Diseño de herramientas informáticas para la mejora en las prácticas de laboratorio de la asignatura de fisicoquímica farmacéutica

Desarrollo de herramientas informáticas que faciliten el análisis y la comprensión de las prácticas de laboratorio de diagrama de fases ternario y volumen molar parcial, lo que implica una mejora en el aprendizaje de la asignatura

Diseño de metodologías online para asistir en la docencia de las prácticas de laboratorio de la asignatura de Física Aplicada a Farmacia

Objetivos propuestos en la presentación del proyecto: En este proyecto planteamos la realización de forma análoga de vídeos de las prácticas de la Asignatura de primero de Física Aplicada a Farmacia. De la experiencia del proyecto anterior (361) consideramos necesario implementar dos nuevos objetivos: 1. Adaptación de los materiales creados para la enseñanza en el sistema híbrido de docencia presencial-virtual 2. Ampliación de los contenidos que permitan la evaluación de las competencias adquiridas, así como para autoevaluación de los/as estudiantes. Además, seguiremos adaptando los contenidos a la plataforma nueva de Microsoft Teams y Google Meets y ayudando a la formación del profesorado universitario en competencias digitales, la innovación en recursos educativos en abierto y enseñanza virtual, el proceso de evaluación de la actividad docente e implementando la inserción laboral y el emprendimiento entre los estudiantes, así como, el fomento de una universidad inclusiva, accesible, diversa y enfocada a los objetivos de la Agenda 2030 para el desarrollo sostenible.Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaFALSEUniversidad Complutense de Madridsubmitte

Diseño de metodologías online para asistir en la docencia de las prácticas de laboratorio de la asignatura de Físico Química Farmacéutica

El proyecto de innovación docente realizó un diseño de metodologías online para asistir en la docencia de las prácticas de laboratorio de la asignatura de Físico Química Farmacéutica. Esta asignatura es obligatoria de segundo año del grado en Farmacia

Chitosan Spray-Dried Microparticles for Controlled Delivery of Venlafaxine Hydrochloride

Venlafaxine controlled drug delivery systems using different matrixes have been tested to reduce undesirable side effects in the treatment of depression. The legal status of chitosan (Cs) in Pharmacy has dramatically improved after its acceptance as excipient in several Pharmacopeias and, therefore, there is great interest in pharmaceutical formulations based on this polymer. In this paper, chitosan microcapsules cross-linked with sodium tripolyphosphate (TPP) for oral delivery of venlafaxine were formulated using the spray drying technique. The effect of chitosan physico-chemical properties, TPP concentration and TPP/Cs ratio on drug release was evaluated. The microcapsules were characterized in terms of size, zeta potential and morphology. The physical state of the drug was determined by X-ray diffraction (XRD) and the drug release from the microcapsules was studied in simulated gastric and intestinal fluids. The release pattern fitted well to the Peppas-Koersmeyer model with n exponents indicating anomalous transport

Efficient reduction of Toluidine Blue O dye using silver nanoparticles synthesized by low molecular weight chitosans

The aim of this paper is to study the catalytic behaviour of silver nanoparticles (AgNps) produced using low molecular weight chitosan (LMWC) samples depolymerized by an enzymatic method, using either lysozyme or chitosanase. The ability of four sets of silver nanoparticles to reduce Toluidine Blue (TBO) was used as test reaction, and the effect of both catalyst concentration and reaction temperature on the effectiveness of the catalytic reduction was assessed. Generally speaking, AgNps produced through chitosan depolymerization with lysozyme showed better performance than those ones produced using chitosanase. On the other hand, colloidal silver nanoparticles stabilized with LMWC were mixed with medium molecular weight chitosan (MMWC) sample, in order to generate different scaffolds by using beta-glycerol phosphate. These scaffolds were analyzed by microscopy, XRD, ATR-FTIR, and their swelling capacity was evaluated. Their catalytic ability for reducing TBO, as well as their reusability, was assessed. Our results showed that the catalytic properties of the colloidal AgNps were remarkably affected by the properties of the LMWC used for their synthesis. Once again, AgNps-chitosan scaffolds produced with chitosan depolymerized with lysozyme were more effective.Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu

Influence of Preparation Methods of Chitooligosaccharides on Their Physicochemical Properties and Their Anti-Inflammatory Effects in Mice and in RAW264.7 Macrophages

The methods to obtain chitooligosaccharides are tightly related to the physicochemical properties of the end products. Knowledge of these physicochemical characteristics is crucial to describing the biological functions of chitooligosaccharides. Chitooligosaccharides were prepared either in a single-step enzymatic hydrolysis using chitosanase, or in a two-step chemical-enzymatic hydrolysis. The hydrolyzed products obtained in the single-step preparation were composed mainly of 42% fully deacetylated oligomers plus 54% monoacetylated oligomers, and they attenuated the inflammation in lipopolysaccharide-induced mice and in RAW264.7 macrophages. However, chitooligosaccharides from the two-step preparation were composed of 50% fully deacetylated oligomers plus 27% monoacetylated oligomers and, conversely, they promoted the inflammatory response in both in vivo and in vitro models. Similar proportions of monoacetylated and deacetylated oligomers is necessary for the mixtures of chitooligosaccharides to achieve anti-inflammatory effects, and it directly depends on the preparation method to which chitosan was submitted.Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu

Evaluating Non-Conventional Chitosan Sources for Controlled Release of Risperidone

In this work, two chitosan samples from cuttlebone and squid pen are produced and characterized. We studied the formation of thermoresponsive hydrogels with β-glycerol phosphate and found proper formulations that form the hydrogels at 37 °C. Gel formation depended on the chitosan source being possible to produce the thermoresponsive hydrogels at chitosan concentration of 1% with cuttlebone chitosan but 1.5% was needed for squid pen. For the first time, these non-commercial chitosan sources have been used in combination with β-glycerol phosphate to prepare risperidone formulations for controlled drug delivery. Three types of formulations for risperidone-controlled release have been developed, in-situ gelling formulations, hydrogels and xerogels. The release profiles show that in-situ gelling formulations and particularly hydrogels allow an extended control release of risperidone while xerogels are not appropriate formulations for this end since risperidone was completely released in 48 h.Ministerio de Ciencia e Innovación (España)Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaInstituto Pluridisciplinar (IP)TRUEpu

Chitosan derivatives-based films as pH-sensitive drug delivery systems with enhanced antioxidant and antibacterial properties

The purpose of this study was to develop and characterize chitosan (Ch)-based films incorporated with varying molecular weight (Mw) and acetylation degree (AD) chitosan-depolymerization-products (CDP), to be applied as drug delivery materials. As compared to Ch-film, optical and antioxidant potentials of Ch/CDP-based films were improved, particularly using low Mw and AD-CDP. Whereas, films water resistance, mechanical and antibacterial properties increased as CDP-Mw increased and AD decreased. For the thermal and swelling behaviors, better values were obtained using higher Mw and AD-CDP. Further, to assess their in vitro ciprofloxacin (CFX)- release behavior, loaded-CFX Ch/CDP-based films, crosslinked using glutaraldehyde, were prepared. Expect of elongation at break, crosslinked CFX-loaded films showed increased optical, water resistance, tensile strength and thermal properties, as compared to unloaded films. The CFX-release profiles indicated that a slower and sustained release was observed, particularly when using lower Mw and AD-CDP, and mainly for the crosslinked films during 48 h. These films can release CFX for up to 54% in 6 and 24 h, at pH 1.2 and 7.4, respectively. Through this study, novel biodegradable, swellable and pH-sensitive crosslinked Ch/CDP-based films may be considered as suitable and promising drug delivery systems.Ministry of Higher Education and Scientific Research(Tunisia)Ministerio de Economía, Comercio y Empresa(España)Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu

Physicochemical and biological properties of chitosan derivatives with varying molecular weight produced by chemical depolymerization

Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu

Controlled size green synthesis of bioactive silver nanoparticles assisted by chitosan and its derivatives and their application in biofilm preparation

The aim of this work was to explore the effect of various molecular weight (Mw) chitosan depolymerization products (CDP) on the silver nanoparticles (AgNPs) and chitosan/AgNPs blend films production. Produced AgNPs, stable during 30 days in a colloïdal form, were characterized in terms of UV–vis, transmission electron microscopy (TEM), dynamic light scattering (DLS) and fourier transform infrared spectroscopy (FTIR) analyses. AgNPs displayed interesting antibacterial and antioxidant properties that were affected by the physicochemical properties of used chitosans. Interestingly, CDP may be used for the preparation of bioactive and stable AgNPs. Additionally, chitosan/AgNPs blend films were prepared and characterized in terms of physiochemical and biological properties. As compared to the chitosan film, various properties were enhanced in the chitosan/AgNPs blend films, including light barrier, opacity, elongation at break, as well as bioactivities, thus suggesting that films could be used as novel alternative food packaging applications.Ministry of Higher Education and Scientific Research (Tunisia)Ministerio de Economía, Comercio y Empresa (España)Depto. de Química en Ciencias FarmacéuticasFac. de FarmaciaTRUEpu