Abstract:
BACKGROUND:To improve regenerative therapies, it is important to understand the cells and factors modulating periodontal tissues. Our group has focused on bone sialoprotein (BSP), a mineralized tissue-selective protein considered to be involved in the initiation of cementogenesis and osteogenesis. In this study, we examined whether gene transfer of BSP into periodontal ligament (PDL) cells would result in an increased ability of PDL cells to promote mineralization in vitro and in vivo. METHODS:PDL cells obtained from CD-1 mice were immortalized using simian virus (SV) 40 large T antigen (TAg) and designated SV-PDL cells. SV-PDL cells were infected in vitro with LacZ gene-expressing control adenovirus vector. A 1,000 plaque-forming unit (pfu) titer was selected (based on X-gal staining) and cells were infected with mouse BSP-expressing replication-deficient adenoviral vector to determine the mRNA expression and protein level of BSP. Total RNA was isolated from cells on days 2, 4, and 6. Media were obtained on days 3, 5, and 7 for protein determination. Northern blot analysis was performed for mRNA expression and Western blot analysis for protein expression. To test the effect of BSP gene transfer on the mineralization of PDL cells, in vitro (von Kossa) and in vivo (severe combined immunodeficiency [SCID] mice) experiments were performed. RESULTS:Under normal conditions, PDL cells do not express BSP transcripts and do not promote significant mineralization. SV-PDL cells infected with a BSP viral vector expressed and secreted substantial levels of BSP as confirmed by Northern and Western blot analysis. BSP mRNA and protein levels were strong on day 2 and still apparent on day 6, although not as great. However, no mineral nodule formation was noted either in vitro or in vivo. CONCLUSIONS:Although BSP is an important and necessary protein for mineralization, it may not be sufficient for promoting mineralization without the addition or removal of other factors. Further studies will help to clarify the specific factors required for promoting mineralization, a required step for designing predictable periodontal regenerative therapies.
journal_name
J Periodontoljournal_title
Journal of periodontologyauthors
Hakki SS,Wang D,Franceschi RT,Somerman MJdoi
10.1902/jop.2006.050057subject
Has Abstractpub_date
2006-02-01 00:00:00pages
167-73issue
2eissn
0022-3492issn
1943-3670journal_volume
77pub_type
杂志文章abstract:BACKGROUND:Data are limited on the potential effect of intensive oral hygiene regimens and periodontal therapy during pregnancy on periodontal health, gingival crevicular fluid (GCF) and serum cytokines, and pregnancy outcomes. METHODS:A clinical trial was conducted on 120 community-dwelling, 16- to 35-year-old pregna...
journal_title:Journal of periodontology
pub_type: 临床试验,杂志文章
doi:10.1902/jop.2014.140248
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Prevalence of peri-implantitis is directly proportional to the time of functional loading. The aim of this retrospective study was to assess the survival and success rates as well as the incidence of peri-implantitis among patients with a history of periodontitis and among implants with 1 to 10 years of func...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.18-0715
更新日期:2019-12-20 00:00:00
abstract::Smoker's melanosis is a benign pigmentation of the oral mucosa, predominantly observed on the attached anterior mandibular gingiva and interdental papillae. These macular lesions are independent of genetic factors, therapeutic medication usage, and various systemic disorders. As a group they are often seen after the t...
journal_title:Journal of periodontology
pub_type: 杂志文章,评审
doi:10.1902/jop.1991.62.8.524
更新日期:1991-08-01 00:00:00
abstract::The purpose of this study was to examine the effect of inflammatory cytokines on IFN-γ-induced HLA-DR expression on cultured human gingival fibroblasts by flow cytometry. Natural human IFN-γ, recombinant human interleukin-1β (rhIL-1β), and rh tumor necrosis factor-α (rhTNF-α) were used. IFN-γ-induced upregulation of H...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1994.65.4.336
更新日期:1994-04-01 00:00:00
abstract::The correlation between downgrowth of subgingival plaque and loss of attachment was evaluated on 27 teeth which had to be extracted because of advanced bone loss in 16 patients between ages 12 and 22. The diagnostic criteria were those used for periodontosis. The teeth were stained and examined under the stereomicrosc...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1977.48.3.125
更新日期:1977-03-01 00:00:00
abstract::Experimentation in animal models has created a basis for highly improved therapeutic procedures in reconstructive periodontal surgery. This symposium has discussed several animal models currently used; additional models have been described in recent literature. The presentations by Drs. Caton, Wikesjö, and Lynch illus...
journal_title:Journal of periodontology
pub_type: 评论,杂志文章
doi:10.1902/jop.1994.65.12.1169
更新日期:1994-12-01 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:Platelet-rich plasma is used in oral and maxillofacial surgery; however, its real efficacy is debated. Also, the in vitro effects on bone-specific functions are contradictory. Understanding the mechanisms of action of platelet-derived factors could be the basis for their proper use in clinical applications. ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2007.070116
更新日期:2007-10-01 00:00:00
abstract::Dental implant placement associated with augmentation of the sinus floor in the severely atrophic maxilla can be performed in 1- or 2-surgical stages, depending on the height of the residual alveolar bone. A minimum of 4 to 5 mm of residual alveolar bone height is recommended for a 1-stage surgical procedure. The pres...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1998.69.12.1397
更新日期:1998-12-01 00:00:00
abstract:BACKGROUND:It is hypothesized that levels of advanced glycation end products (AGEs) are higher in the gingival crevicular fluid (GCF) of chronic periodontitis (CP) patients with type-2 diabetes mellitus (type-2 DM) than controls (systemically healthy individuals without CP. The aim was to assess the levels of AGEs in t...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1002/JPER.19-0209
更新日期:2020-03-01 00:00:00
abstract:BACKGROUND:Gingival melanin depigmentation procedures are commonly associated with recurrence of pigmentation, which starts with migration of melanocytes from the adjacent free gingiva. The extent and rate of recurrence varies according to the treatment modalities used and duration of follow-up. The aim of this study i...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2012.120094
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND:It was hypothesized that periodontal diseases may increase the risk of preeclampsia. To test this hypothesis, this study was conducted to determine the association between periodontal parameters and preeclampsia among women in the north of Jordan. METHODS:A case-control study was conducted among women who g...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2006.050463
更新日期:2006-10-01 00:00:00
abstract::Cyclosporine A (CsA) and verapamil are two agents used in renal transplantation, both of which are suspected of inducing gingival overgrowth. This study was conducted to investigate the effect of verapamil on the severity and prevalence of CsA-induced gingival overgrowth. Fifty-one (51) renal transplant recipients (to...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1996.67.11.1201
更新日期:1996-11-01 00:00:00
abstract:BACKGROUND:There is evidence of reduced antioxidant (AO) defense in periodontitis and pregnancy and adverse interactions between periodontitis and pregnancy. METHODS:In this study, serum and gingival crevicular fluid (GCF) total AO capacity (TAOC) and superoxide dismutase (SOD) enzyme concentrations in pregnant patien...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2009.080218
更新日期:2009-03-01 00:00:00
abstract::The botryoid odontogenic cyst is considered to be a multiloculated variant of the lateral periodontal cyst. Fewer than 40 of these lesions have been described, many of which have recurred. This paper describes the demographic, clinical, microscopic, and radiographic features of 33 unreported cases from the files of th...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1995.66.12.1069
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Many models have been suggested for surgical training in sinus floor elevation (SFE), but information on key features that provide feedback to the trainee is scarce. The aim of this study is to compare the thickness of the lateral wall of the maxillary sinus (TLWMS) and the thickness of the Schneiderian memb...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2011.110210
更新日期:2012-03-01 00:00:00
abstract::Eleven cases are presented which demonstrated severe periodontal bone loss especially in the posterior segments of the mouth in a group of young men, ages 22 to 32, unexplained by other local etiologic factors. The only common denominator in all cases was severe emotional stress associated with active duty in Viet Nam...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1976.47.2.67
更新日期:1976-02-01 00:00:00
abstract::Extracts of corn and some nuts were found to ubiquitously stimulate both adult and newborn cord blood lymphocytes to transform and produce a factor chemotactic for monocytes. This indicates that corn and nuts contain a mitogen and are potential stimulators of the cellular immune response. The exposure of lymphocytes t...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1975.46.9.562
更新日期:1975-09-01 00:00:00
abstract:BACKGROUND:The habit of chewing areca quid (AQ) has been implicated in oral pathogenesis, including periodontal disease. Little is understood about the roles of AQ in the cytokine secretion by immune cells. The study examined the effects of areca nut, the major ingredient of AQ, on the production of interleukin (IL)-6 ...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2006.060039
更新日期:2006-12-01 00:00:00
abstract::Recent evidence suggests that dental plaque is not a homogeneous bacterial mass but, on the contrary, specific bacterial morphotypes and species may be preferentially located within certain microenvironments. The aim of the present study was to develop combined gold immunolabeling and scanning electron microscopic (SE...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1990.61.5.249
更新日期:1990-05-01 00:00:00
abstract:BACKGROUND:It has been shown that toll-like receptor (TLR) 2- and TLR4-stimulating abilities of supragingival plaque (SPP) are associated with periodontal conditions. It is hypothesized that SPP might affect the periodontium through its influence on subgingival plaque (SBP). This study investigates relationships betwee...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2016.150573
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND:This study compared 6-month and 3-year outcomes for root coverage (RC) by coronally advanced flap (CAF) procedures in localized gingival recessions. METHODS:Two centers, that had participated in a 6-month multinational multicenter randomized clinical trial (RCT), followed up 18 patients with 36 Miller Class...
journal_title:Journal of periodontology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1902/jop.2017.160767
更新日期:2017-07-01 00:00:00
abstract::The inter-incisal distance and dimension of the interdental papilla between the mandibular incisors were examined in cyclosporin A (CSA) fed rats over 6 weeks. Rats in the test group received CSA daily in mineral oil by gastric feeding (30 mg/kg body weight); the control group received mineral oil only. The inter-inci...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1997.68.12.1231
更新日期:1997-12-01 00:00:00
abstract:BACKGROUND:Collagen membranes cross-linked by glycation (GLYM) for guided bone regeneration (GBR) and guided tissue regeneration (GTR) are used extensively with proven safety and efficacy. Complete GLYM ossification, when placed in contact with bone, was described in a canine jaw model, suggesting that GLYM may serve a...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.2008.070421
更新日期:2008-06-01 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::The purposes of this study were to determine if: 1) an association exists between cigarette smoking and signs of periodontal disease after controlling for the confounding variables of age, sex, plaque, and calculus; 2) the prevalence of 5 bacteria commonly associated with periodontal disease differs between smokers an...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1993.64.12.1225
更新日期:1993-12-01 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:BACKGROUND:One-stage full-mouth scaling and root planing (FM-SRP) in combination with systemically administered azithromycin was shown to be clinically and bacteriologically effective in the treatment of chronic periodontitis. However, FM-SRP requires 2 hours for completion. Azithromycin has a long half-life. Therefore...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1902/jop.2009.090067
更新日期:2009-09-01 00:00:00
abstract:BACKGROUND:The purpose of this study is to evaluate the safety, patient acceptance, and short-term microbiologic effect of a new air-polishing device in subjects in maintenance care with residual pockets > or =5 mm. METHODS:This was an examiner-masked, randomized, split-mouth clinical trial. A new disposable nozzle, a...
journal_title:Journal of periodontology
pub_type: 杂志文章,随机对照试验
doi:10.1902/jop.2009.090394
更新日期:2010-01-01 00:00:00
abstract::Ninety patient records were examined in order to determine radiographically whether an association between open interproximal contacts and increased alveolar bone loss exists. The amount of alveolar bone in the open contact site was compared to the amount of alveolar bone in the contralateral closed contact site. Open...
journal_title:Journal of periodontology
pub_type: 杂志文章
doi:10.1902/jop.1981.52.8.447
更新日期:1981-08-01 00:00:00