Alfonso Mate

Alfonso Mate
Universidad de Sevilla | US · Departamento de Fisiología

PhD

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59
Publications
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1,350
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January 2010 - December 2012
Universidad de Sevilla

Publications

Publications (59)
Article
Full-text available
Purpose Despite numerous reports on the beneficial effects of olive oil in the cardiovascular context, very little is known about the olive tree’s wild counterpart ( Olea europaea , L. var. sylvestris ), commonly known as acebuche (ACE) in Spain. The aim of this study was to analyse the possible beneficial effects of an extra virgin ACE oil on vasc...
Article
Para nuestro proyecto de “Canal virtual de divulgación sobre Fisiología” se ha utilizado diferentes redes sociales como son Instagram y YouTube, donde se han ido publicando diferentes contenidos sobre Fisiología. Los contenidos subidos a las redes sociales de manera periódica han sido creados por los estudiantes que cursan asignaturas en el Departa...
Article
Full-text available
Inflammation plays a crucial role in the course of eye diseases, including many vascular retinopathies. Although olive oil is known to have beneficial effects against inflammatory processes, there is no information available on the anti-inflammatory potential of the wild olive tree (namely, acebuche (ACE) for the primitive Spanish lineages). Here w...
Article
Full-text available
Other than being a physiological process, pregnancy is a condition characterized by major adaptations of maternal endocrine and metabolic homeostasis that are necessary to accommodate the fetoplacental unit. Unfortunately, all these systemic, cellular, and molecular changes in maternal physiology also make the mother and the fetus more prone to adv...
Article
Full-text available
Purpose: Increased reactive oxygen species (ROS) released by NADPH oxidase and inflammation are associated with arterial hypertension and eye diseases associated with high blood pressure, including glaucoma, retinopathies (e.g., age-related macular degeneration), and choroidopathies affecting ocular function; however, the mechanisms underlying the...
Article
Full-text available
Background Echinomycin (EKN), an inhibitor of hypoxia-inducible factor (HIF)-1 DNA-binding activity, has been implied as a possible therapeutic agent in ischemic diseases. Here, we assess EKN in hypoxia-driven responses in vitro using human primary adult retinal pigment epithelium cells (aRPE) and retinal endothelial cells (hREC), and in vivo using...
Article
Late-onset preeclampsia (LOPE) associates with reduced umbilical vein reactivity and endothelial nitric oxide synthase (eNOS) activity but increased human cationic amino acid (hCAT-1)–mediated L-arginine transport involving A2A adenosine receptor in the fetoplacental unit. This study addresses the A2B adenosine receptor (A2BAR)-mediated response to...
Article
Full-text available
Oxidative stress plays an important role in the pathogenesis of ocular diseases, including hypertensive eye diseases. The beneficial effects of olive oil on cardiovascular diseases might rely on minor constituents. Currently, very little is known about the chemical composition and/or therapeutic effects of the cultivated olive tree's counterpart, w...
Article
Full-text available
Sunitinib (Su) is a tyrosine kinase inhibitor with antiangiogenic and antineoplastic effects that is recommended therapy for renal cell carcinoma, gastrointestinal stromal tumors, and pancreatic neuroendocrine tumors. Arterial hypertension is one of the adverse effects observed in the treatment with Su. The aim of this work was to deepen our unders...
Article
Healthy lifestyle habits spanning from preconception to postpartum are considered as a major safeguard for achieving successful pregnancies and for prevention of gestational diseases. Among preconception priorities established by the World Health Organization (WHO) are healthy diet and nutrition, weight management, physical activity, planned pregna...
Conference Paper
Purpose Echinomycin (EKN), an inhibitor of hypoxia‐inducible factor (HIF)‐1 DNA‐binding activity, has been implied as a possible therapeutic agent in ischemic diseases. We assessed EKN in hypoxia‐driven responses in vitro using human primary adult retinal pigment epithelium cells (aRPE), and in vivo using the laser‐induced mouse choroidal neovascul...
Article
The role of oxidative stress in the physiopathology of human pregnancy is of particular interest. Pregnancy is well-known to increase the oxidative stress, mainly produced by a normal systemic inflammatory response, which results in high amounts of circulating reactive oxygen species (ROS) and reactive nitrogen species (RNS). Both ROS and RNS play...
Article
Pregnancy hypertensive disorders such as preeclampsia (PE) are strongly correlated with insulin resistance, a condition in which the metabolic handling of D-glucose is deficient. In addition, the impact of preeclampsia is enhanced by other insulin resistant disorders, including polycystic ovary syndrome and obesity. For this reason, there is a clea...
Article
Intercellular communication is a critical process in biological mechanisms. During pregnancy foetoplacental tissues release a heterogeneous group of extracellular vesicles (EVs) that include exosomes, microvesicles, apoptotic bodies, and syncytial nuclear aggregates. These vesicles contain a complex cargo (proteins, DNA, mRNA transcripts, microRNAs...
Article
L-carnitine (LC) exerts beneficial effects in arterial hypertension due, in part, to its antioxidant capacity. We investigated the signalling pathways involved in the effect of LC on angiotensin II (Ang II)-induced NADPH oxidase activation in NRK-52E cells. Ang II increased the generation of superoxide anion from NADPH oxidase, as well as the amoun...
Article
Adenosine is an endogenous nucleoside with pleiotropic effects in different physiological processes including circulation, renal blood flow, immune function, or glucose homeostasis. Changes in adenosine membrane transporters, adenosine receptors, and corresponding intracellular signalling network associate with development of pathologies of pregnan...
Article
Leptin is a protein involved in the regulation of food intake and in the immune and inflammatory responses, among other functions. Evidences demonstrate that obesity is directly associated with high levels of leptin, suggesting that leptin may directly link obesity with the elevated cardiovascular and renal risk associated with increased body weigh...
Article
Sunitinib (Su) is currently approved for treatment of several malignances. However, along with the benefits of disease stabilization, cardiovascular toxicities have also been increasingly recognized. The aim of this study was to analyze which mechanisms are involved in the cardiotoxicity caused by Su, as well as to explore the potential cardioprote...
Article
Preeclampsia is associated with impaired placental vasodilation and reduced endothelial nitric oxide synthase (eNOS) activity in the foetoplacental circulation. Adenosine and insulin stimulate vasodilation in endothelial cells, and this activity is mediated by adenosine receptor activation in uncomplicated pregnancies; however, this activity has ye...
Article
Although clays are wildly used in a range of applications, the toxicity assessment of these new materials is still scarce. In the present study, oxidative stress induced by Clay 1, a novel clay, was determined in rats after 90 d of oral exposure. The activities of antioxidant enzymes, namely, superoxide dismutase (SOD), catalase (CAT), glutathione...
Article
Full-text available
Impaired L-carnitine uptake correlates with higher blood pressure in adult men, and L-carnitine restores endothelial function in aortic rings from spontaneously hypertensive rat (SHR). Thus, endothelial dysfunction in hypertension could result from lower L-carnitine transport in this cell type. L-Carnitine transport is mainly mediated by novel orga...
Article
The development of renal fibrosis is a consequence of arterial hypertension. L-carnitine plays an essential role in the β-oxidation of fatty acids, and we have previously demonstrated hypotensive, antioxidant, and anti-inflammatory effects of L-carnitine in arterial hypertension. This work aims to analyze the effect of L-carnitine on renal fibrosis...
Article
Cardiac fibrosis is a pathogenic factor in a variety of cardiovascular diseases and is characterized by an abnormal accumulation of extracellular matrix protein that leads to cardiac dysfunction. L-carnitine (LC) plays an essential role in the β-oxidation of long-chain fatty acids in lipid metabolism. We have previously demonstrated the beneficial...
Article
Full-text available
Purpose: Arterial hypertension is associated with a high production of reactive oxygen species and a decrease in the antioxidant defense systems. Based on the lack of toxicity of L-carnitine (LC) and previous studies reporting beneficial effects of this compound in experimental models of hypertension, the aim of this work was to test the hypothesi...
Article
Highlights ► Drug discovery in the field of preeclampsia is particularly sensitive. ► The pathophysiology of preeclampsia remains unknown. ► The discovery of possible common effector pathways is crucial ► Adenosine–l-arginine–nitric oxide pathway may be a preferential target ► l-Carnitine may have a relevant role in preeclampsia prevention. Pregnan...
Chapter
Full-text available
Preeclampsia is a syndrome that affects a significant proportion of pregnant women worldwide. The several hypotheses proposed regarding the aetiology of preeclampsia highlight the possibility of a critical role played by the placenta and the multiple molecules released by this organ in the onset of the syndrome. Recent reports suggest that not only...
Article
In spite of a wide range of drugs being available in the market, treatment of arterial hypertension still remains a challenge, and new therapeutic strategies could be developed in order to improve the rate of success in controlling this disease. Since oxidative stress has gained importance in the last few years as one of the mechanisms involved in...
Article
Full-text available
Captopril is an angiotensin-converting enzyme (ACE) inhibitor widely used in the treatment of arterial hypertension and cardiovascular diseases. Our objective was to study whether captopril is able to attenuate the cardiac inflammatory process associated with arterial hypertension. Left ventricle mRNA expression and plasma levels of pro-inflammator...
Article
It has been shown that oxidative stress is involved in the pathogenesis of arterial hypertension. The aim of this work was to study and compare the molecular mechanisms of the antioxidant properties of l-carnitine and captopril in spontaneously hypertensive rats (SHR). Antioxidant enzyme activity/regulation (glutathione peroxidase, glutathione redu...
Article
Subclinical organ damage is a very important aspect when assessing total cardiovascular risk in hypertensive subjects. Therapeutic strategies in those patients should consider treatment of hypertension-related cardiovascular and renal damage in addition to achieving the recommended blood pressure targets. l-carnitine (LC) is a naturally occurring c...
Article
La Facultad de Farmacia de la Universidad de Sevilla (US) tiene en marcha un Programa de Alumnos Tutores desde 2006/07 con el objetivo de que alumnos de cursos superiores (AATT) tutelen a alumnos de nuevo ingreso (1x3). Pretende generar una actitud responsable en los AATT y favorecerles el desarrollo de habilidades sociales, objetivos cualitativos...
Article
El objetivo principal de este trabajo es fomentar el autoaprendizaje y la relación profesor-alumno. Esto lo conseguiremos promoviendo el seguimiento continuado del alumno mediante tutorías presenciales y virtuales, y la evaluación de varios temas del programa seleccionados por el profesor para ser abordados por los alumnos. La materia elegida, Hema...
Article
The main aim of this project is to stimulate the creation of self-learning material and to improve the relationship between teachers and students. This will be achieved through the construction of a lesson of the theoretical program, by the student him- or herself. Part of the Pharmacy Degree course, Haematology, was the chosen subject. This work h...
Article
The mechanism(s) underlying the effects of L-carnitine (beta-hydroxy-gamma-N-trimethylammonium-butyrate; LC) in cardiovascular diseases are not well clarified. Previous studies have demonstrated that oxidative stress and inflammation contribute to arterial hypertension, and antioxidant and/or anti-inflammatory therapies have been proposed. We hypot...
Article
The present study aimed to investigate whether l-carnitine (LC) protects the vascular endothelium and tissues against oxidative damage in hypertension. Antioxidant enzyme activities, glutathione and lipid peroxidation were measured in the liver and heart of spontaneously hypertensive rats (SHR) and Wistar-Kyoto (WKY) rats. Nitrite and nitrate level...
Article
Full-text available
Experimental models of hypertension, such as spontaneously hypertensive rats (SHR), show alterations in cellular sodium transport that affects Na(+)-coupled cotransport processes and has been involved in the pathogenesis of this disease. The objective of the present study was to analyze the kinetic properties of the sodium-dependent glucose transpo...
Article
Oxidative stress plays an important role in arterial hypertension and propionyl-L-carnitine (PLC) has been found to protect cells from toxic reactive oxygen species. In this work, we have evaluated the antioxidant capacity of chronic PLC treatment in spontaneously hypertensive rats (SHR) by measuring the activity of antioxidant enzymes and the lipi...
Article
Full-text available
Hepatocytes and cholangiocytes release ATP into bile, where it is rapidly degraded into adenosine and P(i). In rat, biliary P(i) concentration (0.01 mM) is approximately 100-fold and 200-fold lower than in hepatocytes and plasma, respectively, indicating active reabsorption of biliary P(i). We aimed to functionally characterize canalicular P(i) rea...
Article
IntroducciónEl trabajo trata de evaluar la acción antioxidante de la propionil-L-carnitina (PLC) en el hígado y corazón de ratas hipertensas (spontaneusly hypertensive rats [SHR]) y normotensas (Wistar-Kyoto [WKY]). Además, estudiamos su acción hipolipidemiante.Material y métodosRatas WKY y SHR de 4 semanas se tartan con PLC (200 mg/kg de peso corp...
Article
The effect of acute exposure of intraperitoneal injection of microcystin-LR (MCLR) on antioxidant enzymes and lipid peroxidation has been studied in liver and kidney of rats. Rats were treated with two doses, i.e. 100 and 150 microg of pure MCLR/kg body weight or saline solution. The enzyme activities of glutathione peroxidase (GSH-Px), glutathione...
Article
Abnormalities in carbohydrate metabolism and the insulin resistance status have been associated with hypertension. We have previously described alterations in the sodium-coupled sugar absorption in an experimental model of hypertension; in the present work, we studied the regulation of the sodium-independent, GLUT5-facilitated D-fructose intestinal...
Article
Full-text available
The objective of the present study was to evaluate the effects of microcystin-LR (MCLR) on the activity of membrane enzymes from intestinal mucosa. In addition, serum chemistry and peroxidative status of both serum and intestinal homogenate were evaluated after treatment with MCLR. Wistar rats were treated with intraperitoneal injection of either 1...
Article
D-glucose absorption, distinguishing between active and diffusive components, was studied in the ileum of spontaneously hypertensive rats (SHR) and their normotensive control Wistar-Kyoto (WKY) rats. Net water transport was also determined. A perfusion system in vivo with ileum loops was used, and experiments with phlorizin, phloretin and 2,4,6-tri...
Article
To examine the effect of long-term administration of L-carnitine on L-carnitine transport in renal brush-border membrane vesicles (BBMVs) from normotensive, Wistar-Kyoto rats. Rats (n = 20) were orally administered 0.2 g carnitine/kg body weight per day for a total period of 8 weeks. Kinetic parameters of L-carnitine uptake were calculated by non-l...
Article
D-fructose transport was characterized in renal brush-border membrane vesicles (BBMVs) from both spontaneously hypertensive rats (SHR) and normotensive genetic control Wistar-Kyoto (WKY) rats. Kinetic studies indicated that the maximal rate (Vmax) of D-fructose transport was significantly lower in SHR compared with WKY rats. No differences were obs...
Article
The lipid composition and fluidity in brush-border membrane vesicles (BBMV) isolated from renal cortex of spontaneously hypertensive rats (SHR) and their normotensive control, Wistar Kyoto (WKY) rats have been studied. The activity of Na+-dependent D-glucose transport has been also determined. A significant increase in total phospholipids and free...
Article
Na+-dependent D-glucose and D-galactose transport was studied in the ileal brush-border membrane vesicles from both spontaneously hypertensive rats (SHR) and their normotensive genetic control Wistar-Kyoto (WKY) rats. Initial rates and accumulation ratios of the transport of both monosaccharides were significantly lower in the hypertensive rats com...
Article
Ultrastructural studies on the epithelium, sugar transport and immunocytochemistry of Na+-glucose cotransporter (SGLT1) were carried out in the jejunum of Spontaneously Hypertensive Rats (SHR) and their normotensive genetic control, Wistar-Kyoto (WKY) rats. Electron microscopy studies showed a regular brush-border membrane in the jejunal enterocyte...
Article
Na(+)-dependent D-glucose and D-galactose transport were studied in brush-border membrane vesicles (BBMVs) from kidney cortex isolated from both spontaneously hypertensive rats (SHR) and their normotensive genetic control Wistar-Kyoto (WKY) rats. Initial rates and accumulation ratios of Na(+)-dependent D-glucose and D-galactose transport were signi...
Article
Full-text available
En: Revista de Enseñanza Universitaria Sevilla 2001, n. 18 ; p. 33-45 El presente proyecto ha tenido por objeto el diseño y la elaboración de un módulo práctico de aprendizaje que permita a estudiantes de Toxicologa de la Universidad de Sevilla, tanto presenciales como virtuales y a toxicólogos establecidos, el acceso a diferentes tipos de fuentes...

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