Abstract:
BACKGROUND:Metformin, a classical treatment for diabetes mellitus, has shown sound anti-inflammatory effects. Emerging studies have focused on the mechanism underlying inflammation-related diabetic complications, such as diabetic periodontitis. Herein, we investigated the anti-inflammatory effects of metformin on the NIMA-related kinase 7(Nek7)/NOD-like receptor family pyrin domain containing 3 (NLRP3) pathway both in vivo and in vitro in experimental diabetic periodontitis. METHODS:All procedures were conducted in Porphyromonas gingivalis (P.g.)-infected streptozotocin (STZ)-induced diabetic mice and in lipopolysaccharide (LPS)-treated RAW 264.7 cells under high-glucose conditions. A range of techniques were carried out in this study: microCT, western blotting and immunofluorescence were used to analyze periodontal tissues. Enzyme-linked immunosorbent assay (ELISA) was for serum interleukin-1β (IL-1β) detection. Specific pharmacological inhibition was used to stimulate cells. Flow cytometry was implemented to analyze cell cycle. RESULTS:We found that metformin treatment can robustly ameliorate periodontal infection and tissue destruction and reduce blood glucose and serum IL-1β levels in mice with diabetic periodontitis. Moreover, gingival tissue exhibited less macrophage infiltration and decreased expression of Nek7, NLRP3, caspase-1 and mammalian target of rapamycin (mTOR), which were simultaneously observed in RAW 264.7 cell models stimulated with metformin. Metformin also affected the cell cycle in a dose-dependent way. Furthermore, after stimulation with the mTOR inhibitor rapamycin, additional metformin treatment could still downregulate Nek7/NLRP3. CONCLUSIONS:Our research indicated that metformin significantly attenuated experimental diabetic periodontitis both in vivo and in vitro. Metformin suppressed the inflammatory state by inhibiting Nek7 expression to decrease NLRP3 inflammasome activity. Interestingly, mTOR inhibition was not involved in metformin-induced Nek7 downregulation. The observed Nek7 reduction could be related to metformin-mediated cell cycle arrest. This article is protected by copyright. All rights reserved.
journal_name
J Periodontoljournal_title
Journal of periodontologyauthors
Zhou X,Zhang P,Wang Q,Ji N,Xia S,Ding Y,Wang Qdoi
10.1002/jper.10311subject
Has Abstractpub_date
2019-02-19 00:00:00eissn
0022-3492issn
1943-3670pub_type
杂志文章abstract::von Willebrand's disease (vWD) is one of the most common hereditary hemorrhagic disorders. A mild to moderate deficiency of factor VIII and von Willebrand factor (vWf) often is associated with gingival bleeding. In this case report, the periodontal treatment of a patient with vWD is described. A 45-year-old woman with...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1999.70.5.548
更新日期:1999-05-01 00:00:00
abstract:BACKGROUND:Non-surgical periodontal treatment with an Er:YAG laser has been shown to result in significant clinical attachment level gain; however, clinical results have not been established on a long-term basis following Er:YAG laser treatment. Therefore, the aim of the present study was to present the 2-year results ...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.2003.74.5.590
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:The biologic safety profile of oral health care products is often assumed on the basis of simplistic test models such as monolayer cell culture systems. We developed and characterized a tissue-engineered human oral mucosal model, which was proven to represent a potentially more informative and more clinicall...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2009.080610
更新日期:2009-05-01 00:00:00
abstract::Durapatite particles were employed along with autogenous bone chips to treat an extensive periodontal defect on a mandibular first molar which involved the bifurcation area and the distal root. Nine weeks after treatment the tooth was found to be cracked and was extracted along with tissue containing the grafted sites...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1983.54.8.455
更新日期:1983-08-01 00:00:00
abstract::Studies of the inductive properties of human dentin and cementum have yielded differing results. Comparisons are difficult to draw because of variations in time, donor tissue, host immunologic status, implant site, decalcifying agents and degree of decalcification. Analysis of the many experiments intimates that the a...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1985.56.11.699
更新日期:1985-11-01 00:00:00
abstract::Interproximal bony defects were treated with either porous hydroxyapatite (PHA) or decalcified freeze-dried bone allograft (DFDB) implants at two different clinical centers. Twelve paired defects in 12 patients were treated at each center. Six months post-surgically the defects were measured to assess changes from the...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章
doi:10.1902/jop.1990.61.7.399
更新日期:1990-07-01 00:00:00
abstract::The ability to objectively assess periodontal disease activity can significantly affect periodontal therapy. Aspartate aminotransferase (AST) is released extracellularly upon tissue destruction which suggests its potential as a key index in a quantitative assay for evaluating periodontal disease activity. The purpose ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1996.67.8.733
更新日期:1996-08-01 00:00:00
abstract::The purpose of this study was to quantify glycosaminoglycans (GAG) released into the gingival crevicular fluid (GCF) during health, gingivitis, and adult periodontitis. The investigation tested the hypothesis that increased amounts of GAG can be measured in GCF associated with gingivitis and adult periodontitis as com...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1993.64.3.186
更新日期:1993-03-01 00:00:00
abstract::Explants of bovine gingival mucosa were cultured for four days on scaled and citric acid-conditioned root surfaces. Demineralization of the hard tissue with citric acid exposed the collagenous matrix of the root. Undemineralized islands were frequently seen among the collagen fibers of the treated roots. When cultured...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1988.59.2.95
更新日期:1988-02-01 00:00:00
abstract:BACKGROUND:A 10-year follow-up study was conducted to clinically evaluate the long-term results after guided tissue regeneration (GTR) therapy of infrabony defects using non-resorbable and bioabsorbable barriers. METHODS:Twelve pairs of contralateral infrabony defects were treated in 12 subjects with advanced periodon...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1902/jop.2008.070571
更新日期:2008-08-01 00:00:00
abstract::Gingival biopsies of the mesial papilla area of the first molar were obtained from each patient at 0-, 14- and 21-day intervals during plaque formation. The biopsies were fixed, serially sectioned, and Gram-stained. The incidence and distribution of the bacteria-like structures were studied by microscopy. In all the s...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1987.58.12.837
更新日期:1987-12-01 00:00:00
abstract::Specific risk indicators associated with either susceptibility or resistance to severe forms of periodontal disease were evaluated in a cross-section of 1,426 subjects, 25 to 74 years of age, mostly metropolitan dwellers, residing in Erie County, New York, and surrounding areas. The study sample exhibited a wide range...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.3.260
更新日期:1994-03-01 00:00:00
abstract:BACKGROUND:One of the success factors in periodontal plastic surgery is the synergistic relationship between involved tissues and vascular supply. Gingiva as a functional unit is unique with a specific vascular configuration and contains the supracrestal portion naturally created to survive over avascular root surfaces...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1902/jop.2012.110685
更新日期:2013-01-01 00:00:00
abstract::This report describes the case of a 21-year-old female who presented with localized gingival ulceration that over a period of 4 weeks became generalized, affecting all the buccal gingiva as well as the lower lip. A detailed medical history suggested that the patient was generating the lesions herself. She was monitore...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.5.442
更新日期:1994-05-01 00:00:00
abstract:BACKGROUND:Immediate functional loading is a new surgical-prosthetic technique that can be used extensively in implant placement. Because of a lack of experimental reports regarding edentulous maxilla, we decided to evaluate the survival rate of immediately loaded dental implants in this area. METHODS:Forty-three pati...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2005.76.6.1016
更新日期:2005-06-01 00:00:00
abstract::Greater cell attachment to demineralized dentin has been associated with subsequent development of a fiber attachment system. The purpose of this study was to evaluate tissue interactions to dentin demineralized with different concentrations of tetracycline solution. Dentin specimens were obtained from beneath root su...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1988.59.11.714
更新日期:1988-11-01 00:00:00
abstract:BACKGROUND:Alveolar ridge augmentation procedures are often needed prior to implant placement or prosthetic rehabilitation. The purpose of this study was to develop a quantitative method to assess the clinical outcome of such procedures. METHODS:Two volumetric methods, based on the volume difference between the pre- a...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.2002.73.3.302
更新日期:2002-03-01 00:00:00
abstract::This report is an example of tumor metastasis to the temporomandibular joint and its effect on pain, restriction of jaw movement, and the subsequent inability of the patient to function normally. Neoplasm is not the usual etiology of myofascial pain dysfunctionsyndrome and the muscle sparm component of this patient's ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1975.46.5.309
更新日期:1975-05-01 00:00:00
abstract::The purpose of this study was to clinically evaluate the effectiveness of polytetrafluoroethylene membranes in the healing of interproximal Class II furcation defects in maxillary molars using a surgical treatment technique based on the principles of guided tissue regeneration. Eight subjects with similar bilateral Cl...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章
doi:10.1902/jop.1998.69.9.1020
更新日期:1998-09-01 00:00:00
abstract::The capacity of collagen membranes to support guided regeneration of periodontal tissues in the dog was assessed. The mesiolabial, labial and distolabial aspects of the mesial root of the second and third mandibular premolar were surgically exposed in three beagle dogs. Collagen membranes, 0.5 to 0.7 mm thick, prepare...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1988.59.6.380
更新日期:1988-06-01 00:00:00
abstract::Repeated measurements of attachment level appear to be important assessments in periodontal clinical trials, yet the lack of reliability for this assessment creates measurement error which in turn demands increased sample sizes or reduces the power of the test. A plastic occlusal stent has been developed as a fixed re...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1987.58.2.115
更新日期:1987-02-01 00:00:00
abstract:BACKGROUND:Previous studies have demonstrated that enamel matrix derivative (EMD) has the ability to improve clinical parameters when used to treat intraosseous defects. The purpose of the present study was to compare at 12 months postsurgery sites treated with open flap debridement (OFD) alone to those treated with OF...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.2001.72.1.25
更新日期:2001-01-01 00:00:00
abstract::Cemental tears have been described both in exposed and unexposed cementum. The phenomenon is believed to be elicited by overloading or acute trauma from occlusion. In this case report a patient, with a history of periodontal health, presented with an acute periodontal lesion on the distal aspect of a bridge abutment t...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1992.63.3.220
更新日期:1992-03-01 00:00:00
abstract:BACKGROUND:Periodontal disease results from the pathogenic interactions between the tissue, immune system, and microbiota; however, standard therapy fails to address the cellular mechanism underlying the chronic inflammation. Dendritic cells (DC) are key regulators of T cell fate, and biomaterials that recruit and prog...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.19-0411
更新日期:2020-11-01 00:00:00
abstract:BACKGROUND:This review addresses the ability of a commercially available genetic susceptibility test to determine the risk of developing severe chronic periodontitis. The test is used to detect the simultaneous occurrence of allele 2 at the IL-1A+4845 and IL-1B+3954 loci. If both of these polymorphisms are present, pat...
journal_title:Journal of periodontology
pub_type: 杂志文章,meta分析
doi:10.1902/jop.2002.73.2.231
更新日期:2002-02-01 00:00:00
abstract::The present study demonstrated that hyperglycemic diabetic rats fed a low-protein (8%) diet maintained an alveolar bone height similar to controls; in contrast, those fed a standard protein diet (24%) had reduced alveolar bone height (P less than 0.05). Euglycemic diabetic and untreated control rats fed low-protein di...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1989.60.5.264
更新日期:1989-05-01 00:00:00
abstract::Few scientific investigations have addressed the ability of mouthrinses to reduce oral malodor for periods longer than 3 hours. In the present report, we have employed simple, recently described techniques to assess the day-long reduction in oral malodor of a novel 2-phase oil:water mouthrinse (TPM), as compared to a ...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1902/jop.1992.63.1.39
更新日期:1992-01-01 00:00:00
abstract:BACKGROUND:A 5-year-old Japanese boy presented with persistent gingival inflammation and severe mobility of the right lower primary incisors. Due to severe alveolar bone loss and a deep periodontal pocket (5 mm), the incisors were extracted at the second visit. METHODS:Clinical, radiographic, histological, and microbi...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2003.74.7.1060
更新日期:2003-07-01 00:00:00
abstract::This review defines terms such as accuracy, validity, and reliability, which are used to describe the quality of methods for taking x-rays and for analyzing digital images. Values for these parameters are described for techniques of taking standardized x-rays such as ear-rod fixation and fixation by use of teeth with ...
journal_title:Journal of periodontology
pub_type: 杂志文章,评审
doi:10.1902/jop.2000.71.3.497
更新日期:2000-03-01 00:00:00
abstract::In previous studies Fusobacterium nucleatum has been shown to induce either stimulatory or inhibitory effects on human mononuclear cells. We examined the interaction of human mononuclear cells with human and cynomolgus monkey strains of F. nucleatum. Peripheral blood mononuclear cells (PBMCs) isolated from normal dono...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1997.68.1.39
更新日期:1997-01-01 00:00:00