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Journal of Dental Research

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https://www.readbyqxmd.com/read/30004820/epstein-barr-virus-infected-plasma-cells-infiltrate-erosive-oral-lichen-planus
#1
H Raybaud, C V Olivieri, L Lupi-Pegurier, S Pagnotta, R Marsault, N Cardot-Leccia, A Doglio
Epstein-Barr virus (EBV), in addition to its transforming properties, contributes to the pathogenesis of several inflammatory diseases. Here, we investigated its involvement in oral lichen planus (OLP), a common autoimmune-like disease of unknown etiopathogenesis that can display a malignant potential. EBV-infected cells (EBV+ cells) were sought in a large series of clinically representative OLPs ( n = 99) through in situ hybridization to detect small noncoding EBV-encoded RNAs. Overall, our results demonstrated that EBV was commonly found in OLP (74%), with significantly higher frequency (83%) in the erosive form than in the reticular/keratinized type mild form (58%)...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/30004817/mechanobehavior-and-ontogenesis-of-the-temporomandibular-joint
#2
J C Nickel, L R Iwasaki, Y M Gonzalez, L M Gallo, H Yao
Craniofacial secondary cartilages of the mandibular condyle and temporomandibular joint (TMJ) eminence grow in response to the local mechanical environment. The intervening TMJ disc distributes normal loads over the cartilage surfaces and provides lubrication. A better understanding of the mechanical environment and its effects on growth, development, and degeneration of the TMJ may improve treatments aimed at modifying jaw growth and preventing or reversing degenerative joint disease (DJD). This review highlights data recorded in human subjects and from computer modeling that elucidate the role of mechanics in TMJ ontogeny...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29995454/signals-in-stem-cell-differentiation-on-fluorapatite-modified-scaffolds
#3
T Guo, G Cao, Y Li, Z Zhang, J E Nör, B H Clarkson, J Liu
Previously, we reported that the fluorapatite (FA)-modified polycaprolactone (PCL) nanofiber could be an odontogenic/osteogenic inductive tissue-engineering scaffold by inducing stem cell differentiation and mineralization. The present study aimed to explore which of the signal pathways affected this differentiation and mineralization process. The Human Signal Transduction PathwayFinder RT2 Profiler PCR Array was used to analyze the involvement of potential signal transduction pathways during human dental pulp stem cell (DPSCs) osteogenic differentiation induced by FA-modified PCL nanofiber scaffolds...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29995438/managing-our-older-population-the-challenges-ahead
#4
J H Meurman, G McKenna, H Murtomaa, M Nakao, H Ogawa, A Walls, D Williams
No abstract text is available yet for this article.
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29993312/resolving-macrophages-counter-osteolysis-by-anabolic-actions-on-bone-cells
#5
A Viniegra, H Goldberg, Ç Çil, N Fine, Z Sheikh, M Galli, M Freire, Y Wang, T E Van Dyke, M Glogauer, C Sima
Progression of inflammatory osteolytic diseases, including rheumatoid arthritis and periodontitis, is characterized by increased production of proinflammatory mediators and matrix-degrading enzymes by macrophages and increased osteoclastic activity. Phenotypic changes in macrophages are central to the healing process in virtually all tissues. Using a murine model of periodontitis, we assessed the timing of macrophage phenotypic changes and the impact of proresolving activation during inflammatory osteolysis and healing...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29993304/macrophages-the-bridge-between-inflammation-resolution-and-tissue-repair
#6
G P Garlet, W V Giannobile
No abstract text is available yet for this article.
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29986157/protein-arginine-methyltransferase-prmt1-is-essential-for-palatogenesis
#7
Y Gou, J Li, O Jackson-Weaver, J Wu, T Zhang, R Gupta, I Cho, T V Ho, Y Chen, M Li, S Richard, J Wang, Y Chai, J Xu
Cleft palate is among the most common birth defects. Currently, only 30% of cases have identified genetic causes, whereas the etiology of the majority remains to be discovered. We identified a new regulator of palate development, protein arginine methyltransferase 1 (PRMT1), and demonstrated that disruption of PRMT1 function in neural crest cells caused complete cleft palate and craniofacial malformations. PRMT1 is the most highly expressed of the protein arginine methyltransferases, enzymes responsible for methylation of arginine motifs on histone and nonhistone proteins...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29986156/identification-and-functional-studies-of-myo1h-for-mandibular-prognathism
#8
R Sun, Y Wang, M Jin, L Chen, Y Cao, F Chen
Mandibular prognathism (MP) is regarded as a craniofacial deformity resulting from the combined effects of environmental and genetic factors, while the genetically predetermined component is considered to play an important role to develop MP. Although linkage and association studies for MP have identified multiple strongly associated regions and genes, the causal genes and variants responsible for the deformity remain largely undetermined. To address this, we performed targeted sequencing of 396 genes selected from previous studies as well as genes and pathways related with craniofacial development as primary candidates in 199 MP cases and 197 controls and carried out a series of statistical and functional analyses...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29975849/a-functionally-graded-picn-material-for-biomimetic-cad-cam-blocks
#9
M Eldafrawy, J F Nguyen, A K Mainjot, M J Sadoun
The objective of this study was to introduce a functionally graded (FG) polymer-infiltrated ceramic network (PICN) block, characterized by a gradient of mechanical properties, as a biomimetic material for computer-aided design and manufacturing (CAD-CAM) prostheses. FG-PICN blocks were manufactured from a slurry of glass-ceramic powder, which was subsequently centrifuged and sintered. The ceramic network was infiltrated with urethane dimethacrylate and polymerized under high temperature-pressure. Blocks were sectioned into 9 layers, and each layer was subsequently cut into 3 samples...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29975848/ectopic-hedgehog-signaling-causes-cleft-palate-and-defective-osteogenesis
#10
N L Hammond, K J Brookes, M J Dixon
Cleft palate is a common birth defect that frequently occurs in human congenital malformations caused by mutations in components of the Sonic Hedgehog (S HH) signaling cascade. Shh is expressed in dynamic, spatiotemporal domains within epithelial rugae and plays a key role in driving epithelial-mesenchymal interactions that are central to development of the secondary palate. However, the gene regulatory networks downstream of Hedgehog (Hh) signaling are incompletely characterized. Here, we show that ectopic Hh signaling in the palatal mesenchyme disrupts oral-nasal patterning of the neural crest cell-derived ectomesenchyme of the palatal shelves, leading to defective palatine bone formation and fully penetrant cleft palate...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29969955/activity-of-streptococcus-mutans-vicr-is-modulated-by-antisense-rna
#11
L Lei, R N Stipp, T Chen, S Z Wu, T Hu, M J Duncan
The VicRK 2-component system of Streptococcus mutans regulates genes associated with cell wall biogenesis and biofilm formation. A putative RNase III-encoding gene ( rnc) is located downstream from the vicRKX operon. The goals of this study were to investigate the potential role of VicR in the regulation of adjacent downstream genes and evaluate transcription levels of vicR during planktonic and biofilm growth. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to investigate whether vicRKX and adjacent downstream genes were cotranscribed...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29969954/examination-of-the-interproximal-wear-mechanism-facet-morphology-and-surface-texture-analysis
#12
A Pokhojaev, W Habashi, H May, E Schulz-Kornas, N Shvalb, R Sarig
Dentition is considered a dynamic system with forces that directly affect dental treatment stability and success. Understanding the biomechanical forces that influence tooth alignment is essential for both planning and performing dental treatments, as well as for anthropological and evolutionary studies. While there is currently an abundance of research on the mechanics of dental wear at the occlusal surface, the mechanics of interproximal dental wear is largely unexplored. The fretting mechanism, a wear process resulting from small-amplitude cyclic motion of 2 solid contacting surfaces, was refuted as a possible mechanism for occlusal wear but has never been considered for interproximal wear...
July 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29939809/hydrogen-peroxide-might-bleach-natural-dentin-by-oxidizing-phosphoprotein
#13
T Jiang, Y R Guo, X W Feng, Y Sa, X Yang, M Wang, P Li, Y N Wang
Recent studies suggested that bleaching agents may whiten teeth by oxidizing the fluorescent materials, which are the proteins located in the organic-inorganic interface. Therefore, we postulated that fluorescence of dentin came from dentin phosphoprotein (DPP) and that bleaching agents might bleach dentin by oxidizing DPP. Fifty-six specimens were randomly divided into 4 groups and exposed to distilled water, hydrogen peroxide (HP), ethylenediamine tetraacetic acid disodium salt (EDTA), and acetic acid for 24 h...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29932801/overexpressed-sirt1-in-mscs-promotes-dentin-formation-in-bmi1-deficient-mice
#14
H Wang, C Lv, Y Gu, Q Li, L Xie, H Zhang, D Miao, W Sun
Sirt1 promotes odontoblastic gene expression in human dental pulp cells, whereas the inhibition of Sirt1 downregulates the expression of those genes. To investigate whether the overexpression of Sirt1 in mesenchymal stem cells (MSCs) driven by Prx1 promoter could rescue the dentin formation defects in Bmi1-deficient (Bmi1-/- ) mice, we established the MSCs overexpressing Sirt1 in Bmi1 knockout mice (Sirt1TG Bmi1-/- ). First, we used Prx1-Cre/ROSAnTnG mice to demonstrate that Prx1 linage cells exist mainly in the pulp horns at 4 wk of age...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29928832/amalgam-alternatives-cost-effectiveness-and-value-of-information-analysis
#15
F Schwendicke, G Göstemeyer, M Stolpe, J Krois
We aimed to assess the cost-effectiveness of amalgam alternatives-namely, incrementally placed composites (IComp), composites placed in bulk (BComp), and glass ionomer cements (GIC). In a sensitivity analysis, we also included composite inlays (CompI) and incrementally placed bulk-fills (IBComp). Moreover, the value of information (VOI) regarding the effectiveness of all strategies was determined. A mixed public-private-payer perspective in the context of Germany was adopted. Bayesian network meta-analyses were performed to yield effectiveness estimates (relative risk [RR] of failure)...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29928831/family-history-of-mi-smoking-and-risk-of-periodontal-disease
#16
Y H Yu, L Doucette-Stamm, J Rogus, K Moss, R Y L Zee, B Steffensen, P M Ridker, J E Buring, S Offenbacher, K Kornman, D I Chasman
Periodontal disease (PD) shares common risk factors with cardiovascular disease. Our hypothesis was that having a family history of myocardial infarction (FamHxMI) may be a novel risk factor for PD. Risk assessment based on FamHxMI, conditional on smoking status, was examined given the strong influence of smoking on PD. Exploratory analysis with inflammatory biomarkers and genetic determinants was conducted to understand potential mechanistic links. The Women's Genome Health Study (WGHS) is a prospective cohort of US female health care professionals who provided blood samples at baseline in the Women's Health Study, a 2 × 2 factorial clinical trial investigating vitamin E and aspirin in the prevention of cardiovascular disease and cancer...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29928825/drug-resistance-and-gene-transfer-mechanisms-in-respiratory-oral-bacteria
#17
S Jiang, J Zeng, X Zhou, Y Li
Growing evidence suggests the existence of new antibiotic resistance mechanisms. Recent studies have revealed that quorum-quenching enzymes, such as MacQ, are involved in both antibiotic resistance and cell-cell communication. Furthermore, some small bacterial regulatory RNAs, classified into RNA attenuators and small RNAs, modulate the expression of resistance genes. For example, small RNA sprX, can shape bacterial resistance to glycopeptide antibiotics via specific downregulation of protein SpoVG. Moreover, some bacterial lipocalins capture antibiotics in the extracellular space, contributing to severe multidrug resistance...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29928824/enrichment-of-innate-lymphoid-cell-populations-in-gingival-tissue
#18
J L Brown, L Campbell, J Malcolm, A Adrados Planell, J P Butcher, S Culshaw
Innate lymphoid cells (ILCs) are a population of lymphocytes that act as the first line of immunologic defense at mucosal surfaces. The ILC family in the skin, lungs, and gastrointestinal tissues has been investigated, and there are reports of individual subsets of ILCs in the oral tissues. We sought to investigate the whole ILC population (group 1, 2, and 3 subsets) in the murine gingivae and the lymph nodes draining the oral cavity. We show that ILCs made up a greater proportion of the whole CD45+ lymphocyte population in the murine gingivae (0...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29913094/defective-nacl-reabsorption-in-salivary-glands-of-eda-null-x-lhed-mice
#19
T Mukaibo, T Munemasa, C Masaki, C Y Cui, J E Melvin
Mutations in the ectodysplasin A gene ( EDA) cause X-LHED (X-linked hypohidrotic ectodermal dysplasia), the most common human form of ectodermal dysplasia. Defective EDA signaling is linked to hypoplastic development of epithelial tissues, resulting in hypotrichosis, hypodontia, hypohidrosis, and xerostomia. The primary objective of the present study was to better understand the salivary gland dysfunction associated with ectodermal dysplasia using the analogous murine disorder. The salivary flow rate and ion composition of the 3 major salivary glands were determined in adult Eda-deficient Tabby hemizygous male (Ta/Y) and heterozygous female (Ta/X) mice...
June 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29913093/recent-advances-in-the-etiology-and-treatment-of-burning-mouth-syndrome
#20
A Ritchie, J M Kramer
Burning mouth syndrome (BMS) is a debilitating condition that has a striking female predilection. Although the oral mucosa is normal in appearance, patients with BMS experience oral burning that most commonly localizes to the lips and tongue. BMS is a diagnosis of exclusion, and all underlying pathoses associated with allodynia must be ruled out prior to rendering the diagnosis. The etiopathogenesis of BMS remains poorly understood, and thus patient management is challenging. Data indicate that oral and systemic factors both contribute to the development and persistence of the condition...
June 1, 2018: Journal of Dental Research
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