkable three-fold increase in signal-to-noise (SNR) variation compared to Gd-DOTA, particularly evident in both the cortex and hippocampus 30 min post-MR monitoring. In-depth investigations, both in vitro and in vivo, into the anti-neuroinflammatory properties of Gd-Ga revealed significantly reduced protein expression levels of pro-inflammatory mediators compared to the LPS group. The alignment between in silico predictions and phantom studies indicates that Gd-Ga acts as an anti-neuroinflammatory agent by directly binding to MD2. Additionally, the robust antioxidant activity of Gd-Ga was confirmed by its effective scavenging of NO and ROS. Our collective findings emphasize the immense potential of this theranostic complex, where a polyphenol serves as an anti-inflammatory drug, presenting an exceptionally efficient platform for the diagnosis and treatment of neuroinflammation.
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Affiliation(s)
- Bokyung Sung
- ICT Convergence Research Center, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea;
| | - Dongwook Hwang
- Department of Biomedical Science, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea;
- Theranocure Co., Ltd., 90 Chilgokjungang-daero 136-gil, Buk-gu, Daegu 41405, Republic of Korea; (B.Y.); (S.L.)
| | - Ahrum Baek
- Institute of Biomedical Engineering Research, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea; (A.B.); (E.L.)
| | - Byeongwoo Yang
- Theranocure Co., Ltd., 90 Chilgokjungang-daero 136-gil, Buk-gu, Daegu 41405, Republic of Korea; (B.Y.); (S.L.)
- Department of Medical & Biological Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Sangyun Lee
- Theranocure Co., Ltd., 90 Chilgokjungang-daero 136-gil, Buk-gu, Daegu 41405, Republic of Korea; (B.Y.); (S.L.)
- Department of Medical & Biological Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Jangwoo Park
- Korea Radioisotope Center for Pharmaceuticals, Korea Institute of Radiological & Medical Sciences, Seoul 01812, Republic of Korea; (J.P.); (E.K.)
| | - Eunji Kim
- Korea Radioisotope Center for Pharmaceuticals, Korea Institute of Radiological & Medical Sciences, Seoul 01812, Republic of Korea; (J.P.); (E.K.)
- Center for Data Analytics Innovation, Office of National R&D Evaluation and Analysis, Korea Institute of S&T Evaluation and Planning, 1339, Wonjung-ro, Maengdong-myeon, Eumseong-gun 27740, Republic of Korea
| | - Minsup Kim
- TARS Scientific, Nowon-gu, Seoul 01662, Republic of Korea;
| | - Eunshil Lee
- Institute of Biomedical Engineering Research, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea; (A.B.); (E.L.)
| | - Yongmin Chang
- Department of Biomedical Science, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea;
- Institute of Biomedical Engineering Research, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea; (A.B.); (E.L.)
- Department of Medical & Biological Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
- Department of Molecular Medicine, School of Medicine, Kyungpook National University, 680 Guchaebosang-ro, Jung-gu, Daegu 41944, Republic of Korea
- Department of Radiology, Kyungpook National University Hospital, 130 Dongdeok-ro, Jung-gu, Daegu 41944, Republic of Korea
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Ali Al Saidi AK, Ghazanfari A, Baek A, Tegafaw T, Ahmad MY, Zhao D, Liu Y, Yang JU, Park JA, Yang BW, Chae KS, Nam SW, Chang Y, Lee GH. Ultrasmall cerium oxide nanoparticles as highly sensitive X-ray contrast agents and their antioxidant effect. RSC Adv 2024; 14:3647-3658. [PMID: 38268539 PMCID: PMC10805080 DOI: 10.1039/d3ra08372a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 01/15/2024] [Indexed: 01/26/2024] Open
Abstract
Owing to their theranostic properties, cerium oxide (CeO2) nanoparticles have attracted considerable attention for their key applications in nanomedicine. In this study, ultrasmall CeO2 nanoparticles (particle diameter = 1-3 nm) as X-ray contrast agents with an antioxidant effect were investigated for the first time. The nanoparticles were coated with hydrophilic and biocompatible poly(acrylic acid) (PAA) and poly(acrylic acid-co-maleic acid) (PAAMA) to ensure satisfactory colloidal stability in aqueous media and low cellular toxicity. The synthesized nanoparticles were characterized using high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, cell viability assay, photoluminescence spectroscopy, and X-ray computed tomography (CT). Their potential as X-ray contrast agents was demonstrated by measuring phantom images and in vivo CT images in mice injected intravenously and intraperitoneally. The X-ray attenuation of these nanoparticles was greater than that of the commercial X-ray contrast agent Ultravist and those of larger CeO2 nanoparticles reported previously. In addition, they exhibited an antioxidant effect for the removal of hydrogen peroxide. The results confirmed that the PAA- and PAAMA-coated ultrasmall CeO2 nanoparticles demonstrate potential as highly sensitive radioprotective or theranostic X-ray contrast agents.
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Affiliation(s)
| | - Adibehalsadat Ghazanfari
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ahrum Baek
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Tirusew Tegafaw
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Mohammad Yaseen Ahmad
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Dejun Zhao
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ying Liu
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ji-Ung Yang
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Ji Ae Park
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Byeong Woo Yang
- Theranocure Medlifescience Bldg. 1, Chilgok, Bukgu Taegu 41405 South Korea
| | - Kwon Seok Chae
- Department of Biology Education, Teachers' College, Kyungpook National University Taegu 41566 South Korea
| | - Sung-Wook Nam
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Yongmin Chang
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Gang Ho Lee
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
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Mushtaq S, Husnain SM, Kazmi SAR, Abbas Y, Jeon J, Kim JY, Shahzad F. MXene/AgNW composite material for selective and efficient removal of radioactive cesium and iodine from water. Sci Rep 2023; 13:19696. [PMID: 37952015 PMCID: PMC10640589 DOI: 10.1038/s41598-023-47075-y] [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: 08/20/2023] [Accepted: 11/08/2023] [Indexed: 11/14/2023] Open
Abstract
Toxic fission products, such as cesium (137Cs) and iodine (129I) are of great concern because of their long half-lives and high solubility in water. The simultaneous removal of Cs and I using a single adsorbent is an area of increasing interest. In this study, MXene/silver nanowire (AgNW) composite was synthesized through physical mixing and employed for simultaneous removal of iodide (I-) and cesium (Cs+) ions from contaminated water. The MXene/AgNW composite demonstrated excellent adsorption capacities of 84.70 and 26.22 mg/g for I- and Cs+, respectively. The experimental data supported the hypothesis of multilayer adsorption of Cs+ owing to the inter-lamellar structures and the presence of heterogeneous adsorption sites in MXene. The interaction between I- and the AgNW involved chemisorption followed by monolayer adsorption. MXene/AgNW composite material exhibited promising results in the presence of competitive ions under extreme pH conditions. Thus, synthesized composite materials holds promising potential as an adsorbent for the remediation of radioactive liquid waste.
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Affiliation(s)
- Sajid Mushtaq
- Division of RI-Applied Research, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul, 01812, Korea.
- Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences, P. O. Nilore, Islamabad, 45650, Pakistan.
| | - Syed M Husnain
- Chemistry Division, Directorate of Science, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, 45650, Pakistan
| | - Syed Asad Raza Kazmi
- Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, P.O. Nilore, Islamabad, 45650, Pakistan
| | - Yawar Abbas
- Department of Physics, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
| | - Jongho Jeon
- Department of Chemistry, Kyungpook National University, Daegu 80, Republic of Korea
| | - Jung Young Kim
- Division of RI-Applied Research, Korea Institute of Radiological and Medical Sciences (KIRAMS), Seoul, 01812, Korea
| | - Faisal Shahzad
- Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, P.O. Nilore, Islamabad, 45650, Pakistan.
- Research and Innovation Center for Graphene and 2D Materials (RIC2D), Khalifa University, 127788, Abu Dhabi, United Arab Emirates.
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Cho S, Jeon DG, Cho WH, Song WS, Kim Y. Proximal Femur Salvage in Revision Knee Arthroplasty Due to Oncologic Indications: Long-term Results of Onlay and Overlapping Allograft in Revision Surgeries. Clin Orthop Surg 2023; 15:853-863. [PMID: 37811502 PMCID: PMC10551674 DOI: 10.4055/cios22254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 06/08/2023] [Accepted: 06/08/2023] [Indexed: 10/10/2023] Open
Abstract
Background Mechanical failures of tumor endoprosthesis in the distal femur usually require revision surgery. We investigated if the proximal femur host bone can be salvaged by onlay and overlapping allograft in revision surgeries due to aseptic loosening and stem fractures. Methods We retrospectively reviewed 18 patients (7 men and 11 women) with osteosarcoma around the knee. The entire cohort was classified into three subgroups (no bone graft: 6, onlay allograft: 7, and overlapping allograft: 5) according to our treatment strategy. Results The median interval from the initial surgery to the revision was 94.5 months (range, 21-219 months), and the median follow-up period from the revision surgery was 88.0 months (range, 24-179 months). At the last follow-up, 9 of the 18 patients maintained their endoprostheses, and the 5-year prosthesis survival rate was 57.9%. Limb survival was 100%. Five-year prosthesis survival rate was 66.7% in the no bone graft group, 85.7% in the onlay allograft group while 30.0% in the overlapping allograft group. In the no bone graft group and onlay allograft group, 66.7% (4/6) and 57.1% (4/7) maintained their revision prostheses while no prostheses survived in the overlapping allograft group. Recurrent stem loosening was observed in 14.2% (1/7) and 60.0% (3/5) of the onlay allograft and overlapping allograft groups, respectively, despite allograft bone union. The complication rate was 66.7% (12/18) in the entire cohort. The most common type of complication was infection (n = 6), followed by aseptic loosening (n = 4) and mechanical failure (n = 2). Conclusions This study indicates that onlay allograft can be used as a supportive method in revising failed endoprosthesis if the extent of host bone destruction is extensive. However, applying overlapping allograft to secure bone stock showed a high rate of mechanical failures and infection in the long term. Future studies with a larger cohort are necessary to assess the prognostic factors for the higher complication rate in overlapping allograft and the need for overlapping allograft. Surveillance with consideration of the risk of anteromedial osteolysis in allograft and efforts for prevention of periprosthetic infection are essential.
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Affiliation(s)
- Sanghyun Cho
- Department of Orthopedic Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Dae-Geun Jeon
- Department of Orthopedic Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Wan Hyeong Cho
- Department of Orthopedic Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Won Seok Song
- Department of Orthopedic Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Yongsung Kim
- Department of Orthopedic Surgery, Korea Cancer Center Hospital, Seoul, Korea
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
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Kim K, Byun BH, Lim I, Lim SM, Woo SK. Deep Learning-Based Delayed PET Image Synthesis from Corresponding Early Scanned PET for Dosimetry Uptake Estimation. Diagnostics (Basel) 2023; 13:3045. [PMID: 37835788 PMCID: PMC10572561 DOI: 10.3390/diagnostics13193045] [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: 08/22/2023] [Revised: 09/19/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023] Open
Abstract
The acquisition of in vivo radiopharmaceutical distribution through imaging is time-consuming due to dosimetry, which requires the subject to be scanned at several time points post-injection. This study aimed to generate delayed positron emission tomography images from early images using a deep-learning-based image generation model to mitigate the time cost and inconvenience. Eighteen healthy participants were recruited and injected with [18F]Fluorodeoxyglucose. A paired image-to-image translation model, based on a generative adversarial network (GAN), was used as the generation model. The standardized uptake value (SUV) mean of the generated image of each organ was compared with that of the ground-truth. The least square GAN and perceptual loss combinations displayed the best performance. As the uptake time of the early image became closer to that of the ground-truth image, the translation performance improved. The SUV mean values of the nominated organs were estimated reasonably accurately for the muscle, heart, liver, and spleen. The results demonstrate that the image-to-image translation deep learning model is applicable for the generation of a functional image from another functional image acquired from normal subjects, including predictions of organ-wise activity for specific normal organs.
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Affiliation(s)
- Kangsan Kim
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea;
| | - Byung Hyun Byun
- Department of Nuclear Medicine, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea
| | - Ilhan Lim
- Department of Nuclear Medicine, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea
| | - Sang Moo Lim
- Department of Nuclear Medicine, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea
| | - Sang-Keun Woo
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea;
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Kim HJ, Lee J, Park IC, Han Y, Seong MK, Noh WC, Kang HJ, Kim HA, Park CS. Survival analysis of breast cancer patients after diagnosis of second primary malignancies, focusing on the second primary hematologic malignancy. Ann Surg Treat Res 2023; 105:1-9. [PMID: 37441319 PMCID: PMC10333803 DOI: 10.4174/astr.2023.105.1.1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/20/2023] [Accepted: 05/30/2023] [Indexed: 07/15/2023] Open
Abstract
Purpose Although the overall survival (OS) of breast cancer patients is increasing with improved detection and therapies, so is the risk of breast cancer patients developing subsequent malignancies. We investigated the OS of breast cancer survivors according to sites of second primary malignancies (SPM). The OS of the second primary hematologic malignancy (SPHM) was then compared with that of metastatic breast cancer (MBC). Methods We retrospectively analyzed patients diagnosed with primary breast cancer between 1998 and 2019. Only those with SPM were eligible for analysis. First, the OS of patients with SPM diagnosed as the first event after the diagnosis of breast cancer was analyzed. Next, the OS of patients with SPHM, with or without breast cancer relapse, was compared with that of patients with MBC, matched using the propensity score. Results Patients diagnosed with SPM without breast cancer relapse as the first event had a significantly better OS than did patients with MBC, but the OS of those with SPHM as the first event did not differ significantly from that of patients with MBC (hazard ratio [HR], 1.558; 95% confidence interval [CI], 0.856-2.839; P = 0.147). The OS of patients with SPHM with or without breast cancer relapse was worse than that of the MBC group after propensity score matching (HR, 1.954; 95% CI, 1.045-3.654; P = 0.036). Conclusion Prognosis of SPM diagnosed as the first event was statistically better than that of MBC, except in case of SPHM. Patients with SPHM, with or without MBC, showed poor OS before and after propensity score matching.
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Affiliation(s)
- Hyung Jin Kim
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Juhyeon Lee
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - In-Chul Park
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Korea
| | - Yireh Han
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Min-Ki Seong
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Woo Chul Noh
- Department of Surgery, Konkuk University Medical Center, Seoul, Korea
| | - Hye Jin Kang
- Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Hyun-Ah Kim
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Chan Sub Park
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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11
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Kang S, Ahn H, Park C, Yun WH, Jeong JG, Lee YJ, Kim DW. In Vivo Fluorescence Molecular Imaging Using Covalent Organic Nanosheets Without Labeling. Adv Sci (Weinh) 2023; 10:e2300462. [PMID: 37066794 DOI: 10.1002/advs.202300462] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/03/2023] [Indexed: 06/04/2023]
Abstract
Organic nanomaterials, as nanocarrier platforms, have tremendous potential for biomedical applications. The authors successfully prepared novel two-dimensional covalent organic nanosheets (CONs) that can be used as efficient in vivo bioimaging probes by condensing 1,3,5-triformylglucinol (Tp) and 2,7-diaminopyrene (Py) to produce TpPy covalent organic frameworks (COFs). TpPy COFs are then subjected to a liquid exfoliation process to obtain TpPy CONs (< 200 nm in size and < 1.7 nm in thickness). TpPy CONs disperse well in water to provide a stable, homogeneous colloidal suspension, which shows favorable photoluminescence properties. Cell viability tests using MDA-MB-231 and RAW 264.7 cells reveal that TpPy CONs are low in cytotoxicity. Confocal microscopy reveals clear fluorescent cell images after incubation with TpPy CONs for 24 h, without reduction in cell activity or cytosolic aggregation. To investigate the biological behavior of the TpPy CONs, the authors perform an in vivo fluorescence imaging study using MDA-MB-231 tumor-bearing mice. After intravenous injection of TpPy CONs disperse in phosphate-buffered saline (PBS), persistent and strong fluorescence signals are observed in the tumor region, with low background signals from normal tissues at 1, 3, 12, and 24 h after injection. Furthermore, these in vivo imaging results concurred with ex vivo biodistribution and histological results.
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Affiliation(s)
- Seokmin Kang
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Heesu Ahn
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul, 139706, Republic of Korea
| | - Chanho Park
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Won Hyeok Yun
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Ju Gyeong Jeong
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Yong Jin Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, 75 Nowon-ro, Nowon-gu, Seoul, 139706, Republic of Korea
| | - Dong Wook Kim
- Department of Chemistry and Chemical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
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12
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Lee Y, Jin YW, Seong KM, Wilkins RC, Jang S. Improving radiation dosimetry with an automated micronucleus scoring system: correction of automated scoring errors. Radiat Environ Biophys 2023:10.1007/s00411-023-01030-7. [PMID: 37195317 DOI: 10.1007/s00411-023-01030-7] [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] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 05/01/2023] [Indexed: 05/18/2023]
Abstract
Radiation dose estimations performed by automated counting of micronuclei (MN) have been studied for their utility for triage following large-scale radiological incidents; although speed is essential, it also is essential to estimate radiation doses as accurately as possible for long-term epidemiological follow-up. Our goal in this study was to evaluate and improve the performance of automated MN counting for biodosimetry using the cytokinesis-block micronucleus (CBMN) assay. We measured false detection rates and used them to improve the accuracy of dosimetry. The average false-positive rate for binucleated cells was 1.14%; average false-positive and -negative MN rates were 1.03% and 3.50%, respectively. Detection errors seemed to be correlated with radiation dose. Correction of errors by visual inspection of images used for automated counting, called the semi-automated and manual scoring method, increased accuracy of dose estimation. Our findings suggest that dose assessment of the automated MN scoring system can be improved by subsequent error correction, which could be useful for performing biodosimetry on large numbers of people rapidly, accurately, and efficiently.
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Affiliation(s)
- Younghyun Lee
- Laboratory of Biological Dosimetry, Korea Institute of Radiological and Medical Sciences, National Radiation Emergency Medical Center, Seoul, Republic of Korea
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Republic of Korea
| | - Young Woo Jin
- Korea Institute of Radiological and Medical Sciences, National Radiation Emergency Medical Center, Seoul, Republic of Korea
| | - Ki Moon Seong
- Laboratory of Biological Dosimetry, Korea Institute of Radiological and Medical Sciences, National Radiation Emergency Medical Center, Seoul, Republic of Korea
| | - Ruth C Wilkins
- Consumer and Clinical Radiation Protection Bureau, Health Canada, Ottawa, ON, Canada
| | - Seongjae Jang
- Laboratory of Biological Dosimetry, Korea Institute of Radiological and Medical Sciences, National Radiation Emergency Medical Center, Seoul, Republic of Korea.
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13
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Yang JU, Kim S, Lee KC, Lee YJ, Kim JY, Park JA. Development of Brain-Tumor-Targeted Benzothiazole-Based Boron Complex for Boron Neutron Capture Therapy. ACS Med Chem Lett 2022; 13:1615-1620. [PMID: 36262402 PMCID: PMC9575175 DOI: 10.1021/acsmedchemlett.2c00284] [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: 06/20/2022] [Accepted: 09/12/2022] [Indexed: 11/30/2022] Open
Abstract
Boron neutron capture therapy (BNCT) is a precision treatment technology that ideally damages only boron-accumulating cells. The effectiveness of BNCT depends on the amount of boron in the tumor cells and the concentration ratio between normal and tumor tissues. Therefore, for successful brain-tumor treatment using BNCT, it is essential to develop a drug with high blood-brain barrier (BBB) permeability and high tumor accumulation. The benzothiazole-based boron complex 4-(benzo[d]thiazol-2-yl)phenylboronic acid (BTPB) is a hydrophobic, low-molecular-weight compound that has shown high BBB permeability and brain accumulation. The highest boron concentration of BTPB is 36.11 ± 2.73 μg/g (at 1 h post-injection) in the brain, and the highest brain/blood ratio is 3.94 ± 0.46 (at 2 h post-injection), which is sufficient for the BNCT drug condition. In addition, BTPB showed good tumor-targeting ability in vivo in a U87MG glioma tumor model. In this study, we conducted a biological evaluation of BTPB compared to boronophenylalanine as a novel drug for BNCT.
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Affiliation(s)
- Ji-ung Yang
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
- Department
of Medical & Biological Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Soyeon Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
- Department
of Medical & Biological Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Kyo Chul Lee
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Yong Jin Lee
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Jung Young Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Ji-Ae Park
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
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14
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Katoch N, Choi BK, Park JA, Ko IO, Kim HJ. Comparison of Five Conductivity Tensor Models and Image Reconstruction Methods Using MRI. Molecules 2021; 26:5499. [PMID: 34576970 PMCID: PMC8467711 DOI: 10.3390/molecules26185499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 06/28/2021] [Revised: 08/30/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
Imaging of the electrical conductivity distribution inside the human body has been investigated for numerous clinical applications. The conductivity tensors of biological tissue have been obtained from water diffusion tensors by applying several models, which may not cover the entire phenomenon. Recently, a new conductivity tensor imaging (CTI) method was developed through a combination of B1 mapping, and multi-b diffusion weighted imaging. In this study, we compared the most recent CTI method with the four existing models of conductivity tensors reconstruction. Two conductivity phantoms were designed to evaluate the accuracy of the models. Applied to five human brains, the conductivity tensors using the four existing models and CTI were imaged and compared with the values from the literature. The conductivity image of the phantoms by the CTI method showed relative errors between 1.10% and 5.26%. The images by the four models using DTI could not measure the effects of different ion concentrations subsequently due to prior information of the mean conductivity values. The conductivity tensor images obtained from five human brains through the CTI method were comparable to previously reported literature values. The images by the four methods using DTI were highly correlated with the diffusion tensor images, showing a coefficient of determination (R2) value of 0.65 to 1.00. However, the images by the CTI method were less correlated with the diffusion tensor images and exhibited an averaged R2 value of 0.51. The CTI method could handle the effects of different ion concentrations as well as mobilities and extracellular volume fractions by collecting and processing additional B1 map data. It is necessary to select an application-specific model taking into account the pros and cons of each model. Future studies are essential to confirm the usefulness of these conductivity tensor imaging methods in clinical applications, such as tumor characterization, EEG source imaging, and treatment planning for electrical stimulation.
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Affiliation(s)
- Nitish Katoch
- Department of Biomedical Engineering, Kyung Hee University, Seoul 02447, Korea; (N.K.); (B.-K.C.)
| | - Bup-Kyung Choi
- Department of Biomedical Engineering, Kyung Hee University, Seoul 02447, Korea; (N.K.); (B.-K.C.)
| | - Ji-Ae Park
- Division of Applied RI, Korea Institute of Radiological and Medical Science, Seoul 01812, Korea;
| | - In-Ok Ko
- Division of Applied RI, Korea Institute of Radiological and Medical Science, Seoul 01812, Korea;
| | - Hyung-Joong Kim
- Department of Biomedical Engineering, Kyung Hee University, Seoul 02447, Korea; (N.K.); (B.-K.C.)
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15
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Kim S, Yang JU, Ahn JH, Ko IO, Kim JY, Lee YJ, Park JA. Porphyrin-Based Tumor-Targeting Theranostic Agent: Gd-TDAP. ACS Med Chem Lett 2021; 12:1459-1463. [PMID: 34531954 PMCID: PMC8436409 DOI: 10.1021/acsmedchemlett.1c00283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/11/2021] [Indexed: 12/11/2022] Open
Abstract
The aim of this work was to evaluate a tumor-targeting porphyrin-based gadolinium complex (Gd-TDAP) for use as an MR/optical imaging agent and potential therapeutic agent. Gd-TDAP had higher longitudinal relaxivity (11.8 mM-1 s-1) than a commercial MRI contrast agent (Omniscan; 3.7 mM-1 s-1) in HSA solution (0.67 mM) at 3 T. The tumor-targeting characteristics were confirmed by T1-weighted MR imaging and optical imaging using an orthotopic brain tumor mouse model, which showed 1.3-fold higher uptake in tumor compared to normal brain tissues. The cell fraction data using U87MG glioblastoma cells indicated the potential for gadolinium neutron capture therapy (Gd-NCT), which requires gadolinium to be inside the cell nucleus. In addition, porphyrin derivatives can be used for photodynamic therapy (PDT), and the results demonstrated that Gd-TDAP has great potential not only as a bimodal imaging agent but also for treatment.
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Affiliation(s)
- Soyeon Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
- Department
of Medical & Biological Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Ji-ung Yang
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
- Department
of Medical & Biological Engineering, Kyungpook National University, Daegu 41566, Korea
| | - Jae Hun Ahn
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
- Graduate
School of Translational Medicine, Seoul
National University College of Medicine, Seoul 03080, Korea
| | - In Ok Ko
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Jung Young Kim
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Yong Jin Lee
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
| | - Ji-Ae Park
- Division
of Applied RI, Korea Institute of Radiological
& Medical Sciences (KIRAMS), Seoul 01812, Korea
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16
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Zhang X, Park JE, Kim EH, Hong J, Hwang KT, Kim YA, Jang CY. Wip1 controls the translocation of the chromosomal passenger complex to the central spindle for faithful mitotic exit. Cell Mol Life Sci 2021; 78:2821-2838. [PMID: 33067654 PMCID: PMC11072438 DOI: 10.1007/s00018-020-03665-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 08/12/2020] [Accepted: 10/05/2020] [Indexed: 10/23/2022]
Abstract
Dramatic cellular reorganization in mitosis critically depends on the timely and temporal phosphorylation of a broad range of proteins, which is mediated by the activation of the mitotic kinases and repression of counteracting phosphatases. The mitosis-to-interphase transition, which is termed mitotic exit, involves the removal of mitotic phosphorylation by protein phosphatases. Although protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A) drive this reversal in animal cells, the phosphatase network associated with ordered bulk dephosphorylation in mitotic exit is not fully understood. Here, we describe a new mitotic phosphatase relay in which Wip1/PPM1D phosphatase activity is essential for chromosomal passenger complex (CPC) translocation to the anaphase central spindle after release from the chromosome via PP1-mediated dephosphorylation of histone H3T3. Depletion of endogenous Wip1 and overexpression of the phosphatase-dead mutant disturbed CPC translocation to the central spindle, leading to failure of cytokinesis. While Wip1 was degraded in early mitosis, its levels recovered in anaphase and the protein functioned as a Cdk1-counteracting phosphatase at the anaphase central spindle and midbody. Mechanistically, Wip1 dephosphorylated Thr-59 in inner centromere protein (INCENP), which, subsequently bound to MKLP2 and recruited other components to the central spindle. Furthermore, Wip1 overexpression is associated with the overall survival rate of patients with breast cancer, suggesting that Wip1 not only functions as a weak oncogene in the DNA damage network but also as a tumor suppressor in mitotic exit. Altogether, our findings reveal that sequential dephosphorylation of mitotic phosphatases provides spatiotemporal regulation of mitotic exit to prevent tumor initiation and progression.
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Affiliation(s)
- Xianghua Zhang
- Drug Information Research Institute, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Ji Eun Park
- Drug Information Research Institute, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Eun Ho Kim
- Department of Biochemistry, School of Medicine, Catholic University of Daegu, Daegu, 42472, Republic of Korea
| | - Jihee Hong
- Drug Information Research Institute, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea
| | - Ki-Tae Hwang
- Department of Surgery, Seoul National University Boramae Medical Center, Seoul, 07061, Republic of Korea
| | - Young A Kim
- Department of Pathology, Seoul National University Boramae Medical Center, Seoul, 07061, Republic of Korea.
| | - Chang-Young Jang
- Drug Information Research Institute, College of Pharmacy, Sookmyung Women's University, Seoul, 04310, Republic of Korea.
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17
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Kwon TE, Chung Y, Yoo J, Ha WH, Cho M. Uncertainty quantification of bioassay functions for the internal dosimetry of radioiodine. J Radiat Res 2020; 61:860-870. [PMID: 32930725 PMCID: PMC7674691 DOI: 10.1093/jrr/rraa081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 08/10/2020] [Accepted: 08/18/2020] [Indexed: 05/06/2023]
Abstract
Bioassay functions, which are provided by the International Commission on Radiological Protection, are used to estimate the intake activity of radionuclides; however, they include considerable uncertainties in terms of the internal dosimetry for a particular individual. During a practical internal dose assessment, the uncertainty in the bioassay function is generally not introduced because of the difficulty in quantification. Therefore, to clarify the existence of uncertainty in the bioassay function and provide dosimetrists with an insight into this uncertainty, this study attempted to quantify the uncertainty in the thyroid retention function used for radioiodine exposure. The uncertainty was quantified using a probabilistic estimation of the thyroid retention function through the propagation of the distribution of biokinetic parameters by the Monte Carlo simulation technique. The uncertainties in the thyroid retention function, expressed in terms of the scattering factor, were in the ranges of 1.55-1.60 and 1.40-1.50 for within 24 h and after 24 h, respectively. In addition, the thyroid retention function within 24 h was compared with actual measurement data to confirm the uncertainty due to the use of first-order kinetics in the biokinetic model calculation. Significantly higher thyroid uptakes (by a factor of 1.9) were observed in the actual measurements. This study indicates that consideration of the uncertainty in the thyroid retention function can avoid a significant over- and under-estimation of the internal dose, particularly when a high dose is predicted.
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Affiliation(s)
- Tae-Eun Kwon
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, 01812, Seoul, Republic of Korea
- Department of Nuclear Engineering, Hanyang University, 04763, Seoul, Republic of Korea
| | - Yoonsun Chung
- Department of Nuclear Engineering, Hanyang University, 04763, Seoul, Republic of Korea
| | - Jaeryong Yoo
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, 01812, Seoul, Republic of Korea
| | - Wi-Ho Ha
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, 01812, Seoul, Republic of Korea
| | - Minsu Cho
- National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, 01812, Seoul, Republic of Korea
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18
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Kim E, Jang WI, Kim MS, Paik EK, Kim HJ, Yoo HJ, Yang K, Cho CK. Clinical utilization of radiation therapy in Korea, 2016. J Radiat Res 2020; 61:249-256. [PMID: 31913473 PMCID: PMC7246057 DOI: 10.1093/jrr/rrz095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Radiotherapy (RT) is one of the primary cancer treatment modalities. To estimate the actual utilization of RT and infrastructure in Korea, the current study was performed. Data from 2012 to 2016 were extracted from the Health Insurance Review and Assessment Service. In addition, a nationwide survey was conducted to collect the statistics of RT facilities, equipment and human resources in Korea. The total number of patients treated with RT was 72 563 in 2016. The five cancers that were most commonly treated with RT in 2016 were breast, lung, colorectal, liver and prostate cancer. According to analyses of specific treatment modalities, the number of patients treated with intensity-modulated radiotherapy (IMRT), stereotactic radiation therapy (SRT) and proton therapy increased from 6670, 6306 and 50 in 2012 to 21584, 9048 and 703 in 2016, respectively. Ninety radiation oncology centers were working in 2015 and there were a total of 213 megavoltage teletherapy machines. In 2015, 310 patients were treated per megavoltage RT machine, 246 patients per radiation oncologist, 501 patients per medical physicist and 111 patients per radiotherapy technologist. In conclusion, the number of patients who underwent RT in Korea has increased steadily from 2012 to 2016. The IMRT utilization rate remarkably increased in 2016, and the number of patients treated with advanced treatment modalities such as IMRT, SRT and proton therapy is expected to increase.
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Affiliation(s)
- Eunji Kim
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Won Il Jang
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Mi-Sook Kim
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Eun Kyung Paik
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Hee Jin Kim
- External Strategy Team, Strategic Planning Office, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Hyung Jun Yoo
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Kwangmo Yang
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Chul Koo Cho
- Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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Kim HI, Lee JS, Kwak BK, Hwang WM, Kim MJ, Kim YB, Chung SS, Park KS. Metformin Ameliorates Lipotoxic β-Cell Dysfunction through a Concentration-Dependent Dual Mechanism of Action. Diabetes Metab J 2019; 43:854-866. [PMID: 31339010 PMCID: PMC6943256 DOI: 10.4093/dmj.2018.0179] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 01/15/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Chronic exposure to elevated levels of free fatty acids contributes to pancreatic β-cell dysfunction. Although it is well known that metformin induces cellular energy depletion and a concomitant activation of AMP-activated protein kinase (AMPK) through inhibition of the respiratory chain, previous studies have shown inconsistent results with regard to the action of metformin on pancreatic β-cells. We therefore examined the effects of metformin on pancreatic β-cells under lipotoxic stress. METHODS NIT-1 cells and mouse islets were exposed to palmitate and treated with 0.05 and 0.5 mM metformin. Cell viability, glucose-stimulated insulin secretion, cellular adenosine triphosphate, reactive oxygen species (ROS) levels and Rho kinase (ROCK) activities were measured. The phosphorylation of AMPK was evaluated by Western blot analysis and mRNA levels of endoplasmic reticulum (ER) stress markers and NADPH oxidase (NOX) were measured by real-time quantitative polymerase chain reaction analysis. RESULTS We found that metformin has protective effects on palmitate-induced β-cell dysfunction. Metformin at a concentration of 0.05 mM inhibits NOX and suppresses the palmitate-induced elevation of ER stress markers and ROS levels in a AMPK-independent manner, whereas 0.5 mM metformin inhibits ROCK activity and activates AMPK. CONCLUSION This study suggests that the action of metformin on β-cell lipotoxicity was implemented by different molecular pathways depending on its concentration. Metformin at a usual therapeutic dose is supposed to alleviate lipotoxic β-cell dysfunction through inhibition of oxidative stress and ER stress.
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Affiliation(s)
- Hong Il Kim
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Korea
| | - Ji Seon Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Byung Kook Kwak
- Department of Internal Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Korea
| | - Won Min Hwang
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Division of Nephrology, Department of Internal Medicine, Konyang University College of Medicine, Seoul, Korea
| | - Min Joo Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Young Bum Kim
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul, Korea
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Sung Soo Chung
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kyong Soo Park
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
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Sajib SZK, Kwon OI, Kim HJ, Woo EJ. Electrodeless conductivity tensor imaging (CTI) using MRI: basic theory and animal experiments. Biomed Eng Lett 2018; 8:273-282. [PMID: 30603211 PMCID: PMC6208539 DOI: 10.1007/s13534-018-0066-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 03/20/2018] [Revised: 04/12/2018] [Accepted: 04/12/2018] [Indexed: 11/26/2022] Open
Abstract
The electrical conductivity is a passive material property primarily determined by concentrations of charge carriers and their mobility. The macroscopic conductivity of a biological tissue at low frequency may exhibit anisotropy related with its structural directionality. When expressed as a tensor and properly quantified, the conductivity tensor can provide diagnostic information of numerous diseases. Imaging conductivity distributions inside the human body requires probing it by externally injecting conduction currents or inducing eddy currents. At low frequency, the Faraday induction is negligible and it has been necessary in most practical cases to inject currents through surface electrodes. Here we report a novel method to reconstruct conductivity tensor images using an MRI scanner without current injection. This electrodeless method of conductivity tensor imaging (CTI) utilizes B1 mapping to recover a high-frequency isotropic conductivity image which is influenced by contents in both extracellular and intracellular spaces. Multi-b diffusion weighted imaging is then utilized to extract the effects of the extracellular space and incorporate its directional structural property. Implementing the novel CTI method in a clinical MRI scanner, we reconstructed in vivo conductivity tensor images of canine brains. Depending on the details of the implementation, it may produce conductivity contrast images for conductivity weighted imaging (CWI). Clinical applications of CTI and CWI may include imaging of tumor, ischemia, inflammation, cirrhosis, and other diseases. CTI can provide patient-specific models for source imaging, transcranial dc stimulation, deep brain stimulation, and electroporation.
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Affiliation(s)
- Saurav Z. K. Sajib
- Department of Biomedical Engineering, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Korea
| | - Oh In Kwon
- Department of Mathematics, Konkuk University, 120 Neungdongro, Gwangjin-gu, Seoul, 05029 Korea
| | - Hyung Joong Kim
- Department of Biomedical Engineering, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Korea
| | - Eung Je Woo
- Department of Biomedical Engineering, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Korea
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Abstract
Nuclear medicine is a rapidly growing discipline that employs advanced novel hybrid techniques that provide unique anatomical and functional information, as well as targets for molecular therapy. Concomitantly, there has been an increase in the attention paid to medical radiation exposure. A radiological justification for the practice of nuclear medicine has been implemented mainly through referral guidelines based on research results such as prospective randomized clinical trials. The International Commission on Radiological Protection recommends diagnostic reference levels as a practical mechanism to optimize medical radiation exposure in order to be commensurate with the medical purpose. The Korean Society of Nuclear Medicine has been implementing radiological optimization through a survey of the protocols on how each hospital determines the dose of administration of each radiopharmaceutical. In the case of nuclear medicine, radiation exposure of caregivers and comforters of patients discharged after administration of therapeutic radiopharmaceuticals can occur; therefore, optimization has been implemented through written instructions for patients, based on international recommendations. The development of patient-radiation-dose monitoring software, and a national registry and management system of patient-radiation-dose is needed to implement radiological optimization through diagnostic reference levels. This management system must work in agreement with the "Institute for Quality Management of Nuclear Medicine", and must take into account the medical reality of Korea, such as low medicine fee, in order to implement reasonable radiological justification and optimization.
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Affiliation(s)
- Byung Il Kim
- Department of Nuclear Medicine, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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