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Oh EJ, Jang HH, Park S, Lim HP, Yun KD, Jang W, Kim OS, Park C, Won EJ. Fretibacterium Species to Fusobacterium periodonticum Ratio as a Potential Biomarker of Periodontitis Based on Salivary Microbiome Profiling. Ann Lab Med 2024:alm.2024.0043. [PMID: 38644360 DOI: 10.3343/alm.2024.0043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/10/2024] [Accepted: 04/12/2024] [Indexed: 04/23/2024] Open
Affiliation(s)
- Eun Ji Oh
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Hyun Hee Jang
- Biomedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Korea
| | - Sangwon Park
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Hyun-Pil Lim
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Kwi-Dug Yun
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Woohyung Jang
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Department of Periodontology, Chonnam National University, Gwangju, Korea
| | - Chan Park
- Department of Prosthodontics, Chonnam National University, Gwangju, Korea
| | - Eun Jeong Won
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Fu W, Liu G, Kim SH, Kim B, Kim OS, Ma G, Yang Y, Liu D, Zhu S, Kang JS, Kim O. Effects of 625 nm light-emitting diode irradiation on preventing ER stress-induced apoptosis via GSK-3β phosphorylation in MC3T3-E1. Photochem Photobiol 2024. [PMID: 38214077 DOI: 10.1111/php.13906] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/13/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024]
Abstract
Prolonged endoplasmic reticulum (ER) stress contributes to cell apoptosis and interferes with bone homeostasis. Although photobiomodulation (PBM) might be used for ER stress-induced diseases, the role of PBM in relieving cell apoptosis remains unknown. During ER stress, glycogen synthase kinase-3β (GSK-3β) is critical; however, its functions in PBM remain uncertain. Thus, this study aimed to investigate the role of GSK-3β in 625 nm light-emitting diode irradiation (LEDI) relieving tunicamycin (TM)-induced apoptosis. Based on the results, pre-625 nm LEDI (Pre-IR) phosphorylated GSK-3β via ROS production. Compared with the TM group, Pre-IR + TM group reduced the phosphorylation of the α-subunit of eukaryotic translation initiation factor 2 (eIF-2α) and B-cell lymphoma protein 2 (Bcl-2)-associated X (Bax)/Bcl-2 ratio through regulating GSK-3β. Furthermore, a similar tendency was observed between Pre-IR + TM and Pre-LiCl+TM groups in preventing TM-induced early and late apoptosis. In summary, this study suggests that the Pre-IR treatment in TM-induced ER stress is beneficial for preventing cell apoptosis via GSK-3β phosphorylation.
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Affiliation(s)
- Wenqi Fu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Guo Liu
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Department of Oral Anatomy, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Guowu Ma
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian, China
| | - Ying Yang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
- Dental Implant Center, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Danyang Liu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Siyu Zhu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jae-Seok Kang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
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Jeong CW, Kim H, Kim OS. Esthetic reconstruction of a localized severely resorbed anterior maxilla associated with peri-implantitis: A clinical report. J Prosthet Dent 2023:S0022-3913(23)00760-6. [PMID: 38103970 DOI: 10.1016/j.prosdent.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 12/19/2023]
Abstract
This clinical report described the esthetic reconstruction of a localized severely resorbed right anterior maxilla associated with peri-implantitis. For vertical bone augmentation, guided bone regeneration surgery was performed by raising a flap with the remote incision technique, followed by soft tissue grafting and vestibuloplasty. The biologically oriented preparation technique was used to improve the health and stability of the peri-implant tissues. The surgical treatment and a novel method of prosthetic rehabilitation provided excellent esthetic and functional outcomes.
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Affiliation(s)
- Cheol-Woong Jeong
- Private practice, Gwangju, Republic of Korea; and Adjunct Professor, Department of Periodontology, Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Hyeon Kim
- Graduate student, Department of Periodontology, Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Ok-Su Kim
- Professor, Department of Periodontology, Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.
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Yang Y, Kim OS, Liu G, Lee BN, Liu D, Fu W, Zhu S, Kang JS, Kim B, Kim O. Effects of Red LED Irradiation in Enhancing the Mineralization of Human Dental Pulp Cells In Vitro. Int J Mol Sci 2023; 24:ijms24119767. [PMID: 37298716 DOI: 10.3390/ijms24119767] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/02/2023] [Accepted: 06/03/2023] [Indexed: 06/12/2023] Open
Abstract
Dentin regeneration is the preferred method used to preserve dental pulp vitality after pulp exposure due to caries. Red light-emitting diode irradiation (LEDI), which is based on photobiomodulation (PBM), has been used to promote hard-tissue regeneration. However, the underlying mechanism still needs elucidation. This study aimed to explore the mechanism involved in red LEDI affecting dentin regeneration. Alizarin red S (ARS) staining revealed that red LEDI induced mineralization of human dental pulp cells (HDPCs) in vitro. We further distinguished the cell proliferation (0-6 d), differentiation (6-12 d), and mineralization (12-18 d) of HDPCs in vitro and treated cells either with or without red LEDI in each stage. The results showed that red LEDI treatment in the mineralization stage, but not the proliferation or differentiation stages, increased mineralized nodule formation around HDPCs. Western blot also indicated that red LEDI treatment in the mineralization stage, but not the proliferation or differentiation stages, upregulated the expression of dentin matrix marker proteins (dentin sialophosphoprotein, DSPP; dentin matrix protein 1, DMP1; osteopontin, OPN) and an intracellular secretory vesicle marker protein (lysosomal-associated membrane protein 1, LAMP1). Therefore, the red LEDI might enhance the matrix vesicle secretion of HDPCs. On the molecular level, red LEDI enhanced mineralization by activating the mitogen-activated protein kinase (MAPK) signaling pathways (ERK and P38). ERK and P38 inhibition reduced mineralized nodule formation and the expression of relevant marker proteins. In summary, red LEDI enhanced the mineralization of HDPCs by functioning to produce a positive effect in the mineralization stage in vitro.
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Affiliation(s)
- Ying Yang
- Dental Implant Center, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325027, China
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Guo Liu
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325027, China
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Bin-Na Lee
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Danyang Liu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Wenqi Fu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Siyu Zhu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jae-Seok Kang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
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Fu W, Im YG, Kim B, Kim OS, Yang Y, Song J, Liu D, Zhu S, Kang JS, Kim O. 625 nm Light Irradiation Prevented MC3T3-E1 Cells from Accumulation of Misfolded Proteins via ROS and ATP Production. Int J Mol Sci 2023; 24:ijms24119257. [PMID: 37298212 DOI: 10.3390/ijms24119257] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 06/12/2023] Open
Abstract
Osteoblasts must acquire a considerable capacity for folding unfolded and misfolded proteins (MPs) to produce large amounts of extracellular matrix proteins and maintain bone homeostasis. MP accumulation contributes to cellular apoptosis and bone disorders. Photobiomodulation therapy has been used to treat bone diseases, but the effects of decreasing MPs with photobiomodulation remain unclear. In this study, we explored the efficacy of 625 nm light-emitting diode irradiation (LEDI) to reduce MPs in tunicamycin (TM) induced-MC3T3-E1 cells. Binding immunoglobulin protein (BiP), an adenosine triphosphate (ATP)-dependent chaperone, is used to evaluate the capacity of folding MPs. The results revealed that pretreatment with 625 nm LEDI (Pre-IR) induced reactive oxygen species (ROS) production, leading to the increased chaperone BiP through the inositol-requiring enzyme 1 (IRE1)/X-box binding protein 1s (XBP-1s) pathway, and then restoration of collagen type I (COL-I) and osteopontin (OPN) expression relieving cell apoptosis. Furthermore, the translocation of BiP into the endoplasmic reticulum (ER) lumen might be followed by a high level of ATP production. Taken together, these results suggest that Pre-IR could be beneficial to prevent MP accumulation through ROS and ATP in TM-induced MC3T3-E1cells.
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Affiliation(s)
- Wenqi Fu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Yeong-Gwan Im
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ying Yang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jianan Song
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Danyang Liu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Siyu Zhu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jae-Seok Kang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
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Zhang Z, Song J, Kwon SH, Wang Z, Park SG, Piao X, Ryu JH, Kim N, Kim OS, Kim SH, Koh JT. Pirfenidone Inhibits Alveolar Bone Loss in Ligature-Induced Periodontitis by Suppressing the NF-κB Signaling Pathway in Mice. Int J Mol Sci 2023; 24:ijms24108682. [PMID: 37240020 DOI: 10.3390/ijms24108682] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/01/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
There has been increasing interest in adjunctive use of anti-inflammatory drugs to control periodontitis. This study was performed to examine the effects of pirfenidone (PFD) on alveolar bone loss in ligature-induced periodontitis in mice and identify the relevant mechanisms. Experimental periodontitis was established by ligating the unilateral maxillary second molar for 7 days in mice (n = 8 per group), and PFD was administered daily via intraperitoneal injection. The micro-computed tomography and histology analyses were performed to determine changes in the alveolar bone following the PFD administration. For in vitro analysis, bone marrow macrophages (BMMs) were isolated from mice and cultured with PFD in the presence of RANKL or LPS. The effectiveness of PFD on osteoclastogenesis, inflammatory cytokine expression, and NF-κB activation was determined with RT-PCR, Western blot, and immunofluorescence analyses. PFD treatment significantly inhibited the ligature-induced alveolar bone loss, with decreases in TRAP-positive osteoclasts and expression of inflammatory cytokines in mice. In cultured BMM cells, PFD also inhibited RANKL-induced osteoclast differentiation and LPS-induced proinflammatory cytokine (IL-1β, IL-6, TNF-a) expression via suppressing the NF-κB signal pathway. These results suggest that PFD can suppress periodontitis progression by inhibiting osteoclastogenesis and inflammatory cytokine production via inhibiting the NF-κB signal pathway, and it may be a promising candidate for controlling periodontitis.
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Affiliation(s)
- Zijiao Zhang
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Juhan Song
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Seung-Hee Kwon
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Zhao Wang
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Suk-Gyun Park
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Xianyu Piao
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Je-Hwang Ryu
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Nacksung Kim
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Department of Pharmacology, Chonnam National University Medical School, Gwangju 61469, Republic of Korea
| | - Ok-Su Kim
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sun-Hun Kim
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jeong-Tae Koh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
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Kim OS, Park KJ, Jin HM, Cho YN, Kim YS, Kwon SH, Koh JT, Ju JK, Kee SJ, Park YW. Activation and increased production of interleukin-17 and tumour necrosis factor-α of mucosal-associated invariant T cells in patients with periodontitis. J Clin Periodontol 2022; 49:706-716. [PMID: 35569027 DOI: 10.1111/jcpe.13648] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 07/27/2021] [Revised: 04/08/2022] [Accepted: 05/10/2022] [Indexed: 12/28/2022]
Abstract
AIM Mucosal-associated invariant T (MAIT) cells are known to be resident in oral mucosal tissue, but their roles in periodontitis are unknown. This study aimed to examine the level and function of MAIT cells in periodontitis patients. MATERIALS AND METHODS Frequency, activation, and function of MAIT cells from 28 periodontitis patients and 28 healthy controls (HCs) were measured by flow cytometry. RESULTS Circulating MAIT cells were numerically reduced in periodontitis patients. Moreover, they exhibited higher expression of CD69 and annexin V, together with more increased production of interleukin (IL)-17 and tumour necrosis factor (TNF)-α, in periodontitis patients than in HCs. Interestingly, periodontitis patients had higher frequencies of MAIT cells in gingival tissue than in peripheral blood. In addition, circulating MAIT cells had elevated expression of tissue-homing chemokine receptors such as CCR6 and CXCR6, and the corresponding chemokines (i.e., CCL20 and CXCL16) were more strongly expressed in inflamed gingiva than in healthy gingiva. CONCLUSIONS This study demonstrates that circulating MAIT cells are numerically deficient with an activated profile toward the production of IL-17 and TNF-α in periodontitis patients. Furthermore, circulating MAIT cells have the potential to migrate to inflamed gingival tissues.
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Affiliation(s)
- Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Ki-Jeong Park
- Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Hye-Mi Jin
- Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Young-Nan Cho
- Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Ye Seul Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Seung-Hee Kwon
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Jeong-Tae Koh
- Hard-Tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Jae Kyun Ju
- Department of Surgery, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Seung-Jung Kee
- Department of Laboratory Medicine, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
| | - Yong-Wook Park
- Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Republic of Korea
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Yang Y, Kim OS, Kim B, Liu G, Song J, Liu D, Ma G, Kim Y, Kim O. A Novel Fluorescent Dye Extracted from Buddleja officinalis for Labeling Mitochondria after Fixation. Scanning 2022; 2022:7486005. [PMID: 35711296 PMCID: PMC9187463 DOI: 10.1155/2022/7486005] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/25/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Mitochondria are versatile organelles and function by communicating with cellular ecosystems. The fluorescent colocalization analysis after fixation is a highly intuitive method to understand the role of mitochondria. However, there are few fluorescent dyes available for mitochondrial staining after fixation. In this study, a novel fluorescent dye (BO-dye), extracted from Buddleja officinalis, was applied for mitochondrial staining in fixed immortalized human oral keratinocytes. The BO-dye (excitation: 414 nm, emission: 677 nm) is a small fluorescent molecular dye, which can cross the cytomembrane without permeabilization. We assume that the BO-dye could aggregate and bind to the mitochondria stably. BO-dye exhibited a mega-Stokes shift (>250 nm), which is an important feature that could reduce self-quenching and enhance the signal-to-noise ratio. Analysis of photophysical properties revealed that the BO-dye is temperature and pH insensitive, and it exhibits superior photostability. These results indicate that BO-dye can be considered an alternative fluorescent dye for labeling mitochondria after fixation.
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Affiliation(s)
- Ying Yang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
- Dental Implant Center, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Guo Liu
- Department of Endodontics, School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
- Department of Conservative Dentistry, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jianan Song
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Danyang Liu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Guowu Ma
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China
| | - Young Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
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Nam YS, Yang DW, Moon JS, Kang JH, Cho JH, Kim OS, Kim MS, Koh JT, Kim YJ, Kim SH. Sclerostin in Periodontal Ligament: Homeostatic Regulator in Biophysical Force-Induced Tooth Movement. J Clin Periodontol 2022; 49:932-944. [PMID: 35373367 DOI: 10.1111/jcpe.13624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 02/25/2022] [Accepted: 03/29/2022] [Indexed: 11/30/2022]
Abstract
AIM This study elucidates the role of sclerostin in periodontal ligament (PDL) as a homeostatic regulator in biophysical force-induced tooth movement (BFTM). MATERIALS AND METHODS BFTM was performed in rats, followed by microarray, immunofluorescence, in situ hybridization, and real-time PCR for detection and identification of the molecules. The periodontal space was analyzed via micro-computed tomography. Effects on osteoclastogenesis and bone resorption were evaluated in mouse bone marrow-derived cells. In vitro human PDL cells were subjected to biophysical forces. RESULTS In the absence of BFTM, sclerostin was hardly detected in the periodontium except the PDL and alveolar bone in the furcation region and apex of the molar roots. However, sclerostin was upregulated in the PDL in vivo by adaptable force, which induced typical transfiguration without changes in periodontal space as well as in vitro PDL cells under compression and tension. In contrast, the sclerostin level was unaffected by heavy force, which caused severe degeneration of the PDL and narrowed periodontal space. Sclerostin inhibited osteoclastogenesis and bone resorption, which corroborates the accelerated tooth movement by the heavy force. CONCLUSIONS Sclerostin in PDL may be a key homeostatic molecule in the periodontium and a biological target for the therapeutic modulation of BFTM. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yoo-Sung Nam
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Dong-Wook Yang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jung-Sun Moon
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jee-Hae Kang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jin-Hyoung Cho
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Min-Seok Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jeong-Tae Koh
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Young-Jun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
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Song JH, Kim JW, Lee MN, Oh SH, Piao X, Wang Z, Kwon SH, Kim OS, Koh JT. Isolation of High Purity Mouse Mesenchymal Stem Cells through Depleting Macrophages Using Liposomal Clodronate. Tissue Eng Regen Med 2022; 19:565-575. [PMID: 34973125 PMCID: PMC9130445 DOI: 10.1007/s13770-021-00412-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/20/2021] [Accepted: 11/07/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND: The use of mouse bone marrow mesenchymal stem cells (mBMSCs) represents a promising strategy for performing preclinical studies in the field of cell-based regenerative medicine; however, mBMSCs obtained via conventional isolation methods have two drawbacks, i.e., (i) they are heterogeneous due to frequent macrophage contamination, and (ii) they require long-term culturing for expansion. METHODS: In the present study, we report a novel strategy to generate highly pure mBMSCs using liposomal clodronate. This approach is based on the properties of the two cell populations, i.e., BMSCs (to adhere to the plasticware in culture dishes) and macrophages (to phagocytose liposomes). RESULTS: Liposomal clodronate added during the first passage of whole bone marrow culture was selectively engulfed by macrophages in the heterogeneous cell population, resulting in their effective elimination without affecting the MSCs. This method allowed the generation of numerous high-purity Sca-1+CD44+F4/80− mBMSCs (> 95%) with just one passaging. Comparative studies with mBMSCs obtained using conventional methods revealed that the mBMSCs obtained in the present study had remarkably improved experimental utilities, as demonstrated by in vitro multilineage differentiation and in vivo ectopic bone formation assays. CONCLUSION: Our newly developed method, which enables the isolation of mBMSCs using simple and convenient protocol, will aid preclinical studies based on the use of MSCs. Supplementary Information The online version contains supplementary material available at 10.1007/s13770-021-00412-6.
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Affiliation(s)
- Ju Han Song
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jung-Woo Kim
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Mi Nam Lee
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Sin-Hye Oh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Xianyu Piao
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Zhao Wang
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Seung-Hee Kwon
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Ok-Su Kim
- Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.,Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Jeong-Tae Koh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea. .,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
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11
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Sun Q, Kim OS, He Y, Lim W, Ma G, Kim B, Kim Y, Kim O. Role of E2F1/ SPHK1 and HSP27 During Irradiation in a PMA-Induced Inflammatory Model. Photobiomodul Photomed Laser Surg 2021; 38:512-520. [PMID: 32780686 DOI: 10.1089/photob.2019.4801] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Background: Sphingosine kinase 1 (SPHK1) and heat shock protein 27 (HSP27) are important for antioxidant and anti-inflammatory effects after red light irradiation in an inflammatory model. Objective: The purpose of the present study was to evaluate whether SPHK1 and HSP27 work independently or are dependent on some other regulator after 625 nm light-emitting diode irradiation in the human keratinocyte (HaCaT) cell line. Methods: Differentially expressed genes (DEGs) were identified between groups with or without 625 nm photobiomodulation (PBM) in the inflammatory model. Potential transcription factors (TFs) of key DEGs were predicted using the iRegulon plugin. The mechanism was investigated by analyzing mRNA and protein expression levels, prostaglandin E2 levels, and intracellular reactive oxygen species (ROS) in phorbol 12-myristate 13-acetate (PMA)-induced HaCaT cells after 625 nm PBM. Results: A total of 6 TFs (e.g., E2F1) and 51 key DEGs (e.g., SPHK1) were identified after 625 nm PBM in PMA-stimulated HaCaT cells. E2F1 worked as a regulator of SPHK1; however, it did not affect HSP27. E2F1 knockdown drastically decreased the SPHK1 expression level and increased the intracellular ROS, as well as the expression levels of inflammation-related proteins in PMA-induced HaCaT cells. In addition, the inhibition of HSP27 decreased the anti-inflammatory effect of 625 nm PBM. Conclusions: E2F1 worked as a TF of SPHK1 and exhibited anti-inflammatory and antioxidative effects through SPHK1 in PMA-induced HaCaT cells after 625 nm PBM. HSP27 is essential for the 625 nm PBM-induced anti-inflammatory function. Therefore, E2F1/SPHK1 and HSP27 could be used as potential biomarkers for anti-inflammatory therapy with 625 nm PBM.
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Affiliation(s)
- Qiaochu Sun
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea.,Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian, China
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Yuzhu He
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea.,Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian, China
| | - Wonbong Lim
- Department of Premedical Science, College of Medicine, Chosun University, Gwangju, Korea
| | - Guowu Ma
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian, China
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Young Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea
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12
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Cho H, Kim B, Kim OS, Kim Y, Yang Y, Song J, Liu D, Jeon S, Kim O. Photochemical reaction to increase melanogenesis using Buddleja officinalis and blue light-emitting diode irradiation in B16F10. Photodiagnosis Photodyn Ther 2021; 35:102456. [PMID: 34311092 DOI: 10.1016/j.pdpdt.2021.102456] [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: 05/04/2021] [Revised: 07/08/2021] [Accepted: 07/20/2021] [Indexed: 10/20/2022]
Abstract
Recently, the incidence of vitiligo has increased because of stresses induced by external environment. Ultraviolet (UV) light therapy is the most commonly used method of treating the disease; however, UV light therapy requires a long treatment period, and prolonged exposure to UV radiation has side effects. The purpose of the present study was to investigate the effects of natural products and LED irradiation (LED-IR) on the synthesis of melanin. It was not possible to effectively increase intracellular melanin production through individual applications of Buddleja officinalis (BO), which is a natural substance selected through screening, or blue light irradiation (Blue-IR). However, when used in combination, these two agents stimulated adenylyl cyclase (AC) and melanin production was induced in the stimulated cells via the CREB/MITF/TYR pathway. Furthermore, the combined treatment with BO and Blue-IR generated low levels of cellular reactive oxygen species (ROS) and induced p38 phosphorylation, which in turn activated MITF in ROS-stimulated synthetic melanocytes, resulting in the promotion of melanogenic pathways other than the CREB/MITF/TYR pathway. In addition, this treatment combination effected melanin transport. These results suggested that the combined therapies can be used to treat melanin-deficiency skin diseases such as vitiligo.
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Affiliation(s)
- Hyejoung Cho
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Byunggook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Young Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Ying Yang
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Jianan Song
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Danyang Liu
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Sangmi Jeon
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea
| | - Okjoon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, South Korea.
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13
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Lee SY, Moon JS, Yang DW, Yoo HI, Jung JY, Kim OS, Kim MS, Koh JT, Chung HJ, Kim SH. SLPI in periodontal Ligament is not sleepy during biophysical force-induced tooth movement. J Clin Periodontol 2021; 48:528-540. [PMID: 33370451 DOI: 10.1111/jcpe.13416] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/09/2020] [Accepted: 12/23/2020] [Indexed: 12/14/2022]
Abstract
AIM We aimed to identify a key molecule that maintains periodontal tissue homeostasis during biophysical force-induced tooth movement (BTM) by orchestrating alveolar bone (AB) remodelling. MATERIALS AND METHODS Differential display-PCR was performed to identify key molecules for BTM in rats. To investigate the localization and expression of the identified molecules, immunofluorescence, real-time RT-PCR and Western blotting were performed in rats and human periodontal ligament (PDL) cells. Functional test and micro-CT analysis were performed to examine the in vivo effects of the identified molecules on BTM. RESULTS Secretory leucocyte peptidase inhibitor (SLPI) in the PDL was revealed as a key molecule for BTM-induced AB remodelling. SLPI was enhanced in the PDL under both compression and tension, and downregulated by an adenyl cyclases inhibitor. SLPI induced osteoblastogenic genes including runt-related transcription factor 2 (Runx2) and synergistically augmented tension-induced Runx2 expression. SLPI augmented mineralization in PDL cells. SLPI induced osteoclastogenic genes including receptor activator of nuclear factor kappa-Β ligand (RANKL) and synergistically augmented the compression-induced RANKL and macrophage colony-stimulating factor (MCSF) expression. Finally, the in vivo SLPI application into the AB significantly augmented BTM. CONCLUSIONS SLPI or its inhibitors might serve as a biological target molecule for therapeutic interventions to modulate BTM.
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Affiliation(s)
- Su-Young Lee
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jung-Sun Moon
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Dong-Wook Yang
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Hong-Il Yoo
- Department of Anatomy and Neuroscience, College of Medicine, Eulji University, Daejeon, Korea
| | - Ji-Yeon Jung
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Ok-Su Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Min-Seok Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Jeong-Tae Koh
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Hyun-Ju Chung
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Dental Science Research Institute, School of Dentistry, Chonnam National University, Gwangju, Korea
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14
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Park SH, Kim OJ, Chung HJ, Kim OS. Effect of a Er, Cr:YSGG laser and a Er:YAG laser treatment on oral biofilm-contaminated titanium. J Appl Oral Sci 2020; 28:e20200528. [PMID: 33263649 PMCID: PMC7714262 DOI: 10.1590/1678-7757-2020-0528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 07/09/2020] [Accepted: 08/31/2020] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Implant surface decontamination is a challenging procedure for therapy of peri-implant disease. This study aimed to compare the effectiveness of decontamination on oral biofilm-contaminated titanium surfaces in Er:YAG laser, Er, Cr:YSGG laser, and plastic curette. METHODOLOGY For oral biofilms formation, six participants wore an acrylic splint with eight titanium discs in the maxillary arch for 72 hours. A total of 48 contaminated discs were distributed among four groups: untreated control; decontamination with plastic curettes; Er, Cr:YSGG laser; and Er:YAG laser irradiation. Complete plaque removal was estimated using naked-eye and the time taken was recorded; the residual plaque area was measured and the morphological alteration of the specimen surface was observed by scanning electron microscopy. The total bacterial load and the viability of adherent bacteria were quantified by live or dead cell labeling with fluorescence microscopy. RESULTS The mean treatment time significantly decreased based on the treatment used in the following order: Er:YAG, Er, Cr:YSGG laser, and plastic curettes (234.9±25.4 sec, 156.1±12.7 sec, and 126.4±18.6 sec, P=0.000). The mean RPA in the Er, Cr:YSGG laser group (7.0±2.5%) was lower than Er:YAG and plastic curettes groups (10.3±2.4%, 12.3±3.6%, p=0.023). The viable bacteria on the titanium surface after Er, Cr:YSGG laser irradiation was significantly lower compared to the decontamination with plastic curette (P=0.05) but it was not significantly different from the Er:YAG laser irradiation. CONCLUSION We found that Er:YAG laser and Er, Cr:YSGG laser irradiation were effective methods for decontaminations without surface alterations.
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Affiliation(s)
- So-Hyun Park
- Chonnam National University, School of Dentistry, Dental Science Research Institute, Department of Periodontology, Gwangju, Republic of Korea
| | - Ok-Joon Kim
- Department of Oral Pathology, National University, School of Dentistry Chonnam, Gwangju, Republic of Korea
| | - Hyun-Ju Chung
- Chonnam National University, School of Dentistry, Dental Science Research Institute, Department of Periodontology, Gwangju, Republic of Korea
| | - Ok-Su Kim
- Chonnam National University, School of Dentistry, Hard-tissue Biointerface Research Center, Department of Periodontology, Gwangju, Republic of Korea
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15
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Zang Y, Song JH, Oh SH, Kim JW, Lee MN, Piao X, Yang JW, Kim OS, Kim TS, Kim SH, Koh JT. Targeting NLRP3 Inflammasome Reduces Age-Related Experimental Alveolar Bone Loss. J Dent Res 2020; 99:1287-1295. [PMID: 32531176 DOI: 10.1177/0022034520933533] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The cause of chronic inflammatory periodontitis, which leads to the destruction of periodontal ligament and alveolar bone, is multifactorial. An increasing number of studies have shown the clinical significance of NLRP3-mediated low-grade inflammation in degenerative disorders, but its causal linkage to age-related periodontitis has not yet been elucidated. In this study, we investigated the involvement of the NLRP3 inflammasome and the therapeutic potential of NLRP3 inhibition in age-related alveolar bone loss by using in vivo and in vitro models. The poor quality of alveolar bones in aged mice was correlated with caspase-1 activation by macrophages and elevated levels of IL-1β, which are mainly regulated by the NLRP3 inflammasome, in periodontal ligament and serum, respectively. Aged mice lacking Nlrp3 showed better bone mass than age-matched wild-type mice via a way that affects bone resorption rather than bone formation. In line with this finding, treatment with MCC950, a potent inhibitor of the NLRP3 inflammasome, significantly suppressed alveolar bone loss with reduced caspase-1 activation in aged mice but not in young mice. In addition, our in vitro studies showed that the addition of IL-1β encourages RANKL-induced osteoclastogenesis from bone marrow-derived macrophages and that treatment with MCC950 significantly suppresses osteoclastic differentiation directly, irrelevant to the inhibition of IL-1β production. Our results suggest that the NLRP3 inflammasome is a critical mediator in age-related alveolar bone loss and that targeting the NLRP3 inflammasome could be a novel option for controlling periodontal degenerative changes with age.
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Affiliation(s)
- Y Zang
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - J H Song
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - S H Oh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - J W Kim
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - M N Lee
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - X Piao
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - J W Yang
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - O S Kim
- Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - T S Kim
- Department of Life Sciences, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - S H Kim
- Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - J T Koh
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea.,Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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He Y, Kim BG, Kim HE, Sun Q, Shi S, Ma G, Kim Y, Kim OS, Kim OJ. The Protective Role of Feruloylserotonin in LPS-Induced HaCaT Cells. Molecules 2019; 24:molecules24173064. [PMID: 31443581 PMCID: PMC6749254 DOI: 10.3390/molecules24173064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 12/20/2022] Open
Abstract
Epidermal inflammation is caused by various bacterial infectious diseases that impair the skin health. Feruloylserotonin (FS) belongs to the hydroxycinnamic acid amides of serotonin, which mainly exists in safflower seeds and has been proven to have anti-inflammatory and antioxidant activities. Human epidermis mainly comprises keratinocytes whose inflammation causes skin problems. This study investigated the protective effects of FS on the keratinocyte with lipopolysaccharides (LPS)-induced human HaCaT cells and elucidated its underlying mechanisms of action. The mechanism was investigated by analyzing cell viability, PGE2 levels, cell apoptosis, nuclear factor erythroid 2-related factor 2 (Nrf2) translocation, and TLR4/NF-κB pathway. The anti-inflammatory effects of FS were assessed by inhibiting the inflammation via down-regulating the TLR4/NF-κB pathway. Additionally, FS promoted Nrf2 translocation to the nucleus, indicating that FS showed anti-oxidative activities. Furthermore, the antioxidative and anti-inflammatory effects of FS were found to benefit each other, but were independent. Thus, FS can be used as a component to manage epidermal inflammation due to its anti-inflammatory and anti-oxidative properties.
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Affiliation(s)
- Yuzhu He
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China
| | - Byung-Gook Kim
- Department of Oral Medicine, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Hye-Eun Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Qiaochu Sun
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China
| | - Shuhan Shi
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China
| | - Guowu Ma
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Dalian 116044, China
| | - Young Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea
| | - Ok-Joon Kim
- Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Korea.
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17
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Shet U, Oh HK, Chung HJ, Kim YJ, Kim OS, Lim HJ, Shin MH, Lee SW. Humoral immune responses to periodontal pathogens in the elderly. J Periodontal Implant Sci 2015; 45:178-83. [PMID: 26550526 PMCID: PMC4635439 DOI: 10.5051/jpis.2015.45.5.178] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/15/2015] [Indexed: 12/17/2022] Open
Abstract
PURPOSE Elderly people are thought to be more susceptible to periodontal disease due to reduced immune function associated with aging. However, little information is available on the nature of immune responses against putative periodontal pathogens in geriatric patients. The purpose of this study was to evaluate the serum IgG antibody responses to six periodontal pathogens in geriatric subjects. METHODS The study population consisted of 85 geriatric patients and was divided into three groups: 29 mild (MCP), 27 moderate (MoCP) and 29 severe (SCP) chronic periodontitis patients. Serum levels of IgG antibody to Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum and Prevotella intermedia were measured by enzyme-linked immunosorbent assay (ELISA) and compared among the groups. RESULTS All three groups showed levels of serum IgG in response to P. gingivalis, A. actinomycetemcomitans, and P. intermedia that were three to four times higher than levels of IgG to T. forsythia, T. denticola, and F. nucleatum. There were no significant differences among all three groups in IgG response to P. gingivalis (P=0.065), T. forsythia (P=0.057), T. denticola (P=0.1), and P. intermedia (P=0.167), although the IgG levels tended to be higher in patients with SCP than in those with MCP or MoCP (with the exception of those for P. intermedia). In contrast, there were significant differences among the groups in IgG levels in response to F. nucleatum (P=0.001) and A. actinomycetemcomitans (P=0.003). IgG levels to A. actinomycetemcomitans were higher in patients with MCP than in those with MoCP or SCP. CONCLUSIONS When IgG levels were compared among three periodontal disease groups, only IgG levels to F. nucleatum significantly increased with the severity of disease. On the contrary, IgG levels to A. actinomycetemcomitans decreased significantly in patients with SCP compared to those with MCP. There were no significant differences in the IgG levels for P. gingivalis, T. forsythia, T. denticola, and P. intermedia among geriatric patients with chronic periodontitis.
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Affiliation(s)
- Uttom Shet
- Department of Oral & Maxillofacial Surgery, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Hee-Kyun Oh
- Department of Oral & Maxillofacial Surgery, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Hyun-Ju Chung
- Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Young-Joon Kim
- Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Ok-Su Kim
- Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Hoi-Jeong Lim
- Department of Orthodontics, Chonnam National University School of Dentistry, Gwangju, Korea
| | - Min-Ho Shin
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Seok-Woo Lee
- Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea. ; Department of Dental Education, Dental Science Research Institute, Chonnam National University School of Dentistry, Gwangju, Korea
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18
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Lee JS, Kim OS, Chung HJ, Kim YJ, Kweon SS, Lee YH, Shin MH, Yoon SJ. The correlation of carotid artery calcification on panoramic radiographs and determination of carotid artery atherosclerosis with ultrasonography. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 118:739-45. [DOI: 10.1016/j.oooo.2014.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/26/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
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Tak IH, Shin MH, Kweon SS, Nam HS, Cauley JA, Kim OJ, Kim YJ, Chung HJ, Kim OS. The association between periodontal disease, tooth loss and bone mineral density in a Korean population. J Clin Periodontol 2014; 41:1139-44. [PMID: 25207848 DOI: 10.1111/jcpe.12309] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2014] [Indexed: 11/27/2022]
Abstract
OBJECTIVE We aimed to evaluate whether clinical attachment loss (CAL), a measure of the severity of periodontal disease or number of teeth present is associated with bone mineral density (BMD). METHODS The study population consisted of 5383 people aged 50 years and older who participated in the Dong-gu Study. BMD at the lumbar spine and femoral neck was measured by dual-energy X-ray absorptiometry. Oral examination included assessments of the number of teeth present and CAL. Number of teeth present was categorized into three equal categories. CAL values were divided into tertiles in terms of the percentage of sites with CAL ≥4 mm. Analysis of covariance was used to compare the adjusted means of BMD according to the tooth number and the tertiles of CAL. RESULTS There was a significant association between the number of teeth present and BMD in men. Compared with men with 22 or more teeth, men with 10 and less teeth had lower BMD. CAL was significantly associated with lower BMD at the lumbar spine in women. CONCLUSION Our data indicate that tooth loss and CAL were associated with low BMD. However, the magnitude of these associations was relatively small and the clinical significance was unclear.
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Affiliation(s)
- In-Hye Tak
- Department of Periodontology, School of Dentistry, Dental Science Institute, Chonnam National University, Gwangju, South Korea
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Kim OS, Shin MH, Song IH, Lim IG, Yoon SJ, Kim OJ, Lee YH, Kim YJ, Chung HJ. Digital panoramic radiographs are useful for diagnosis of osteoporosis in Korean postmenopausal women. Gerodontology 2014; 33:185-92. [PMID: 24913816 DOI: 10.1111/ger.12134] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2014] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The purpose of this study was to determine whether digital panoramic radiographs could be used for the diagnosis of osteoporosis through evaluation of the radiographs based on the correlation with bone mineral density (BMD). METHODS One hundred and ninety-four post-menopausal women were selected from participants who had participated in the Dong-gu study. Panoramic radiographic indices measured are mental index (MI), mandibular cortical index (MCI) and simple visual estimation (SVE). BMD at the lumbar spine and proximal femur was measured by dual-energy X-ray absorptiometry (DXA). The Pearson's correlation test was performed to analyse the correlation between MI and age and BMD at the lumbar spine, femoral neck and total hip. Multiple linear regression analysis was performed to analyse the association of MI, MCI and SVE with BMD after adjusting for age, height and weight. To determine the optimal cut-off point of MI for the diagnosis of osteoporosis, the receiver operating characteristic analysis was performed. RESULTS The MI was positively correlated with BMDs: lumbar spine: r = 0.36, femoral neck: r = 0.59 and total hip: r = 0.58 (p < 0.001). As age increased, MI decreased (r = -0.46). BMD at the lumbar spine and total hip were significantly lower in participants with reduction of mandibular width, thinning and resorption of mandibular cortex by the MI, SVE and MCI, respectively. The optimal cut-off value of MI for the diagnosis of spinal osteoporosis was 2.22 mm. CONCLUSION Thickness and morphological changes of mandibular inferior cortical bone are associated with BMD, independent of age, height and weight. These results suggest that MI, MCI and SVE may be useful indices for the diagnosis of osteoporosis in a Korean population.
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Affiliation(s)
- Ok-Su Kim
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Min-Ho Shin
- Department of Preventive Medicine, Chonnam National University, Medical School, Hak1dong, Donggu, Gwangju, Korea
| | - In-Hwa Song
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Il-Gu Lim
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Suk-Ja Yoon
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnnam National University, Gwangju, Korea
| | - Ok-Joon Kim
- Department of Oral Pathology, School of Dentistry, Dental Science Research Institute, Chonnnam National University, Gwangju, Korea
| | - Young-Hoon Lee
- Department of Preventive Medicine and Institute of Wonkwang Medical Science, Wonkwang University College of Medicine, Iksan, Korea
| | - Young-Joon Kim
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Hyun-Ju Chung
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
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Jung YS, Shin MH, Kweon SS, Lee YH, Kim OJ, Kim YJ, Chung HJ, Kim OS. Periodontal disease associated with blood glucose levels in urban Koreans aged 50 years and older: the Dong-gu study. Gerodontology 2014; 32:267-73. [PMID: 24428748 DOI: 10.1111/ger.12107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 11/19/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate the association of periodontal disease and the number of teeth present with the risk of prediabetes and diabetes as well as with blood glucose and HbA1c levels in adult Koreans. BACKGROUND The relationship between periodontal disease and diabetes has not been fully elucidated. MATERIALS AND METHODS Cross-sectional data from 5535 participants aged ≥50 years were obtained from 2008 to 2010. Periodontal status was measured as pocket depth (PD), clinical attachment loss (CAL) and bleeding on probing (BOP) recorded. The percentage of sites with a PD ≥4 mm, CAL ≥4 mm (CAL4) and BOP (BOP%) were recorded. Participants were divided into three groups according to PD4, CAL4 and BOP% measurements. Number of teeth present was divided into four groups. Participants were classified as normoglycaemic, prediabetic or diabetic based on HbA1c and fasting glucose levels. RESULTS After full adjustment, the highest tertile of CAL4 (OR: 1.47, 95% CI: 1.18-2.02, p < 0.001), PD4 (OR: 1.58, 95% CI: 1.26-1.97, p < 0.001) and BOP% (OR: 1.37, 95% CI: 1.07-1.75, p = 0.012) had significantly increased odds of diabetes. The number of teeth present was inversely related to diabetes (p < 0.001) and prediabetes (p = 0.032) risk. Periodontal disease severity was positively associated with HbA1c and glucose levels. The number of teeth present was positively associated with HbA1c, but not glucose, levels. CONCLUSION Periodontal disease and the number of teeth present are associated with an increased risk of diabetes and increased blood glucose and HbA1c levels in Koreans aged ≥50 years.
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Affiliation(s)
- Young-Suk Jung
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Min-Ho Shin
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, South Korea
| | - Sun-Seog Kweon
- Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, South Korea.,Jeonnam Regional Cancer Center, Chonnam National University Hwasun Hospital, Hwasun, South Korea
| | - Young-Hoon Lee
- Department of Preventive Medicine, Wonkwang University College of Medicine, Iksan, South Korea
| | - Ok-Joon Kim
- Department of Oral Pathology, School of Dentistry, Dental Science Institute, Chonnam National University, Gwangju, South Korea
| | - Young-Joon Kim
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Hyun-Ju Chung
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
| | - Ok-Su Kim
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
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Jung YS, Shin MH, Kim IS, Kweon SS, Lee YH, Kim OJ, Kim YJ, Chung HJ, Kim OS. Relationship between periodontal disease and subclinical atherosclerosis: the Dong-gu study. J Clin Periodontol 2013; 41:262-8. [PMID: 24256094 DOI: 10.1111/jcpe.12204] [Citation(s) in RCA: 14] [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: 11/17/2013] [Indexed: 12/01/2022]
Abstract
AIM We assessed the association of periodontal disease and number of missing teeth with subclinical atherosclerosis in an adult Korean population. MATERIALS AND METHODS Cross-sectional data from 5404 individuals aged ≥50 years were obtained from the 2008-2010 Dong-gu study. Periodontal examinations were conducted to determine the number of missing teeth, pocket depth (PD), clinical attachment loss (CAL), and bleeding on probing (BOP). The percentages of sites with PD ≥ 4 mm (PD 4%), CAL ≥ 4 mm (CAL 4%), and BOP (BOP%) were recorded for each participant. B-mode ultrasound was performed to determine common carotid artery intima-media thickness (CCA IMT) and the presence of carotid plaques. Multivariate linear regression models were used to assess the associations between periodontal parameters and CCA IMT and carotid plaque. RESULTS Number of missing teeth was associated with increased CCA IMT, and BOP% was associated with increased CCA IMT in females only. This association was robust in never smokers. CONCLUSIONS The number of missing teeth was associated with CCA IMT, and BOP% was associated with CCA IMT in females only. These associations were robust in never smokers. Our results suggest that tooth loss due to oral disease may play a role in subclinical carotid atherosclerosis.
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Affiliation(s)
- Young-Suk Jung
- Department of Periodontology, School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, South Korea
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Kim S, Kim J, Lim W, Jeon S, Kim O, Koh JT, Kim CS, Choi H, Kim O. In vitro bactericidal effects of 625, 525, and 425 nm wavelength (red, green, and blue) light-emitting diode irradiation. Photomed Laser Surg 2013; 31:554-62. [PMID: 24138193 DOI: 10.1089/pho.2012.3343] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVE The purpose of this study was to evaluate the relationship of 625, 525, and 425 nm wavelengths, providing average power output and effects on three common pathogenic bacteria. BACKGROUND DATA Ultraviolet (UV) light kills bacteria, but the bactericidal effects of UV may not be unique, as 425 nm produces a similar effect. The bactericidal effects of light-emitting diode (LED) wavelengths such as 625 and 525 nm have not been described. Before conducting clinical trials, the appropriate wavelength with reasonable dose and exposure time should be established. MATERIALS AND METHODS The bactericidal effects of 625, 525, and 425 nm wavelength LED irradiation were investigated in vitro for the anaerobic bacterium Porphyromonas gingivalis and two aerobes (Staphylococcus aureus and Escherichia coli DH5α). Average power output was 6 mW/cm(2) for 1 h. The bacteria were exposed to LED irradiation for 1, 2, 4, and 8 h (21.6, 43.2, 86.4, and 172.8 J/cm(2), respectively). LED irradiation was performed during growth on agar and in broth. Control bacteria were incubated without LED irradiation. Bacterial growth was expressed in colony-forming units (CFU) and at an optical density at 600 nm in agar and broth. RESULTS The bactericidal effect of LED phototherapy depended upon wavelength, power density, bacterial viable number, and bacteria species. The bactericidal effect of 425 and 525 nm irradiation varied depending upon the bacterial inoculation, compared with unirradiated samples and samples irradiated with red light. Especially, P. gingivalis and E. coli DH5α were killed by 425 nm, and S. aureus growth was inhibited by 525 nm. However, the wavelength of 625 nm was not bactericidal for P. gingivalis, E. coli DH5α, or S. aureus. CONCLUSIONS Irradiation at 625 nm light was not bactericidal to S. aureus, E. coli, and P. gingivalis, whereas wavelengths of 425 and 525 nm had bactericidal effects. S. aureus was also killed at 525 nm.
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Affiliation(s)
- SangWoo Kim
- 1 Department of Oral Pathology, Medical Research Center for Biomineralization Disorders, School of Dentistry, Dental Science Research Institute, Chonnam National University , Bug-Gu, Gwangju, Republic of Korea
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Shet UK, Oh HK, Kim HJ, Chung HJ, Kim YJ, Kim OS, Choi HR, Kim OJ, Lim HJ, Lee SW. Quantitative analysis of periodontal pathogens present in the saliva of geriatric subjects. J Periodontal Implant Sci 2013; 43:183-90. [PMID: 24040571 PMCID: PMC3769597 DOI: 10.5051/jpis.2013.43.4.183] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 08/07/2013] [Indexed: 11/08/2022] Open
Abstract
PURPOSE At present, information regarding periodontal disease in geriatric patients is scarce. The purpose of this study was to quantify the periodontal pathogens present in the saliva of Korean geriatric patients and assess the relationship between the bacterial levels and the periodontal condition. METHODS Six putative periodontal pathogens were quantified by using a real-time polymerase chain reaction assay in geriatric patient groups (>60 years) with mild chronic periodontitis (MCP), moderate chronic periodontitis (MoCP), and severe chronic periodontitis (SCP). The copy numbers of Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum, and Prevotella intermedia were measured. RESULTS It was found that the bacterial copy numbers increased as the severity of the disease increased from MCP to SCP, except for P. intermedia. For P. intermedia, it was found that samples in the MCP group yielded the largest amount. It was also found that the quantities of P. gingivalis, T. forsythia, and T. denticola, the so-called "red complex" bacteria, were lower than those of F. nucleatum, A. actinomycetemcomitans, and P. intermedia in all of the samples. CONCLUSIONS Collectively, the results of this study suggest that the levels of P. gingivalis, T. forsythia, F. nucleatum, and T. denticola present in saliva are associated with the severity of periodontal disease in geriatric patients.
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Affiliation(s)
- Uttom K Shet
- Department of Oral & Maxillofacial Surgery, Dental Science Research Institute, Chonnam National University School of Dentistry, Gwangju, Korea
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Lee BA, Kang CH, Vang MS, Jung YS, Piao XH, Kim OS, Chung HJ, Kim YJ. Surface characteristics and osteoblastic cell response of alkali-and heat-treated titanium-8tantalum-3niobium alloy. J Periodontal Implant Sci 2012; 42:248-55. [PMID: 23346470 PMCID: PMC3543942 DOI: 10.5051/jpis.2012.42.6.248] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 11/13/2012] [Indexed: 12/02/2022] Open
Abstract
Purpose The aim of the present study was to evaluate the biological response of alkali- and heat-treated titanium-8tantalum-3niobium surfaces by cell proliferation and alkaline phosphatase (ALP) activity analysis. Methods Commercial pure titanium (group cp-Ti) and alkali- and heat-treated titanium-8tantalum-3niobium (group AHT) disks were prepared. The surface properties were evaluated using scanning electron microscopy, energy dispersed spectroscopy and X-ray photoelectron spectroscopy (XPS). The surface roughness was evaluated by atomic force microscopy and a profilometer. The contact angle and surface energy were also analyzed. The biological response of fetal rat calvarial cells on group AHT was assessed by cell proliferation and ALP activity. Results Group AHT showed a flake-like morphology microprofile and dense structure. XPS analysis of group AHT showed an increased amount of oxygen in the basic hydroxyl residue of titanium hydroxide groups compared with group cp-Ti. The surface roughness (Ra) measured by a profilometer showed no significant difference (P>0.05). Group AHT showed a lower contact angle and higher surface energy than group cp-Ti. Cell proliferation on group AHT surfaces was significantly higher than on group cp-Ti surfaces (P<0.05). In comparison to group cp-Ti, group AHT enhanced ALP activity (P<0.05). Conclusions These results suggest that group AHT stimulates osteoblast differentiation.
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Affiliation(s)
- Bo-Ah Lee
- Department of Periodontology, Dental Research Institute, Chonnam National University School of Dentistry, Gwangju, Korea
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Lee BA, Lee HS, Jung YS, Kim SW, Lee YW, Chang SH, Chung HJ, Kim OS, Kim YJ. The effects of a novel botanical agent on lipopolysaccharide-induced alveolar bone loss in rats. J Periodontol 2012; 84:1221-9. [PMID: 23106504 DOI: 10.1902/jop.2012.120460] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The development of host-modulatory agents with low risk of adverse effects has been needed to treat periodontitis, a chronic inflammatory disease. A botanical mixture of extracts from two natural substances, Panax notoginseng and Rehmannia glutinosa Libosch, was developed as a novel botanical agent synthesized with anti-inflammatory effect. The aim of this study is to evaluate the effects of the botanical mixture on the release of inflammatory cytokines and its inhibitory effect on lipopolysaccharide (LPS)-induced alveolar bone loss (ABL) in a rat model. METHODS Cytotoxicity was assessed by 3-(4,5-dimethylthiazol-2yl)-5(3-carboxymethoxyphenol)-2-(4-sulfophenyl)-2H-tetrazolium assay using human gingival fibroblast (hGF) and human periodontal ligament (hPDL) cells. Human acute monocytic leukemia cell line and hGF cells were cultured to assay tumor necrosis factor (TNF)-α and interleukin (IL)-6, respectively. Microcomputed tomography analysis and immunofluoresence analysis were performed to evaluate the efficacy of the botanical mixture to inhibit the destruction of alveolar bone and connective tissue in a rat model. RESULTS The botanical mixture is cytotoxic at concentrations exceeding 2.5 mg/mL (P <0.05). Based on the results from cytotoxicity assay, it can be determined that the pharmacologic ranges of the botanical mixture to be used in all subsequent in vitro and in vivo experiments. The botanical mixture reduced the release of TNF-α and IL-6 from human monocytic cells and hGF cells in a dose-dependent manner (P <0.05). The administration of the botanical mixture significantly reduced the alveolar bone loss in a rat model (P <0.05). In groups treated with the botanical mixture, matrix metalloproteinase (MMP)-9 was detected along the alveolar bone crest (ABC), but not around the gingival connective tissue, while in the group with LPS-induced ABL, pronounced expression of MMP-9 around the ABC, periodontal ligament, and gingival connective tissue was found. CONCLUSIONS The botanical mixture showed a potential adjunctive effect in the treatment of periodontitis. However, the present findings are obtained in vitro and in a rat model, so further clinical study is needed for its clinical application.
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Affiliation(s)
- Bo-Ah Lee
- Dental Research Institute, School of Dentistry, 2nd Stage of Brain Korea 21 Project for School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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Lee YJ, Cui DZ, Jeon HR, Chung HJ, Park YJ, Kim OS, Kim YJ. Surface characteristics of thermally treated titanium surfaces. J Periodontal Implant Sci 2012; 42:81-7. [PMID: 22803009 PMCID: PMC3394999 DOI: 10.5051/jpis.2012.42.3.81] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 05/13/2012] [Indexed: 11/25/2022] Open
Abstract
Purpose The characteristics of oxidized titanium (Ti) surfaces varied according to treatment conditions such as duration time and temperature. Thermal oxidation can change Ti surface characteristics, which affect many cellular responses such as cell adhesion, proliferation, and differentiation. Thus, this study was conducted to evaluate the surface characteristics and cell response of thermally treated Ti surfaces. Methods The samples were divided into 4 groups. Control: machined smooth titanium (Ti-S) was untreated. Group I: Ti-S was treated in a furnace at 300℃ for 30 minutes. Group II: Ti-S was treated at 500℃ for 30 minutes. Group III: Ti-S was treated at 750℃ for 30 minutes. A scanning electron microscope, atomic force microscope, and X-ray diffraction were used to assess surface characteristics and chemical composition. The water contact angle and surface energy were measured to assess physical properties. Results The titanium dioxide (TiO2) thickness increased as the treatment temperature increased. Additional peaks belonging to rutile TiO2 were only found in group III. The contact angle in group III was significantly lower than any of the other groups. The surface energy significantly increased as the treatment temperature increased, especially in group III. In the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, after 24 hours of incubation, the assessment of cell viability showed that the optical density of the control had a higher tendency than any other group, but there was no significant difference. However, the alkaline phosphatase activity increased as the temperature increased, especially in group III. Conclusions Consequently, the surface characteristics and biocompatibility increased as the temperature increased. This indicates that surface modification by thermal treatment could be another useful method for medical and dental implants.
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Affiliation(s)
- Yang-Jin Lee
- Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry, Gwangju, Korea
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Kim OS, Uhm SW, Kim SC, Lee BA, Kim OJ, Kim YJ, Chung HJ. A Case of Squamous Cell Carcinoma Presenting as Localized Severe Periodontitis in the Maxillary Gingiva. J Periodontol 2012; 83:753-6. [DOI: 10.1902/jop.2011.110465] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lim W, Kim O, Jung J, Ko Y, Ha J, Oh H, Lim H, Kwon H, Kim I, Kim J, Kim M, Kim S, Kim BK, Kim S, Kang BC, Choi H, Kim O. Dichloromethane fraction from Gardenia jasminoides: DNA topoisomerase 1 inhibition and oral cancer cell death induction. Pharm Biol 2010; 48:1354-1360. [PMID: 20738175 DOI: 10.3109/13880209.2010.483246] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
CONTEXT A growing body of evidence shows that compounds of plant origin have the ability to prevent cancer. The fruit of gardenia, Gardenia jasminoides Ellis (Rubiaceae), has long been used as a food additive and herbal medicine, and its pharmacological actions, such as protective activity against oxidative damage, cytotoxic effect, and anti-inflammatory and anti-tumor activity, have already been reported. OBJECTIVE The purpose of the present study was to investigate the presence of DNA topoisomerase 1 inhibitor in various solvent fractions of Gardenia extract and examine the induction of oral cancer cell death upon treatment with Gardenia extract. MATERIALS AND METHODS The methanol extract of Gardenia was partitioned with n-hexane, dichloromethane, ethyl acetate, n-butanol, and water. RESULTS In the DNA topoisomerase 1 assay, n-hexane and dichloromethane fractions inhibited topoisomerase 1 and led to a decrease in the cell viability of KB cells. The dichloromethane fraction (0.1 mg/mL) also showed 77% inhibition of cell viability in KB cells compared with HaCaT cells. Treatment with dichloromethane fraction led to apoptotic cell death as evidenced by flow cytometric analysis and morphological changes. In addition, treatment with Gardenia extract dichloromethane fraction led to the partial increase of caspase-3, caspase-8 and caspase-9 activities and the cleavage of poly (ADP-ribose) polymerase. CONCLUSION Taken together, these results suggest that the dichloromethane fraction from Gardenia extract induces apoptotic cell death by DNA topoisomerase 1 inhibition in KB cells. These findings suggest the possibility that Gardenia extract could be developed as an anticancer modality.
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Affiliation(s)
- WonBong Lim
- Second Stage of Brain Korea 21 for School of Dentistry, Dental Science Research Institute, Chonnam National University, Bug-Gu, Gwangju, Korea
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Kim SC, Kim OS, Kim OJ, Kim YJ, Chung HJ. Antioxidant profile of whole saliva after scaling and root planing in periodontal disease. J Periodontal Implant Sci 2010; 40:164-71. [PMID: 20827325 PMCID: PMC2931304 DOI: 10.5051/jpis.2010.40.4.164] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 07/01/2010] [Indexed: 11/08/2022] Open
Abstract
PURPOSE This study compared the total antioxidant status (TAS) and superoxide dismutase (SOD) activity in the saliva of periodontally compromised patients before and after scaling and root planing (SRP) to assess their diagnostic utility. METHODS Severe chronic periodontitis patient (test group) and subjects with no attachment loss, sites showing a 3 mm or more probing depth and a sulcus bleeding index < 10% (control group) were enrolled in this study. Saliva sampling and clinical examination were performed at one week, one month and 3 months after SRP. The TAS and SOD activity in each patient's saliva was measured for the comparative analysis between the groups. RESULTS In the test group, the TAS decreased directly after SRP. With time, it increased slightly and was relatively unchanged compared to the baseline. In the control group, the TAS also decreased immediately after SRP but increased gradually with time until 3 months. The SOD activity in the test and control subjects decreased immediately after SRP until 1 month. At 3 months, the SOD activity had increased. Both groups had a similar profile of SOD activity. However, the SOD activity of the control group was significantly higher than that of the test group at each point in time (P < 0.05). CONCLUSIONS There was a significant difference in the total salivary antioxidant level between the periodontitis and healthy or gingivitis (control) group during the experiment period. The total antioxidant level in the saliva was higher in the patients with severe chronic periodontitis than the healthy or gingivitis control before SRP. The SOD activity of the periodontitis patients was lower than the control at each time point. These findings conclusively reveal the possible use of saliva as a diagnostic tool for periodontal health.
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Affiliation(s)
- Sang-Chul Kim
- Department of Periodontology, Chonnam National University School of Dentistry, Gwangju, Korea
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Kwon H, Lim W, Choi Y, Nam J, Han C, Kim J, Ko Y, Kim I, Kim S, Kim M, Kim O, Choi H, Kim O. High-grade oncocytic mucoepidermoid carcinoma of the minor salivary gland origin: a case report with immunohistochemical study. ACTA ACUST UNITED AC 2010; 109:e72-7. [PMID: 20451836 DOI: 10.1016/j.tripleo.2010.01.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 12/30/2009] [Accepted: 01/26/2010] [Indexed: 11/26/2022]
Abstract
An oncocytic mucoepidermoid carcinoma arising from the minor salivary gland origin is extremely rare. We report on a 44-year-old man with a high-grade oncocytic mucoepidermoid carcinoma originating in the minor salivary gland of the posterior mandible. All tumor cells showed the expected pattern of immunoreactivity, with positive results for the antimitochondrial antibody and p63, and negative results for the androgenic receptor antibody. Microscopically, the tumor was considered to be a high-grade carcinoma in the grading systems of the Armed Forces Institute of Pathology and Brandwein. The patient underwent a partial mandibulectomy, and the lesion was reconstructed with a right fibula osteofasciocutaneous flap under general anesthesia. The patient is currently under long-term follow-up.
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Affiliation(s)
- HyukIl Kwon
- School of Dentistry, Dental Science Research Institute, Chonnam National University, Gwangju, Korea
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Kim JH, Cho KP, Chung YS, Kim OS, Chung SS, Lee KK, Lee DJ, Lee KM, Kim YJ. The effect of nanotubular titanium surfaces on osteoblast differentiation. J Nanosci Nanotechnol 2010; 10:3581-3585. [PMID: 20359004 DOI: 10.1166/jnn.2010.2235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The biological response of fetal rat calvarial cells on a TiO2 nanotubular surface (Ti-NT) was evaluated by cell viability assay, alkaline phosphatase (ALP) activity and reverse transcription polymerase chain reaction (RT-PCR) analysis. The cell viability assay showed no significant difference between the Ti-NT and smooth titanium surfaces (Ti-S). Ti-NT had better cellular responses with regard to the ALP activity and bone-associated markers, such as bone sialoprotein and osteocalcin mRNA than Ti-S. These results suggest that Ti-NT stimulate the differentiation into osteoblasts of fetal rat calvarial cells, potentially contributing to rapid osseointegration.
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Affiliation(s)
- Jae-Hyung Kim
- Dental Research Institute, School of Dentistry, 2nd Stage of Brain Korea 21 Project, Chonnam National University, Gwangju 500-757, Korea
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Jo CH, Kim OS, Park EY, Kim BJ, Lee JH, Kang SB, Lee JH, Han HS, Rhee SH, Yoon KS. Fetal mesenchymal stem cells derived from human umbilical cord sustain primitive characteristics during extensive expansion. Cell Tissue Res 2008; 334:423-33. [PMID: 18941782 DOI: 10.1007/s00441-008-0696-3] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2008] [Accepted: 09/11/2008] [Indexed: 12/15/2022]
Abstract
Stem cells of fetal origin lie between embryonic and adult stem cells in terms of potentiality. Because of the ethical controversy surrounding embryonic stem cells and the relatively inferior quality of adult stem cells, the use of fetal stem cells would be an attractive option in future therapeutic applications. Here, we have investigated primitive characteristics of human umbilical-cord-derived fetal mesenchymal stem cells (UC fMSCs) during extensive expansion. We have successfully isolated and cultured UC fMSCs from all UC samples, but with two early fungal contaminations. UC fMSCs proliferated without significant evidence of morphological changes, and the average cumulative population-doubling level was over 25 for about 3 months. UC fMSCs showed the positive expression of several CD markers, known to be related to MSCs, including CD73 (SH-3, 4), CD90 (Thy-1), CD105 (SH-2), CD117 (c-kit), and CD166 (ALCAM). They demonstrated primitive properties throughout the expansion period: multilineage differentiation potentials examined by functional assays, a variety of pluripotent stem cell markers including Nanog, Oct-4, Sox-2, Rex-1, SSEA-3, SSEA-4, Tra-1-60, and Tra-1-81, minimal evidence of senescence as shown by beta-galactosidase staining, and the consistent expression of telomerase activity. These results suggest that UC fMSCs have more primitive properties than adult MSCs, which might make them a useful source of MSCs for clinical applications.
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Affiliation(s)
- Chris H Jo
- Department of Orthopedic Surgery, Seoul Metropolitan Boramae Hospital, Seoul National University College of Medicine, 425 Shindaebang2-dong, Dongjak-gu, Seoul, 156-707, Korea
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Kang MS, Choi EK, Choi DH, Ryu SY, Lee HH, Kang HC, Koh JT, Kim OS, Hwang YC, Yoon SJ, Kim SM, Yang KH, Kang IC. Antibacterial activity of pyrrolidine dithiocarbamate. FEMS Microbiol Lett 2008; 280:250-4. [PMID: 18248425 DOI: 10.1111/j.1574-6968.2008.01069.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Pyrrolidine dithiocarbamate (PDTC), an antioxidant with a metal-chelating activity, has been used widely to inhibit the expression of inflammatory genes in vitro and in vivo. This study investigated whether PDTC has an antimicrobial activity against various bacteria. The antibacterial activity of PDTC and other compounds was evaluated in vitro by the broth microdilution method against Porphyromonas gingivalis, Actinobacillus actinomycetemcomitans, Staphylococcus aureus, and Escherichia coli. Bacterial growth was inhibited by PDTC, where a wide range of sensitivity was demonstrated among the tested bacteria. The antibacterial activity of PDTC was reduced by the addition of copper chloride; in contrast, it was enhanced considerably by zinc chloride. Two different zinc chelators, Ca-saturated EDTA (Ca-EDTA) and N,N,N',N'-tetrakis (2-pyridylmethyl) ethylenediamine, blocked the antibacterial activity of PDTC, whereas Zn-EDTA failed to reduce the activity of PDTC. These results demonstrate for the first time that PDTC possesses an antibacterial activity, for which zinc is required, and suggest that PDTC, possessing a dual anti-inflammatory and antibacterial activity, may be considered for topical use for inflammatory diseases of bacterial origin.
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Affiliation(s)
- Mi-Sun Kang
- Brain Korea 21 Program, Chonnam National University, Kwangju, South Korea
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Affiliation(s)
- Sang-Ho Cho
- Department of Periodontology, Chonnam National University, Korea
| | - Ok-Su Kim
- Department of Periodontology, Chonnam National University, Korea
- Dental Science Research Institute, Chonnam National University, Korea
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Seo EJ, Chung HJ, Kim YJ, Kim OS, Kim SH. Effect of mouthrinse containing Lipomyces starkeyi KSM 22 glucanhydrolase on plaque formation during a 4-day period. ACTA ACUST UNITED AC 2004. [DOI: 10.5051/jkape.2004.34.1.195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eun-Ju Seo
- Department of Periodontology, College of Dentistry and Dental Science Research Institute, Chonnam National University, Korea
| | - Hyun-Ju Chung
- Department of Periodontology, College of Dentistry and Dental Science Research Institute, Chonnam National University, Korea
| | - Young-Jun Kim
- Department of Periodontology, College of Dentistry and Dental Science Research Institute, Chonnam National University, Korea
| | - Ok-Su Kim
- Department of Periodontology, College of Dentistry and Dental Science Research Institute, Chonnam National University, Korea
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Bae YS, Sung JY, Kim OS, Kim YJ, Hur KC, Kazlauskas A, Rhee SG. Platelet-derived growth factor-induced H(2)O(2) production requires the activation of phosphatidylinositol 3-kinase. J Biol Chem 2000; 275:10527-31. [PMID: 10744745 DOI: 10.1074/jbc.275.14.10527] [Citation(s) in RCA: 260] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Autophosphorylation of the platelet-derived growth factor (PDGF) receptor triggers intracellular signaling cascades as a result of recruitment of Src homology 2 domain-containing enzymes, including phosphatidylinositol 3-kinase (PI3K), the GTPase-activating protein of Ras (GAP), the protein-tyrosine phosphatase SHP-2, and phospholipase C-gamma1 (PLC-gamma1), to specific phosphotyrosine residues. The roles of these various effectors in PDGF-induced generation of H(2)O(2) have now been investigated in HepG2 cells expressing various PDGF receptor mutants. These mutants included a kinase-deficient receptor and receptors in which various combinations of the tyrosine residues required for the binding of PI3K (Tyr(740) and Tyr(751)), GAP (Tyr(771)), SHP-2 (Tyr(1009)), or PLC-gamma1 (Tyr(1021)) were mutated to Phe. PDGF failed to increase H(2)O(2) production in cells expressing either the kinase-deficient mutant or a receptor in which the two Tyr residues required for the binding of PI3K were replaced by Phe. In contrast, PDGF-induced H(2)O(2) production in cells expressing a receptor in which the binding sites for GAP, SHP-2, and PLC-gamma1 were all mutated was slightly greater than that in cells expressing the wild-type receptor. Only the PI3K binding site was alone sufficient for PDGF-induced H(2)O(2) production. The effect of PDGF on H(2)O(2) generation was blocked by the PI3K inhibitors LY294002 and wortmannin or by overexpression of a dominant negative mutant of Rac1. These results suggest that a product of PI3K is required for PDGF-induced production of H(2)O(2) in nonphagocytic cells, and that Rac1 mediates signaling between the PI3K product and the putative NADPH oxidase.
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Affiliation(s)
- Y S Bae
- Center for Cell Signaling Research, Division of Molecular Life Sciences, and Department of Biological Sciences, Ewha Womans University, Seoul 120-750, Korea.
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He G, Kim OS, Thistlethwaite JR, Hart J, Siegel CT, Szot GL, Newell KA. Differential effect of an anti-CD8 monoclonal antibody on rejection of murine intestine and cardiac allografts. Transplant Proc 1999; 31:1239-41. [PMID: 10083553 DOI: 10.1016/s0041-1345(98)01978-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- G He
- Department of Surgery, University of Chicago, IL 60637, USA
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He G, Hart J, Kim OS, Szot GL, Siegel CT, Thistlethwaite JR, Newell KA. The role of CD8 and CD4 T cells in intestinal allograft rejection: a comparison of monoclonal antibody-treated and knockout mice. Transplantation 1999; 67:131-7. [PMID: 9921809 DOI: 10.1097/00007890-199901150-00022] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The relative contribution of CD8 and CD4 T cells to allograft rejection remains an unresolved issue. Experimental results suggest that the relative importance of these T-cell subsets may vary depending on the model used and the organ studied. We have previously shown that treatment of murine recipients of intestinal allografts with a depleting anti-CD8 or a depleting anti-CD4 monoclonal antibody (mAb) significantly inhibited allograft rejection. This study was undertaken to further examine the contribution of CD8 and CD4 T cells to the rejection of intestinal allografts. METHODS Intestinal allografts from B6C3F1/J (C57BL/6 x C3H/HeJ) mice were transplanted into C57BL/6 recipients. Recipient groups included mice with an acquired deficiency in CD8 or CD4 T cells caused by treatment with depleting mAb or mice genetically deficient in CD8 or CD4 T cells as a result of disruption of the genes encoding major histocompatibility complex (MHC) class I, MHC class II, CD8, or CD4. In all cases, rejection was assessed histologically at predetermined time points. In some recipient groups, graft function was also assessed using a maltose absorption assay. RESULTS Rejection, assessed between days 10 and 28 after transplantation, was significantly inhibited in mice deficient in CD8 or CD4 T cells after treatment with depleting mAb. In contrast, mice genetically deficient in either CD8 T cells (MHC class I or CD8 knockouts) or CD4 T cells (MHC class II or CD4 knockouts) rejected intestinal allografts promptly. Both histologic and functional evaluation of anti-CD8 mAb-treated mice on day 60 showed that the inhibition of rejection persisted even after the return of a substantial number of CD8 T cells. Although intestinal allografts from anti-CD8 mAb-treated mice displayed little to no evidence of rejection on day 60 after transplantation, these mice were able to reject both donor and third-party skin grafts. CONCLUSIONS These results demonstrate that the inhibition of intestinal allograft rejection associated with mAb treatment is not attributable solely to depletion of CD8 or CD4 T cells. Furthermore, anti-CD8 mAb administration did not induce donor-specific tolerance or cause nonspecific immune suppression, as indicated by the skin-grafting experiments. Our findings suggest that at least some depleting mAbs mediate their protective effect on allograft rejection via an alternative mechanism such as the induction of a regulatory cell population(s).
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Affiliation(s)
- G He
- Department of Surgery, University of Chicago, Illinois 60637, USA
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Kim OS. [Nursing intervention in relation to development level of middle age]. Taehan Kanho 1984; 23:24-5, 23. [PMID: 6564288] [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: 04/05/2023]
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Choi D, Kim OS. [The future role and position of Korean nurses in America]. Taehan Kanho 1983; 22:83-93. [PMID: 6556382] [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: 05/21/2023]
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Cho WJ, Kim OS. [Panel discussion: nurses' status in the community]. Taehan Kanho 1983; 22:108-14. [PMID: 6556377] [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: 04/05/2023]
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Niepomniszcze H, Castells S, DeGroot LJ, Refetoff S, Kim OS, Rapoport B, Hati R. Peroxidase defect in congenital goiter with complete organification block. J Clin Endocrinol Metab 1973; 36:347-57. [PMID: 4345693 DOI: 10.1210/jcem-36-2-347] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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