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Results 51 - 100 of 1921
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Jones Robert P - - 2012
Purpose: This study assessed the relationship between time, power and ablation size using a novel high-frequency 14.5 GHz microwave applicator in ex vivo human hepatic parenchyma and colorectal liver metastases. Previous examination has demonstrated structurally normal but non-viable cells within the ablation zone. This study aimed to further investigate how ablation ...
Zhao C-M - - 2012
The term "enterochromaffin cell" was introduced more than 100 years ago. The cells that are morphologically similar to the enterochromaffin cells have been referred to as "enterochromaffin-like cells". One of the enterochromaffin-like cell populations in the oxyntic mucosa of stomach is known to produce and store histamine and chromogranin A, ...
Cui Jiu-Wei - - 2012
Purpose: PRIL (proliferation-inducing ligand) is a newly identified member of the tumor necrosis factor (TNF) family and modulates death ligand-induced apoptosis. Here, we investigated the effect of PRIL on cellular characteristics relating to tumor progression in human gastric cancer. Method: Recombinant lentivirus containing APRIL siRNA was constructed and then infected ...
De Milito Angelo - - 2012
It is becoming increasingly acknowledged that tumorigenesis is not simply characterized by the accumulation of rapidly proliferating, genetically mutated cells. Microenvironmental biophysical factors like hypoxia and acidity dramatically condition cancer cells and act as selective forces for malignant cells, adapting through metabolic reprogramming towards aerobic glycolysis. Avoiding intracellular accumulation of ...
Xue Sheng-Neng - - 2012
To explore the effects of the high expression of MMP9 on biological behaviors of fibroblasts. High glucose and hyperhomocysteine were used to induce MMP9 expression in skin fibroblasts. Cell proliferation was detected by flow cytometry and cell viability by CCK-8. ELISA assay was used to detect collagen (hydroxyproline) secretion. Scratch ...
Zhang Junjie - - 2012
To investigate the effects of bone morphogenetic protein-2 (BMP-2) on the proliferation, differentiation and apoptosis of normal human gastric mucosal cells and gastric cancer cells. Poorly differentiated gastric cancer BGC823 cells, moderately differentiated gastric cancer cells and normal human gastric mucosal epithelial GES-1 cells were independently treated with recombinant human ...
Zhu Yongliang - - 2012
CagA of Helicobacter pylori is a bacterium-derived oncogenic protein closely associated with the development of gastric cancers. MicroRNAs (miRNAs) are a class of widespread non-coding RNAs, many of which are involved in cell growth, cell differentiation and tumorigenesis. The relationship between CagA protein and miRNAs is unclear. Using mammalian miRNA ...
Biswas Raja - - 2012
Wall teichoic acid (WTA) or related polyanionic cell wall glycopolymers are produced by most gram-positive bacterial species and have been implicated in various cellular functions. WTA and the proton gradient across bacterial membranes are known to control the activity of autolysins but the molecular details of these interactions are poorly ...
Ureshino Hiroki - - 2012
Our recent study demonstrated that higher expression of N-myc downregulated gene 1 (NDRG1) is closely correlated with poor prognosis in gastric cancer patients. In this study, we asked whether NDRG1 has pivotal roles in malignant progression including metastasis of gastric cancer cells. By gene expression microarray analysis expression of NDRG1 ...
Sycuro Laura K - - 2012
Helical cell shape of the gastric pathogen Helicobacter pylori has been suggested to promote virulence through viscosity-dependent enhancement of swimming velocity. However, H. pylori csd1 mutants, which are curved but lack helical twist, show normal velocity in viscous polymer solutions and the reason for their deficiency in stomach colonization has ...
Johnson Elizabeth M EM Department of Medicine, Vanderbilt University School of Medicine Nashville, TN, - - 2012
Helicobacter pylori lives within the mucus layer of the human stomach, in close proximity to gastric epithelial cells. While a great deal is known about the effects of H. pylori on human cells and the specific bacterial products that mediate these effects, relatively little work has been done to investigate ...
Yang Hyekyung - - 2011
Regardless of the etiology, cellular death of the liver parenchymal hepatocyte seems to be a primary event of hepatic fibrogenesis, which ultimately results in hepatic stellate cell (HSC) activation and the synthesis of extracellular matrix proteins. Recently it has been demonstrated that hepatic fibrosis can be a reversible process when ...
Hobbie K R - - 2011
Small fish models have been used for decades in carcinogenicity testing. Demonstration of common morphological changes associated with specific mechanisms is a clear avenue by which data can be compared across divergent phyletic levels. Dimethylnitrosamine, used in rats to model human alcoholic cirrhosis and hepatic neoplasia, is also a potent ...
Won Kyu Yeoun - - 2011
AIMS:: The interactions between the receptor activator of NF-κB (RANK), its ligand (RANKL), and the decoy receptor for RANKL, osteoprotegerin (OPG), play a pivotal role in promoting osteoclast differentiation and activation leading to bone resorption. Giant cell tumours, chondroblastomas, and aneurysmal bone cysts harbour osteolytic lesions containing osteoclast-like giant cells. ...
Mozumder Mohammad Sayem - - 2011
Novel polymeric powder coatings (PPC) were prepared by ultrafine powder coating technology and shown to support human mesenchymal cell attachment and growth. PPC surfaces enriched with nano-TiO(2) (nTiO(2)) showed enhanced cellular responses, and were compared to commercially pure titanium (cpTi). After cell attachment and growth, osteogenic differentiation and bone matrix ...
Choi Eun Mi - - 2011
Apocynin is a naturally occurring methoxy-substituted catechol, experimentally used as an inhibitor of NADPH-oxidase. In the present study, we investigated the protective effects of apocynin on antimycin A (AMA)-induced toxicicy in osteoblastic MC3T3-E1 cells. Exposure of MC3T3-E1 cells to AMA caused significant cell viability loss, as well as mitochondrial membrane ...
Pignolo Robert J - - 2011
The aim of this review is to provide a critical reading of recent literature pertaining to the presence of circulating, fluid-phase osteoblastic cells and their possible contribution to bone formation. We have termed this group of cells collectively as circulating osteogenic precursor (COP) cells. We present evidence for their existence, ...
Chen C C CC Department of Dentistry, Chung Shan Medical University Hospital, Taichung City, - - 2011
To evaluate human dental pulp cell responses to radiopaque dicalcium silicate cement and white-coloured mineral trioxide aggregate (WMTA). Flow cytometry was employed to quantify the phase percentage of pulp cell cycle. Alamar Blue was used for real-time and repeated monitoring of cell proliferation. Reverse transcription-polymerase chain reaction was performed to ...
Catros Sylvain - - 2011
Developing tools to reproduce and manipulate the cell micro-environment, including the location and shape of cell patterns, is essential for tissue engineering. Parallel to inkjet printing and pressure-operated mechanical extruders, laser-assisted bioprinting (LAB) has emerged as an alternative technology to fabricate two- and three-dimensional tissue engineering products. The objective of ...
Yang Lei - - 2011
An increasing number of studies have demonstrated the positive role nanotopographies can have toward promoting various cell functions. However, the relevant mechanism(s) behind this improvement in biological interactions at the cell-material interface is not well understood. For this reason, here, osteoblast (bone forming cell) functions (including adhesion, proliferation, and differentiation) ...
Jung Hyun-Sung - - 2011
It is known that the dental follicle (DF) consists of progenitor cells that give rise to the cementum, periodontal ligament, and alveolar bone; but little information is available about the regulation of DF cell differentiation into either cementogenic or osteogenic cell lineages for the regeneration of diseased periodontal tissue. Here, ...
Graf Hans-Ludwig - - 2011
One of the effects observed during several screening studies for osteocompatibility in vitro was that cells derived from the upper and lower jaw exhibited distinct differences regarding proliferation. Therefore, the aim of this study was to examine systematically whether a single osteoblast possesses abilities which are specific to the upper ...
Kubo Izumi - - 2011
Jurkat cells were trapped in the microchambers of a novel disk-shaped cell separation device and stained with Cellstain. Approximately 90% of the cells were living. Single cells were isolated with a branching microchannel after rotation at 4500rpm for 30s, demonstrating that a living single cell could be trapped in the ...
Palaiologou Archontia - - 2012
Titanium implants are widely used in dentistry to replace lost teeth. Various surface modifications have been used to improve implant retention and osseointegration. This study is designed to compare the ability of three titanium surfaces to promote cell attachment and cell motility of cells relevant to periodontal tissues. Three clinically ...
Kelly Geraldine M - - 2011
The mechanical properties of cells are reported to be regulated by a range of factors including interactions with the extracellular environment and other cells, differentiation status, the onset of pathological states, as well as the intracellular factors, for example, the cytoskeleton. The cell cycle is considered to be a well-ordered ...
Komaki Motohiro - - 2011
Cementum is a calcified tissue covering the tooth root surface, which functions as rigid tooth-anchoring structure. Periodontal ligament is a unique non-mineralized connective tissue, and is a source of mineralized tissue forming cells such as cementoblasts and osteoblasts. The CEMP1 is a novel cementum component the presence of which appears ...
Perez R A - - 2011
Collagen-hydroxyapatite (HA) scaffolds for the non-viral delivery of a plasmid encoding the osteoinductive protein bone morphogenetic protein (BMP)-7 were developed. The collagen-HA was obtained by the combination of calcium phosphate cement in a collagen template. The effect on cell behavior of increasing amounts of HA in the scaffolds was evaluated. ...
Fujiwara Yukio - - 2011
Because foam cell formation in macrophages is believed to play an essential role in the progression of early atherosclerotic lesions in vivo, prevention of foam cell formation is considered one of the major targets for the treatment of atherosclerosis. In the present study, we examined the inhibitory effect of 50 ...
Heberer Susanne - - 2011
Purpose: The aim of the present clinical study was the evaluation of the osteogenic potential of mesenchymal cells embedded in the provisional matrix of non-augmented and with Bio-Oss collagen-augmented human extraction sockets after 6 weeks of healing time. Methods: Twenty-five patients with 47 extraction sites participated in the present study. ...
Kato Kenji - - 2011
We have previously reported that various stimuli, including sphingosine 1-phosphate, are able to induce heat shock protein (HSP) 27 in osteoblast-like MC3T3-E1 cells. However, the precise role of HSP27 in bone metabolism has not been satisfactory clarified. In this study, we investigated the effect of HSP27 on osteocalcin synthesis induced ...
Lungová Vlasta - - 2011
The first mouse molar (M1) is the most common model for odontogenesis, with research particularly focused on prenatal development. However, the functional dentition forms postnatally, when the histogenesis and morphogenesis of the tooth is completed, the roots form and the tooth physically anchors into the jaw. In this work, M1 ...
Tong Ho-Wang - - 2011
While electrospinning is an effective technology for producing poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) micrometre-scale fibrous scaffolds for tissue regeneration, electrospinning of PHBV fibrous scaffolds composed of sub-micrometre fibres, surface-porous fibres or nanocomposite fibres is rarely explored. In this study, the average PHBV fibre diameter was successfully reduced to the sub-micrometre scale by dissolving ...
Tavassol Frank - - 2011
The implantation of tissue-engineered constructs leads to hypoxic and physical stress to the seeded cells until they were reached by a functional microvascular system. Preconditioning of cells with heat shock induced heat shock proteins (HSP), which can support the cells to survive a subsequent episode of stress that would otherwise ...
Ulbrich Stefan - - 2011
We investigated attachment and migration of human retinal pigment epithelial cells (primary, SV40-transfected and ARPE-19) on nanoscopically defined, two-dimensional matrices composed of parallel-aligned collagen type I fibrils. These matrices were used non-cross-linked (native) or after riboflavin/UV-A cross-linking to study cell attachment and migration by time-lapse video microscopy. Expression of collagen ...
Dí Az-Rodrí Guez Lourdes - - 2011
Nonsteroidal anti-inflammatory drugs (NSAIDs) are among the most widely prescribed drugs worldwide and serve as treatment of some degenerative inflammatory joint diseases. The aim of the present study was to investigate the influence of different concentrations of three NSAIDs on cell proliferation, differentiation, antigenic profile, and cell cycle in the ...
Maita Shinya - - 2011
INTRODUCTION: We investigated the inhibitory effect of sunitinib, a newly approved multitargeted tyrosine kinase inhibitor, against the progression of renal cell cancer (RCC) bone metastases in vivo. METHODS: In vitro cell proliferation was determined using the MTS assay. To investigate the inhibitory effects of sunitinib in vivo, we established luciferase-labeled ...
Wang Xinluan - - 2011
Drynaria fortunei (Kunze) J. Sm. is a traditional Chinese herb used for the treatment of osteoporosis and other bone metabolic disorders. Previous studies demonstrated that "small polar active fraction in Drynaria fortunei (SDF)"exerted osteoprotective effects in ovariectomized (OVX) mice. This study aims to investigate the constituents in SDF and systemically ...
Luk Frederick - - 2011
Osteosarcoma has been recently redefined as a differentiation disease and its investigation is hampered by broad and complex genetic alterations. Gene expression analysis of two human osteosarcoma cell lines that are dissimilar in tumour differentiation status and osteogenic property would advance our understanding of osteo-sarcomagenesis. Gene ontology classification, hierarchical clustering, ...
Rakkiettiwong Nitra - - 2011
INTRODUCTION: Vital pulp therapy might benefit from the sustained release of transforming growth factor beta-1 (TGF-β1) from dental restorative materials. Chitosan has previously been shown to enable sustained release of bovine serum albumin (BSA) from glass ionomer cement (GIC). Because BSA can prolong release of growth factor, chitosan-fluoroaluminosilicate GIC with ...
Osathanon Thanaphum - - 2011
There have been a number of attempts to modify the surface of dental implants to improve osseointegration. These modifications include alterations of surface chemistry and roughness. The purpose of this study was to examine the early response of human osteoblast-like cells placed on Ti-6Al-7Nb disks that had a similar grooved ...
Lemieux Justin M - - 2011
Dimethyl sulfoxide (DMSO) is routinely used in the laboratory as a solvent and vehicle for organic molecules. Although it has been used in previous studies involving myeloid cells and macrophages, we are unaware of data demonstrating the effects of DMSO alone on osteoclast development. Recently, we were using DMSO as ...
Shin Jong-Hwan - - 2011
A compact BrFAFC can directly convert formate to power without hydrogen storage and poisoning effect by CO at mild temperature. We are the first to establish the performance of the BrFAFC with high power density. Furthermore, this BrFAFC can be manufactured in a simple design for use in portable fuel ...
Wang Chunming - - 2011
Genipin has been widely used as a natural crosslinker to substitute chemical crosslinkers such as glutaraldehyde to crosslink various biomaterials like gelatin, collagen, and chitosan. However, there are contradicting views on the cytotoxicity and safety of genipin in tissue engineering. Therefore in this study, we aimed to evaluate the toxicity ...
Iwasaki Yoshiko - - 2011
Chronic kidney disease has a high level of oxidative stress, a phenomenon that is induced, at least in part, by the accumulation of uremic toxins. Several reports have revealed that indoxyl sulfate, one of the uremic toxins, accelerates oxidative stress in chronic kidney disease. On the other hand, it is ...
Zhang Qian - - 2011
Hyperplasia of the PTG underlies the secondary hyperparathyroidism (SHPT) observed in CKD, but the mechanism underlying this hyperplasia is incompletely understood. Because aberrant cyclooxygenase 2 (COX2) expression promotes epithelial cell proliferation, we examined the effects of COX2 on the parathyroid gland in uremia. In patients with ESRD who underwent parathyroidectomy, ...
Fernandez Juan Manuel - - 2011
Hydroxyapatite (HAP)-containing poly-ε-caprolactone (PCL)-polydiisopropyl fumarate (PDIPF) composite (Blend) was developed as an alternative for bone tissue engineering. The physicochemical, mechanical and biocompatibility properties of these composites were evaluated using two osteoblast-like cell lines (UMR106 and MC3T3E1) and compared with the blend without HAP and PCL/HAP films. The increment in the ...
Kihara Tasuku - - 2011
We investigated the effects of acerogenin A, a natural compound isolated from Acer nikoense Maxim, on osteoblast differentiation by using osteoblastic cells. Acerogenin A stimulated the cell proliferation of MC3T3-E1 osteoblastic cells and RD-C6 osteoblastic cells (Runx2-deficient cell line). It also increased alkaline phosphatase activity in MC3T3-E1 and RD-C6 cells ...
Yang Jae-Sik - - 2011
This study examined the cell response to a TiO2 nanotubular surface (Ti-NT) for future biomedical applications. The level of cell attachment and spreading at 20 min and 60 min was evaluated by SEM. IL-6 and PGE2 secretion was evaluated by ELISA. In SEM analysis, the Ti-NT surface had more fully ...
Rottmar Markus - - 2011
The process of bone remodeling is governed by mechanical stresses and strains. Studies on the effects of mechanical stimulation on cell response are often difficult to compare as the nature of the stimuli and differences in parameters applied vary greatly. Experimental systems for the investigation of mechanical stimuli are mostly ...
Hoppe Alexander - - 2011
Several inorganic materials such as special compositions of silicate glasses, glass-ceramics and calcium phosphates have been shown to be bioactive and resorbable and to exhibit appropriate mechanical properties which make them suitable for bone tissue engineering applications. However, the exact mechanism of interaction between the ionic dissolution products of such ...
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