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Kim D, Heo Y, Kim M, Suminda GGD, Manzoor U, Min Y, Kim M, Yang J, Park Y, Zhao Y, Ghosh M, Son YO. Inhibitory effects of Acanthopanax sessiliflorus Harms extract on the etiology of rheumatoid arthritis in a collagen-induced arthritis mouse model. Arthritis Res Ther 2024; 26:11. [PMID: 38167214 PMCID: PMC10763440 DOI: 10.1186/s13075-023-03241-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 12/15/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND The biological function of Acanthopanax sessiliflorus Harm (ASH) has been investigated on various diseases; however, the effects of ASH on arthritis have not been investigated so far. This study investigates the effects of ASH on rheumatoid arthritis (RA). METHODS Supercritical carbon dioxide (CO2) was used for ASH extract preparation, and its primary components, pimaric and kaurenoic acids, were identified using gas chromatography-mass spectrometer (GC-MS). Collagenase-induced arthritis (CIA) was used as the RA model, and primary cultures of articular chondrocytes were used to examine the inhibitory effects of ASH extract on arthritis in three synovial joints: ankle, sole, and knee. RESULTS Pimaric and kaurenoic acids attenuated pro-inflammatory cytokine-mediated increase in the catabolic factors and retrieved pro-inflammatory cytokine-mediated decrease in related anabolic factors in vitro; however, they did not affect pro-inflammatory cytokine (IL-1β, TNF-α, and IL-6)-mediated cytotoxicity. ASH effectively inhibited cartilage degradation in the knee, ankle, and toe in the CIA model and decreased pannus development in the knee. Immunohistochemistry demonstrated that ASH mostly inhibited the IL-6-mediated matrix metalloproteinase. Gene Ontology and pathway studies bridge major gaps in the literature and provide insights into the pathophysiology and in-depth mechanisms of RA-like joint degeneration. CONCLUSIONS To the best of our knowledge, this is the first study to conduct extensive research on the efficacy of ASH extract in inhibiting the pathogenesis of RA. However, additional animal models and clinical studies are required to validate this hypothesis.
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Affiliation(s)
- Dahye Kim
- Division of Animal Genetics and Bioinformatics, National Institute of Animal Science, RDA, Wanju, Republic of Korea
| | - Yunji Heo
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Mangeun Kim
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Godagama Gamaarachchige Dinesh Suminda
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Umar Manzoor
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
- Laboratory of Immune and Inflammatory Disease, College of Pharmacy, Jeju Research Institute of Pharmaceutical Sciences, Jeju National University, Jeju, 63243, Republic of Korea
| | - Yunhui Min
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Minhye Kim
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Jiwon Yang
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
| | - Youngjun Park
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea
- Laboratory of Immune and Inflammatory Disease, College of Pharmacy, Jeju Research Institute of Pharmaceutical Sciences, Jeju National University, Jeju, 63243, Republic of Korea
| | - Yaping Zhao
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Mrinmoy Ghosh
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea.
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering (SBCE), Kalasalingam Academy of Research and Education, Krishnankoil, Srivilliputhur, 626126, India.
| | - Young-Ok Son
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea.
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju City, Jeju Special Self-Governing Province, 63243, Republic of Korea.
- Practical Translational Research Center, Jeju National University, Jeju, 63243, Republic of Korea.
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Min Y, Heo Y, Feng F, Kim D, Kim M, Yang J, Kim HJ, Jee Y, Ghosh M, Kang I, Son YO. High-Sucrose Diet Accelerates Arthritis Progression in a Collagen-Induced Rheumatoid Arthritis Model. Mol Nutr Food Res 2023; 67:e2300244. [PMID: 37688304 DOI: 10.1002/mnfr.202300244] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/15/2023] [Indexed: 09/10/2023]
Abstract
SCOPE High dietary sugar and sweeteners are suspected to cause the development of rheumatoid arthritis (RA) symptoms through the induction of proinflammatory cytokine release. However, the mechanisms by which increased dietary sugar affects RA etiology are not yet fully understood. The study uses a mouse model of collagen-induced RA (CIA) to investigate the relationship between excessive sugar consumption and RA risk. METHODS AND RESULTS RA-associated pathological features are assessed in the nonimmunized (NI) control group, the CIA-positive control group, and the CIA + high-sucrose diet (CIA+HS, 63% calories from sucrose) group. Compared with the CIA group, the CIA+HS group shows a greater increase in paw thickness and clinical scores, as well as, a higher degree of pannus formation and inflammation in the knee, ankle, and sole tissues. Moreover, the infiltration of immune cells is increased in the CIA+HS group. Although the expression of hepatic lipogenic genes, is not altered, that of toll-like receptor (TLR4) and IL-1β is considerably elevated in the CIA+HS group. CONCLUSIONS These findings suggest that excessive sucrose consumption causes hepatic fibrosis and inflammation, contributing to the pathophysiology of RA.
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Affiliation(s)
- Yunhui Min
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Yunji Heo
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Fang Feng
- Department of Food Science and Nutrition, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Dahye Kim
- Division of Animal Genetics and Bioinformatics, The National Institute of Animal Science, RDA, Wanju, 55465, Republic of Korea
| | - Mangeun Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Jiwon Yang
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Hyo Jin Kim
- Department of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Youngheun Jee
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
- Department of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Mrinmoy Ghosh
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering (SBCE), Kalasalingam Academy of Research and Educational, Krishnankoil, 626126, India
| | - Inhae Kang
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
- Department of Food Science and Nutrition, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
| | - Young-Ok Son
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Jeju, 63243, Republic of Korea
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Min Y, Suminda GGD, Heo Y, Kim M, Ghosh M, Son YO. Metal-Based Nanoparticles and Their Relevant Consequences on Cytotoxicity Cascade and Induced Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12030703. [PMID: 36978951 PMCID: PMC10044810 DOI: 10.3390/antiox12030703] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/06/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
Emerging nanoscience allows us to take advantage of the improved evolutionary components and apply today’s advanced characterization and fabrication techniques to solve environmental and biological problems. Despite the promise that nanotechnology will improve our lives, the potential risks of technology remain largely uncertain. The lack of information on bio-impacts and the absence of consistent standards are the limitations of using metal-based nanoparticles (mNPs) for existing applications. To analyze the role played by the mNPs physicochemical characteristics and tactics to protect live beings, the field of nanotoxicology nowadays is focused on collecting and analyzing data from in vitro and in vivo investigations. The degree of reactive oxygen species (ROS) and oxidative stress caused by material nanoparticles (NPs) depends on many factors, such as size, shape, chemical composition, etc. These characteristics enable NPs to enter cells and interact with biological macromolecules and cell organelles, resulting in oxidative damage, an inflammatory response, the development of mitochondrial dysfunction, damage to genetic material, or cytotoxic effects. This report explored the mechanisms and cellular signaling cascades of mNPs-induced oxidative stress and the relevant health consequences.
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Affiliation(s)
- Yunhui Min
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Republic of Korea
| | | | - Yunji Heo
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Republic of Korea
| | - Mangeun Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Republic of Korea
| | - Mrinmoy Ghosh
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Republic of Korea
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering (SBCE), Kalasalingam Academy of Research and Educational, Krishnankoil 626126, India
- Correspondence: (M.G.); (Y.-O.S.); Tel.: +82-10-6752-9677 (M.G.); +82-64-754-3331 (Y.-O.S.)
| | - Young-Ok Son
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Republic of Korea
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Republic of Korea
- Bio-Health Materials Core-Facility Center, Jeju National University, Jeju-si 63243, Republic of Korea
- Practical Translational Research Center, Jeju National University, Jeju-si 63243, Republic of Korea
- Correspondence: (M.G.); (Y.-O.S.); Tel.: +82-10-6752-9677 (M.G.); +82-64-754-3331 (Y.-O.S.)
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Min Y, Ahn D, Truong TMT, Kim M, Heo Y, Jee Y, Son YO, Kang I. Excessive sucrose exacerbates high fat diet-induced hepatic inflammation and fibrosis promoting osteoarthritis in mice model. J Nutr Biochem 2023; 112:109223. [PMID: 36410638 DOI: 10.1016/j.jnutbio.2022.109223] [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: 01/11/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/21/2022]
Abstract
Osteoarthritis (OA) is marked by chronic low-grade systemic inflammation and cartilage destruction. High fat diet causes obesity and increases the risk of knee OA-development. However, the impact of high dietary sugar intake on OA pathogenesis has not been elucidated yet. Therefore, we investigated the effects of a high-fat and high-sucrose (HF+HS) diet in experimental OA mouse models. Eight-week-old male C57BL/6J mice were fed a standard chow (n=6), high-fat (HF) (n=5), or HF+HS (n=7) diets for 12 weeks; thereafter, the mice underwent surgical destabilization of the medial meniscus (DMM) and received the same experimental diets for an additional 8 weeks. The pathogenesis of knee OA, obesogenic parameters, and inflammation levels in the liver and adipose tissue were investigated. HF+HS diet induced severe cartilage erosion with osteophyte development and subchondral bone plate thickening, indicating that HF+HS diet exacerbated OA. Despite marginal differences in metabolic parameters, hepatic free cholesterol accumulation increased in mice with DMM-induced OA fed on HF+HS diet than in those fed HF diet. Notably, the levels of inflammatory cytokines and fibrosis markers were greater in the livers of mice with DMM-induced OA, fed on HF+HS diet than those in the control group. However, adipose tissue remodeling was not affected by the HF+HS diet. These findings indicate that excess sucrose intake along with a HF diet triggers hepatic inflammation and fibrosis, thereby, contributing to OA pathogenesis.
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Affiliation(s)
- Yunhui Min
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea
| | - Dohyun Ahn
- Department of Food Science and Nutrition, Jeju National University Jeju Special Self-Governing Province, Republic of Korea
| | - Thi My Tien Truong
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea
| | - Mangeun Kim
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea
| | - Yunji Heo
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea
| | - Youngheun Jee
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea; Department of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea
| | - Young-Ok Son
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea; Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea; Bio-Health Materials Core-Facility Center, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea; Practical Translational Research Center, Jeju National University, Jeju Special Self-Governing Province,, Republic of Korea.
| | - Inhae Kang
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju Special Self-Governing Province, Republic of Korea; Department of Food Science and Nutrition, Jeju National University Jeju Special Self-Governing Province, Republic of Korea.
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Yoon S, Min Y, Park C, Kim D, Heo Y, Kim M, Son E, Ghosh M, Son YO, Hur CG. Innate Immune Response Analysis in Meniscus Xenotransplantation Using Normal and Triple Knockout Jeju Native Pigs. Int J Mol Sci 2022; 23:ijms231810416. [PMID: 36142330 PMCID: PMC9499368 DOI: 10.3390/ijms231810416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 08/31/2022] [Accepted: 09/07/2022] [Indexed: 11/16/2022] Open
Abstract
Although allogenic meniscus grafting can be immunologically safe, it causes immune rejection due to an imbalanced tissue supply between donor and recipient. Pigs are anatomically and physiologically similar to adult humans and are, therefore, considered to be advantageous xenotransplantation models. However, immune rejection caused by genetic difference damages the donor tissue and can sometimes cause sudden death. Immune rejection is caused by genes; porcine GGTA1, CMAH, and B4GLANT2 are the most common. In this study, we evaluated immune cells infiltrating the pig meniscus transplanted subcutaneously into BALB/c mice bred for three weeks. We compared the biocompatibility of normal Jeju native black pig (JNP) meniscus with that of triple knockout (TKO) JNP meniscus (α-gal epitope, N-glycolylneuraminic acid (Neu5Gc), and Sd (a) epitope knockout using CRISPR-Cas 9). Mast cells, eosinophils, neutrophils, and macrophages were found to have infiltrated the transplant boundary in the sham (without transplantation), normal (normal JNP), and test (TKO JNP) samples after immunohistochemical analysis. When compared to normal and sham groups, TKO was lower. Cytokine levels did not differ significantly between normal and test groups. Because chronic rejection can occur after meniscus transplantation associated with immune cell infiltration, we propose studies with multiple genetic editing to prevent immune rejection.
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Affiliation(s)
- Seungwon Yoon
- Cronex Co., Jeju-si 63078, Korea
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Korea
| | - Yunhui Min
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Korea
| | | | - Dahye Kim
- Division of Animal Genetics and Bioinformatics, The National Institute of Animal Science, RDA, Wanju 55465, Korea
| | - Yunji Heo
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Korea
| | - Mangeun Kim
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Korea
| | | | - Mrinmoy Ghosh
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Korea
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering (SBCE), Kalasalingam Academy of Research and Educational, Krishnankoil 626126, India
| | - Young-Ok Son
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Korea
- Department of Animal Biotechnology, Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si 63243, Korea
- Correspondence: (Y.-O.S.); (C.-G.H.); Tel.: +82-64-754-3331 (Y.-O.S.); +82-64-805-0033 (C.-G.H.)
| | - Chang-Gi Hur
- Cronex Co., Jeju-si 63078, Korea
- Interdisciplinary Graduate Program in Advanced Convergence Technology and Science, Jeju National University, Jeju-si 63243, Korea
- Correspondence: (Y.-O.S.); (C.-G.H.); Tel.: +82-64-754-3331 (Y.-O.S.); +82-64-805-0033 (C.-G.H.)
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KC P, Acharya M, Maharjan A, Lee D, Kusma S, Adhikari M, Kim S, Kim S, Kim D, Kim D, Choi Y, Kim C, Kim H, Heo Y. P10-05 No apparent cellular immunotoxicity in mice subchronically exposed to polyethylene or polytetrafluorethylene microplastics through gastric intubation. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Park JW, Heo Y, Cho WS. LP-37 Biokinetics of fluorophore-conjugated microplastics in marine mussels. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Acharya M, Lee D, Maharjan A, Yang S, Seo S, Kang H, Sin J, Lee G, Yu Y, Park J, Lee G, Kim C, Kim H, Heo Y. P10-04 Development of alternative test method for immunotoxicity prediction on chemical substances through profiling of cytokines production from THP-1 cell line. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maharjan A, Acharya M, Lee D, C PK, Kusma S, Adhikari M, Lee J, Kim J, Kim M, Park K, Park H, Hwang S, Kim C, Kim H, Heo Y. P13-06 Comparison of overall immunity levels among workers at grape or pear orchards, rose greenhouse, and open-field onion farms. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Park W, Park M, Choi K, Heo Y, Choi SY, Cho J, Ko YH, Jeong HS. Analysis of local invasion and regional spread in malignant sublingual gland tumour: Implications for surgical planning. Int J Oral Maxillofac Surg 2021; 50:1280-1288. [PMID: 33602646 DOI: 10.1016/j.ijom.2021.01.016] [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: 08/27/2020] [Revised: 11/26/2020] [Accepted: 01/19/2021] [Indexed: 11/26/2022]
Abstract
Malignant tumours arising from the sublingual glands are very rare, and the extent and frequency of local invasion or regional spread in malignant sublingual gland tumour (MSLT) has not been fully studied due to the disease rarity. To provide comprehensive features of local and regional spread of MSLT, we reviewed 20 surgical cases for detailed pathological analyses among 26 cases diagnosed as having primary MSLT. Adenoid cystic carcinoma (ACC) was the most common pathological subtype, followed by mucoepidermoid carcinoma. Disease-free and overall survivals at 5 years were 76.1 % and 77.7 %, respectively. High-grade malignant tumours and grade 2-3 ACC accounted for 41.7 % and 85.7 %. Clinical and pathological extraparenchymal extensions were found in 34.6 % and 80.0 %, respectively. Tumour invasion to the lingual nerve and submandibular gland/ductal system were also detected in 40.0 % and 28.6 %. The incidences of lingual nerve invasion in ACC and ACC ≥4 cm were 30.8 % and 42.9 %. Regional nodal involvement occurred in seven of 26 cases, and all metastatic lymph nodes were found in neck levels Ib and IIa. In summary, a significant portion of MSLT cases consisted of high-grade tumours and grade 2-3 ACC; therefore local invasion into adjacent structures should be cautiously evaluated in cases of MSLT.
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Affiliation(s)
- W Park
- Departments of Otorhinolaryngology - Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - M Park
- Departments of Otorhinolaryngology - Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - K Choi
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y Heo
- Departments of Otorhinolaryngology - Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S Y Choi
- Departments of Otorhinolaryngology - Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J Cho
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Y-H Ko
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H-S Jeong
- Departments of Otorhinolaryngology - Head and Neck Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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Sharma P, Heo Y, Jang BK, Liu YY, Li JY, Yang CH, Seidel J. Structural and electronic transformation pathways in morphotropic BiFeO3. Sci Rep 2016; 6:32347. [PMID: 27581222 PMCID: PMC5007483 DOI: 10.1038/srep32347] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 07/07/2016] [Accepted: 08/02/2016] [Indexed: 11/20/2022] Open
Abstract
Phase boundaries in multiferroics, in which (anti-)ferromagnetic, ferroelectric and ferroelastic order parameters coexist, enable manipulation of magnetism and electronic properties by external electric fields through switching of the polarization in the material. It has been shown that the strain-driven morphotropic phase boundaries in a single-phase multiferroic such as BiFeO3 (BFO) can exhibit distinct electronic conductivity. However, the control of ferroelectric and phase switching and its correlation with phase boundary conductivity in this material has been a significant challenge. Supported by a thermodynamic approach, here we report a concept to precisely control different switching pathways and the associated control of electronic conductivity in mixed phase BFO. This work demonstrates a critical step to control and use non-volatile strain-conductivity coupling at the nanoscale. Beyond this observation, it provides a framework for exploring a route to control multiple order parameters coupled to ferroelastic and ferroelectric order in multiferroic materials.
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Affiliation(s)
- P Sharma
- School of Materials Science and Engineering, UNSW Australia, Sydney NSW 2052, Australia
| | - Y Heo
- School of Materials Science and Engineering, UNSW Australia, Sydney NSW 2052, Australia
| | - B-K Jang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | - Y Y Liu
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan 411105, China
| | - J Y Li
- Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195-2600, USA
| | - C-H Yang
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.,Institute for the NanoCentury, KAIST, Daejeon 305-701, Republic of Korea
| | - J Seidel
- School of Materials Science and Engineering, UNSW Australia, Sydney NSW 2052, Australia
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Abstract
Lead (Pb), an occupational and environmental toxicant, is known to induce immunomodulatory effects resulting in lowered resistance to infectious micro-organisms and altered levels of immunoglobulins in humans. Preferential activation of type-2 helper T cells and inhibition of type-1 T-cell activation is considered a cellular mechanism for the Pb-induced immune alteration, which has not been investigated well in humans. Lead's influence on in vivo balance between type-1 and type-2 activities was assessed among workers exposed to Pb through battery manufacturing in Korea. Serum IgE levels were significantly higher in the workers with a blood Pb level (PbB) of ≤30 μg/dL than in the workers with a PbB of <30 μg/dL. Furthermore, the serum IgE concentrations significantly correlated with PbB although no significant relationship between PbB and serum interleukin-4 or interferon gamma levels was observed. The present study indicates that elevation of IgE levels may be an immunologic index for Pb-induced in vivo toxicities, potentially involved with progression of various allergic diseases in humans.
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Affiliation(s)
- Y Heo
- Catholic University of Daegu, Department of Occupational Health, 330 Kumrak 1-ri, Hayang-eup, Kyongsan-si, Kyongbuk, Korea
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Lee SH, Lee JA, Park HS, Song YS, Jang YJ, Kim JH, Lee YJ, Heo Y. Associations among SPARC mRNA expression in adipose tissue, serum SPARC concentration and metabolic parameters in Korean women. Obesity (Silver Spring) 2013; 21:2296-302. [PMID: 23666856 DOI: 10.1002/oby.20183] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 11/12/2012] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Secreted protein acidic and rich in cysteine (SPARC) is expressed in most tissues and is also secreted by adipocytes. The associations of SPARC mRNA expression in visceral adipose tissue (VAT), subcutaneous abdominal adipose tissue (SAT), serum SPARC concentration, and metabolic parameters in Korean women are investigated. DESIGN AND METHODS This is a cross-sectional study. Fifty-eight women were recruited, of whom 15 women who underwent bariatric surgery for morbid obesity (BMI mean ± SD: 40.2±5.7 kg/m(2) ), 16 who underwent metabolic surgery for type 2 diabetes (BMI: 28.9±4.5 kg/m(2) ), and, as a control group, 27 who underwent gynecological surgery (BMI: 22.7±2.4 kg/m(2) ). Anthropometric variables, metabolic parameters, SPARC mRNA expression in adipose tissue, and serum SPARC concentration were measured. RESULTS In all subjects, SPARC mRNA expression was significantly higher in SAT than in VAT. Serum SPARC concentrations (mean ± SE) in morbidly obese subjects, subjects with type 2 diabetes, and normal weight subjects were 267.3±40.2 ng/mL, 130.4±33.0 ng/mL, and 53.1±2.8 ng/mL, respectively. SPARC mRNA in SAT was significantly correlated with BMI, whereas SPARC mRNA in VAT was significantly correlated with BMI and VAT area. Serum SPARC concentration was significantly correlated with BMI, waist circumference, total adipose tissue area, and SAT area. After BMI adjustment, serum SPARC concentration was significantly correlated with fasting insulin concentration and HOMA-IR score. Multivariate regression analysis showed that BMI and HOMA-IR were independently associated with serum SPARC concentration. CONCLUSIONS Serum SPARC concentration is significantly correlated with obesity indices and might be influenced by insulin resistance. These findings suggest that SPARC may contribute to the metabolic dysregulation associated with obesity in humans.
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MESH Headings
- Adipose Tissue/metabolism
- Adult
- Asian People
- Case-Control Studies
- Cross-Sectional Studies
- Diabetes Mellitus, Type 2/ethnology
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/metabolism
- Diabetes Mellitus, Type 2/surgery
- Female
- Gene Expression
- Humans
- Metabolism/genetics
- Middle Aged
- Obesity, Morbid/ethnology
- Obesity, Morbid/genetics
- Obesity, Morbid/metabolism
- Obesity, Morbid/surgery
- Osteonectin/blood
- Osteonectin/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Young Adult
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Affiliation(s)
- S H Lee
- Department of Family Medicine, University of Ulsan College of Medicine, Seoul, Korea
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14
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Lau A, Heo Y, Li J, Fok A. Degree of conversion through full-field strain measurement in dental composites. Dent Mater 2012. [DOI: 10.1016/j.dental.2012.07.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Cho E, Kim B, Choi S, Han J, Jin J, Han J, Lim J, Heo Y, Kim S, Sung GY, Kang S. Design and fabrication of label-free biochip using a guided mode resonance filter with nano grating structures by injection molding process. J Nanosci Nanotechnol 2011; 11:417-421. [PMID: 21446467 DOI: 10.1166/jnn.2011.3277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper introduces technology to fabricate a guided mode resonance filter biochip using injection molding. Of the various nanofabrication processes that exist, injection molding is the most suitable for the mass production of polymer nanostructures. Fabrication of a nanograting pattern for guided mode resonance filters by injection molding requires a durable metal stamp, because of the high injection temperature and pressure. Careful consideration of the optimized process parameters is also required to achieve uniform sub-wavelength gratings with high fidelity. In this study, a metallic nanostructure pattern to be used as the stamp for the injection molding process was fabricated using electron beam lithography, a UV nanoimprinting process, and an electroforming process. A one-dimensional nanograting substrate was replicated by injection molding, during which the process parameters were controlled. To evaluate the geometric quality of the injection molded nanograting patterns, the surface profile of the fabricated nanograting for different processing conditions was analyzed using an atomic force microscope and a scanning electron microscope. Finally, to demonstrate the feasibility of the proposed process for fabricating guided mode resonance filter biochips, a high-refractive-index material was deposited on the polymer nanograting and its guided mode resonance characteristics were analyzed.
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Affiliation(s)
- E Cho
- School of Mechanical Engineering, Yonsei University, 134, Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
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16
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Cabrera L, Heo Y, Takayama S, Smith G. Inverse Relationship of Polydimethylsiloxane Thickness and Embryo Development Is Due to Elevated Media Osmolality. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Abstract
Increased antigen-specific IgE expression is a hallmark of the allergic response in mice. IgG1 may also be involved. Co-injection of mice with diesel exhaust particles (DEP) and ovalbumin three times over a 2 week period lead to a rapid and marked elevation of ovalbumin-specific IgE, IgG1 and also IgG2a, compared with ovalbumin alone. When DEP were injected 1 day before or after ovalbumin on each occasion, their adjuvant effect was considerably muted, suggesting that the adjuvant effect of DEP is short-lived, or that a physical interaction between ovalbumin and DEP is required. DEP were extracted with methylene chloride. Both the resulting core carbon particles and the organic extract enhanced ovalbumin specific IgE and IgG1 levels. Thus the adjuvant effect of DEP in this model is due both to the physical and the chemical attributes of the particles. The tricyclic hydrocarbons phenanthene (the most prevalent polycyclic aromatic hydrocarbon in DEP) and anthracene were both capable of enhancing antigen-specific IgE and IgG1 production. The phenolic antioxidant, butylated hydroxyanisole, which can affect gene expression via the antioxidant responsive element (ARE), had a lesser effect. Two agonists for the aryl hydrocarbon receptor, 3-methychloranthrene and 2,3,7,8-tetrachlorodibenzo-p-dioxin, either were without effect or suppressed the response, suggesting that DEP adjuvancy may not be mediated by this receptor.
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Affiliation(s)
- Y Heo
- Department of Pathology and Laboratory Medicine and Jonsson Comprehensive Cancer Center, UCLA School of Medicine, University of California, Los Angeles, CA 90095-1680, USA.
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18
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Abstract
1 Antimony (Sb), an industrial and environmental toxicant, is known to cause dermatitis and pulmonary inflammations, but the immunomodulatory effects of environmental or occupational exposure to Sb have not been reported. To initiate investigation of Sb-induced alterations of the immune system, the concentrations of the IgG subclasses, IgE, interleukin-2, interferon-gamma, and interleukin-4 in sera obtained from workers exposed to Sb through antimony trioxide manufacture were determined and compared with those of control subjects. 2 The serum levels of IgG1, an immunoglobulin involved in host defense against many microbial infections, were significantly lower in the sera of Sb-exposed individuals than the controls. The serum concentrations of IgE, an immunoglobulin mediating allergic hypersensitivity, also were lower in the Sb-exposed workers than the controls. In addition, the levels of interleukin-2 and interferon-gamma, multifunctional cytokines for T-cell mediated immunity, were lowered in the factory workers. 3 A significant positive correlation between IgG4 and urine Sb levels was found among the Sb-exposed workers, indicating a possible role of IgG4 in Sb-mediated pulmonary or skin pathogenesis. 4 The present study provides the first report on immune alterations induced by occupational exposure to Sb and suggests that Sb exposure disturbs immunohomeostasis in humans observed as a function of aberrant serum cytokine and immunoglobulin levels, which could influence health.
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Affiliation(s)
- H A Kim
- Department of Preventive Medicine, The Catholic University of Korea, Seoul, Korea
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19
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Abstract
Lead (Pb) is known to have detrimental effects on the central nervous, hematopoietic, renal, and immune systems. Herein, it is demonstrated that Pb can skew T cell reactivities by preferentially enhancing the development of Th2 cells and inhibiting the development of Th1 cells. When naive splenic CD4+ T cells from DO11.10 ovalbumin-specific transgenic (OVA-tg) mice or OVA-tg/RAG2-/- mice were developed in vitro in the presence of Pb, preferential skewing toward Th2 cells was evident. The Pb-driven skewing toward Th2 was blocked significantly in the presence of exogenous IL-12 or anti-IL-4 mAbs. Although Pb and dibutyryl cAMP (dbcAMP) appear to have similar effects on the development and reactivity of Th1 cells, unlike Pb, dbcAMP did not enhance Th2 development/activity. Further evidence of Pb's differential T cell effects was observed, in that regardless of the activation stimuli (Ag/APC; anti-CD3; PMA + ionomycin), the addition of PbCl2 consistently resulted in significant inhibition of IFN gamma production by a Th1 clone and in increased IL-4 production by a Th2 clone. In vitro addition of IL-12 overcame Pb's inhibition of Th1 cells. Th1 cells treated with a phosphodiesterase inhibitor had significantly elevated [cAMP]i levels following anti-CD3 activation in the presence of Pb, suggesting that Pb may inhibit Th1 development by enhancing adenylate cyclase activity and elevating the [cAMP]i level. Similar to Pb, a low concentration (10 microM) of dbcAMP inhibited IFN gamma production by Th1, which was prevented by IL-12; however, inhibition of protein kinase A activity by KT5720 did not reverse these effects. These results indicate that the environmental toxicant Pb can modify immune reactivities by significantly altering the differentiation of precursor or naive Th cells as well as by directly inhibiting Th1 cells and stimulating Th2 cells.
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Affiliation(s)
- Y Heo
- Wadsworth Center, New York State Department of Health, Albany 12201, USA
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20
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Heo Y, Lee WT, Lawrence DA. In vivo the environmental pollutants lead and mercury induce oligoclonal T cell responses skewed toward type-2 reactivities. Cell Immunol 1997; 179:185-95. [PMID: 9268502 DOI: 10.1006/cimm.1997.1160] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An oligoclonal utilization of Vbetas has been reported for pathogenesis of several autoimmune diseases, anti-tumorigenic activity, and superantigen-regulation of thymic T cell development. Altered ratios of Th1 and Th2 cells also are observed in immunodysregulations, leading to impaired cell-mediated immunity with an increased incidence of infectious disease or cancer and/or aberrant immunity that could culminate with an autoimmune disease. Lead (Pb) and mercury (Hg) are known pollutants with immunodisrupting activities; Hg is known to cause autoimmune glomerulonephritis. Both metals are known to suppress host resistance to pathogens. To further evaluate the manner by which these metals cause in vivo immunomodulation, their in vivo effects on Vbeta expression were evaluated along with the Th1 and Th2 frequency. Exposure of BALB/c mice to PbCl2 or HgCl2 induced an oligoclonal response with increases of Vbeta 5+, Vbeta 7+, and Vbeta 13+ CD4+ splenic, but not thymic, T cells. A significantly skewed frequency of Pb-induced splenic Th2 cells expressing Vbeta 7 or Vbeta 13 over Th1 cells was determined by limiting dilution analysis, but this Th2 predominance was not observed with CD4+ T cells expressing Vbeta 8. DO11.10 transgenic mouse exposed to Pb and antigen also demonstrated a skewed type-2 response evidenced by significantly increased IgE levels, lowered IFN-gamma levels, and increased IgG1 and lowered IgG2a anti-OVA levels. Even in the absence of specific T cell responses to a Pb-induced antigen, due to the restricted T cell specificity in the transgenic mouse model, Pb still was able to skew the response toward type-2 reactivity. However, this skewing occurred only in the presence of antigen. Therefore, the Pb-induced oligoclonal T cell response in BALB/c mice which must be initiated by self-antigens and was predominately type-2 may be responsible for autoantibody production and the detrimental health effects associated with Pb exposure.
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MESH Headings
- Animals
- CD4-Positive T-Lymphocytes/drug effects
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- Clone Cells/drug effects
- Clone Cells/metabolism
- Down-Regulation/drug effects
- Down-Regulation/genetics
- Down-Regulation/immunology
- Environmental Pollutants/toxicity
- Epitopes/genetics
- Lead/toxicity
- Lymphocyte Activation/drug effects
- Lymphocyte Activation/genetics
- Mercury/toxicity
- Mice
- Mice, Inbred BALB C
- Mice, Transgenic
- Ovalbumin/immunology
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/drug effects
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Th1 Cells/drug effects
- Th1 Cells/immunology
- Th1 Cells/metabolism
- Th2 Cells/drug effects
- Th2 Cells/immunology
- Th2 Cells/metabolism
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Affiliation(s)
- Y Heo
- Wadsworth Center, New York State Department of Health, Albany, New York 12201, USA
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21
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Abstract
An imbalance between helper T cell type 1 (Th1) and helper T cell type 2 (Th2) activation can result in immunodysregulations leading to impaired cell-mediated immunity with an increased incidence of infectious disease or cancer and/or aberrant humoral immunity that may culminate with an autoimmune disease. Mercury, a heavy-metal toxicant, is known to induce renal autoimmunity characterized by a predominant Th2 response. Lead, another metal toxicant, causes enhanced B cell activities and impairs host resistance to several bacterial and viral infections. In addition, Pb was reported to enhance Th2 proliferation and inhibit Th1 proliferation. The differential effects of Pb on Th subset activation have been further investigated. In vitro IL-4 production by a Th2 clone was significantly increased by the addition of PbCl2, whereas IFN gamma production by a Th1 clone was decreased by the addition of PbCl2. When BALB/c mice were subcutaneously exposed to PbCl2, ex vivo Il-4 production by anti-CD3-stimulated splenic T cells was enhanced, but IFN gamma production was inhibited. Additionally, the plasma IL-4 and IgE levels of Pb-exposed mice were increased, and the plasma IFN gamma levels were significantly lowered in the absence of any additional exogenous antigen. In vitro, ex vivo, and in vivo treatment with HgCl2 produced similar findings. This study is the first report of the preferential activation of a Th2 response by Pb in vivo and suggests that PB, like Hg, may induce autoimmune responses by upsetting the balance between Th1- and Th2-like cells, which could enhance production of antibodies to self antigens.
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Affiliation(s)
- Y Heo
- Wadsworth Center, New York State Department of Health, Albany 12201, USA
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22
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Masters PS, Koetzner CA, Kerr CA, Heo Y. Optimization of targeted RNA recombination and mapping of a novel nucleocapsid gene mutation in the coronavirus mouse hepatitis virus. J Virol 1994; 68:328-37. [PMID: 8254744 PMCID: PMC236292 DOI: 10.1128/jvi.68.1.328-337.1994] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
We have recently described a method of introducing site-specific mutations into the genome of the coronavirus mouse hepatitis virus (MHV) by RNA recombination between cotransfected genomic RNA and a synthetic subgenomic mRNA (C. A. Koetzner, M. M. Parker, C. S. Ricard, L. S. Sturman, and P. S. Masters, J. Virol. 66:1841-1848, 1992). By using a thermolabile N protein mutant of MHV (Alb4) as the recipient virus and synthetic RNA7 (the mRNA for the nucleocapsid protein N) as the donor, we selected engineered recombinant viruses as heat-stable progeny resulting from cotransfection. We have now been able to greatly increase the efficiency of targeted recombination in this process by using a synthetic defective interfering (DI) RNA in place of RNA7. The frequency of recombination is sufficiently high that, with Alb4 as the recipient, recombinants can be directly identified without using thermal selection. The synthetic DI RNA has been used to demonstrate that the lesion in another temperature-sensitive and thermolabile MHV mutant, Alb1, maps to the N gene. Sequencing of the Alb1 N gene revealed two closely linked point mutations that fall in a region of the N molecule previously noted as being the most highly conserved region among all of the coronavirus N proteins. Analysis of revertants of the Alb1 mutant revealed that one of the two mutations is critical for the temperature-sensitive phenotype; the second mutation is phenotypically silent.
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Affiliation(s)
- P S Masters
- Wadsworth Center for Laboratories and Research, New York State Department of Health, Albany 12201
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23
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Butler JE, Heo Y, Adams P, Richerson HB. The antigen-limited nature of microtiter ELISAs requires partial depletion of IgG to permit reliable determination of rabbit serum IgA antibody activity. Mol Immunol 1990; 27:319-25. [PMID: 2359410 DOI: 10.1016/0161-5890(90)90044-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The antigen-limiting nature of microtiter ELISAs predicts that antibodies of minor classes may be underestimated when the same specimen contains large amounts of IgG antibodies specific for the same antigen. Such competitive inhibition can be diagnosed from ELISA titration plots. A method is described to eliminate the negative effects of this competition on the detection of IgA antibodies in rabbit serum. The detectability of rabbit serum antibodies to ovalbumin and bovine serum albumin is increased 10-fold by prior treatment of 1:100 dilutions of serum with 1% Cowan I S. aureus. High concns of S. aureus, e.g. 10%, completely deplete serum IgG without loss of IgA. However, concns higher than 1% do not lead to additional improvement in the detectability of IgA antibodies in the systems studied. The method is rapid, inexpensive and shows no non-specific depletion of IgA from either serum or bronchoalveolar lavage fluid.
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Affiliation(s)
- J E Butler
- Department of Microbiology, University of Iowa Medical School, Iowa City 52242
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