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Lee DU, Han BS, Jung KH, Hong SS. Tumor Stroma as a Therapeutic Target for Pancreatic Ductal Adenocarcinoma. Biomol Ther (Seoul) 2024:biomolther.2024.029. [PMID: 38590092 DOI: 10.4062/biomolther.2024.029] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/10/2024] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) has a poor prognosis owing to its desmoplastic stroma. Therefore, therapeutic strategies targeting this tumor stroma should be developed. In this study, we describe the heterogeneity of cancer-associated fibroblasts (CAFs) and their diverse roles in the progression, immune evasion, and resistance to treatment of PDAC. We subclassified the spatial distribution and functional activity of CAFs to highlight their effects on prognosis and drug delivery. Extracellular matrix components such as collagen and hyaluronan are described for their roles in tumor behavior and treatment outcomes, implying their potential as therapeutic targets. We also discussed the roles of extracellular matrix (ECM) including matrix metalloproteinases and tissue inhibitors in PDAC progression. Finally, we explored the role of the adaptive and innate immune systems in shaping the PDAC microenvironment and potential therapeutic strategies, with a focus on immune cell subsets, cytokines, and immunosuppressive mechanisms. These insights provide a comprehensive understanding of PDAC and pave the way for the development of prognostic markers and therapeutic interventions.
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Affiliation(s)
- Dae Ui Lee
- Department of Medicine, College of Medicine, Inha University, Incheon 22332, Republic of Korea
| | - Beom Seok Han
- Program in Biomedical Science & Engineering, The Graduate School, Inha University, Incheon 22212, Republic of Korea
| | - Kyung Hee Jung
- Department of Medicine, College of Medicine, Inha University, Incheon 22332, Republic of Korea
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, Inha University, Incheon 22332, Republic of Korea
- Program in Biomedical Science & Engineering, The Graduate School, Inha University, Incheon 22212, Republic of Korea
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2
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Jung KH, Kim SE, Go HG, Lee YJ, Park MS, Ko S, Han BS, Yoon YC, Cho YJ, Lee P, Lee SH, Kim K, Hong SS. Synergistic Renoprotective Effect of Melatonin and Zileuton by Inhibition of Ferroptosis via the AKT/mTOR/NRF2 Signaling in Kidney Injury and Fibrosis. Biomol Ther (Seoul) 2023; 31:599-610. [PMID: 37183002 PMCID: PMC10616517 DOI: 10.4062/biomolther.2023.062] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/07/2023] [Accepted: 04/17/2023] [Indexed: 05/16/2023] Open
Abstract
According to recent evidence, ferroptosis is a major cell death mechanism in the pathogenesis of kidney injury and fibrosis. Despite the renoprotective effects of classical ferroptosis inhibitors, therapeutic approaches targeting kidney ferroptosis remain limited. In this study, we assessed the renoprotective effects of melatonin and zileuton as a novel therapeutic strategy against ferroptosis-mediated kidney injury and fibrosis. First, we identified RSL3-induced ferroptosis in renal tubular epithelial HK-2 and HKC-8 cells. Lipid peroxidation and cell death induced by RSL3 were synergistically mitigated by the combination of melatonin and zileuton. Combination treatment significantly downregulated the expression of ferroptosis-associated proteins, 4-HNE and HO-1, and upregulated the expression of GPX4. The expression levels of p-AKT and p-mTOR also increased, in addition to that of NRF2 in renal tubular epithelial cells. When melatonin (20 mg/kg) and zileuton (20 mg/kg) were administered to a unilateral ureteral obstruction (UUO) mouse model, the combination significantly reduced tubular injury and fibrosis by decreasing the expression of profibrotic markers, such as α-SMA and fibronectin. More importantly, the combination ameliorated the increase in 4-HNE levels and decreased GPX4 expression in UUO mice. Overall, the combination of melatonin and zileuton was found to effectively ameliorate ferroptosis-related kidney injury by upregulating the AKT/mTOR/ NRF2 signaling pathway, suggesting a promising therapeutic strategy for protection against ferroptosis-mediated kidney injury and fibrosis.
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Affiliation(s)
- Kyung Hee Jung
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Sang Eun Kim
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Han Gyeol Go
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Yun Ji Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Min Seok Park
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Soyeon Ko
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Beom Seok Han
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Young-Chan Yoon
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Ye Jin Cho
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Pureunchowon Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
| | - Sang-Ho Lee
- Division of Nephrology, Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul 02453, Republic of Korea
| | - Kipyo Kim
- Divison of Nephrology and Hypertension, Department of Internal Medicine, Inha University Hospital, Inha University College of Medicine, Incheon 22332, Republic of Korea
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, Incheon 22332, Republic of Korea
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Lee JE, Lee P, Yoon YC, Han BS, Ko S, Park MS, Lee YJ, Kim SE, Cho YJ, Lim JH, Ryu JK, Shim S, Kim DK, Jung KH, Hong SS. Vactosertib, TGF-β receptor I inhibitor, augments the sensitization of the anti-cancer activity of gemcitabine in pancreatic cancer. Biomed Pharmacother 2023; 162:114716. [PMID: 37086509 DOI: 10.1016/j.biopha.2023.114716] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 04/04/2023] [Accepted: 04/14/2023] [Indexed: 04/24/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) exhibits a pronounced extracellular matrix (ECM)-rich response, which is produced by an excessive amount of transforming growth factor β (TGF-β), resulting in tumor progression and metastasis. In addition, TGF-β signaling contributes to rapidly acquired resistance and incomplete response to gemcitabine. Recently, selective inhibitors of the TGF-β signaling pathway have shown promise in PDAC treatment, particularly as an option for augmenting responses to chemotherapy. Here, we investigated the synergistic anticancer effects of a small-molecule TGF-β receptor I kinase inhibitor (vactosertib/EW-7197) in the presence of gemcitabine, and its mechanism of action in pancreatic cancer. Vactosertib sensitized pancreatic cancer cells to gemcitabine by synergistically inhibiting their viability. Importantly, the combination of vactosertib and gemcitabine significantly attenuated the expression of major ECM components, including collagens, fibronectin, and α-SMA, in pancreatic cancer compared with gemcitabine alone. This resulted in potent induction of mitochondrial-mediated apoptosis, gemcitabine-mediated cytotoxicity, and inhibition of tumor ECM by vactosertib. Additionally, the combination decreased metastasis through inhibition of migration and invasion, and exhibited synergistic anti-cancer activity by inhibiting the TGF-β/Smad2 pathway in pancreatic cancer cells. Furthermore, co-treatment significantly suppressed tumor growth in orthotopic models. Therefore, our findings demonstrate that vactosertib synergistically increased the antitumor activity of gemcitabine via inhibition of ECM component production by inhibiting the TGF-β/Smad2 signaling pathway. This suggests that the combination of vactosertib and gemcitabine may be a potential treatment option for patients with pancreatic cancer.
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Affiliation(s)
- Ji Eun Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Pureunchowon Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Young-Chan Yoon
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Beom Seok Han
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Soyeon Ko
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Min Seok Park
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Yun Ji Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Sang Eun Kim
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Ye Jin Cho
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Joo Han Lim
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Ji-Kan Ryu
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea
| | - Soyeon Shim
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Dae-Kee Kim
- Graduate School of Pharmaceutical Sciences, College of Pharmacy, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Kyung Hee Jung
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea.
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Republic of Korea.
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Shin JW, Lee ER, Noh H, Kwak J, Gal JY, Park HJ, Kim S, Song HK, Seo K, Han BS. Novel Herbal Therapeutic YH23537 Improves Clinical Parameters in Ligature-Induced Periodontal Disease Model in Beagle Dogs. Int J Dent 2023; 2023:8130287. [PMID: 37159594 PMCID: PMC10163972 DOI: 10.1155/2023/8130287] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/21/2023] [Accepted: 03/27/2023] [Indexed: 05/11/2023] Open
Abstract
Currently, available medicine does not satisfy the clinical unmet needs of periodontal disease. Therefore, novel drugs with improved efficacy profiles are needed. We previously demonstrated that YH14642, water extracts of Notoginseng Radix and Rehmanniae Radix Preparata, improved probing depths in double-blind phase II clinical trial. However, it still has hurdles for commercialization due to the low efficiency of active compound extraction. To resolve this issue, we developed YH23537 through process optimization to extract active compounds efficiently while still achieving the chemical profile of YH14642. In this study, we investigated the therapeutic effects of YH23537 compared with YH14642 using a canine model of ligature-induced periodontitis. Human gingival fibroblast (hGF) cells were treated with various concentrations of YH23537 or YH14642 with lipopolysaccharide (LPS) for 24 hr. IL-6 and IL-8 levels in the conditioned media were determined using Luminex. Sixteen 3-year-old male beagle dogs had their teeth scaled and polished using a piezo-type ultrasonic scaler under general anesthesia and brushed once daily for the following 2 weeks. Two weeks after the scaling procedure, the left upper second premolar (PM2), third premolar (PM3), and fourth premolar (PM4) as well as the left lower PM3, PM4, and first molar (M1) were ligated with silk-wire twisted ligatures. The dogs were fed with soft moistened food to induce periodontitis for 8 weeks, and the ligatures were then removed. YH23537 and YH14642 were administered for 4 weeks, and clinical periodontal parameters such as plaque index (PI), gingival index (GI), probing depth (PD), clinical attachment level (CAL), and bleeding on probing (BoP) were determined before and 1, 2, 3, and 4 weeks after treatment. YH23537 inhibited IL-6 and IL-8 secretion in a dose-dependent manner in hGF cells stimulated with LPS. The IC50 values for YH23537 were 43 and 54 μg/ml for IL-6 and IL-8, respectively, while the values for YH14642 were 104 and 117 μg/ml, respectively. In the animal study, clinical parameters including GI, PD, CAL, and BoP were significantly increased after 8 weeks of ligature-induced periodontitis. The YH23537 300 and YH23537 900 mg groups had significant improvements in CAL from 1 to 4 weeks after treatment in comparison to the placebo group. GR values in the YH23537 900 mg group were decreased throughout the treatment period. GI values were also reduced significantly after 4-week treatment with 300 and 900 mg of YH23537. YH23537 at 300 mg doses showed comparable efficacy for CAL and GR with 1,000 mg of YH14642. YH23537 showed therapeutic efficacy against periodontitis in dogs, mediated by anti-inflammatory effects. These findings indicate that YH23537 has the potential for further development as a new drug for patients suffering from periodontal disease.
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Affiliation(s)
- Jang-Woo Shin
- Yuhan R&D Institute, 25 Tapsil-ro, 35 Beon-gil, Giheung-gu, Yongin-si 446-902, Gyeonggi-do, Republic of Korea
| | - Eui-Ri Lee
- Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Hyunwoo Noh
- Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Jiyoon Kwak
- Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Ji-Yeong Gal
- Yuhan R&D Institute, 25 Tapsil-ro, 35 Beon-gil, Giheung-gu, Yongin-si 446-902, Gyeonggi-do, Republic of Korea
| | - Hyun-Je Park
- Yuhan Natural Product R&D Center, Yuhan Care Co., Ltd., 25 Tapsil-ro, 35 Beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Seongkyu Kim
- Yuhan R&D Institute, 25 Tapsil-ro, 35 Beon-gil, Giheung-gu, Yongin-si 446-902, Gyeonggi-do, Republic of Korea
| | - Hyun-Kyung Song
- Department of Bio Applied Toxicology, Toxicology Research Center, Hoseo University, 20 Hoseo-ro, 79 Beon-gil, Baebang-eup, Asan-si, Chungcheongnam–do, Republic of Korea
| | - Kangmoon Seo
- Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
| | - Beom Seok Han
- Department of Bio Applied Toxicology, Toxicology Research Center, Hoseo University, 20 Hoseo-ro, 79 Beon-gil, Baebang-eup, Asan-si, Chungcheongnam–do, Republic of Korea
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Byun JS, Lee JH, Kang JS, Han BS. Comparative analysis of imaging diagnostic models for tubular basophilia and mineralization of kidney. Lab Anim Res 2022; 38:29. [PMID: 36104764 PMCID: PMC9476251 DOI: 10.1186/s42826-022-00139-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Background Now that it is possible to efficiently classify and save tissue images of laboratory animals using whole-slide imaging, many diagnostic models are being developed through transfer learning with Convolutional Neural Network (CNN). In this study, transfer learning was performed to gain toxicopathological knowledge using CNN models such as InceptionV3 and Xception. For the classification of tubular basophilia and mineralization, two representative background lesions that commonly occur in toxicological studies, accuracies of diagnosis were compared using MobileNetV2, Xception and InceptionV3. For the simultaneous detection of the two lesions, the accuracy was analysed using You Only Look Once version 4 (YOLOv4). Results The accuracy of the classification models was as follows: MobileNetV2 (epoch 50, accuracy: 98.57%) > Xception (epoch 70, accuracy: 97.47%) > InceptionV3 (epoch 70, accuracy: 89.62%). In the case of object detection, the accuracy of YOLOv4 was 98.62% at epoch 3000.
Conclusions Among the classification models, MobileNetV2 had the best accuracy despite applying a lower epoch than InceptionV3 and Xception. The object detection model, YOLOv4, accurately and simultaneously diagnosed tubular basophilia and mineralization, with an accuracy of 98.62% at epoch 3000.
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Ko S, Jung KH, Yoon YC, Han BS, Park MS, Lee YJ, Kim SE, Cho YJ, Lee P, Lim JH, Ryu JK, Kim K, Kim TY, Hong S, Lee SH, Hong SS. A novel DDR1 inhibitor enhances the anticancer activity of gemcitabine in pancreatic cancer. Am J Cancer Res 2022; 12:4326-4342. [PMID: 36225647 PMCID: PMC9548003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/04/2022] [Indexed: 06/16/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is an extracellular matrix (ECM)-rich carcinoma, which promotes chemoresistance by inhibiting drug diffusion into the tumor. Discoidin domain receptor 1 (DDR1) increases tumor progression and drug resistance by binding to collagen, a major component of tumor ECM. Therefore, DDR1 inhibition may be helpful in cancer therapeutics by increasing drug delivery efficiency and improving drug sensitivity. In this study, we developed a novel DDR1 inhibitor, KI-301690 and investigated whether it could improve the anticancer activity of gemcitabine, a cytotoxic agent widely used for the treatment of pancreatic cancer. KI-301690 synergized with gemcitabine to suppress the growth of pancreatic cancer cells. Importantly, its combination significantly attenuated the expression of major tumor ECM components including collagen, fibronectin, and vimentin compared to gemcitabine alone. Additionally, this combination effectively decreased mitochondrial membrane potential (MMP), thereby inducing apoptosis. Further, the combination synergistically inhibited cell migration and invasion. The enhanced anticancer efficacy of the co-treatment could be explained by the inhibition of DDR1/PYK2/FAK signaling, which significantly reduced tumor growth in a pancreatic xenograft model. Our results demonstrate that KI-301690 can inhibit aberrant ECM expression by DDR1/PYK2/FAK signaling pathway blockade and attenuation of ECM-induced chemoresistance observed in desmoplastic pancreatic tumors, resulting in enhanced antitumor effect through effective induction of gemcitabine apoptosis.
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Affiliation(s)
- Soyeon Ko
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Kyung Hee Jung
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Young-Chan Yoon
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Beom Seok Han
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Min Seok Park
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Yun Ji Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Sang Eun Kim
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Ye Jin Cho
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Pureunchowon Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Joo Han Lim
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Ji-Kan Ryu
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
| | - Kewon Kim
- Center for Catalytic Hydrocarbon Functionalization, Institute of Basic Science (IBS) and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST)Daejeon 34141, Korea
| | - Tae Young Kim
- Chemical Kinomics Research Center, Korea Institute of Science and TechnologySeoul 02792, Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalization, Institute of Basic Science (IBS) and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST)Daejeon 34141, Korea
| | - So Ha Lee
- Chemical Kinomics Research Center, Korea Institute of Science and TechnologySeoul 02792, Korea
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University3-ga, Sinheung-dong, Jung-gu, Incheon 22332, Korea
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Seo MS, Jung KH, Kim K, Lee JE, Han BS, Ko S, Kim JH, Hong S, Lee SH, Hong SS. Discovery of a novel NUAK1 inhibitor against pancreatic cancer. Biomed Pharmacother 2022; 152:113241. [PMID: 35691157 DOI: 10.1016/j.biopha.2022.113241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 11/15/2021] [Revised: 05/31/2022] [Accepted: 06/02/2022] [Indexed: 12/24/2022] Open
Abstract
The novel (nua) kinase family 1 (NUAK1) is an AMPK-related kinase and its expression is associated with tumor malignancy and poor prognosis in several types of cancer, suggesting its potential as a target for cancer therapy. Therefore, the development of NUAK1-targeting inhibitors could improve therapeutic outcomes in cancer. We synthesized KI-301670, a novel NUAK1 inhibitor, and assessed its anticancer effects and mechanism of action in pancreatic cancer. It effectively inhibited pancreatic cancer growth and proliferation, and induced cell cycle arrest, markedly G0/G1 arrest, by increasing the expression of p27 and decreasing expression of p-Rb and E2F1. Additionally, the apoptotic effect of KI-301670 was observed by an increase in cleaved PARP, TUNEL-positive cells, and annexin V cell population, as well as the release of cytochrome c via the loss of mitochondrial membrane potential. KI-301670 inhibited the migration and invasion of pancreatic cancer cells. Mechanistically, KI-301670 effectively inhibited the PI3K/AKT pathway in pancreatic cancer cells. Furthermore, it significantly attenuated tumor growth in a mouse xenograft tumor model. Our results demonstrate that a novel NUAK1 inhibitor, KI-301670, exerts anti-tumor effects by directly suppressing cancer cell growth by affecting the PI3K/AKT pathway, suggesting that it could be a novel therapeutic candidate for pancreatic cancer treatment.
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Affiliation(s)
- Myeong-Seong Seo
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea
| | - Kyung Hee Jung
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea
| | - Kewon Kim
- Center for Catalytic Hydrocarbon Functionalization, Institute of Basic Science (IBS) and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Ji Eun Lee
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea
| | - Beom Seok Han
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea
| | - Soyeon Ko
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea
| | - Jae Ho Kim
- Chemical Kinomics Research Center, Institute of Science and Technology, Seoul 02792, South Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon Functionalization, Institute of Basic Science (IBS) and Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea.
| | - So Ha Lee
- Chemical Kinomics Research Center, Institute of Science and Technology, Seoul 02792, South Korea.
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, and Program in Biomedical Science & Engineering, Inha University, 3-ga, Sinheung-dong, Jung-gu, Incheon 22332, South Korea.
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Han BS, Jung KH, Lee JE, Yoon YC, Ko S, Park MS, Lee YJ, Kim SE, Cho YJ, Lee P, Lim JH, Jang E, Kim H, Hong SS. Lidocaine enhances the efficacy of palbociclib in triple-negative breast cancer. Am J Cancer Res 2022; 12:3083-3098. [PMID: 35968350 PMCID: PMC9360229] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023] Open
Abstract
The use of anesthetics in the surgical resection of tumors may influence the prognosis of cancer patients. Lidocaine, a local anesthetic, is known to act as a chemosensitizer and relieve pain in some cancers. In addition, palbociclib, a potent cyclin-dependent kinase (CDK) 4/6 inhibitor, has been approved for chemotherapy of advanced breast cancer. However, recent studies have revealed the acquired resistance of breast cancer cells to palbociclib. Therefore, the development of combination therapies that can extend the efficacy of palbociclib or delay resistance is crucial. This study investigated whether lidocaine would enhance the efficacy of palbociclib in breast cancer. Lidocaine synergistically suppressed the growth and proliferation of breast cancer cells by palbociclib. The combination treatment showed an increased cell cycle arrest in the G0/G1 phase by decreasing retinoblastoma protein (Rb) and E2F1 expression. In addition, it increased apoptosis by loss of mitochondrial membrane potential as observed by increases in cytochrome c release and inhibition of mitochondria-mediated protein expression. Additionally, it significantly reduced epithelial-mesenchymal transition and PI3K/AKT/GSK3β signaling. In orthotopic breast cancer models, this combination treatment significantly inhibited tumor growth and increased tumor cell apoptosis compared to those treated with a single drug. Taken together, this study demonstrates that the combination of palbociclib and lidocaine has a synergistic anti-cancer effect on breast cancer cells by the inhibition of the PI3K/AKT/GSK3β pathway, suggesting that this combination could potentially be an effective therapy for breast cancer.
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Affiliation(s)
- Beom Seok Han
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Kyung Hee Jung
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Ji Eun Lee
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Young-Chan Yoon
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Soyeon Ko
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Min Seok Park
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Yun Ji Lee
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Sang Eun Kim
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Ye Jin Cho
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Pureunchowon Lee
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Joo Han Lim
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Eunsoo Jang
- Department of Anaesthesiology and Pain Medicine, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Hyunzu Kim
- Department of Anaesthesiology and Pain Medicine, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
| | - Soon-Sun Hong
- Department of Medicine, College of Medicine, Program in Biomedical Science & Engineering, Inha University366, Seohae-daero, Jung-gu, Incheon 22332, Korea
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9
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Lee HN, Seo HD, Kim EM, Han BS, Kang JS. Classification of Mouse Lung Metastatic Tumor with Deep Learning. Biomol Ther (Seoul) 2021; 30:179-183. [PMID: 34725310 PMCID: PMC8902456 DOI: 10.4062/biomolther.2021.130] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/31/2021] [Accepted: 09/13/2021] [Indexed: 11/26/2022] Open
Abstract
Traditionally, pathologists microscopically examine tissue sections to detect pathological lesions; the many slides that must be evaluated impose severe work burdens. Also, diagnostic accuracy varies by pathologist training and experience; better diagnostic tools are required. Given the rapid development of computer vision, automated deep learning is now used to classify microscopic images, including medical images. Here, we used a Inception-v3 deep learning model to detect mouse lung metastatic tumors via whole slide imaging (WSI); we cropped the images to 151 by 151 pixels. The images were divided into training (53.8%) and test (46.2%) sets (21,017 and 18,016 images, respectively). When images from lung tissue containing tumor tissues were evaluated, the model accuracy was 98.76%. When images from normal lung tissue were evaluated, the model accuracy (“no tumor”) was 99.87%. Thus, the deep learning model distinguished metastatic lesions from normal lung tissue. Our approach will allow the rapid and accurate analysis of various tissues.
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Affiliation(s)
- Ha Neul Lee
- Department of Biomedical, Laboratory Science, Namseoul University, Cheonan 31020, Republic of Korea
| | - Hong-Deok Seo
- Department of Industrial Promotion, Spatial Information Industry Promotion Agency, Seongnam 13487, Republic of Korea
| | - Eui-Myoung Kim
- Department of Spatial Information Engineering, Namseoul University, Cheonan 31020, Republic of Korea
| | - Beom Seok Han
- Department of Pharmaceutical Engineering, Hoseo University, Asan 31499, Republic of Korea
| | - Jin Seok Kang
- Department of Biomedical, Laboratory Science, Namseoul University, Cheonan 31020, Republic of Korea
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10
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Joshi A, Khan MS, Soomro S, Niaz A, Han BS, Choi KN. SRIS: Saliency-Based Region Detection and Image Segmentation of COVID-19 Infected Cases. IEEE Access 2020; 8:190487-190503. [PMID: 34976559 PMCID: PMC8545283 DOI: 10.1109/access.2020.3032288] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 06/14/2023]
Abstract
Noise or artifacts in an image, such as shadow artifacts, deteriorate the performance of state-of-the-art models for the segmentation of an image. In this study, a novel saliency-based region detection and image segmentation (SRIS) model is proposed to overcome the problem of image segmentation in the existence of noise and intensity inhomogeneity. Herein, a novel adaptive level-set evolution protocol based on the internal and external functions is designed to eliminate the initialization sensitivity, thereby making the proposed SRIS model robust to contour initialization. In the level-set energy function, an adaptive weight function is formulated to adaptively alter the intensities of the internal and external energy functions based on image information. In addition, the sign of energy function is modulated depending on the internal and external regions to eliminate the effects of noise in an image. Finally, the performance of the proposed SRIS model is illustrated on complex real and synthetic images and compared with that of the previously reported state-of-the-art models. Moreover, statistical analysis has been performed on coronavirus disease (COVID-19) computed tomography images and THUS10000 real image datasets to confirm the superior performance of the SRIS model from the viewpoint of both segmentation accuracy and time efficiency. Results suggest that SRIS is a promising approach for early screening of COVID-19.
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Affiliation(s)
- Aditi Joshi
- Department of Computer Science and EngineeringChung-Ang UniversitySeoul06974South Korea
| | - Mohammed Saquib Khan
- Department of Electrical and Electronics EngineeringChung-Ang UniversitySeoul06974South Korea
| | - Shafiullah Soomro
- Quaid-e-Awam University of Engineering, Science and TechnologyNawabshah77150Pakistan
| | - Asim Niaz
- STARS TeamINRIA06902Sophia AntipolisFrance
| | - Beom Seok Han
- School of Food and Pharmaceutical EngineeringHoseo UniversityAsan31449South Korea
| | - Kwang Nam Choi
- Department of Computer Science and EngineeringChung-Ang UniversitySeoul06974South Korea
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11
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Jung KH, Son MK, Yan HH, Fang Z, Kim J, Kim SJ, Park JH, Lee JE, Yoon Y, Seo MS, Han BS, Ko S, Suh YJ, Lim JH, Lee D, Teo Z, Wee JWK, Tan NS, Hong S. ANGPTL4 exacerbates pancreatitis by augmenting acinar cell injury through upregulation of C5a. EMBO Mol Med 2020; 12:e11222. [PMID: 32638512 PMCID: PMC7411571 DOI: 10.15252/emmm.201911222] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 05/29/2020] [Accepted: 05/29/2020] [Indexed: 01/08/2023] Open
Abstract
Pancreatitis is the inflammation of the pancreas. However, little is known about the genes associated with pancreatitis severity. Our microarray analysis of pancreatic tissues from mild and severe acute pancreatitis mice models identified angiopoietin-like 4 (ANGPTL4) as one of the most significantly upregulated genes. Clinically, ANGPTL4 expression was also increased in the serum and pancreatic tissues of pancreatitis patients. The deficiency in ANGPTL4 in mice, either by gene deletion or neutralizing antibody, mitigated pancreatitis-associated pathological outcomes. Conversely, exogenous ANGPTL4 exacerbated pancreatic injury with elevated cytokine levels and apoptotic cell death. High ANGPTL4 enhanced macrophage activation and infiltration into the pancreas, which increased complement component 5a (C5a) level through PI3K/AKT signaling. The activation of the C5a receptor led to hypercytokinemia that accelerated acinar cell damage and furthered pancreatitis. Indeed, C5a neutralizing antibody decreased inflammatory response in LPS-activated macrophages and alleviated pancreatitis severity. In agreement, there was a significant positive correlation between C5a and ANGPTL4 levels in pancreatitis patients. Taken together, our study suggests that targeting ANGPTL4 is a potential strategy for the treatment of pancreatitis.
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Affiliation(s)
- Kyung Hee Jung
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Mi Kwon Son
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Hong Hua Yan
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Zhenghuan Fang
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Juyoung Kim
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Soo Jung Kim
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Jung Hee Park
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Ji Eun Lee
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Young‐Chan Yoon
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Myeong Seong Seo
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Beom Seok Han
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Soyeon Ko
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Young Ju Suh
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Joo Han Lim
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Don‐Haeng Lee
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
| | - Ziqiang Teo
- School of Biological ScienceCollege of ScienceNanyang Technological University SingaporeSingapore CitySingapore
| | - Jonathan Wei Kiat Wee
- School of Biological ScienceCollege of ScienceNanyang Technological University SingaporeSingapore CitySingapore
| | - Nguan Soon Tan
- School of Biological ScienceCollege of ScienceNanyang Technological University SingaporeSingapore CitySingapore
- Lee Kong Chian School of MedicineNanyang Technological University SingaporeSingapore CitySingapore
| | - Soon‐Sun Hong
- Department of MedicineCollege of MedicineInha UniversityIncheonKorea
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12
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Lee TH, Park DS, Jang JY, Lee I, Kim JM, Choi GS, Oh CT, Kim JY, Han HJ, Han BS, Joh JW. Human Placenta Hydrolysate Promotes Liver Regeneration via Activation of the Cytokine/Growth Factor-Mediated Pathway and Anti-oxidative Effect. Biol Pharm Bull 2019; 42:607-616. [PMID: 30930420 DOI: 10.1248/bpb.b18-00712] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Liver regeneration is a very complex process and is regulated by several cytokines and growth factors. It is also known that liver transplantation and the regeneration process cause massive oxidative stress, which interferes with liver regeneration. The placenta is known to contain various physiologically active ingredients such as cytokines, growth factors, and amino acids. In particular, human placenta hydrolysate (hPH) has been found to contain many amino acids. Most of the growth factors found in the placenta are known to be closely related to liver regeneration. Therefore, in this study, we investigated whether hPH is effective in promoting liver regeneration in rats undergoing partial hepatectomy. We confirmed that cell proliferation was significantly increased in HepG2 and human primary cells. Hepatocyte proliferation was also promoted in partial hepatectomized rats by hPH treatment. hPH increased liver regeneration rate, double nucleic cell ratio, mitotic cell ratio, proliferating cell nuclear antigen (PCNA), and Ki-67 positive cells in vivo as well as interleukin (IL)-6, tumor necrosis factor alpha (TNF-α), and hepatocyte growth factor (HGF). Moreover, Kupffer cells secreting IL-6 and TNF-α were activated by hPH treatment. In addition, hPH reduced thiobarbituric acid reactive substances (TBARs) and significantly increased glutathione (GSH), glutathione peroxidase (GPx), and superoxide dismutase (SOD). Taken together, these results suggest that hPH promotes liver regeneration by activating cytokines and growth factors associated with liver regeneration and eliminating oxidative stress.
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Affiliation(s)
- Tae Hee Lee
- Hoseo Toxicological Research Center, Hoseo University
| | - Dong Sun Park
- Department of Biology Education, Korea National University of Education
| | - Ja Young Jang
- Hoseo Toxicological Research Center, Hoseo University
| | - Isaac Lee
- Hoseo Toxicological Research Center, Hoseo University
| | - Jong Man Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Gyu Seong Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Chang Taek Oh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Jeom Yong Kim
- Research & Development center, Green Cross WellBeing Corporation
| | - Hae Jung Han
- Research & Development center, Green Cross WellBeing Corporation
| | - Beom Seok Han
- Hoseo Toxicological Research Center, Hoseo University
| | - Jae Won Joh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine
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13
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Han BS, Kim KS, Kim YJ, Van Minh N, Jung HY, Sohn MJ, Kim Won G. Nurr1-Activating Daphnane Diterpenes from Daphne genkwa and its Neuroprotective Effect in an Animal Model of Parkinson's Disease. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- BS Han
- Functional Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - KS Kim
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - YJ Kim
- Superbacteria Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - N Van Minh
- Superbacteria Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - HY Jung
- Functional Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - MJ Sohn
- Superbacteria Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
| | - G Kim Won
- Superbacteria Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea, Republic of (South)
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14
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Kang WG, Pyo SH, Alkhuraiji TS, Han BS, Kang CM. Radiation shielding analysis of a special linear accelerator for electron beam and X-ray. J Xray Sci Technol 2017; 25:505-514. [PMID: 28157115 DOI: 10.3233/xst-16196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The King AbdulAziz City for Science & Technology in the Kingdom of Saudi Arabia plans to build a 10 MeV, 15 kW linear accelerator (LINAC) for electron beam and X-ray. The accelerator will be supplied by EB Tech, Republic of Korea, and the design and construction of the accelerator building will be conducted in the cooperation with EB Tech. This report presents the shielding analysis of the accelerator building using the Monte Carlo N-Particle Transport Code (MCNP). In order to improve the accuracy in estimating deep radiation penetration and to reduce computation time, various variance reduction techniques, including the weight window (WW) method, the deterministic transport (DXTRAN) spheres were considered. Radiation levels were estimated at selected locations in the shielding facility running MCNP6 for particle histories up to 1.0×10+8. The final results indicated that the calculated doses at all selected detector locations met the dose requirement of 50 mSv/yr, which is the United State Nuclear Regulatory Commission (U.S. NRC) requirement.
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Affiliation(s)
- W G Kang
- EB Tech Co., Ltd., 170-9, Techno 2-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - S H Pyo
- EB Tech Co., Ltd., 170-9, Techno 2-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - T S Alkhuraiji
- King AbdulAziz City for Science & Technology (KACST), Riyadh, Kingdom of Saudi Arabia
| | - B S Han
- EB Tech Co., Ltd., 170-9, Techno 2-ro, Yuseong-gu, Daejeon, Republic of Korea
| | - C M Kang
- EB Tech Co., Ltd., 170-9, Techno 2-ro, Yuseong-gu, Daejeon, Republic of Korea
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15
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Lee YH, Kim D, Lee MJ, Kim MJ, Jang HS, Park SH, Lee JM, Lee HY, Park CB, Han BS, Son WC, Kang JS, Kang JK. Subchronic toxicity of Acorus gramineus rhizoma in rats. J Ethnopharmacol 2016; 183:46-53. [PMID: 26924566 DOI: 10.1016/j.jep.2016.02.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 01/29/2016] [Accepted: 02/25/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Acorus gramineus rhizoma (AGR) is the dry rhizome of Acorus gramineus Solander from the family Araceae that has been used as sedative, analgesic, diuretic, digestive and antifungal agent. AIM OF THE STUDY To evaluate the no-observed-adverse-effect level (NOAEL) and the toxicity of AGR, following repeated oral administration to rats for 13 weeks. MATERIALS AND METHODS AGR was administered by oral gavage to groups of rats (10 per group, each sex) at doses of 0 (control), 25, 74, 222, 667, or 2,000mg/kg/day, 5 times per week for 13 weeks. Mortality, clinical signs, body weights, food consumption, hematology, serum chemistry, urinalysis, vaginal cytology, sperm motility, sperm morphology, organ weights, gross and histopathological findings were compared between control and AGR groups. RESULTS No mortality or remarkable clinical signs were observed during this 13-week study. No adverse effects on body weight, food consumption, urinalysis, hematology, serum chemistry, organ weights, gross lesion, histopathology, vaginal cytology, sperm motility or deformity were observed in any of the male or female rats treated with AGR. CONCLUSIONS On the basis of these results, the NOAEL of AGR is determined to be 2,000mg/kg/day for male and female rats.
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Affiliation(s)
- Yong-Hoon Lee
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea; Pathology Department, Chronic Inhalation Toxicity Research Center, Chemicals Toxicity Research Bureau, Occupational Safety and Health Research Institute, KOSHA, 339-30 Expo-ro, Yuseong-gu, Daejeon 305-380, Republic of Korea
| | - Duyeol Kim
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Mi Ju Lee
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Myoung Jun Kim
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Ho-Song Jang
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Sun Hee Park
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Jung-Min Lee
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea; Department of Biomedical Laboratory Science, Namseoul University, 91 Daehak-ro, Seonghwan-eup, Sebuk-gu, Cheonan, Chungnam 331-707, Republic of Korea
| | - Hye-Yeong Lee
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Cheol-Beom Park
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea
| | - Beom Seok Han
- Division of Toxicopathology, Hoseo Toxicology Research Center, Hoseo University, 79 Hoseo-ro, BaeBang-Myeon, Asan, Chungnam 336-795, Republic of Korea
| | - Woo-Chan Son
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, 91 Daehak-ro, Seonghwan-eup, Sebuk-gu, Cheonan, Chungnam 331-707, Republic of Korea.
| | - Jong-Koo Kang
- Pathology Team, Biotoxtech Co., Ltd., 53 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju, Chungbuk 363-883, Republic of Korea; Department of Laboratory Animal medicine, College of Veterinary medicine, Chungbuk National University, 52 Naesudong-ro, Seowon-gu, Cheongju, Chungbuk 361-763, Republic of Korea.
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16
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Kim YR, Lee SY, Lee EJ, Park SH, Seong NW, Seo HS, Shin SS, Kim SJ, Meang EH, Park MK, Kim MS, Kim CS, Kim SK, Son SW, Seo YR, Kang BH, Han BS, An SSA, Lee BJ, Kim MK. Toxicity of colloidal silica nanoparticles administered orally for 90 days in rats. Int J Nanomedicine 2014; 9 Suppl 2:67-78. [PMID: 25565827 PMCID: PMC4279771 DOI: 10.2147/ijn.s57925] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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: 01/09/2023] Open
Abstract
This study was undertaken to investigate the potential toxicity and establish the no observed adverse effect level (NOAEL) and target organ(s) of negatively charged colloidal silica particles of different sizes, ie, SiO2EN20(−) (20 nm) or SiO2EN100(−) 2(100 nm), administered by gavage in Sprague-Dawley rats. After verification of the physicochemical properties of the SiO2 particles to be tested, a preliminary dose range-finding study and 90-day repeated dose study were conducted according to the Organisation for Economic Cooperation and Development test guideline. Based on the results of the 14-day dose range-finding study, a high dose was determined to be 2,000 mg/kg, and middle and low doses were set at 1,000 and 500 mg/kg, respectively. In the 90-day toxicity study, there were no animal deaths in relation to administration of SiO2 particles of either size. In addition, no treatment-related clinical changes or histopathological findings were observed in any of the experimental groups. Moreover, no difference in toxic effects from chronic exposure to SiO2EN20(−)(20 nm) or SiO2EN100(−) (100 nm) was observed. The results of this study indicate that the NOAEL for SiO2EN20(−) and SiO2EN100(−) would most likely be 2,000 mg/kg, and no target organ was identified in rats of either sex.
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Affiliation(s)
- Yu-Ri Kim
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Republic of Korea
| | - Seung-Young Lee
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Eun Jeong Lee
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Republic of Korea
| | - Sung Ha Park
- Department of Biochemistry, University of Bath, Bath, UK
| | - Nak-won Seong
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Heung-Sik Seo
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Sung-Sup Shin
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Seon-Ju Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Eun-Ho Meang
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Myeong-Kyu Park
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Min-Seok Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Republic of Korea
| | - Cheol-Su Kim
- Department of Microbiology, Wonju College of Medicine, Yonsei University, Gangwon, Republic of Korea
| | - Soo-Ki Kim
- Department of Microbiology, Wonju College of Medicine, Yonsei University, Gangwon, Republic of Korea
| | - Sang Wook Son
- Department of Dermatology, Korea University Medical School and College, Seoul, Republic of Korea
| | - Young Rok Seo
- Department of Life Science, Institute of Environmental Medicine for Green Chemistry, Dongguk University, Seoul, Republic of Korea
| | - Boo Hyon Kang
- Nonclinical Research Institute, Chemon Inc, Gyeonggi, Republic of Korea
| | - Beom Seok Han
- Toxicological Research Center, Hoseo University, Chungnam, Republic of Korea
| | - Seong Soo A An
- Department of Bionanotechnology, Gachon University, Gyeonggi, Republic of Korea
| | - Beom-Jun Lee
- College of Veterinary Medicine, Chungbuk National University, Chungbuk, Republic of Korea
| | - Meyoung-Kon Kim
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Republic of Korea
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17
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Kim YR, Park JI, Lee EJ, Park SH, Seong NW, Kim JH, Kim GY, Meang EH, Hong JS, Kim SH, Koh SB, Kim MS, Kim CS, Kim SK, Son SW, Seo YR, Kang BH, Han BS, An SSA, Yun HI, Kim MK. Toxicity of 100 nm zinc oxide nanoparticles: a report of 90-day repeated oral administration in Sprague Dawley rats. Int J Nanomedicine 2014; 9 Suppl 2:109-26. [PMID: 25565830 PMCID: PMC4279774 DOI: 10.2147/ijn.s57928] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Nanoparticles (NPs) are used commercially in health and fitness fields, but information about the toxicity and mechanisms underlying the toxic effects of NPs is still very limited. The aim of this study is to investigate the toxic effect(s) of 100 nm negatively (ZnOAE100[−]) or positively (ZnOAE100[+]) charged zinc oxide (ZnO) NPs administered by gavage in Sprague Dawley rats, to establish a no observed adverse effect level, and to identify target organ(s). After verification of the primary particle size, morphology, hydrodynamic size, and zeta potential of each test article, we performed a 90-day study according to Organisation for Economic Co-operation and Development test guideline 408. For the 90-day study, the high dose was set at 500 mg/kg and the middle and low doses were set at 125 mg/kg and 31.25 mg/kg, respectively. Both ZnO NPs had significant changes in hematological and blood biochemical analysis, which could correlate with anemia-related parameters, in the 500 mg/kg groups of both sexes. Histopathological examination showed significant adverse effects (by both test articles) in the stomach, pancreas, eye, and prostate gland tissues, but the particle charge did not affect the tendency or the degree of the lesions. We speculate that this inflammatory damage might result from continuous irritation caused by both test articles. Therefore, the target organs for both ZnOAE100(−) and ZnOAE100(+) are considered to be the stomach, pancreas, eye, and prostate gland. Also, the no observed adverse effect level for both test articles was identified as 31.25 mg/kg for both sexes, because the adverse effects were observed at all doses greater than 125 mg/kg.
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Affiliation(s)
- Yu-Ri Kim
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Korea
| | - Jong-Il Park
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Eun Jeong Lee
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Korea
| | - Sung Ha Park
- Department of Biochemistry, University of Bath, Bath, UK
| | - Nak-won Seong
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Jun-Ho Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Geon-Yong Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Eun-Ho Meang
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Jeong-Sup Hong
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Su-Hyon Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Sang-Bum Koh
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Min-Seok Kim
- General Toxicology Team, Korea Testing and Research Institute, Seoul, Korea
| | - Cheol-Su Kim
- Department of Microbiology, Wonju College of Medicine, Yonsei University, Wonju-si, Gangwon, Korea
| | - Soo-Ki Kim
- Department of Microbiology, Wonju College of Medicine, Yonsei University, Wonju-si, Gangwon, Korea
| | - Sang Wook Son
- Department of Life Science, Institute of Environmental Medicine for Green Chemistry, Dongguk University, Seoul, Korea
| | - Young Rok Seo
- Nonclinical Research Institute, Chemon Inc., Yongin, Gyeonggi, Korea
| | - Boo Hyon Kang
- Toxicological Research Center, Hoseo University, Ansan, Chungnam, Korea
| | - Beom Seok Han
- Department of Bionanotechnology, Gachon University, Seongnam, Gyeonggi, Korea
| | - Seong Soo A An
- College of Veterinary Medicine, Chungnam National University, Daejon, Korea
| | - Hyo-In Yun
- College of Veterinary Medicine, Chungnam National University, Daejon, Korea
| | - Meyoung-Kon Kim
- Department of Biochemistry and Molecular Biology, Korea University Medical School and College, Seoul, Korea
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Park EJ, Lee GH, Han BS, Lee BS, Lee S, Cho MH, Kim JH, Kim DW. Toxic response of graphene nanoplatelets in vivo and in vitro. Arch Toxicol 2014; 89:1557-68. [DOI: 10.1007/s00204-014-1303-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 06/17/2014] [Indexed: 10/25/2022]
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Yoon H, Choe M, Cho HJ, Han BS, Park KH, Oh JA, Cho N, Paik MK. Study of Kidney Toxicity of Azadirachta Indica Extract for Oral Administration in Rats. ACTA ACUST UNITED AC 2014. [DOI: 10.5338/kjea.2014.33.2.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Lee YH, Kim D, Lee MJ, Kim MJ, Jang HS, Park SH, Lee JM, Lee HY, Han BS, Son WC, Seok JH, Lee JK, Jeong J, Kang JS, Kang JK. Subchronic toxicity study of Coptidis rhizoma in rats. J Ethnopharmacol 2014; 152:457-463. [PMID: 24486210 DOI: 10.1016/j.jep.2014.01.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 12/26/2013] [Accepted: 01/14/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Coptidis Rhizoma (CR) is a medical herb from the family Ranunculacease that has been used to treat gastroenteritis, dysentery, diabetes mellitus, and severe skin diseases. AIM OF THE STUDY To evaluate the no-observed-adverse-effect level (NOAEL) and the toxicity of CR, following repeat oral administration to rats for 13 weeks. MATERIALS AND METHODS CR was administered by oral gavage to groups of rats (n=10/group, each sex) at dose levels of 0 (control), 25, 74, 222, 667 or 2000 mg/kg/day 5 times per week for 13 weeks. Mortality, clinical signs, body weights, food consumption, hematology, serum chemistry, urinalysis, vaginal cytology and sperm morphology, organ weights, gross and histopathological findings were compared between control and CR groups. RESULTS Urinalysis showed a significant increase in N-acety1-β-glucosaminidase in males in the 2000 mg/kg/day group (P<0.01). However, no mortality or remarkable clinical signs were observed during this 13-week study. No adverse effects on body weight, food consumption, hematology, serum chemistry, organ weights, gross lesion, histopathology, vaginal cytology, sperm motility, or deformity were observed in the males or female rats treated with CR. CONCLUSIONS On the basis of these results, the NOAEL of CR is determined to be 667 mg/kg/day for males and 2000 mg/kg/day for females.
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Affiliation(s)
- Yong-Hoon Lee
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Duyeol Kim
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Mi Ju Lee
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Myoung Jun Kim
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Ho-Song Jang
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Sun Hee Park
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Jung-Min Lee
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea; Department of Biomedical Laboratory Science, Namseoul University, 21 Maeju-ri, Seonghwan-eup, Cheonan 331-707, Chungnam, Republic of Korea
| | - Hye-Yeong Lee
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea
| | - Beom Seok Han
- Division of Toxicopathology, Hoseo Toxicology Research Center, Hoseo University, 79 Hoseo-ro, BaeBang-Myeon, Asan 336-795, Chungnam, Republic of Korea
| | - Woo-Chan Son
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - Ji Hyeon Seok
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon 363-700, Chungbuk, Republic of Korea
| | - Jong Kwon Lee
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon 363-700, Chungbuk, Republic of Korea
| | - Jayoung Jeong
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon 363-700, Chungbuk, Republic of Korea
| | - Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, 21 Maeju-ri, Seonghwan-eup, Cheonan 331-707, Chungnam, Republic of Korea.
| | - Jong-Koo Kang
- Department of Pathology, Biotoxtech Co., Ltd, 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun 363-883, Chungbuk, Republic of Korea; Department of Laboratory Animal Medicine, College of Veterinary Medicine, Chungbuk National University, 410 Naesudong-ro, Heungdeok-gu, Cheongju 361-763, Chungbuk, Republic of Korea.
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Kim D, Lee YH, Park SH, Lee MJ, Kim MJ, Jang HS, Lee JM, Lee HY, Han BS, Son WC, Seok JH, Lee JK, Jeong J, Kang JS, Kang JK. Subchronic oral toxicity of evodia fruit powder in rats. J Ethnopharmacol 2014; 151:1072-1078. [PMID: 24384379 DOI: 10.1016/j.jep.2013.12.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/23/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Evodia, a fruit from Evodia rutaecarpa, has been used in oriental medicine, and since its various pharmaceutical actions, including anti-cancer activity, have become known, evodia has been widely used as a dietary supplement. However, information regarding its toxicity is limited. MATERIALS AND METHODS Evodia fruit from Evodia rutaecarpa (Juss.) Benth. var. officinalis (Dode) Huang (0, 25, 74, 222, 667, and 2000 mg/kg) was administered orally five times per week for 13 weeks. Clinical signs, body weight, food consumption, hematology, serum chemistry, urinalysis, vaginal cytology, sperm morphology, organ weight, and gross and histopathological findings were evaluated. RESULTS Urinary ketone body excretion was detected in males at 667 and 2000 mg/kg and in females at 2000 mg/kg. An increase in absolute/relative liver weight was observed in both sexes at 2000 mg/kg. Although levels of serum alanine aminotransferase, glucose, total cholesterol, and triglycerides were significantly reduced in males and/or females at 200 and/or 667 and 2000 mg/kg, all values were within normal ranges and were considered non-adverse. In addition, no treatment-related differences in body weight, food consumption, hematology, vaginal cytology, sperm morphology, or gross and histopathological examination were detected. CONCLUSIONS The subchronic no-observable-adverse-effect level for evodia fruit powder following oral administration in rats is greater than 2000 mg/kg.
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Affiliation(s)
- Duyeol Kim
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Yong-Hoon Lee
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Sun Hee Park
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Mi Ju Lee
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Myoung Jun Kim
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Ho-Song Jang
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Jung-Min Lee
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea; Department of Biomedical Laboratory Science, Namseoul University, 21 Maeju-ri, Seonghwan-eup, Cheonan, Chungnam 331-707, Republic of Korea
| | - Hye-Yeong Lee
- Department of Pathology, Biotoxtech Co., Ltd., 686-2 Yangcheong-ri, Ochang-eup, Cheongwon-gun, Chungbuk 363-883, Republic of Korea
| | - Beom Seok Han
- Hoseo Toxicity Research Center, Hoseo University Biomedical Laboratory Science, 79 Hoseo-ro BaeBang-Myeon, Asan, Chungnam 336-795, Republic of Korea
| | - Woo-Chan Son
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, 88 Olympic-ro-43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - Ji Hyeon Seok
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon, Chungbuk 363-700, Republic of Korea
| | - Jong Kwon Lee
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon, Chungbuk 363-700, Republic of Korea
| | - Jayoung Jeong
- Toxicological Research Divison, National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Osong Health Technology Administration Complex, 187 Osongsaengmyeong2-ro, Osong, Cheongwon, Chungbuk 363-700, Republic of Korea
| | - Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, 21 Maeju-ri, Seonghwan-eup, Cheonan, Chungnam 331-707, Republic of Korea.
| | - Jong-Koo Kang
- Department of Laboratory Animal medicine, College of Veterinary medicine, Chungbuk National University, 410 Naesudong-ro, Heungdeok-gu, Cheongju, Chungbuk 361-763, Republic of Korea.
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Kim BH, Cho WS, Han BS. Spontaneous multicentric malignant schwannoma in a male Fischer 344 rat. Toxicol Res 2013; 27:149-52. [PMID: 24278565 PMCID: PMC3834381 DOI: 10.5487/tr.2011.27.3.149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 04/06/2011] [Revised: 05/19/2011] [Accepted: 07/28/2011] [Indexed: 11/25/2022] Open
Abstract
We describe here a multicentric spontaneous malignant schwannoma obtained from one male F344 rat, and this animal was the subject of a carcinogenicity study for which it was treated with diisodecyl phthalate. The animal of the control group not treated with diisodecyl phthalate showed dyspnea and severe lordosis. On the necropsy, two tan, firm, encapsulated masses were observed in the subcutis of the lumbosacral region and the left inguinal region of the abdominal cavity, respectively; the masses were 25 × 17 × 8 mm and 16 × 14 × 8 mm in size, respectively. Histologically, the tumor consisted of spindle and pleomorphic cells that grew in various patterns, that was, sweeping fascicles and herringbone and local organoid patterns. The pleomorphic neoplastic cells had more than two nuclei. Additionally, the diagnosis of malignant schwannoma was confirmed by the immune reactivity of the tumor cells for S-100 protein.
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Affiliation(s)
- Bang Hyun Kim
- Korea Food and Drug Administration, Chungcheongbuk-do 363-951, Korea
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Kang JS, Park KD, Ahn B, Han BS. Decreased Diethylnitrosamine-induced Liver Preneoplastic Lesions by Estradiol-3-benzoate Treatment. Toxicol Res 2013; 27:247-51. [PMID: 24278579 PMCID: PMC3834389 DOI: 10.5487/tr.2011.27.4.247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 10/02/2011] [Revised: 10/12/2011] [Accepted: 10/21/2011] [Indexed: 11/22/2022] Open
Abstract
To clarify whether inhibitory effect of estrogen on liver tumor is associated with cell proliferation, we investigated its role in diethylnitrosamine (DEN)-induced rat preneoplastic lesions, with time sequenced manners. F344 male rats (n = 90) were divided into three groups at 5 weeks of age. The mini-osmotic pumps providing a continuous infusion of DEN was implanted into the abdominal cavity of each animal in group 1, 2 and 3 at 6 weeks of age. To see the effect of estrogen, pellet containing 1 or 10 μg of estradiol- 3-benzoate (EB) was implanted subcutaneously in the animals of groups 2 or 3, respectively, one week prior to DEN treatment. Ten animals of each group were euthanized at 10, 14 and 18 weeks after DEN treatment. Liver tissues at each time point were fixed in 10% phosphate-buffered formalin and were processed and embedded in paraffin and 5 μm sections mounted on a silanized slide. Glutathione S-transferase placental form (GST-P) positive foci and 5-bromo-2-deoxyuridine (BrdU) labeling cells were detected at each time point. Area of GST-P positive foci in DEN+EB 1 or 10 μg group was significantly decreased compared to DEN alone at 14 weeks (p < 0.01 or p < 0.05, respectively) an at 18 weeks (p < 0.05 or p < 0.01, respectively). BrdU index in DEN+EB 1 or 10 μg groups was significantly decreased compared to DEN alone at 14 weeks and at 18 weeks (p < 0.01). Taken together, we conclude that EB treatment decrease the DEN-induced liver preneoplastic lesions and this may be associated with decrease of cellular proliferation.
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Affiliation(s)
- Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan 330-707, Korea
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Kang JS, Kim TM, Shim TJ, Salim EI, Han BS, Kim DJ. Modifying effect of diallyl sulfide on colon carcinogenesis in C57BL/6J-ApcMin/⁺ mice. Asian Pac J Cancer Prev 2013; 13:1115-8. [PMID: 22799291 DOI: 10.7314/apjcp.2012.13.4.1115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Diallyl sulfide (DAS), a flavoring compound derived from garlic, is considered to have cancer chemopreventive potential in experimental animals and humans. This study was designated to examine possible chemopreventive effects of DAS on colon carcinogenesis using genetically engineered transgenic ApcMin/⁺ mice, a well-established animal model for familial adenomatous polyposis (FAP) and sporadic colorectal cancer. Male C57BL/6J-ApcMin/⁺ mice were divided into three groups. Animals of group 1 were placed on the basal diet (AIN-76A) as non-treated controls. Animals of groups 2 and 3 were given DAS- containing diets (in doses of 100 and 300 ppm, respectively). All mice were sacrificed at the end of week 10 of the experiment. Histopathological investigation revealed that the incidence of colonic polyps was decreased dose-dependently by 19% (13/16) in group 2 and by 32% (13/20) in group 3 compared to the 100% incidence (10/10) in group 1. The multiplicity of colonic polyps per mouse was also slightly decreased by DAS treatment (1.88 ± 0.35 in group 2 and 1.63 ± 0.36 in group 3) compared to 2.00 ± 0.39 in group 1. On the other hand, there were no significant differences in the numbers of total polyps per mouse in the small intestine between the groups. Taken together, we suggest that DAS may exert promising inhibitory effects on colon carcinogenesis in the transgenic ApcMin/⁺ mice.
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Affiliation(s)
- Jin Seok Kang
- Department of Biomedical Laboratory Science, Namseoul University, Cheonan, Korea
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Sung JH, Ji JH, Park JD, Song MY, Song KS, Ryu HR, Yoon JU, Jeon KS, Jeong J, Han BS, Chung YH, Chang HK, Lee JH, Kim DW, Kelman BJ, Yu IJ. Subchronic inhalation toxicity of gold nanoparticles. Part Fibre Toxicol 2011; 8:16. [PMID: 21569586 PMCID: PMC3126713 DOI: 10.1186/1743-8977-8-16] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [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: 03/03/2010] [Accepted: 05/14/2011] [Indexed: 12/02/2022] Open
Abstract
Background Gold nanoparticles are widely used in consumer products, including cosmetics, food packaging, beverages, toothpaste, automobiles, and lubricants. With this increase in consumer products containing gold nanoparticles, the potential for worker exposure to gold nanoparticles will also increase. Only a few studies have produced data on the in vivo toxicology of gold nanoparticles, meaning that the absorption, distribution, metabolism, and excretion (ADME) of gold nanoparticles remain unclear. Results The toxicity of gold nanoparticles was studied in Sprague Dawley rats by inhalation. Seven-week-old rats, weighing approximately 200 g (males) and 145 g (females), were divided into 4 groups (10 rats in each group): fresh-air control, low-dose (2.36 × 104 particle/cm3, 0.04 μg/m3), middle-dose (2.36 × 105 particle/cm3, 0.38 μg/m3), and high-dose (1.85 × 106 particle/cm3, 20.02 μg/m3). The animals were exposed to gold nanoparticles (average diameter 4-5 nm) for 6 hours/day, 5 days/week, for 90-days in a whole-body inhalation chamber. In addition to mortality and clinical observations, body weight, food consumption, and lung function were recorded weekly. At the end of the study, the rats were subjected to a full necropsy, blood samples were collected for hematology and clinical chemistry tests, and organ weights were measured. Cellular differential counts and cytotoxicity measurements, such as albumin, lactate dehydrogenase (LDH), and total protein were also monitored in a cellular bronchoalveolar lavage (BAL) fluid. Among lung function test measurements, tidal volume and minute volume showed a tendency to decrease comparing control and dose groups during the 90-days of exposure. Although no statistically significant differences were found in cellular differential counts, histopathologic examination showed minimal alveoli, an inflammatory infiltrate with a mixed cell type, and increased macrophages in the high-dose rats. Tissue distribution of gold nanoparticles showed a dose-dependent accumulation of gold in only lungs and kidneys with a gender-related difference in gold nanoparticles content in kidneys. Conclusions Lungs were the only organ in which there were dose-related changes in both male and female rats. Changes observed in lung histopathology and function in high-dose animals indicate that the highest concentration (20 μg/m3) is a LOAEL and the middle concentration (0.38 μg/m3) is a NOAEL for this study.
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Affiliation(s)
- Jae Hyuck Sung
- Toxicity Evaluation Team, Korea Conformity Laboratories, Incheon, Korea
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Cho WS, Han BS, Ahn B, Nam KT, Choi M, Oh SY, Kim SH, Jeong J, Jang DD. Corrigendum to “Peroxisome proliferator di-isodecyl phthalate has no carcinogenic potential in Fischer 344 rats” [Toxicol. Lett. 178 (2008) 110–116]. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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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Jeong J, Han BS, Cho WS, Choi M, Ha CS, Lee BS, Kim YB, Son WC, Kim CY. Carcinogenicity study of 3-monochloropropane-1, 2-diol (3-MCPD) administered by drinking water to B6C3F1 mice showed no carcinogenic potential. Arch Toxicol 2010; 84:719-29. [DOI: 10.1007/s00204-010-0552-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 04/22/2010] [Indexed: 10/19/2022]
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Hong SK, Sohn KH, Kim IY, Lee JK, Ju JH, Kim JH, Lim CH, Han BS, Jung HC, Lee JY, Park KL. Polybrominated Diphenyl Ethers Orally Administration to Mice Were Tansferred to Offspring during Gestation and Lactation with Disruptions on the Immune System. Immune Netw 2010; 10:64-74. [PMID: 20532126 PMCID: PMC2881425 DOI: 10.4110/in.2010.10.2.64] [Citation(s) in RCA: 7] [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: 02/05/2010] [Revised: 02/22/2010] [Accepted: 04/13/2010] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND The present study was undertaken to examine the immunological effects of pentabrominated diphenyl ether (penta-BDE) and decabrominated diphenyl ether (deca-BDE) on the immune system of the dams and the developmental immune system of the offsprings. METHODS In this study, mated female C57BL/6J mice were orally administered penta-BDE, deca-BDE or corn oil for 5 weeks, from gestational day 6 to lactational day 21. RESULTS The body weight of PND21 exposed to penta-BDE was significantly decreased relative to control mice, but that of post-natal day 63 (PND63) were recovered. Orally dosed dams with penta-BDE had significantly smaller absolute and relative spleen masses than control mice. Absolute and relative spleen and thymus masses of PND21 exposed to penta-BDE were significantly decreased over control. The exposure of dams and PND21 with penta-BDE reduced the number of splenocytes and thymocytes. As results of hematologic analysis, percentage WBC and percentage neutrophils increased in dams with deca-BDE. Splenic T cell proliferation in dams and PND21 exposed to penta-BDE was increased, and there were no significant difference in splenic B cell proliferation in all treatment groups. As results of flow cytometric analysis of splenocyte, percentage total T cell, Th cell and Tc cell in PND21 exposed to penta-BDE was slightly increased, and percentage macrophage in dams and PND21 exposed to deca-BDE was decreased. The ELISA results of antibody production show no significant difference in all treatment groups relative to controls. CONCLUSION These results imply that PBDEs given to the dam were transferred to the offspring during gestation and lactation, and PBDEs transferred from the dam affect immune system of offspring.
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Affiliation(s)
- Soon Keun Hong
- Immnotoxicity Division, National Institute of Toxicological Research, Korea Food and Drug Administration, Seoul, Korea
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Cho M, Cho WS, Choi M, Kim SJ, Han BS, Kim SH, Kim HO, Sheen YY, Jeong J. The impact of size on tissue distribution and elimination by single intravenous injection of silica nanoparticles. Toxicol Lett 2009; 189:177-83. [DOI: 10.1016/j.toxlet.2009.04.017] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 04/02/2009] [Accepted: 04/20/2009] [Indexed: 10/20/2022]
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Cho WS, Kim S, Han BS, Son WC, Jeong J. Comparison of gene expression profiles in mice liver following intravenous injection of 4 and 100 nm-sized PEG-coated gold nanoparticles. Toxicol Lett 2009; 191:96-102. [PMID: 19695318 DOI: 10.1016/j.toxlet.2009.08.010] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 08/09/2009] [Accepted: 08/11/2009] [Indexed: 11/18/2022]
Abstract
Gold nanoparticles (AuNPs) have been widely used in various biomedical applications for photothermal therapy, imaging and drug delivery. Although AuNPs have been recognized as a biologically safe material, very little is known about their molecular and cellular effects. To evaluate the gene expression profile and mechanism of the molecular level of polyethylene glycol (PEG)-coated AuNPs and the effect of particle size, we applied an expression profiling approach. PEG-coated AuNPs of different particle sizes, 4 and 100 nm, were intravenously administered to BALB/c mice (4.26 mg/kg, body weight). Thirty minutes after injection of AuNPs, the mice were sacrificed and liver tissues were removed. Then, pathological examination and microarray analysis were performed on the liver tissues. Histology of the liver tissues did not indicate any pathological changes in all treatment groups. Only 0.38% (170 genes) and 0.50% (224 genes) of the total genes (45,000 genes) were significantly induced by the treatment of 4 or 100 nm AuNPs, respectively. In addition, the 4 and 100 nm AuNPs treatment groups shared 67.1% and 50.9% of the significantly changed genes, respectively. Commonly expressed genes by a single intravenous injection of 4 or 100 nm AuNPs were categorized as apoptosis, cell cycle, inflammation, and metabolic process. In the specifically expressed genes of 4 or 100 nm AuNPs, although the genes were different each other, 4 and 100 nm AuNPs showed similar gene categories such as cell cycle, response to stress, signal transduction, and metabolic process. Therefore, we can conclude that 4 and 100 nm AuNPs showed similar biological effects on liver tissues of mice.
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Affiliation(s)
- Wan-Seob Cho
- ELEGI/Colt Laboratory, Centre for Inflammation Research, The Queen's Medical Research Institute, The University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
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Yoon YJ, Jung YJ, Han BS, Kang JW. Performance of electron beam irradiation for treatment of groundwater contaminated with acetone. Water Sci Technol 2009; 59:2475-2483. [PMID: 19542654 DOI: 10.2166/wst.2009.234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The purposes of this study were to evaluate the efficiency of acetone removal by electron beam irradiation in groundwater and the effect of various conditions. According to the results, the removal kinetics of acetone were pseudo first-order, and the removal efficiencies were expressed to the (%) removal and G-values. By adding sulfite, it was confirmed that acetone was mainly degraded by the reaction with the hydrated electrons. The presence of nitrate caused the removal of acetone to decrease. But there was no significant effect of alkalinity on the removal of acetone. The effect of the initial pH values (pH 5 to 9) on the acetone removal efficiency was negligible, but the pH value decreases due to the formation of acidic compounds after irradiation. Consequently, the radiation-induced removal reactions of acetone followed the pseudo-first-order kinetic model; in addition to the initial concentration of acetone, nitrate and the absorbed dose were important factors in removing acetone from an aqueous solution using electron beam irradiation. The effects of general pH and alkalinity on the degrading acetone were negligible.
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Affiliation(s)
- Y J Yoon
- Department of Environmental Engineering, Yonsei University, Gangwon-do 220-710, Republic of Korea
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Sung JH, Ji JH, Park JD, Yoon JU, Kim DS, Jeon KS, Song MY, Jeong J, Han BS, Han JH, Chung YH, Chang HK, Lee JH, Cho MH, Kelman BJ, Yu IJ. Subchronic Inhalation Toxicity of Silver Nanoparticles. Toxicol Sci 2008; 108:452-61. [DOI: 10.1093/toxsci/kfn246] [Citation(s) in RCA: 363] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ji JH, Jung JH, Kim SS, Yoon JU, Park JD, Choi BS, Chung YH, Kwon IH, Jeong J, Han BS, Shin JH, Sung JH, Song KS, Yu IJ. Twenty-Eight-Day Inhalation Toxicity Study of Silver Nanoparticles in Sprague-Dawley Rats. Inhal Toxicol 2008; 19:857-71. [PMID: 17687717 DOI: 10.1080/08958370701432108] [Citation(s) in RCA: 255] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The antibacterial effect of silver nanoparticles has resulted in their extensive application in health, electronic, and home products. Thus, the exposed population continues to increase as the applications expand. Although previous studies on silver dust, fumes, and silver compounds have revealed some insights, little is yet known about the toxicity of nano-sized silver particles, where the size and surface area are recognized as important determinants for toxicity. Thus, the inhalation toxicity of silver nanoparticles is of particular concern to ensure the health of workers and consumers. However, the dispersion of inhalable ambient nano-sized particles has been an obstacle in evaluating the effect of the inhalation of nano-sized particles on the respiratory system. Accordingly, the present study used a device that generates silver nanoparticles by evaporation/condensation using a small ceramic heater. As such, the generator was able to distribute the desired concentrations of silver nanoparticles to chambers containing experimental animals. The concentrations and distribution of the nanoparticles with respect to size were also measured directly using a differential mobility analyzer and ultrafine condensation particle counter. Therefore, the inhalation toxicity of silver nanoparticles was tested over a period of 28 days. Eight-week-old rats, weighing about 283 g for the males and 192 g for the females, were divided into 4 groups (10 rats in each group): a fresh-air control, a low-dose group (1.73 x 10(4)/cm3), a middle-dose group (1.27 x 10(5)/cm3), and a high-dose group (1.32 x 10(6) particles/cm3, 61 microg/m3). The animals were exposed to the silver nanoparticles for 6 h/day, 5 days/wk, for a total of 4 wk. The male and female rats did not show any significant changes in body weight relative to the concentration of silver nanoparticles during the 28-day experiment. Plus, there were no significant changes in the hematology and blood biochemical values in either the male or female rats. Therefore, the initial results indicated that exposure to silver nanoparticles at a concentration near the current American Conference of Governmental Industrial Hygienists (ACGIH) silver dust limit (100 microg/m3) did not appear to have any significant health effects.
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Affiliation(s)
- Jun Ho Ji
- Samsung Electronics Co. Ltd., Suwon, Korea
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Sung JH, Ji JH, Yoon JU, Kim DS, Song MY, Jeong J, Han BS, Han JH, Chung YH, Kim J, Kim TS, Chang HK, Lee EJ, Lee JH, Yu IJ. Lung Function Changes in Sprague-Dawley Rats After Prolonged Inhalation Exposure to Silver Nanoparticles. Inhal Toxicol 2008; 20:567-74. [DOI: 10.1080/08958370701874671] [Citation(s) in RCA: 217] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Choi M, Cho WS, Han BS, Cho M, Kim SY, Yi JY, Ahn B, Kim SH, Jeong J. Transient pulmonary fibrogenic effect induced by intratracheal instillation of ultrafine amorphous silica in A/J mice. Toxicol Lett 2008; 182:97-101. [PMID: 18835341 DOI: 10.1016/j.toxlet.2008.08.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 07/16/2008] [Accepted: 08/30/2008] [Indexed: 10/21/2022]
Abstract
In order to evaluate the degree of pulmonary fibrosis and to identify the fibrogenic mechanisms induced by ultrafine amorphous silica (UFAS), UFAS suspensions ( approximately 50microl) were instilled intratracheally into A/J mice at doses of 0, 2, 10 and 50mg/kg (n=5 per group). Mice were sacrificed at 24h, 1, 4 and 14 weeks after exposure. Gomori's trichrome staining revealed that UFAS induced severe alveolar epithelial thickening and pulmonary fibrosis at 1 week, though animals almost recovered at 4 and 14 weeks. The mRNA and protein levels of cytokines (IL-4, IL-10, IL-13 and IFN-gamma), matrix metalloproteinases (MMP-2, MMP-9 and MMP-10) and tissue inhibitor of matrix metalloproteinase-1 (TIMP-1) in lung tissues were significantly elevated at 24h and 1week post-treatment, though these levels decreased to near the control range at 4 and 14 weeks except IFN-gamma and MMP-2. These results demonstrate that UFAS can induce pulmonary fibrosis in the same way as crystalline silica. However, the degree of fibrosis observed was transient. This study shows that cytokines (IL-4, IL-10, IL-13 and IFN-gamma), MMPs (MMP-2, MMP-9 and MMP-10) and TIMP-1 play important roles in the fibrosis induced by the intratracheal instillation of UFAS.
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Affiliation(s)
- Mina Choi
- Department of Toxicological Research, Korea Food and Drug Administration, National Institute of Toxicological Research, Seoul 122-704, Republic of Korea
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Cho WS, Han BS, Nam KT, Park K, Choi M, Kim SH, Jeong J, Jang DD. Carcinogenicity study of 3-monochloropropane-1,2-diol in Sprague–Dawley rats. Food Chem Toxicol 2008; 46:3172-7. [DOI: 10.1016/j.fct.2008.07.003] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Revised: 07/10/2008] [Accepted: 07/11/2008] [Indexed: 10/21/2022]
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Kim YS, Kim JS, Cho HS, Rha DS, Kim JM, Park JD, Choi BS, Lim R, Chang HK, Chung YH, Kwon IH, Jeong J, Han BS, Yu IJ. Twenty-eight-day oral toxicity, genotoxicity, and gender-related tissue distribution of silver nanoparticles in Sprague-Dawley rats. Inhal Toxicol 2008; 20:575-83. [PMID: 18444010 DOI: 10.1080/08958370701874663] [Citation(s) in RCA: 522] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The antibacterial effect of silver nanoparticles has resulted in their extensive application in health, electronic, and home products. However, while the population exposed to silver nanoparticles continues to increase with ever new applications, silver nanoparticles remain a controversial research area as regards their toxicity to biological systems. In particular, the oral toxicity of silver nanoparticles is of particular concern to ensure public and consumer health. Accordingly, this study tested the oral toxicity of silver nanoparticles (60 nm) over a period of 28 days in Sprague-Dawley rats following Organization for Economic Cooperation and Development (OECD) test guideline 407 with Good Laboratory Practice (GLP) application. Eight-week-old rats, weighing about 283 g for the males and 192 g for the females, were divided into four 4 groups (10 rats in each group): vehicle control, low-dose group (30 mg/kg), middle-dose group (300 mg/kg), and high-dose group (1000 mg/kg). After 28 days of exposure, the blood biochemistry and hematology were investigated, along with a histopathological examination and silver distribution study. The male and female rats did not show any significant changes in body weight relative to the doses of silver nanoparticles during the 28-day experiment. However, some significant dose-dependent changes were found in the alkaline phsophatase and cholesterol values in either the male or female rats, seeming to indicate that exposure to over more than 300 mg of silver nanoparticles may result in slight liver damage. There were no statistically significant differences in the micronucleated polychromatic erythrocytes (MN PCEs) or ratio of polychromatic erythrocytes among the total erythrocytes after silver nanoparticle exposure when compared with the control. Therefore, the present results suggest that silver nanoparticles do not induce genetic toxicity in male and female rat bone marrow in vivo. Nonetheless, the tissue distribution of silver nanopaticles did show a dose-dependent accumulation of silver content in all the tissues examined. In particular, a gender-related difference in the accumulation of silver was noted in the kidneys, with a twofold increase in the female kidneys when compared with the male kidneys.
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Affiliation(s)
- Yong Soon Kim
- Korea Environment & Merchandise Testing Institute, Incheon, Korea
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Cho WS, Han BS, Lee H, Kim C, Nam KT, Park K, Choi M, Kim SJ, Kim SH, Jeong J, Jang DD. Subchronic toxicity study of 3-monochloropropane-1,2-diol administered by drinking water to B6C3F1 mice. Food Chem Toxicol 2008; 46:1666-73. [DOI: 10.1016/j.fct.2007.12.030] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 11/15/2007] [Accepted: 12/30/2007] [Indexed: 11/29/2022]
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Cho WS, Han BS, Ahn B, Nam KT, Choi M, Oh SY, Kim SH, Jeong J, Jang DD. Peroxisome proliferator di-isodecyl phthalate has no carcinogenic potential in Fischer 344 rats. Toxicol Lett 2008; 178:110-6. [PMID: 18407439 DOI: 10.1016/j.toxlet.2008.02.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Revised: 02/28/2008] [Accepted: 02/28/2008] [Indexed: 11/17/2022]
Abstract
Di-isodecyl phthalate (DIDP), a peroxisome proliferator-activated receptor-alpha activator, is widely used as a plasticizer in the manufacture of polyvinyl chloride (PVC), and ultimately in typical vinyl applications, particularly wire, cable and toys, etc. To examine its carcinogenic potential, DIDP was fed to Fischer 344 rats in the diet at doses of 0, 400, 2000 and 8000 ppm for 2 years. Briefly, significant decreases in the overall survival and body weights, and increases in the relative weights of kidneys and liver were noted in both sexes of the highest dose groups. However, no treatment-related neoplastic lesions were observed in the internal organs, including the liver. Unlike di(2-ethylhexyl) phthalate (DEHP), DIDP failed to maintain the catalase-inducing potential between early and late expressions of catalase protein from western blotting, immunohistochemistry and enzyme activity measurements. These results suggest that the non-carcinogenicity of DIDP in F344 rats was due to its limited potential for peroxisomal proliferating activity.
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Affiliation(s)
- Wan-Seob Cho
- National Institute of Toxicological Research, Korea Food and Drug Administration, Seoul 122-704, Republic of Korea
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Abstract
BACKGROUND AND PURPOSE The traditional paradigm has regarded essential tremor (ET) as a benign disorder. However, recent clinical, neuroimaging, and neuropathologic studies suggest that ET may be a progressive neurologic disorder. Based on clinicopathologic findings that cerebellum and its outflow are the key structures in ET and degeneration of gray matter in cerebellum is followed by consequent wallerian degeneration of white matter (WM) fibers, the aim of the present study was to investigate changes in anisotropy in patients with ET. MATERIALS AND METHODS Fractional anisotropy (FA) images were generated from DTI data acquired at 1.5T in 10 patients with ET compared with 8 control subjects by using statistical parametric mapping to make voxel-by-voxel comparisons. RESULTS Compared with the control subjects, the patients with ET exhibited significantly reduced FA (P(uncorrected) < .005) in the anterolateral portion of the right pons and decreased FA in the bilateral cerebellum, left retrorubral area of the midbrain, and bilateral deep WM, including the orbitofrontal, lateral frontal, parietal, and temporal WM. CONCLUSION This study demonstrates that structural changes in the WM are extensive in patients with ET, supporting the findings of previous functional neuroimaging and pathologic studies.
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Affiliation(s)
- D H Shin
- Department of Neurology, Ajou University College of Medicine, Suwon, South Korea
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Han BS, Uhm YR, Kim GM, Rhee CK. Novel synthesis of nanorod ZnO and Fe-doped ZnO by the hydrolysis of metal powders. J Nanosci Nanotechnol 2007; 7:4158-4160. [PMID: 18047141] [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: 05/25/2023]
Abstract
Fe-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn and Fe nano-powders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60 degrees C for 24 h to obtain the precipitates from the hydrolysis of Zn and Fe. X-ray diffraction patterns for all the samples showed a pure wurtzite single phase, without any segregation of the Fe into the particulates within the instrumental resolution limit. The TEM results for ZnO with and without an Fe-doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing Fe content, the UV-vis spectra were shifted to a long wave length and this result indicates that the band gap was changed by an Fe-doping.
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Affiliation(s)
- B S Han
- Nuclear Nanomaterials Development Lab, Korea Atomic Energy Reseach Institute(KAERI), Daejeon 305-600, Korea
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Yin L, Chen CQ, Peng CH, Chen GM, Zhou HJ, Han BS, Li HW. Primary small-bowel non-Hodgkin's lymphoma: a study of clinical features, pathology, management and prognosis. J Int Med Res 2007; 35:406-15. [PMID: 17593870 DOI: 10.1177/147323000703500316] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The records of 34 patients diagnosed with primary small bowel non-Hodgkin's lymphoma during a 10-year period between January 1996 and December 2005, including 27 cases for which complete follow-up records were available, were studied. Abdominal pain (70.6% of patients) was the main presenting symptom, followed by intestinal obstruction (38.2%). The most common primary site was the ileum (58.8%), followed by the jejunum (26.5%) and duodenum (17.6%); one case had tumours at two sites in the small bowel. Twenty-seven patients had small bowel B-cell lymphoma (24 diffuse large B-cell lymphoma; three mucosa-associated lymphoid tissue B-cell lymphoma) and seven patients had small bowel T-cell lymphoma. Cumulative survival in patients with small bowel B-cell lymphoma was higher than that in patients with small bowel T-cell lymphoma. Data on 16 male and eight female patients with diffuse large B-cell lymphoma showed that 62.5% of these patients presented with disease stages I or II and 37.5% with stages III or IV. Cumulative survival in patients at stages IE or IIE was significantly higher than that of patients at stages IIIE or IVE. Four of five patients who died from diffuse large B-cell lymphoma had abnormal levels of lactate dehydrogenase and serum albumin.
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Affiliation(s)
- L Yin
- Department of General Surgery, Ruijin Hospital of Shanghai, Shanghai Jiaotong University, Shanghai, People's Republic of China.
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Wang G, Zhao DQ, Bai HY, Pan MX, Xia AL, Han BS, Xi XK, Wu Y, Wang WH. Nanoscale periodic morphologies on the fracture surface of brittle metallic glasses. Phys Rev Lett 2007; 98:235501. [PMID: 17677915 DOI: 10.1103/physrevlett.98.235501] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2006] [Indexed: 05/16/2023]
Abstract
Out-of-plane, nanoscale periodic corrugations are observed in the dynamic fracture surface of brittle bulk metallic glasses with fracture toughness approaching that of silica glasses. A model based on the meniscus instability and plastic zone theory is used to explain such dynamic crack instability. The results indicate that the local softening mechanism in the fracture is an essential ingredient for controlling the formation of the unique corrugations, and might provide a new insight into the origin of fracture surface roughening in brittle materials.
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Affiliation(s)
- G Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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Kang JS, Ahn B, Kim CK, Han BS, Che JH, Kim S, Jang DD, Yang KH. Suppression of chemically-induced liver tumors by castration or estradiol-3-benzoate treatment in F344 rats. Oncol Rep 2005; 14:377-82. [PMID: 16012718] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
Epidemiological data reveal that the incidence of liver cancer is markedly higher in men than women. To clarify the mechanism responsible for the induction of higher incidence of liver tumors in male animals, we investigated the modifying effect of sex hormones in diethylnitrosamine (DEN)-induced rat hepatocarcinogenesis. F344 male rats (n=120) were divided into two experiments, experiment I (Exp I) and experiment II (Exp II). In each experiment, 60 rats were randomly allocated into four groups. The mini-osmotic pumps containing doses of 47.5 mg (Exp I) or 23.75 mg (Exp II) of DEN were inserted into the abdominal cavity of each animal to initiate liver carcinogenesis. Animals in group 2 were castrated one week prior to DEN treatment, and animals in groups 3 and 4 were treated with 1 or 10 microg of estradiol-3-benzoate (EB), respectively, one week prior to DEN treatment. Animals in group 1 were treated with DEN alone and sham-operated at the same time. All animals were sacrificed 26 weeks after DEN treatment. In Exp I, liver tumor incidence of group 3 decreased significantly compared with that of group 1 (p<0.05), and tumor multiplicities of groups 2, 3 and 4 were decreased significantly compared to that of group 1 (p<0.01). In Exp II, tumor incidence of group 3 was significantly different (p<0.05) when compared to that of group 1. Immunohistochemical expression of ERalpha was shown in normal appearing cells, but not in tumor cells. Western blot analysis confirmed that ERalpha expression was higher in normal liver tissue compared to tumor tissues. Taken together, we conclude that castration or EB treatment has an inhibitory effect in DEN-induced hepatocarcinogenesis in F344 rats. The reason for ERalpha loss in tumor cells should be further elucidated.
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Affiliation(s)
- Jin Seok Kang
- National Institute of Toxicological Research, Korea Food and Drug Administration, Nokbun-dong, Eunpyung-ku, Seoul 122-704, Korea
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Fukamachi K, Han BS, Kim CK, Takasuka N, Matsuoka Y, Matsuda E, Yamasaki T, Tsuda H. Possible enhancing effects of atrazine and nonylphenol on 7,12-dimethylbenz[a]anthracene-induced mammary tumor development in human c-Ha-ras proto-oncogene transgenic rats. Cancer Sci 2004; 95:404-10. [PMID: 15132767 DOI: 10.1111/j.1349-7006.2004.tb03223.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Our transgenic (Tg) strain carrying copies of the human c-Ha-ras proto-oncogene is highly susceptible to 7,12-dimethylbenz[a]anthracene (DMBA)-induced mammary carcinogenesis, possibly due to activation of the transgene, and can be used in medium-term bioassay models to test for modifying effects of estrogenic environmental compounds on tumor development. The present study was conducted to assess the influence of dietary feeding of the endocrine disruptors atrazine and nonylphenol on DMBA-induced carcinogenesis in c-Ha-ras Tg rats. Animals of both sexes were given a single oral dose of DMBA (25 mg/kg body weight) at 50 days of age and thereafter received soybean-free diet containing 5, 50 or 500 ppm atrazine, or 10, 25, 100 or 250 ppm nonylphenol. In female Tg rats, atrazine at a dose of 5 ppm increased the incidences of mammary adenomas and adenocarcinomas (P < 0.01 and P < 0.05), while 50 ppm increased the adenocarcinoma incidence (P < 0.05). In males, skin tumor development, in contrast, was significantly decreased at the highest dose. Nonylphenol at 10 ppm increased adenocarcinoma and total mammary tumor multiplicity in female Tg rats (P < 0.05), but there was no dose dependence, a significant quadratic dose-response trend rather being observed (P < 0.05). In vitro, atrazine did not cause proliferation of MCF-7 cells at any of a range of doses tested. These results suggest that endocrine disruptors may enhance mammary carcinogenesis, but only in a certain limited dose range under the present experimental conditions. The doses applied, moreover, were all extremely high compared to the possible environmental human exposure levels.
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Affiliation(s)
- Katsumi Fukamachi
- Experimental Pathology and Chemotherapy Division, National Cancer Center Research Institute, Chuo-ku, Tokyo 104-0045, Japan
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Park CB, Fukamachi K, Takasuka N, Han BS, Kim CK, Hamaguchi T, Fujita KI, Ueda S, Tsuda H. Rapid induction of skin and mammary tumors in human c-Ha-ras proto-oncogene transgenic rats by treatment with 7,12-dimethylbenz[a]anthracene followed by 12-O-tetradecanoylphorbol 13-acetate. Cancer Sci 2004; 95:205-10. [PMID: 15016318 DOI: 10.1111/j.1349-7006.2004.tb02204.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
We have established a transgenic rat line carrying 3 copies of the human c-Ha-ras proto-oncogene with its own promoter region (Jcl/SD-TgN(HrasGen)128Ncc) (Hras128 rat), expression being detectable in almost all organs. We have already demonstrated that the rat is highly sensitive to mammary, esophagus and bladder carcinogenesis. In the present study, male and female transgenic and wild-type littermates were topically treated with 2.5 mg of 7,12-dimethylbenz[a]anthracene (DMBA) dissolved in 1.0 ml of acetone on the back skin at 50 days after birth. Starting 1 week thereafter, they were again topically treated with 100 nmol of 12-O-tetradecanoylphorbol 13-acetate (TPA) dissolved in 0.5 ml of acetone 3 times weekly for the following 31 weeks. In males treated with DMBA and/or TPA, skin tumors, including both squamous cell papillomas (SCP) and carcinomas (SCC), were preferentially induced at the DMBA-TPA painting sites: DMBA-TPA, 15/15 (100%); DMBA, 6/8 (75%); TPA, 1/6 (16.7%). They were also, unexpectedly, induced on remote scrotal skin: DMBA-TPA, 13/15 (86.7%); DMBA, 5/8 (62.5%); TPA, 0/6 (0%). Lesions were thus more frequent in the DMBA-TPA group than with DMBA or TPA alone. In females, adenomas and adenocarcinomas of the mammary glands were preferentially induced: DMBA-TPA, 12/14 (85.7%); DMBA, 6/8 (75%); TPA, 3/6 (50%), with only a few small skin papillomas at painting sites. Incidences and numbers of the mammary and skin tumors were much greater in Hras128 rats than in their wild-type counterparts. PCR-RFLP analysis of the transgene indicated that the percentage of the cell populations harboring a mutation in codons 12 and/or 61 ranged from 2% to 60% in individual tumors; skin tumors showed more mutations in codon 61 in the DMBA-treated groups. In contrast, no mutations were detected in the endogenous rat c-Ha-ras gene. These results indicate that the Hras128 rat is highly susceptible to DMBA-TPA skin and mammary carcinogenesis, thus providing a unique painting model for skin as well as mammary gland carcinogenesis, that would be suitable for investigating the role of transgene mutations.
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Affiliation(s)
- Cheol Beom Park
- Experimental Pathology and Chemotherapy Division, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
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Kim K, Kim CO, Huh Y, Ahn B, Han BS, Choi KS. Comparison between 2-day and 10-day MPTP treatment modalities in the mouse model of Parkinson's disease. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/nrc.10055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Han BS, Fukamachi K, Takasuka N, Ohnishi T, Maeda M, Yamasaki T, Tsuda H. Inhibitory effects of 17beta-estradiol and 4-n-octylphenol on 7,12-dimethylbenz[a]anthracene-induced mammary tumor development in human c-Ha-ras proto-oncogene transgenic rats. Carcinogenesis 2002; 23:1209-15. [PMID: 12117780 DOI: 10.1093/carcin/23.7.1209] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Experiments were conducted to determine whether the natural estrogen and an environmental compound with estrogenic action, 4-n-octylphenol (4nOP), could modify tumor development in human c-Ha-ras proto-oncogene transgenic (Tg) rats which are highly susceptible to mammary and skin carcinogens. Female and male Tg and non-transgenic (non-Tg) rats were given a single oral dose of 7,12-dimethylbenz[a]anthracene (DMBA) (25 mg/kg body weight) at 50 days of age and thereafter subcutaneously implanted with cholesterol pellets containing 0.01, 0.1 or 1.0 mg beta-estradiol 3-benzoate (E2) per rat or received diets containing 1000 or 100 p.p.m. 4nOP for 12 weeks in females or for 20 weeks in males. E2 reduced the mammary tumor incidence and multiplicity in a dose dependent manner, especially in female Tg rats. In contrast, E2 increased mammary tumor incidence and multiplicity at the lowest dose (0.01 mg), however it reduced skin tumor induction in male Tg rats. 4nOP at a dose of 100 p.p.m. decreased mammary tumor multiplicity in female Tg rats (P < 0.001). No effects were observed in males. In separate in vitro studies, E2 at low doses (10(-11)-10(-8) M) enhanced the growth of both MCF-7 and T47D cells and this was similarly the case for 4nOP at high doses (10(-7)-10(-5) M) in T47D cells. The finding that E2 and 4nOP at high doses caused reduction in mammary tumor development in female Tg and possibly non-Tg rats, may indicate that excess estrogen can exert a paradoxical inhibitory influence. E2 also appears to have bipotential effects in males, promoting mammary, but inhibiting skin carcinogenesis. These contrasting observations may be caused by differences in background physiological estrogen levels. In addition, the results suggest that Tg rats can be used in medium-term bioassay models to test for the modifying effects of estrogenic environmental compounds on mammary tumor development.
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MESH Headings
- 9,10-Dimethyl-1,2-benzanthracene/toxicity
- Animals
- Animals, Genetically Modified
- Carcinogens/toxicity
- Cell Division/drug effects
- Cell Transformation, Neoplastic
- Dose-Response Relationship, Drug
- Estradiol/therapeutic use
- Female
- Gene Transfer Techniques
- Genes, ras/genetics
- Genetic Predisposition to Disease
- Humans
- Mammary Neoplasms, Experimental/chemically induced
- Mammary Neoplasms, Experimental/drug therapy
- Mammary Neoplasms, Experimental/genetics
- Methylnitrosourea/toxicity
- Phenols/therapeutic use
- Proto-Oncogene Mas
- Rats
- Tumor Cells, Cultured/drug effects
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Affiliation(s)
- Beom Seok Han
- Experimental Pathology and Chemotherapy Division, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
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Kim JE, Han BS, Choi WS, Eom DS, Lee EH, Oh TH, Markelonis GJ, Saido TC, Lee GE, Chung IK, Oh YJ. Temporospatial sequence of cellular events associated with etoposide-induced neuronal cell death: role of antiapoptotic protein Bcl-X(L). J Neurosci Res 2001; 66:1074-82. [PMID: 11746439 DOI: 10.1002/jnr.10028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Etoposide-induced death comprises such nuclear events as the formation of topoisomerase II-DNA cleavable complex and cytosolic events including caspase activation. By first establishing the temporospatial death sequence triggered by etoposide in a neuronal cell line, MN9D overexpressing Bcl-X(L) (MN9D/Bcl-X(L)) or control vector (MN9D/Neo), we examined whether formation of this complex is primarily responsible for cell death and at which strategic points and how Bcl-X(L) blocks etoposide-induced neuronal death. Etoposide induced death that was dependent on caspase, cycloheximide, and calpain in MN9D/Neo cells. Etoposide also induced death in enucleated MN9D/Neo cells, although this was less severe. The level of topoisomerase II-DNA cleavable complex reached at a maximum of 2 hr after etoposide treatment was identical in MN9D/Neo and MN9D/Bcl-X(L) cells. In MN9D/Neo cells, cytochrome c release into the cytosol and caspase activation occurred as early as 2 hr and 3-6 hr after etoposide treatment, respectively. Etoposide-induced DNA laddering potentially via caspase appeared as early as 12 hr after drug treatment, followed by nuclear swelling in MN9D/Neo cells (>18-20 hr). Subsequently, nuclear condensation started by 24-28 hr and became apparent thereafter. All of these events except for nuclear swelling were substantially blocked in MN9D/Bcl-X(L). At the later stage of cell death (<32-36 hr), a specific cleavage of Bax and fodrin appeared that was completely blocked by calpain inhibitor or by Bcl-X(L). Taken together, our data suggest that Bcl-X(L) prevents etoposide-induced neuronal death by exerting its anticaspase and anticalpain effect on cellular events after the formation of topoisomerase II-DNA cleavable complex that may not be a major contributor to cell death.
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Affiliation(s)
- J E Kim
- Department of Biology, Yonsei University College of Science, 134 Shinchondong Seodaemoonku, Seoul 120-749, Korea
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Jang SH, Byun WM, Chang Y, Han BS, Ahn SH. Combined functional magnetic resonance imaging and transcranial magnetic stimulation evidence of ipsilateral motor pathway with congenital brain disorder: a case report. Arch Phys Med Rehabil 2001; 82:1733-6. [PMID: 11733891 DOI: 10.1053/apmr.2001.25101] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We present the case of 28-year-old man with schizencephaly who had mild left hemiparesis with mirror movement. Brain mapping using functional magnetic resonance imaging (fMRI) and transcranial magnetic stimulation (TMS) for both hand muscles was done to evaluate his neurologic state. Motor evoked potential (MEP) from both abductor pollicis brevis (APB) muscles was obtained simultaneously. fMRI showed that the left primary sensorimotor cortex became active when the right fingers performed the flexion-extension exercise. The left primary sensorimotor cortex, left prefrontal area, and both supplementary motor areas were activated with flexion-extension exercise of the left hand. Brain mapping for both APB muscles using TMS showed that no MEP was evoked in the right hemisphere, but a APB total of 5 sites were evoked in the left hemisphere simultaneously. The optimal scalp site for both APB muscles was present at the same site. The MEPs of both muscles which were evoked by stimulation of the optimal scalp site, showed similar latencies, amplitudes, and figures of potential. The similarities in both MEPs and the same optimal scalp site support the assumption that MEPs of both APB muscles are produced by the corticospinal tract originating from the same motor cortex. Our results showed that the ipsilateral motor pathway extended from the unaffected left hemisphere to both hand muscles. This finding may reflect functional reorganization of motor area in a patient with congenital brain disorder.
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Affiliation(s)
- S H Jang
- Department of Physical Medicine and Rehabilitation, University of Yeungnam School of Medicine, Taegu, South Korea
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