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| Registros recuperados: 992 | |
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| KUSNIER,CARLOS; CÁRDENAS,CÉSAR; HIDALGO,JORGE; JAIMOVICH,ENRIQUE. |
| Nuclear calcium appears to have an important role in the regulation of gene expression in many cells, but the mechanisms involved in controlling nuclear Ca2+ signaling are controversial and still poorly understood. We have described the presence of inositol 1,4,5 trisphosphate (IP3) receptors in the nuclei of skeletal muscle cells. Now, we have characterized the properties of the IP3 receptors channels present in the nuclei of the 1B5 cell line, which do not express any isoforms of the ryanodine receptor. Immunocytochemistry of isolated nuclei confirmed the presence of IP3R in the nuclear envelope and fluorescence measurements in nuclei suspensions allowed us to document ATP-dependent calcium loading by the nucleus and its release upon IP3 addition. Patch... |
| Tipo: Journal article |
Palavras-chave: Single channel; Cell nucleus; IP3 receptor; Muscle. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000300015 |
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| ZÓCALO,YANINA; BIA,DANIEL; LLUBERAS,SEBASTIÁN; ARMENTANO,RICARDO L. |
| Background: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. Aim: To characterize vein compliance (C), viscosity (η), peak-strain (W St) and dissipated (W D) energy, damping (ξ), and their regional differences in order to evalúate their role in venous functioning during volume-pressure overloads. Methods: In a mock circulation, pressure (P) and diameter (D) of different veins (anterior cava, jugular and femoral; from 7 sheep), were registered during cyclical volume-pressure pulses. From the P-D relationship, C, W St and ξ (at low and high P-D leveis), η and W D... |
| Tipo: Journal article |
Palavras-chave: Compliance; Damping; Energetic; Vascular physiology; Venous wall; Viscosity. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200012 |
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| LE PROVOST,GREGOIRE; HERRERA,RAÚL; PAIVA,JORGE AP; CHAUMEIL,PHILIPPE; SALIN,FRANCK; PLOMION,CHRISTOPHE. |
| A large quantity of high quality RNA is often required in the analysis of gene expression. However, RNA extraction from samples taken from woody plants is generally complex, and represents the main limitation to study gene expression, particularly in refractory species like conifers. Standard RNA extraction protocols are available but they are highly time consuming, and not adapted to large scale extraction. Here we present a high-throughput RNA extraction protocol. This protocol was adapted to a micro-scale by modifying the classical cetyltrimethylammonium (CTAB) protocol developed for pine: (i) quantity of material used (100-200 mg of sample), (ii) disruption of samples in microtube using a mechanical tissue disrupter, and (iii) the use of SSTE buffer.... |
| Tipo: Journal article |
Palavras-chave: RNA extraction; Micromethod; Forest trees. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400003 |
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| Sytar,Oksana; Bruckova,Klaudia; Hunkova,Elena; Zivcak,Marek; Konate,Kiessoun; Brestic,Marian. |
| BACKGROUND: The aim of our research work was to quantify total flavonoid contents in the leaves of 13 plant species family Asteraceae, 8 representatives of family Lamiaceae and 9 plant species belonging to familyRosaceae, using the multiplex fluorimetric sensor. Fluorescence was measured using optical fluorescence apparatus Multiplex(R) 3 (Force-A, France) for non-destructive flavonoids estimation. The content of total flavonoids was estimated by FLAV index (expressed in relative units), that is deduced from flavonoids UV absorbing properties. RESULTS: Among observed plant species, the highest amount of total flavonoids has been found in leaves ofHelianthus multiflorus (1.65 RU) and Echinops ritro (1.27 RU), Rudbeckia fulgida (1.13 RU) belonging to the... |
| Tipo: Journal article |
Palavras-chave: Non-destructive measurement; Flavonoids; Multiplex fluorimetric sensor; Asteraceae; Lamiaceae; Rosaceae. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100005 |
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| COSMELLI,DIEGO; PALACIOS,ADRIAN G. |
| Convergence of clinical, empirical, methodological and theoretical approaches aimed at understanding the relation between brain function and cognition, is by now standard in most if not all academic programs in the area of Cognitive Science. This confederation of disciplines is one of the liveliest domains of inquiry and discussion into some of the most fundamental -and historically resilient- questions human beings have posed themselves. The contributions gathered in this special issue of Biological Research, directly inspired by the ongoing work at the Instituto de Sistemas Complejos de Valparaiso and the December 2006 CONICYT-INSERM-SFI workshop "Networks in Cognitive Systems / Trends and Challenge in Biomedicine: From Cerebral Process to Mathematical... |
| Tipo: Journal article |
Palavras-chave: Cognitive Sciences; Brain Dynamics; Mind-Brain. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500002 |
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| Takahashi,Hiroshi; Ikeda,Kazuhiko; Ogawa,Kazuei; Saito,Syunnichi; Ngoma,Alain M; Mashimo,Yumiko; Ueda,Koki; Furukawa,Miki; Shichishima-Nakamura,Akiko; Ohkawara,Hiroshi; Nollet,Kenneth E; Ohto,Hitoshi; Takeishi,Yasuchika. |
| BACKGROUND: CD4+CD25highFOXP3+ regulatory T (Treg) cells, which include thymus-derived and peripherally induced cells, play a central role in immune regulation, and are therefore crucial to prevent graft-versus-host disease (GVHD). The increasing use of allogeneic hematopoietic stem cell transplantation (allo-HSCT) for elderly patients with thymus regression, and our case of allo-HSCT shortly after total thymectomy, raised questions about the activity of thymus-derived Treg cells and peripherally induced Treg cells, which are otherwise indistinguishable. RESULTS: We found that despite pre-transplant thymectomy or older age, both naïve and effector Treg cells, as well as naïve and effector conventional T cells, proliferated in allo-HSCT recipients. Higher... |
| Tipo: Journal article |
Palavras-chave: Regulatory T cells; Allogeneic hematopoietic stem cell transplantation; Thymus; Graft-versus-host disease. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100041 |
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| Garrido,Osvaldo; Letelier,René; Rosas,Carlos; Fuenzalida,Marcela; Ferreira,Arturo; Lemus,David. |
| Tumor resistance to traditional cancer treatments poses an important challenge to modern science. Thus, angiogenesis inhibition is an important emerging cancer treatment. Many drugs are tested and corticosteroids have shown interesting results. Herein we investigate the effect on microvessel density, survival time and tumoral volume of mice with TA3-MTX-R tumors. Twenty six mice were inoculated with lxlO6 tumor cells, 4-5 days after injection, six mice were injected with PBS (group A) and twenty mice were treated with p-met (group B). All animals from Group A died on day 22. Group B was divided into Bl (treated discontinued) and B2 (treated daily) and observed until day 88. All mice were processed for histo-immunohistochemical analysis and the blood... |
| Tipo: Journal article |
Palavras-chave: Angiogenesis; Betamethasone treatment; Metastasis. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000300008 |
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| Chen,Yuhang; Zhu,Zaibiao; Guo,Qiaosheng; Zhang,Lixia; Zhang,Xiaoming. |
| Prunella vulgaris L. (Labiatae) contains a variety of structurally diverse natural products, primarily rosmarinic acid (RA), ursolic acid (UA) and oleanolic acid (OA), which possess a wide array of biological properties. In the present study, P. vulgaris was harvested at three developmental stages (vegetative, full-flowering and mature-fruiting stages), dissected into stem and leaf tissues and assayed for chemical contents using high performance liquid chromatography. Significant changes in the concentrations of the major secondary metabolites (RA, UA and OA) were observed at the different development stages. The highest concentrations of RA, UA and OA were found at the full-flowering stage (15.83 mg/g dry weight (DW) RA, 1.77 mg/g DW UA and 0.65 mg/g DW... |
| Tipo: Journal article |
Palavras-chave: Prunella vulgaris L.; Ontogenetic and morphogenetic variation; Rosmarinic acid; Ursolic acid; Oleanolic acid. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000200009 |
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| Farias-Junior,Paulo A; Rios,Marcos C; Moura,Tauanny A; Almeida,Roque P; Alves,Pericles B; Blank,Arie F; Fernandes,Roberta P M; Scher,Ricardo. |
| Leishamaniasis is a disease that affects more than 2 million people worldwide, whose causative agent is Leishmania spp. The current therapy for leishmaniasis is far from satisfactory. All available drugs, including pentavalent antimony, require parenteral administration and are potentially toxic. Moreover, an increase in clinical resistance to these drugs has been reported. In this scenario, plant essential oils used traditionally in folk medicine are emerging as alternative sources for chemotherapeutic compounds. In this study, in vitro leishmanicidal effects of a thymol- and a carvacrol-rich essential oil from leaves of Lippia sidoides Cham. were investigated. The essential oils were extracted and their constituents were characterized by gas... |
| Tipo: Journal article |
Palavras-chave: Carvacrol; P-cymene; Essential oil composition; Leishmania chagasi; Lippia ssp.; Thymol; Verbenaceae. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400012 |
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| Ozden,Sevgi; Tiber,Pinar Mega; Ozgen,Zerrin; Ozyurt,Hazan; Serakinci,Nedime; Orun,Oya. |
| BACKGROUND: Telomeres are protective caps consisted of specific tandem repeats (5′-TTAGGG-3′). Shortening of telomeres at each cell division is known as "mitotic clock" of the cells, which renders telomeres as important regulators of lifespan. TRF2 is one of the critical members of shelterin complex, which is a protein complex responsible from the preservation of cap structure, and loss or mutation of TRF2 results in DNA damage, senescence or apoptosis. Since cancer is frequently associated with aberrant cell cycle progression, defective DNA repair or apoptosis pathways, TRF2 could be one likely candidate for cancer therapy. Here we investigated the prognostic role of TRF2 levels in cervical cancer patients. Fold-induction rates were... |
| Tipo: Journal article |
Palavras-chave: Cervical cancer; Radiotherapy; Telomere repeat-binding factors 2; B-cell lymphoma-extra large; Apoptosis. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100055 |
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| Registros recuperados: 992 | |
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