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Castel V, Cañete A, Calabria I, Cervera J, Dolz S, Escobar P, Font de Mora J, Gargallo P, Llavador G, Pedrola L, Yañez Y, Zuñiga A. Letter to the Editor. Clin Transl Oncol 2018; 20:1626-1627. [PMID: 29808413 DOI: 10.1007/s12094-018-1889-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 05/06/2018] [Indexed: 10/14/2022]
Affiliation(s)
- V Castel
- Emeritus Pediatric Oncology University Hospital La Fe, Valencia, Spain.
| | - A Cañete
- Head Pediatric Oncology University Hospital La Fe, Valencia, Spain
| | - I Calabria
- Genomics Platform IIS La Fe, Valencia, Spain
| | - J Cervera
- Head Human Genetics University Hospital La Fe, Valencia, Spain
| | - S Dolz
- Juan Rodes fellow, Pediatric Precision Medicine Program IIS La Fe, Valencia, Spain
| | - P Escobar
- Pharmacy University Hospital La Fe, Valencia, Spain
| | - J Font de Mora
- Head Celular and Molecular Biology lab IIS La Fe, Valencia, Spain
| | - P Gargallo
- Head Pediatric Oncology University Hospital La Fe, Valencia, Spain
| | - G Llavador
- Deprtament of Pathology, University Hospital La Fe, Valencia, Spain
| | - L Pedrola
- Genomics Platform IIS La Fe, Valencia, Spain
| | - Y Yañez
- Clinical Trials Unit Pediatric Oncology University Hospital La Fe, Valencia, Spain
| | - A Zuñiga
- Head Human Genetics University Hospital La Fe, Valencia, Spain
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Rodriguez-Rejon AI, Artacho R, Puerta A, Zuñiga A, Ruiz-Lopez MD. Diagnosis of Sarcopenia in Long-Term Care Homes for the Elderly: the Sensitivity and Specificity of Two Simplified Algorithms with Respect to the EWGSOP Consensus. J Nutr Health Aging 2018; 22:796-801. [PMID: 30080222 DOI: 10.1007/s12603-018-1004-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To analyze the prevalence of sarcopenia in elderly care homes using the algorithm of the European Working Group on Sarcopenia in Older People (EWGSOP) and to evaluate the applicability, sensitivity, and specificity of two simplified algorithms that do not include gait speed measurement. DESIGN Cross-sectional study. SETTING Long-term care homes. PARTICIPANTS 249 residents (187 females and 62 males) with a mean age of 84.9 ± 6.7 years (range, 70-106 yrs). MEASUREMENTS Cognitive impairment was evaluated with the Pfeiffer test, functional capacity with the Barthel index, walking ability by the Functional Ambulation Classification, muscle mass by bioelectrical impedance analysis, muscle strength by handgrip dynamometry and, gait speed over a distance of 4 m. Sarcopenia was assessed using the EWGSOP-recommended algorithm and two simplified algorithms (A and B). Algorithms A and B were validated with respect to the EWGSOP algorithm using the MacNemar test and obtaining the sensitivity and specificity, kappa coefficient, and area under the receiver operating characteristic curve (AUC). RESULTS Total or severe dependence was recorded in 67% of the 249 residents, severe or moderate cognitive impairment in 64%, inability to walk in 49%, and capacity to walk only with the aid of an ambulator or two people in 21%. The prevalence of sarcopenia was 63.0% by the EWGSOP algorithm, 62.9% by algorithm A and 63.2% by algorithm B (P = 1.000); 143 participants were diagnosed with sarcopenia by all three methods (P =1.000, K = 1.000). CONCLUSION Further studies that include residents with functional and/or cognitive impairment are required to validate these results, comparing the diagnostic performance of the EGWSOP algorithm with that of the simplified algorithms validated in the present report.
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Affiliation(s)
- A I Rodriguez-Rejon
- Reyes Artacho Department of Nutrition and Food Sciences. University of Granada, Spain,
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Bolatto C, Parada C, Revello F, Zuñiga A, Cabrera P, Cambiazo V. Spatial and temporal distribution of Patched-related protein in the Drosophila embryo. Gene Expr Patterns 2015; 19:120-8. [PMID: 26506022 DOI: 10.1016/j.gep.2015.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 10/08/2015] [Accepted: 10/21/2015] [Indexed: 12/20/2022]
Abstract
Patched-related (Ptr) encodes a protein with 12 potential transmembrane domains and a sterol-sensing domain that is closely related in predicted topology and domain organization to Patched, the canonical receptor of the Hedgehog pathway. Here we describe the production of an antibody specific for Drosophila Ptr and analyse its spatial and temporal distribution in the embryo. We find that at early developmental stages Ptr is predominantly localized at cell periphery but later on it becomes strongly and almost exclusively expressed in hemocytes. Interestingly Ptr null mutant embryos died without hatching. Our findings suggest that Ptr plays an essential function in Drosophila development, perhaps as a new receptor of embryonic hemocytes.
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Affiliation(s)
- Carmen Bolatto
- Laboratorio de Biología del Desarrollo, Departamento de Histología y Embriología, Facultad de Medicina-Universidad de la República, Montevideo, Uruguay.
| | - Cristina Parada
- Laboratorio de Biología del Desarrollo, Departamento de Histología y Embriología, Facultad de Medicina-Universidad de la República, Montevideo, Uruguay.
| | - Fiorella Revello
- Laboratorio de Biología del Desarrollo, Departamento de Histología y Embriología, Facultad de Medicina-Universidad de la República, Montevideo, Uruguay.
| | - Alejandro Zuñiga
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile and Fondap Center for Genome Regulation (CGR), Santiago, Chile.
| | - Pablo Cabrera
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile and Fondap Center for Genome Regulation (CGR), Santiago, Chile
| | - Verónica Cambiazo
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile and Fondap Center for Genome Regulation (CGR), Santiago, Chile.
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Pulgar R, Travisany D, Zuñiga A, Maass A, Cambiazo V. Complete genome sequence of Piscirickettsia salmonis LF-89 (ATCC VR-1361) a major pathogen of farmed salmonid fish. J Biotechnol 2015. [DOI: 10.1016/j.jbiotec.2015.07.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pulgar R, Hödar C, Travisany D, Zuñiga A, Domínguez C, Maass A, González M, Cambiazo V. Transcriptional response of Atlantic salmon families to Piscirickettsia salmonis infection highlights the relevance of the iron-deprivation defence system. BMC Genomics 2015; 16:495. [PMID: 26141111 PMCID: PMC4490697 DOI: 10.1186/s12864-015-1716-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 06/23/2015] [Indexed: 01/24/2023] Open
Abstract
Background Piscirickettsiosis or Salmonid Rickettsial Septicaemia (SRS) is a bacterial disease that has a major economic impact on the Chilean salmon farming industry. Despite the fact that Piscirickettsia salmonis has been recognized as a major fish pathogen for over 20 years, the molecular strategies underlying the fish response to infection and the bacterial mechanisms of pathogenesis are poorly understood. We analysed and compared the head kidney transcriptional response of Atlantic salmon (Salmo salar) families with different levels of susceptibility to P. salmonis infection in order to reveal mechanisms that might confer infection resistance. Results We ranked forty full-sibling Atlantic salmon families according to accumulated mortality after a challenge with P. salmonis and selected the families with the lowest and highest cumulative mortalities for microarray gene expression analysis. A comparison of the response to P. salmonis infection between low and high susceptibility groups identified biological processes presumably involved in natural resistance to the pathogen. In particular, expression changes of genes linked to cellular iron depletion, as well as low iron content and bacterial load in the head kidney of fish from low susceptibility families, suggest that iron-deprivation is an innate immunity defence mechanism against P. salmonis. To complement these results, we predicted a set of iron acquisition genes from the P. salmonis genome. Identification of putative Fur boxes and expression of the genes under iron-depleted conditions revealed that most of these genes form part of the Fur regulon of P. salmonis. Conclusions This study revealed, for the first time, differences in the transcriptional response to P. salmonis infection among Atlantic salmon families with varied levels of susceptibility to the infection. These differences correlated with changes in the abundance of transcripts encoding proteins directly and indirectly involved in the immune response; changes that highlighted the role of nutritional immunity through iron deprivation in host defence mechanisms against P. salmonis. Additionally, we found that P. salmonis has several mechanisms for iron acquisition, suggesting that this bacterium can obtain iron from different sources, including ferric iron through capturing endogenous and exogenous siderophores and ferrous iron. Our results contribute to determining the underlying resistance mechanisms of Atlantic salmon to P. salmonis infection and to identifying future treatment strategies. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1716-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rodrigo Pulgar
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile.
| | - Christian Hödar
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile. .,Fondap Center for Genome Regulation, Av. Blanco Encalada 2085, Santiago, Chile.
| | - Dante Travisany
- Fondap Center for Genome Regulation, Av. Blanco Encalada 2085, Santiago, Chile. .,Center for Mathematical Modeling and Department of Mathematical Engineering, Av. Beauchef 851, Santiago, Chile.
| | - Alejandro Zuñiga
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile.
| | - Calixto Domínguez
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile.
| | - Alejandro Maass
- Fondap Center for Genome Regulation, Av. Blanco Encalada 2085, Santiago, Chile. .,Center for Mathematical Modeling and Department of Mathematical Engineering, Av. Beauchef 851, Santiago, Chile.
| | - Mauricio González
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile. .,Fondap Center for Genome Regulation, Av. Blanco Encalada 2085, Santiago, Chile.
| | - Verónica Cambiazo
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, El Líbano 5524, Santiago, Chile. .,Fondap Center for Genome Regulation, Av. Blanco Encalada 2085, Santiago, Chile.
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Hodar C, Zuñiga A, Pulgar R, Travisany D, Chacon C, Pino M, Maass A, Cambiazo V. Comparative gene expression analysis of Dtg, a novel target gene of Dpp signaling pathway in the early Drosophila melanogaster embryo. Gene 2013; 535:210-7. [PMID: 24321690 DOI: 10.1016/j.gene.2013.11.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 10/30/2013] [Accepted: 11/14/2013] [Indexed: 10/25/2022]
Abstract
In the early Drosophila melanogaster embryo, Dpp, a secreted molecule that belongs to the TGF-β superfamily of growth factors, activates a set of downstream genes to subdivide the dorsal region into amnioserosa and dorsal epidermis. Here, we examined the expression pattern and transcriptional regulation of Dtg, a new target gene of Dpp signaling pathway that is required for proper amnioserosa differentiation. We showed that the expression of Dtg was controlled by Dpp and characterized a 524-bp enhancer that mediated expression in the dorsal midline, as well as, in the differentiated amnioserosa in transgenic reporter embryos. This enhancer contained a highly conserved region of 48-bp in which bioinformatic predictions and in vitro assays identified three Mad binding motifs. Mutational analysis revealed that these three motifs were necessary for proper expression of a reporter gene in transgenic embryos, suggesting that short and highly conserved genomic sequences may be indicative of functional regulatory regions in D. melanogaster genes. Dtg orthologs were not detected in basal lineages of Dipterans, which unlike D. melanogaster develop two extra-embryonic membranes, amnion and serosa, nevertheless Dtg orthologs were identified in the transcriptome of Musca domestica, in which dorsal ectoderm patterning leads to the formation of a single extra-embryonic membrane. These results suggest that Dtg was recruited as a new component of the network that controls dorsal ectoderm patterning in the lineage leading to higher Cyclorrhaphan flies, such as D. melanogaster and M. domestica.
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Affiliation(s)
- Christian Hodar
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile
| | - Alejandro Zuñiga
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile
| | - Rodrigo Pulgar
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile
| | - Dante Travisany
- Laboratorio de Bioinformática y Matemática del Genoma, Center for Mathematical Modeling, FCFM-Universidad de Chile, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile
| | - Carlos Chacon
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile
| | - Michael Pino
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile
| | - Alejandro Maass
- Laboratorio de Bioinformática y Matemática del Genoma, Center for Mathematical Modeling, FCFM-Universidad de Chile, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile; Department of Mathematical Engineering, FCFM-Universidad de Chile, Santiago, Chile
| | - Verónica Cambiazo
- Laboratorio de Bioinformática y Expresión Génica, INTA-Universidad de Chile, El Líbano 5524, Santiago, Chile; Fondap Center for Genome Regulation (CGR), Universidad de Chile, Santiago, Chile.
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Bellolio F, Donoso A, Molina ME, Miguieles R, Zuñiga A. Mortality trends from colorectal cancer in Chile. Colorectal Dis 2013; 15:761-2. [PMID: 23692079 DOI: 10.1111/codi.12196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 01/08/2013] [Indexed: 02/08/2023]
Affiliation(s)
- F. Bellolio
- Department of Digestive Surgery; Faculty of Medicine; Pontificia Universidad Catolica de Chile; Santiago; Chile
| | - A. Donoso
- Department of Digestive Surgery; Faculty of Medicine; Pontificia Universidad Catolica de Chile; Santiago; Chile
| | - M. E. Molina
- Department of Digestive Surgery; Faculty of Medicine; Pontificia Universidad Catolica de Chile; Santiago; Chile
| | - R. Miguieles
- Department of Digestive Surgery; Faculty of Medicine; Pontificia Universidad Catolica de Chile; Santiago; Chile
| | - A. Zuñiga
- Department of Digestive Surgery; Faculty of Medicine; Pontificia Universidad Catolica de Chile; Santiago; Chile
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Mellado M, Zuñiga A, Veliz F, de Santiago A, Garcia J, Mellado J. Factors influencing pregnancy per artificial insemination in repeat-breeder cows induced to ovulate with a CIDR-based protocol. Anim Reprod Sci 2012; 134:105-11. [DOI: 10.1016/j.anireprosci.2012.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 07/03/2012] [Accepted: 08/05/2012] [Indexed: 10/28/2022]
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Rodríguez-Llamazares S, Zuñiga A, Castaño J, Radovic LR. Comparative study of maleated polypropylene as a coupling agent for recycled low-density polyethylene/wood flour composites. J Appl Polym Sci 2011. [DOI: 10.1002/app.34104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bucarey SA, Noriega J, Reyes P, Tapia C, Sáenz L, Zuñiga A, Tobar JA. The optimized capsid gene of porcine circovirus type 2 expressed in yeast forms virus-like particles and elicits antibody responses in mice fed with recombinant yeast extracts. Vaccine 2009; 27:5781-90. [PMID: 19664739 DOI: 10.1016/j.vaccine.2009.07.061] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 06/21/2009] [Accepted: 07/19/2009] [Indexed: 10/20/2022]
Abstract
Porcine circovirus type 2 (PCV2)-associated diseases are considered to be the biggest problem for the worldwide swine industry. The PCV2 capsid protein (Cap) is an important antigen for development of vaccines. At present, most anti-PCV2 vaccines are produced as injectable formulations. Although effective, these vaccines have certain drawbacks, including stress with concomitant immunosuppresion, and involve laborious and time-consuming procedures. In this study, Saccharomyces cerevisiae was used as a vehicle to deliver PCV2 antigen in a preliminary attempt to develop an oral vaccine, and its immunogenic potential in mice was tested after oral gavage-mediated delivery. The cap gene with a yeast-optimized codon usage sequence (opt-cap) was chemically synthesized and cloned into Escherichia coli/Saccharomyces cerevisiae shuttle vector, pYES2, under the control of the Gal1 promoter. Intracellular expression of the Cap protein was confirmed by Western blot analysis and its antigenic properties were compared with those of baculovirus/insect cell-produced Cap protein derived from the native PCV2 cap gene. It was further demonstrated by electron micrography that the yeast-derived PCV2 Cap protein self-assembles into virus-like particles (VLPs) that are morphologically and antigenically similar to insect cell-derived VLPs. Feeding raw yeast extract containing Cap protein to mice elicited both serum- and fecal-specific antibodies against the antigen. These results show that it is feasible to use S. cerevisiae as a safe and simple system to produce PCV2 virus-like particles, and that oral yeast-mediated antigen delivery is an alternative strategy to efficiently induce anti-PCV2 antibodies in a mouse model, which is worthy of further investigation in swine.
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Affiliation(s)
- Sergio A Bucarey
- Centro Biotecnológico Veterinario Biovetec, Departamento de Ciencias Biológicas Animales, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Chile.
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Aracena J, González M, Zuñiga A, Mendez MA, Cambiazo V. Regulatory network for cell shape changes during Drosophila ventral furrow formation. J Theor Biol 2006; 239:49-62. [PMID: 16139845 DOI: 10.1016/j.jtbi.2005.07.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2004] [Revised: 07/15/2005] [Accepted: 07/18/2005] [Indexed: 01/04/2023]
Abstract
Rapid and sequential cell shape changes take place during the formation of the ventral furrow (VF) at the beginning of Drosophila gastrulation. At the cellular level, this morphogenetic event demands close coordination of the proteins involved in actin cytoskeletal reorganization. In order to construct a regulatory network that describes these cell shape changes, we have used published genetic and molecular data for 18 genes encoding transcriptional regulators and signaling pathway components. Based on the dynamic behavior of this network we explored the hypothesis that the combination of three recognizable phenotypes describing wild type or mutant cell types, during VF invagination, correspond to different activation states of a specific set of these gene products, which are point attractors of the regulatory network. From our results, we recognize missing components in the regulatory network and suggest alternative pathways in the regulation of cell shape changes during VF formation.
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Affiliation(s)
- Julio Aracena
- Centro de Modelamiento Matemático, UMR-CNRS 2071, Universidad de Chile, Casilla 170-3, Santiago, Chile
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Bernet L, Zuñiga A, Cano R. Characterization of GIST/GIPACT tumors by inmunohistochemistry and exon 11 analysis of c-kit by PCR. Rev Esp Enferm Dig 2003; 95:688-91, 683-7. [PMID: 14588063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Gastrointestinal stromal tumors (GIST/GIPACT) are the most common mesenchymal tumors of the human gastrointestinal (GI) tract and are characterized by the constant immunohistochemical expression of CD117. In recent years, sporadic and germ line mutations in the c-kit gene have been described in GIST/GIPACT tumors, resulting in a constitutive activation of the gene. The most prevalent mutation is located in exon 11 of the c-kit gene, involved in the transcription of the juxta-membrane domain of the c-kit protein. There are conflicting reports with respect to the association between exon 11 mutations and the biological behavior of GIST/GIPACT tumors. This work studies eight patients with tumors diagnosed as GIST/GIPACT, both morphologically and immunohistochemically for CD117, CD34, a-smooth muscle actin, desmin and S-100 protein primary antibodies. The DNA of the eight cases was also studied by PCR for mutation of exon 11 of the c-kit gene. All cases were CD117 positive, but only two showed mutation of exon 11. These last two cases did not show morphological characteristics of malignancy. The most aggressive case, with early death of the patient, did not show the mutation. In conclusion, there was no correlation between the mutation of exon 11 of the c-kit gene and the malignant behavior of GIST/GIPACT tumors in our series.
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Affiliation(s)
- L Bernet
- Servicios de Patología. Hospital de la Ribera. Alzira, Valencia. Spain.
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Iunes P, Bigazzi G, Hadler N J, Tello S C, Guedes O S, Paulo S, Balestrieri M, Norelli P, Oddone M, Osorio A A, Zuñiga A. The Th/U ratio in minerals by a fission-track technique: application to some reference samples in order to estimate the influence of Th in fission-track dating. RADIAT MEAS 2002. [DOI: 10.1016/s1350-4487(01)00293-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Backhouse CN, Delporte CL, Negrete RE, Erazo S, Zuñiga A, Pinto A, Cassels BK. Active constituents isolated from Psoralea glandulosa L. with antiinflammatory and antipyretic activities. J Ethnopharmacol 2001; 78:27-31. [PMID: 11585684 DOI: 10.1016/s0378-8741(01)00309-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The antiinflammatory and antipyretic activities of the petroleum ether extract (PEE), dichloromethane extract (DME) and methanol extract (ME1) of the aerial part of Psoralea glandulosa L. (Papilionaceae) were studied. The bioactivity-guided fractionation of the active extracts yielded the isolation of bakuchiol (Bk) from the petroleum ether as the active compound, cyclobakuchiols A and B (Cbk), and angelicin (Ang) from DME.
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Affiliation(s)
- C N Backhouse
- Laboratory of Pharmacognosy, Faculty of Pharmaceutical and Chemical Sciences, University of Chile, PO Box 233, 1-, Santiago, Chile
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Goecke A, Kusanovic JP, Serrano M, Charlin T, Zuñiga A, Marusic ET. Increased Na,K,Cl cotransporter and Na, K-ATPase activity of vascular tissue in two-kidney Goldblatt hypertension. Biol Res 1998; 31:263-71. [PMID: 9830514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
The properties of the Na/K pump and Na,K,Cl cotransporter were studied in vascular tissue of two-kidney Goldblatt hypertensive rats. These transport systems were measured as ouabain-sensitive and bumetanide-sensitive 86Rb/K uptake in aortic rings, left ventricular muscle and soleus skeletal muscle fibers of control and hypertensive Sprague-Dawley rats. A dramatic increment in Na/K pump activity was observed in intact aortic rings from the hypertensive group. The same was true for the Na,K,Cl cotransporter. The transport parameters related to the left ventricular muscle and soleus skeletal muscle were not significantly altered in the hypertensive rats. Measurements of the catalytic isoforms of the Na+, K(+)-ATPase in the aortic rings indicated that both isoforms (alpha 1 and alpha 2) were elevated in the same proportion in the hypertensive rats. The results also indicate that the endothelium plays an important role in both transport systems: in the absence of endothelium, a much lower 86Rb/K uptake was observed than in intact aortic rings, either from control or hypertensive vascular tissue. Nevertheless, when the 86Rb/K transport activity was measured in denuded aortic rings, a significantly higher ouabain and bumetanide sensitive 86Rb/K uptake was also observed in the hypertensive rats. These data also show no alteration in the endothelium of the hypertensive rats as compared to control animals. The presence of endothelium had a more striking effect on the alpha 2 catalytic isoform activity than on the alpha 1 isoform. We conclude that there is a significant increment in the Na/K pump and Na,K,Cl cotransporter in two kidney-Goldblatt hypertension, that is specific for vascular smooth muscle.
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Affiliation(s)
- A Goecke
- Department of Physiology & Biophysics, Faculty of Medicine, University of Chile, Santiago, Chile.
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Hernández G, López F, Castillo L, Bugedo G, Leiva G, Ruíz F, Añazco R, Zuñiga A. Postoperative ischemia after gut transplantation: role of different monitoring systems. Transplant Proc 1996; 28:2631-2. [PMID: 8907986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- G Hernández
- Catholic University School of Medicine, Santiago, Chile
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Grau A, Quintana C, Zuñiga A. [Crohn's disease: clinical presentation and results of surgical treatment]. Rev Med Chil 1993; 121:162-6. [PMID: 8303112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Surgery has an important role in the treatment of Crohn's disease (CD). The objective of this communication is to assess the results of surgical treatment in CD, trying to identify recurrence risk factors. A retrospective review of the charts of 120 patients with CD seen between 1963 and 1990 was made. One third of these patients required surgical treatment. The series was divided in two groups. Group A comprised patients treated from 1963 to 1977. Of these, 30% had ileal localization of the disease and 20 patients were submitted to 20 surgical procedures. The major surgical indication was intestinal obstruction and resection was performed in 85% of patients. Morbidity was 20% and mortality 10%. Group B comprised patients treated from 1978 to 1990. Nineteen patients were submitted to 22 surgical procedures. The disease was localized in the ileon in 50% of these patients. Twenty one surgical procedures were resective with a 9% complication rate and no surgical mortality. Eighty percent of patients in this group has a complete follow up. In 47% the disease recurred 37 months (as a mean) after surgery. No effect of age, sex or localization of the disease on the risk of recurrence was observed. It is concluded that morbidity and mortality of surgical treatment for Crohn's disease has decreased and a prolonged control of symptoms has been achieved. No recurrence risk factors were identified in this study.
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Affiliation(s)
- A Grau
- Departamento de Gastroenterología, Escuela de Medicina, Universidad Católica de Chile, Santiago de Chile
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Zuñiga A, Rahmer A, Llanos O, Guzmán S, Quintana C, Pimentel F. [Ulcerative colitis: indications and results of surgical treatment]. Rev Med Chil 1987; 115:1155-60. [PMID: 3504572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Zuñiga A, Llanos O, Guzmán S, Cruz F, Rahmer A. [Massive lower digestive hemorrhage. Experience with 26 patients]. Rev Med Chil 1986; 114:636-42. [PMID: 3496645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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22
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Jacobelli S, Sepúlveda C, Quintana C, Zuñiga A. [Articular manifestations of ulcerative colitis: experience with 88 patients]. Rev Med Chil 1984; 112:797-801. [PMID: 6533719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Raddatz A, Zuñiga A, Duarte I. [Endoscopic polypectomy of the colon: experience with 26 patients]. Rev Med Chil 1983; 111:584-7. [PMID: 6608125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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24
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Zuñiga A, San Martín S, Morales C, Ordóñez ME. [Colorectal cancer: results of surgical treatment of 88 patients]. Rev Med Chil 1982; 110:751-5. [PMID: 7156608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Zuñiga A, Quintana C, Croxatto H, Díaz F. [Surgical treatment of Crohn's disease (author's transl)]. Rev Med Chil 1980; 108:507-11. [PMID: 7466003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Zuñiga A, Quintana C, Duarte I, Videla D. [Toxic megacolon (author's transl)]. Rev Med Chil 1980; 108:537-41. [PMID: 7466005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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27
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Zuñiga A. [Total proctocolectomy for severe ulcerative colitis (author's transl)]. Rev Med Chil 1976; 104:807-11. [PMID: 1021842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zuñiga A, Quintana C, Montero E. [Proctocolitis: experience in 95 patients (author's transl)]. Rev Med Chil 1975; 103:601-8. [PMID: 1209046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Rosado A, Gallegos Vargas G, Bernal A, Velazquez A, Zuñiga A. [Application of clinical biochemistry to the diagnosis of cancer]. Prensa Med Mex 1970; 35:130-8. [PMID: 5282601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Zuñiga A. [Pre-anesthetic medication in pediatrics. Comparative clinical study of Ro-4-5360, pentobarbital and a placebo with the double blind method and sequential analysis]. Rev Chil Pediatr 1965; 36:420-5. [PMID: 5323879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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