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Tsuji Makiko - - 2012
We examined the attachment of enterohemorrhagic Escherichia coli O157:H7 to abiotic surfaces of cooking utensils. When the cell suspension in 0.85% NaCl (about 100 cells/mL, 10 mL) was contacted with various abiotic surfaces (square pieces, 25 cm(2) ) at 25 °C for 20 min, the number of attached cells varied ...
Jussila Maria M Developmental Biology Program Institute of Biotechnology, Biokeskus 1, P.O. Box 56, University of Helsinki, Helsinki FIN-00014, Finland. - - 2012
Teeth develop as ectodermal appendages from epithelial and mesenchymal tissues. Tooth organogenesis is regulated by an intricate network of cell-cell signaling during all steps of development. The dental hard tissues, dentin, enamel, and cementum, are formed by unique cell types whose differentiation is intimately linked with morphogenesis. During evolution the ...
Song A - - 2012
OBJECTIVES: To observe whether preserved healthy cementum could promote differentiation of human periodontal ligament cells to cementoblasts. MATERIALS AND METHODS: Symmetrical root slices from each healthy premolar were distributed into either the control group (cementum removed) or test group (cementum preserved). After isolation and characterization, human periodontal ligament cells were ...
Lucas Jessica R - - 2012
We investigated the role of the Arabidopsis Microtubule Associated Proteins 65-1 and 65-2 (MAP65-1 and MAP65-2) in the control of axial root growth. Transgenic plants expressing fluorescent fusion proteins from native promoters indicated exactly overlapping accumulation of MAP65-1 and MAP65-2 in the root tip and elongation zone. Nearly identical protein ...
Marcus Ian - - 2012
While biofilms are ubiquitous in nature, the mechanism by which they form is still poorly understood. This study investigated the process by which bacteria deposit and shortly after, attach irreversibly to surfaces by reorienting to create a stronger interaction, which leads to biofilm formation. A model for attachment of Pseudomonas ...
Matsuura Takashi - - 2012
OBJECTIVES: p51/p63 gene, one of the p53 families, is specifically expressed in tooth germ epithelial cells and is essential for tooth development. This study aims to elucidate roles of p51/p63 in ameloblastic cell differentiation. MATERIALS AND METHODS: We determined expression pattern of each of p51/p63 isoforms by reverse transcriptase-polymerase chain ...
Hosen N - - 2012
Clonogenic multiple myeloma (MM) cells reportedly lacked expression of plasma cell marker CD138. It was also shown that CD19(+) clonotypic B cells can serve as MM progenitor cells in some patients. However, it is unclear whether CD138-negative clonogenic MM plasma cells are identical to clonotypic CD19(+) B cells. We found ...
Leone Angelo A BioNec, Section of Histology and Embryology, Faculty of Medicine, University of Palermo, Palermo, - - 2012
The bud-to-cap stage transition during early tooth development is a time when the tooth-inducing potential becomes restricted to the mesenchyme. Several key genes, expressed in the mesenchyme at this stage, are an absolute requirement for the progression of tooth development. These include the transcription factors Msx1 and Pax9. The inductive ...
Díaz-Tielas Carla - - 2012
Chalcone (1,3-diphenyl-2-propen-1-one) is an aromatic ketone precursor of important molecules in plants such as flavonoids or anthocyanins. Its phytotoxicity has been demonstrated on different plant species, but to date little is known about the mechanisms of action of this secondary metaboliteat plant cellular level. Detailed analysis by light and transmission ...
Ji De - - 2012
Three new triterpene saponins, named asperosaponin A-C (1-3), together with seven known triterpene saponins (4-10) were isolated from the roots of Dipsacus asper. The structures of compounds 1-3 were elucidated on the basis of detailed spectroscopic analysis and chemical methods. Compounds 1-3, 6-10 had significantly protective effects in PC12 cells ...
Andrade Gabrielle I - - 2012
Leptospirosis, the world's most ubiquitous zoonosis is caused by pathogenic Leptospira. As microbe-host interactions are specific in pathogenesis, it is likely that there are several molecules mediating attachment of the Leptospira to mammalian cells. In this study, we analyzed the attachment of Leptospira interrogans serovar Portlandvere and L. borgpetersenii serovar ...
Desoutter A V - - 2012
Clinical and histologic features of 26 cases of canine peripheral giant cell granuloma (formerly giant cell epulis) are reported. Two main histologic categories were evident: (1) "classic" peripheral giant cell granuloma, characterized by variable numbers of multinucleated giant cells (MNGCs) admixed with densely cellular mononuclear spindle-shaped cells in variable amounts ...
Hai Wenli - - 2012
Bioassay-guided fractionation of the n-BuOH extract of the roots of Clematis argentilucida led to the isolation of two new triterpenoid saponins along with a known one, cussonside B (3). By extensive spectral analysis and chemical evidences, the structures of the two new saponins were determined to be 3β-O-[β-d-ribopyranosyl-(1→3)-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranosyl] hederagenin-11,13-dien-28-oic acid ...
Carey Shawn P SP Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, - - 2012
Fibrillar collagen gels, which are used extensively in vitro to study tumor-microenvironment interactions, are composed of a cell-instructive network of interconnected fibers and pores whose organization is sensitive to polymerization conditions such as bulk concentration, pH, and temperature. Using confocal reflectance microscopy and image autocorrelation analysis to quantitatively assess gel ...
Itagaki Keisuke - - 2012
Anoikis, apoptosis because of loss of cell anchorage, is crucial for tissue homeostasis. Fibronectin not only provides a scaffold for cell anchorage but also harbors a cryptic antiadhesive site capable of inducing β1-integrin inactivation. In this study, this cryptic antiadhesive site is implicated in spontaneous induction of anoikis. Nontransformed fibroblasts ...
Cochis Andrea - - 2012
The aim of this study was to evaluate in vitro the preventive antiadhesion activity of biosurfactants against Candida albicans biofilm. Disks of silicon and acrylic resin for denture prostheses were precoated with increasing concentrations of biosurfactants obtained from endophyte biofilms selected from Robinia pseudoacacia and from Nerium oleander, and afterward ...
Silva E J N L - - 2012
Silva EJNL, Herrera DR, Almeida JFA, Ferraz CCR, GomesBPFA, Zaia AA. Evaluation of cytotoxicity and up-regulation of gelatinases in fibroblast cells by three root repair materials. International Endodontic Journal. Aim  To investigate the effects of root repair materials on the cytotoxicity and gelatinolytic activity of matrix metalloproteinases (MMPs) in 3T3 ...
Masuda Yuko - - 2012
We recently reported that the MeOH extract from bulbs of Odontioda Marie Noel 'Velano' exhibited diverse biological activities but most of the activity was concentrated into the EtOAc layer separated by sequential organic solvent extractions. In the present study, the EtOAc layer was subjected to silica-gel column chromatography for further ...
Simon D D - - 2012
A commonly used assay for studying cell - matrix interactions is the free-floating fibroblast populated collagen lattice, which was introduced in 1979. Briefly, fibroblasts are seeded within an initially thin, amorphous, untethered, circular gel consisting of reconstituted fibrillar collagen. Although the gel remains traction free and circular, the cells typically ...
Svobodova Hana - - 2012
Oxime HI-6 is an efficient reactivator of the acetylcholinesterase inhibited by organophosphorous nerve agents. In this study we have estimated cytotoxicity of HI-6 by the colony forming assay and genotoxicity by the comet assay on human and rodent cell lines. IC50 of HI-6 assessed by the colony forming capacity was ...
Asgary Saeed - - 2012
In this ex-vivo study, we assessed the adhesion of human gingival fibroblast (HGF) to mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement using a scanning electronic microscope (SEM). Test biomaterials were prepared and inserted in polyethylene wells (n = 18). Glass coverslips were used for control groups. HGFs were ...
Kishore Babu Neerupudi - - 2012
A repeated batch fermentation system was used to produce ethanol using Saccharomyces cerevisiae strain (NCIM 3640) immobilized on sugarcane (Saccharum officinarum L.) pieces. For comparison free cells were also used to produce ethanol by repeated batch fermentation. Scanning electron microscopy evidently showed that cell immobilization resulted in firm adsorption of ...
De Smet Ive I Plant and Crop Sciences Division, School of Biosciences, University of Nottingham, Loughborough LE12 5RD, UK. - - 2012
Plant growth relies heavily on a root system that is hidden belowground, which develops post-embryonically through the formation of lateral roots. The de novo formation of lateral root organs requires tightly coordinated asymmetric cell division of a limited number of pericycle cells located at the xylem pole. This typically involves ...
Erdem U─čur M UM Center for Memory and Brain and Program in Neuroscience, Boston University, 2 Cummington Street, Boston, MA 02215, USA. - - 2012
A goal-directed navigation model is proposed based on forward linear look-ahead probe of trajectories in a network of head direction cells, grid cells, place cells and prefrontal cortex (PFC) cells. The model allows selection of new goal-directed trajectories. In a novel environment, the virtual rat incrementally creates a map composed ...
Ruder Warren C - - 2012
Many physiological systems are regulated by cells that alter their behavior in response to changes in their biochemical and mechanical environment. These cells experience this dynamic environment through an endogenous biomaterial matrix that transmits mechanical force and permits chemical exchange with the surrounding tissue. As a result, in vitro systems ...
Dmitriev Ruslan I - - 2012
The supply of oxygen (O(2)) to respiring tissue, cells, and mitochondria regulates metabolism, gene expression, and cell fate. Depending on the cell type and mitochondrial function, O(2) gradients between extra- and intracellular compartments may vary and play important physiological roles such as the regulation of activity of prolyl hydroxylases and ...
De-Deus G - - 2012
De-Deus G, Canabarro A, Alves GG, Marins JR, Linhares ABR, Granjeiro JM. Cytocompatibility of the ready-to-use bioceramic putty repair cement iRoot BP Plus with primary human osteoblasts. International Endodontic Journal ABSTRACT: Aim  To verify the in vitro cytocompatibility of iRoot BP Plus (iRoot) and to compare it with White ProRoot ...
Lung Mandy S Y - - 2012
In this study, the effect of mutations in transcription factor-binding elements was investigated in the human papillomavirus (HPV) 18 P(105) promoter. Site-directed mutagenesis activities, in the AP1/YY1-, KRF-1-, GRE/YY1-, Sp1- and the double mutation (AP1/YY1- and GRE/YY1)-binding sites were assessed in five human cell lines: HeLa (HPV18-positive cervical carcinoma), SiHa ...
Suaid Fabricia Ferreira FF Department of Prosthodontics and Periodontics, Division of Periodontics, School of Dentistry at Piracicaba, State University of Campinas, São Paulo, - - 2012
This study aimed to evaluate, histomorphometrically, the use of periodontal ligament cells (PDL cells) in the treatment of class III furcation defects. PDL cells were obtained from the mandibular tooth extracted from each dog (7), cultured in vitro and phenotypically characterized. Bilateral class III furcation defects were created at mandibular ...
Nomura Yoshiaki - - 2012
Among the various kinds of fibroblasts existing in the human body, the periodontal ligament (PDL) fibroblasts have been suggested as multipotent cells. Periodontal ligament fibroblasts are characterized by rapid turnover, a high remodeling capacity and remarkable capacity for renewal and repair. They also differentiate into osteoblasts and cementoblasts. We established ...
Huang Rong - - 2012
Shine on: In this mercury(II) sensing approach, the non-fluorescent probe SAN undergoes Hg(2+) -promoted deprotection reaction, resulting in the formation of the two-photon-fluorescent product AAN. The system shows high sensitivity and selectivity and also can be used in live-cell environments.
Dong Meicong M Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, - - 2012
The detection of single molecules in single cells has enabled biochemical analyses to be conducted with high sensitivity and high temporal resolution. In this work, detection of apoptosis was studied by single molecule fluorescence correlation spectroscopy (FCS) in single living cells. Caspase activity was assayed using a new red fluorogenic ...
Pati Falguni - - 2012
The fibrous scaffolds are promising for tissue engineering applications because of their close structural resemblance with native extracellular matrix. Additionally, the chemical composition of scaffold is also an important consideration as they have significant influences on modulating cell attachment, morphology and function. In this study, chitosan-tripolyphosphate (TPP) non-woven fibrous scaffolds ...
Cogoni V - - 2012
Treponema denticola is found ubiquitously in the human oral cavity and is mainly associated with bacterial communities implicated in the establishment and development of periodontal disease. The ability to become integrated within biofilm communities is crucial to the growth and survival of oral bacteria, and involves inter-bacterial coaggregation, metabolic co-operation, ...
Kand Dnyaneshwar - - 2012
A new chromenoquinoline-based fluorescent off-on thiol probe 2 is reported. In aqueous buffer solutions at physiological pH, the probe exhibited 223-fold enhancement in fluorescence intensity by a Michael addition of cysteine to the maleimide appended to a chromenoquinoline. Cell permeability and live cell imaging of thiols are also demonstrated.
Kelsey Jessica S - - 2012
The ampA gene plays a role in Dictyostelium discoideum cell migration. Loss of ampA function results in reduced ability of growing cells to migrate to folic acid and causes small plaques on bacterial lawns, while overexpression of AmpA results in a rapid-migration phenotype and correspondingly larger plaques than seen with ...
Nakano Ayako - - 2012
Hexokinase II (HKII), a key enzyme of glycolysis, is widely over-expressed in cancer cells. However, HKII levels and its roles in ATP production and ATP-dependent cellular process have not been well studied in hematopoietic malignant cells including multiple myeloma (MM) cells. We demonstrate herein that HKII is constitutively over-expressed in ...
Babich H - - 2012
A cranberry juice extract (CJE), rich in proanthocyanidins, had weak prooxidant properties, generating low levels of hydrogen peroxide (H(2) O(2) ) and superoxide. Generation of H(2) O(2) was pH dependent, increasing at alkaline pH, and was lowered in the presence of catalase and, to a lesser extent, of superoxide dismutase ...
Kavya K C - - 2012
Chitosan, a natural polymer, is a biomaterial which is known to be osteoconductive but lacking in mechanical strength. In this work, to further enhance the mechanical property and biocompatibility of chitosan, we combined it with both chondroitin sulfate, a natural glycosaminoglycan found in bone, and nano-SiO2. The composite scaffold of ...
Arakaki Makiko - - 2012
Epithelial-mesenchymal interactions regulate the growth and morphogenesis of ectodermal organs such as teeth. Dental pulp stem cells (DPSCs) are a part of dental mesenchyme, derived from the cranial neural crest, and differentiate into dentin forming odontoblasts. However, the interactions between DPSCs and epithelium have not been clearly elucidated. In this ...
Trcek Tatjana T Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, New York, - - 2012
Fluorescent in situ hybridization (FISH) allows the quantification of single mRNAs in budding yeast using fluorescently labeled single-stranded DNA probes, a wide-field epifluorescence microscope and a spot-detection algorithm. Fixed yeast cells are attached to coverslips and hybridized with a mixture of FISH probes, each conjugated to several fluorescent dyes. Images ...
Rickelt Steffen - - 2012
Within the characteristic ensemble of desmosomal plaque proteins, the armadillo protein plakophilin-2 (Pkp2) is known as a particularly important regulatory component in the cytoplasmic plaques of various other cell-cell junctions, such as the composite junctions (areae compositae) of the myocardiac intercalated disks and in the variously-sized and -shaped complex junctions ...
Kudo Kentaro - - 2012
Fluorosolvatochromic probes have recently attracted interest for live cell imaging. We recently tested our quinoxaline-based fluorosolvatochromic probes, PQX and MPQX, for in vivo imaging applications. PQX and MPQX are characterized by donor (pyrrole site)-acceptor (quinoxaline site) structure, and the peak emission wavelength of these compounds varies over the visible wavelength ...
Goh Tatsuaki - - 2012
In most dicot plants, lateral root (LR) formation, which is important for the construction of the plant root system, is initiated from coordinated asymmetric cell divisions (ACD) of the primed LR founder cells in the xylem pole pericycle (XPP) of the existing roots. In Arabidopsis thaliana, two AUXIN RESPONSE FACTORs ...
Saha Swati - - 2012
When leu (-) auxotrophs of Escherichia coli, after UV irradiation, were grown at temperatures between 30 and 47°C, the frequency of UV-induced mutation from leu (-) to leu (+) revertant increased as the UV dose and the temperature increased. For cells exposed to a UV dose of 45 J/m(2), the mutation ...
Lee Baek-Hee BH Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 3723, - - 2012
For cell transplantation into damaged tissues, viable cells must be delivered to the defect site in a suitable carrier. However, the hypoxic and nutrient-limited environment in the carrier can induce massive cell death. The aims of this study were to increase the viability and regulate the behavior of osteoprogenitor cells ...
Imagawa Hiroshi - - 2012
The syntheses of several neovibsanin derivatives were carried out in order to elucidate the simple structure required for displaying neurite outgrowth activity. In addition, a fluorescent probe molecule was synthesized and the analysis of its behavior in the PC12 cell line showed that the neovibsanins accumulate on the outer edge ...
Chávez de Paz Luis E - - 2012
The development of multispecies biofilm models are needed to explain the interactions that take place in root canal biofilms during apical periodontitis. The aim of this study was to investigate the ability of 4 root canal bacteria to establish a multispecies biofilm community and to characterize the main structural, compositional, ...
Kassas Nawal - - 2012
In addition to forming bilayers to separate cellular compartments, lipids participate in vesicular trafficking and signal transduction. Among others, phosphatidic acid (PA) is emerging as an important signaling molecule. The spatiotemporal distribution of cellular PA appears to be tightly regulated by localized synthesis and a rapid metabolism. Although PA has ...
Tsuda Hiromasa - - 2012
Cell death occurs in physiological conditions and as a result of injury or disease. Programmed cell death has an important role in the development and homeostasis of human tissue. Aberrant regulation of this process is thought to cause numerous diseases, including developmental disorders, neurodegenerative disease, and cancer. Apoptosis is the ...
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