22 research outputs found

    Expresión del receptor de potencial transitorio tipo 1 (TRPV-1) en placenta humana normal y preeclámptica

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    La preeclampsia (PE) es un síndrome multisistémico caracterizado por una anormal placentación. Aunque su etiología se desconoce, existen numerosos trabajos que demuestran que esta patología se asocia con la reducción o el anormal funcionamiento de una variedad de proteínas transportadoras. El receptor de potencial transitorio tipo 1 (TRPV-1) es un canal catiónico no selectivo que puede ser activado por múltiples estímulos. Recientemente fue descripto en citotrofoblasto de placenta a término, demostrando su rol como regulador de la apoptosis placentaria. Dada su preferencia por los iones calcio, TRPV-1 puede ser relevante en el proceso de captación de este catión por el sincitiotrofoblasto y participar en el proceso de sincialización. El objetivo del presente estudio fue investigar la expresión y localización de TRPV-1 en vellosidades de primer trimestre, así como determinar su expresión en placentas preeclámpticas.Facultad de Ciencias Médica

    Expresión del receptor de potencial transitorio tipo 1 (TRPV-1) en placenta humana normal y preeclámptica

    Get PDF
    La preeclampsia (PE) es un síndrome multisistémico caracterizado por una anormal placentación. Aunque su etiología se desconoce, existen numerosos trabajos que demuestran que esta patología se asocia con la reducción o el anormal funcionamiento de una variedad de proteínas transportadoras. El receptor de potencial transitorio tipo 1 (TRPV-1) es un canal catiónico no selectivo que puede ser activado por múltiples estímulos. Recientemente fue descripto en citotrofoblasto de placenta a término, demostrando su rol como regulador de la apoptosis placentaria. Dada su preferencia por los iones calcio, TRPV-1 puede ser relevante en el proceso de captación de este catión por el sincitiotrofoblasto y participar en el proceso de sincialización. El objetivo del presente estudio fue investigar la expresión y localización de TRPV-1 en vellosidades de primer trimestre, así como determinar su expresión en placentas preeclámpticas.Facultad de Ciencias Médica

    In Vitro and In Vivo Efficacy of Ether Lipid Edelfosine against Leishmania spp. and SbV-Resistant Parasites

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    Leishmaniasis represents a major international health problem, has a high morbidity and mortality rate, and is classified as an emerging and uncontrolled disease by the World Health Organization. The migration of population from endemic to nonendemic areas, and tourist activities in endemic regions are spreading the disease to new areas. Unfortunately, treatment of leishmaniasis is far from satisfactory, with only a few drugs available that show significant side-effects. Here, we show in vitro and in vivo evidence for the antileishmanial activity of the ether phospholipid edelfosine, being effective against a wide number of Leishmania spp. causing cutaneous, mucocutaneous and visceral leishmaniasis. Our experimental mouse and hamster models demonstrated not only a significant antileishmanial activity of edelfosine oral administration against different wild-type Leishmania spp., but also against parasites resistant to pentavalent antimonials, which constitute the first line of treatment worldwide. In addition, edelfosine exerted a higher antileishmanial activity and a lower proneness to generate drug resistance than miltefosine, the first drug against leishmaniasis that can be administered orally. These data, together with our previous findings, showing an anti-inflammatory action and a very low toxicity profile, suggest that edelfosine is a promising orally administered drug for leishmaniasis, thus warranting clinical evaluation

    Implantación de un sistema de organización, planificación y desarrollo de la asignatura de Prácticas Tuteladas (PT) en la titulación de Graduado/a en Farmacia

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    Memoria ID-161. Ayudas de la Universidad de Salamanca para la innovación docente, curso 2010-2011.Con la implantación de la aplicación informática para la que se solicitó subvención, se pretende agilizar todos estos procesos, y al mismo tiempo coordinar de una forma más eficaz a todos los estamentos participantes en la organización, planificación y desarrollo de la asignatura de PT: estudiantes, centros receptores, tutores y profesorado asociado responsable de la docencia. Todo ello bajo la supervisión de la Facultad de Farmacia

    Diseño de una web para el posgrado Farmacia y Salud y potenciación del uso del campus virtual Studium como apoyo a la docencia del Máster de gestión y producción en la industria farmacéutica

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    Memoria ID-0090. Ayudas de la Universidad de Salamanca para la innovación docente, curso 2008-2009.En la petición de este proyecto se plantearon sendas actividades formativas en el manejo de la herramienta MOODLE, que por razones de organización y por haber conseguido con posterioridad otras ayudas de movilidad y de planes de mejora del Master, se han pospuesto en su programación y se van a desarrollar en la Facultad de Farmacia en la primera quincena de julio, en unas jornadas más amplias en las que se acometerán además del taller sobre STUDIUM, otras actividades

    The alkylphospholipid edelfosine shows activity against Strongyloides venezuelensis and induces apoptosis-like cell death

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    Strongyloidiasis is widely distributed in the tropical and subtropical areas. Ivermectin is the drug of choice for the treatment. However, the concerns about relying treatment on a single drug make identification of new molecules a priority. Alkylphospholipid analogues, including edelfosine, are a group of synthetic compounds that have shown activity against some parasites. The objective was to assess the in vitro and in vivo activity of edelfosine, miltefosine, perifosine against Strongyloides venezuelensis. Moreover, apoptosis-like mechanism in larvae after treatment was studied. Edelfosine displayed the highest activity and the best selectivity index (LD50 = 49.6 ± 5.4 µM, SI = 1.1) compared to miltefosine or perifosine. Third stage larvae after culture with edelfosine were not able to develop an infection in mice. Treatment of mice with edelfosine showed reduction of 47% in parasitic females allocated in the gut. Moreover, DNA fragmentation was observed by TUNEL staining in larvae treated with edelfosine. These results suggest that edelfosine could be an effective drug against strongyloidiasis, probably through induction of apoptosis-like cell death. © 2016 Elsevier [email protected]

    In Vitro and In Vivo Efficacy of Ether Lipid Edelfosine against Leischmania spp. and SbV-Resistant Parasites

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    BACKGROUND: The leishmaniases are a complex of neglected tropical diseases caused by more than 20 Leishmania parasite species, for which available therapeutic arsenal is scarce and unsatisfactory. Pentavalent antimonials (SbV) are currently the first-line pharmacologic therapy for leishmaniasis worldwide, but resistance to these compounds is increasingly reported. Alkyl-lysophospoholipid analogs (ALPs) constitute a family of compounds with antileishmanial activity, and one of its members, miltefosine, has been approved as the first oral treatment for visceral and cutaneous leishmaniasis. However, its clinical use can be challenged by less impressive efficiency in patients infected with some Leishmania species, including L. braziliensis and L. mexicana, and by proneness to develop drug resistance in vitro. METHODOLOGY/PRINCIPAL FINDINGS: We found that ALPs ranked edelfosine>perifosine>miltefosine>erucylphosphocholine for their antileishmanial activity and capacity to promote apoptosis-like parasitic cell death in promastigote and amastigote forms of distinct Leishmania spp., as assessed by proliferation and flow cytometry assays. Effective antileishmanial ALP concentrations were dependent on both the parasite species and their development stage. Edelfosine accumulated in and killed intracellular Leishmania parasites within macrophages. In vivo antileishmanial activity was demonstrated following oral treatment with edelfosine of mice and hamsters infected with L. major, L. panamensis or L. braziliensis, without any significant side-effect. Edelfosine also killed SbV-resistant Leishmania parasites in in vitro and in vivo assays, and required longer incubation times than miltefosine to generate drug resistance. CONCLUSIONS/SIGNIFICANCE: Our data reveal that edelfosine is the most potent ALP in killing different Leishmania spp., and it is less prone to lead to drug resistance development than miltefosine. Edelfosine is effective in killing Leishmania in culture and within macrophages, as well as in animal models infected with different Leishmania spp. and SbV-resistant parasites. Our results indicate that edelfosine is a promising orally administered antileishmanial drug for clinical evaluation

    Trypanocidal Activity of Long Chain Diamines and Aminoalcohols

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    Thirteen aminoalcohols and eight diamines were obtained and tested against Trypanosoma cruzi epimastigotes strains MG, JEM and CL-B5 clone. Some of them were equal or more potent (1.0–6.6 times) than the reference compound nifurtimox. From them, three aminoalcohols and two diamines were selected for amastigotes assays. Compound 5 was as potent as the reference drug nifurtimox against amastigotes of the CL-B5 strain (IC50 = 0.6 µM), with a selectivity index of 54
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