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Etoh D, Harada T, Shimauchi A, Ibusuki R, Kayukawa T, Okamatsu Y, Inoue K, Tsubouchi K. Incidence and characteristic of adrenal insufficiency due to immune checkpoint inhibitors therapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz438.016] [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] Open
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2
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Osakabe L, Utsumi A, Saito B, Okamatsu Y, Kinouchi H, Nakamaki T, Hironaka S. Influence of Oral Anaerobic Bacteria on Hematopoietic Stem Cell Transplantation Patients: Oral Mucositis and General Condition. Transplant Proc 2018; 49:2176-2182. [PMID: 29149979 DOI: 10.1016/j.transproceed.2017.09.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 09/22/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Oral mucositis (OM) caused by infection facilitated by myelosuppression and immunosuppression can be controlled through oral care. We investigated changes in oral anaerobic bacterial flora during the onset of OM with hematopoietic stem cell transplantation (HSCT). METHODS This study included 19 patients who underwent HSCT. All received professional oral care before initiating the preparative regimen. We assessed OM, oral health and obtained microbial samples from the oral cavity during 5 assessment points: before initiating the preparative regimen; the day before HSCT (day 1); and at 7, 14, and 30 days after HSCT. Microbial species were identified by using a mass spectrometer. RESULTS The number of patients with serious OM increased initially after HSCT and decreased thereafter. Many Streptococcus species were identified before HSCT, but these gradually decreased and were replaced by coagulase-negative staphylococci. An increase in Candida species after HSCT and the identification of Enterococcus species were significantly associated with OM. Nutritional status recovery and prognosis were significantly worse in patients who developed OM. CONCLUSIONS To the best of our knowledge, this study is the first which shows that anaerobic bacteria were identified in patients' oral flora before and after HSCT by using a mass spectrometer. These results indicate that Enterococcus species and Candida species may have been associated with OM. OM affected the patients' improvement in nutritional status and their prognosis. We concluded that it is important to provide more complete oral care instructions and interventions to prevent these bacterial infections.
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Affiliation(s)
- L Osakabe
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Tokyo, Japan
| | - A Utsumi
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Tokyo, Japan.
| | - B Saito
- Department of Medicine, Division of Hematology, Showa University School of Medicine, Tokyo, Japan
| | - Y Okamatsu
- Dentistry and Oral Surgery, Showa University Hospital, Tokyo, Japan; Division of Community Based Comprehensive Dentistry, Department of Special Needs Dentistry, Showa University School of Dentistry, Tokyo, Japan
| | - H Kinouchi
- Dentistry and Oral Surgery, Showa University Hospital, Tokyo, Japan
| | - T Nakamaki
- Department of Medicine, Division of Hematology, Showa University School of Medicine, Tokyo, Japan
| | - S Hironaka
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Tokyo, Japan
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Usui M, Sato T, Yamamoto G, Okamatsu Y, Hanatani T, Moritani Y, Sano K, Yamamoto M, Nakashima K. Gingival epithelial cells support osteoclastogenesis by producing receptor activator of nuclear factor kappa B ligand via protein kinase A signaling. J Periodontal Res 2015; 51:462-70. [PMID: 26432443 DOI: 10.1111/jre.12323] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND OBJECTIVE Periodontal disease is dental plaque-induced inflammatory disease of the periodontal tissues that results in bone loss in the affected teeth. During bone resorption, receptor activator of nuclear factor kappa B ligand (RANKL) is an essential factor that regulates osteoclastogenesis. Recently, we found that gingival epithelial cells (GECs) in periodontal tissue produce RANKL, the expression of which is regulated by tumor necrosis factor-α and protein kinase A signaling. In this study, we asked whether RANKL-producing GECs induce bone marrow macrophages (BMMs) to form osteoclasts in a co-culture system. MATERIAL AND METHODS Ca9-22 GECs and osteoclast precursor BMMs were co-cultured with or without the protein kinase A signaling activator forskolin or inhibitor H89 to examine whether the RANKL-producing GECs could be induced to form osteoclasts, as determined using a pit formation assay. RESULTS Osteoclasts formed spontaneously in co-cultures of Ca9-22 cells and BMMs, even in the absence of RANKL. The cells were cultured on bone slices for 14 d, at which time resorption pits were observed. Forskolin treatment significantly increased osteoclast numbers in these co-cultures, but forskolin alone did not induce osteoclast formation by BMMs. CONCLUSION GECs producing RANKL are able to support osteoclastogenesis in an in vitro co-culture system using GECs and BMMs, in a process promoted by forskolin.
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Affiliation(s)
- M Usui
- Department of Cardiology and Periodontology, Division of Periodontology, Kyushu Dental University, Kitakyushu City, Fukuoka, Japan.,Department of Periodontology, Showa University School of Dentistry, Ohta-ku, Tokyo, Japan
| | - T Sato
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Iruma-gun, Saitama, Japan
| | - G Yamamoto
- Department of Oral Pathology and Diagnosis, Showa University School of Dentistry, Shinagawa-ku, Tokyo, Japan
| | - Y Okamatsu
- Dental Clinic, Showa University Medical Hospital, Shinagawa-ku, Tokyo, Japan
| | - T Hanatani
- Department of Cardiology and Periodontology, Division of Periodontology, Kyushu Dental University, Kitakyushu City, Fukuoka, Japan
| | - Y Moritani
- Department of Cardiology and Periodontology, Division of Periodontology, Kyushu Dental University, Kitakyushu City, Fukuoka, Japan
| | - K Sano
- Department of Cardiology and Periodontology, Division of Periodontology, Kyushu Dental University, Kitakyushu City, Fukuoka, Japan
| | - M Yamamoto
- Department of Periodontology, Showa University School of Dentistry, Ohta-ku, Tokyo, Japan
| | - K Nakashima
- Department of Cardiology and Periodontology, Division of Periodontology, Kyushu Dental University, Kitakyushu City, Fukuoka, Japan
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Fujihara R, Usui M, Yamamoto G, Nishii K, Tsukamoto Y, Okamatsu Y, Sato T, Asou Y, Nakashima K, Yamamoto M. Tumor necrosis factor-α enhances RANKL expression in gingival epithelial cells via protein kinase A signaling. J Periodontal Res 2013; 49:508-17. [DOI: 10.1111/jre.12131] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2013] [Indexed: 01/11/2023]
Affiliation(s)
- R. Fujihara
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
| | - M. Usui
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
- Division of Periodontology; Departmetnt of Cariology and Periodontology; Kyushu Dental University; Kitakyushu City Fukuoka Japan
| | - G. Yamamoto
- Department of Oral Pathology and Diagnosis; Showa University School of Dentistry; Tokyo Japan
| | - K. Nishii
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
- Department of Oral Pathology and Diagnosis; Showa University School of Dentistry; Tokyo Japan
| | - Y. Tsukamoto
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
| | - Y. Okamatsu
- Dental Clinic; Showa University Medical Hospital; Tokyo Japan
| | - T. Sato
- Department of Oral and Maxillofacial Surgery; Saitama Medical University; Saitama Japan
| | - Y. Asou
- Department of Orthopaedic Surgery; Tokyo Medical and Dental University; Tokyo Japan
| | - K. Nakashima
- Division of Periodontology; Departmetnt of Cariology and Periodontology; Kyushu Dental University; Kitakyushu City Fukuoka Japan
| | - M. Yamamoto
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
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Takahashi N, Kobayashi M, Takaki T, Takano K, Miyata M, Okamatsu Y, Hasegawa K, Nishihara T, Yamamoto M. Actinobacillus actinomycetemcomitans lipopolysaccharide stimulates collagen phagocytosis by human gingival fibroblasts. ACTA ACUST UNITED AC 2008; 23:259-64. [PMID: 18402614 DOI: 10.1111/j.1399-302x.2007.00414.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Collagen phagocytosis by fibroblasts is involved in the intracellular pathway related to collagen breakdown in soft connective tissues. The possible role of lipopolysaccharide (LPS) in regulating this fibroblast function has not been elucidated so we investigated the effect of LPS from Actinobacillus actinomycetemcomitans, a periodontopathic bacterium, on collagen phagocytic activity in human gingival fibroblasts and associated regulatory mechanisms. METHODS LPS pretreatment stimulated binding of collagen-coated beads to cells and, subsequently, their internalization. RESULTS The LPS-activated collagen phagocytic process was enhanced in the presence of the soluble form of CD14 (sCD14) or LPS-binding protein (LBP), while the LPS/LBP treatment activated Akt and induced actin reorganization. Furthermore, these LPS/LBP-induced effects were partially suppressed by adding phosphatidyl-inositol-3 kinase (PI3K) inhibitors. CONCLUSION These results suggest that A. actinomycetemcomitans LPS disturbs the homeostasis of collagen metabolism within gingival tissue by facilitating collagen phagocytosis by gingival fibroblasts, and serum sCD14 and LBP positively regulate the action of LPS. In addition, the PI3K/Akt signaling is thought to partially mediate the LPS/LBP-stimulated collagen phagocytic pathway, which may be dependent on actin cytoskeletal rearrangement.
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Affiliation(s)
- N Takahashi
- Department of Periodontology, Showa University School of Dentistry, Tokyo, Japan
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Oikawa A, Kobayashi M, Okamatsu Y, Shinki T, Kamijo R, Yamamoto M, Hasegawa K. Mitogen-activated protein kinases mediate interleukin-1?-induced receptor activator of nuclear factor-?B ligand expression in human periodontal ligament cells. J Periodontal Res 2007; 42:367-76. [PMID: 17559635 DOI: 10.1111/j.1600-0765.2006.00959.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND OBJECTIVE Interleukin-1beta-stimulated receptor activator of nuclear factor-kappaB ligand (RANKL) expression in human periodontal ligament cells is partially mediated by endogenous prostaglandin E2, whereas mitogen-activated protein kinases (MAPKs) are implicated in regulating various interleukin-1-responsive genes. We investigated herein the involvement of MAPKs in interleukin-1beta-stimulated RANKL expression in human periodontal ligament cells. MATERIAL AND METHODS Human periodontal ligament cells were pretreated separately with specific inhibitors of MAPKs, including extracellular signal-regulated kinase, p38 MAPK and c-Jun N-terminal kinase, and subsequently treated with interleukin-1beta. Following each treatment, the phosphorylation of each MAPK, the expression of RANKL, and the production of prostaglandin E2 were determined. RANKL activity was evaluated using an assay to determine the survival of prefusion osteoclasts. RESULTS Interleukin-1beta induced RANKL expression at the mRNA and protein levels, as well as RANKL activity in human periodontal ligament cells. Interleukin-1beta also activated extracellular signal-regulated kinase, p38 MAPK, and c-Jun N-terminal kinase. Pretreatment with each MAPK inhibitor partially, but significantly, suppressed interleukin-1beta-induced RANKL expression and its activity, as well as prostaglandin E2 production. CONCLUSION In human periodontal ligament cells, three types of MAPK inhibitor may abrogate RANKL expression and activity induced by interleukin-1beta, directly or indirectly through partial suppression of prostaglandin E2 synthesis. In addition, extracellular signal-regulated kinase, p38 MAPK, and c-Jun N-terminal kinase signals may co-operatively mediate interleukin-1beta-stimulated RANKL expression and its activity in those cells.
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Affiliation(s)
- A Oikawa
- Department of Periodontology, Showa University School of Dentistry, Tokyo, Japan
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Matsuda K, Okamatsu Y, Tani H, Kimura K, Matsuishi T. Correlation of Plasma Ghrelin And Serum Immunoglobulin Levels: A Hormonal Link Between Immunity and Obesity? J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.045] [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: 12/01/2022]
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8
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Takaki T, Kobayashi M, Okubo K, Takahashi N, Okamatsu Y, Mochizuki S, Yamamoto M, Hasegawa K. Interferon-γ inhibits collagen phagocytosis in human fibroblasts by inducing subcortical actin assembly and reducing ability of β1 integrin to bind to collagen. Inflamm Res 2006; 55:534-42. [PMID: 17221168 DOI: 10.1007/s00011-006-5088-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE We investigated the possible roles of interferon-gamma (IFN-gamma) in modulation of extracellular and intracellular routes of collagen digestion by human fibroblasts. METHODS Human gingival fibroblasts were treated with IFN-gamma, after which matrix metalloproteinase-1 (MMP-1) activation was determined. Following the IFN-gamma treatment, cells were further incubated with either activating antibody for beta1 integrin or actin monomer-sequestering agent latrunculin B before incubation with collagen-coated fluorescent beads. Thereafter, the binding and internalization of the beads were assessed. RESULTS IFN-gamma had no significant effect on MMP-1 activation, however, it reduced the binding of collagen-coated beads in the minimum affinity range and, subsequently, internalization of the beads. The inhibitory effects of IFN-gamma were partially reversed by adding either the beta1 integrin activating antibody or latrunculin B. CONCLUSIONS Although IFN-gamma does not appreciably moderate the extracellular route of collagen digestion by human fibroblasts, the reduced level of collagen phagocytosis by IFN-gamma in the cells may contribute to fibrosis in inflamed connective tissues. Further, IFN-gamma may decrease the binding of collagen and following phagocytosis in cells by inducing a subcortical actin assembly and reducing the ability of beta1 integrin to bind to collagen.
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Affiliation(s)
- T Takaki
- Department of Periodontology, Showa University Dental School, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
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Matsuda K, Tani H, Okamatsu Y, Sakaguchi Y, Kimura K, Matsuishi T. Increment of IgE production in obese children. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.687] [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: 11/29/2022]
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Okubo K, Kobayashi M, Takiguchi T, Takada T, Ohazama A, Okamatsu Y, Hasegawa K. Participation of endogenous IGF-I and TGF-beta 1 with enamel matrix derivative-stimulated cell growth in human periodontal ligament cells. J Periodontal Res 2003; 38:1-9. [PMID: 12558931 DOI: 10.1034/j.1600-0765.2003.01607.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Previous studies have provided the biological basis for the therapeutic use of enamel matrix derivative (EMD) at sites of periodontal regeneration. A purpose of this study is to determine effects of EMD on cell growth, osteoblastic differentiation and insulin-like growth factor-I (IGF-I) and transforming growth factor-beta 1 (TGF-beta 1) production in human periodontal ligament cells (HPLC). We also examined participation of endogenous IGF-I and TGF-beta 1 with EMD-stimulated cell growth in these cells. HPLCs used in this study were treated with EMD alone or in combination with antihuman IGF-I antibody (anti-hIGF-I) or anti-hTGF-beta 1, recombinant human bone morphogenetic protein-2 (rhBMP-2), 1,25-dihydroxyvitamin D3[1,25(OH)2D3], rhTGF-beta 1 or rhIGF-I. After each treatment, cell growth, the production of IGF-I and TGF-beta 1 and the expression of osteoblastic phenotypes were evaluated. EMD stimulated cell growth in dose-dependent and time-dependent manners. EMD was also stimulated to express IGF-I and TGF-beta 1 at protein and mRNA levels. The EMD-stimulated cell growth was partially suppressed by cotreatment with anti-hIGF-I or anti-hTGF-beta 1, and cell growth was also stimulated by treatment with rhIGF-I or rhTGF-beta 1. rhBMP-2 stimulated alkaline phosphatase (ALPase) activity and ALPase mRNA expression, and 1,25(OH)2D3 stimulated ALPase and osteocalcin mRNA expression. However, EMD showed no effect on the osteoblastic phenotypes expression. These results demonstrated that EMD has no appreciable effect on osteoblastic differentiation, however it stimulates cell growth and IGF-I and TGF-beta 1 production in HPLC, and that these endogenous growth factors partially relate to the EMD-stimulated cell growth in HPLC.
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Affiliation(s)
- K Okubo
- Department of Periodontology, Showa University Dental School, Tokyo, Japan
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11
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Kobayashi M, Okada N, Okamatsu Y, Mugikura K, Nishihara T, Hanazawa S, Kitano S, Hasegawa K. Intracellular interleukin-1 alpha production in human gingival fibroblasts is differentially regulated by various cytokines. J Dent Res 1999; 78:840-9. [PMID: 10326728 DOI: 10.1177/00220345990780040401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Interleukin-1 (IL-1) may play a critical role in immune and inflammatory responses in inflamed gingiva, and it is synthesized by a wide variety of host cells. In this study, we examined the regulatory effects of various cytokines on bioactive membrane IL-1 and intracellular IL-1 alpha production in cultured human gingival fibroblasts (HGF). Recombinant human (rh) IL-1 beta stimulated membrane IL-1 activity, which was mainly attributed to IL-1 alpha. rhIL-1 beta and rh tumor necrosis factor (TNF)-alpha stimulated HGF to produce intracellular IL-1 alpha, whereas rh interleukin-6 (IL-6), rh interleukin-4 (IL-4), and rh interferon (IFN)-gamma did not do so. Intracellular IL-1 alpha production induced by rhIL-1 beta or rhTNF-alpha may be partially related to protein kinase C (PKC) activation, because rhIL-1 beta or rhTNF-alpha-induced intracellular IL-1 alpha production was stimulated by pre-treatment with 12-o-tetradecanoylphorbol 13-acetate (TPA), a PKC activator, but was suppressed by the pre-treatment with 1-(5-isoquinoline-sulfonyl) -2-methylpiperazine dihydrochloride (H-7), which is a PKC inhibitor. rhIL-4 inhibited rhIL-1 beta- or rhTNF-alpha-induced intracellular IL-1 alpha production, but rhIL-6 had no effect on this production. Pre-treatment with rh IFN-gamma remarkably enhanced intracellular IL-1 alpha production induced by subsequent treatment with rhIL-1 beta or rhTNF-alpha. Simultaneous treatment with rhIFN-gamma and rhIL-1 beta inhibited rhIL-1 beta-induced intracellular IL-1 alpha production, but co-treatment with rhIFN-gamma and rhTNF-alpha enhanced rhTNF-alpha-induced intracellular IL-1 alpha production. These results suggest that in inflamed gingiva, pro-inflammatory cytokines such as IL-1 beta and TNF-alpha may induce bioactive intracellular IL-1 alpha production in human gingival fibroblasts and that this production can be differentially modulated by T-cell-derived cytokines such as IFN-gamma or IL4.
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Affiliation(s)
- M Kobayashi
- Department of Periodontics, Showa University Dental School, Tokyo, Japan
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Okada N, Kobayashi M, Mugikura K, Okamatsu Y, Hanazawa S, Kitano S, Hasegawa K. Interleukin-6 production in human fibroblasts derived from periodontal tissues is differentially regulated by cytokines and a glucocorticoid. J Periodontal Res 1997; 32:559-69. [PMID: 9401927 DOI: 10.1111/j.1600-0765.1997.tb00932.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Interleukin-6 (IL-6) is thought to be a major mediator of the host's defense against infection, and it regulates immune responses in inflamed tissue. In this study, we investigated the regulation of IL-6 production in human gingival fibroblasts (HGF) and human periodontal ligament fibroblasts (HPLF). Pro-inflammatory cytokines including interleukin (IL)-1 alpha, IL-1 beta and tumor necrosis factor (TNF)-alpha stimulated IL-6 production in HGF and HPLF in a time- and dose-dependent manner. This IL-1 alpha, IL-1 beta, or TNF-alpha-induced IL-6 production was enhanced, but the cAMP accumulation they induced was inhibited by the addition of indomethacin. This result suggests that endogenous prostaglandin E2 (PGE2) partially inhibits IL-1 or TNF-alpha-induced IL-6 production and that the enhancement of IL-6 production by IL-1 or TNF-alpha may not be caused through endogenous PGE2-induced cAMP-dependent pathway. Dexamethasone (DEX), a glucocorticoid which is a inhibitor of nuclear factor kappa B (NF-kappa B activation, markedly inhibited IL-1 (alpha or beta) or TNF-alpha-induced IL-6 production; so this production may be partially mediated through NF-kappa B. IL-1 (alpha or beta) and TNF-alpha enhanced IL-6 production synergistically. IL-6 production in HGF or HPLF stimulated with IL-1 beta was augmented by the addition of interferon (IFN)-gamma, but was slightly suppressed by the addition of IL-4. Endogenous IL-6 enhanced IL-1 (alpha or beta)-induced IL-6 production in the presence of IL-6 soluble receptor (IL-6sR). Accordingly, in inflamed periodontal tissues, gingival fibroblasts and periodontal ligament fibroblasts stimulated with pro-inflammatory cytokines such as IL-1 or TNF-alpha, may produce IL-6, and this production can be differentially modulated by endogenous PGE2, IL-6sR, T cell-derived cytokines such as IFN-gamma or IL-4, and glucocorticoids.
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Affiliation(s)
- N Okada
- Department of Periodontics, Showa University Dental School, Tokyo, Japan
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Okamatsu Y, Kobayashi M, Nishihara T, Hasegawa K. Interleukin-1 alpha produced in human gingival fibroblasts induces several activities related to the progression of periodontitis by direct contact. J Periodontal Res 1996; 31:355-64. [PMID: 8858540 DOI: 10.1111/j.1600-0765.1996.tb00503.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Previous observations suggest that interleukin-1 (IL-1) may play an important role in the progression of periodontitis. In the present study, we investigated whether a cell-associated IL-1 alpha (CAIL-1 alpha) produced in human gingival fibroblasts (HGF) induces biological activities related to the progression of periodontitis. HGF were treated with recombinant human IL-1 beta (rhIL-1 beta) for 12 h. After that, the cell layers of HGF were washed 3 times with fresh medium and were then fixed with 1% paraformaldehyde. The fixed cell layers of HGF were used for assays for bone resorbing activity, prostaglandin E2 (PGE2) production and collagenase activity. Fixed cell layers of HGF treated with rhIL-1 beta enhanced not only calcium release from BALB/c mouse calvaria but also PGE2 production and collagenase activity in HGF and human periodontal ligament fibroblasts (HPLF) cultured on the fixed cell layers. These activities were neutralized by treatment with monoclonal mouse anti-human IL-1 alpha antibody, but monoclonal mouse anti-human IL-1 beta antibody showed no effects on these activities. The induction of these activities by fixed cell layers of HGF required direct contact between the fixed cell layers and the calvaria, HGF, or HPLF. These results suggest that CAIL-1 alpha produced in HGF treated with rhIL-1 beta induces bone resorbing activity, PGE2 production and collagenase activity in the target cells by direct contact; CAIL-1 alpha may play an important role in the progression of periodontitis.
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Affiliation(s)
- Y Okamatsu
- Department of Periodontics, Showa University, Dental School, Tokyo, Japan
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Ohazama A, Isatsu K, Hatayama J, Okamatsu Y, Tachikawa T, Hasegawa K. Periodontal tissue regeneration using fibrin tissue adhesive material in vitro and in vivo. Periodontal Clin Investig 1996; 18:26-38. [PMID: 9116461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to determine the effects of a fibrin tissue adhesive material (FAM) on periodontal tissue regeneration. In an in vitro study comparing osteogenic cells with gingival fibroblasts, it was shown that the degradation of FAM adjacent to the osteogenic cells was faster than that adjacent to the gingival fibroblasts. In two in vivo studies in dogs where surgical bony defects were created, it was shown through histometric measurements that in the sites where FAM was applied, more new bone was found than in the control sites. It was concluded that FAM may enhance periodontal tissue regeneration.
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Affiliation(s)
- A Ohazama
- Department of Periodontics, Showa University Dental School, Tokyo, Japan
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15
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Okamatsu Y. [Diagnosis and physiopathology of neuropathies with chronic progress]. Nihon Naika Gakkai Zasshi 1992; 81:210-4. [PMID: 1318922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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16
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Iwaoku R, Okamatsu Y, Kino S, Arimori K, Nakano M. Enhanced absorption of phenobarbital from suppositories containing phenobarbital povidone coprecipitate. Chem Pharm Bull (Tokyo) 1984; 32:1091-5. [PMID: 6744481 DOI: 10.1248/cpb.32.1091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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