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Gür B, Afacan B, Çevik Ö, Köse T, Emingil G. Gingival crevicular fluid periodontal ligament-associated protein-1, sclerostin, and tumor necrosis factor-alpha levels in periodontitis. J Periodontol 2023; 94:1166-1175. [PMID: 37006132 DOI: 10.1002/jper.22-0750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/04/2023]
Abstract
BACKGROUND In periodontitis, the equilibrium between bone formation and resorption skews in favor of bone loss. Periodontal ligament-associated protein-1 (PLAP-1) and sclerostin play a significant role in the suppression of bone formation. Tumor necrosis factor-alpha (TNF-α) is a central proinflammatory cytokine related to periodontal bone loss. This study aims to assess gingival crevicular fluid (GCF) PLAP-1, sclerostin, and TNF-α levels in individuals with periodontal disease. METHODS Seventy-one individuals diagnosed with generalized stage III grade C periodontitis (n = 23), gingivitis (n = 24), and periodontal health (n = 24) were included in the study. Full-mouth clinical periodontal measurements were performed. PLAP-1, sclerostin, and TNF-α total amounts in GCF were quantified by ELISA. Nonparametric methods were used for the data analyses. RESULTS Periodontitis group exhibited significantly higher GCF PLAP-1, sclerostin and TNF-α levels compared with gingivitis and periodontally healthy groups (p < 0.05). GCF PLAP-1 and TNF-α levels of gingivitis group were higher than healthy controls (p < 0.05) whereas GCF sclerostin levels were similar in two groups (p > 0.05). Significant positive correlations were found between GCF PLAP-1, sclerostin and TNF-α levels and all clinical parameters (p < 0.01). CONCLUSIONS To our knowledge, this is the first study showing GCF PLAP-1 levels in periodontal health and disease. Increased GCF PLAP-1 and sclerostin levels and their correlations with TNF-α in periodontitis imply that those molecules might be involved in the pathogenesis of periodontal disease. Further studies in larger mixed cohorts are needed to enlighten the possible role of PLAP-1 and sclerostin in periodontal bone loss.
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Affiliation(s)
- Berkay Gür
- Department of Periodontology, Faculty of Dentistry, Aydın Adnan Menderes University, Aydın, Turkey
| | - Beral Afacan
- Department of Periodontology, Faculty of Dentistry, Aydın Adnan Menderes University, Aydın, Turkey
| | - Özge Çevik
- Department of Biochemistry, School of Medicine, Aydın Adnan Menderes University, Aydın, Turkey
| | - Timur Köse
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, İzmir Ege University, İzmir, Turkey
| | - Gülnur Emingil
- Department of Periodontology, Faculty of Dentistry, İzmir Ege University, İzmir, Turkey
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2
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Chen WA, Dou Y, Fletcher HM, Boskovic DS. Local and Systemic Effects of Porphyromonas gingivalis Infection. Microorganisms 2023; 11:470. [PMID: 36838435 PMCID: PMC9963840 DOI: 10.3390/microorganisms11020470] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/16/2023] Open
Abstract
Porphyromonas gingivalis, a gram-negative anaerobe, is a leading etiological agent in periodontitis. This infectious pathogen can induce a dysbiotic, proinflammatory state within the oral cavity by disrupting commensal interactions between the host and oral microbiota. It is advantageous for P. gingivalis to avoid complete host immunosuppression, as inflammation-induced tissue damage provides essential nutrients necessary for robust bacterial proliferation. In this context, P. gingivalis can gain access to the systemic circulation, where it can promote a prothrombotic state. P. gingivalis expresses a number of virulence factors, which aid this pathogen toward infection of a variety of host cells, evasion of detection by the host immune system, subversion of the host immune responses, and activation of several humoral and cellular hemostatic factors.
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Affiliation(s)
- William A Chen
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Yuetan Dou
- Division of Microbiology and Molecular Genetics, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Hansel M Fletcher
- Division of Microbiology and Molecular Genetics, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Danilo S Boskovic
- Division of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA
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3
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He L, Kang Q, Chan KI, Zhang Y, Zhong Z, Tan W. The immunomodulatory role of matrix metalloproteinases in colitis-associated cancer. Front Immunol 2023; 13:1093990. [PMID: 36776395 PMCID: PMC9910179 DOI: 10.3389/fimmu.2022.1093990] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/07/2022] [Indexed: 01/22/2023] Open
Abstract
Matrix metalloproteinases (MMPs) are an important class of enzymes in the body that function through the extracellular matrix (ECM). They are involved in diverse pathophysiological processes, such as tumor invasion and metastasis, cardiovascular diseases, arthritis, periodontal disease, osteogenesis imperfecta, and diseases of the central nervous system. MMPs participate in the occurrence and development of numerous cancers and are closely related to immunity. In the present study, we review the immunomodulatory role of MMPs in colitis-associated cancer (CAC) and discuss relevant clinical applications. We analyze more than 300 pharmacological studies retrieved from PubMed and the Web of Science, related to MMPs, cancer, colitis, CAC, and immunomodulation. Key MMPs that interfere with pathological processes in CAC such as MMP-2, MMP-3, MMP-7, MMP-9, MMP-10, MMP-12, and MMP-13, as well as their corresponding mechanisms are elaborated. MMPs are involved in cell proliferation, cell differentiation, angiogenesis, ECM remodeling, and the inflammatory response in CAC. They also affect the immune system by modulating differentiation and immune activity of immune cells, recruitment of macrophages, and recruitment of neutrophils. Herein we describe the immunomodulatory role of MMPs in CAC to facilitate treatment of this special type of colon cancer, which is preceded by detectable inflammatory bowel disease in clinical populations.
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Affiliation(s)
- Luying He
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Qianming Kang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Ka Iong Chan
- Macao Centre for Research and Development in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, Macao SAR, China
| | - Yang Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Zhangfeng Zhong
- Macao Centre for Research and Development in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, Macao SAR, China,*Correspondence: Zhangfeng Zhong, ; Wen Tan,
| | - Wen Tan
- School of Pharmacy, Lanzhou University, Lanzhou, China,*Correspondence: Zhangfeng Zhong, ; Wen Tan,
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4
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Chaves Filho AJM, Mottin M, Lós DB, Andrade CH, Macedo DS. The tetrapartite synapse in neuropsychiatric disorders: Matrix metalloproteinases (MMPs) as promising targets for treatment and rational drug design. Biochimie 2022; 201:79-99. [PMID: 35931337 DOI: 10.1016/j.biochi.2022.07.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 06/26/2022] [Accepted: 07/26/2022] [Indexed: 02/06/2023]
Abstract
Inflammation and an exacerbated immune response are widely accepted contributing mechanisms to the genesis and progression of major neuropsychiatric disorders. However, despite the impressive advances in understanding the neurobiology of these disorders, there is still no approved drug directly linked to the regulation of inflammation or brain immune responses. Importantly, matrix metalloproteinases (MMPs) comprise a group of structurally related endopeptidases primarily involved in remodeling extracellular matrix (ECM). In the central nervous system (CNS), these proteases control synaptic plasticity and strength, patency of the blood-brain barrier, and glia-neuron interactions through cleaved and non-cleaved mediators. Several pieces of evidence have pointed to a complex scenario of MMPs dysregulation triggered by neuroinflammation. Furthermore, major psychiatric disorders' affective symptoms and neurocognitive abnormalities are related to MMPs-mediated ECM changes and neuroglia activation. In the past decade, research efforts have been directed to broad-spectrum MMPs inhibitors with frustrating clinical results. However, in the light of recent advances in combinatorial chemistry and drug design technologies, specific and CNS-oriented MMPs modulators have been proposed as a new frontier of therapy for regulating ECM properties in the CNS. Therefore, here we aim to discuss the state of the art of MMPs and ECM abnormalities in major neuropsychiatric disorders, namely depression, bipolar disorder, and schizophrenia, the possible neuro-immune interactions involved in this complex scenario of MMPs dysregulation and propose these endopeptidases as promising targets for rational drug design.
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Affiliation(s)
- Adriano José Maia Chaves Filho
- Neuropharmacology Laboratory, Drug Research and Development Center, Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil; Laboratory for Molecular Modeling and Drug Design - LabMol, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil.
| | - Melina Mottin
- Laboratory for Molecular Modeling and Drug Design - LabMol, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Deniele Bezerra Lós
- Neuropharmacology Laboratory, Drug Research and Development Center, Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
| | - Carolina Horta Andrade
- Laboratory for Molecular Modeling and Drug Design - LabMol, Faculty of Pharmacy, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Danielle S Macedo
- Neuropharmacology Laboratory, Drug Research and Development Center, Department of Physiology and Pharmacology, Faculty of Medicine, Universidade Federal do Ceará, Fortaleza, CE, Brazil
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5
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Inoue H, Lan L, Ke Z, Yang Y, Zheng F, Mao D, Goda S. Effects of S-PRG filler eluate on MMP-1 and MMP-3 secretion by human gingival fibroblasts. Dent Mater J 2021; 41:159-166. [PMID: 34602584 DOI: 10.4012/dmj.2021-062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to investigate the effects of surface reaction-type pre-reacted glass-ionomer (S-PRG) filler eluate on Matrix metalloproteinase (MMP)-1 and MMP-3 secretion by human gingival fibroblasts (HGF). The S-PRG filler eluate contains 6 ions (F, Na, Al, B, Sr and Si) released from the S-PRG filler. The S-PRG filler eluate stimulation induced a slight secretion of MMP-1 and MMP-3 by HGF. It also enhanced the phosphorylation of p38 and ERK. The increase in MMP-1 and MMP-3 secretion by the inflammatory cytokine TNF-α was suppressed by the S-PRG filler eluate. TNF-α-induced increases in the phosphorylation of ERK were slightly enhanced by S-PRG filler eluate. These findings may prompt the development of new therapeutic agents for oral inflammation with materials composed of S-PRG filler eluate.
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Affiliation(s)
| | - Lan Lan
- Department of Physiology, Osaka Dental University
| | - Zhengjian Ke
- Department of Physiology, Osaka Dental University
| | - Yan Yang
- Department of Physiology, Osaka Dental University
| | - Feng Zheng
- Department of Physiology, Osaka Dental University
| | - Dan Mao
- Department of Physiology, Osaka Dental University
| | - Seiji Goda
- Department of Physiology, Osaka Dental University
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Nakagawa M, Shirasugi M, Yamamoto T, Nakaya T, Kanamura N. Long-term exposure to butyric acid induces excessive production of matrix metalloproteases in human gingival fibroblasts. Arch Oral Biol 2021; 123:105035. [PMID: 33485112 DOI: 10.1016/j.archoralbio.2020.105035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 12/22/2020] [Accepted: 12/28/2020] [Indexed: 01/29/2023]
Abstract
OBJECTIVE The purpose of this study was to clarify the relationship between bacteria-induced butyric acid and periodontal disease progression. DESIGN Normal human gingival fibroblasts were exposed to butyric acid (0, 1, 5, 10, and 15 mM) adjusted to a pH of 7.2-7.4 using sodium hydroxide for 0-96 h and cell viability was evaluated. In addition, the effects of butyric acid on the production of matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs) in gingival fibroblasts were analyzed by real-time RT-PCR, ELISA, western blotting, and stromelysin zymography. RESULTS Butyric acid reduced the viability of gingival fibroblasts in a concentration- and time-dependent manner. Furthermore, butyric acid promoted production of MMP-1, MMP-3, and MMP-10 in gingival fibroblasts and suppressed TIMP-2 protein production. CONCLUSIONS Butyric acid promoted overproduction of MMPs, resulting in a disruption of the balance between MMPs and TIMPs expression in gingival fibroblasts. Our study suggests that the butyric acid produced by causative bacteria stimulates excessive MMP expression in periodontal tissue, leading to destruction of the tissue.
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Affiliation(s)
- Maki Nakagawa
- Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Kyoto, Japan; Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Michihiro Shirasugi
- Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Kyoto, Japan; Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan; Department of Dentistry and Oral Surgery, Mitsubishi Kyoto Hospital, Kyoto, Japan
| | - Toshiro Yamamoto
- Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takaaki Nakaya
- Department of Infectious Diseases, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | - Narisato Kanamura
- Department of Dental Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Lee SA, Park BR, Moon SM, Shin SH, Kim JS, Kim DK, Kim CS. Cynaroside protects human periodontal ligament cells from lipopolysaccharide-induced damage and inflammation through suppression of NF-κB activation. Arch Oral Biol 2020; 120:104944. [PMID: 33099251 DOI: 10.1016/j.archoralbio.2020.104944] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/22/2020] [Accepted: 10/07/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To investigate whether cynaroside protects human periodontal ligament (hPDL) cells from lipopolysaccharide (LPS)-induced damage and inflammation and to analyze the underlying mechanism. METHODS LPS was used to stimulate hPDL and RAW264.7 cells. MTT assay was used to detect cell viability, and protein expression levels were measured via western blot analysis. Nitrite oxide and prostaglandin E2 were used to quantify the inflammatory response. Alizarin Red S staining was used to detect mineralized nodules. RESULTS Cynaroside inhibited the expression of iNOS, COX-2, TNF-α, and IL-6 in LPS-stimulated hPDL and RAW264.7 cells without cytotoxicity. Furthermore, cynaroside significantly suppressed LPS-induced protein expression of matrix metalloproteinase 3. Additionally, cynaroside prevented LPS-induced NF-κB p65 subunit translocation to the nucleus by inhibiting the phosphorylation and degradation of IκB-α. Moreover, cynaroside could restore the mineralization ability of hPDL cells reduced by LPS. CONCLUSION Cynaroside protected hPDL cells from LPS-induced damage and inflammation via inhibition of NF-κB activation. These results suggest that cynaroside may be a potential therapeutic agent for the alleviation of periodontitis.
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Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, College of Health and Welfare, Kyungwoon University, 730, Gangdong-ro, Gyeongsangbuk-do, 39160, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju, 61007, Republic of Korea
| | - Sang Hun Shin
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
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Tranexamic acid has positive effect in early period of tendon healing by stimulating the tumor necrosis factor-alpha and matrix metalloproteinase-3 expression levels. Jt Dis Relat Surg 2020; 31:463-469. [PMID: 32962576 PMCID: PMC7607962 DOI: 10.5606/ehc.2020.74265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Objectives
This study aims to evaluate the effect of tranexamic acid (TXA) application in tendon healing by using its immunohistochemical effects on tumor necrosis factor-alpha (TNF-α), matrix metalloproteinase-3 (MMP-3), and transforming growth factor-beta (TGF-β) expression; and to identify if TNF-α, MMP-3, and TGF-β can be used to monitor and evaluate tendon healing or not in tenotomized rat Achilles tendons. Materials and methods
Twelve male Wistar-Albino rats (age 6-7-month-old; weighing 300-350 g) were used in this retrospective study conducted between November 2016 and May 2017. The rats were divided into two groups with similar weights. The right legs of the rats were determined as the study group (TXA), and the left legs as the control serum physiologic (SP) group. Under anesthesia, bilateral Achilles tenotomy was performed and surgically repaired. 1 mL of TXA was applied locally for the right side and 1 mL of SP was locally applied for the left side. Half of the rats were sacrificed at the third week (right leg-TXA3, left leg-SP3) and the other half at sixth week (right leg-TXA6, left leg-SP6) and tendon samples were taken from the extremities. Immunohistochemical findings of TNF-α, MMP-3, and TGF-β were evaluated on the basis of the frequency and intensity of staining. Results
In TNF-α and MMP-3 and TXA groups, there was a significant difference in staining compared to SP groups (p<0.05). Regarding TNF-α expression, the total index score in the TXA6 subgroup was higher than the TXA3, SP6, and SP3 subgroups (8, 7, 3, and 4, respectively). Overall scores of TNF-α showed that TXA groups had significantly higher scores when compared to SP groups (p<0.05). In addition, total MMP-3 expression scores were significantly higher in TXA groups than in SP groups, respectively; TXA3: 14, TXA6: 11, SP3: 10, and SP6: 9 (p<0.05). However, the degree of staining with TNF-α was found to be significantly lower than MMP-3 (p<0.05). Immunohistochemical reactivity was not observed with TGF-β. Conclusion Tranexamic acid has positive effect in early period of tendon healing by stimulating the TNF-α and MMP-3 expression levels. TNF-α and MMP-3 can be used to monitor and evaluate tendon healing.
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Chang HW, Sudirman S, Yen YW, Mao CF, Ong AD, Kong ZL. Blue Mussel ( Mytilus edulis) Water Extract Ameliorates Inflammatory Responses and Oxidative Stress on Osteoarthritis in Obese Rats. J Pain Res 2020; 13:1109-1119. [PMID: 32606898 PMCID: PMC7293401 DOI: 10.2147/jpr.s244372] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 03/06/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose To investigate the effects of Mytilus edulis water extract (MWE) on an anterior cruciate ligament transection and a partial medial meniscectomy surgery to induced osteoarthritis (OA) with the high-fat diet (HFD)-induced obese rats. Methods The male Sprague-Dawley rats were fed with HFD for 4 weeks before surgery. The OA rats were orally administered with MWE (108.5, 217.0, and 542.5 mg/kg) for 6 weeks. Results The administration of MWE affected weight loss, triglycerides content, and total cholesterol level. MWE also enhanced the activity of superoxide dismutase and decreased lipid peroxidation degree. Moreover, MWE reduced proinflammatory cytokines level, alleviated inflammation and swelling of the osteoarthritic knee, and reduced loss of proteoglycan in articular cartilage tissue. Conclusion MWE suppressed proinflammatory mediators and attenuated the cartilage degradation and pain in osteoarthritis rats under obesity condition. Therefore, MWE has the potential to act as an alternative for osteoarthritis treatment.
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Affiliation(s)
- Heng-Wei Chang
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Sabri Sudirman
- Fisheries Product Technology, Faculty of Agriculture, Universitas Sriwijaya, Palembang, Ogan Ilir Regency 30862, Indonesia
| | - Yu-Wen Yen
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Chien-Feng Mao
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Alan Darmasaputra Ong
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Zwe-Ling Kong
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
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Sudirman S, Chen CK, Long BT, Chang HW, Tsou D, Kong ZL. Vitellaria paradoxa Nut Triterpene-Rich Extract Ameliorates Symptoms of Inflammation on Post-Traumatic Osteoarthritis in Obese Rats. J Pain Res 2020; 13:261-271. [PMID: 32099450 PMCID: PMC6997037 DOI: 10.2147/jpr.s228766] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 12/10/2019] [Indexed: 12/23/2022] Open
Abstract
Purpose To investigate the ameliorative effects of Vitellaria paradoxa (VP) nut extract for an anterior cruciate ligament transection with medial meniscectomy (ACLT+MMx)-induced osteoarthritis (OA) in high-fat diet (HFD)-induced obese rats. Methods The rats were fed by HFD for 5 weeks before surgery-induced OA. Rats were treated orally with three different doses of VP nut extract (111.6, 223.2, and 446.4 mg/kg) for 8 weeks. Results The VP nut triterpene-rich extract decreased the level of triglycerides and increased high-density lipoprotein-cholesterol. The level of nitric oxide, interleukin (IL)-1β, IL-6, and tumor necrosis factor-α decreased after treatment with VP nut triterpene-rich extract, especially in high-doses. The VP nut triterpene-rich extracts also alleviated swelling in the knee OA, weight-bearing difference, and suppressed cartilage degradation. Conclusion The Vitellaria paradoxa nut triterpene-rich extract suppressed proinflammatory mediators and attenuated the cartilage degradation and pain in osteoarthritis with an obesity rat model. As such, Vitellaria paradoxa nut triterpene-rich extract can be used as an alternative for osteoarthritis treatment.
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Affiliation(s)
- Sabri Sudirman
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Chun-Kai Chen
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Bing-Ting Long
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Heng-Wei Chang
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - David Tsou
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
| | - Zwe-Ling Kong
- Department of Food Science, National Taiwan Ocean University, Keelung City 20224, Taiwan
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11
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Mirastschijski U, Lupše B, Maedler K, Sarma B, Radtke A, Belge G, Dorsch M, Wedekind D, McCawley LJ, Boehm G, Zier U, Yamamoto K, Kelm S, Ågren MS. Matrix Metalloproteinase-3 is Key Effector of TNF-α-Induced Collagen Degradation in Skin. Int J Mol Sci 2019; 20:ijms20205234. [PMID: 31652545 PMCID: PMC6829232 DOI: 10.3390/ijms20205234] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 10/17/2019] [Indexed: 12/15/2022] Open
Abstract
Inflammatory processes in the skin augment collagen degradation due to the up-regulation of matrix metalloproteinases (MMPs). The aim of the present project was to study the specific impact of MMP-3 on collagen loss in skin and its interplay with the collagenase MMP-13 under inflammatory conditions mimicked by the addition of the pro-inflammatory cytokine tumor necrosis factor-α (TNF-α). Skin explants from MMP-3 knock-out (KO) mice or from transgenic (TG) mice overexpressing MMP-3 in the skin and their respective wild-type counterparts (WT and WTT) were incubated ex vivo for eight days. The rate of collagen degradation, measured by released hydroxyproline, was reduced (p < 0.001) in KO skin explants compared to WT control skin but did not differ (p = 0.47) between TG and WTT skin. Treatment with the MMP inhibitor GM6001 reduced hydroxyproline media levels from WT, WTT and TG but not from KO skin explants. TNF-α increased collagen degradation in the WT group (p = 0.0001) only. More of the active form of MMP-13 was observed in the three MMP-3 expressing groups (co-incubation with receptor-associated protein stabilized MMP-13 subforms and enhanced detection in the media). In summary, the innate level of MMP-3 seems responsible for the accelerated loss of cutaneous collagen under inflammatory conditions, possibly via MMP-13 in mice.
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Affiliation(s)
- Ursula Mirastschijski
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Blaž Lupše
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Kathrin Maedler
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Bhavishya Sarma
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Arlo Radtke
- Faculty of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Gazanfer Belge
- Faculty of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Martina Dorsch
- Institute for Laboratory Animal Science, Hannover Medical School, 30625 Hannover, Germany.
| | - Dirk Wedekind
- Institute for Laboratory Animal Science, Hannover Medical School, 30625 Hannover, Germany.
| | - Lisa J McCawley
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37232-6840, USA.
| | - Gabriele Boehm
- Department of General, Visceral and Oncologic Surgery, Klinikum Bremen-Mitte, 28177 Bremen, Germany.
| | - Ulrich Zier
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Kazuhiro Yamamoto
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L69 3BX, United Kingdom.
| | - Sørge Kelm
- Center for Biomolecular Interactions Bremen, Department of Biology and Biochemistry, University of Bremen, 28359 Bremen, Germany.
| | - Magnus S Ågren
- Digestive Disease Center and Copenhagen Wound Healing Center, Bispebjerg Hospital, University of Copenhagen, 2400 Copenhagen, Denmark.
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Sudirman S, Chang HW, Chen CK, Kong ZL. A dietary polysaccharide from Eucheuma cottonii downregulates proinflammatory cytokines and ameliorates osteoarthritis-associated cartilage degradation in obese rats. Food Funct 2019; 10:5697-5706. [PMID: 31435629 DOI: 10.1039/c9fo01342c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Osteoarthritis (OA) is a common form of arthritis, which is characterized by the degeneration of articular cartilage, leading to joint dysfunction. Oral drug therapy seems to ameliorate some signs and symptoms of OA, but may be accompanied by side effects and does not appear to be effective long-term. Seaweed has received much attention for pharmacological application due to its various biomedical properties, including the anti-inflammation, antitumor, and antioxidant effects. This study investigated the ameliorative effects of a dietary polysaccharide from Eucheuma cottonii extract (ECE) on an anterior cruciate ligament transection with partial medial meniscectomy surgery (ACLT+MMx) to induce OA in high-fat diet (HFD)-induced obese rats. Male Sprague-Dawley rats were fed an HFD for 12 weeks before ACLT+MMx surgery, after which they were administered a daily oral gavage of saline (Sham, OB Sham, and OBOA) and either low-dose ECE (100 mg per kg body weight), high-dose ECE (400 mg per kg body weight), or glucosamine sulfate as a positive control (OBOAGS; 200 mg per kg body weight) for 5 weeks. Treatment with ECE decreased the body weight, triglyceride and total cholesterol (TC) levels, and the TC/high-density lipoprotein (HDL)-C ratio in the obese rats. Additionally, ECE downregulated the expression of proinflammatory cytokines, including tumor necrosis factor-α, interleukin-1β, and leptin, and suppressed nuclear factor-kappa B and extracellular-signal-regulated kinase-1/2 expression, resulting in a decrease in the levels of matrix metalloproteinase (MMP)-1 and MMP-13 and prostaglandin-E2 and attenuated cartilage degradation. These results demonstrate that the dietary polysaccharide from ECE can suppress OA development in obese rats, suggesting its potential efficacy as a promising candidate for OA treatment.
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Affiliation(s)
- Sabri Sudirman
- Department of Food Science, National Taiwan Ocean University, Keelung City, Taiwan.
| | - Heng-Wei Chang
- Department of Food Science, National Taiwan Ocean University, Keelung City, Taiwan.
| | - Chun-Kai Chen
- Department of Food Science, National Taiwan Ocean University, Keelung City, Taiwan.
| | - Zwe-Ling Kong
- Department of Food Science, National Taiwan Ocean University, Keelung City, Taiwan.
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13
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Bonilla-Gutiérrez AF, López C, Carmona JU. Regenerative Therapies for the Treatment of Tenodesmic Injuries in Horses. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2018.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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14
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Lata M, Hettinghouse AS, Liu CJ. Targeting tumor necrosis factor receptors in ankylosing spondylitis. Ann N Y Acad Sci 2018; 1442:5-16. [PMID: 30008173 DOI: 10.1111/nyas.13933] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/19/2018] [Accepted: 06/27/2018] [Indexed: 02/06/2023]
Abstract
Over the past two decades, considerable advances in our understanding of inflammatory and immune pathways have allowed for the growing use of targeted biologic therapy. Most notably, the introduction of tumor necrosis factor (TNF) inhibitors has dramatically changed the management of autoimmune inflammatory disorders, including ankylosing spondylitis (AS). Despite the efficacy of TNF inhibitors documented in multiple clinical trials, anti-TNF therapy in AS is far from foolproof; it is associated with serious adverse effects and limited response to therapy in some patients. Moreover, specific questions regarding the role of TNF as a mediator of AS remain unanswered. Therefore, additional efforts are needed in order to better understand the role of TNF in the pathogenesis of AS and to develop safer and more effective treatment strategies. The purpose of this review is to better the understanding of the physiologic and pathogenic roles of TNF signaling in the course of AS. Relevant TNF biology and novel approaches to TNF blockade in AS are discussed.
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Affiliation(s)
- Michal Lata
- Department of Orthopedic Surgery, New York University Medical Center, Hospital for Joint Diseases, New York, New York
| | - Aubryanna S Hettinghouse
- Department of Orthopedic Surgery, New York University Medical Center, Hospital for Joint Diseases, New York, New York
| | - Chuan-Ju Liu
- Department of Orthopedic Surgery, New York University Medical Center, Hospital for Joint Diseases, New York, New York.,Department of Cell Biology, New York University School of Medicine, New York, New York
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15
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Zhang Y, Jiang J, Xie J, Xu C, Wang C, Yin L, Yang L, Sung KLP. Combined effects of tumor necrosis factor-α and interleukin-1β on lysyl oxidase and matrix metalloproteinase expression in human knee synovial fibroblasts in vitro. Exp Ther Med 2017; 14:5258-5266. [PMID: 29285051 PMCID: PMC5740568 DOI: 10.3892/etm.2017.5264] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 01/13/2017] [Indexed: 12/23/2022] Open
Abstract
Previous studies have demonstrated that inflammatory cytokines are associated with matrix metalloproteinases (MMPs) and/or lysyl oxidases (LOXs) produced by anterior cruciate ligament (ACL) fibroblasts, which may contribute to the poor healing ability of the ACL. To evaluate whether the synovium also participates in ACL healing, the inflammatory microenvironment of the knee joint cavity was mimicked following ACL injury, and the combined effects of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) on the expression of MMPs and LOXs in synovial fibroblasts were studied. Cell viability was evaluated using trypan blue staining in the presence of TNF-α and IL-1β, and the expression of LOXs and MMPs was measured by reverse transcription-quantitative polymerase chain reaction. MMP-2 activity was also measured by zymography. The results indicated that the combined effects of TNF-α and IL-1β inhibited LOX expression, while promoting MMP-1, −2 and −3 expression and MMP-2 activity in synovial fibroblasts. These changes may impede healing by altering the balance between the degradative and biosynthetic arms of the ligament tissue remodeling process. Collectively, the present results suggest that the poor healing ability of cruciate ligaments may be due to the sensitivity of the synovium to inflammatory factors. Therefore, the synovium potentially serves a key regulatory role in the joint cavity microenvironment and in the healing process of the ACL, and thus should be considered as a therapeutic target to aid in the treatment of patients with ACL trauma.
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Affiliation(s)
- Yanjun Zhang
- Department of Life Science, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P.R. China.,Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Jiahuan Jiang
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Jing Xie
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Chunming Xu
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Chunli Wang
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Lin Yin
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Li Yang
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China
| | - Kuo-Li Paul Sung
- Laboratory of Biomechanics and Tissue Repair, Bioengineering College, Chongqing University, Chongqing 400044, P.R. China.,Departments of Bioengineering and Orthopedics, University of California, San Diego, California 92093-0412, USA
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16
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Lee CT, Teles R, Kantarci A, Chen T, McCafferty J, Starr JR, Brito LCN, Paster BJ, Van Dyke TE. Resolvin E1 Reverses Experimental Periodontitis and Dysbiosis. THE JOURNAL OF IMMUNOLOGY 2016; 197:2796-806. [PMID: 27543615 DOI: 10.4049/jimmunol.1600859] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/23/2016] [Indexed: 12/14/2022]
Abstract
Periodontitis is a biofilm-induced inflammatory disease characterized by dysbiosis of the commensal periodontal microbiota. It is unclear how natural regulation of inflammation affects the periodontal biofilm. Promoters of active resolution of inflammation, including resolvin E1 (RvE1), effectively treat inflammatory periodontitis in animal models. The goals of this study were 1) to compare periodontal tissue gene expression in different clinical conditions, 2) to determine the impact of local inflammation on the composition of subgingival bacteria, and 3) to understand how inflammation impacts these changes. Two clinically relevant experiments were performed in rats: prevention and treatment of ligature-induced periodontitis with RvE1 topical treatment. The gingival transcriptome was evaluated by RNA sequencing of mRNA. The composition of the subgingival microbiota was characterized by 16S rDNA sequencing. Periodontitis was assessed by bone morphometric measurements and histomorphometry of block sections. H&E and tartrate-resistant acid phosphatase staining were used to characterize and quantify inflammatory changes. RvE1 treatment prevented bone loss in ligature-induced periodontitis. Osteoclast density and inflammatory cell infiltration in the RvE1 groups were lower than those in the placebo group. RvE1 treatment reduced expression of inflammation-related genes, returning the expression profile to one more similar to health. Treatment of established periodontitis with RvE1 reversed bone loss, reversed inflammatory gene expression, and reduced osteoclast density. Assessment of the rat subgingival microbiota after RvE1 treatment revealed marked changes in both prevention and treatment experiments. The data suggest that modulation of local inflammation has a major role in shaping the composition of the subgingival microbiota.
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Affiliation(s)
- Chun-Teh Lee
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA 02142; and
| | - Ricardo Teles
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA 02142; and
| | - Alpdogan Kantarci
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA 02142; and
| | - Tsute Chen
- Department of Microbiology, The Forsyth Institute, Cambridge, MA 02142
| | - Jon McCafferty
- Department of Microbiology, The Forsyth Institute, Cambridge, MA 02142
| | - Jacqueline R Starr
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA 02142; and
| | | | - Bruce J Paster
- Department of Microbiology, The Forsyth Institute, Cambridge, MA 02142
| | - Thomas E Van Dyke
- Department of Applied Oral Sciences, The Forsyth Institute, Cambridge, MA 02142; and
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17
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S100A4 upregulation suppresses tissue ossification and enhances matrix degradation in experimental periodontitis models. Acta Pharmacol Sin 2015; 36:1388-94. [PMID: 26499072 DOI: 10.1038/aps.2015.77] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/31/2015] [Indexed: 01/09/2023] Open
Abstract
AIM S100A4, also known as fibroblast-specific protein 1 or metastasin 1, is not only highly expressed in growth-stimulated cultured cells and metastatic tumor cells, but also in the periodontal ligament. The aim of this study was to investigate the roles of S100A4 in the pathogenesis of periodontitis and its regulatory mechanisms in inflammatory milieu. METHODS Experimental periodontitis was induced in rats by submarginal silk ligatures. TRAP activity and S100A4 expression in periodontal ligaments were examined using immunohistochemistry and immunofluorescence methods. IL-1β-treated human periodontal ligament cells (hPDLCs) were used as in vitro model of experimental periodontitis. S100A4 mRNA and protein were assessed using qRT-PCR and Western blot, respectively. hPDLCs were transfected with either S100A4 overexpression plasmids or shRNAs plasmids. The mineralization in hPDLCs was evaluated with a 12-d osteogenic induction assay, and the expression of ALP, OCN, MMP-2 and MMP-13 was analyzed by qRT-PCR. RESULTS In the periodontal ligaments of rats with experimental periodontitis, TRAP activity and S100A4 protein staining were considerably more intense compared with those in the control rats. Treatment of hPDLCs with IL-1β (10, 50 and 100 ng/mL) dose-dependently increased the mRNA and protein levels of S100A4. Transfection with shRNAs markedly increased mineralized nodule formation and the osteogenic-related markers ALP and OCN levels in hPDLCs, whereas the overexpression of S100A4 significantly reduced mineralized nodule formation, and increased the matrix degradation enzymes MMP-2 and MMP-13 levels in hPDLCs. CONCLUSION S100A4 is upregulated in the experimental rat periodontitis and in IL-1β-treated hPDLCs, where S100A4 suppresses osteogenic differentiation and enhances matrix degradation. Thus, S100A4 is a potential target for the treatment of periodontitis.
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18
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Sanchavanakit N, Saengtong W, Manokawinchoke J, Pavasant P. TNF-α stimulates MMP-3 production via PGE2 signalling through the NF-kB and p38 MAPK pathway in a murine cementoblast cell line. Arch Oral Biol 2015; 60:1066-74. [PMID: 25956994 DOI: 10.1016/j.archoralbio.2015.04.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 03/26/2015] [Accepted: 04/10/2015] [Indexed: 01/18/2023]
Abstract
BACKGROUND Cementoblasts are considered to play an important role in the homeostasis of periodontal tissues under both physiologic and pathologic conditions. Matrix metalloproteinases (MMPs) is the key family of enzymes participating in extracellular matrix remodelling. In the present study, the effects and regulatory mechanisms of tumour necrosis factor (TNF)-α on the expression of MMPs and their inhibitors (tissue inhibitor of metalloproteinases; TIMPs) were investigated. MATERIALS AND METHODS OCCM-30, an immortalised murine cementoblast cell line, was stimulated with TNF-α at 1 and 10ng/ml for 24h. The expression of Mmp-2, Mmp-3, Mmp-13, Mmp-14, Timp-1, and Timp-2 as well as PGE2 was determined. Inhibitors of MAPKs, PI3K/Akt, NF-kB and Cox-2 were employed to reveal possible TNF-α induced regulatory signalling pathway(s). The mRNA and protein expression were analysed by (semi)quantitative real-time PCR and enzyme-linked immunosorbent assay (ELISA), respectively. RESULTS TNF-α dose-dependently stimulated MMP-3 expression by cementoblasts. This was found for mRNA as well as protein expression. No significant differences were found in the mRNA expression of Mmp-2, Mmp-13, Mmp-14, Timp-1, and Timp-2 upon TNF-α stimulation. The level of PGE2, however, was significantly increased along with MMP-3. Treatment with a selective Cox-2 inhibitor resulted in partial suppression of TNF-α-induced Mmp-3 mRNA expression. Addition of PGE2 enhanced Mmp-3 mRNA in a dose dependent manner, suggesting an inductive effect of TNF-α partly via PGE2. The up-regulation of Mmp-3 by TNF-α was completely suppressed by a combination of NF-kB and p38 MAPK inhibitors, while partial suppression was found with each inhibitor. The effect of PGE2 on Mmp-3 expression was abolished by treating cells with an NF-kB inhibitor; a p38 MAPK inhibitor had only a small effect. CONCLUSIONS The present study indicates that cementoblasts respond to TNF-α by increasing MMP-3 production partially via PGE2 and signalling through the NF-kB and p38 MAPK pathway. MMP-3 may participate in periodontal tissue degradation/remodelling.
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Affiliation(s)
- Neeracha Sanchavanakit
- Research Unit of Mineralized Tissue, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand; Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Weerayut Saengtong
- Research Unit of Mineralized Tissue, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Jeeranan Manokawinchoke
- Research Unit of Mineralized Tissue, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand; Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Prasit Pavasant
- Research Unit of Mineralized Tissue, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand; Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
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19
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Zhu L, Dissanayaka WL, Green DW, Zhang C. Stimulation of EphB2/ephrin-B1 signalling by tumour necrosis factor alpha in human dental pulp stem cells. Cell Prolif 2015; 48:231-8. [PMID: 25643922 DOI: 10.1111/cpr.12172] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 11/08/2014] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES The aim of this study was to investigate whether in vitro stimulation of dental pulp stem cells (DPSCs) by tumour necrosis factor alpha (TNF-α) would induce secretion of EphB2/ephrin-B1 signalling. MATERIALS AND METHODS Dental pulp stem cells isolated from human dental pulp were treated with TNF-α (5-100 ng/ml) over 2-48 h. EphB2/ephrin-B1 mRNA and protein levels were measured by real-time polymerase chain reaction (RT-PCR) and western blot analysis respectively. Additionally, DPSCs were pre-incubated with TNF-α receptor neutralizing antibodies or infected with nuclear factor-kappa B (NF-ĸB) inhibitor, p38 MAPK inhibitor, Jun N-terminal kinase (JNK) inhibitor and MEK inhibitor before TNF-α treatment. Results were analysed by one-way ANOVA. RESULTS Tumour necrosis factor alpha increased EphB2 mRNA expression in DPSCs at concentrations up to 20 ng/ml and ephrin-B1 at concentrations up to 40 ng/ml (P < 0.05). Its mRNA expression reached maximum at 24 h when treated with TNF-α at 20 ng/ml (P < 0.05). EphB2/ephrin-B1 protein expression levels were high at 16 and 24 h as shown by western blotting. Neutralizing antibodies for TNFR1/2 receptors down-regulated EphB2/ephrin-B1 mRNA expression (P < 0.05) and ephrin-B1 protein expression, but not EphB2 protein expression. JNK-inhibitor inhibited EphB2 mRNA expression only (P < 0.05). CONCLUSIONS EphB2/ephrin-B1 were invoked in DPSCs with TNF-α treatment via the JNK-dependent pathway, but not NF-ĸB, p38 MAPK or MEK signalling.
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Affiliation(s)
- Lifang Zhu
- Comprehensive Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
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Joo NE, Miao D, Bermúdez M, Stallcup WB, Kapila YL. Shedding of NG2 by MMP-13 attenuates anoikis. DNA Cell Biol 2015; 33:854-62. [PMID: 25166220 DOI: 10.1089/dna.2014.2399] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Disruption of cell-matrix interactions can lead to anoikis-apoptosis due to loss of matrix contacts. We previously showed that Nerve/glial antigen 2 (NG2) is a novel anoikis receptor. Specifically, overexpression of NG2 leads to anoikis propagation, whereas its suppression leads to anoikis attenuation. Interestingly, NG2 expression decreases in late anoikis, suggesting that NG2 reduction is also critical to this process. Thus, we hypothesized that NG2 undergoes cleavage to curtail anoikis propagation. Further, since matrix metalloproteinases (MMPs) cleave cell surface receptors, play a major role in modulating apoptosis, and are associated with death receptor cleavage during apoptosis, we further hypothesized that cleavage of NG2 could be mediated by MMPs to regulate anoikis. Indeed, anoikis conditions triggered release of the NG2 extracellular domain into condition media during late apoptosis, and this coincided with increased MMP-13 expression. Treatment with an MMP-13 inhibitor and MMP-13 siRNA increased anoikis, since these treatments blocked NG2 release. Further, NG2-positive cells exhibited increased anoikis upon MMP-13 inhibition, whereas MMP-13 inhibition did not increase anoikis in NG2-null cells, corroborating that retention of NG2 on the cell membrane is critical for sustaining anoikis, and its cleavage for mediating anoikis attenuation. Similarly, NG2 suppression with siRNA inhibited NG2 release and anoikis. In contrast, MMP-13 overexpression or exogenous MMP-13 reduced anoikis by more effectively shedding NG2. In conclusion, maintenance of NG2 on the cell surface promotes anoikis propagation, whereas its shedding by MMP-13 actions attenuates anoikis. Given that these findings are derived in the context of periodontal ligament fibroblasts, these data have implications for periodontal inflammation and periodontal disease pathogenesis.
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Affiliation(s)
- Nam E Joo
- 1 Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan , Ann Arbor, Michigan
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Biomechanical adaptation of the bone-periodontal ligament (PDL)-tooth fibrous joint as a consequence of disease. J Biomech 2013; 47:2102-14. [PMID: 24332618 DOI: 10.1016/j.jbiomech.2013.10.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 10/26/2013] [Accepted: 10/31/2013] [Indexed: 01/07/2023]
Abstract
In this study, an in vivo ligature-induced periodontitis rat model was used to investigate temporal changes to the solid and fluid phases of the joint by correlating shifts in joint biomechanics to adaptive changes in soft and hard tissue morphology and functional space. After 6 and 12 weeks of ligation, coronal regions showed a significant decrease in alveolar crest height, increased expression of TNF-α, and degradation of attachment fibers as indicated by decreased collagen birefringence. Cyclical compression to peak loads of 5-15N at speeds of 0.2-2.0mm/min followed by load relaxation tests showed decreased stiffness and reactionary load rate values, load relaxation, and load recoverability, of ligated joints. Shifts in joint stiffness and reactionary load rate increased with time while shifts in joint relaxation and recoverability decreased between control and ligated groups, complementing measurements of increased tooth displacement as evaluated through digital image correlation. Shifts in functional space between control and ligated joints were significantly increased at the interradicular (Δ10-25μm) and distal coronal (Δ20-45μm) regions. Histology revealed time-dependent increases in nuclei elongation within PDL cells and collagen fiber alignment, uncrimping, and directionality, in 12-week ligated joints compared to random orientation in 6-week ligated joints and to controls. We propose that altered strains from tooth hypermobility could cause varying degrees of solid-to-fluid compaction, alter dampening characteristics of the joint, and potentiate increased adaptation at the risk of joint failure.
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