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| ENNS,CAROLINE A. |
| Hereditary hemochromatosis (HH) is the most common inherited disorder in people of Northern European descent. Over 83% of the cases of HH result from a single mutation of a Cys to Tyr in the HH protein, HFE. This mutation causes a recessive disease resulting in an accumulation of iron in selected tissues. Iron overload damages these organs leading to cirrhosis of the liver, diabetes, cardiomyopathy, and arthritis. The mechanism by which HFE influences iron homeostasis in cells and in the body remains elusive. Lack of functional HFE in humans produces the opposite effects in different cell types in the body. In the early stages of the disease, Kupffer cells in the liver and enterocytes in the intestine cells are iron depleted and have low intracellular... |
| Tipo: Journal article |
Palavras-chave: Hereditary hemochromatosis; HFE; Iron overload; Iron homeostasis. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000100013 |
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| RIVAS,MARIELLA; SEEGER,MICHAEL; HOLMES,DAVID S; JEDLICKI,EUGENIA. |
| The genome of the acidophilic, proteobacterium Acidithiobacillus ferrooxidans, contains linked but divergently oriented genes, termed afeI and afeR, whose predicted protein products are significantly similar to the LuxI and LuxR families of proteins. A possible promoter and Lux box are predicted upstream of afeI. A cloned copy of afeI, expressed in E. coli, encodes an enzyme that catalyzes the production of a diffusible compound identified by gas chromatography and mass spectrometry as an unsubstituted N-acyl homoserine lactone (AHL) of chain length C14. This AHL can be detected by a reporter strain of Sinorhizobium meliloti Rm41 suggesting that it is biologically active. The reporter strain also responds to extracts of the supernatant of A. ferrooxidans... |
| Tipo: Journal article |
Palavras-chave: A. ferrooxidans; Quorum-sensing; LuxI and LuxR; Lux box; Homoserine lactone. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200018 |
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| Fakruddin,Md; Rahaman,Mizanur; Ahmed,Monzur Morshed; Hoque,Md Mahfuzul. |
| BACKGROUND: Cronobacter sakazakii is considered as an emerging foodborne pathogen. The aim of this study was to isolate and characterize virulent strains of Cronobacter sakazakii from food samples of Bangladesh. RESULT: Six (6) Cronobacter sakazakii was isolated and identified from 54 food samples on the basis of biochemical characteristics, sugar fermentation, SDS-PAGE of whole cell protein, plasmid profile and PCR of Cronobacter spp. specific genes (esak, gluA, zpx, ompA, ERIC, BOX-AIR) and sequencing. These strains were found to have moderately high antibiotic resistance against common antibiotics and some are ESBL producer. Most of the C. sakazakii isolates were capable of producing biofilm (strong biofilm producer), extracellular protease and... |
| Tipo: Journal article |
Palavras-chave: Cronobacter; Food; Virulent; Bangladesh. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100057 |
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| KOSOY,ANA; MÖLLER,CAROLINA; PERDOMO,DEISY. |
| Transducin (T), a GTP-binding protein involved in phototransduction of rod photoreceptor cells, is a heterotrimer arranged as two units, the a-subunit (Ta) and the bg-complex (Tbg). The role of the carboxyl groups in T was evaluated by labeling with N, N'-dicyclohexylcarbodiimide (DCCD) and 1-ethyl 3-(3-dimethylaminopropyl) carbodiimide (EDC). Only a minor effect on the binding of b, g-imido guanosine 5'-triphosphate (GMPpNp) to T was observed in the presence of the hydrophobic carbodiimide, DCCD. Similarly, the GMPpNp binding activity of the reconstituted holoenzyme was not significantly affected when Ta was combined with DCCD-treated Tbg. However, the binding of guanine nucleotides to the reconstituted T was ~50% inhibited when DCCD-labeled Ta was... |
| Tipo: Journal article |
Palavras-chave: Chemical modification; G-protein-coupled signaling; Group-specific labeling; Transducin; Visual process. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000300010 |
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| Amorim,Aline Teixeira; Marques,Lucas Miranda; Santos,Angelita Maria Oliveira Gusmão; Martins,Hellen Braga; Barbosa,Maysa Santos; Rezende,Izadora Souza; Andrade,Ewerton Ferraz; Campos,Guilherme Barreto; Lobão,Tássia Neves; Cortez,Beatriz Araujo; Monezi,Telma Alvez; Machado-Santelli,Glaucia Maria; Timenetsky,Jorge. |
| BACKGROUND: Bacterial pathogens have many strategies for infecting and persisting in host cells. Adhesion, invasion and intracellular life are important features in the biology of mollicutes. The intracellular location ofUreaplasma diversum may trigger disturbances in the host cell. This includes activation or inhibition of pro and anti-apoptotic factors, which facilitate the development of host damage. The aim of the present study was to associate U. diversum infection in HEp-2 cells and apoptosis induction. Cells were infected for 72hs with four U. diversum clinical isolates and an ATCC strain. The U. diversuminvasion was analyzed by Confocal Laser Scanning Microscopy and gentamicin invasion assay. The apoptosis was evaluated using pro-apoptotic and... |
| Tipo: Journal article |
Palavras-chave: Ureaplasma diversum; Invasion; Apoptosis; HEp-2 cells. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100038 |
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| Hernández-Salinas,Romina; Decap,Valerie; Leguina,Alberto; Cáceres,Patricio; Perez,Druso; Urquiaga,Ines; Iturriaga,Rodrigo; Velarde,Victoria. |
| BACKGROUND: Metabolic syndrome is a growing worldwide health problem. We evaluated the effects of wine grape powder (WGP), rich in antioxidants and fiber, in a rat model of metabolic syndrome induced by a high fructose diet. We tested whether WGP supplementation may prevent glucose intolerance and decrease oxidative stress in rats fed with a high fructose diet. METHODS: Male Sprague-Dawley rats weighing 180 g were divided into four groups according to their feeding protocols. Rats were fed with control diet (C), control plus 20 % WGP (C + WGP), 50 % high fructose (HF) or 50 % fructose plus 20 % WGP (HF + WGP) for 16 weeks. Blood glucose, insulin and triglycerides, weight, and arterial blood pressure were measured. Homeostasis model assessment (HOMA) index... |
| Tipo: Journal article |
Palavras-chave: Insulin resistance; Oxidative stress; Metabolic syndrome; Wine grape powder. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100053 |
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| ZHANG,YONG; HAN,TAO; ZHU,QING; ZHANG,WEI; BAO,WEI; FU,HAI-JING; YANG,JIE; HUANG,XIAO-JUN; WEI,JUN-XIA; MENG,YAN-LING; ZHAO,JING; CAO,YUN-XIN; JIA,LIN-TAO; YANG,AN-GANG. |
| Apoptosis-inducing factor (AIF) is a mitochondrial flavoprotein that mediates both NADH-oxidizing and caspase-independent apoptosis. Further, the proapoptotic activity of AIF is located in the C-terminus of AIF, although the precise minimum sequence responsible for apoptosis induction remains to be investigated. In the present study, we generated two truncated AIFs, AIFΔ1-480-FLAG, which is a FLAG-tagged C-terminal peptide comprising amino acids from 481 to 613, and AIF360-480 containing amino acids from 360 to 480 of AIF. We used confocal microscopy to demonstrate that both the truncated proteins are expressed and located in the cytoplasm of transfected cells. AIFΔ1-480 but not AIF360-480 induces apoptosis in transfected cells. We also... |
| Tipo: Journal article |
Palavras-chave: Apoptosis inducing factor (AIF); Apoptosis; Cytochrome c; Mitochondria; HER2. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200014 |
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| Pan,Zeya; Pan,Hao; Zhang,Jin; Yang,Yun; Liu,Hui; Yang,Yuan; Huang,Gang; Ni,Junsheng; Huang,Jian; Zhou,Weiping. |
| BACKGROUND: Ubiquitin Specific Peptidase 39 (USP39) is a 65 kDa SR-related protein involved in RNA splicing. Previous studies showed that USP39 is related with tumorigenesis of human breast cancer cells. RESULTS: In the present study, we investigated the functions of USP39 in human hepatocellular carcinoma (HCC) cell line SMMC-7721. We knocked down the expression of USP39 through lentivirus mediated RNA interference. The results of qRT-PCR and western blotting assay showed that both the mRNA and protein levels were suppressed efficiently after USP39 specific shRNA was delivered into SMMC-7721 cells. Cell growth was significantly inhibited as determined by MTT assay. Crystal violet staining indicated that colony numbers and sizes were both reduced after... |
| Tipo: Journal article |
Palavras-chave: Ubiquitin Specific Peptidase 39; Lentivirus; Human hepatocellular carcinoma; Cell proliferation; Cell cycle. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100018 |
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| Chen,Yijie; Ma,Lin; He,Qian; Zhang,Shaobo; Zhang,Chenghua; Jia,Wei. |
| BACKGROUND: Transforming growth factor (TGF)-β is involved in many physiologic processes, it often promotes metastasis, and its high expression is correlated with poor prognosis. In the present study, we analyzed the correlation between transforming growth factor beta 1 (TGF-β1) expression and prognosis in intrahepatic cholangiocarcinoma RESULTS: We examined the expression of TGF-β 1 in 78 intrahepatic cholangiocarcinomas by immunohistochemistry and correlated the expression with clinicopathological parameters. TGF-β1 was expressed in 37 of 78 (47.4 %) intrahepatic cholangiocarcinomas. The expression of TGF-β 1 was significantly correlated with lymph node metastasis, distant metastasis, and tumour recurrence.... |
| Tipo: Journal article |
Palavras-chave: Intrahepatic cholangiocarcinoma Transforming growth factor beta 1 (TGFβ -1) Prognosis. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100026 |
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| MORENO,ISABEL M; PEREIRA,PAULO; FRANCA,SUSANA; CAMEÁN,ANA. |
| This paper describes the occurrence of toxic cyanobacteria along the Guadiana River over its course between Mérida and Badajoz (Extremadura, Spain). Water sampling for phytoplankton quantification and toxin analysis was carried out regularly between 1999 and 2001 in six different locations, including two shallow, slow-flowing river sites, two streamed river sites and two drinking water reservoirs. The cyanobacterial community differed significantly between these locations, especially during the summer. The predominant genera were Microcystis, Oscillatoria, Aphanizomenon and Anabaena. Using an ELISA assay the total microcystin contents of natural water samples from the most eutrophic locations ranged from 0.10 _ 21.86 mg mcyst-LR equivalent·L-1 in... |
| Tipo: Journal article |
Palavras-chave: Cyanobacteria; Microcystins; Guadiana; Spain. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300006 |
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| FELMER,RICARDO N; CLARK,JOHN A. |
| The feasibility of ablating differentiated adipocytes and the mechanism of cell ablation with a suitable prodrug activating system is described. The system is based on the use of E. coli nitroreductase (NTR) enzyme that activates certain nitro compounds, such as the antitumor drug CB1954, into cytotoxic DNA interstrand cross-linking agents. Differentiated preadipocyte cells (3T3L1) transfected with an aP2 driven nitroreductase construct were efficiently killed after incubation with medium containing the prodrug CB1954, while untransfected cells were not affected. It was demonstrated that the mechanism of cell ablation is apoptosis and that the system has a bystander effect mediated by a toxic metabolite of the prodrug. The described system should provide a... |
| Tipo: Journal article |
Palavras-chave: Genetic ablation; NTR/CB1954; Adipocytes; Differentiation. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300009 |
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| Yuan,Feng; Wang,Junfeng; Zhang,Keshi; Li,Zhao; Guan,Zhenpeng. |
| Abstract Background Programmed cell death 5 (PDCD5) is an apoptosis-related gene cloned from TF-1 cells whose primary biological functions are to promote apoptosis and immune regulation. The effects and mechanisms exerted by key mediators of arthritic inflammation remain unclear in PDCD5 transgenic (PDCD5 tg) mice. Results In the current study, PDCD5 tg mice inhibited the progression of adjuvant-induced arthritis, specifically decreasing clinical signs and histological damage, compared with arthritis control mice. Additionally, the ratio of CD4+IFN-γ+ cells (Th1) and CD4+IL-17A+ cells (Th17), as well as the mRNA expression of the pro-inflammatory mediators IFN-γ, IL-6, IL-17A and TNF-α, were decreased in PDCD5 tg mice, while... |
| Tipo: Journal article |
Palavras-chave: Rheumatoid arthritis; Adjuvant-induced arthritis; Programmed cell death 5; T lymphocytes; Inflammatory cytokines. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100229 |
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| Monti,Manuela; Perotti,Cesare; Del Fante,Claudia; Cervio,Marila; Redi,Carlo Alberto. |
| The historical, lexical and conceptual issues embedded in stem cell biology are reviewed from technical, ethical, philosophical, judicial, clinical, economic and biopolitical perspectives. The mechanisms assigning the simultaneous capacity to self-renew and to differentiate to stem cells (immortal template DNA and asymmetric division) are evaluated in the light of the niche hypothesis for the stemness state. The induction of cell pluripotency and the different stem cells sources are presented (embryonic, adult and cord blood). We highlight the embryonic and adult stem cell properties and possible therapies while we emphasize the particular scientific and social values of cord blood donation to set up cord blood banks. The current scientific and legal... |
| Tipo: Journal article |
Palavras-chave: Embryonic stem cell; Adult stem cell; Pluripotency; Induced pluripotent stem cells; Umbilical cord blood; Spinal cord stroke; Parkinson' disease. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000300002 |
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| Registros recuperados: 992 | |
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