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Santa Fe de Mondújar, Spain

Allepuz A.,Autonomous University of Barcelona | Casal J.,Autonomous University of Barcelona | Napp S.,Autonomous University of Barcelona | Saez M.,University of Girona | And 13 more authors.
Preventive Veterinary Medicine | Year: 2011

In this study we explored the spatial variation of Bovine tuberculosis (BTB) risk of being positive, new positive or persistently positive, as well as the risk of eliminating BTB in positive herds throughout Spain from 2006 to 2009 by means of hierarchical Bayesian models. The results of the models showed that the risk of infection (positive or new positive herds), persistence and elimination was lower in counties located in north and north-eastern of Spain, and in the Balearic and Canary islands than in the rest of the country. In some counties the risk of positivity was high during the four years of study, whereas there were others where the risk of positivity was high only in some of the years. With regard to the risk of persistence of BTB positive herds, counties located in the central, western and south-western part of the country had a higher risk in the three studied periods. This study has identified some specific areas of increased BTB risk in Spain, information that is useful for disease management. © 2011 Elsevier B.V. Source

Del Pilar Carrera M.,University of Jaen | Ramirez-Exposito M.J.,University of Jaen | Mayas M.D.,Fundacion Imabis | Garcia M.J.,Laboratorio Central Of Sanidad Animal | Martinez-Martos J.M.,University of Jaen
Tumor Biology | Year: 2010

Angiotensin II in particular and/or the local renin-angiotensin system in general could have an important role in epithelial tissue growth and modelling; therefore, it is possible that it may be involved in breast cancer. In this sense, previous works of our group showed a predominating role of angiotensin II in tumoral tissue obtained from women with breast cancer. However, although classically angiotensin II has been considered the main effector peptide of the renin-angiotensin system cascade, several of its catabolism products such as angiotensin III and angiotensin IV also possess biological functions. These peptides are formed through the activity of several proteolytic regulatory enzymes of the aminopeptidase type, also called angiotensinases. The aim of this work was to analyse several specific angiotensinase activities involved in the renin-angiotensin system cascade in mammary tissue from control rats and from rats with mammary tumours induced by N-methyl-nitrosourea (NMU), which may reflect the functional status of their target peptides under the specific conditions brought about by the tumoural process. The results show that soluble and membrane-bound specific aspartyl aminopeptidase activities and membrane-bound glutamyl aminopeptidase activity increased in mammary tissue from NMU-treated animals and soluble aminopeptidase N and aminopeptidase B activities significantly decreased in mammary tissue from NMU-treated rats. These changes support the existence of a local mammary renin-angiotensin system and that this system and its putative functions in breast tissue could be altered by the tumour process, in which we suggest a predominant role of angiotensin III. All described data about the renin-angiotensin system in mammary tissue support the idea that it must be involved in normal breast tissue functions, and its disruption could be involved in one or more steps of the carcinogenesis process. © 2010 International Society of Oncology and BioMarkers (ISOBM). Source

Carrera-Gonzalez M.P.,University of Jaen | Ramirez-Exposito M.J.,University of Jaen | Mayas M.D.,University of Jaen | Garcia M.J.,Laboratorio Central Of Sanidad Animal | Martinez-Martos J.M.,University of Jaen
Life Sciences | Year: 2013

An association between breast cancer and thyroid dysfunction exists although the underlying mechanisms remain to be elucidated. Numerous studies have characterized the role of thyroid hormones in controlling the synthesis and secretion of renin-angiotensin system (RAS) components, but little information is available on the putative role of the local RAS on thyroid function. Aims: Here we analyze several soluble and membrane-bound RAS-regulating aminopeptidase activities in thyroid gland from rats with mammary tumors and the relationship with the circulating levels of thyroid stimulating hormone (TSH) and free thyroxin (fT4). Main methods: We analyze soluble and membrane-bound RAS-regulating aminopeptidase activities fluorometrically using their corresponding aminoacyl-β-naphthylamide as the substrate. Key findings We have found in rats with mammary tumors a concomitant change of thyroid RAS-regulating enzymes and thyroid hormone production. Significance: We suggest that existence of alterations in the regulatory mechanisms mediated by the angiotensins of the local tissue RAS as a consequence of the carcinogenic process which could act alone or in combination with alterations at a higher level of regulation such as the hypothalamus-pituitary axis. © 2013 Elsevier Inc. All rights reserved. Source

Ruiz-Sanjuan M.D.,University of Jaen | Martinez-Martos J.M.,University of Jaen | Carrera-Gonzalez M.P.,University of Jaen | Mayas M.D.,University of Jaen | And 3 more authors.
Integrative Cancer Therapies | Year: 2015

Hypothesis. Renin-angiotensin system (RAS) has been considered not only as a regulator of systemic volume and electrolyte balance but also has been recently involved in various pathological processes such as cancer. In the etiology of breast cancer, dietary factors have been analyzed and especially the influence of dietary fat has been studied, but the underlying mechanisms remain unclear. In this study, we analyzed RAS-regulating enzymes in serum of rats with N-methyl nitrosourea (NMU)-induced breast cancer fed with different diets. Study Design. Four groups of rats were injected intraperitoneally with 3 doses of 50 mg/kg body weight of NMU at different days after birth and were fed with an AIN-93 commercial diet or AIN-93 diets with 4% fat constituted respectively by extra virgin olive oil, refined sunflower oil, and refined sunflower oil enriched to 50% with oleic acid. Method. After sacrifice, blood and tumor samples were collected by spectrophotometric determinations of RAS-regulating enzymes in plasma and histopathology studies. Results. We show that the type of dietary fat does not influence latency period, incidence of animals with tumors, incidence of mortality, or tumor yield per rat. However, changes were observed in tumor volume and the histopathology. The type of dietary fat also differently modified the enzymes involved in RAS regulation. Conclusions. It might suggest that one of the mechanisms by which dietary fat affects breast cancer is the modification of the RAS system, which may be consider as a new target for integrative therapies. © The Author(s) 2014. Source

Manzano E.,University of Granada | Rodriguez-Simon L.R.,University of Granada | Navas N.,University of Granada | Checa-Moreno R.,Laboratorio Central Of Sanidad Animal | And 2 more authors.
Talanta | Year: 2011

The correct identification of drying oils plays an essential role in providing an understanding of the conservation and deterioration of artistic materials in works of art. To this end, this work proposes the use of peak area ratios from fatty acids after ensuring that the linear responses of the detector are tested. A GC-MS method, previously reported in the literature, was revisited to its developed and validated in order to identify and quantify of eight fatty acids that are widely used as markers for drying oils in paintings, namely myristic acid (C14:0), palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), suberic acid (2C8), azelaic acid, (2C 9) and sebacic acid (2C10). The quaternary ammonium reagent m-(trifluoromethyl)phenyltrimethylammonium hydroxide (TMTFAH) was used for derivatization prior to GC-MS analysis of the oils. MS spectra were obtained for each methyl ester derivative of the fatty acids and the characteristic fragments were identified. The method was validated in terms of calibration functions, detection and quantification limits and reproducibility using the signal recorded in SIR mode, since two of the methyl derivatives were not totally separated in the chromatographic run. The proposed method was successfully applied to identify and characterise the most widely used drying oils (linseed oil, poppy seed oil and walnut oil) in the painting La Encarnación. This 17th century easel painting is located in the main chapel of the cathedral in Granada (Spain) and was painted by the well-known artist of the Spanish Golden Age, Alonso Cano (1601-1667). © 2011 Elsevier B.V. All rights reserved. Source

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