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| Registros recuperados: 992 | |
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| FADIC,RICARDO. |
| Duchenne muscular dystrophy (DMD) is secondary to loss-of-function mutations in the dystrophin gene. The causes underlying the progression of DMD, differential muscle involvement, and the discrepancies in phenotypes among species with the same genetic defect are not understood. The mdx mouse, an animal model with dystrophin mutation, has a milder phenotype. This article reviews the available information on expression of signaling-related molecules in DMD and mdx. Extracellular matrix proteoglycans, growth factors, integrins, caveolin-3, and neuronal nitric oxide synthase expression do not show significant differences. Calcineurin is inconsistently activated in mdx, which is associated with lack of cardiomyopathy, compared to the permanent calcineurin... |
| Tipo: Journal article |
Palavras-chave: Dystrophinopathy; Signaling molecules; Duchenne muscular dystrophy. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000400010 |
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| Maya,Juan Diego; Orellana,Myriam; Ferreira,Jorge; Kemmerling,Ulrike; López-Muñoz,Rodrigo; Morello,Antonio. |
| There are approximately 7.8 million people in Latin America, including Chile, who suffer from Chagas disease and another 28 million who are at risk of contracting it. Chagas is caused by the flagellate protozoan Trypanosoma cruzi. It is a chronic disease, where 20%-30% of infected individuals develop severe cardiopathy, with heart failure and potentially fatal arrhythmias. Currently, Chagas disease treatment is more effective in the acute phase, but does not always produce complete parasite eradication during indeterminate and chronic phases. At present, only nifurtimox or benznidazole have been proven to be superior to new drugs being tested. Therefore, it is necessary to find alternative approaches to treatment of chronic Chagas. The current treatment... |
| Tipo: Journal article |
Palavras-chave: Chagas disease; Chemotherapy; Nifurtimox; Trypanosoma cruzi; Prostaglandins. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000300009 |
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| LEITAO,LOUIS; MAORET,JEAN-JOSÉ; BIOLLEY,JEAN-PHILIPPE. |
| We quantified the ozone impact on levels of Zea mays L. cv. Chambord mRNAs encoding C4-phosphoenolpyruvate carboxylase (C4-PEPc), ribulose-l,5-bisphosphate carboxylase/oxygenase small and large subunits (Rubisco-SSU and Rubisco-LSU, respectively) and Rubisco activase (RCA) using real-time RT-PCR. Foliar pigment content, PEPc and Rubisco protein amounts were simultaneously determined. Two experiments were performed to study the ozone response of the 5th and the 10th leaf. For each experiment, three ozone concentrations were tested in open-top chambers: non-filtered air (NF, control) and non-filtered air containing 40 (+40) and 80 nL L-1 (+80) ozone. Regarding the 5th leaf, +40 atmosphere induced a loss in pigmentation, PEPc and Rubisco activase mRNAs.... |
| Tipo: Journal article |
Palavras-chave: Carboxylase; Maize; MRNA; Ozone; Rubisco activase. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200005 |
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| CHENG,SHU-QUN; HE,JUN-LIN; DONG,YAN-LING; LIU,XUE-QING; DING,YU-BIN; GAO,RU-FEI; TAN,YI; YE,QIAN; TIAN,ZHEN-LING; WANG,YING-XIONG. |
| Calreticulin (CRT), a Ca2+-binding storage protein and chaperone in the endoplasmic reticulum, modulates cell adhesiveness and integrin-dependent Ca2+ signaling. However, the role of CRT during implantation remains poorly understood. In the present study, we characterized the expression of CRT mRNA and the protein in mouse endometria from pregnancy DI to D7. Real-Time PCR and in situ hybridization results showed that the levels of CRT mRNA in the endometria of pregnant mice were significantly higher than those of non-pregnant mice (P<0.05), and increased gradually from pregnancy DI to D4, reaching the máximum level on D4, followed by a plateau from D4 to D7. Using immunofluorescence histochemistry and western blot, changes of CRT expression in the... |
| Tipo: Journal article |
Palavras-chave: Calreticulin; Endometrium; Embryo implantation; Mouse. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400012 |
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| MAZARIEGOS,DORA INÉS; CABANTCHIK,Z. IOAV; CASSELS,BRUCE K; NÚÑEZ,MARCO TULIO. |
| There is increasing evidence that accumulation of redox-active iron in mitochondria leads to oxidative damage and contributes to various neurodegenerative diseases, such as Friedreich's ataxia and Parkinson's disease. In this work, we examined the existence of regulatory mechanisms for mitochondrial iron uptake and storage. To that end, we used rhodamine B- [(1,10-phenanthrolin-5-yl)amino carbonyl ] benzyl ester, a new fluorescent iron-sensitive probe that is targeted specifically to the mitochondrion. We found that extracellular iron was incorporated readily into mitochondria in an apparently saturable process. Moreover, the rate of iron incorporation responded to the Fe status of the cell, an indication that the mitochondrion actively regulates its iron... |
| Tipo: Journal article |
Palavras-chave: Mitochondria; Iron homeostasis; RPA; HepG2 cells. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000100024 |
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| VERA,JORGE; VALENZUELA,BEATRIZ; ROTH,MÓNICA J; LEÓN,ÓSCAR. |
| Processing of viral DNA by retroviral integrase leaves a dinucleotide single-strand overhang in the unprocessed strand. Previous studies have stressed the importance of the 5' single-stranded (ss) tail in the integration process. To characterize the ss-tail binding site on M-MuLV integrase, we carried out crosslinking studies utilizing a disintegration substrate that mimics the covalent intermediate formed during integration. This substrate carried reactive groups at the 5' ss tail. A bromoacetyl derivative with a side chain of 6 A was crosslinked to the mutant IN 106-404, which lacks the N-terminal domain, yielding a crosslinked complex of 50 kDa. Treatment of IN 106-404 with N-ethylmaleimide (NEM) prevented crosslinking, suggesting that Cys209 was... |
| Tipo: Journal article |
Palavras-chave: Integrase; Retrovirus; Crosslinking. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000100009 |
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| Sebei,Khaled; Sakouhi,Fawzi; Herchi,Wahid; Khouja,Mohamed Larbi; Boukhchina,Sadok. |
| BACKGROUND: In this paper, we have studied the essential oils chemical composition of the leaves of seven Eucalyptus species developed in Tunisia. Eucalyptus leaves were picked from trees growing in different arboretums in Tunisia. Choucha and Mrifeg arboretums located in Sedjnene, region of Bizerte (Choucha: E. maideni, E. astrengens et E. cinerea; Mrifeg : E. leucoxylon), Korbous arboretums located in the region of Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum located in region of Jendouba (E. sideroxylon, E. bicostata). Essential oils were individually tested against a large panel of microorganisms includingStaphylococcus aureus (ATCC 6539), Escherichia coli (ATCC 25922), Enterococcus faecalis... |
| Tipo: Journal article |
Palavras-chave: Eucalyptus; Essential oil; Antibacterial activity; -pinene. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100007 |
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| Muzaffar,Adnan; Kiani,Sarfraz; Khan,Muhammad Azmat Ullah; Rao,Abdul Qayyum; Ali,Arfan; Awan,Mudassar Fareed; Iqbal,Adnan; Nasir,Idrees Ahmad; Shahid,Ahmad Ali; Husnain,Tayyab. |
| BACKGROUND: Insects have developed resistance against Bt-transgenic plants. A multi-barrier defense system to weaken their resistance development is now necessary. One such approach is to use fusion protein genes to increase resistance in plants by introducing more Bt genes in combination. The locating the target protein at the point of insect attack will be more effective. It will not mean that the non-green parts of the plants are free of toxic proteins, but it will inflict more damage on the insects because they are at maximum activity in the green parts of plants. RESULTS: Successful cloning was achieved by the amplification of Cry2A, Cry1Ac, and a transit peptide. The appropriate polymerase chain reaction amplification and digested products confirmed... |
| Tipo: Journal article |
Palavras-chave: Chloroplast transient peptide; Cry1Ac; Cry2A; Bt; CTP; Cry genes; Endotoxins; GUS; Transgenic plants. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100014 |
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| ROMAGUERA,FERNANDA; MATTIOLI,ROSANA. |
| This work investigated the effect of the Hj receptor blockade in the forebrain of ablated Carassius auratus in a simple stimulus-response learning task using a T-maze test with positive reinforcement. The goldfish were submitted to surgery for removal of both telencephalic lobes five days before beginning the experiment. A T-shaped glass aquarium was employed, with two feeders located at the extremities of the long arm. One of the two feeders was blocked. The experimental triáis were performed in nine consecutive days. Each fish was individually placed in the short arm and confined there for thirty seconds, then it was allowed to swim through the aquarium to search for food for ten minutes (máximum period). Time to find food was analysed in seconds.... |
| Tipo: Journal article |
Palavras-chave: Histamine; Learning; Teleost fish; Telencephalon. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000300010 |
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| Registros recuperados: 992 | |
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