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 Results 351 - 400 of 1866 < 3 4 5 6 7 8 9 10 11 12 13 > 351 Jacobsen Nicklas Raun - - 2008 Viability, cell cycle effects, genotoxicity, reactive oxygen species production, and mutagenicity of C(60) fullerenes (C(60)) and single-walled carbon nanotubes (SWCNT) were assessed in the FE1-Mutatrade markMouse lung epithelial cell line. None of these particles induced cell death within 24 hr at doses between 0 and 200 microg/ml or during long-term ... 352 Su Jie - - 2008 The pharmacokinetics of all-trans-retinoic acid (ATRA), an anti-cancer drug was highly variable due to its poor aqueous solubility. In this study, we investigated the pharmacokinetics of ATRA in male Wistar rats following intravenous administration of the ATRA loaded tributyrin emulsion. In vitro, the ATRA emulsion was proved binding to apolipoprotein(s). ... 353 Hirano Yu - - 2008 Antifreeze proteins (AFPs) can bind to the surface of ice crystals and have also been suggested to protect cells from hypothermic damage. The present study reports that type III AFPs from notched-fin eelpout, Zoarces elongatus Kner, can protect cells during hypothermic storage. This fish naturally expresses at least 13 isoforms ... 354 Colorni A - - 2008 Abstract The antiparasitic effects of piscidin 2, an antimicrobial polypeptide (AMPP) first isolated from mast cells of hybrid striped bass, were tested against three protistan ectoparasites of marine fish (the ciliates Cryptocaryon irritans and Trichodina sp., and the dinoflagellate Amyloodinium ocellatum) and one ciliate ectoparasite of freshwater fish (Ichthyophthirius multifiliis). ... 355 Montgomery, Sarah Lynn The objective of the proposed research is to design an experimental setup to assess the ability of impedance measurements to characterize mouse embryonic stem cell (ESC) and embryoid body (EB) growth and differentiation. Existing quality assurance measurements used to stage the growth and differentiation of embryoid bodies are labor intensive ... 356 Burbano R R - - 2009 The leukemia cell line HL60 is widely used in studies of the cell cycle, apoptosis, and adhesion mechanisms in cancer cells. We conducted a focused cytogenetic study in an HL60 cell line, by analyzing GTG-banded chromosomes before and after treatment with pisosterol (at 0.5, 1.0, and 1.8 microg/ml), a triterpene ... 357 da Frota Mario Luiz Conte ML - - 2009 Marine sponges have been prominently featured in the area of cancer research. Here, we examined the anti-proliferative effects of crude extracts (aqueous and organic) of the Brazilian marine sponge Polymastia janeirensis in the U138MG human glioma cell line. Moreover, we examined the effects of extracts on selective cytotoxicity in the ... 358 Flisfisch S - - 2008 AIMS: To assess whether a short exposure of Candida albicans to commonly used fluorides would affect growth, cell surface hydrophobicity, and adherence to buccal epithelial cells. METHODS: Candida albicans ATCC 90028 and 11 clinical isolates were used. Minimal inhibitory concentrations (MICs) of sodium fluoride (NaF) and of an amine fluoride ... 359 Cehreli S Burcak - - 2008 Casein phosphopeptides (CPP) are derived from casein, which accounts for 80% of the total protein in bovine milk . The purpose of this in vitro study was to evaluate the potential use of a CPP-amorphous calcium phosphate (CPP-ACP) preparation as a transport medium for avulsed teeth. L929 fibroblastic cell line ... 360 Kobayashi Shigeru - - 2008 Aggrecan concentration falls markedly during cartilage and disc degeneration with unfortunate biomechanical and physiological consequences. There is thus now an increasing interest in developing biological methods for its replacement. One approach is to stimulate aggrecan and hence glycosaminoglycan (GAG) production by resident cells through growth factor or genetic engineering. Another ... 361 Suzuki Takahiro - - 2008 Recent studies have found alterations to clock genes in several forms of cancer. Period (Per) gene plays an important role in the circadian system, the cell cycle, the induction of apoptosis, and DNA damage. However, the functions of Per in pancreatic cancer have not yet been elucidated. Here, we show ... 362 Galesi Adriana L L - - 2008 Drosophila melanogaster Schneider 2 (S2) cells have been increasingly used as a suitable expression system for the production of different recombinant proteins, and the employment of bioreactors for large-scale culture is an important tool for this purpose. In this work, Drosophila S2 cells producing the rabies virus glycoprotein RVGP were ... 363 Kernt Marcus - - 2008 PURPOSE: To investigate the safety of moxifloxacin for intravitreal application in a cell culture model. SETTING: Department of Ophthalmology, Ludwig-Maximilians-Universität, Munich, Germany. METHODS: Primary human retinal pigment epithelium (RPE) cells, ARPE19 cells, and primary optic nerve head astrocyte (ONHA) cells were treated with concentrations of moxifloxacin ranging from 10 to ... 364 Pamboukian Marilena Martins - - 2008 Specific respiration rate ( [Formula: see text]) is a key parameter to understand cell metabolism and physiological state, providing useful information for process supervision and control. In this work, we cultivated different insect cells in a very controlled environment, being able to measure [Formula: see text]. Spodoptera frugiperda (Sf9) cells ... 365 Daniel, Juliana Feijó de ... The biflavones 7,7"-dimethyllanaraflavone (1), agathisflavone (2), and 7"-methylagathisflavone (3) isolated from the leaves of Ouratea   and luxenchalcone (4) isolated from the leaves and branches of Luxemburgia   , as well as a mixture of 7,7"-dimethyllanaraflavone and 7"-methylagathisflavone, were assayed against HT-29 colon adenocarcinoma, NCl-H460 non-small cell lung carcinoma, MCF-7 ... 366 D'Antoni Michelle L - - 2008 Proteoglycans (PG) are altered in the asthmatic airway wall. Because PGs are known to affect cell proliferation and apoptosis, we hypothesized that alterations in PG might influence the airway smooth muscle (ASM) hyperplasia observed in the asthmatic airway. Human ASM cells were seeded on plastic or plates coated with decorin ... 367 Sun Fengrong - - 2008 Vibrio harveyi has been reported to enter into a viable but nonculturable (VBNC) state. Two clinical V. harveyi strains, SF1 and CW2, and the type strain, VIB295(T), were incubated in sterilized seawater at 4 degrees C. Plate counts in these strains declined to undetectable levels (<0.1 CFU mL(-1)) within 69, ... 368 Lee, Jeong-Rai Colostrum basic proteins (CBP) (MW 1$\sim$30 kDa) were isolated from bovine colostrum using a series of ultrafiltration processes and their effects on osteoblast cell proliferation and bone metabolism were investigated in cell line and animal models. Treatments with CBP (1, 10, 100 $\mu$g/mL) dose-dependently increased cell proliferation of osteoblastic MC3T3 ... 369 Lee, Joon-Kyoung Echinacea, also blown as the purple coneflower, is a herbal medicine that has been used for centuries, customarily as a treatment for the common cold, coughs, bronchitis, upper respiratory infections, and some inflammatory conditions. We investigated the effects of methanol extracts of Echinacea angustifolia on the cytotoxicity against cancer cells ... 370 Devi, R. Sub-lethal toxicity of lead nitrate solution (46.25mg/L, 5% of 96h LC50 value) on the air-breathing organ (suprabranchial chamber) of Channa striata was analysed for 60 days. Because air-breathing organs of C. striata remain in direct contact with waterborne xenobiotics, any change in the aquatic ecosystem was directly reflected in them. ... 371 Escamilla-Gómez Vanessa - - 2008 An amperometric immunosensor for the quantification of Staphylococcus aureus based on the coimmobilization of rabbit immunoglobulin G (RbIgG) and tyrosinase on a mercaptopropionic acid self-assembled monolayer modified gold electrode is reported. A competitive mode in which protein-A-bearing S. aureus cells and antiRbIgG labeled with alkaline phosphatase (AP) compete for the ... 372 Gowhar Shafi We tried to find out the cytotoxic and anticancer property of methanolic extract of N. sativa seeds against prostate cancer cells (PC3). A concentration range of extract (100-0.01 ÃŽÂ¼g mL-1) in culture medium (DMEM) was tested. Inhibition of colony formation was studied and microscopic observations of stained colonies were performed. ... 373 Olga Zeni The single-wall carbon nanotubes (SWCNTs) are one of the new materials ofemerging technologies. They are becoming increasingly studied for the possibleapplications in electronics, optics and biology. In particular, very promising fields ofapplication are the development of optical biosensors and the intracellular drug delivery.Nevertheless, there is a paucity of information on ... 374 Yang Fangxing - - 2008 As the active metabolites of polychlorinated biphenyl (PCBs), hydroxylated polychlorinated biphenyls (OH-PCBs) are found in wildlife and human tissues. They have been proposed as main contributors for endocrine disruption of PCBs in living organisms. In this study, mono-ortho PCB 156 and its hydroxylated metabolites 4'-OH-PCB 159, 4'-OH-PCB 121, and 4'-OH-PCB ... 375 Gelderman Monique P - - 2008 We studied the effects of a C60 water suspension at 4 microg/mL (nC60) and the water soluble fullerenol C60(OH)24 at final concentrations of 1-100 microg/mL on human umbilical vein endothelial cells (HUVECs) in culture. We found that a 24 hr treatment of HUVECs with C60(OH)24 at 100 microg/mL significantly increased ... 376 Kirstein Mark N - - 2008 Data are lacking for an optimal infusion length for oxaliplatin administered intraperitoneally. Our objectives were to establish the roles of hyperthermia and an effective length of oxaliplatin treatment in maximizing antitumor activity. SW620 cells were treated for 0.5 vs. 2 h and at 37 vs. 42 degrees C. Cytotoxicity, cell ... 377 Wolfe Margaret - - 2008 We have developed protocols whereby a total of 30-90 x 10(6) hMSCs with an average viability greater than 90% can be produced in a single multilevel Cell Factory from a relatively small (1-3 mL) bone marrow aspirate in 14-20 d. It is possible to generate as many as 5 x ... 378 Wang Pan - - 2008 It was the aim of this study to investigate the ultrasonically induced cytotoxic effect of hematoporphyrin (Hp) on isolated sarcoma 180 (S180) cells and to explore the potential biological mechanism of this action. S180 tumor cells suspended in air-saturated phosphate-buffered saline (pH 7.2) were exposed to ultrasound at 1.6 MHz ... 379 Basha Osama M - - 2008 C-Phycocyanin (C-Pc) is one of the major biliprotein pigments of unicellular cyanbacterium of Spirulina platenesis, it has nutritional, medicinal, and hepatoprotectant application. The growth and multiplication of human hepatoma cell lines (HepG2) under the effect of different concentrations of C-PC (0.8, 1.75, 3.5 and 7.0 microg/ml) against untreated cells as ... 380 Ahmad Muhammad S - - 2008 The environmental impact of metal complexes such as organotin(IV) compounds is of increasing concern. Genotoxic effects of organotin(IV) compounds (0.01 mug/ml, 0.1 mug/ml or 1.0 mug/ml) were measured using the alkaline single-cell gel electrophoresis (comet) assay to measure DNA single-strand breaks (SSBs) and the cytokinesis-block micronucleus (CBMN) assay to determine ... 381 Cools-Lartigue Jonathan J - - 2008 PURPOSE: Uveal melanoma (UM) is the most common intra-ocular tumor in adults. Despite advances in diagnosis and treatment, the survival rate of UM has not increased in the last several decades. Approximately 50% of patients will die as a consequence of metastatic disease with the majority of metastases localized to ... 382 Wu Xia - - 2008 Reprogramming impairment of DNA methylation may be partly responsible for the low efficiency in somatic cell nuclear transfer. In this study, bovine fibroblast cells were transfected with enhancer green fluorescence protein (eGFP), and then treated with a histone-deacetylase inhibitor, trichostatin A (TSA). The results showed that the effect of TSA ... 383 Okamoto Kazuo - - 2008 We have designed a new type of retinal prosthesis with a photoelectric dye that transfers photon energy to generate electric potentials. The purpose of this study was to test the safety of a photoelectric dye, 2-[2-[4-(dibutylami no)phenyl]ethenyl]-3-carboxymethylbenzothiazolium bromide (NK-5962), used for retinal prostheses. The retinal cells, derived from chick neurosensory ... 384 Feizzadeh Behzad - - 2008 INTRODUCTION: Saffron has been suggested to have inhibitory effects on tumoral cells. We evaluated the cytotoxic effect of aqueous extract of saffron on human transitional cell carcinoma (TCC) and mouse non-neoplastic fibroblast cell lines. MATERIALS AND METHODS: Human TCC 5637 cell line and mouse fibroblast cell line (L929) were cultivated ... 385 Stief Thomas W - - 2009 Lipopolysaccharides at approximate plasma reactivities >3 ng/mL or beta-glucans at >0.5-1 Amicrog/mL are toxic for human blood; lipopolysaccharide interacts with membrane components of susceptible cells (eg, monocytes) activating phospholipase A(2) that destroys the cell membrane. Cell fragments (microparticles or DNA) possess polynegative niches that activate intrinsic hemostasis. Pathologic disseminated intravascular ... 386 Benites Julio - - 2008 2-euryfuryl- and 2-euryfuryl-3-nitro-1,4-benzoquinone Q2 and Q3, prepared via oxidative coupling reactions of sesquiterpene euryfuran 1 to 2-nitro-1,4-benzoquinone and 1,4-benzoquinone, were tested for their cytotoxicity towards TLT cells (a murine hepatoma cell line) in the absence and in the presence of vitamin C. Their cytotoxic profile was completely different. In cells ... 387 He Lei - - 2007 The embryo of Ceriops tagal was extracted with 95% ethanol at room temperature, and four triterpenes (1-4) were separated from this extract. For the first time these triterpenes were the separated from this plant. Compounds (1-4) were tested in vitro for antitumor activity against three cell lines (human liver cancer ... 388 Johnson George E - - 2008 A complete hazard and risk assessment of any known genotoxin requires the evaluation of the mutagenic, clastogenic and aneugenic potential of the compound. In the case of aneugenic chemicals, mechanism of action (MOA) and quantitative responses may be investigated by studying their effects upon the fidelity of functioning of components ... 389 Al-Akoum Mahéra - - 2007 Breast cancer cell cultures were exposed to different concentrations of black cohosh, estradiol (E2), and tamoxifen to examine the effect on cell proliferation; cytotoxicity was assessed by using sulforhodamine B (SRB) dye solution. E2 (10(-10) - 10(-8) mol/L) markedly stimulated the proliferation of MCF-7 cells (p < 0.01). Tamoxifen stimulated ... 390 Cushnie T P T - - 2007 AIM: The flavonol galangin, an antimicrobial constituent of the traditional medicines propolis and Helichrysum aureonitens, is being assessed as part of an ongoing investigation into the antibacterial activity of flavonoids. The present study sought to establish whether galangin has any aggregatory effect on bacterial cells. METHODS AND RESULTS: In preparatory ... 391 Kitts David D - - 2007 Pure ginsenoside standards (saponins Rh2, PD, and PT), along with an Rh2-enhanced North American ginseng (Panax quinquefolius) leaf extract (LFRh2), were tested for cytotoxic activity in cultured THP-1 leukemia cells. Thermal treatment of ginseng leaf resulted in production of both Rh2 and Rg3 content that was confirmed by liquid chromatography ... 392 aalster and tzohary This is probably the most abundant very small (3-5 um diameter) single-celled species in the lake, at times reaching 3000-5000 cells/ml. Erkenia can occur in the water at all times of the year although it tends to be more abundant in winter. In addition to the small cell size and ... 393 Kawahara Shuhei - - 2007 PURPOSE: To investigate the intracellular events in retinal glial cells exposed to indocyanine green (ICG) and brilliant blue G (BBG). METHODS: The human Müller cell line MIO-M1 was exposed to a low dose (0.25 mg/mL) and a clinical dose (2.5 mg/mL) of ICG and a clinical dose (0.25 mg/mL) of ... 394 Nascimento Juliana Minardi - - 2007 Bothrops snake venoms cause renal damage, with renal failure being the main cause of death in humans bitten by these snakes. In this work, we investigated the cytoskeletal rearrangement and cytotoxicity caused by Bothrops alternatus venom in cultured Madin-Darby canine kidney (MDCK) cells. Incubation with venom (10 and 100 microg/mL) ... 395 aalster and tzohary This small (cells: 4-9.5um) chlorophyte, is usually rare in the plankton of Lake Kinneret, but formed significant blooms exceeding 1000 cells/mL in winter 1997 and again in winter 2000. The cells are triangular with one rounded side and organized in fours so that each coenobium of 4 triangles forms a ... 396 aalster and tzohary This is the most abundant and common pennate diatom of Lake Kinneret. The species was first described in 1996 based on material from Lake Kinneret, to the best of our knowledge until today is was not reported to occur anywhere else. It appears in many morphotypes, hence its name. It ... 397 Heiser Philip - - 2007 Cytotoxic effects on neuronal as well as on immune cells have been reported for both typical and atypical antipsychotic drugs. We evaluated the effects of different concentrations of a typical (haloperidol) and two atypical (clozapine, olanzapine) antipsychotics on the survival of human neuronal (SH-SY5Y cells) and immune cells (U937 cells) ... 398 Antoci Valentin V - - 2007 Antibiotic concentrations associated with antibiotic bone cements may cause skeletal cell toxicity and prevent fracture healing. We investigated toxicity effects of dose and treatment time after exposure to three antibiotics commonly used in orthopaedic local drug delivery systems. We hypothesized a threshold exists for toxicity of osteoblasts and chondrocytes after ... 399 Urbanska Aleksandra Malgorzata - - 2007 Targeted delivery of live microencapsulated bacterial cells has strong potential for application in treating various diseases, including diarrhea, kidney failure, liver failure, and high cholesterol, among others. This study investigates the potential of microcapsules composed of two natural polymers, alginate and chitosan (AC), and the use of these artificial cells ... 400 Simpkins Cuthbert O - - 2007 BACKGROUND: We previously demonstrated that the degradation of a suspension of Jurkat cells in Ringer's lactate (RL) was inhibited by the addition of a 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid/Tris buffer. Given the ability of histidine to buffer protons in the physiologic range (pKa = 6.0), we hypothesized that this amino acid would have ... < 3 4 5 6 7 8 9 10 11 12 13 >