Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 7 de 7
Filter
Add more filters










Publication year range
1.
Int J Cosmet Sci ; 42(6): 529-535, 2020 Dec.
Article in English | MEDLINE | ID: mdl-32895982

ABSTRACT

This work analyses the role of proteoglycans on skin ageing, influenced by the presence of glycosylated proteins, which exercise diverse functions on the skin. They are essential components that restore the cells, providing hydration, maintaining hydration of the extracellular matrix, preventing the formation of wrinkles thanks to their ability to combine to other molecules such as collagen or hyaluronic acid and favouring the smoothness of the skin texture. The use of these proteins is a very recent and promising topic, since their application may revolutionize skin ageing therapies. Of the existing proteoglycans, decorin, versican and perlecan are of special note, playing a fundamental role on skin.


Nous avons analysé dans cette étude le rôle des protéoglycanes dans le vieillissement de la peau, conditionné par la présence des protéines glycosylées qui exercent plusieurs fonctions sur la peau. Ce sont des composants essentiels qui restaurent les cellules, fournissent de l'hydratation en maintenant l'hydratation de la matrice extracellulaire en évitant la formation de rides cutanées grâce à sa capacité de se combiner à d'autres molécules tels que le collagène ou l'acide hyaluronique qui favorisent la douceur de la peau. L'utilisation de ces protéines est un des sujets les plus récents et prometteurs, étant donné que son application peut représenter une révolution quant aux thérapies qui luttent contre le vieillissement cutané. Parmi les protéoglycanes ressortent la décorine, le versicane et le perlécane qui jouent un rôle fondamental sur le derme.


Subject(s)
Proteoglycans/physiology , Skin Aging/physiology , Humans
2.
Ars pharm ; 51(supl.3): 479-484, jul. 2010. tab
Article in Spanish | IBECS | ID: ibc-99507

ABSTRACT

INTRODUCCIÓN: Los probióticos son “microorganismos vivos que administrados en cantidades adecuadas confieren beneficios en la salud del hospedador”. Sin embargo, el principal problema que se presenta a la hora de incorporar bacterias probióticas en un producto cualquiera, es la escasa resistencia de estos microorganismos a los procesos tecnológicos y ambientales, lo que supone un gran inconveniente para su inclusión en productos alimentarios o farmacéuticos. En este sentido, las técnicas de microencapsulación son de un gran interés porque permiten aislar a las bacterias mediante una cubierta, evitando así, su exposición a las condiciones adversas. Por tanto, el objetivo de este trabajo ha sido desarrollar una técnica de microencapsulación compatible con una cepa probiótica destinada a formas farmacéuticas para el tratamiento de la vaginitis. MATERIALES Y MÉTODOS: La técnica propuesta es la emulsificación-gelificación iónica interna 2. Una vez obtenidas las micropartículas, se procede al análisis de la supervivencia de los probióticos microencapsulados, mediante el método desarrollado por Sheu y cols 3. La evaluación del tamaño de partícula se llevo a cabo mediante microscopia óptica. RESULTADOS: La viabilidad del probiótico a lo largo del proceso de síntesis de las partículas se reduce en 1 log UFC. El tamaño de partícula está comprendido entre 40-240 micrómetros, o el predomínando, el intervalo de 120 a 160 micrómetros. DISCUSIÓN: La técnica desarrollada es compatible con el probiótico propuesto, obteniéndose una viabilidad, que permitiría alcanzar la dosis necesaria para el restablecimiento de la microbiota vaginal con tan solo un gramo de producto. Así mismo, el tamaño de las partículas, se considera aceptable para la terapéutica tópica(AU)


INTRODUCTION: Probiotics are "live microorganisms administered in adequate amounts conferhealth benefits on the host". But the main problem, when probiotics are incorporated in some products is their low resistance to technological and environmental processes. In this sense, microencapsulation techniques are good methods to protect the bacteria from adverse conditions since, it isolates bacteria from the environment and protect them from detrimental conditions. The aim of this study was to perform a microencapsulation technique compatible with the probiotic strain to develop a form for vaginal administration. MATERIALS AND METHODS: The ionic emulsification-internal gelation was used. After obtaining the microparticles, it was analyzed the survival of microencapsulated probiotics, using the method developed by Sheu et al. The evaluation of particle size was carried out by optical microscopy. RESULTS: During the process of microencapsulation, the viability of probiotic was reduced by 1 log CFU. The range of particle size is between 40-240 micrometers, although most of the particles were between 120 and 160 micrometers. DISCUSSION: The developed technique is compatible with the probiotic, since the viability of microencapsulated product, allows us to obtain a pharmaceutical form optimal for vaginal, administration with 1g of particles. Likewise, particle size is also considered acceptable for topical therapy(AU)


Subject(s)
Probiotics/metabolism , Probiotics/pharmacology , Probiotics/pharmacokinetics , Capsules/pharmacology , Capsules/therapeutic use , Drug Compounding/methods , Drug Compounding , Probiotics/chemistry , Probiotics/chemical synthesis , Capsules/chemical synthesis , Drug Compounding/statistics & numerical data , Drug Compounding/trends
3.
An. pediatr. (2003, Ed. impr.) ; 72(5): 302-308, mayo 2010. tab, graf
Article in Spanish | IBECS | ID: ibc-81988

ABSTRACT

Introducción: La adición de espesantes a las fórmulas denominadas fórmulas antirregurgitación (F-AR) tiene como objetivo aumentar la viscosidad para el tratamiento del reflujo gastroesofágico no complicado. Objetivo: Determinar la viscosidad y el comportamiento reológico de las diferentes F-AR de inicio del mercado español, y compararlas con una fórmula de inicio estándar y tras su espesamiento con cereales sin gluten (10g/100ml). Método: La viscosidad de las muestras se determinó con un reómetro Bohlim CS de estrés controlado en condiciones basales (25°C, pH 7) y tras 30 y 60min de incubación en condiciones de simulación de fisiología gástrica (FG) (37°C, pH 4 y 10g/100ml de pepsina); la viscosidad se expresó en centipoises (cP). Resultados: Todas las fórmulas demostraron un aumento de la viscosidad tanto en condiciones basales como en condiciones de FG. Las fórmulas que contenían harina de semilla de algarrobo con una concentración de 2,9g/100g y un cociente de proteínas similar al de la leche de vaca (80% de caseína/20% de lactosuero) mostraron la viscosidad más alta y mantenida (70 y 90cP), con diferencias significativas con respecto a la fórmula de inicio en todas las mediciones. Cuando este espesante estaba en fórmulas con un cociente proteico similar al de la leche materna (40% de caseína/60% de lactosuero), la viscosidad alcanzada fue menor, y sólo con una concentración de 4,7g/100g se alcanzaron viscosidades superiores a 50cP, con diferencias significativas versus la fórmula de inicio. Las fórmulas que contenían almidones (arroz, patata y maíz) alcanzaron una viscosidad menor de 50cP y menos mantenida, y no alcanzaron una diferencia significativa. La viscosidad alcanzada tras la adición de cereales tanto en condiciones basales como en condiciones de FG fue similar a la alcanzada con las fórmulas más efectivas con espesantes. La concentración lipídica no se implicó en el distinto comportamiento reológico de las fórmulas. Conclusión: La viscosidad de las F-AR depende del agente empleado, la concentración de éste y el cociente proteico. No todas alcanzan una viscosidad de 50cP, valor hipotético por conseguir, dado que representaría doblar la viscosidad de la fórmula de inicio. Futuros estudios son necesarios para determinar el grado de viscosidad ideal y cómo conseguirlo (AU)


Introduction: Thickened infant formulas, specially formulated to increase the viscosity, are commonly used in the treatment of regurgitation in the non-complicated gastroesophageal reflux. Objective: To analyse viscosity and the rheological behaviour of different thickened standard formulas on the Spanish market compared to a standard formula with or without the addition of 10g/100mL of gluten-free cereals. Methods: Viscosity of the samples was evaluated in a Bohlim CS-1o controlled-stress rheometer and was performed at basal conditions (25°C, pH 7) and at simulated gastric conditions (37°C, pH 4 and 10g/100mL of pepsin) at time 0, 30 and after 60min of incubation. Values were expressed as centipoises (cp) (1cp=1/100p). Results: All formulas show a viscosity increase both in basal conditions and in gastric simulated conditions but the behaviour is very heterogeneous. Formulas containing bean gum (carob seed flour) with 2.9g/100g and a protein ratio similar to cow's milk (80 casein/20 whey) showed the highest and consistent viscosity (70cp and 90cp), with significant differences compared to the standard formula in all the measurements. When this thickener is in formulas with a protein ratio similar to breast milk (40 casein/60 whey) the viscosity was lower and reached 50cp only with the thickener at a concentration of 4.7gr/100g, achieving significant differences versus standard formula. The formulas with starch thickeners (rice, potatoes and corn) achieved a lower and less consistent viscosity, with no significant difference. The viscosity reached after the addition of cereals both in basal conditions and in gastric simulated conditions was similar to that achieved with more effective thickeners. Lipid concentration is not involved in viscosity and rheological behavior. Conclusion: The viscosity of the thickened infant formula depends on the agent used, concentration and protein ratio. Not all reach a viscosity of 50cp, hypothetical value to reach, since it doubles the viscosity of a standard formula. The ideal viscosity to be reached and the role of other components of the formula in the viscosity and rheological behaviour is still unclear (AU)


Subject(s)
Humans , Gastroesophageal Reflux/diet therapy , Food, Formulated/analysis , Rheology/methods , Thickeners , Viscosity
4.
Ars pharm ; 51(supl.2): 339-342, mayo 2010.
Article in Spanish | IBECS | ID: ibc-88651

ABSTRACT

Debido a la implantación del Plan Bolonia, en las Universidades españolas se están produciendonumerosos cambios docentes. Uno de los más destacados es la potenciación del aprendizaje autónomodel alumno. Sin embargo, los alumnos que acceden a los diferentes grados procedentes de la E.S.O.(Educación Secundaria Obligatoria) no están acostumbrados a este tipo de aprendizaje. De ahí, quelos alumnos necesiten de un tutor que les guíe, facilitando así, su incorporación al EEES (EspacioEuropeo de Educación superior). Para ello, se propone la utilización de un sistema de tutorizaciónllevado a cabo por alumnos de doctorado y de último curso. La propuesta se realiza en base a laexperiencia y al éxito que otros programas están teniendo en el ámbito nacional e internacional(AU)


Numerous educational changes are being producing due to the introduction of the Bologna Process inSpanish universities. One of the most prominent is the improvement of student's autonomous learning.Nevertheless students who access to the different degrees, from the E.S.O. (Obligatory SecondaryEducation) are not used to this type of learning. For this reason, students need a tutor who guidesthem, facilitating their incorporation to the EHEA (European Higher Education Area). The use of asystem of tutoring led by PhD students and student from the last course is proposed. The proposal ismade based on experience and success of others national and international programs(AU)


Subject(s)
Humans , Male , Female , Adult , Mentoring/methods , Mentoring/trends , Education, Graduate/methods , Education, Graduate/organization & administration , Education, Graduate/standards , Education, Pharmacy, Graduate/methods , Mentoring/organization & administration , Mentoring/standards , Education, Pharmacy, Graduate/organization & administration , Education, Pharmacy, Graduate/standards
5.
Ars pharm ; 51(supl.2): 443-450, mayo 2010. ilus
Article in Spanish | IBECS | ID: ibc-88666

ABSTRACT

La experiencia de la Universidad de Granada en programas de competencia o formación profesional de alumnos no universitarios es reducida o nula, sin embargo uno de los objetivos de esta es colaborar en la formación de los profesores responsables de las enseñanzas medias a través del Máster de Profesorado de Secundaria Obligatoria, Bachillerato, Formación Profesional y Enseñanzas de Idiomas.Asimismo, debemos reconocer que en la vida laboral son muchas las competencias similares entre profesionales procedentes de enseñanza de grado superior y aquellos que no han cursado estudios universitarios.En este sentido deberíamos conocer de primera mano las necesidades y perspectiva de los que serán nuestros alumnos de forma indirecta.Por este motivo parte del profesorado del Departamento de Farmacia y Tecnología Farmacéutica de la Universidad de Granada inicia un programa de acogida de estudiantes de Formación Profesional para la realización de su practicum. Esta primera experiencia servirá para el desarrollo y reflexión de futuras planificaciones docentes en lo referente a la participación del área en dicho master(AU)


The experience of the University of Granada in competition or training programs for professional non-university students is reduced or absent, however one of the goals of this is to collaborate in the training of teachers responsible for school level through the Master of Teaching Compulsory Secondary, High school, vocational training and language studies.We must also acknowledge that in working life are many similar skills among professionals from higher-level education and those who have not attended university.In this sense we should know first hand the needs and perspectives of our future students indirectly.For this reason the faculty of the Department of Pharmacy and Pharmaceutical Technology, University of Granada began hosting a program of vocational training students to carry out their practicum. This first experience will serve the future development planning and reflection of teachers with regard to participation in the master area(AU)


Subject(s)
Humans , Male , Female , Education, Pharmacy, Graduate/methods , Education, Pharmacy, Graduate/trends , Training Support/methods , Training Support/organization & administration , Education, Pharmacy, Graduate/organization & administration , Education, Pharmacy, Graduate/statistics & numerical data , Education, Pharmacy, Graduate/standards
6.
An Pediatr (Barc) ; 72(5): 302-8, 2010 May.
Article in Spanish | MEDLINE | ID: mdl-20395184

ABSTRACT

INTRODUCTION: Thickened infant formulas, specially formulated to increase the viscosity, are commonly used in the treatment of regurgitation in the non-complicated gastroesophageal reflux. OBJECTIVE: To analyse viscosity and the rheological behaviour of different thickened standard formulas on the Spanish market compared to a standard formula with or without the addition of 10 g/100mL of gluten-free cereals. METHODS: Viscosity of the samples was evaluated in a Bohlim CS-1o controlled-stress rheometer and was performed at basal conditions (25 degrees C, pH 7) and at simulated gastric conditions (37 degrees C, pH 4 and 10 g/100mL of pepsin) at time 0, 30 and after 60 min of incubation. Values were expressed as centipoises (cp) (1 cp=1/100 p). RESULTS: All formulas show a viscosity increase both in basal conditions and in gastric simulated conditions but the behaviour is very heterogeneous. Formulas containing bean gum (carob seed flour) with 2.9 g/100g and a protein ratio similar to cow's milk (80 casein/20 whey) showed the highest and consistent viscosity (70 cp and 90 cp), with significant differences compared to the standard formula in all the measurements. When this thickener is in formulas with a protein ratio similar to breast milk (40 casein/60 whey) the viscosity was lower and reached 50 cp only with the thickener at a concentration of 4.7 gr/100g, achieving significant differences versus standard formula. The formulas with starch thickeners (rice, potatoes and corn) achieved a lower and less consistent viscosity, with no significant difference. The viscosity reached after the addition of cereals both in basal conditions and in gastric simulated conditions was similar to that achieved with more effective thickeners. Lipid concentration is not involved in viscosity and rheological behaviour. CONCLUSION: The viscosity of the thickened infant formula depends on the agent used, concentration and protein ratio. Not all reach a viscosity of 50 cp, hypothetical value to reach, since it doubles the viscosity of a standard formula. The ideal viscosity to be reached and the role of other components of the formula in the viscosity and rheological behaviour is still unclear.


Subject(s)
Food, Formulated , Rheology/methods , Viscosity , Gastroesophageal Reflux/epidemiology , Humans , Infant , Infant, Newborn
7.
Ars pharm ; 50(1): 43-50, ene.-mar. 2009. ilus, tab
Article in Spanish | IBECS | ID: ibc-75344

ABSTRACT

A la hora de utilizar probióticos, el principal problema que se presenta, es la escasa resistencia de estos a diferentes condiciones ambientales y tecnológicas. Las técnicas de microencapsulación son un buen método para proteger a estos microorganismos, sin embargo no todas las técnicas son apropiadas para los probióticos. En este artículo proponemos la técnica de gelificación interna, que por sus características permite la obtención de un tamaño de partícula adecuado y la supervivencia de los microorganismos(AU)


The main problem when probiotics are used is the low resistance of these to different environmental and technological conditions. The microencapsulation techniques are a good method in order to protect the probiotics, Nevertheless not all techniques of microencapsulation are suitable for probiotics. In this paper, we propose the internal gelification which allows us to obtain a suitable particle size and the survival of the microorganisms(AU)


Subject(s)
Humans , Probiotics , Probiotics/administration & dosage , Drug Compounding , Alginates/administration & dosage , Gelling Agents
SELECTION OF CITATIONS
SEARCH DETAIL
...