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Hospital de Órbigo, Spain

Baldan-Martin M.,Hospital Nacional de Paraplejicos HNP | Mourino-Alvarez L.,Hospital Nacional de Paraplejicos HNP | Gonzalez-Calero L.,IIS Fundacion JimenezDiaz | Moreno-Luna R.,Hospital Nacional de Paraplejicos HNP | And 10 more authors.
Hypertension | Year: 2016

Albuminuria is a risk factor strongly associated with cardiovascular disease, the first cause of death in the general population. It is well established that renin-angiotensin system suppressors prevent the development of new-onset albuminuria in naïf hypertensive patients and diminish its excretion, but we cannot forget the percentage of hypertensive patients who develop de novo albuminuria. Here, we applied multiple proteomic strategy with the purpose to elucidate specific molecular pathways involved in the pathogenesis and provide predictors and chronic organ damage indicators. Briefly, 1143 patients were followed up for a minimum period of 3 years. One hundred and twenty-nine hypertensive patients chronically renin-angiotensin system suppressed were recruited, classified in 3 different groups depending on their albuminuria levels (normoalbuminuria, de novo albuminuria, and sustained albuminuria), and investigated by multiple proteomic strategies. Our strategy allowed us to perform one of the deepest plasma proteomic analysis to date, which has shown 2 proteomic signatures: (1) with predictive value of de novo albuminuria and (2) sustained albuminuria indicator proteins. These proteins are involved in inflammation, immune as well as in the proteasome activation occurring in situations of endoplasmic reticulum stress. Furthermore, these results open the possibility of a future strategy based on anti-immune therapy to treat hypertension which could help to prevent the development of albuminuria and, hence, the progression of kidney damage. © 2016 American Heart Association, Inc. Source

De La Cuesta F.,Laboratorio Of Fisiopatologia Vascular | Alvarez-Llamas G.,Institute Investigacion Sanitaria Fundacion Jimenez Diaz IIS FJD | Gil-Dones F.,Hospital Nacional de Paraplejicos | Darde V.M.,Proteomic Unit | And 5 more authors.
Methods in Molecular Biology | Year: 2013

One of the major challenges in cardiovascular medicine is to identify candidate biomarker proteins. Between different proteomics studies, the secretome is a valuable tool in the search for biomarkers locally released by a studied tissue and remains particularly important while working with vascular tissues, since the secreted proteins would be probably shed to the blood. In this chapter, we described a method to validate the origin of secreted proteins in human aortic valves, demonstrating their synthesis and release by the tissue and ruling out blood origin. © Springer Science+Business Media New York 2013. Source

Alvarez-Llamas G.,IIS Fundacion Jimenez Diaz | Martin-Rojas T.,Hospital Nacional de Paraplejicos HNP | De La Cuesta F.,Hospital Nacional de Paraplejicos HNP | Gil-Dones F.,Hospital Nacional de Paraplejicos HNP | And 7 more authors.
Molecular and Cellular Proteomics | Year: 2013

One of the major challenges in cardiovascular medicine is to identify candidate biomarker proteins. Secretome analysis is particularly relevant in this search as it focuses on a subset of proteins released by a cell or tissue under certain conditions. The sample can be considered as a plasma subproteome and it provides a more direct approximation to the in vivo situation. Degenerative aortic stenosis is the most common worldwide cause of valve replacement. Using a proteomic analysis of the secretome from aortic stenosis valves we could identify candidate markers related to this pathology, which may facilitate early diagnosis and treatment. For this purpose, we have designed a method to validate the origin of secreted proteins, demonstrating their synthesis and release by the tissue and ruling out blood origin. The nLC-MS/MS analysis showed the labeling of 61 proteins, 82% of which incorporated the label in only one group. Western blot and selective reaction monitoring differential analysis, revealed a notable role of the extracellular matrix. Variation in particular proteins such as PEDF, cystatin and clusterin emphasizes the link between aortic stenosis and atherosclerosis. In particular, certain proteins variation in secretome levels correlates well, not only with label incorporation trend (only labeled in aortic stenosis group) but, more importantly, with alterations found in plasma from an independent cohort of samples, pointing to specific candidate markers to follow up in diagnosis, prognosis, and therapeutic intervention. © 2013 by The American Society for Biochemistry and Molecular Biology, Inc. Source

Gil F.,INIA | Gil F.,Laboratorio Of Fisiopatologia Vascular | Perez-Filgueira M.,INIA | Perez-Filgueira M.,CONICET | And 7 more authors.
Virus Research | Year: 2011

Recombinant subunit and peptidic vaccines in general present a reduced immunogenicity in vaccinated individuals with respect to the whole pathogen from which they derived. The generation of strong immune responses to these vaccines requires the use of potent adjuvants, high antigen doses and repetitive vaccinations. In this report, we document the enhanced antibody response obtained against two recombinant subunit vaccines by means of targeting to antigen-presenting cells by a recombinant single chain antibody. This antibody, named APCH1, recognizes an epitope of MHC Class II DR molecule preserved in different animal species, including humans. We showed that vaccinal antigens translationally fused to APCH1 antibody and produced by recombinant baculoviruses in insect larvae (Trichoplusia ni), elicited an increased antibody response in comparison with the same antigens alone or fused to a carrier molecule. These results suggest that targeting of antigens to this invariant MHC Class II epitope has immunopotentiating effects that could circumvent the reduced potency of peptidic or subunit vaccines, opening the possibility of widespread application of APCH1 as a new adjuvant antibody of general use. © 2010 Elsevier B.V. Source

de la Cuesta F.,Laboratorio Of Fisiopatologia Vascular | Baldan-Martin M.,Laboratorio Of Fisiopatologia Vascular | Mourino-Alvarez L.,Laboratorio Of Fisiopatologia Vascular | Sastre-Oliva T.,Laboratorio Of Fisiopatologia Vascular | And 6 more authors.
Hipertension y Riesgo Vascular | Year: 2016

Introduction: Extracellular vesicles (EVs) are released to the bloodstream by certain cell types due to transport, activation and cell death processes. Blood count of EVs from platelet and endothelial origin has been proved to be a cardiovascular risk biomarker. Thus, EVs proteome might reflect the underlying cellular processes in hypertensive patients with albuminuria. Material and methods: Protein content of circulating EVs was analyzed by liquid chromatography coupled to mass spectrometry. EVs were isolated by an ultracentrifugation protocol optimized in order to avoid contamination by blood plasma proteins. Purity of the isolated fraction was verified by electronic and confocal microscopy, and by flow cytometry. Results: We hereby show a method to isolate circulating EVs from hypertensive patients with/without albuminuria with high yield and purity. Besides, we provide a reference proteome of the EVs of these patients, composed of 2,463 proteins, and prove that the proteins carried by these vesicles are associated with crucial processes involved in the inherent cardiovascular risk. Conclusion: The proteome of circulating EVs is an interesting source of indicators in the evaluation of cardiovascular risk in hypertensive patients with renin-angiotensin system blockage. © 2015 SEHLELHA. Source

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