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Aguirre-Pranzoni C, García MG, Ochoa NA. Structural and conformational changes on chitosan after green heterogeneous synthesis of phenyl derivatives. Carbohydr Polym 2023; 312:120843. [PMID: 37059516 DOI: 10.1016/j.carbpol.2023.120843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023]
Abstract
Four aromatic acid compounds: benzoic acid (Bz), 4-hydroxyphenylpropionic acid (HPPA), gallic acid (GA) and 4-aminobenzoic acid (PABA) were covalently bonded to chitosan in order to improve water solubility at neutral pH. The synthesis was performed via a radical redox reaction in heterogeneous phase by employing ascorbic acid and hydrogen peroxide (AA/H2O2) as radical initiators in ethanol. The analysis of chemical structure and conformational changes on acetylated chitosan was also the focus of this research. Grafted samples exhibited as high as 0.46 M degree of substitution (MS) and excellent solubility in water at neutral pH. Results showed a correlation between the disruption of C3-C5 (O3…O5) hydrogen bonds with increasing solubility in grafted samples. Spectroscopic techniques such as FT-IR and 1H and 13C NMR showed modifications in both glucosamine and N-Acetyl-glucosamine units by ester and amide linkage at C2, C3 and C6 position, respectively. Finally, loss of crystalline structure of 2-helical conformation of chitosan after grafting was observed by XRD and correlated with 13C CP-MAS-NMR analyses.
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2
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López V, Tejedor JR, Carella A, García MG, Santamarina-Ojeda P, Pérez RF, Mangas C, Urdinguio RG, Aranburu A, de la Nava D, Corte-Torres MD, Astudillo A, Mollejo M, Meléndez B, Fernández AF, Fraga MF. Epigenetic Deregulation of the Histone Methyltransferase KMT5B Contributes to Malignant Transformation in Glioblastoma. Front Cell Dev Biol 2021; 9:671838. [PMID: 34447744 PMCID: PMC8383299 DOI: 10.3389/fcell.2021.671838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Received: 02/24/2021] [Accepted: 07/15/2021] [Indexed: 01/18/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most common and aggressive type of brain tumor in adulthood. Epigenetic mechanisms are known to play a key role in GBM although the involvement of histone methyltransferase KMT5B and its mark H4K20me2 has remained largely unexplored. The present study shows that DNA hypermethylation and loss of DNA hydroxymethylation is associated with KMT5B downregulation and genome-wide reduction of H4K20me2 levels in a set of human GBM samples and cell lines as compared with non-tumoral specimens. Ectopic overexpression of KMT5B induced tumor suppressor-like features in vitro and in a mouse tumor xenograft model, as well as changes in the expression of several glioblastoma-related genes. H4K20me2 enrichment was found immediately upstream of the promoter regions of a subset of deregulated genes, thus suggesting a possible role for KMT5B in GBM through the epigenetic modulation of key target cancer genes.
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Affiliation(s)
- Virginia López
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Juan Ramón Tejedor
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Antonella Carella
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - María G García
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Pablo Santamarina-Ojeda
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Raúl F Pérez
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Cristina Mangas
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Rocío G Urdinguio
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Aitziber Aranburu
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Daniel de la Nava
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - María D Corte-Torres
- Biobanco del Principado de Asturias, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Aurora Astudillo
- Departamento de Anatomía Patológica, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Manuela Mollejo
- Departamento de Patología, Hospital Virgen de la Salud (CHT), Toledo, Spain
| | - Bárbara Meléndez
- Departamento de Patología, Hospital Virgen de la Salud (CHT), Toledo, Spain
| | - Agustín F Fernández
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
| | - Mario F Fraga
- Cancer Epigenetics and Nanomedicine Laboratory, Department of Organisms and Systems Biology, Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Health Research Institute of Asturias (ISPA), Institute of Oncology of Asturias (IUOPA), Rare Diseases CIBER (CIBERER) of the Carlos III Health Institute (ISCIII), University of Oviedo, Oviedo, Spain
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3
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García MG, Pérez-Cárceles MD, Osuna E, Legaz I. Drug-facilitated sexual assault and other crimes: A systematic review by countries. J Forensic Leg Med 2021; 79:102151. [PMID: 33773270 DOI: 10.1016/j.jflm.2021.102151] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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] [Received: 10/14/2020] [Revised: 12/16/2020] [Accepted: 03/07/2021] [Indexed: 11/17/2022]
Abstract
Drug-facilitated sexual assault (DFSA) and drug-facilitated crime (DFC) constitute a mode of violence that is generally unknown to the population and may go unnoticed by health professionals. The aim of this systematic review was to analyze the victims of DFC, compiling their sociodemographic characteristics, the toxic substances used and their biological matrices and modes of action, in order to identify the substances that are commonly put to criminal use. The aim would be to establish political and health strategies that inform and warn people about possible criminal social behaviors consequent danger to health. This systematic review was conducted following the PRISMA guidelines. Alcohol, benzodiazepines and cocaine were among the most commonly detected substances. In most of the hospitals, immunoassays, liquid chromatography (LC-MS), or gas chromatography-mass spectrometry (GC-MS) analyses were used to identify the substances, while the most frequently used biological matrices were blood and urine. From a judicial point of view, the instrumental protocols and techniques followed for the detection of toxics in different biological matrices must guarantee the reliability and validity of the results for use in a court of law. The recommendations of international organizations should be followed and must be called upon to strengthen their respective national laws against this chemical submission (CS) phenomenon.
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Affiliation(s)
- M G García
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence "Campus Mare Nostrum", Faculty of Medicine, University of Murcia, Murcia, Spain
| | - M D Pérez-Cárceles
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence "Campus Mare Nostrum", Faculty of Medicine, University of Murcia, Murcia, Spain
| | - E Osuna
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence "Campus Mare Nostrum", Faculty of Medicine, University of Murcia, Murcia, Spain
| | - I Legaz
- Department of Legal and Forensic Medicine, Biomedical Research Institute (IMIB), Regional Campus of International Excellence "Campus Mare Nostrum", Faculty of Medicine, University of Murcia, Murcia, Spain.
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4
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Urdinguio RG, Lopez V, Bayón GF, Diaz de la Guardia R, Sierra MI, García-Toraño E, Perez RF, García MG, Carella A, Pruneda PC, Prieto C, Dmitrijeva M, Santamarina P, Belmonte T, Mangas C, Diaconu E, Ferrero C, Tejedor JR, Fernandez-Morera JL, Bravo C, Bueno C, Sanjuan-Pla A, Rodriguez RM, Suarez-Alvarez B, López-Larrea C, Bernal T, Colado E, Balbín M, García-Suarez O, Chiara MD, Sáenz-de-Santa-María I, Rodríguez F, Pando-Sandoval A, Rodrigo L, Santos L, Salas A, Vallejo-Díaz J, C Carrera A, Rico D, Hernández-López I, Vayá A, Ricart JM, Seto E, Sima-Teruel N, Vaquero A, Valledor L, Cañal MJ, Pisano D, Graña-Castro O, Thomas T, Voss AK, Menéndez P, Villar-Garea A, Deutzmann R, Fernandez AF, Fraga MF. Chromatin regulation by Histone H4 acetylation at Lysine 16 during cell death and differentiation in the myeloid compartment. Nucleic Acids Res 2019; 47:5016-5037. [PMID: 30923829 PMCID: PMC6547425 DOI: 10.1093/nar/gkz195] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 06/29/2018] [Revised: 02/26/2019] [Accepted: 03/15/2019] [Indexed: 12/14/2022] Open
Abstract
Histone H4 acetylation at Lysine 16 (H4K16ac) is a key epigenetic mark involved in gene regulation, DNA repair and chromatin remodeling, and though it is known to be essential for embryonic development, its role during adult life is still poorly understood. Here we show that this lysine is massively hyperacetylated in peripheral neutrophils. Genome-wide mapping of H4K16ac in terminally differentiated blood cells, along with functional experiments, supported a role for this histone post-translational modification in the regulation of cell differentiation and apoptosis in the hematopoietic system. Furthermore, in neutrophils, H4K16ac was enriched at specific DNA repeats. These DNA regions presented an accessible chromatin conformation and were associated with the cleavage sites that generate the 50 kb DNA fragments during the first stages of programmed cell death. Our results thus suggest that H4K16ac plays a dual role in myeloid cells as it not only regulates differentiation and apoptosis, but it also exhibits a non-canonical structural role in poising chromatin for cleavage at an early stage of neutrophil cell death.
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Affiliation(s)
- Rocio G Urdinguio
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Virginia Lopez
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain
| | - Gustavo F Bayón
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rafael Diaz de la Guardia
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Cáncer (CIBER-ONC), Barcelona, Spain
| | - Marta I Sierra
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Estela García-Toraño
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Raúl F Perez
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - María G García
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Antonella Carella
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Patricia C Pruneda
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Cristina Prieto
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Marija Dmitrijeva
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Pablo Santamarina
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Thalía Belmonte
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain.,Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Cristina Mangas
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Elena Diaconu
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Cecilia Ferrero
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Juan Ramón Tejedor
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Juan Luis Fernandez-Morera
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Cristina Bravo
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Clara Bueno
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Cáncer (CIBER-ONC), Barcelona, Spain
| | - Alejandra Sanjuan-Pla
- Hematology Research Group, Instituto de Investigación Sanitaria La Fe (IIS La Fe), Valencia, 46026, Spain
| | - Ramon M Rodriguez
- Translational Immunology Laboratory, Instituto de Investigación Sanitarias del Principado de Asturias (ISPA), Immunology Department, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Beatriz Suarez-Alvarez
- Translational Immunology Laboratory, Instituto de Investigación Sanitarias del Principado de Asturias (ISPA), Immunology Department, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Carlos López-Larrea
- Translational Immunology Laboratory, Instituto de Investigación Sanitarias del Principado de Asturias (ISPA), Immunology Department, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Teresa Bernal
- Servicio de Hematología, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Enrique Colado
- Servicio de Hematología, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Milagros Balbín
- Service of Molecular Oncology, Hospital Universitario Central de Asturias, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Oviedo, Spain
| | - Olivia García-Suarez
- Department of Morphology and Cellular Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
| | - María Dolores Chiara
- Otorhinolaryngology Service, Hospital Universitario Central de Asturias, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, CIBERONC, Oviedo, Spain
| | - Inés Sáenz-de-Santa-María
- Otorhinolaryngology Service, Hospital Universitario Central de Asturias, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, CIBERONC, Oviedo, Spain
| | - Francisco Rodríguez
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología (IUOPA), Universidad de Oviedo, Oviedo, Spain
| | - Ana Pando-Sandoval
- Hospital Universitario Central de Asturias (HUCA), Instituto Nacional de Silicosis (INS), Área del Pulmón, Facultad de Medicina, Universidad de Oviedo, Avenida Roma s/n, Oviedo, Asturias 33011, Spain
| | - Luis Rodrigo
- Hospital Universitario Central de Asturias (HUCA), Gastroenterology Service, Facultad de Medicina, Universidad de Oviedo, Avenida de Roma s/n, Oviedo, Asturias 33011, Spain
| | - Laura Santos
- Fundación para la Investigación Biosanitaria de Asturias (FINBA). Instituto de Investigación Sanitaria del Principado de Asturias (ISPA). Avenida de Roma s/n, 33011 Oviedo. Asturias. España
| | - Ana Salas
- Cytometry Service, Servicios Científico-Técnicos (SCTs). Universidad de Oviedo, Oviedo, Spain
| | - Jesús Vallejo-Díaz
- Department of Immunology and Oncology, National Center for Biotechnology, CNB-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Ana C Carrera
- Department of Immunology and Oncology, National Center for Biotechnology, CNB-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Daniel Rico
- Institute of Cellular Medicine, Newcastle University, UK
| | | | - Amparo Vayá
- Hemorheology and Haemostasis Unit, Service of Clinical Pathology, La Fe University Hospital, Valencia, Spain
| | | | - Edward Seto
- George Washington University Cancer Center, Department of Biochemistry and Molecular Medicine, George Washington University, Washington, DC 20037, USA
| | - Núria Sima-Teruel
- Chromatin Biology Laboratory, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Av. Gran Via de l'Hospitalet, 199-203, 08907- L'Hospitalet de Llobregat, Barcelona, Spain
| | - Alejandro Vaquero
- Chromatin Biology Laboratory, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Av. Gran Via de l'Hospitalet, 199-203, 08907- L'Hospitalet de Llobregat, Barcelona, Spain
| | - Luis Valledor
- Plant Physiology Lab, Department of Organisms and Systems Biology, Faculty of Biology, University of Oviedo, Oviedo, Asturias, Spain
| | - Maria Jesus Cañal
- Plant Physiology Lab, Department of Organisms and Systems Biology, Faculty of Biology, University of Oviedo, Oviedo, Asturias, Spain
| | - David Pisano
- Bioinformatics Unit, Structural Biology and Biocomputing Program, Spanish National Cancer Research Center (CNIO), C/ Melchor Fernández Almagro, 3. 28029 Madrid, Spain
| | - Osvaldo Graña-Castro
- Bioinformatics Unit, Structural Biology and Biocomputing Program, Spanish National Cancer Research Center (CNIO), C/ Melchor Fernández Almagro, 3. 28029 Madrid, Spain
| | - Tim Thomas
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Anne K Voss
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Pablo Menéndez
- Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red en Cáncer (CIBER-ONC), Barcelona, Spain.,Instituciò Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Ana Villar-Garea
- Institute of Biochemistry, Genetics and Microbiology, University of Regensburg, 93053 Regensburg, Germany
| | - Rainer Deutzmann
- Institute of Biochemistry, Genetics and Microbiology, University of Regensburg, 93053 Regensburg, Germany
| | - Agustín F Fernandez
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), ISPA-Hospital Universitario Central de Asturias HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo-Principado de Asturias, Spain
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5
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Carella A, Tejedor JR, García MG, Urdinguio RG, Bayón GF, Sierra M, López V, García‐Toraño E, Santamarina‐Ojeda P, Pérez RF, Bigot T, Mangas C, Corte‐Torres MD, Sáenz‐de‐Santa‐María I, Mollejo M, Meléndez B, Astudillo A, Chiara MD, Fernández AF, Fraga MF. Epigenetic downregulation of TET3 reduces genome‐wide 5hmC levels and promotes glioblastoma tumorigenesis. Int J Cancer 2019; 146:373-387. [DOI: 10.1002/ijc.32520] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 05/13/2019] [Accepted: 06/04/2019] [Indexed: 01/16/2023]
Affiliation(s)
- Antonella Carella
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - Juan R. Tejedor
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
- Fundación para la Investigación Biosanitaria de Asturias (FINBA)Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Oviedo Spain
| | - María G. García
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - Rocío G. Urdinguio
- Nanomaterials and Nanotechnology Research Center (CINN‐CSIC)Universidad de Oviedo Oviedo Spain
| | - Gustavo F. Bayón
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - Marta Sierra
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - Virginia López
- Nanomaterials and Nanotechnology Research Center (CINN‐CSIC)Universidad de Oviedo Oviedo Spain
| | - Estela García‐Toraño
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - Pablo Santamarina‐Ojeda
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
- Fundación para la Investigación Biosanitaria de Asturias (FINBA)Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Oviedo Spain
| | - Raúl F. Pérez
- Nanomaterials and Nanotechnology Research Center (CINN‐CSIC)Universidad de Oviedo Oviedo Spain
| | - Timothée Bigot
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
- Fundación para la Investigación Biosanitaria de Asturias (FINBA)Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Oviedo Spain
| | - Cristina Mangas
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
| | - María D. Corte‐Torres
- Hospital Universitario Central de Asturias (HUCA)Biobanco del Principado de Asturias Oviedo Spain
| | - Inés Sáenz‐de‐Santa‐María
- Hospital Universitario Central de Asturias (HUCA), Servicio de Otorrinolaringología, Instituto Universitario de Oncología del Principado de Asturias (IUOPA)Universidad de Oviedo, CIBERONC Oviedo Spain
| | - Manuela Mollejo
- Departamento de PatologíaHospital Virgen de la Salud (CHT) Toledo Spain
| | - Bárbara Meléndez
- Departamento de PatologíaHospital Virgen de la Salud (CHT) Toledo Spain
| | - Aurora Astudillo
- Departamento de Anatomía PatológicaHospital Universitario Central de Asturias (HUCA) Oviedo Spain
| | - María D. Chiara
- Hospital Universitario Central de Asturias (HUCA), Servicio de Otorrinolaringología, Instituto Universitario de Oncología del Principado de Asturias (IUOPA)Universidad de Oviedo, CIBERONC Oviedo Spain
| | - Agustín F. Fernández
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Hospital Universitario Central de Asturias (HUCA)Universidad de Oviedo Oviedo Spain
- Fundación para la Investigación Biosanitaria de Asturias (FINBA)Instituto de Investigación Sanitaria del Principado de Asturias (ISPA) Oviedo Spain
| | - Mario F. Fraga
- Nanomaterials and Nanotechnology Research Center (CINN‐CSIC)Universidad de Oviedo Oviedo Spain
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6
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Fernández AF, Bayón GF, Urdinguio RG, Toraño EG, García MG, Carella A, Petrus-Reurer S, Ferrero C, Martinez-Camblor P, Cubillo I, García-Castro J, Delgado-Calle J, Pérez-Campo FM, Riancho JA, Bueno C, Menéndez P, Mentink A, Mareschi K, Claire F, Fagnani C, Medda E, Toccaceli V, Brescianini S, Moran S, Esteller M, Stolzing A, de Boer J, Nisticò L, Stazi MA, Fraga MF. Corrigendum: H3K4me1 marks DNA regions hypomethylated during aging in human stem and differentiated cells. Genome Res 2019; 29:710.2. [PMID: 30936177 DOI: 10.1101/gr.249417.119] [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: 11/24/2022]
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7
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García MG, Carella A, Urdinguio RG, Bayón GF, Lopez V, Tejedor JR, Sierra MI, García-Toraño E, Santamarina P, Perez RF, Mangas C, Astudillo A, Corte-Torres MD, Sáenz-de-Santa-María I, Chiara MD, Fernández AF, Fraga MF. Epigenetic dysregulation of TET2 in human glioblastoma. Oncotarget 2018; 9:25922-25934. [PMID: 29899831 PMCID: PMC5995234 DOI: 10.18632/oncotarget.25406] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [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] [Received: 09/08/2017] [Accepted: 04/28/2018] [Indexed: 02/06/2023] Open
Abstract
Ten-eleven translocation (TET) enzymes are frequently deregulated in cancer, but the underlying molecular mechanisms are still poorly understood. Here we report that TET2 shows frequent epigenetic alterations in human glioblastoma including DNA hypermethylation and hypo-hydroxymethylation, as well as loss of histone acetylation. Ectopic overexpression of TET2 regulated neural differentiation in glioblastoma cell lines and impaired tumor growth. Our results suggest that epigenetic dysregulation of TET2 plays a role in human glioblastoma.
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Affiliation(s)
- María G García
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain.,Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo, El Entrego, Asturias, Spain
| | - Antonella Carella
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain.,Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo, El Entrego, Asturias, Spain
| | - Rocío G Urdinguio
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo, El Entrego, Asturias, Spain
| | - Gustavo F Bayón
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Virginia Lopez
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo, El Entrego, Asturias, Spain
| | - Juan Ramón Tejedor
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain.,Fundación para la Investigación Biosanitaria de Asturias (FINBA), Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Marta I Sierra
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Estela García-Toraño
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Pablo Santamarina
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Raúl F Perez
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Cristina Mangas
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Aurora Astudillo
- Department of Pathology, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - M Daniela Corte-Torres
- Biobanco del Principado de Asturias, Hospital Universitario Central de Asturias (HUCA), Oviedo, Spain
| | - Inés Sáenz-de-Santa-María
- Otorhinolaryngology Service, Hospital Universitario Central de Asturias, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, CIBERONC, Oviedo, Spain
| | - María-Dolores Chiara
- Otorhinolaryngology Service, Hospital Universitario Central de Asturias, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, CIBERONC, Oviedo, Spain
| | - Agustín F Fernández
- Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain.,Fundación para la Investigación Biosanitaria de Asturias (FINBA), Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo, El Entrego, Asturias, Spain
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8
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Santucci L, Carol E, Borzi G, García MG. Hydrogeochemical and isotopic signature of surface and groundwater in a highly industrialized sector of the Rio de la Plata coastal plain (Argentina). Mar Pollut Bull 2017; 120:387-395. [PMID: 28483142 DOI: 10.1016/j.marpolbul.2017.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 04/21/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
The coastal plain of the middle estuary of the Río de la Plata is a highly industrialized area and is densely populated by sectors. The main human activity in the sector encompassed between the cities of Ensenada and Berisso is associated with the petrochemical industry. In this work, hydrogeochemical and isotopic characteristics of surface and groundwater in the impacted area are analyzed and the results are contrasted with those obtained in an undisturbed protected area. Major and trace elements were determined using standardized methods while the stable isotopes δ18O y δ2H were analyzed by mass spectroscopy. Human impact is evidenced by the occurrence of large variations in the major chemical composition of water, and also by the elevated concentrations of some trace elements that are not contributed from natural sources. These results may contribute to the understanding of chemical processes and pollutants distribution in highly industrialized coastal plain areas.
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Affiliation(s)
- L Santucci
- Centro de Investigaciones Geológicas (CIG), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Universidad Nacional de La Plata (UNLP), Calle 64 y Diag, 113, 1900 La Plata, Buenos Aires, Argentina.
| | - E Carol
- Centro de Investigaciones Geológicas (CIG), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Universidad Nacional de La Plata (UNLP), Calle 64 y Diag, 113, 1900 La Plata, Buenos Aires, Argentina
| | - G Borzi
- Centro de Investigaciones Geológicas (CIG), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Universidad Nacional de La Plata (UNLP), Calle 64 y Diag, 113, 1900 La Plata, Buenos Aires, Argentina
| | - M G García
- Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET, and FCEFyN Universidad Nacional de Córdoba, Córdoba, Argentina
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9
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Affiliation(s)
- María G. García
- Instituto de Física Aplicada CONICET-Universidad Nacional de San Luis; Chacabuco 917 San Luis CP 5700 Argentina
| | - José Marchese
- Instituto de Física Aplicada CONICET-Universidad Nacional de San Luis; Chacabuco 917 San Luis CP 5700 Argentina
| | - Nelio A. Ochoa
- Instituto de Física Aplicada CONICET-Universidad Nacional de San Luis; Chacabuco 917 San Luis CP 5700 Argentina
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10
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Toraño EG, Bayón GF, Del Real Á, Sierra MI, García MG, Carella A, Belmonte T, Urdinguio RG, Cubillo I, García-Castro J, Delgado-Calle J, Pérez-Campo FM, Riancho JA, Fraga MF, Fernández AF. Age-associated hydroxymethylation in human bone-marrow mesenchymal stem cells. J Transl Med 2016; 14:207. [PMID: 27393146 PMCID: PMC4938941 DOI: 10.1186/s12967-016-0966-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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] [Received: 04/06/2016] [Accepted: 07/01/2016] [Indexed: 12/20/2022] Open
Abstract
Background Age-associated changes in genomic DNA methylation have been primarily attributed to 5-methylcytosine (5mC). However, the recent discovery of 5-hydroxymethylcytosine (5hmC) suggests that this epigenetic mark might also play a role in the process. Methods Here, we analyzed the genome-wide profile of 5hmc in mesenchymal stem cells (MSCs) obtained from bone-marrow donors, aged 2–89 years. Results We identified 10,685 frequently hydroxymethylated CpG sites in MSCs that were, as in other cell types, significantly associated with low density CpG regions, introns, the histone posttranslational modification H3k4me1 and enhancers. Study of the age-associated changes to 5hmC identified 785 hyper- and 846 hypo-hydroxymethylated CpG sites in the MSCs obtained from older individuals. Conclusions DNA hyper-hydroxymethylation in the advanced-age group was associated with loss of 5mC, which suggests that, at specific CpG sites, this epigenetic modification might play a role in DNA methylation changes during lifetime. Since bone-marrow MSCs have many clinical applications, and the fact that the epigenomic alterations in this cell type associated with aging identified in this study could have associated functional effects, the age of donors should be taken into account in clinical settings. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0966-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Estela G Toraño
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Gustavo F Bayón
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Álvaro Del Real
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Marta I Sierra
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - María G García
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Antonella Carella
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Thalia Belmonte
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Rocío G Urdinguio
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain
| | - Isabel Cubillo
- Unidad de Biotecnología Celular, Área de Genética Humana, Instituto de Salud Carlos III, Madrid, Spain
| | - Javier García-Castro
- Unidad de Biotecnología Celular, Área de Genética Humana, Instituto de Salud Carlos III, Madrid, Spain
| | - Jesús Delgado-Calle
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, Santander, Spain
| | - Flor M Pérez-Campo
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, Santander, Spain
| | - José A Riancho
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, Santander, Spain
| | - Mario F Fraga
- Nanomaterials and Nanotechnology Research Center (CINN-CSIC)-Universidad de Oviedo-Principado de Asturias, El Entrego, Spain.
| | - Agustín F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, Oviedo, Spain.
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11
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Nieva NE, Borgnino L, Locati F, García MG. Mineralogical control on arsenic release during sediment-water interaction in abandoned mine wastes from the Argentina Puna. Sci Total Environ 2016; 550:1141-1151. [PMID: 26889947 DOI: 10.1016/j.scitotenv.2016.01.147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/19/2015] [Accepted: 01/22/2016] [Indexed: 06/05/2023]
Abstract
The sulfide-rich residues of La Concordia mine, Argentina Puna, are accumulated in tailing dams that remained exposed to the weathering agents for almost 30years. In such period of time, a complex sequence of redox and dissolution/precipitation reactions occurred, leading to the gradual oxidation of the wastes and the formation of weathering profiles. The sources of arsenic in the wastes were analyzed by XRD and SEM/EDS analysis while a standardized sequential extraction procedure was followed to define solid As associations. In addition, the release of As during sediment-water interaction was analyzed in a period of 10months. The results indicate that primary As-bearing minerals are arsenian pyrite and polymetallic sulfides. As-jarosite and scarce arsenates are the only secondary As-bearing minerals identified by XRD and SEM/EDS. However, the rapid release (i.e., <1h) of arsenic from suspensions of the studied sediments in water, seems to be associated to the dissolution of highly soluble (hydrous)sulfates, as it was determined in samples of the efflorescences that cover the entire site. Contributions from the more abundant As-jarosite are also expected in longer periods of sediment-water interaction, due to its low rate of dissolution in acid and oxic conditions. Finally, near 30% of As remains adsorbed onto Fe (hydr)oxides thus representing a hazardous reservoir with the potential of mobilizing As into porewaters and streamwaters if the acidic and oxidizing conditions that predominate in the region are altered.
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Affiliation(s)
- N E Nieva
- Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET - UNC
| | - L Borgnino
- Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET - UNC; FCEFyN Universidad Nacional de Córdoba, Córdoba, Argentina
| | - F Locati
- Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET - UNC
| | - M G García
- Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), CONICET - UNC; FCEFyN Universidad Nacional de Córdoba, Córdoba, Argentina.
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12
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Menendez JA, Corominas-Faja B, Cuyàs E, García MG, Fernández-Arroyo S, Fernández AF, Joven J, Fraga MF, Alarcón T. Oncometabolic Nuclear Reprogramming of Cancer Stemness. Stem Cell Reports 2016; 6:273-83. [PMID: 26876667 PMCID: PMC4788754 DOI: 10.1016/j.stemcr.2015.12.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 12/30/2015] [Accepted: 12/31/2015] [Indexed: 12/18/2022] Open
Abstract
By impairing histone demethylation and locking cells into a reprogramming-prone state, oncometabolites can partially mimic the process of induced pluripotent stem cell generation. Using a systems biology approach, combining mathematical modeling, computation, and proof-of-concept studies with live cells, we found that an oncometabolite-driven pathological version of nuclear reprogramming increases the speed and efficiency of dedifferentiating committed epithelial cells into stem-like states with only a minimal core of stemness transcription factors. Our biomathematical model, which introduces nucleosome modification and epigenetic regulation of cell differentiation genes to account for the direct effects of oncometabolites on nuclear reprogramming, demonstrates that oncometabolites markedly lower the “energy barriers” separating non-stem and stem cell attractors, diminishes the average time of nuclear reprogramming, and increases the size of the basin of attraction of the macrostate occupied by stem cells. These findings establish the concept of oncometabolic nuclear reprogramming of stemness as a bona fide metabolo-epigenetic mechanism for generation of cancer stem-like cells. Oncometabolites facilitate the reprogramming process evoked by stemness factors Oncometabolites lower the epigenetic barriers to nuclear reprogramming Cancer stem-like states arise through oncometabolic nuclear reprogramming phenomena Oncometabolic regulation of epigenetics can drive stemness in cancer tissues
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Affiliation(s)
- Javier A Menendez
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, 17007 Girona, Catalonia, Spain; Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), 17190 Salt, Catalonia, Spain; Girona Biomedical Research Institute (IDIBGI), Parc Hospitalari Martí i Julià, Edifici M2, E-17190 Salt, Girona, Spain.
| | - Bruna Corominas-Faja
- Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), 17190 Salt, Catalonia, Spain
| | - Elisabet Cuyàs
- Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), 17190 Salt, Catalonia, Spain
| | - María G García
- Cancer Epigenetics Laboratory, Instituto Universitario de Oncología del Principado de Asturias (IUOPA-HUCA), Universidad de Oviedo, 33006 Oviedo, Spain
| | - Salvador Fernández-Arroyo
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, 43201 Reus, Spain
| | - Agustín F Fernández
- Cancer Epigenetics Laboratory, Instituto Universitario de Oncología del Principado de Asturias (IUOPA-HUCA), Universidad de Oviedo, 33006 Oviedo, Spain
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, 43201 Reus, Spain
| | - Mario F Fraga
- Cancer Epigenetics Laboratory, Instituto Universitario de Oncología del Principado de Asturias (IUOPA-HUCA), Universidad de Oviedo, 33006 Oviedo, Spain; Nanomaterials and Nanotechnology Research Center (CINN-CSIC), 33940 San Martín del Rey Aurelio, Spain
| | - Tomás Alarcón
- Institució Catalana d'Estudis i Recerca Avançats (ICREA), 08010 Barcelona, Spain; Computational & Mathematical Biology Research Group, Centre de Recerca Matemàtica (CRM), 08193 Barcelona, Spain; Departament de Matemàtiques, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; Barcelona Graduate School of Mathematics (BGSMath), 08193 Barcelona, Spain; Centre de Recerca Matemàtica (CRM), Office 29 (C3b/140), Edifici C, Campus de Bellaterra, E-08193 Bellaterra, Barcelona, Spain.
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13
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Peixoto E, Atorrasagasti C, Aquino JB, Militello R, Bayo J, Fiore E, Piccioni F, Salvatierra E, Alaniz L, García MG, Bataller R, Corrales F, Gidekel M, Podhajcer O, Colombo MI, Mazzolini G. SPARC (secreted protein acidic and rich in cysteine) knockdown protects mice from acute liver injury by reducing vascular endothelial cell damage. Gene Ther 2014; 22:9-19. [PMID: 25410742 DOI: 10.1038/gt.2014.102] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 09/19/2014] [Accepted: 09/24/2014] [Indexed: 12/24/2022]
Abstract
Secreted protein, acidic and rich in cysteine (SPARC) is involved in many biological process including liver fibrogenesis, but its role in acute liver damage is unknown. To examine the role of SPARC in acute liver injury, we used SPARC knock-out (SPARC(-/-)) mice. Two models of acute liver damage were used: concanavalin A (Con A) and the agonistic anti-CD95 antibody Jo2. SPARC expression levels were analyzed in liver samples from patients with acute-on-chronic alcoholic hepatitis (AH). SPARC expression is increased on acute-on-chronic AH patients. Knockdown of SPARC decreased hepatic damage in the two models of liver injury. SPARC(-/-) mice showed a marked reduction in Con A-induced necroinflammation. Infiltration by CD4+ T cells, expression of tumor necrosis factor-α and interleukin-6 and apoptosis were attenuated in SPARC(-/-) mice. Sinusoidal endothelial cell monolayer was preserved and was less activated in Con A-treated SPARC(-/-) mice. SPARC knockdown reduced Con A-induced autophagy of cultured human microvascular endothelial cells (HMEC-1). Hepatic transcriptome analysis revealed several gene networks that may have a role in the attenuated liver damaged found in Con A-treated SPARC(-/-) mice. SPARC has a significant role in the development of Con A-induced severe liver injury. These results suggest that SPARC could represent a therapeutic target in acute liver injury.
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Affiliation(s)
- E Peixoto
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - C Atorrasagasti
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - J B Aquino
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - R Militello
- Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - J Bayo
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - E Fiore
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - F Piccioni
- Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina
| | - E Salvatierra
- Molecular and Cellular Therapy Laboratory, Fundación Instituto Leloir, Buenos Aires, Argentina
| | - L Alaniz
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - M G García
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
| | - R Bataller
- 1] University of North Carolina at Chapel Hill, Chapel Hill, NC, USA [2] Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - F Corrales
- CIMA, Universidad de Navarra, Pamplona, España
| | - M Gidekel
- 1] Universidad de la Frontera, Temuco, Chile. [2] Universidad Autónoma de Chile, Santiago, Chile
| | - O Podhajcer
- Molecular and Cellular Therapy Laboratory, Fundación Instituto Leloir, Buenos Aires, Argentina
| | - M I Colombo
- 1] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina [2] Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - G Mazzolini
- 1] Liver Unit, Gene Therapy Laboratory, Facultad de Ciencias Biomédicas, Universidad Austral, Buenos Aires, Argentina [2] CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Buenos Aires, Argentina
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14
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Fernández AF, Bayón GF, Urdinguio RG, Toraño EG, García MG, Carella A, Petrus-Reurer S, Ferrero C, Martinez-Camblor P, Cubillo I, García-Castro J, Delgado-Calle J, Pérez-Campo FM, Riancho JA, Bueno C, Menéndez P, Mentink A, Mareschi K, Claire F, Fagnani C, Medda E, Toccaceli V, Brescianini S, Moran S, Esteller M, Stolzing A, de Boer J, Nisticò L, Stazi MA, Fraga MF. H3K4me1 marks DNA regions hypomethylated during aging in human stem and differentiated cells. Genome Res 2014; 25:27-40. [PMID: 25271306 PMCID: PMC4317171 DOI: 10.1101/gr.169011.113] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [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: 12/17/2022]
Abstract
In differentiated cells, aging is associated with hypermethylation of DNA regions enriched in repressive histone post-translational modifications. However, the chromatin marks associated with changes in DNA methylation in adult stem cells during lifetime are still largely unknown. Here, DNA methylation profiling of mesenchymal stem cells (MSCs) obtained from individuals aged 2 to 92 yr identified 18,735 hypermethylated and 45,407 hypomethylated CpG sites associated with aging. As in differentiated cells, hypermethylated sequences were enriched in chromatin repressive marks. Most importantly, hypomethylated CpG sites were strongly enriched in the active chromatin mark H3K4me1 in stem and differentiated cells, suggesting this is a cell type–independent chromatin signature of DNA hypomethylation during aging. Analysis of scedasticity showed that interindividual variability of DNA methylation increased during aging in MSCs and differentiated cells, providing a new avenue for the identification of DNA methylation changes over time. DNA methylation profiling of genetically identical individuals showed that both the tendency of DNA methylation changes and scedasticity depended on nongenetic as well as genetic factors. Our results indicate that the dynamics of DNA methylation during aging depend on a complex mixture of factors that include the DNA sequence, cell type, and chromatin context involved and that, depending on the locus, the changes can be modulated by genetic and/or external factors.
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Affiliation(s)
- Agustín F Fernández
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Gustavo F Bayón
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Rocío G Urdinguio
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Estela G Toraño
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - María G García
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Antonella Carella
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Sandra Petrus-Reurer
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Cecilia Ferrero
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Pablo Martinez-Camblor
- Oficina de Investigación Biosanitaria (OIB-FICYT) de Asturias, 33005 Oviedo, Spain and Universidad Autónoma de Chile, Chile
| | - Isabel Cubillo
- Unidad de Biotecnología Celular, Área de Genética Humana, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Javier García-Castro
- Unidad de Biotecnología Celular, Área de Genética Humana, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jesús Delgado-Calle
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, 39011 Santander, Spain
| | - Flor M Pérez-Campo
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, 39011 Santander, Spain
| | - José A Riancho
- Department of Internal Medicine, Hospital U.M. Valdecilla, University of Cantabria, IDIVAL, 39011 Santander, Spain
| | - Clara Bueno
- Josep Carreras Leukemia Research Institute, School of Medicine, University of Barcelona, 08036 Barcelona, Spain
| | - Pablo Menéndez
- Josep Carreras Leukemia Research Institute, School of Medicine, University of Barcelona, 08036 Barcelona, Spain; Institut Català de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - Anouk Mentink
- MIRA Institute of Biomedical Technology and Technical Medicine, University of Twente, 7500 AE Enschede, The Netherlands
| | - Katia Mareschi
- Pediatric Onco-Hematology, Stem Cell Transplantation and Cellular Therapy Division, City of Science and Health of Turin, Regina Margherita Children's Hospital, 10126 Turin, Italy; Department of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy
| | - Fabian Claire
- Translational Centre for Regenerative Medicine, University of Leipzig, 04103 Leipzig, Germany
| | - Corrado Fagnani
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Emanuela Medda
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Virgilia Toccaceli
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Sonia Brescianini
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Sebastián Moran
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 Barcelona, Catalonia, Spain
| | - Manel Esteller
- Institut Català de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain; Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 Barcelona, Catalonia, Spain; Department of Physiological Sciences II, School of Medicine, University of Barcelona, 08036 Barcelona, Catalonia, Spain
| | - Alexandra Stolzing
- Translational Centre for Regenerative Medicine, University of Leipzig, 04103 Leipzig, Germany; Loughborough University, Wolfson School of Mechanical and Manufacturing Engineering, LE11 3TU Loughborough, United Kingdom
| | - Jan de Boer
- MIRA Institute of Biomedical Technology and Technical Medicine, University of Twente, 7500 AE Enschede, The Netherlands; cBITE laboratory, Merln Institute of Technology-inspired Regenerative Medicine, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Lorenza Nisticò
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Maria A Stazi
- Genetic Epidemiology Unit, National Centre of Epidemiology, Surveillance and Health Promotion; Istituto Superiore di Sanità; Viale Regina Elena 299, 00161, Rome, Italy
| | - Mario F Fraga
- Cancer Epigenetics Laboratory, Institute of Oncology of Asturias (IUOPA), HUCA, Universidad de Oviedo, 33006 Oviedo, Spain; Department of Immunology and Oncology, National Center for Biotechnology, CNB-CSIC, Cantoblanco, 28049 Madrid, Spain
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Slavutsky AM, Bertuzzi MA, Armada M, García MG, Ochoa NA. Preparation and characterization of montmorillonite/brea gum nanocomposites films. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.06.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Colmenarejo MF, Rubio A, Sánchez E, Vicente J, García MG, Borja R. Evaluation of municipal wastewater treatment plants with different technologies at Las Rozas, Madrid (Spain). J Environ Manage 2006; 81:399-404. [PMID: 16580126 DOI: 10.1016/j.jenvman.2005.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2005] [Revised: 11/14/2005] [Accepted: 11/16/2005] [Indexed: 05/08/2023]
Abstract
Eight small-scale municipal wastewater treatment plants were evaluated over a period of 19 months in the suburb of Las Rozas in Madrid (Spain). Four plants used compact extended aeration, two used conventional activated sludge, two used conventional extended aeration, one used a rotary biodisc reactor and the other used a peat bed reactor. The best results were obtained from the plants that used conventional technologies and the biodisc. Conventional activated sludge and extended aeration had higher removal efficiencies for ammonia, TSS, COD and BOD(5) and produced good quality final effluents for final disposal in accordance with the discharge standard. Empirical equations that correlated the concentration of dissolved oxygen in the effluents with the efficiencies of TSS, ammonia, COD and BOD(5) removals for all plants evaluated were obtained. The performance of the plants using compact extended aeration was affected more than those using conventional technologies or rotary biodisc when the capacity exceeded that of its initial design.
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Affiliation(s)
- M F Colmenarejo
- Centro de Ciencias Medioambientales (CSIC), C/Serrano, 115-Duplicado, 28006 Madrid, Spain
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García MG, Busso CA, Polci P, García Girou NL, Echenique V. Water relations and leaf growth rate of three Agropyron genotypes under water stress. BIOCELL 2002; 26:309-17. [PMID: 12619563] [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: 03/01/2023]
Abstract
The effects of water stress on leaf water relations and growth are reported for three perennial tussock grass genotypes under glasshouse conditions. Studies were performed in genotypes El Palmar INTA and Selección Anguil of Agropyron scabrifolium (Döell) Parodi, and El Vizcachero of A. elongatum (Host) Beauv. Agropyron scabrifolium El Palmar INTA is native to a region with warm-temperate and humid climate without a dry season, and an average annual precipitation of 900 mm. Agropyron scabrifolium Selección Anguil comes from a region with a sub-humid, dry to semiarid climate and a mean annual precipitation of 600 mm. Agropyron elongatum is a widespread forage in semiarid Argentina with well-known water stress resistance. A mild water stress treatment was imposed slowly; plants reached a minimum pre-dawn leaf water potential of about -1.83 MPa by day 21 after watering was withheld. In all genotypes, water stress led to a reduction of leaf growth. There was a tendency for a greater epicuticular wax accumulation on water-stressed plants of A. scabrifolium Selección Anguil and A. elongatum than on those of A. scabrifolium El Palmar INTA. This may have contributed to obtain greater turgor pressures and relative water contents in the first two than in the later genotype. In turn, this may have contributed to determine smaller leaf growth rate reductions in A. scabrifolium Selección Anguil and A. elongatum than in A. scabrifolium El Palmar INTA under water stress. This study demonstrated variation in water stress resistance between genotypes in A. scabrifolium, and between A. scabrifolium Selección Anguil and A. elongatum versus A. scabrifolium El Palmar INTA, which was related to their differential responses in water relations.
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Affiliation(s)
- María G García
- Departamento de Agronomía y CERZOS (CONICET), Universidad Nacional del Sur. (8000) Bahía Blanca, Argentina
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Lopes EC, García MG, Vellón L, Alvarez E, Hajos SE. Correlation between decreased apoptosis and multidrug resistance (MDR) in murine leukemic T cell lines. Leuk Lymphoma 2001; 42:775-87. [PMID: 11697508 DOI: 10.3109/10428190109099340] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cancer cells may frequently develop cross-resistance to structurally dissimilar chemotherapeutic agents. However, the molecular mechanisms for sensitivity and resistance of tumor cells towards chemotherapy are still partially understood. Antineoplasic drugs have been shown to induce apoptosis in chemosensitive leukemias and solid tumors. In this work, cross-resistance among vincristine (VCR), doxorubicin (DOX) and other antineoplasic agents commonly used in the treatment of leukemia such as etoposide (VP-16), methotrexate (MTX), cyclophosphamide (CTX), dexamethasone (DEX), cytarabine (Ara-C) and L-asparaginase on vincristine resistant (LBR-V160), doxorubicin resistant (LBR-D160) and sensitive (LBR-) murine leukemic T cell lines, was determined. The effect of antineoplasic agents was assayed by tritiated thymidine incorporation. Our results showed that VCR exhibited cross-resistance with DOX, VP-16, DEX and MTX, while DOX demonstrated cross-resistance with VCR, VP-16 and MTX. Ara-C failed to present cross-resistance with any cell line. Apoptosis induced by the above drugs on the same cell lines was analyzed by acridine orange and ethidium bromide staining, DNA hypoploidy (flow cytometry) and oligonucleosomal fragmentation of nuclear DNA showing that therapeutic concentrations of these chemotherapeutic agents induced apoptosis in the LBR- cell line. Our results demonstrated that, except for DEX, none of the drugs presenting cross-resistance were able to induce cell death on LBR-V 160 or LBR-D 160 cell lines.
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Affiliation(s)
- E C Lopes
- Catedra de Inmunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), IDEHU-CONICET, Argentina.
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García MG, O'Connor JE, García LL, Martínez SI, Herrero E, del Castillo Agudo L. Isolation of a Candida albicans gene, tightly linked to URA3, coding for a putative transcription factor that suppresses a Saccharomyces cerevisiae aft1 mutation. Yeast 2001; 18:301-11. [PMID: 11223939 DOI: 10.1002/1097-0061(20010315)18:4<301::aid-yea672>3.0.co;2-h] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
A pathogen such as C. albicans needs an efficient mechanism of iron uptake in an iron-restricted environment such as is the human body. A ferric-reductase activity regulated by iron and copper, and analogous to that in S. cerevisiae, has been described in C. albicans. We have developed an in-plate protocol for the isolation of clones that complement an aft1 mutation in S. cerevisiae that makes cells dependent on iron for growth. After transformation of S. cerevisiae aft1 with a C. albicans library, we have selected clones that grow in conditions of iron deficiency and share an identical plasmid, pIRO1, with a 4500 bp insert containing the URA3 gene and an ORF (IRO1) responsible for the suppression of the iron dependency. IRO1 does not show homology with AFT1 or with other sequences in the databases. Northern analysis demonstrates constitutive expression of IRO1. CAI4, a C. albicans strain isolated as Deltaura3, also has a deletion of the 3' half of IRO1, and displays in YNB medium similar phenotypic characteristics to S. cerevisiae aft1 mutant strains. Therefore, we consider IRO1 as a gene of C. albicans involved in the utilization of iron. However, in extreme conditions of iron deprivation, CAI4 seems to activate alternative mechanisms of iron uptake that allow a better growth than the wild strain SC5314. Analysis of its predicted protein sequence is in agreement with a role of Iro1p as a transcription factor.
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Affiliation(s)
- M G García
- Departament de Bioquimica i Biologia Molecular, Facultat de Farmacia, Universitat de València, 46100 Burjassot, Spain
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Luis Godoy R, García MG, Benjamín Martínez R, Nelson Lobos JF. [Verruciform xanthoma. Report of a case]. Av Odontoestomatol 1989; 5:369-71. [PMID: 2700616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We review the general clinical and histological characteristics of Verruciform Xanthoma and report a case, presented in a female, 36 years-old, on the floor of mouth, an uncommon localization for this lesion. The Verruciform Xanthoma could be a reactional lesion to candida or another bacteria of oral mucosa, that need a surgical treatment.
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Tisminetzky M, Aguirre P, Frankel D, García MG, Malamud M. [Alcoholism as an adaptation-disadaptation factor in the district of La Matanza]. Acta Psiquiatr Psicol Am Lat 1986; 32:223-31. [PMID: 3591398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This paper is concerned with the use of alcohol and folkloric medicine in migratory populations. Some field-research was undertaken as a systemic approach to reality in the district of La Matanza (Buenos Aires, Argentina). Considering a previous contribution presented by the author in reference to alcoholic families (Prize 1981, Journal of Family Therapy) findings highlight that alcoholism and folkloric medicine persist and increase insomuch as the possibilities for adjustment to a new culture decrease. Thus, social segregation of migratory populations increases. Finally, an interdisciplinary psychotherapeutic model is outlined.
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