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Del Real A, Sañudo C, García-Ibarbia C, Santurtún A, Zarrabeitia MT, Pérez-Núñez MI, Laguna E, López-Delgado L, Fernández AF, Fraga MF, Riancho JA. Impacto funcional de polimorfismos del gen de la esclerostina sobre la metilación de ADN y la expresión génica. Rev Osteoporos Metab Miner 2019. [DOI: 10.4321/s1889-836x2019000400004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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2
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Martínez-Morillo E, García-García M, Barneo-Caragol C, Fernández Fernández A, Álvarez FV. Pancytopenia and Peripheral Neuropathy in a Woman with Altered Liver Function Tests. Clin Chem 2019; 65:956-960. [PMID: 31358500 DOI: 10.1373/clinchem.2018.298927] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/24/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Eduardo Martínez-Morillo
- Department of Biochemistry and Laboratory Medicine, Hospital Universitario Central de Asturias, Oviedo, Spain;
| | - María García-García
- Department of Biochemistry and Laboratory Medicine, Hospital Universitario Central de Asturias, Oviedo, Spain
| | - Clara Barneo-Caragol
- Department of Biochemistry and Laboratory Medicine, Hospital Universitario Central de Asturias, Oviedo, Spain
| | | | - Francisco V Álvarez
- Department of Biochemistry and Laboratory Medicine, Hospital Universitario Central de Asturias, Oviedo, Spain.,Department of Biochemistry and Molecular Biology, University of Oviedo, Oviedo, Spain
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3
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Sierra MI, Valdés A, Fernández AF, Torrecillas R, Fraga MF. The effect of exposure to nanoparticles and nanomaterials on the mammalian epigenome. Int J Nanomedicine 2016; 11:6297-6306. [PMID: 27932878 PMCID: PMC5135284 DOI: 10.2147/ijn.s120104] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Human exposure to nanomaterials and nanoparticles is increasing rapidly, but their effects on human health are still largely unknown. Epigenetic modifications are attracting ever more interest as possible underlying molecular mechanisms of gene–environment interactions, highlighting them as potential molecular targets following exposure to nanomaterials and nanoparticles. Interestingly, recent research has identified changes in DNA methylation, histone post-translational modifications, and noncoding RNAs in mammalian cells exposed to nanomaterials and nanoparticles. However, the challenge for the future will be to determine the molecular pathways driving these epigenetic alterations, the possible functional consequences, and the potential effects on health.
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Affiliation(s)
- M I Sierra
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA), Universidad de Oviedo, Oviedo
| | - A Valdés
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, El Entrego, Spain
| | - A F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA), Universidad de Oviedo, Oviedo
| | - R Torrecillas
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, El Entrego, Spain
| | - M F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, El Entrego, Spain
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4
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Perez-Janices N, Blanco-Luquin I, Tuñón MT, Barba-Ramos E, Ibáñez B, Zazpe-Cenoz I, Martinez-Aguillo M, Hernandez B, Martínez-Lopez E, Fernández AF, Mercado MR, Cabada T, Escors D, Megias D, Guerrero-Setas D. EPB41L3, TSP-1 and RASSF2 as new clinically relevant prognostic biomarkers in diffuse gliomas. Oncotarget 2016; 6:368-80. [PMID: 25621889 PMCID: PMC4381601 DOI: 10.18632/oncotarget.2745] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 08/05/2014] [Accepted: 11/12/2014] [Indexed: 12/17/2022] Open
Abstract
Hypermethylation of tumor suppressor genes is one of the hallmarks in the progression of brain tumors. Our objectives were to analyze the presence of the hypermethylation of EPB41L3, RASSF2 and TSP-1 genes in 132 diffuse gliomas (astrocytic and oligodendroglial tumors) and in 10 cases of normal brain, and to establish their association with the patients’ clinicopathological characteristics. Gene hypermethylation was analyzed by methylation-specific-PCR and confirmed by pyrosequencing (for EPB41L3 and TSP-1) and bisulfite-sequencing (for RASSF2). EPB41L3, RASSF2 and TSP-1 genes were hypermethylated only in tumors (29%, 10.6%, and 50%, respectively), confirming their cancer-specific role. Treatment of cells with the DNA-demethylating-agent 5-aza-2′-deoxycytidine restores their transcription, as confirmed by quantitative-reverse-transcription-PCR and immunofluorescence. Immunohistochemistry for EPB41L3, RASSF2 and TSP-1 was performed to analyze protein expression; p53, ki-67, and CD31 expression and 1p/19q co-deletion were considered to better characterize the tumors. EPB41L3 and TSP-1 hypermethylation was associated with worse (p = 0.047) and better (p = 0.037) prognosis, respectively. This observation was confirmed after adjusting the results for age and tumor grade, the role of TSP-1 being most pronounced in oligodendrogliomas (p = 0.001). We conclude that EPB41L3, RASSF2 and TSP-1 genes are involved in the pathogenesis of diffuse gliomas, and that EPB41L3 and TSP-1 hypermethylation are of prognostic significance.
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Affiliation(s)
- N Perez-Janices
- Cancer Epigenetics Group, Navarrabiomed-Fundación Miguel Servet, Navarra, Spain
| | - I Blanco-Luquin
- Cancer Epigenetics Group, Navarrabiomed-Fundación Miguel Servet, Navarra, Spain
| | - M T Tuñón
- Department of Pathology Section A, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - E Barba-Ramos
- Department of Pathology Section A, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - B Ibáñez
- Navarrabiomed-Fundación Miguel Servet, Navarra, Spain. Red de Evaluación en Servicios Sanitarios y Enfermedades Crónicas (REDISSEC), Navarra, Spain
| | - I Zazpe-Cenoz
- Department of Neurosurgery, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - M Martinez-Aguillo
- Department of Medical Oncology, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - B Hernandez
- Department of Medical Oncology, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - E Martínez-Lopez
- Department of Radiation Oncology, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - A F Fernández
- Cancer Epigenetics Laboratory, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), HUCA, Universidad de Oviedo, Asturias, Spain
| | - M R Mercado
- Department of Pathology Section A, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - T Cabada
- Department of Radiology, Complejo Hospitalario de Navarra, Navarra Health Service, Navarra, Spain
| | - D Escors
- Navarrabiomed-Fundación Miguel Servet, Navarra, Spain
| | - D Megias
- Confocal Microscopy Core Unit, Spanish National Cancer Research Centre, Madrid, Spain
| | - D Guerrero-Setas
- Cancer Epigenetics Group, Navarrabiomed-Fundación Miguel Servet, Navarra, Spain
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5
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Sandoval-Hernández AG, Hernández HG, Restrepo A, Muñoz JI, Bayon GF, Fernández AF, Fraga MF, Cardona-Gómez GP, Arboleda H, Arboleda GH. Liver X Receptor Agonist Modifies the DNA Methylation Profile of Synapse and Neurogenesis-Related Genes in the Triple Transgenic Mouse Model of Alzheimer's Disease. J Mol Neurosci 2015; 58:243-53. [PMID: 26553261 DOI: 10.1007/s12031-015-0665-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 10/08/2015] [Indexed: 12/22/2022]
Abstract
The liver X receptor agonist, GW3965, improves cognition in Alzheimer's disease (AD) mouse models. Here, we determined if short-term GW3965 treatment induces changes in the DNA methylation state of the hippocampus, which are associated with cognitive improvement. Twenty-four-month-old triple-transgenic AD (3xTg-AD) mice were treated with GW3965 (50 mg/kg/day for 6 days). DNA methylation state was examined by modified bisulfite conversion and hybridization on Illumina Infinium Methylation BeadChip 450 k arrays. The Morris water maze was used for behavioral analysis. Our results show in addition to improvement in cognition methylation changes in 39 of 13,715 interrogated probes in treated 3xTg-AD mice compared with untreated 3xTg-AD mice. These changes in methylation probes include 29 gene loci. Importantly, changes in methylation status were mainly from synapse-related genes (SYP, SYN1, and DLG3) and neurogenesis-associated genes (HMGB3 and RBBP7). Thus, our results indicate that liver X receptors (LXR) agonist treatment induces rapid changes in DNA methylation, particularly in loci associated with genes involved in neurogenesis and synaptic function. Our results suggest a new potential mechanism to explain the beneficial effect of GW3965.
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Affiliation(s)
- A G Sandoval-Hernández
- Grupo de Muerte Celular, Instituto de Genética, Universidad Nacional de Colombia, Bogotá, Colombia
| | - H G Hernández
- Grupo de Neurociencias, Universidad Nacional, Bogotá, Colombia
| | - A Restrepo
- Grupo de Muerte Celular, Instituto de Genética, Universidad Nacional de Colombia, Bogotá, Colombia
| | - J I Muñoz
- Área de Neurobiología Celular y Molecular, Grupo de Neurociencias de Antioquia, Universidad de Antioquia, Medellín, Colombia
| | - G F Bayon
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA), Universidad de Oviedo, Oviedo, Spain
| | - A F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA), Universidad de Oviedo, Oviedo, Spain
| | - M F Fraga
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA), Universidad de Oviedo, Oviedo, Spain
| | - G P Cardona-Gómez
- Área de Neurobiología Celular y Molecular, Grupo de Neurociencias de Antioquia, Universidad de Antioquia, Medellín, Colombia
| | - H Arboleda
- Grupo de Neurociencias, Universidad Nacional, Bogotá, Colombia
| | - Gonzalo H Arboleda
- Grupo de Muerte Celular, Instituto de Genética, Universidad Nacional de Colombia, Bogotá, Colombia.
- Departamento de Patología, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia.
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6
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Roncero AM, López-Nieva P, Cobos-Fernández MA, Villa-Morales M, González-Sánchez L, López-Lorenzo JL, Llamas P, Ayuso C, Rodríguez-Pinilla SM, Arriba MC, Piris MA, Fernández-Navarro P, Fernández AF, Fraga MF, Santos J, Fernández-Piqueras J. Contribution of JAK2 mutations to T-cell lymphoblastic lymphoma development. Leukemia 2015. [PMID: 26216197 PMCID: PMC4705429 DOI: 10.1038/leu.2015.202] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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] [Indexed: 12/20/2022]
Abstract
The JAK-STAT pathway has a substantial role in lymphoid precursor cell proliferation, survival and differentiation. Nonetheless, the contribution of JAK2 to T-cell lymphoblastic lymphoma (T-LBL) development remains poorly understood. We have identified one activating TEL-JAK2 translocation and four missense mutations accumulated in 2 out of 16 T-LBL samples. Two of them are novel JAK2 mutations and the other two are reported for the first time in T-LBL. Notably, R683G and I682T might have arisen owing to RNA editing. Mutated samples showed different mutated transcripts suggesting sub-clonal heterogeneity. Functional approaches revealed that two JAK2 mutations (H574R and R683G) constitutively activate JAK-STAT signaling in γ2A cells and can drive the proliferation of BaF3-EpoR cytokine-dependent cell line. In addition, aberrant hypermethylation of SOCS3 might contribute to enhance the activation of JAK-STAT signaling. Of utmost interest is that primary T-LBL samples harboring JAK2 mutations exhibited increased expression of LMO2, suggesting a mechanistic link between JAK2 mutations and the expression of LMO2, which was confirmed for the four missense mutations in transfected γ2A cells. We therefore propose that active JAK2 contribute to T-LBL development by two different mechanisms, and that the use of pan-JAK inhibitors in combination with epigenetic drugs should be considered in future treatments.
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Affiliation(s)
- A M Roncero
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - P López-Nieva
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - M A Cobos-Fernández
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
| | - M Villa-Morales
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
| | - L González-Sánchez
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
| | | | - P Llamas
- IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - C Ayuso
- IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
| | | | - M C Arriba
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - M A Piris
- Hospital Universitario Marqués de Valdecilla, Fundación IFIMAV, Santander, Spain
| | - P Fernández-Navarro
- Unidad de Epidemiología Ambiental y Cáncer, Centro Nacional de Epidemiología, Instituto de Salud Carlos III, Madrid, Spain.,Consorcio de Investigación Biomédica de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.,IIS Puerta de Hierro, Majadahonda, Spain
| | - A F Fernández
- Unidad de Epigenética del Cáncer, Instituto Universitario de Oncología del Principado de Asturias (IUOPA-CSIC), Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - M F Fraga
- Unidad de Epigenética del Cáncer, Instituto Universitario de Oncología del Principado de Asturias (IUOPA-CSIC), Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain.,Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología (CNB), Madrid, Spain
| | - J Santos
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
| | - J Fernández-Piqueras
- Centro de Biología Molecular Severo Ochoa (CBMSO), Consejo Superior de Investigaciones Científicas- Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,IIS-Fundación Jiménez Díaz, Madrid, Spain.,Centro de Investigaciones Biomédicas en Red de Enfermedades Raras (CIBERER), Valencia, Spain
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Sempere JM, Martinez-Peinado P, Arribas MI, Reig JA, De La Sen ML, Zubcoff JJ, Fraga MF, Fernández AF, Santana A, Roche E. Single cell-derived clones from human adipose stem cells present different immunomodulatory properties. Clin Exp Immunol 2014; 176:255-65. [PMID: 24666184 PMCID: PMC3992038 DOI: 10.1111/cei.12270] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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] [Accepted: 01/07/2014] [Indexed: 12/18/2022] Open
Abstract
Human adipose mesenchymal stem cells are a heterogeneous population, where cell cultures derived from single-cell-expanded clones present varying degrees of differential plasticity. This work focuses on the immunomodulatory/anti-inflammatory properties of these cells. To this end, five single-cell clones were isolated (generally called 1.X and 3.X) from two volunteers. Regarding the expression level of the lineage-characteristic surface antigens, clones 1·10 and 1·22 expressed the lowest amounts, while clones 3·10 and 3·5 expressed more CD105 than the rest and clone 1·7 expressed higher amounts of CD73 and CD44. Regarding cytokine secretion, all clones were capable of spontaneously releasing high levels of interleukin (IL)-6 and low to moderate levels of IL-8. These differences can be explained in part by the distinct methylation profile exhibited by the clones. Furthermore, and after lipopolysaccharide stimulation, clone 3.X produced the highest amounts of proinflammatory cytokines such as IL-1β, while clones 1·10 and 1·22 highly expressed IL-4 and IL-5. In co-culture experiments, clones 1.X are, together, more potent inhibitors than clones 3.X for proliferation of total, CD3(+) T, CD4(+) T and CD8(+) T lymphocytes and natural killer (NK) cells. The results of this work indicate that the adipose stem cell population is heterogeneous in cytokine production profile, and that isolation, characterization and selection of the appropriate cell clone is a more exact method for the possible treatment of different patients or pathologies.
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Affiliation(s)
- J M Sempere
- Immunology Division, Biotechnology Department, University of AlicanteSan Vicente del Raspeig, Alicante, Spain
| | - P Martinez-Peinado
- Immunology Division, Biotechnology Department, University of AlicanteSan Vicente del Raspeig, Alicante, Spain
| | - M I Arribas
- Biochemistry and Cell Therapy Unit, Institute of Bioengineering, University Miguel HernandezElche, Alicante, Spain
| | - J A Reig
- Biochemistry and Cell Therapy Unit, Institute of Bioengineering, University Miguel HernandezElche, Alicante, Spain
| | - M L De La Sen
- Immunology Division, Biotechnology Department, University of AlicanteSan Vicente del Raspeig, Alicante, Spain
| | - J J Zubcoff
- Department of Statistics, University of AlicanteSan Vicente del Raspeig, Alicante, Spain
| | - M F Fraga
- Department of Immunology and Oncology, National Center for Biotechnology, CNB-CSICCantoblanco, Madrid, Spain
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, University of OviedoOviedo, Asturias, Spain
| | - A F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, University of OviedoOviedo, Asturias, Spain
| | - A Santana
- Research Unit, Gran Canaria Hospital Dr Negrin and Genetic Unit, Childhood Hospital ComplexLas Palmas, Canary Islands, Spain
| | - E Roche
- Biochemistry and Cell Therapy Unit, Institute of Bioengineering, University Miguel HernandezElche, Alicante, Spain
- CIBERobn (Fisiopatología de la Obesidad y la Nutrición CB12/03/30038), Instituto de Salud Carlos IIIMajadahonda, Madrid, Spain
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Fernández AF, Martínez MA, Ruiz J, Torres R, Faife B, Torres JR, Escoto CM. Six years of experience in laparoscopic surgery of esophageal achalasia. Surg Endosc 2003; 17:153-6. [PMID: 12399873 DOI: 10.1007/s00464-002-8576-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [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: 03/01/2002] [Accepted: 07/25/2002] [Indexed: 02/06/2023]
Abstract
BACKGROUND We show the experience of 6 years in laparoscopic surgical therapy of esophageal achalasia, performing of the Heller-Dor or Heller-Toupet operation, with particular regard to the technical aspect. METHODS One hundred and ten laparoscopic interventions were done between November 1995 and December 2001. We studied operative time in hiatus approach, esophagocardiomyotomy, transoperative endoscopy, and anti-reflux procedure. We also analyzed the relation between complications and clinical evolution of disease with clinical stage. RESULTS The mean surgical time of the intervention is 138 min, and it is significantly increased by transoperative endoscopic control; conversion to open surgery was not necessary. Clinical results are classified as excellent in 103 patients. Morbidity was 6%. CONCLUSION This surgical procedure is a first line in the treatment of esophageal achalasia. It is necessary to have special care in early diagnostic cases to avoid electrosurgical injury.
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Affiliation(s)
- A F Fernández
- Centro de Cirugía Endoscópica, Hospital Universitario General Calixto García, Ave de la Universidad y calle J. La Habana, Cuba CP: 10 400.
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9
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Rodríguez DL, López CA, Cobos EB, Blanco AJ, Fernández AF, Araujo LF. Invasive cerebral aspergillosis in a patient with aplastic anemia. Response to liposomal amphotericin and surgery. Haematologica 1999; 84:758-9. [PMID: 10457420] [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: 02/13/2023] Open
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10
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Fernandez AI, Fernández AF, Pérez MJ, Nieto TP, Ellis AE. Siderophore production by Aeromonas salmonicida subsp. salmonicida. Lack of strain specificity. Dis Aquat Organ 1998; 33:87-92. [PMID: 9684314 DOI: 10.3354/dao033087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Siderophore production, presence of iron-regulated outer membrane proteins and siderophore specificity was determined among 17 isolates of Aeromonas salmonicida subsp. salmonicida obtained from Spain and Scotland. All grew in the presence of ethylenediamine di(o-hydroxyphenylacetic acid) (EDDA) and siderophore production was detected using chrome azurol S (CAS) agar, confirming the presence of a high-affinity siderophore iron-uptake mechanism. The Arnow test confirmed that all isolates produced a catechol siderophore. Cross-feeding assays with indicator bacteria showed the absence of anguibactin, enterobactin, 2,3-dihydroxybenzoic acid (DHBA) and the hydroxamate siderophore, aerobactin, in the iron-restricted supernants of a representative isolate which cross fed 15/17 A. salmonicida isolates tested. Sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) showed the presence of the same 2 major iron-regulated outer membrane proteins (IROMPs) in all isolates when grown in iron-restricted conditions and siderophore strain specificity as assessed by cross-feeding experiments was not apparent. Thus, with respect to IROMP and siderophore production A. salmonicida appears to be a homogeneous species.
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Affiliation(s)
- A I Fernandez
- Dpto Biología Funcional y Ciencias de la Salud, Facultad de Ciencias, Universidad de Vigo, Spain
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