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Lee HS, Cho DW, Han JS, Han SC, Woo SK, Jun SY, Lee WJ, Yoon S, Pak SI, Lee SJ, Seong E, Park EJ. KMRC011, an agonist of toll-like receptor 5, mitigates irradiation-induced tissue damage and mortality in cynomolgus monkeys. J Immunotoxicol 2021; 17:31-42. [PMID: 32013650 DOI: 10.1080/1547691x.2019.1699617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
In the study here, the potential applicability of KMRC011 - an agonist of toll-like receptor-5 - as a countermeasure for radiation toxicities was evaluated. Following a single 5.5 Gy total body irradiation (TBI, surface absorbed dose = 7 Gy) of Co60 γ-rays, mortality rates and degrees of pathological lesions that developed over 80 days were compared in monkeys that received TBI only and a group that was injected once with KMRC011 (10 μg/kg) after TBI. Compared to the TBI-only hosts (80%), the death rate was significantly improved by the use of KMRC011 (40%), all deaths in both groups occurred in the period from Days 19-24 post-TBI. Further analysis of monkeys that survived until the end of the experiment showed that AST and ALT levels were elevated only in the TBI group, and that radiation-induced tissue damage was alleviated by the KMRC011 injection. Additionally, expression of cell death-related proteins was lower in tissues from the KMRC011-treated hosts than in those in the TBI-only group. Other measured parameters, including body weight, food uptake, and hematological values did not significantly differ between the two groups over the entire period. The results of this study, thus demonstrate that KMRC011 could potentially be used as a medical countermeasure for the treatment of acute radiation exposure.
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Affiliation(s)
- Hong-Soo Lee
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup-si, Republic of Korea
| | - Doo-Wan Cho
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup-si, Republic of Korea
| | - Ji-Seok Han
- Deptartment of Advanced Toxicology Research, Korea Institute of Toxicology, Daejeon-si, Republic of Korea
| | - Su-Cheol Han
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup-si, Republic of Korea
| | - Sang Keun Woo
- Division of RI-convergence, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Soo-Youn Jun
- iNtRON Biotechnology Inc, Seongnam-si, Republic of Korea
| | - Woo-Jong Lee
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Ulsan-si, Republic of Korea
| | - Susie Yoon
- School of Nursing, Cheju Halla University, Jeju, Republic of Korea
| | - Son-Il Pak
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon-si, Republic of Korea
| | - Sang-Jin Lee
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup-si, Republic of Korea
| | - Eunsol Seong
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin-si, Republic of Korea
| | - Eun-Jung Park
- Graduate School of East-West Medical Science, Kyung Hee University, Yongin-si, Republic of Korea
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Park EJ, Kim SN, Lee GH, Jo YM, Yoon C, Kim DW, Cho JW, Han JS, Lee SJ, Seong E, Park EJ, Oh I, Lee HS. Inhaled underground subway dusts may stimulate multiple pathways of cell death signals and disrupt immune balance. ENVIRONMENTAL RESEARCH 2020; 191:109839. [PMID: 32810496 DOI: 10.1016/j.envres.2020.109839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
In this study, we aimed to identify a toxic mechanism and the potential health effects of ambient dusts in an underground subway station. At 24 h exposure to human bronchial epithelial (BEAS-2B) cells (0, 2.5, 10, and 40 μg/mL), dusts located within autophagosome-like vacuoles, whereas a series of autophagic processes appeared to be blocked. The volume, potential and activity of mitochondria decreased in consistent with a condensed configuration, and the percentage of late apoptotic cells increased accompanying S phase arrest. While production of reactive oxygen species, expression of ferritin (heavy chain) protein, secretion of IL-6, IL-8 and matrix metalloproteinases, and the released LDH level notably increased in dust-treated cells (40 μg/mL), intracellular calcium level decreased. At day 14 after a single instillation to mice (0, 12.5, 50, and 200 μg/head), the total number of cells increased in the lungs of dust-treated mice with no significant change in cell composition. The pulmonary levels of TGF-β, GM-CSF, IL-12 and IL-13 clearly increased following exposure to dusts, whereas that of CXCL-1 was dose-dependently inhibited. Additionally, the population of cytotoxic T cells in T lymphocytes in the spleen increased relative to that of helper T cells, and the levels of IgA and IgM in the bloodstream were significantly reduced in the dust-treated mice. Subsequently, to improve the possibility of extrapolating our findings to humans, we repeatedly instilled dusts (1 time/week, 4 weeks, 0.25 and 1.0 mg/head) to monkeys. The total number of cells, the relative portion of neutrophils, the level of TNF-α significantly increased in the lungs of dust-treated monkeys, and the expression of cytochrome C was enhanced in the lung tissues. Meanwhile, the pulmonary level of MIP-α was clearly reduced, and the expression of caveolin-1 was inhibited in the lung tissues. More importantly, inflammatory lesions, such as granuloma, were seen in both mice and monkeys instilled with dusts. Taken together, we conclude that dusts may impair the host's immune function against foreign bodies by inhibiting the capacity for production of antibodies. In addition, iron metabolism may be closely associated with dust-induced cell death and inflammatory response.
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Affiliation(s)
- Eun-Jung Park
- East-West Medical Research Institute, Kyung Hee University, Seoul, 02447, South Korea.
| | - Soo-Nam Kim
- Bio-Health Convergence Institute GLP Lab, Korea Testing Certification Institute, Cheongju, 28115, South Korea
| | - Gwang-Hee Lee
- School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul, 02841, South Korea
| | - Young-Min Jo
- Department of Environmental Science and Engineering, Global Campus, Kyung Hee University, Yongin-Si, 17104, South Korea
| | - Cheolho Yoon
- Seoul Center, Korea Basic Science Institute, Seoul, 126-16, South Korea
| | - Dong-Wan Kim
- School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul, 02841, South Korea
| | - Jae-Woo Cho
- Toxicologic Pathology Research Group, Korea Institute of Toxicology, Daejeon, South Korea
| | - Ji-Seok Han
- Toxicologic Pathology Research Group, Korea Institute of Toxicology, Daejeon, South Korea
| | - Sang Jin Lee
- Jeonbuk Branch Institute, Korea Institute of Toxicology, Jeongeup, South Korea
| | - Eunsol Seong
- East-West Medical Research Institute, Kyung Hee University, Seoul, 02447, South Korea
| | - Eun-Jun Park
- East-West Medical Research Institute, Kyung Hee University, Seoul, 02447, South Korea
| | - Inkyung Oh
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, South Korea
| | - Hong-Soo Lee
- Jeonbuk Branch Institute, Korea Institute of Toxicology, Jeongeup, South Korea.
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General principles of developing novel radioprotective agents for nuclear emergency. RADIATION MEDICINE AND PROTECTION 2020. [DOI: 10.1016/j.radmp.2020.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Kim JY, Park JH, Seo SM, Park JI, Jeon HY, Lee HK, Yoo RJ, Lee YJ, Woo SK, Lee WJ, Choi CM, Choi YK. Radioprotective effect of newly synthesized toll-like receptor 5 agonist, KMRC011, in mice exposed to total-body irradiation. JOURNAL OF RADIATION RESEARCH 2019; 60:432-441. [PMID: 31165150 PMCID: PMC6640901 DOI: 10.1093/jrr/rrz024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/14/2019] [Indexed: 05/18/2023]
Abstract
Exposure to ionizing radiation leads to severe damages in radiosensitive organs and induces acute radiation syndrome, including effects on the hematopoietic system and gastrointestinal system. In this study, the radioprotective ability of KMRC011, a novel toll-like receptor 5 (TLR5) agonist, was investigated in C57BL6/N mice exposed to lethal total-body gamma-irradiation. In a 30-day survival study, KMRC011-treated mice had a significantly improved survival rate compared with control after 11 Gy total-body irradiation (TBI), and it was found that the radioprotective activity of KMRC011 depended on its dosage and repeated treatment. In a 5-day short-term study, we demonstrated that KMRC011 treatment stimulated cell proliferation and had an anti-apoptotic effect. Furthermore, KMRC011 increased the expressions of genes related to DNA repair, such as Rad21, Gadd45b, Sod2 and Irg1, in the small intestine of lethally irradiated mice. Interestingly, downregulation of NF-κB p65 in the mouse intestine by KMRC011 treatment was observed. This data indicated that KMRC011 exerted a radioprotective activity partially by regulating NF-κB signaling. Finally, peak expression levels of G-CSF, IL-6, IFN-γ, TNF-α and IP-10 induced by KMRC011 treatment were different depending on the route of administration and type of cytokine. These cytokines could be used as candidate biomarkers for the evaluation of KMRC011 clinical efficacy. Our data indicated that KMRC011 has radioprotective activity in lethally irradiated mice and may be developed as a therapeutic agent for radioprotection.
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Affiliation(s)
- Jun-Young Kim
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
| | - Jong-Hyung Park
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
- ViroMed Co., Ltd, 1, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea
| | - Sun-Min Seo
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
| | - Jin-Il Park
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
- ViroMed Co., Ltd, 1, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea
| | - Hee-Yeon Jeon
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
- Department of Core Research Laboratory, Clinical Research Institute, Kyung Hee University Hospital at Gangdong, 892, Dongnam-ro, Gangdong-gu, Seoul, Republic of Korea
| | - Han-Kyul Lee
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
| | - Ran-Ji Yoo
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, 75, Nowon-ro, Nowon-gu, Seoul, Republic of Korea
| | - Yong-Jin Lee
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, 75, Nowon-ro, Nowon-gu, Seoul, Republic of Korea
| | - Sang-Keun Woo
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, 75, Nowon-ro, Nowon-gu, Seoul, Republic of Korea
| | - Woo-Jong Lee
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, 59, Yangho-gil, Yeongcheon-si, Gyeongsangbuk-do, Republic of Korea
| | - Chi-Min Choi
- Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, 59, Yangho-gil, Yeongcheon-si, Gyeongsangbuk-do, Republic of Korea
| | - Yang-Kyu Choi
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Republic of Korea
- Corresponding author. Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea. Tel: +82-2-2049-6113; Fax: +82-2-450-3037;
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