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Das A, Yesupatham S, Allison D, Tanwar H, Gnanasekaran J, Kear B, Wang X, Wang S, Zachariadou C, Abbasi Y, Chung M, Ozato K, Liu C, Foster B, Thumbigere-Math V. Murine IRF8 Mutation Offers New Insight into Osteoclast and Root Resorption. J Dent Res 2024; 103:318-328. [PMID: 38343385 PMCID: PMC10985390 DOI: 10.1177/00220345231222173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024] Open
Abstract
Interferon regulatory factor 8 (IRF8), a transcription factor expressed in immune cells, functions as a negative regulator of osteoclasts and helps maintain dental and skeletal homeostasis. Previously, we reported that a novel mutation in the IRF8 gene increases susceptibility to multiple idiopathic cervical root resorption (MICRR), a form of tooth root resorption mediated by increased osteoclast activity. The IRF8 G388S variant in the highly conserved C-terminal motif is predicted to alter the protein structure, likely impairing IRF8 function. To investigate the molecular basis of MICRR and IRF8 function in osteoclastogenesis, we generated Irf8 knock-in (KI) mice using CRISPR/Cas9 technique modeling the human IRF8G388S mutation. The heterozygous (Het) and homozygous (Homo) Irf8 KI mice showed no gross morphological defects, and the development of hematopoietic cells was unaffected and similar to wild-type (WT) mice. The Irf8 KI Het and Homo mice showed no difference in macrophage gene signatures important for antimicrobial defenses and inflammatory cytokine production. Consistent with the phenotype observed in MICRR patients, Irf8 KI Het and Homo mice demonstrated significantly increased osteoclast formation and resorption activity in vivo and in vitro when compared to WT mice. The oral ligature-inserted Het and Homo mice displayed significantly increased root resorption and osteoclast-mediated alveolar bone loss compared to WT mice. The increased osteoclastogenesis noted in KI mice is due to the inability of IRF8G388S mutation to inhibit NFATc1-dependent transcriptional activation and downstream osteoclast specific transcripts, as well as its impact on autophagy-related pathways of osteoclast differentiation. This translational study delineates the IRF8 domain important for osteoclast function and provides novel insights into the IRF8 mutation associated with MICRR. IRF8G388S mutation mainly affects osteoclastogenesis while sparing immune cell development and function. These insights extend beyond oral health and significantly advance our understanding of skeletal disorders mediated by increased osteoclast activity and IRF8's role in osteoclastogenesis.
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Affiliation(s)
- A. Das
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - S.K. Yesupatham
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - D. Allison
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - H. Tanwar
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - J. Gnanasekaran
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - B. Kear
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - X. Wang
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - S. Wang
- Department of Neural and Pain Sciences, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - C. Zachariadou
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Y. Abbasi
- Department of Neural and Pain Sciences, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - M.K. Chung
- Department of Neural and Pain Sciences, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - K. Ozato
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD, USA
| | - C. Liu
- Transgenic Core, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD, USA
| | - B.L. Foster
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - V. Thumbigere-Math
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
- National Institute of Dental and Craniofacial Research, NIH, Bethesda, MD, USA
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Muromachi K, Hosomichi K, Park H, Yamaguchi T, Tani-Ishii N. Identification of Candidate Genes of Familial Multiple Idiopathic Cervical Root Resorption. J Endod 2023; 49:1537-1547. [PMID: 37742719 DOI: 10.1016/j.joen.2023.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 09/12/2023] [Accepted: 09/17/2023] [Indexed: 09/26/2023]
Abstract
INTRODUCTION Multiple idiopathic cervical root resorption (MICRR) is a disease with an unknown etiology that causes invasive cervical root resorption in multiple teeth. Although previous MICRR genomic studies have identified candidate gene variants, the etiology of the condition remains poorly understood. In the present study, we investigated the genetic causality of MICRR to explore candidate variants. METHODS Saliva samples from a family containing 2 affected and two unaffected subjects with the dominant transmission of MICRR were subjected to whole-exome sequencing. RESULTS As a result, we identified novel candidate variants of 10 genes. Each variant was confirmed by Sanger sequencing. Among them, the American College of Medical Genetics and Genomics and the Association for Molecular Pathology (ACMG/AMP) guidelines classified doublecortin domain containing 1 (c.1099 C > T) and β-defensin 114 (c.189 T > G) as "pathogenic," and solute carrier family 45 member 2 (c.152_153del) as "likely pathogenic." CONCLUSIONS These results provide new insight to help clarify the pathogenesis of MICRR, and the variants could be applied for further investigation to understand invasive cervical root resorption.
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Affiliation(s)
- Koichiro Muromachi
- Department of Endodontics, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan.
| | - Kazuyoshi Hosomichi
- Laboratory of Computational Genomics, School of Life Science, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Heetae Park
- Department of Orthodontics, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Tetsutaro Yamaguchi
- Department of Orthodontics, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan.
| | - Nobuyuki Tani-Ishii
- Department of Endodontics, Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
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3
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Wang N, Zhang M, Zhu J, Zhu Y, Wu J. Multiple idiopathic cervical root resorption: A systematic review. Oral Dis 2023; 29:2409-2422. [PMID: 36251582 DOI: 10.1111/odi.14406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/08/2022] [Accepted: 10/12/2022] [Indexed: 11/28/2022]
Abstract
The current literature on multiple idiopathic cervical root resorption (MICRR), a rare and aggressive form of external root resorption, is limited to case reports and series. Therefore, we performed a systematic review of this condition. A comprehensive search of PubMed, Embase, Web of science, Cochrane Library, CNKI, and WANFANG was conducted using key terms relevant to MICRR, supplemented by a grey literature search. Risk of bias was assessed using Cochrane's and Joanna Briggs Institute's tools. A total of 36 studies with 47 cases were included. MICRR is more common among younger females and may be related to hormonal changes and denosumab use. Initially, the premolars are usually affected but all permanent teeth may eventually be involved. Cone-beam computed tomography is recommended for diagnosis and assessment of resorptive lesions. The management is focused on complete removal and restoration of the resorptive tissue to maintain the tooth's structural integrity. However, MICRR usually has a poor prognosis. Due to its invasive and aggressive behavior, MICRR requires greater attention.
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Affiliation(s)
- Ningxiang Wang
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
- Department of Stomatology, Nanjing Hospital of Chinese Medicine, Nanjing University of Traditional Chinese Medicine, Nanjing, China
| | - Mei Zhang
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jiaye Zhu
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yaoyao Zhu
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Juan Wu
- Department of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
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4
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Tanwar H, Gnanasekaran JM, Allison D, Chuang LS, He X, Aimetti M, Baima G, Costalonga M, Cross RK, Sears C, Mehandru S, Cho J, Colombel JF, Raufman JP, Thumbigere-Math V. Unraveling the Link between Periodontitis and Inflammatory Bowel Disease: Challenges and Outlook. ARXIV 2023:arXiv:2308.10907v1. [PMID: 37645044 PMCID: PMC10462160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Periodontitis and Inflammatory Bowel Disease (IBD) are chronic inflammatory conditions, characterized by microbial dysbiosis and hyper-immunoinflammatory responses. Growing evidence suggest an interconnection between periodontitis and IBD, implying a shift from the traditional concept of independent diseases to a complex, reciprocal cycle. This review outlines the evidence supporting an "Oral-Gut" axis, marked by a higher prevalence of periodontitis in IBD patients and vice versa. The specific mechanisms linking periodontitis and IBD remain to be fully elucidated, but emerging evidence points to the ectopic colonization of the gut by oral bacteria, which promote intestinal inflammation by activating host immune responses. This review presents an in-depth examination of the interconnection between periodontitis and IBD, highlighting the shared microbiological and immunological pathways, and proposing a "multi-hit" hypothesis in the pathogenesis of periodontitis-mediated intestinal inflammation. Furthermore, the review underscores the critical need for a collaborative approach between dentists and gastroenterologists to provide holistic oral-systemic healthcare.
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Affiliation(s)
- Himanshi Tanwar
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | | | - Devon Allison
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - Ling-shiang Chuang
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Xuesong He
- Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA
| | - Mario Aimetti
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, Turin, Italy
| | - Giacomo Baima
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, Turin, Italy
| | - Massimo Costalonga
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, USA
| | - Raymond K. Cross
- Division of Gastroenterology & Hepatology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Cynthia Sears
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Saurabh Mehandru
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Judy Cho
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jean-Frederic Colombel
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jean-Pierre Raufman
- Division of Gastroenterology & Hepatology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Vivek Thumbigere-Math
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
- National Institute of Dental and Craniofacial Research, NIH, Bethesda, MD, USA
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5
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Jin W, Chen F, Fang Q, Mao G, Bao Y. Oligosaccharides from Sargassum thunbergii inhibit osteoclast differentiation via regulation of IRF-8 signaling. Exp Gerontol 2023; 172:112057. [PMID: 36513214 DOI: 10.1016/j.exger.2022.112057] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022]
Abstract
Osteoporosis (OP) is a systemic bone degenerative disease characterized by low bone mass and deteriorated microarchitecture of bone tissue, causing high morbidity and mortality rates. Bone resorption by overactivated osteoclasts (OCs) is the main cause of osteoporosis. Glucuronomannan and its oligomers (Gs) and their sulfated derivatives (SGs) were previously prepared. The anti-osteoporosis activities of these glycans were evaluated. Firstly, we determined the viability of RAW264.7 by CCK-8 test. Nextly, we investigated the inhibitory effects of Gs and SGs on the differentiation of RAW264.7 cells into OCs using tartrate-resistant acid phosphatase (TRAP) staining, F-actin ring staining, qualitative reverse-transcription polymerase chain reaction(qRT-PCR) and western blotting. TRAP staining revealed that Gs significantly blocked RANKL-induced OC generation while SGs did not exhibit this ability. F-actin staining assays demonstrated that Gs inhibits RANKL-induced actin ring formation. qRT-PCR analyses indicated that Gs dose-dependently inhibited the expression of OCs marker genes including Trap, NFATc1, c-Fos, DC-Stamp and ATP60 during the differentiation process, while SGs did not suppress. Regarding the mechanism of Gs, it was found that Gs suppressed osteoclastogenesis via inhibiting the degradation of IRF-8 and interfering with NF-κB pathway activation. Together, these results suggest that Gs have the ability to inhibit osteoclastogenesis by modulating IRF-8 signaling.
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Affiliation(s)
- Weihua Jin
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China..
| | - Fen Chen
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Qiufu Fang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Genxiang Mao
- Zhejiang Provincial Key Lab of Geriatrics, Department of Geriatrics, Zhejiang Hospital, Hangzhou 310013, PR China.
| | - Yizhong Bao
- Zhejiang Provincial Key Lab of Geriatrics, Department of Geriatrics, Zhejiang Hospital, Hangzhou 310013, PR China.
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6
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Bi F, Tang H, Zhang Z, Lyu Y, Huo F, Chen G, Guo W. Hertwig's epithelial root sheath cells show potential for periodontal complex regeneration. J Periodontol 2023; 94:263-276. [PMID: 35912965 DOI: 10.1002/jper.22-0072] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 07/15/2022] [Accepted: 07/15/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although researchers have been exploring therapeutic strategies of treating serious periodontal tissue loss, including the application of stem cells, tissue regeneration of the periodontal complex involving cementum, periodontium, and alveolar bone has hardly been achieved. Aiming at tackling the problem of severely damaged periodontal complex, it is worth trying to make advantages of Hertwig's epithelial root sheath (HERS) cells to tissue regeneration mimicking the physiological developmental process with their ability of cementum, bone, and periodontium formation. METHODS HERS cells and dental follicle cells (DFCs) were acquired from Sprague Dawley rats' molar germs and identified by immunofluorescence. Alizarin red assay, ALP staining, AKP test, real-time quantitative polymerase chain reaction (RT-qPCR) and Western blot were conducted to confirm the osteogenic potential, epithelial-mesenchymal transition (EMT) character of harvested HERS cells and epithelial-mesenchymal interaction (EMI) with DFCs. An animal model of periodontal defect was constructed to testify the tissue regeneration ability in vivo. Micro-CT and histological examinations were interpreted to unveil the tissue repair outcomes. RESULTS HERS cells expressed strong epithelial cell markers CK14 and E-cadherin. The in vitro experiments overall showed the concretely enhanced osteogenic differentiation ability in either HERS group or HERS+DFC group. Meanwhile, the in vivo conduction of rat mandibular periodontal repair experiment showed regenerative effectiveness of periodontal complex structure in both HERS and HERS+DFC group in situ, testified by Micro-CT and histological analysis. CONCLUSIONS HERS cells show potential for periodontal tissue regeneration which suggests the future possibilities of being considered as one of the cell choices for severely damaged periodontal tissue repair.
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Affiliation(s)
- Fei Bi
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Huilin Tang
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Zhijun Zhang
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yun Lyu
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fangjun Huo
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Guoqing Chen
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Weihua Guo
- Engineering Research Center of Oral Translational Medicine, Ministry of Education, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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7
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Hu H, Duan Y, Wang K, Fu H, Liao Y, Wang T, Zhang Z, Kang F, Zhang B, Zhang H, Huo F, Yin Y, Chen G, Hu H, Cai H, Tian W, Li Z. Dental niche cells directly contribute to tooth reconstitution and morphogenesis. Cell Rep 2022; 41:111737. [PMID: 36476878 DOI: 10.1016/j.celrep.2022.111737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/10/2022] [Accepted: 11/07/2022] [Indexed: 12/12/2022] Open
Abstract
Mammalian teeth develop from the inductive epithelial-mesenchymal interaction, an important mechanism shared by many organs. The cellular basis for such interaction remains elusive. Here, we generate a dual-fluorescence model to track and analyze dental cells from embryonic to postnatal stages, in which Pitx2+ epithelium and Msx1+ mesenchyme are sufficient for tooth reconstitution. Single-cell RNA sequencing and spatial mapping further revealed critical cellular dynamics during molar development, where tooth germs are organized by Msx1+Sdc1+ dental papilla and surrounding dental niche. Surprisingly, niche cells are more efficient in tooth reconstitution and can directly regenerate papilla cells through interaction with dental epithelium. Finally, from the dental niche, we identify a group of previously unappreciated migratory Msx1+ Sox9+ cells as the potential cell origin for dental papilla. Our results indicate that the dental niche cells directly contribute to tooth organogenesis and provide critical insights into the essential cell composition for tooth engineering.
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Affiliation(s)
- Hong Hu
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yufeng Duan
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Kun Wang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Huancheng Fu
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yuansong Liao
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Tianshu Wang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Ziwei Zhang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Fanchen Kang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Baiquan Zhang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Haiying Zhang
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Fangjun Huo
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yike Yin
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China
| | - Guoqing Chen
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China; School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Hongbo Hu
- Department of Rheumatology and Immunology, Department of Urology, Department of Pathology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Center of Biotherapy, Chengdu, China
| | - Haoyang Cai
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China.
| | - Weidong Tian
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Zhonghan Li
- State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Center of Growth Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, College of Life Sciences, Sichuan University, Chengdu, China; National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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8
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Wu H, Li Y, Shi G, Du S, Wang X, Ye W, Zhang Z, Chu Y, Ma S, Wang D, Li Y, Chen Z, Birnbaumer L, Wang Z, Yang Y. Hepatic interferon regulatory factor 8 expression suppresses hepatocellular carcinoma progression and enhances the response to anti-programmed cell death protein-1 therapy. Hepatology 2022; 76:1602-1616. [PMID: 34989013 PMCID: PMC9256853 DOI: 10.1002/hep.32316] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 12/17/2021] [Accepted: 01/03/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Therapeutic blockade of the programmed cell death protein-1 (PD-1) immune checkpoint pathways has resulted in significant reactivation of T cell-mediated antitumor immunity and is a promising clinical anticancer treatment modality in several tumor types, but the durable response rate remains relatively low (15%-20%) in most patients with HCC for unknown reasons. Evidence reveals that the interferon signaling pathway plays a critical role in modulating the efficacy and sensitivity of anti-PD-1 therapy against multiple tumor types, but the mechanisms are unclear. APPROACH AND RESULTS Using Kaplan-Meier survival analysis based on HCC databases, we found that deceased expression of interferon regulatory factor (IRF) 8 in HCC, among all the nine IRF members that regulate interferon signals, was associated with poor prognosis of patients with HCC. Moreover, gene set enrichment analysis identified the interferon-gamma and PD-1 signaling signatures as the top suppressed pathways in patients with IRF8-low HCC. Contrarily, overexpression of IRF8 in HCC cells significantly enhanced antitumor effects in immune-competent mice, modulating infiltration of tumor-associated macrophages (TAMs) and T cell exhaustion in tumor microenvironment. We further demonstrated that IRF8 regulated recruitment of TAMs by inhibiting the expression of chemokine (C-C motif) ligand 20 (CCL20). Mechanically, IRF8-mediated repression of c-fos transcription resulted in decreased expression of CCL20, rather than directly bound to CCL20 promoter region. Importantly, adeno-associated virus 8-mediated hepatic IRF8 rescue significantly suppressed HCC progression and enhanced the response to anti-PD-1 therapy. CONCLUSIONS This work identified IRF8 as an important prognostic biomarker in patients with HCC that predicted the response and sensitivity to anti-PD-1 therapy and uncovered it as a therapeutic target for enhancing the efficacy of immune therapy.
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Affiliation(s)
- Hongxi Wu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Yan Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Guangjiang Shi
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Shijia Du
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Xiaobin Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Wanli Ye
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Zixuan Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Ya Chu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Shuqian Ma
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Dajia Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Yuan Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Zhen Chen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
| | - Lutz Birnbaumer
- Institute of Biomedical Research (BIOMED), Catholic University of Argentina, Buenos Aires C1107AFF, Argentina, and Neurobiology Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA
| | - Zhuo Wang
- School of Pharmacy, Nanjing University of Chinese Medicine, 210023 Nanjing, China
| | - Yong Yang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu 211198, PR China
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9
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Qin W, Gao J, Ma S, Wang Y, Li DM, Jiang WK, Chen F, Tay F, Niu LN. Multiple Cervical Root Resorption Involving 22 Teeth: A Case with Potential Genetic Predisposition. J Endod 2022; 48:1526-1532. [DOI: 10.1016/j.joen.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/25/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022]
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10
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Regulation of TNF-Induced Osteoclast Differentiation. Cells 2021; 11:cells11010132. [PMID: 35011694 PMCID: PMC8750957 DOI: 10.3390/cells11010132] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 12/27/2022] Open
Abstract
Increased osteoclast (OC) differentiation and activity is the critical event that results in bone loss and joint destruction in common pathological bone conditions, such as osteoporosis and rheumatoid arthritis (RA). RANKL and its decoy receptor, osteoprotegerin (OPG), control OC differentiation and activity. However, there is a specific concern of a rebound effect of denosumab discontinuation in treating osteoporosis. TNFα can induce OC differentiation that is independent of the RANKL/RANK system. In this review, we discuss the factors that negatively and positively regulate TNFα induction of OC formation, and the mechanisms involved to inform the design of new anti-resorptive agents for the treatment of bone conditions with enhanced OC formation. Similar to, and being independent of, RANKL, TNFα recruits TNF receptor-associated factors (TRAFs) to sequentially activate transcriptional factors NF-κB p50 and p52, followed by c-Fos, and then NFATc1 to induce OC differentiation. However, induction of OC formation by TNFα alone is very limited, since it also induces many inhibitory proteins, such as TRAF3, p100, IRF8, and RBP-j. TNFα induction of OC differentiation is, however, versatile, and Interleukin-1 or TGFβ1 can enhance TNFα-induced OC formation through a mechanism which is independent of RANKL, TRAF6, and/or NF-κB. However, TNFα polarized macrophages also produce anabolic factors, including insulin such as 6 peptide and Jagged1, to slow down bone loss in the pathological conditions. Thus, the development of novel approaches targeting TNFα signaling should focus on its downstream molecules that do not affect its anabolic effect.
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11
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Dang D, Liu Y, Zhou Q, Li H, Wang Y, Wu H. Identification of a novel IRF8 homozygous mutation causing neutrophilia, monocytopenia and fatal infection in a female neonate. INFECTION GENETICS AND EVOLUTION 2021; 96:105121. [PMID: 34666172 DOI: 10.1016/j.meegid.2021.105121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/12/2021] [Accepted: 10/11/2021] [Indexed: 12/29/2022]
Abstract
Inborn errors of immunity (IEIs) result from mutations in genes involved in host immune defense and immune regulation. Herein, we report the identification of a novel IRF8 mutation in a neonate with an IEI. DNA samples from both the neonate and her parents were subjected to DNA sequencing, and the immune status of the patient was assessed. We identified a mutation (c.331C > T, p. Arg111*) in the interferon regulatory factor 8 (IRF8) gene that manifested as sever dysfunctional neutrophilia (96.53 × 109/l) and monocytopenia (0.02 × 109/l). The patient's CD3+ T cell and CD8+ T cell counts were decreased. Her levels of IFN-γ were low even during severe infection. The mRNA expression levels of IRF8 were lower than normal. Her clinical manifestations included a recurrent and progressively fatal infection. Since IRF8 plays a key role in the differentiation and development of immune cells, we suspected that the novel mutation (c.331C > T, p. Arg111*) may be consistent with a severe loss of IRF8 function and result in a failure of immune cells to differentiate and maturation, and lead to a severe infection with early onset.
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Affiliation(s)
- Dan Dang
- Department of Neonatology, First Hospital of Jilin University, Changchun 130021, China
| | - Ying Liu
- Department of Neonatology, First Hospital of Jilin University, Changchun 130021, China
| | - Qi Zhou
- Department of Neonatology, First Hospital of Jilin University, Changchun 130021, China
| | - Heng Li
- Department of Neonatology, First Hospital of Jilin University, Changchun 130021, China
| | - Ying Wang
- Research Institute of pediatrics, First Hospital of Jilin University, Changchun 130021, China
| | - Hui Wu
- Department of Neonatology, First Hospital of Jilin University, Changchun 130021, China.
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12
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Tsumura M, Miki M, Mizoguchi Y, Hirata O, Nishimura S, Tamaura M, Kagawa R, Hayakawa S, Kobayashi M, Okada S. Enhanced osteoclastogenesis in patients with MSMD due to impaired response to IFN-γ. J Allergy Clin Immunol 2021; 149:252-261.e6. [PMID: 34176646 DOI: 10.1016/j.jaci.2021.05.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Patients with Mendelian susceptibility to mycobacterial disease (MSMD) experience recurrent and/or persistent infectious diseases associated with poorly virulent mycobacteria. Multifocal osteomyelitis is among the representative manifestations of MSMD. The frequency of multifocal osteomyelitis is especially high in patients with MSMD etiologies that impair cellular response to IFN-γ, such as IFN-γR1, IFN-γR2, or STAT1 deficiency. OBJECTIVES This study sought to characterize the mechanism underlying multifocal osteomyelitis in MSMD. METHODS GM colonies prepared from bone marrow mononuclear cells from patients with autosomal dominant (AD) IFN-γR1 deficiency, AD STAT1 deficiency, or STAT1 gain of function (GOF) and from healthy controls were differentiated into osteoclasts in the presence or absence of IFN-γ. The inhibitory effect of IFN-γ on osteoclastogenesis was investigated by quantitative PCR, immunoblotting, tartrate-resistant acid phosphatase staining, and pit formation assays. RESULTS Increased osteoclast numbers were identified by examining the histopathology of osteomyelitis in patients with AD IFN-γR1 deficiency or AD STAT1 deficiency. In the presence of receptor activator of nuclear factor kappa-B ligand and M-CSF, GM colonies from patients with AD IFN-γR1 deficiency, AD STAT1 deficiency, or STAT1 GOF differentiated into osteoclasts, similar to GM colonies from healthy volunteers. IFN-γ concentration-dependent inhibition of osteoclast formation was impaired in GM colonies from patients with AD IFN-γR1 deficiency or AD STAT1 deficiency, whereas it was enhanced in GM colonies from patients with STAT1 GOF. CONCLUSIONS Osteoclast differentiation is increased in AD IFN-γR1 deficiency and AD STAT1 deficiency due to an impaired response to IFN-γ, leading to excessive osteoclast proliferation and, by inference, increased bone resorption in infected foci, which may underlie multifocal osteomyelitis.
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Affiliation(s)
- Miyuki Tsumura
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - Mizuka Miki
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan; Department of Pediatrics, Hiroshima Red Cross Hospital and Atomic-bomb Survivors Hospital, Hiroshima, Japan
| | - Yoko Mizoguchi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - Osamu Hirata
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan; Hidamari Children Clinic, Hiroshima, Japan
| | - Shiho Nishimura
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan; Department of Pediatrics, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan
| | - Moe Tamaura
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan; Department of Pediatrics, Hiroshima-Nishi Medical Center, Hiroshima, Japan
| | - Reiko Kagawa
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - Seiichi Hayakawa
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan
| | - Masao Kobayashi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan; Japanese Red Cross, Chugoku-Shikoku Block Blood Center, Hiroshima, Japan
| | - Satoshi Okada
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.
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13
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Chen Y, Huang Y, Deng X. External cervical resorption-a review of pathogenesis and potential predisposing factors. Int J Oral Sci 2021; 13:19. [PMID: 34112752 PMCID: PMC8192751 DOI: 10.1038/s41368-021-00121-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/15/2021] [Accepted: 03/05/2021] [Indexed: 12/22/2022] Open
Abstract
External cervical resorption (ECR) refers to a pathological state in which resorption tissues penetrate into the dentin at the cervical aspect of the root. Despite being latent in its initial phase, ECR could cause severe damage to mineralized dental tissue and even involve the pulp if not given timely diagnosis and treatment. Nevertheless, the etiology of ECR is still poorly understood, which adds to the difficulty in early diagnosis. ECR has received growing attention in recent years due to the increasing number of clinical cases. Several potential predisposing factors have been recognized in cross-sectional studies as well as case reports. In the meantime, studies on histopathology and pathogenesis have shed light on possible mechanisms of ECR. This review aims to summarize the latest findings in the pathogenesis and potential predisposing factors of ECR, so as to provide pragmatic reference for clinical practice.
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Affiliation(s)
- Yiming Chen
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Ying Huang
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China.
| | - Xuliang Deng
- Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China.
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14
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Chen Y, Huang Y, Deng X. A Review of External Cervical Resorption. J Endod 2021; 47:883-894. [PMID: 33745945 DOI: 10.1016/j.joen.2021.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 03/08/2021] [Accepted: 03/08/2021] [Indexed: 12/21/2022]
Abstract
External cervical resorption (ECR) is a relatively uncommon yet aggressive form of dental hard tissue destruction. It is initiated at the cervical aspect of the root surface and extends apicocoronally and circumferentially inside the dentin. Despite the large number of case reports and clinical studies that have investigated ECR, its etiology remains unclear. Recent advancements in clinical assessment measures, such as the use of cone-beam computed tomographic imaging, have provided additional insights into the nature of this lesion. This has facilitated the continued development and improvement of treatment methods for this condition. In this article, we provide an overview of the latest research pertaining to the etiology, histopathology, predisposing factors, diagnosis, classification, and treatment of ECR. Furthermore, we provide a summary of the different classification schemes for ECR and highlight the relevant therapeutic principles.
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Affiliation(s)
- Yiming Chen
- Department of Geriatric Dentistry, National Medical Products Administration Key Laboratory for Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing, China
| | - Ying Huang
- Department of Geriatric Dentistry, National Medical Products Administration Key Laboratory for Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing, China.
| | - Xuliang Deng
- Department of Geriatric Dentistry, National Medical Products Administration Key Laboratory for Dental Materials, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing, China.
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15
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Chu EY, Deeb JG, Foster BL, Hajishengallis E, Somerman MJ, Thumbigere-Math V. Multiple Idiopathic Cervical Root Resorption: A Challenge for a Transdisciplinary Medical-Dental Team. FRONTIERS IN DENTAL MEDICINE 2021; 2:652605. [PMID: 34368800 PMCID: PMC8340576 DOI: 10.3389/fdmed.2021.652605] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The goal of this perspective article is to use multiple idiopathic cervical root resorption (MICRR) as a model to demonstrate the need for transdisciplinary collaborations, from basic science to treatment planning, to improve the quality of health care for all. This is not a review of the literature on the current state of MICRR. Tooth root resorption is a normal physiological process required for resorption and exfoliation of primary teeth; however, root resorption of adult teeth is largely pathological. MICRR is an aggressive form of external root resorption, which occurs near the cemento-enamel junction (CEJ). The cause of MICRR remains elusive, however, it is mediated primarily by osteoclasts/odontoclasts. Accumulating case studies and experiments in animal models have provided insights into defining the etiologies and pathophysiological mechanisms for MICRR, which include: systemic conditions and syndromes, inherited genetic variants affecting osteoclast/odontoclast activity, altered periodontal structures, drug-induced root resorption and rebound effects after cessation of anti-resorptive treatment, chemotherapy, exposure to pets or viral infections, and other factors such as inflammatory conditions or trauma. To determine the causative factors for MICRR, as well as other oral-dental conditions, at minimum, a comprehensive health history should be collected for all patients by dental care providers, discussed with other health care providers and appropriate collaborations established. The examples highlighted in this perspective emphasize the need for transdisciplinary research collaborations coupled with integrated management strategies between medicine and dentistry in order to identify cause(s) early and improve clinical outcomes.
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Affiliation(s)
- Emily Y. Chu
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Janina Golob Deeb
- Department of Periodontics, School of Dentistry, Virginia Commonwealth University, Richmond, VA, United States
| | - Brian L. Foster
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, United States
| | - Evlambia Hajishengallis
- Divisions of Pediatric Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Martha J. Somerman
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Vivek Thumbigere-Math
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, United States
- Division of Periodontics, University of Maryland School of Dentistry, Baltimore, MD, United States
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16
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Hansen AR, Borgwardt L, Rasmussen ÅK, Godballe C, Poulsen MM, Vieira FG, Mathiesen JS, Rossing M. Germline RET Leu56Met Variant Is Likely Not Causative of Multiple Endocrine Neoplasia Type 2. Front Endocrinol (Lausanne) 2021; 12:764512. [PMID: 34925234 PMCID: PMC8672160 DOI: 10.3389/fendo.2021.764512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/02/2021] [Indexed: 11/30/2022] Open
Abstract
Activating variants in the receptor tyrosine kinase REarranged during Transfection (RET) cause multiple endocrine neoplasia type 2 (MEN 2), an autosomal dominantly inherited cancer-susceptibility syndrome. The variant c.166C>A, p.Leu56Met in RET was recently reported in two patients with medullary thyroid cancer (MTC). The presence of a pheochromocytoma in one of the patients, suggested a possible pathogenic role of the variant in MEN 2A. Here, we present clinical follow up of a Danish RET Leu56Met cohort. Patients were evaluated for signs of MEN 2 according to a set of predefined criteria. None of the seven patients in our cohort exhibited evidence of MEN 2. Furthermore, we found the Leu56Met variant in our in-house diagnostic cohort with an allele frequency of 0.59%, suggesting that it is a common variant in the population. Additionally, none of the patients who harbored the allele were listed in the Danish MTC and MEN 2 registries. In conclusion, our findings do not support a pathogenic role of the Leu56Met variant in MEN 2.
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Affiliation(s)
- Anna Reimer Hansen
- Center for Genomic Medicine, Copenhagen University Hospital, Copenhagen, Denmark
| | - Line Borgwardt
- Center for Genomic Medicine, Copenhagen University Hospital, Copenhagen, Denmark
| | - Åse Krogh Rasmussen
- Department of Endocrinology and Metabolism, Copenhagen University Hospital, Copenhagen, Denmark
| | - Christian Godballe
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Morten Møller Poulsen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Filipe G. Vieira
- Center for Genomic Medicine, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jes Sloth Mathiesen
- Department of Otorhinolaryngology, Head & Neck Surgery and Audiology, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Maria Rossing
- Center for Genomic Medicine, Copenhagen University Hospital, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
- *Correspondence: Maria Rossing,
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17
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Das A, Wang X, Kang J, Coulter A, Shetty AC, Bachu M, Brooks SR, Dell'Orso S, Foster BL, Fan X, Ozato K, Somerman MJ, Thumbigere-Math V. Monocyte Subsets With High Osteoclastogenic Potential and Their Epigenetic Regulation Orchestrated by IRF8. J Bone Miner Res 2021; 36:199-214. [PMID: 32804442 PMCID: PMC8168257 DOI: 10.1002/jbmr.4165] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/21/2020] [Accepted: 08/05/2020] [Indexed: 12/24/2022]
Abstract
Osteoclasts (OCs) are bone-resorbing cells formed by the serial fusion of monocytes. In mice and humans, three distinct subsets of monocytes exist; however, it is unclear if all of them exhibit osteoclastogenic potential. Here we show that in wild-type (WT) mice, Ly6Chi and Ly6Cint monocytes are the primary source of OC formation when compared to Ly6C- monocytes. Their osteoclastogenic potential is dictated by increased expression of signaling receptors and activation of preestablished transcripts, as well as de novo gain in enhancer activity and promoter changes. In the absence of interferon regulatory factor 8 (IRF8), a transcription factor important for myelopoiesis and osteoclastogenesis, all three monocyte subsets are programmed to display higher osteoclastogenic potential. Enhanced NFATc1 nuclear translocation and amplified transcriptomic and epigenetic changes initiated at early developmental stages direct the increased osteoclastogenesis in Irf8-deficient mice. Collectively, our study provides novel insights into the transcription factors and active cis-regulatory elements that regulate OC differentiation. © 2020 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Amitabh Das
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA.,Laboratory of Oral and Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Xiaobei Wang
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA.,Laboratory of Oral and Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Jessica Kang
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA
| | - Alyssa Coulter
- Laboratory of Oral and Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Amol C Shetty
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Mahesh Bachu
- Molecular Genetics of Immunity Section, Division of Developmental Biology, National Institute of Child Health and Human Development (NICHD), Bethesda, MD, USA.,Arthritis and Tissue Degeneration Program and the David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY, USA
| | - Stephen R Brooks
- Biodata Mining and Discovery Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Stefania Dell'Orso
- Biodata Mining and Discovery Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Brian L Foster
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Xiaoxuan Fan
- Flow Cytometry Shared Service, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Keiko Ozato
- Molecular Genetics of Immunity Section, Division of Developmental Biology, National Institute of Child Health and Human Development (NICHD), Bethesda, MD, USA
| | - Martha J Somerman
- Laboratory of Oral and Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
| | - Vivek Thumbigere-Math
- Division of Periodontology, University of Maryland School of Dentistry, Baltimore, MD, USA.,Laboratory of Oral and Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), Bethesda, MD, USA
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18
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Giovani PA, Martins L, Salmon CR, Mofatto LS, Leme AFP, Puppin-Rontani RM, Kolli TN, Foster BL, Nociti FH, Kantovitz KR. Comparative proteomic analysis of dental cementum from deciduous and permanent teeth. J Periodontal Res 2020; 56:173-185. [PMID: 33210734 DOI: 10.1111/jre.12808] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/29/2020] [Accepted: 09/16/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND OBJECTIVES Dental cementum (DC) is a mineralized tissue covering tooth roots that plays a critical role in dental attachment. Differences in deciduous vs. permanent tooth DC have not been explored. We hypothesized that proteomic analysis of DC matrix would identify compositional differences in deciduous (DecDC) vs. permanent (PermDC) cementum that might reflect physiological or pathological differences, such as root resorption that is physiological in deciduous teeth but can be pathological in the permanent dentition. METHODS Protein extracts from deciduous (n = 25) and permanent (n = 12) teeth were pooled (five pools of DecDC, five teeth each; four pools of PermDC, three teeth each). Samples were denatured, and proteins were extracted, reduced, alkylated, digested, and analyzed by liquid chromatography-mass spectrometry (LC-MS/MS). The beta-binomial statistical test was applied to normalized spectrum counts with 5% significance level to determine differentially expressed proteins. Immunohistochemistry was used to validate selected proteins. RESULTS A total of 510 proteins were identified: 123 (24.1%) exclusive to DecDC; 128 (25.1%) exclusive to PermDC; 259 (50.8%) commonly expressed in both DecDC and PermDC. Out of 60 differentially expressed proteins, 17 (28.3%) were detected in DecDC, including myeloperoxidase (MPO), whereas 43 (71.7%) were detected in PermDC, including decorin (DCN) and osteocalcin (BGLAP). Overall, Gene Ontology (GO) analysis indicated that all expressed proteins were related to GO biological processes that included localization and response to stress, and the GO molecular function of differentially expressed proteins was enriched in cell adhesion, molecular binding, cytoskeletal protein binding, structural molecular activity, and macromolecular complex binding. Immunohistochemistry confirmed the trends for selected differentially expressed proteins in human teeth. CONCLUSIONS Clear differences were found between the proteomes of DecDC and PermDC. These findings may lead to new insights into developmental differences between DecDC and PermDC, as well as to a better understanding of physiological/pathological events such as root resorption.
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Affiliation(s)
- Priscila A Giovani
- Department of Pediatric Dentistry, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Luciane Martins
- Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Cristiane R Salmon
- Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Luciana S Mofatto
- Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, São Paulo, Brazil
| | - Adriana F P Leme
- Brazilian Biosciences National Laboratory, LNBio, CNPEM, Campinas, São Paulo, Brazil
| | - Regina M Puppin-Rontani
- Department of Pediatric Dentistry, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Tamara N Kolli
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Brian L Foster
- Division of Biosciences, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Francisco H Nociti
- Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Kamila R Kantovitz
- Department of Pediatric Dentistry, Piracicaba Dental School, University of Campinas, São Paulo, Brazil.,Department of Dental Materials, São Leopoldo Mandic Research Center, Campinas, São Paulo, Brazil
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19
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Aitken SF, Walma DAC, Glover OD, Kear BD, Lee AE, Michel ZD, Vo TD. Early pathways to research at the NIH. J Dent Educ 2020; 85:11-15. [PMID: 32897541 DOI: 10.1002/jdd.12389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/14/2020] [Accepted: 08/15/2020] [Indexed: 11/09/2022]
Abstract
This article, written by current student trainees within various intramural programs at the National Institutes of Health (NIH), describes how the NIH experience weaves world-class interdisciplinary research into the education of future oral healthcare professionals. This article highlights 4 programs and provides perspectives from current NIH student trainees on the significance of their programs to their career growth in an effort to increase program awareness for faculty and students, thus escalating participation of predental and dental students in programs at the NIH. Although the number of individuals pursuing careers in oral health research has been alarmingly few, dentistry is in a unique position to drastically expand its collaborative scientific workforce. Research must be integrated into the training of increased numbers of future dental professionals. This article describes how NIH programs address specific needs of the dental profession, including reducing disparities, advancing evidence-based personalized medicine, and solving multidisciplinary health challenges.
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Affiliation(s)
- Sarah F Aitken
- Laboratory of Oral Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health, Bethesda, Maryland, USA
| | - David A Cruz Walma
- Cell Biology Section, National Institute of Dental and Craniofacial Research (NIDCR), National Institutes of Health, Bethesda, Maryland, USA
| | - Omar D Glover
- Laboratory of Oral Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health, Bethesda, Maryland, USA
| | - Bernice D Kear
- Laboratory of Oral Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health, Bethesda, Maryland, USA
| | - Alisa E Lee
- Developmental Glycobiology Section, National Institute of Dental and Craniofacial Research (NIDCR), National Institutes of Health, Bethesda, Maryland, USA.,Skeletal Disorders and Mineral Homeostasis Section, National Institute of Dental and Craniofacial Research (NIDCR), National Institutes of Health, Bethesda, Maryland, USA
| | - Zachary D Michel
- Skeletal Disorders and Mineral Homeostasis Section, National Institute of Dental and Craniofacial Research (NIDCR), National Institutes of Health, Bethesda, Maryland, USA
| | - Tammy D Vo
- Laboratory of Oral Connective Tissue Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health, Bethesda, Maryland, USA
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20
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Robinson JW, Blixt NC, Norton A, Mansky KC, Ye Z, Aparicio C, Wagner BM, Benton AM, Warren GL, Khosla S, Gaddy D, Suva LJ, Potter LR. Male mice with elevated C-type natriuretic peptide-dependent guanylyl cyclase-B activity have increased osteoblasts, bone mass and bone strength. Bone 2020; 135:115320. [PMID: 32179168 DOI: 10.1016/j.bone.2020.115320] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/27/2020] [Accepted: 03/12/2020] [Indexed: 02/07/2023]
Abstract
C-type natriuretic peptide (CNP) activation of guanylyl cyclase (GC)-B, also known as NPR2, stimulates cGMP synthesis and bone elongation. CNP activation requires the phosphorylation of multiple GC-B residues and dephosphorylation inactivates the receptor. GC-B7E/7E knockin mice, expressing a glutamate-substituted, "pseudophosphorylated," form of GC-B, exhibit increased CNP-dependent GC activity. Since mutations that constitutively activate GC-B in the absence of CNP result in low bone mineral density in humans, we determined the skeletal phenotype of 9-week old male GC-B7E/7E mice. Unexpectedly, GC-B7E/7E mice have significantly greater tibial and L5 vertebral trabecular bone volume fraction, tibial trabecular number, and tibial bone mineral density. Cortical cross-sectional area, cortical thickness, periosteal diameter and cortical cross-sectional moment of inertia were also significantly increased in GC-B7E/7E tibiae. Three-point bending measurements demonstrated that the mutant tibias and femurs had greater ultimate load, stiffness, energy to ultimate load, and energy to failure. No differences in microhardness indicated similar bone quality at the tissue level between the mutant and wildtype bones. Procollagen 1 N-terminal propeptide and osteocalcin were elevated in serum, and osteoblast number per bone perimeter and osteoid width per bone perimeter were elevated in tibias from the mutant mice. In contrast to mutations that constitutively activate GC-B, we report that mutations that enhance GC-B activity only in the presence of its natural ligand, increase bone mass, bone strength, and the number of active osteoblasts at the bone surface.
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Affiliation(s)
- Jerid W Robinson
- Departments of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Nicholas C Blixt
- Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN, USA
| | - Andrew Norton
- Developmental and Surgical Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Kim C Mansky
- Developmental and Surgical Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Zhou Ye
- Restorative Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Conrado Aparicio
- Restorative Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Brandon M Wagner
- Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Andrew M Benton
- Department of Physical Therapy, Georgia State University, Atlanta, GA, USA
| | - Gordon L Warren
- Department of Physical Therapy, Georgia State University, Atlanta, GA, USA
| | - Sundeep Khosla
- Robert and Arlene Kogod Center on Aging and Division of Endocrinology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Dana Gaddy
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, USA
| | - Larry J Suva
- Department of Physiology and Pharmacology, Texas A&M University, College Station, TX, USA
| | - Lincoln R Potter
- Departments of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA; Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN, USA.
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