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Boyer E, Monfort C, Lainé F, Gaudreau É, Tillaut H, Bonnaure-Mallet M, Cordier S, Meuric V, Chevrier C. Prenatal exposure to persistent organic pollutants and molar-incisor hypomineralization among 12-year-old children in the French mother-child cohort PELAGIE. ENVIRONMENTAL RESEARCH 2023; 231:116230. [PMID: 37236387 DOI: 10.1016/j.envres.2023.116230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 05/28/2023]
Abstract
BACKGROUND Exceptional episodes of exposure to high levels of persistent organic pollutants have already been associated with developmental defects of enamel among children, but knowledge is still scarce concerning the contribution of background levels of environmental contamination. METHODS Children of the French PELAGIE mother-child cohort were followed from birth, with collection of medical data and cord blood samples that were used to measure polychlorinated biphenyls (PCBs), organochlorine pesticides (OCs), and perfluorinated alkyl substances (PFASs). At 12 years of age, molar-incisor hypomineralization (MIH) and other enamel defects (EDs) were recorded for 498 children. Associations were studied using logistic regression models adjusted for potential prenatal confounders. RESULTS An increasing log-concentration of β-HCH was associated with a reduced risk of MIH and EDs (OR = 0.55; 95% CI, 0.32-0.95, and OR = 0.65; 95% CI, 0.43-0.98, respectively). Among girls, intermediate levels of p,p'-DDE were associated with a reduced risk of MIH. Among boys, we observed an increased risk of EDs in association with intermediate levels of PCB 138, PCB 153, PCB 187, and an increased risk of MIH with intermediate levels of PFOA and PFOS. CONCLUSIONS Two OCs were associated with a reduced risk of dental defects, whereas the associations between PCBs and PFASs and EDs or MIH were generally close to null or sex-specific, with an increased risk of dental defects in boys. These results suggest that POPs could impact amelogenesis. Replication of this study is required and the possible underlying mechanisms need to be explored.
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Affiliation(s)
- Emile Boyer
- INSERM, INRAE, Univ Rennes, CHU Rennes, Institut NUMECAN (Nutrition Metabolism and Cancer), F-35000, Rennes, France.
| | - Christine Monfort
- Univ Rennes, INSERM, EHESP, Irset (Institut de recherche en santé, environnement et travail), UMR_S 1085, F-35000, Rennes, France
| | | | - Éric Gaudreau
- Centre de Toxicologie Du Québec (CTQ), Institut National de Santé Publique Du Québec (INSPQ), Québec, Québec, Canada
| | - Hélène Tillaut
- Univ Rennes, INSERM, EHESP, Irset (Institut de recherche en santé, environnement et travail), UMR_S 1085, F-35000, Rennes, France
| | - Martine Bonnaure-Mallet
- INSERM, INRAE, Univ Rennes, CHU Rennes, Institut NUMECAN (Nutrition Metabolism and Cancer), F-35000, Rennes, France
| | - Sylvaine Cordier
- Univ Rennes, INSERM, EHESP, Irset (Institut de recherche en santé, environnement et travail), UMR_S 1085, F-35000, Rennes, France
| | - Vincent Meuric
- INSERM, INRAE, Univ Rennes, CHU Rennes, Institut NUMECAN (Nutrition Metabolism and Cancer), F-35000, Rennes, France
| | - Cécile Chevrier
- Univ Rennes, INSERM, EHESP, Irset (Institut de recherche en santé, environnement et travail), UMR_S 1085, F-35000, Rennes, France
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Yasuda Y. Sex Differences in Salivary Free Insulin-Like Growth Factor-1 Levels in Elderly Outpatients. Cureus 2021; 13:e17553. [PMID: 34646610 PMCID: PMC8479855 DOI: 10.7759/cureus.17553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2021] [Indexed: 11/16/2022] Open
Abstract
Objective Many studies have explored serum insulin-like growth factor (IGF)-1; however, only a few studies have investigated its presence in the saliva. Therefore, this study examined sex-based differences in salivary-free insulin-like growth factor-1 (fIGF-1), salivary growth hormone (GH), serum IGF-1 levels, and serum GH levels in older adults aged ≥60 years. The participants were further divided into <75 years and ≥75 years and examined the differences in the levels of the biomarkers mentioned above based on their sex. Design The participants were 80 regular outpatients (40 men and 40 women) with various diseases, including hypertension, diabetes, and hyperlipidemia. We randomly selected them based on the disease being treated. Men and women were divided into two groups according to age (aged <75 years or ≥75 years) for statistical analysis, including Student's t-test and Pearson's and Spearman's correlation coefficient tests. Results The analysis of sex differences in salivary fIGF-1 levels in patients aged <75 years showed significantly higher levels in women than in men. Correlation analyses of salivary fIGF-1 levels with salivary GH, serum IGF-1, and serum GH revealed a significant positive correlation of salivary fIGF-1 levels with serum IGF-1 and GH levels in men aged <75 years. In women aged ≥75 years, serum GH levels revealed a significant positive correlation with salivary GH levels and age. Conclusions The results suggested a higher possibility of the local synthesis of oral IGF-1 in women aged <75 years than in men aged <75 years.
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Affiliation(s)
- Yoshinobu Yasuda
- Internal Medicine- Gastroenterology, Yasuda Clinic, Hamamatsu, JPN
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3
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The Role of GH/IGF Axis in Dento-Alveolar Complex from Development to Aging and Therapeutics: A Narrative Review. Cells 2021; 10:cells10051181. [PMID: 34066078 PMCID: PMC8150312 DOI: 10.3390/cells10051181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/02/2021] [Accepted: 05/10/2021] [Indexed: 12/30/2022] Open
Abstract
The GH/IGF axis is a major regulator of bone formation and resorption and is essential to the achievement of normal skeleton growth and homeostasis. Beyond its key role in bone physiology, the GH/IGF axis has also major pleiotropic endocrine and autocrine/paracrine effects on mineralized tissues throughout life. This article aims to review the literature on GH, IGFs, IGF binding proteins, and their respective receptors in dental tissues, both epithelium (enamel) and mesenchyme (dentin, pulp, and tooth-supporting periodontium). The present review re-examines and refines the expression of the elements of the GH/IGF axis in oral tissues and their in vivo and in vitro mechanisms of action in different mineralizing cell types of the dento-alveolar complex including ameloblasts, odontoblasts, pulp cells, cementoblasts, periodontal ligament cells, and jaw osteoblasts focusing on cell-specific activities. Together, these data emphasize the determinant role of the GH/IGF axis in physiological and pathological development, morphometry, and aging of the teeth, the periodontium, and oral bones in humans, rodents, and other vertebrates. These advancements in oral biology have elicited an enormous interest among investigators to translate the fundamental discoveries on the GH/IGF axis into innovative strategies for targeted oral tissue therapies with local treatments, associated or not with materials, for orthodontics and the repair and regeneration of the dento-alveolar complex and oral bones.
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Musicant AM, Parag-Sharma K, Gong W, Sengupta M, Chatterjee A, Henry EC, Tsai YH, Hayward MC, Sheth S, Betancourt R, Hackman TG, Padilla RJ, Parker JS, Giudice J, Flaveny CA, Hayes DN, Amelio AL. CRTC1/MAML2 directs a PGC-1α-IGF-1 circuit that confers vulnerability to PPARγ inhibition. Cell Rep 2021; 34:108768. [PMID: 33626346 PMCID: PMC7955229 DOI: 10.1016/j.celrep.2021.108768] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 11/22/2020] [Accepted: 01/27/2021] [Indexed: 01/03/2023] Open
Abstract
Mucoepidermoid carcinoma (MEC) is a life-threatening salivary gland cancer that is driven primarily by a transcriptional coactivator fusion composed of cyclic AMP-regulated transcriptional coactivator 1 (CRTC1) and mastermind-like 2 (MAML2). The mechanisms by which the chimeric CRTC1/MAML2 (C1/M2) oncoprotein rewires gene expression programs that promote tumorigenesis remain poorly understood. Here, we show that C1/M2 induces transcriptional activation of the non-canonical peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1α) splice variant PGC-1α4, which regulates peroxisome proliferator-activated receptor gamma (PPARγ)-mediated insulin-like growth factor 1 (IGF-1) expression. This mitogenic transcriptional circuitry is consistent across cell lines and primary tumors. C1/M2-positive tumors exhibit IGF-1 pathway activation, and small-molecule drug screens reveal that tumor cells harboring the fusion gene are selectively sensitive to IGF-1 receptor (IGF-1R) inhibition. Furthermore, this dependence on autocrine regulation of IGF-1 transcription renders MEC cells susceptible to PPARγ inhibition with inverse agonists. These results yield insights into the aberrant coregulatory functions of C1/M2 and identify a specific vulnerability that can be exploited for precision therapy.
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Affiliation(s)
- Adele M Musicant
- Graduate Curriculum in Genetics and Molecular Biology, Biological and Biomedical Sciences Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Kshitij Parag-Sharma
- Graduate Curriculum in Cell Biology and Physiology, Biological and Biomedical Sciences Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Weida Gong
- Bioinformatics Core, Lineberger Comprehensive Cancer Center, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Monideepa Sengupta
- Graduate Curriculum in Pharmacological and Physiological Sciences, School of Medicine, Saint Louis University, Saint Louis, MO, USA
| | - Arindam Chatterjee
- Department of Pharmacology and Physiology, School of Medicine, Saint Louis University, Saint Louis, MO, USA
| | - Erin C Henry
- Division of Oral and Craniofacial Health Sciences, UNC Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yi-Hsuan Tsai
- Bioinformatics Core, Lineberger Comprehensive Cancer Center, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Michele C Hayward
- Lineberger Comprehensive Cancer Center, Cancer Genetics Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Siddharth Sheth
- Division of Hematology/Oncology, Department of Medicine, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Renee Betancourt
- Department of Pathology and Laboratory Medicine, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Trevor G Hackman
- Department of Otolaryngology/Head and Neck Surgery, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Ricardo J Padilla
- Division of Diagnostic Sciences, UNC Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Joel S Parker
- Lineberger Comprehensive Cancer Center, Cancer Genetics Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Genetics, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Jimena Giudice
- Department of Cell Biology and Physiology, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; McAllister Heart Institute, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Colin A Flaveny
- Department of Pharmacology and Physiology, School of Medicine, Saint Louis University, Saint Louis, MO, USA
| | - David N Hayes
- Lineberger Comprehensive Cancer Center, Cancer Genetics Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Medical Oncology, University of Tennessee Health Sciences West Cancer Center, Memphis, TN, USA
| | - Antonio L Amelio
- Division of Oral and Craniofacial Health Sciences, UNC Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Cell Biology and Physiology, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Biomedical Research Imaging Center, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Lineberger Comprehensive Cancer Center, Cancer Cell Biology Program, UNC School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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Folayan MO, Arije O, El Tantawi M, Kolawole KA, Obiyan M, Arowolo O, Oziegbe EO. Association between early childhood caries and malnutrition in a sub-urban population in Nigeria. BMC Pediatr 2019; 19:433. [PMID: 31722683 PMCID: PMC6852898 DOI: 10.1186/s12887-019-1810-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/29/2019] [Indexed: 12/22/2022] Open
Abstract
Background To determine the association between malnutrition and early childhood caries (ECC) in children resident in sub-urban, Nigeria. Methods This study was a subset of a larger cross-sectional study the data of which was generated through a household survey conducted in Ile-Ife, Nigeria. The study’s explanatory variable was malnutrition (underweight, overweight, wasting and stunting) and the outcome variable was ECC. Poisson regression analysis was used to determine the association between ECC and malnutrition. Variables (sex, frequency of sugar consumption, maternal knowledge of oral hygiene, oral hygiene status) associated with ECC in the primary study were adjusted for to obtain the adjusted prevalence ratio (APR). Results Of the 370 children, 20 (5.41%) were underweight, 20 (5.41%) were overweight, 67 (18.11%) were wasting, 120 (32.43%) were stunted and 18 (4.86%) had ECC. Factors associated with ECC were being stunted, underweight, overweight and fair oral hygiene. The prevalence of ECC was lower in children who were stunted (APR: 0.14; 95% CI: 0.03–0.69; p = 0.02), almost seven times higher in children who were overweight (APR: 6.88; 95% CI: 1.83–25.85; p < 0.001), and predictively absent in children who were underweight (APR: 0; 95% CI: 0–0; p < 0.001) when compared with children who had normal weight. Non-significant risk indicators for ECC included consuming sugar between meals three times a day or more, having low socioeconomic status and being female. Conclusions For this study population, the indicators of malnutrition – being stunted, underweight, overweight - and fair oral hygiene were risk indicators for ECC. The frequency of sugar consumption was not a significant risk indicator when malnutrition was included as an explanatory variable for ECC in the study population.
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Affiliation(s)
| | - Olujide Arije
- Institute of Public Health, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Maha El Tantawi
- Department of Preventive Dental Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | | | - Mary Obiyan
- Department of Demography and Statistics, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Olaniyi Arowolo
- Department of Child Dental Health, Obafemi Awolowo University Teaching Hospitals' Complex, Ile-Ife, Nigeria
| | - Elizabeth O Oziegbe
- Department of Child Dental Health, Obafemi Awolowo University, Ile-Ife, Nigeria
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Baccaglini L, Shuster JJ, Theriaque DW, Naveed Z. Elevated serum insulin-like growth factor 1 in recurrent aphthous stomatitis. Clin Exp Dent Res 2019; 5:269-275. [PMID: 31249708 PMCID: PMC6585871 DOI: 10.1002/cre2.181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 01/25/2023] Open
Abstract
Over 100 million Americans experience recurrent aphthous stomatitis (RAS) at some point in life. To develop targeted drugs for RAS treatment, it is critical to identify its etiology. We determined if serum insulin‐like growth factor 1 (IGF‐1) and related factors are associated with RAS, because both RAS prevalence and IGF‐1 are highest during puberty. We analyzed data from 1,480 Third National Health and Nutrition Examination Survey participants aged 20–40 years. Participants with a history of diabetes or lupus, cotinine levels 6 ng/ml or higher or glycemia 110 mg/dl or higher were excluded. We compared levels of IGF‐1, IGFBP‐3, leptin, and insulin in participants with a positive vs. negative RAS history in the prior 12 months. We used logistic regression in SAS/SUDAAN to account for the complex sampling design. The odds of a positive RAS history were 1.31 times higher for every 100 ng/ml increase in serum IGF‐1. This association persisted after adjustment for age, race/ethnicity, medication intake, body mass index, insulin, leptin, glycemia, and income (adjusted OR = 1.30, 95% CI [1.06, 1.60]; p = 0.013). The odds of a positive RAS history were also higher among non‐Hispanic white compared with non‐Hispanic black participants (adjusted OR = 4.37, 95% CI [3.00, 6.38]). Leptin, IGFBP‐3, and insulin levels did not differ by RAS status. The significantly higher IGF‐1 levels in participants with a positive RAS history compared with controls suggest a possible role of the IGF‐1 pathway in RAS etiology.
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Affiliation(s)
- Lorena Baccaglini
- Department of Epidemiology, College of Public Health University of Nebraska Medical Center Omaha Nebraska
| | - Jonathan J Shuster
- Health Outcomes and Policy, College of Medicine University of Florida Gainesville Florida
| | | | - Zaeema Naveed
- Department of Epidemiology, College of Public Health University of Nebraska Medical Center Omaha Nebraska
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Huang H, Wang J, Zhang Y, Zhu G, Li YP, Ping J, Chen W. Bone resorption deficiency affects tooth root development in RANKL mutant mice due to attenuated IGF-1 signaling in radicular odontoblasts. Bone 2018; 114:161-171. [PMID: 29292230 DOI: 10.1016/j.bone.2017.12.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/27/2017] [Accepted: 12/28/2017] [Indexed: 01/05/2023]
Abstract
The tooth root is essential for normal tooth physiological function. Studies on mice with mutations or targeted gene deletions revealed that osteoclasts (OCs) play an important role in tooth root development. However, knowledge on the cellular and molecular mechanism underlying how OCs mediate root formation is limited. During bone formation, growth factors (e.g. Insulin-like growth factor-1, IGF-1) liberated from bone matrix by osteoclastic bone resorption stimulate osteoblast differentiation. Thus, we hypothesize that OC-osteoblast coupling may also apply to OC-odontoblast coupling; therefore OCs may have a direct impact on odontoblast differentiation through the release of growth factor(s) from bone matrix, and consequently regulate tooth root formation. To test this hypothesis, we used a receptor activator of NF-κB ligand (RANKL) knockout mouse model in which OC differentiation and function was entirely blocked. We found that molar root formation and tooth eruption were defective in RANKL-/- mice. Disrupted elongation and disorganization of Hertwig's epithelial root sheath (HERS) was observed in RANKL-/- mice. Reduced expression of nuclear factor I C (NFIC), osterix, and dentin sialoprotein, markers essential for radicular (root) odontogenic cell differentiation indicated that odontoblast differentiation was disrupted in RANKL deficient mice likely contributing to the defect in root formation. Moreover, down-regulation of IGF/AKT/mTOR activity in odontoblast indicated that IGF signaling transduction in odontoblasts of the mutant mice was impaired. Treating odontoblast cells in vitro with conditioned medium from RANKL-/- OCs cultured on bone slices resulted in inhibition of odontoblast differentiation. Moreover, depletion of IGF-1 in bone resorption-conditioned medium (BRCM) from wild-type (WT) OC significantly compromised the ability of WT osteoclastic BRCM to induce odontoblast differentiation while addition of IGF-1 into RANKL-/- osteoclastic BRCM rescued impaired odontoblast differentiation, confirming that root and eruption defect in RANKL deficiency mice may result from failure of releasing of IGF-1 from bone matrix through OC bone resorption. These results suggest that OCs are important for odontoblast differentiation and tooth root formation, possibly through IGF/AKT/mTOR signaling mediated by cell-bone matrix interaction. These findings provide significant insights into regulatory mechanism of tooth root development, and also lay the foundation for root regeneration studies.
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Affiliation(s)
- Hong Huang
- The Affiliated Hospital of Stomatology, Chongqing Medical University, 5 Shangqingsi Rd, Yuzhong Qu, Chongqing Shi 400065, China; Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA
| | - Jue Wang
- Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA
| | - Yan Zhang
- The Affiliated Hospital of Stomatology, Chongqing Medical University, 5 Shangqingsi Rd, Yuzhong Qu, Chongqing Shi 400065, China; Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA
| | - Guochun Zhu
- Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA
| | - Yi-Ping Li
- Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA
| | - Ji Ping
- The Affiliated Hospital of Stomatology, Chongqing Medical University, 5 Shangqingsi Rd, Yuzhong Qu, Chongqing Shi 400065, China.
| | - Wei Chen
- Department of Pathology, School of Medicine, University of Alabama at Birmingham, 1825 University Blvd., Birmingham, AL 35294, USA.
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Aw J, Scholz GM, Huq NL, Huynh J, O'Brien-Simpson NM, Reynolds EC. Interplay betweenPorphyromonas gingivalisand EGF signalling in the regulation of CXCL14. Cell Microbiol 2018; 20:e12837. [DOI: 10.1111/cmi.12837] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 02/22/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Jiamin Aw
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
| | - Glen M. Scholz
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
| | - Noorjahan Laila Huq
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
| | - Jennifer Huynh
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
| | - Neil M. O'Brien-Simpson
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
| | - Eric C. Reynolds
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Molecular Science and Biotechnology Institute; University of Melbourne; Melbourne Victoria Australia
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Reckenbeil J, Kraus D, Stark H, Rath-Deschner B, Jäger A, Wenghoefer M, Winter J, Götz W. Insulin-like growth factor 1 (IGF1) affects proliferation and differentiation and wound healing processes in an inflammatory environment with p38 controlling early osteoblast differentiation in periodontal ligament cells. Arch Oral Biol 2017; 73:142-150. [DOI: 10.1016/j.archoralbio.2016.10.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 08/31/2016] [Accepted: 10/11/2016] [Indexed: 12/21/2022]
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10
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Paszynska E, Dmitrzak-Weglarz M, Slopien A, Tyszkiewicz-Nwafor M, Rajewski A. Salivary and serum insulin-like growth factor (IGF-1) assays in anorexic patients. World J Biol Psychiatry 2016; 17:615-621. [PMID: 25865291 DOI: 10.3109/15622975.2015.1023356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES The purpose of this study was to measure the salivary and serum free IGF-1 concentration of patients with anorexia nervosa (AN) in comparison to an average population. METHODS A controlled clinical trial was designed for an age- and gender-matched group of 121 AN patients and 77 healthy individuals. A clinical examination was made and blood and salivary samples were taken during the acute stage of AN (BMI < 15 kg/m2) in the first week of hospitalization. An enzyme immunoassay (ELISA) suitable for measuring free IGF-1 was used. RESULTS Anorexic patients had significant reductions in salivary unstimulated flow rate (UFR), pH and free IGF-1 levels in their saliva and serum. Significant correlations between serum IGF-1 and BMI; salivary IGF-1 and UFR and pH were detected. CONCLUSIONS Salivary and serum IGF-1 analyses appear to be a reliable biochemical indicator of malnutrition in AN patients. Measurement of salivary IGF-1 levels would allow new perspectives in monitoring AN in its early stages.
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Affiliation(s)
- Elzbieta Paszynska
- a Department of Biomaterials and Experimental Dentistry , Poznan University of Medical Sciences , Poznan , Poland
| | - Monika Dmitrzak-Weglarz
- b Psychiatric Genetics Unit, Department of Psychiatry , Poznan University of Medical Sciences , Poznan , Poland
| | - Agnieszka Slopien
- c Department of Child and Adolescent Psychiatry , Poznan University of Medical Sciences , Poznan , Poland
| | - Marta Tyszkiewicz-Nwafor
- c Department of Child and Adolescent Psychiatry , Poznan University of Medical Sciences , Poznan , Poland
| | - Andrzej Rajewski
- c Department of Child and Adolescent Psychiatry , Poznan University of Medical Sciences , Poznan , Poland
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Ahi EP. Signalling pathways in trophic skeletal development and morphogenesis: Insights from studies on teleost fish. Dev Biol 2016; 420:11-31. [PMID: 27713057 DOI: 10.1016/j.ydbio.2016.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022]
Abstract
During the development of the vertebrate feeding apparatus, a variety of complicated cellular and molecular processes participate in the formation and integration of individual skeletal elements. The molecular mechanisms regulating the formation of skeletal primordia and their development into specific morphological structures are tightly controlled by a set of interconnected signalling pathways. Some of these pathways, such as Bmp, Hedgehog, Notch and Wnt, are long known for their pivotal roles in craniofacial skeletogenesis. Studies addressing the functional details of their components and downstream targets, the mechanisms of their interactions with other signals as well as their potential roles in adaptive morphological divergence, are currently attracting considerable attention. An increasing number of signalling pathways that had previously been described in different biological contexts have been shown to be important in the regulation of jaw skeletal development and morphogenesis. In this review, I provide an overview of signalling pathways involved in trophic skeletogenesis emphasizing studies of the most species-rich group of vertebrates, the teleost fish, which through their evolutionary history have undergone repeated episodes of spectacular trophic diversification.
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Affiliation(s)
- Ehsan Pashay Ahi
- Institute of Zoology, University of Graz, Universitätsplatz 2, A-8010 Graz, Austria; Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland.
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12
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Yamamoto T, Oida S, Inage T. Gene Expression and Localization of Insulin-like Growth Factors and Their Receptors throughout Amelogenesis in Rat Incisors. J Histochem Cytochem 2016; 54:243-52. [PMID: 16260589 DOI: 10.1369/jhc.5a6821.2005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Insulin-like growth factors (IGFs) are expressed in many tissues and control cell differentiation, proliferation, and apoptosis. In teeth, the temporo-spatial pattern of expression IGFs and their receptors has not been fully characterized. The purpose of this study was to obtain a comprehensive profile of their expression throughout the life cycle of ameloblasts, using the continuously erupting rat incisor model. Upper incisors of young male rats were fixed by perfusion, decalcified, and embedded in paraffin. Sections were processed for in situ hybridization and immunohistochemistry. mRNA and protein expression profiles IGF-I, IGF-II, IGF-IR, and IGF-IIR mRNA were essentially identical. At the apical loop of the incisor, very strong signals were seen in the outer enamel epithelium while the inner enamel epithelium showed a moderate reaction. In the region of ameloblasts facing pulp, inner enamel epithelium cells were still moderately reactive while signals over the outer enamel epithelium were slightly reduced. In the region of ameloblasts facing dentin and the initial portion of the secretory zone, signals in ameloblasts were weak while those over the outer enamel epithelium were strong. In the region of postsecretory transition, signals in both ameloblasts and papillary layer cells gradually increased. In maturation proper, signals in ameloblasts appeared as alternating bands of strong and weak reactivities, which corresponded to the regions of ruffle-ended and smooth-ended ameloblasts, respectively. Papillary layer cells also showed alternations in signal intensity that matched those in ameloblasts. These results suggest that the IGF family may act as an autocrine/paracrine system that influences not only cell differentiation but also the physiological activity of ameloblasts.
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Affiliation(s)
- Tatsuya Yamamoto
- Department of Anatomy, School of Dentistry, Nihon University, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, Japan.
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Zhou Y, Chen HIH, Lin A, Dang H, Haack K, Cole SA, Huang Y, Yu H, Chen Y, Yeh CK. Early gene expression in salivary gland after isoproterenol treatment. J Cell Biochem 2015; 116:431-7. [PMID: 25336019 PMCID: PMC4620551 DOI: 10.1002/jcb.24995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 10/14/2014] [Indexed: 12/27/2022]
Abstract
Isoproterenol, a β-adrenergic agonist, has been shown to induce salivary gland hyperplasia. However, the mechanism involved in this pharmacological phenomenon is not well understood. To gain a better understanding of the underlying changes, including genes, networks and pathways altered by isoproterenol, microarray-based gene expression analysis was conducted on rat parotid glands at 10, 30, and 60 min after isoproterenol injection. After isoproterenol treatment, the number of differentially expressed genes was increased in a time-dependent manner. Pathway analysis showed that cell hyperplasia, p38(MAPK), and IGF-1 were the most altered function, network and pathway, respectively. The balanced regulation of up- and down-expression of genes related to cell proliferation/survival may provide a better understanding of the mechanism of isoproterenol-induced parotid gland enlargement without tumor transformation.
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Affiliation(s)
- Yi Zhou
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
- Affiliated Hospital of Stomatology, Medical College, Zhejiang University, Hangzhou, P.R. China 310000
| | - Hung-I H. Chen
- Greehey Children’s Cancer Research Institute, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229-3309, USA
| | - A.L. Lin
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - H. Dang
- Developmental Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Karin Haack
- Texas Biomedical Research Institute, San Antonio, TX 78245-0549, USA
| | - Shelley A. Cole
- Texas Biomedical Research Institute, San Antonio, TX 78245-0549, USA
| | - Yufei Huang
- Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Haiyang Yu
- West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China 610041
| | - Yidong Chen
- Department of Epidemiology & Biostatistics, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
- Greehey Children’s Cancer Research Institute, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229-3309, USA
| | - Chih-Ko Yeh
- Department of Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
- Geriatric Research, Education & Clinical Center, Audie L. Murphy Division, South Texas Veterans Health Care System, San Antonio, TX 78229-4404 USA
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High Molecular Complexes of Insulin-Like Growth Factor-I in Human Saliva. Int J Pept Res Ther 2014. [DOI: 10.1007/s10989-014-9408-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Vandomme J, Touil Y, Ostyn P, Olejnik C, Flamenco P, El Machhour R, Segard P, Masselot B, Bailliez Y, Formstecher P, Polakowska R. Insulin-like growth factor 1 receptor and p38 mitogen-activated protein kinase signals inversely regulate signal transducer and activator of transcription 3 activity to control human dental pulp stem cell quiescence, propagation, and differentiation. Stem Cells Dev 2014; 23:839-51. [PMID: 24266654 DOI: 10.1089/scd.2013.0400] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Dental pulp stem cells (DPSCs) remain quiescent until activated in response to severe dental pulp damage. Once activated, they exit quiescence and enter regenerative odontogenesis, producing reparative dentin. The factors and signaling molecules that control the quiescence/activation and commitment to differentiation of human DPSCs are not known. In this study, we determined that the inhibition of insulin-like growth factor 1 receptor (IGF-1R) and p38 mitogen-activated protein kinase (p38 MAPK) signaling commonly activates DPSCs and promotes their exit from the G0 phase of the cell cycle as well as from the pyronin Y(low) stem cell compartment. The inhibition of these two pathways, however, inversely determines DPSC fate. In contrast to p38 MAPK inhibitors, IGF-1R inhibitors enhance dental pulp cell sphere-forming capacity and reduce the cells' colony-forming capacity without inducing cell death. The inverse cellular changes initiated by IGF-1R and p38 MAPK inhibitors were accompanied by inverse changes in the levels of active signal transducer and activator of transcription 3 (STAT3) factor, inactive glycogen synthase kinase 3, and matrix extracellular phosphoglycoprotein, a marker of early odontoblast differentiation. Our data suggest that there is cross talk between the IGF-1R and p38 MAPK signaling pathways in DPSCs and that the signals provided by these pathways converge at STAT3 and inversely regulate its activity to maintain quiescence or to promote self-renewal and differentiation of the cells. We propose a working model that explains the possible interactions between IGF-1R and p38 MAPK at the molecular level and describes the cellular consequences of these interactions. This model may inspire further fundamental study and stimulate research on the clinical applications of DPSC in cellular therapy and tissue regeneration.
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Affiliation(s)
- Jerome Vandomme
- 1 Inserm U837 Jean-Pierre Aubert Research Center, Institut pour la Recherche sur le Cancer de Lille (IRCL) , Lille, France
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Konermann A, Lossdörfer S, Jäger A, Chen Y, Götz W. Autoregulation of insulin-like growth factor 2 and insulin-like growth factor-binding protein 6 in periodontal ligament cells in vitro. Ann Anat 2013; 195:527-32. [DOI: 10.1016/j.aanat.2013.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 10/02/2013] [Accepted: 10/04/2013] [Indexed: 11/26/2022]
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Singh N, Ranjan V, Zaidi D, Shyam H, Singh A, Lodha D, Sharma R, Verma U, Dixit J, Balapure AK. Insulin catalyzes the curcumin-induced wound healing: an in vitro model for gingival repair. Indian J Pharmacol 2013; 44:458-62. [PMID: 23087505 PMCID: PMC3469947 DOI: 10.4103/0253-7613.99304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 08/26/2011] [Accepted: 04/30/2012] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES Human gingival fibroblasts (hGFs) play a major role in the maintenance and repair of gingival connective tissue. The mitogen insulin with IGFs etc. synergizes in facilitating wound repair. Although curcumin (CUR) and insulin regulate apoptosis, their impact as a combination on hGF in wound repair remains unknown. Our study consists of: 1) analysis of insulin-mediated mitogenesis on CUR-treated hGF cells, and 2) development of an in vitro model of wound healing. MATERIALS AND METHODS Apoptotic rate in CUR-treated hGF cells with and without insulin was observed by AnnexinV/PI staining, nuclear morphological analysis, FACS and DNA fragmentation studies. Using hGF confluent cultures, wounds were mechanically created in vitro and incubated with the ligands for 48 h in 0.2% fetal bovine serum DMEM. RESULTS CUR alone showed dose-dependent (1-50 μM) effects on hGF. Insulin (1 μg/ml) supplementation substantially enhanced cell survival through up-regulation of mitogenesis/anti-apoptotic elements. CONCLUSIONS The in vitro model for gingival wound healing establishes that insulin significantly enhanced wound filling faster than CUR-treated hGF cells over 48 h. This reinforces the pivotal role of insulin in supporting CUR-mediated wound repair. The findings have significant bearing in metabolic dysfunctions, e.g. diabetes, atherosclerosis, etc., especially under Indian situations.
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Affiliation(s)
- Neetu Singh
- Tissue and Cell Culture Unit, Central Drug Research Institute, Lucknow, India
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Gosau M, Götz W, Felthaus O, Ettl T, Jäger A, Morsczeck C. Comparison of the differentiation potential of neural crest derived progenitor cells from apical papilla (dNC-PCs) and stem cells from exfoliated deciduous teeth (SHED) into mineralising cells. Arch Oral Biol 2012; 58:699-706. [PMID: 23261253 DOI: 10.1016/j.archoralbio.2012.11.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 11/05/2012] [Accepted: 11/07/2012] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Recently, cells from the apical papilla of retained human third molars (dental neural crest-derived progenitor cells, dNC-PCs) have been isolated and characterised as multipotent progenitor cells. Nonetheless, molecular processes during differentiation into mineralising cells are still unknown. This study evaluated the osteogenic/odontogenic differentiation of dNC-PCs under in vitro conditions and compared these cells with already known odontoblast precursor cells (dental stem cells from exfoliated human deciduous teeth, SHED). METHODS The differentiation of dNC-PCs and SHED under in vitro conditions was verified by Alizarin red staining (mineralisation), alkaline phosphatase activity and the expression of osteogenic/odontogenic markers (RT-PCRs). The genome wide expression-profiles were investigated with Affymetrix DNA-microarrays and the cell migration with a gel spot cell migration assay. RESULTS In our study dNC-PCs differentiated like SHED in mineralising cells. The expression of odontoblast markers suggested that dNC-PCs and SHED differentiated into different types of odontoblasts. This supposition was supported by genome wide gene expression profiles of dNC-PCs and SHED after cell differentiation. Typical biological processes of undifferentiated cells, for example "mitosis", were regulated in dNC-PCs. In SHED biological processes like "response to wounding" or "cell migration" were regulated, which are associated with replacement odontoblasts and their precursors. Moreover, a gel-spot assay revealed that SHED migrated faster than dNC-PCs. CONCLUSION Our results suggest that dNC-PCs are precursors for primary odontoblasts, whereas SHED differentiate into replacement odontoblasts. These different odontogenic differentiation potentials of dNC-PCs and SHED have to be considered for cellular therapies and tissue engineering approaches in the future.
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Affiliation(s)
- Martin Gosau
- Department of Cranio- and Maxillofacial Surgery, University Hospital Regensburg, Germany.
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Harb AN, Holtfreter B, Friedrich N, Wallaschofski H, Nauck M, Albers M, Meisel P, Biffar R, Kocher T. Association between the insulin-like growth factor axis in serum and periodontitis in the Study of Health in Pomerania: an exploratory study. J Clin Periodontol 2012; 39:931-9. [PMID: 22882716 DOI: 10.1111/j.1600-051x.2012.01935.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2012] [Indexed: 12/17/2022]
Abstract
AIM To evaluate the association of Insulin-like Growth Factor (IGF) I-related variables with periodontitis in the population-based Study of Health in Pomerania (SHIP). MATERIAL AND METHODS From the cross-sectional SHIP, 2293 subjects with clinical attachment loss (CAL) data and 2398 subjects with tooth count data aged 20-59 years were analysed. Serum IGF-I and IGF-binding protein (BP)-3 levels were determined by chemiluminescence immunoassays. Linear and logistic regressions with fractional polynomials were used to study associations between IGF-related variables and mean CAL or high tooth loss. For non-linear relations between IGFBP-3 and mean CAL, graphical presentations of fractional polynomials were used to deduce knots for linear splines. RESULTS In fully adjusted models, for serum IGFBP-3 values ≤1200 ng/ml, mean CAL increased significantly for decreasing serum IGFBP-3 levels [B = -0.027 (95% CI, -0.049; -0.005), p = 0.02]. The odds for high tooth loss decreased significantly for high serum IGFBP-3 values [OR = 0.97 (0.95; 0.99), p = 0.02]. Serum IGF-I levels and the IGF-I/IGFBP-3 ratio were not related to mean CAL or tooth loss after full adjustment. CONCLUSIONS Low serum IGFBP-3 levels might be associated with higher levels of periodontal disease. Neither serum IGF-I nor IGF-I/IGFBP-3 ratios were associated with periodontitis.
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Affiliation(s)
- Ali N Harb
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology and Endodontology, Dental school, University Medicine, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
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Wang S, Mu J, Fan Z, Yu Y, Yan M, Lei G, Tang C, Wang Z, Zheng Y, Yu J, Zhang G. Insulin-like growth factor 1 can promote the osteogenic differentiation and osteogenesis of stem cells from apical papilla. Stem Cell Res 2012; 8:346-56. [PMID: 22286010 DOI: 10.1016/j.scr.2011.12.005] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 12/07/2011] [Accepted: 12/12/2011] [Indexed: 01/09/2023] Open
Abstract
Insulin-like growth factor 1 (IGF-1) plays an important role in the regulation of tooth root development, and stem cells from apical papilla (SCAPs) are responsible for the formation of root pulp and dentin. To date, it remains unclear whether IGF-1 can regulate the function of SCAPs. In this study, SCAPs were isolated and purified from human immature root apex, and stimulated by 100 ng/mL exogenous IGF-1. The effects of IGF-1 on the proliferation and differentiation of SCAPs were subsequently investigated. IGF-1 treated SCAPs presented the morphological and ultrastructural changes. Cell proliferation, alkaline phosphatase (ALP) activity and mineralization capacity of SCAPs were increased by IGF-1. Western blot and quantitative RT-PCR analyses further demonstrated that the expression of osteogenic-related proteins and genes (e.g., alkaline phosphatase, runt-related transcription factor 2, osterix, and osteocalcin) was significantly up-regulated in IGF-1 treated SCAPs, whereas the expression of odontoblast-specific markers (e.g., dentin sialoprotein and dentin sialophosphoprotein) was down-regulated by IGF-1. In vivo results revealed that IGF-1 treated SCAPs mostly gave birth to bone-like tissues while untreated SCAPs mainly generated dentin-pulp complex-like structures after transplantation. The present study revealed that IGF-1 can promote the osteogenic differentiation and osteogenesis capacity of SCAPs, but weaken their odontogenic differentiation and dentinogenesis capability, indicating that IGF-1 treated SCAPs can be used as a potential candidate for bone tissue engineering.
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Affiliation(s)
- Sainan Wang
- Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu 210029, China
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Matsumoto A, Harada H, Saito M, Taniguchi A. Induction of insulin-like growth factor 2 expression in a mesenchymal cell line co-cultured with an ameloblast cell line. In Vitro Cell Dev Biol Anim 2011; 47:675-80. [PMID: 21959847 PMCID: PMC3208818 DOI: 10.1007/s11626-011-9456-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 09/09/2011] [Indexed: 11/30/2022]
Abstract
Various growth factors have been implicated in the regulation of cell proliferation and differentiation during tooth development. It has been unclear if insulin-like growth factors (IGFs) participate in the epithelium–mesenchyme interactions of tooth development. We previously produced three-dimensional sandwich co-culture systems (SW) containing a collagen membrane that induce the differentiation of epithelial cells. In the present study, we used the SW system to analyze the expression of IGFs and IGFRs. We demonstrate that IGF2 expression in mesenchymal cells was increased by SW. IGF1R transduces a signal; however, IGF2R does not transduce a signal. Recombinant IGF2 induces IGF1R and IGF2R expression in epithelial cells. IGF1R expression is increased by SW; however, IGF2R expression did not increase by SW. Thus, IGF2 signaling works effectively in SW. These results suggest that IGF signaling acts through the collagen membrane on the interaction between the epithelium and mesenchyme. In SW, other cytokines may be suppressed to induce IGF2R induction. Our results suggest that IGF2 may play a role in tooth differentiation.
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Affiliation(s)
- Asako Matsumoto
- Cell-Materials Interaction Group, Biomaterials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 Japan
- Biomaterials and Tissue Engineering, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki 305-8572 Japan
- Kyokuto Pharmaceutical Industrial Co., Ltd., 3333-26 Aza-Asayama, Kamitezuna, Takahagi-shi, Ibaraki 318-0004 Japan
| | - Hidemitsu Harada
- Department of Oral Structure and Function Biology, Iwate Medical University, School of Dentistry, 1-3-27 Chuodori, Morioka, Iwate 020-8505 Japan
| | - Masahiro Saito
- Tissue Engineering Research Center, Tokyo University of Science, Noda, Chiba 278-8510 Japan
| | - Akiyoshi Taniguchi
- Cell-Materials Interaction Group, Biomaterials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 Japan
- Biomaterials and Tissue Engineering, Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki 305-8572 Japan
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Lossdörfer S, Abuduwali N, Jäger A. Bone Morphogenetic Protein-7 Modifies the Effects of Insulin-Like Growth Factors and Intermittent Parathyroid Hormone (1-34) on Human Periodontal Ligament Cell Physiology In Vitro. J Periodontol 2011; 82:900-8. [DOI: 10.1902/jop.2010.100572] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Bánhegyi RJ, Rus-Gal PO, Nagy AK, Martyin T, Wágner R, Varga R, Pikó B. [Antidiabetic therapy--a new possibility in the complex therapy of cancer?]. Magy Onkol 2010; 54:315-23. [PMID: 21163762 DOI: 10.1556/monkol.54.2010.4.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Nowadays the lack of exercise and improper eating habits are main characteristics of modern life style. This favors not only formation of type 2 diabetes or cardiovascular diseases, but also increaseas the incidence and prevalence of malignant tumors. Today there are many epidemiologic trials that demonstrate the connection between type 2 diabetes and formation of several malignomas. Its cause should be searched in common paths of pathologic processes. One of this is the birth of hyperinsulinsulinemia, which accompanies insulin resistance. Hyperinsulinemia of the host leads to increased glucose uptake in the highly insuline sensitive tumor cells which supports tumor growth. This makes type 2 diabetes a metabolic state favoring tumor formation, suggesting a potential application of oral insulin sensitizers in cancer therapy. Currently several international trials are testing the anti-tumor activity of metformin and thiazolidinedions (TZD). Besides this, encouraging results were obtained with the use of anti-IGFR antibodies in the treatment of tumors. A common therapy of diabetes and tumor may lead to new possibilities in the treatment of malignant tumor diseases. By doing this we could be able to weaken the tumor and strengthen the body, enabling it to fight against cancer. Bánhegyi RJ, Rus-Gal PO, Nagy AK, Martyin T, Varga R, Pikó B. Correlation between type 2 diabetes and malignant tumors - new possibilities in the complex therapy of cancers?
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Affiliation(s)
- Róbert János Bánhegyi
- Békés Megyei Képviselőtestület Pándy Kálmán Kórháza Megyei Onkológiai Központ 5700 Gyula Semmelweis u. 1.
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Takenouchi Y, Ohshima M, Yamaguchi Y, Nishida T, Senda N, Idesawa M, Otsuka K, Ito K. Insulin-like growth factor-binding protein-2 and -3 in gingival crevicular fluid. J Periodontal Res 2010; 45:803-8. [PMID: 20860589 DOI: 10.1111/j.1600-0765.2010.01309.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND OBJECTIVE Insulin-like growth factor-binding proteins (IGFBPs) are crucial regulators of insulin-like growth factor (IGF). They enhance or inhibit IGF functions, but also exhibit IGF-independent effects. In a previous study, we detected, qualitatively, IGFBP-2 and -3 in gingival crevicular fluid using a cytokine antibody array. Here we extended these results using an ELISA to determine the concentrations of IGFBP-2 and -3 in gingival crevicular fluid. In addition, we explored whether the expression of IGFBP-2 and IGFBP-3 correlates with periodontal disease severity. MATERIAL AND METHODS Gingival crevicular fluid samples from 92 sites of 12 patients affected with periodontal disease and from 100 sites of 19 healthy volunteers, were collected, divided into two groups and analyzed by ELISA for IGFBP-2 and -3 expression. The potential correlation among probing depth, gingival index and the concentrations of IGFBP-2 and -3 was analyzed. RESULTS Positive correlations were observed between the concentration of IGFBP-2 and probing depth and gingival index, but not for IGFBP-3. The IGFBP-2 concentrations at bleeding on probing-positive sites and at sites with a probing depth of ≥ 4 mm were higher than at bleeding on probing-negative sites and at sites with a probing depth of ≤ 3 mm. CONCLUSION These results indicate that IGFBP-2 is a potential novel marker for periodontal disease progression. As IGFBP-2 modulates bone metabolism and cell migration, IGFBP-2 in the gingival crevicular fluid may reflect periodontal disease activity.
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Affiliation(s)
- Y Takenouchi
- Department of Periodontology, Nihon University School of Dentistry, Tokyo, Japan
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Simões A, de Oliveira E, Campos L, Nicolau J. Ionic and histological studies of salivary glands in rats with diabetes and their glycemic state after laser irradiation. Photomed Laser Surg 2010; 27:877-83. [PMID: 19715430 DOI: 10.1089/pho.2008.2452] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVES To evaluate the effect of laser irradiation (LI) on the glycemic state and the histological and ionic parameters of the parotid and submandibular glands in rats with diabetes. METHODS One hundred twenty female rats were divided into eight groups. Diabetes was induced by administration of streptozotocin and confirmed later according to results of glycemia testing. Twenty-nine days after the induction, the parotid and submandibular glands of the rats were irradiated with 5, 10, and 20 J/cm2 using a laser diode (660 nm/100 mW) (without diabetes: C5, C10, and C20; with diabetes: D5, D10, and D20, respectively). On the following day, the rats were euthanized, and blood glucose determined. Histological and ionic analyses were performed. RESULTS Rats with diabetes without irradiation (D0) showed lipid droplets accumulation in the parotid gland, but accumulation decreased after 5, 10, and 20 J/cm2 of laser irradiation. A decrease in fasting glycemia level from 358.97+/-56.70 to 278.33+/-87.98 mg/dL for D5 and from 409.50+/-124.41 to 231.80+/-120.18 mg/dL for D20 (p<0.05) was also observed. CONCLUSION LI should be explored as an auxiliary therapy for control of complications of diabetes because it can alter the carbohydrate and lipid metabolism of rats with diabetes.
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Affiliation(s)
- Alyne Simões
- Dental Materials Department, Oral Biology Research Center, School of Dentistry, University of São Paulo, São Paulo, Brazil.
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IGF-I, IGF-IR and IRS1 expression as an early reaction of PDL cells to experimental tooth movement in the rat. Arch Oral Biol 2010; 55:215-22. [DOI: 10.1016/j.archoralbio.2010.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 12/30/2009] [Accepted: 01/06/2010] [Indexed: 01/06/2023]
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Physiological Role of a Subtilisin-like Proprotein Convertase, PACE4, in Submandibular Gland Development. J Oral Biosci 2010. [DOI: 10.1016/s1349-0079(10)80036-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Regulatory effects of biomechanical strain on the insulin-like growth factor system in human periodontal cells. J Biomech 2009; 42:2584-9. [DOI: 10.1016/j.jbiomech.2009.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Revised: 06/22/2009] [Accepted: 07/03/2009] [Indexed: 11/20/2022]
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The use of platelet-rich plasma in bone reconstruction therapy. Biomaterials 2009; 30:4956-66. [PMID: 19573909 DOI: 10.1016/j.biomaterials.2009.05.055] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Accepted: 05/25/2009] [Indexed: 02/08/2023]
Abstract
The use of platelet-rich plasma (PRP) in bone reconstruction therapy was introduced in the late 1990s. Since then, many scientists and clinicians have employed it in orthopaedic and oral surgeries. Unfortunately, studies that analyze the use of PRP are somewhat controversial as some conclude that the use of PRP may favor bone regeneration and others conclude that the use of PRP is irrelevant. By listing and analyzing the biological effect that each factor released by the activated platelets can have in bone regeneration, the present review answers the question of why PRP may be useful in bone reconstruction therapy. Subsequently, by examining the studies that have both successfully and unsuccessfully utilized PRP, it suggests how PRP might be used in order to achieve successful results in orthopaedic and dental bone reconstruction surgeries.
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Caviedes-Bucheli J, Canales-Sánchez P, Castrillón-Sarria N, Jovel-Garcia J, Alvarez-Vásquez J, Rivero C, Azuero-Holguín MM, Diaz E, Munoz HR. Expression of insulin-like growth factor-1 and proliferating cell nuclear antigen in human pulp cells of teeth with complete and incomplete root development. Int Endod J 2009; 42:686-93. [PMID: 19467045 DOI: 10.1111/j.1365-2591.2009.01568.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
AIM To quantify the expression of insulin-like growth factor-1 (IGF-1) and proliferating cell nuclear antigen (PCNA) in human pulp cells of teeth with complete or incomplete root development, to support the specific role of IGF-1 in cell proliferation during tooth development and pulp reparative processes. METHODOLOGY Twenty six pulp samples were obtained from freshly extracted human third molars, equally divided in two groups according to root development stage (complete or incomplete root development). All samples were processed and immunostained to determine the expression of IGF-1 and PCNA in pulp cells. Sections were observed with a light microscope at 80x and morphometric analyses were performed to calculate the area of PCNA and IGF-1 immunostaining using digital image software. Mann-Whitney's test was used to determine statistically significant differences between groups (P < 0.05) for each peptide and the co-expression of both. RESULTS Expression of IGF-1 and PCNA was observed in all human pulp samples with a statistically significant higher expression in cells of pulps having complete root development (P = 0.0009). CONCLUSION Insulin-like growth factor-1 and PCNA are expressed in human pulp cells, with a significant greater expression in pulp cells of teeth having complete root development.
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Affiliation(s)
- J Caviedes-Bucheli
- Postgraduate Endodontic Department, School of Dentistry, Pontificia Universidad Javeriana, Bogota, Colombia.
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Antonelli G, Gatti R, Prearo M, De Palo EF. Salivary free insulin-like growth factor-i levels: effects of an acute physical exercise in athletes. J Endocrinol Invest 2009; 32:1-5. [PMID: 19337006 DOI: 10.1007/bf03345669] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND/AIMS The offer of human saliva IGF-I (sIGF-I) measurement in athletes investigation is a new proposal. The aim was to investigate the physical exercise effect on sIGF-I and explore plasma free IGF-I relation. MATERIALS AND METHODS Saliva and blood were collected from well-trained athletes, investigated immediately before and at the end of a physical exercise test. RESULTS sIGF-I was significantly increased at the end of the physical exercise. The plasma free IGF-I concentrations did not demonstrate any difference. The saliva total protein level (sTP) was also significantly increased. A positive correlation between sTP and sIGF-I, was observed, both before and after physical exercise, and between salivary and plasma free IGF-I only after physical exercise. The salivary free IGF-I level significantly increased after physical exercise, moreover a correlation with the plasma levels exists in post-exercise condition. CONCLUSION The physical exercise affects sIGF-I as well as the sTP. The correlation between plasma and salivary free IGF-I levels only in post-exercise condition suggests further studies to investigate the effects of different type and duration of physical exercise. The comparison with other salivary biochemical parameter investigation would also further increase comprehension on the role of salivary IGF-I.
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Affiliation(s)
- G Antonelli
- Section of Clinical Biochemistry, Department of Medical Diagnostic Sciences and Sp. Ther, University of Padua, 35121 Padua, Italy
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Inhibition and transcriptional silencing of a subtilisin-like proprotein convertase, PACE4/SPC4, reduces the branching morphogenesis of and AQP5 expression in rat embryonic submandibular gland. Dev Biol 2009; 325:434-43. [DOI: 10.1016/j.ydbio.2008.10.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 10/03/2008] [Accepted: 10/03/2008] [Indexed: 12/16/2022]
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Brady G, Crean SJ, Lorenzon A, Kapas S. IGF-I protects human oral buccal mucosal epithelial cells from sodium nitroprusside-induced apoptosis via PI3-kinase. Growth Horm IGF Res 2008; 18:298-306. [PMID: 18269934 DOI: 10.1016/j.ghir.2007.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Revised: 10/31/2007] [Accepted: 11/13/2007] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Cancers of the head and neck account for the vast majority of all malignancies of the oral cavity. The insulin-like growth factor (IGF) family of proteins is well documented to have an important role in rescuing cells from apoptosis. While it is known the IGF proteins are present in normal oral epithelial and cancer cells its role is not fully understood. Our aim was to study the ability of IGFs to rescue sodium nitroprusside (SNP)-induced apoptotic normal oral epithelial cells in vitro. DESIGN Cultured normal human oral keratinocytes (NOKs) or epithelial cells were used. Apoptosis was induced by SNP then cells were exposed to IGF-I or IGF-II to rescue them. Cell viability was assessed by ELISA (for cell death and caspase 3) and FACS analysis; post receptor effects of IGF-I or IGF-II were assessed by [(3)H] thymidine incorporation. Cell signaling events were measured by western blotting using antibodies against phosphorylated Akt or p42/p44 MAPK, and measuring PI3-K activity by ELISA. RESULTS SNP induced apoptosis of NOKs and activated the PI3-K/Akt survival pathway. Exposing cells to IGF proteins prevented their apoptosis. IGF-I and -II caused significant increases in PI3-K, but not MAPK, activity. SNP and LY294002, a PI3-K inhibitor, both caused a significant rise in caspase 3 release from NOKs which was reduced in the presence of IGFs. CONCLUSIONS The data establishes the importance of IGF-activated PI3-K in rescuing cells from apoptosis. It lends further evidence to the significance of IGF proteins in the possible development of oral cancer.
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Affiliation(s)
- Garrett Brady
- Maxillofacial Department, Leeds Dental Institute, Clarendon Way, Leeds LS2 9LU, UK.
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Hung PS, Kao SY, Liu CJ, Tu HF, Wu CH, Lin SC. Insulin-like growth factor binding protein-5 enhances the migration and differentiation of gingival epithelial cells. J Periodontal Res 2008; 43:673-80. [PMID: 18624948 DOI: 10.1111/j.1600-0765.2007.01070.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVE The objective was to define the roles of insulin-like growth factor binding protein-5 (IGFBP-5) in gingival epithelial cells (GEC). Human IGFBP-5 is expressed in many cell types and has diverse biological functions. It stimulates the growth of bone cells and is associated with the impedance of gingival fibroblast apoptosis. In gingival epithelium, IGFBP-5 is expressed in the cells of the differentiated stratum spinosum layer. MATERIAL AND METHODS Recombinant IGFBP-5 protein treatment and knockdown of IGFBP-5 expression using a lentivirus-delivered short hairpin RNA was carried out in human GEC. Proliferation, apoptosis, anoikis, migration, differentiation and gene expression in GEC were analyzed and molecular images were obtained. RESULTS The IGFBP-5 had no effect on proliferation, but it slightly suppressed apoptosis and anoikis of GEC. It also induced GEC migration and upregulated the expression of involucrin, transglutaminase-1, keratin and focal adhesion kinase. The IGFBP-5 induced migration partly via an insulin-like growth factor-independent mechanism. The knockdown of IGFBP-5 downregulated the expression of involucrin, transglutaminase-1 and focal adhesion kinase. CONCLUSION Expression of IGFBP-5 in GEC is associated with anti-apoptosis, migration and differentiation of GEC. These phenotypic effects may be associated with focal adhesion kinase and are advantageous for re-epithelization of GEC and the maintenance of gingival health.
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Affiliation(s)
- P-S Hung
- Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei, Taiwan
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Von den Hoff JW, Delatte M. Interplay of mechanical loading and growth factors in the mandibular condyle. Arch Oral Biol 2008; 53:709-15. [PMID: 18395696 DOI: 10.1016/j.archoralbio.2008.03.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Revised: 02/21/2008] [Accepted: 03/01/2008] [Indexed: 10/22/2022]
Abstract
The mandibular condyle is an important growth site in the developing mandible. The growth of the condyle is known to be highly adaptable to functional factors. This property is exploited in orthodontics for the treatment of class II malocclusions and mandibular asymmetries. However, there is an ongoing debate on the efficacy of functional appliances. The comparison of experimental studies is complicated by the lack of detailed analyses of the load distribution within the condyle. In spite of this, there is a large body of evidence showing that mechanical manipulation of the condyle induces metabolic changes, and changes in the expression of growth factors and other signalling molecules. This review aims to give an overview of the role of growth factors in the condyle with special emphasis on their responsiveness to mechanical perturbation.
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Affiliation(s)
- J W Von den Hoff
- Department of Orthodontics and Oral Biology, Radboud University Medical Centre Nijmegen, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.
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Caviedes-Bucheli J, Angel-Londoño P, Díaz-Perez A, Orozco MP, Álvarez JL, Lombana N, Díaz E, Muñoz HR. Variation in the Expression of Insulin-like Growth Factor-1 in Human Pulp Tissue According to the Root-development Stage. J Endod 2007; 33:1293-5. [DOI: 10.1016/j.joen.2007.07.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Revised: 07/12/2007] [Accepted: 07/18/2007] [Indexed: 10/22/2022]
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Hoeflich A, Götz W, Lichanska AM, Bielohuby M, Tönshoff B, Kiepe D. Effects of insulin-like growth factor binding proteins in bone -- a matter of cell and site. Arch Physiol Biochem 2007; 113:142-53. [PMID: 17922310 DOI: 10.1080/13813450701531193] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The actions of the insulin-like growth factor (IGF)-system are controlled by six IGF-binding proteins (IGFBPs). The IGFBPs are thought to affect local effects of IGF-I and IGF-II due to higher affinity if compared to IGF-I receptors and due to cell-type specific IGFBP expression patterns. It was found in IGFBP knockout models that the IGFBP family is functionally redundant. Thus, functional analysis of potential effects of IGFBPs is dependent on descriptive studies and models of IGFBP overexposure in vitro and in vivo. In the literature, the role of the IGFBPs for bone growth is highly controversial and, to date, no systematic look has been taken at IGFBPs resolving functional aspects of IGFBPs at levels of cell types and specific locations within bones. Since IGFBPs are thought to represent local modulators of the IGF actions and also exert IGF-independent effects, this approach is particularly reasonable on a physiological level. By sorting the huge number of in part controversial results on IGFBP effects in bone present in the literature for distinct cell types and bone sites it is possible to generate a focused, more specific and a less controversial picture of IGFBP functions in bone.
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Affiliation(s)
- A Hoeflich
- Laboratory of Mouse Genetics, Research Unit of Genetics and Biometry, Research Institute for the Biology of Farm Animals Dummerstorf (FBN), Germany.
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Lee SH, Shin H. Matrices and scaffolds for delivery of bioactive molecules in bone and cartilage tissue engineering. Adv Drug Deliv Rev 2007; 59:339-59. [PMID: 17499384 DOI: 10.1016/j.addr.2007.03.016] [Citation(s) in RCA: 431] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Accepted: 03/28/2007] [Indexed: 12/16/2022]
Abstract
Regeneration of bone and cartilage defects can be accelerated by localized delivery of appropriate growth factors incorporated within biodegradable carriers. The carrier essentially allows the impregnated growth factor to release at a desirable rate and concentration, and to linger at injury sites for a sufficient time to recruit progenitors and stimulate tissue healing processes. In addition, the carrier can be formulated to have particular structure to facilitate cellular infiltration and growth. In this review, we present a summary of growth factor delivery carrier systems for bone and cartilage tissue engineering. Firstly, we describe a list of growth factors implicated in repair and regeneration of bone and cartilage by addressing their biological effects at different stages of the healing process. General requirements for localized growth factor delivery carriers are then discussed. We also provide selective examples of material types (natural and synthetic polymers, inorganic materials, and their composites) and fabricated forms of the carrier (porous scaffolds, microparticles, and hydrogels), highlighting the dose-dependent efficacy, release kinetics, animal models, and restored tissue types. Extensive discussion on issues involving currently investigated carriers for bone and cartilage tissue engineering approaches may illustrate future paths toward the development of an ideal growth factor delivery system.
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Affiliation(s)
- Soo-Hong Lee
- Stem Cell Research Laboratory, CHA Stem Cell Institute, Pochon CHA University, Seoul, Republic of Korea
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Akamatsu T, Purwanti N, Karabasil MR, Li X, Yao C, Kanamori N, Hosoi K. Temporospatially regulated expression of subtilisin-like proprotein convertase PACE4 (SPC4) during development of the rat submandibular gland. Dev Dyn 2007; 236:314-20. [PMID: 17083113 DOI: 10.1002/dvdy.21008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The temporospatial expression of PACE4, a member of the mammalian subtilisin-like proprotein convertase family involved in the activation of growth/differentiation factors, was investigated by in situ hybridization during the development of the rat submandibular gland (SMG). At the initiation stage (day 15.5 of gestation; E15), PACE4 was intensely expressed in the submandibular epithelium, but weakly expressed in the mesenchymal cells. At E16 when the branching morphogenesis becomes obvious, the expression of PACE4 in the mesenchyme was further decreased, although its level in the submandibular epithelium had not changed remarkably from that at E15. During the next stage of embryonic development (E17-E20), PACE4 was expressed in the cells derived from the submandibular epithelium, which include the proacinar, terminal tubular, and presumptive ductal cells. In the perinatal SMG, PACE4 was still expressed intensely in the terminal portion of the SMG containing the proacinar and terminal tubular cells, whereas its expression in the ductal cells was obviously decreased at the second postnatal day (P2) and at P6. Acinar cells expressing no PACE4 appeared, and their numbers increased following their development (P9-P20). At P30 when the PACE4 expression in the acinar cells was completely suppressed, its expression in the ductal cells became intense again. This temporospatially regulated expression of PACE4 suggests its apparent association with the proliferation, differentiation, and establishment of functional acinar and ductal cells of the SMG.
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Affiliation(s)
- Tetsuya Akamatsu
- Department of Molecular Oral Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Antonelli G, Cappellin E, Gatti R, Chiappin S, Spinella P, De Palo EF. Measurement of free IGF-I saliva levels: Perspectives in the detection of GH/IGF axis in athletes. Clin Biochem 2007; 40:545-50. [PMID: 17321513 DOI: 10.1016/j.clinbiochem.2007.01.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Revised: 01/18/2007] [Accepted: 01/18/2007] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To examine an immunoassay for measuring free IGF-I in a saliva specimen (free sIGF-I) and to study the levels in relation to the training conditions comparing young athletes and sedentary females. DESIGN AND METHODS The analysis was carried out by modifying a commercial kit for plasma matrix to measure the free sIGF-I. The plasma free and total IGF-I fractions, hGH and salivary total proteins were also measured. Saliva and blood specimens were collected from 15 well-trained young female volleyball athletes and from a control group of 14 young sedentary females. RESULTS The calibration curve to assay free sIGF-I covered the range 0.05-5.00 microg/L. The detection limit was 0.07 microg/L. The within-run and between-run imprecision CVs were 10% and 13% respectively. The average recovery was 88%. Free sIGF-I, measured in 15 athletes and in 14 young sedentary females, was 0.10+/-0.03 and 0.20+/-0.05 micarog/L respectively (p<0.001). CONCLUSIONS There were decreased levels of free sIGF-I in well-trained athletes, compared with sedentary females. This decrease could be related to a greater tissue requirement by the active muscle subjected to intense exercise for several days.
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Affiliation(s)
- G Antonelli
- Section of Clinical Biochemistry, Department of Medical Diagnostic Sciences and Spec. Ther., University of Padua, c/o ex Istituto di Semeiotica Medica Via Ospedale 105, 35128 Padova, Italy
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Götz W, Kunert D, Zhang D, Kawarizadeh A, Lossdörfer S, Jäger A. Insulin-like growth factor system components in the periodontium during tooth root resorption and early repair processes in the rat. Eur J Oral Sci 2006; 114:318-27. [PMID: 16911103 DOI: 10.1111/j.1600-0722.2006.00381.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
There is evidence that growth factors, such as the insulin-like growth factors (IGFs), are involved in biological and pathological processes in oro-dento-facial tissues. To investigate their roles in tooth movement, root resorption, and repair, the occurrence of components of the IGF system, including the ligands IGF-I and -II, the IGF receptor 1 (IGF1R) and six IGF-binding proteins (IGFBP-1 to -6), was investigated by immunohistochemistry on sections from rat maxillae where the first molar had been moved mesially by means of an orthodontic appliance for 9 d to induce root resorption. After force deactivation on day 0, early repair was studied after a further 5, 7, 10, 12, 14, and 17 d. The immunostaining pattern in the periodontal ligament, cementum, and bone of control animals showed similarities known from studies in human teeth. Increased immunostaining for nearly all components in pressure sides and resorption lacunae indicated an involvement in resorption processes and clastic activities. During early stages of repair, the occurrence of several components (e.g. IGF-II, IGFBP-5 or -6) within lacunae and in cementoblasts showed an involvement in the resorption-repair sequence, which is considered to be a coupling process as known from bone.
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Affiliation(s)
- Werner Götz
- University of Bonn, Dental Clinic, Department of Orthodontics, Bonn, Germany.
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Chen FM, Zhao YM, Wu H, Deng ZH, Wang QT, Zhou W, Liu Q, Dong GY, Li K, Wu ZF, Jin Y. Enhancement of periodontal tissue regeneration by locally controlled delivery of insulin-like growth factor-I from dextran–co-gelatin microspheres. J Control Release 2006; 114:209-22. [PMID: 16859799 DOI: 10.1016/j.jconrel.2006.05.014] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Revised: 05/15/2006] [Accepted: 05/17/2006] [Indexed: 12/31/2022]
Abstract
The present work focused on the design of novel hydrogel microspheres based on both dextran- and gelatin-derived biomaterials, and discussed whether locally controlled delivery of IGF-I from dextran-co-gelatin hydrogel microspheres (DG-MP) was useful for periodontal regeneration enhancement. Microspheres were synthesized when gelatin was cooperating with glycidyl methacrylate (GMA) derivatized dextrans (Dex-GMA) and the resultant DG-MP with a hydrogel character of which the cross-linking density could be controlled by the degree of substitution (DS, the number of methacrylates per 100 glucopyranose residues) of Dex-GMA. In this study, three types of DG-MP (DG-MP4.7, DG-MP6.3 and DG-MP7.8) obtained from gelatin and Dex-GMA (differing in DS: 4.7, 6.3 and 7.8 respectively) were prepared and characterized by swelling and degradation properties, drug release kinetics and biological capability in promoting tissue regeneration. By swelling in aqueous positively charged IGF-I solutions, the protein could be encapsulated in DG-MP by polyionic complexation with negatively charged acidic gelatin. No obvious influence of Dex-GMA's DS on DG-MP's configuration and size was observed, and the release and degraded properties showed no significant difference between three types of DG-MP in PBS buffer either. However, high DS of Dex-GMA could lower microsphere's swelling, prolong its degraded time and minimize IGF-I burst release markedly in dextranase-containing PBS, where IGF-I release from a slow release type of microspheres (DG-MP7.8) could be maintained more than 28 days, and an effective protein release kinetics without a significant burst but a relevantly constant release after the initial burst was achieved. IGF-I in DG-MP resulted in more new bone formation in the periodontal defects within 4 or 8 weeks than IGF-I in blood clot directly did (P < 0.01). The observed newly formation of periodontal tissues including the height and percentage of new bone and new cementum on the denuded root surfaces of the furcation area in DG-MP7.8 group were more than that in other groups (P < 0.05). The adequate width of regenerative periodontal ligament (PDL), regular Sharpey's fibers and alveolar bone reconstruction could be observed only in DG-MP7.8 group. These combined results demonstrate that effective release kinetics can be realized by adjusting the DS of Dex-GMA and followed cross-linking density of DG-MP, and that locally controlled delivery of IGF-I from slow release type of DG-MP may serve as a novel therapeutic strategy for periodontal tissue regeneration.
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Affiliation(s)
- Fa-ming Chen
- Department of Periodontology and Oral Medicine, College of Stomatology, Fourth Military Medical University, 145th Chang-le Road, Xi'an 710032, Shaanxi, China.
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Götz W, Heinen M, Lossdörfer S, Jäger A. Immunohistochemical localization of components of the insulin-like growth factor system in human permanent teeth. Arch Oral Biol 2006; 51:387-95. [PMID: 16321360 DOI: 10.1016/j.archoralbio.2005.10.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2005] [Revised: 09/06/2005] [Accepted: 10/12/2005] [Indexed: 10/25/2022]
Abstract
There is growing evidence that the insulin-like growth factor (IGF) system plays an important role in the biology of oro-dento-facial tissues and organs, including the development, homeostasis and regeneration of the periodontium. To obtain basic data on the occurrence and distribution of IGF components in human permanent teeth we immunohistochemically investigated 25 extracted, decalcified and paraffin-embedded teeth using mono and polyclonal antibodies against the ligands IGF-I and -II, the IGF1 receptor (IGF1R) and all six IGF binding proteins (IGFBP-1 to -6). In the extracellular matrix (ECM) of the adhering periodontal ligament (PDL), immunoreactivity for IGF-I, -II and IGFBP-1 and -6 was observed. PDL fibroblasts showed immunostaining for the IGF1R. For the cementum, in the acellular cementum only IGF-II could be detected, while outer cementum layers with inserting Sharpey's fibers reacted with all antibodies applied except for IGFBP-4 and -6. In the pulp, mainly fibrotic areas and areas around denticles were immunoreactive for IGF-I, IGFBP-1, -3, -5 and -6. Predentin and odontoblastic processes were stained for IGF-I and IGFBP-3. The spatially oriented occurrence of components of the IGF system in human permanent teeth indicates that specific functions of the IGFs may be localized in particular tissue compartments. In the cementum, several IGF components were found indicating roles in tissue homeostasis or attachment. The PDL may function as a reservoir for IGFs probably bound to ECM components. PDL fibroblasts could then respond in a paracrine manner. In the pulp, the IGF system may be involved in odontoblast biology, fibrosis and denticle formation.
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Affiliation(s)
- Werner Götz
- Department of Orthodontics, University of Bonn, Dental Clinic, Oral Biology Laboratory, Welschnonnenstr. 17, D-53111 Bonn, Germany.
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Toia M, Galazzo R, Maioli C, Granata R, Scarlatti F. The IGF-I/IGFBP-3 system in gingival crevicular fluid and dependence on application of fixed force. J Endocrinol Invest 2005; 28:1009-14. [PMID: 16483180 DOI: 10.1007/bf03345340] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND During application of orthodontic force on the tooth, various molecular parameters associated with tissue remodeling are changed. IGF-I is a regulatory protein produced during periodontal regeneration. IGF binding proteins-3 (IGFBP-3), a specific IGF-I binding protein, is the major regulatory factor of IGF-I activity. OBJECTIVES We tested the hypothesis that changes in the IGF-I/ IGFBP-3 system occur during fixed force application to the tooth and that these changes are detectable in the gingival crevicular fluid (GCF). METHODS IGFBP-3 and IGF-I secretion into gingival crevicular fluid (GCF) was analyzed by Western blotting and immunoradiometric assay (IRMA), respectively, in GCF of 6 healthy subjects just prior to and during orthodontics treatment using fixed appliances. RESULTS We observed a significant time-dependent decrease of IGFBP-3 content in GCF during orthodontic treatment (4 h and 10 days). Reduction in levels of intact, glycosylated 47 kDa form of IGFBP-3 was associated with its degradation and the appearance of intermediate breakdown products. IGF-I levels were significantly increased 4 h after application of orthodontic force, while they were significantly reduced 10 days after the start of treatment. CONCLUSIONS IGFBP-3 secretion into GCF and its molecular structure are modified by the fixed force of orthodontic treatment. Alterations in IGFBP-3 appear to be unrelated to the binding to IGF-I, suggesting an IGF-independent role of this binding protein in tooth movement.
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Affiliation(s)
- M Toia
- Laboratory of Biochemistry and Molecular Biology, San Paolo University Hospital, School of Medicine, Milan, Italy
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