Search results for "Steroid"
showing 10 items of 1005 documents
Synthesis of New 2-{[(Phenoxy or Phenyl)acetyl]amino}benzoic Acid Derivatives as 3α-Hydroxysteroid Dehydrogenase Inhibitors and Potential Antiinflamm…
1995
A number of 2-([(phenoxy or phenyl)acetyl]amino)benzoic acid derivatives were prepared in about 50% yield from (phenoxy or phenyl)acetyl chloride and anthranilic acid derivatives. All the compounds were tested as in vitro inhibitors of 3 alpha-hydroxysteroid dehydrogenase, since enzyme inhibition predicts potential antiinflammatory activity in vivo. The most active compounds 3 l, m, s are about 3.5 times more active than acetylsalicylic acid (ASA). Activity is influenced by electronic as well as steric effects.
Steroidirungon synteesimenetelmät ja 3-metoksi-15,16-dehydroestronin stereoselektiivinen synteesi
2017
Tutkielman kirjallisessa osiossa käsitellään steroidirungon eri synteesimenetelmiä. Synteesimenetelmät esitellään niiden synteesistrategioiden mukaan, jotka on edelleen jaoteltu niissä esiintyvien reaktioiden tai yleisten lähtöaineiden pohjalta. Johdannossa käydään lyhyesti läpi steroidien rakenne ja niiden biosynteesi ihmisen elimistössä. Tämän jälkeen aloitetaan synteesien tarkastelu sekosteroidi välivaiheisiin pohjautuvista eli steroidirungon keskiosan rakentamiseen keskittyvistä synteesistrategioista, joista siirrytään steroidirungon renkaat järjestyksessä rakentaviin synteeseihin. Näiden synteesien jälkeen palataan luonnonmukaisempaan steroidien synteesitapaan eli polysyklisaatioon. Lo…
Nanodesign of new self-assembling core-shell gellan-transfersomes loading baicalin and in vivo evaluation of repair response in skin
2017
Gellan nanohydrogel and phospholipid vesicles were combined to incorporate baicalin in new self-assembling core-shell gellan-transfersomes obtained by an easy, scalable method. The vesicles were small in size (~107 nm) and monodispersed (P.I. ≤ 0.24), forming a viscous system (~24 mPa/s) as compared to transfersomes (~1.6 mPa/s), as confirmed by rheological studies. Gellan was anchored to the bilayer domains through cholesterol, and the polymer chains were distributed onto the outer surface of the bilayer, thus forming a core-shell structure, as suggested by SAXS analyses. The optimal carrier ability of core-shell gellan-transfersomes was established by the high deposition of baicalin in th…
Widening use of dexamethasone implant for the treatment of macular edema
2017
Vincenza Bonfiglio, Michele Reibaldi, Matteo Fallico, Andrea Russo, Alessandra Pizzo, Stefano Fichera, Carlo Rapisarda, Iacopo Macchi, Teresio Avitabile, Antonio Longo Department of Ophthalmology, University of Catania, Catania, Italy Abstract: Sustained-release intravitreal 0.7 mg dexamethasone (DEX) implant is approved in Europe for the treatment of macular edema related to diabetic retinopathy, branch retinal vein occlusion, central retinal vein occlusion, and non-infectious uveitis. The implant is formulated in a biodegradable copolymer to release the active ingredient within the vitreous chamber for up to 6 months after an intravitreal injection, allowing a prolonged interval of effica…
Estudio de los factores que regulan el tamaño del cerebro y la neurogénesis adulta en un reptil, la lagartija parda (Podarcis liolepis)
2015
Estudios llevados a cabo principalmente en aves y mamíferos muestran que la neurogénesis adulta responde a la regulación de numerosos factores. En los reptiles, sin embargo, la información disponible es escasa. El objetivo principal de esta tesis consiste en identificar factores que regulan el tamaño del cerebro y la neurogénesis adulta en un reptil, la lagartija parda (Podarcis liolepis). En particular estudiamos cómo el sexo, la estacionalidad y las hormonas esteroides afectan al tamaño del cerebro y de los bulbos olfativos, y a la proliferación celular y la migración de las nuevas células en el telencéfalo de estos lagartos. Para ello, capturamos 10 machos adultos de cada sexo cada dos m…
Papel de los neuroesteroides en la modulación de la vía glutamato-óxido nítrico-GMP cíclico. Alteraciones en hiperamonemia crónica. Papel en las alte…
2013
En el cerebelo de ratas hiperamonémicas existe un aumento del tono GABAérgico que está implicado en el deterioro de la función de la vía Glu-NO-GMPc y de las capacidades de aprendizaje y memoria moduladas por esta vía. Al aumento del tono GABAérgico contribuyen: • un aumento de la concentración extracelular de GABA en cerebelo. • un aumento de la cantidad de algunas subunidades de receptores GABAA. • un aumento de la concentración de neuroesteroides que modulan la activación de receptores GABAA. Los neuroesteroides pueden modular diversos receptores incluyendo el receptor GABAA, el NMDA y los receptores sigma. Esta tesis parte de las hipótesis de que: • algunos neuroesteroides modulan, a co…
Effects of an incremental maximal endurance exercise stress-induced cortisol on cognitive performance
2019
Exercise; Cognitive functions; Cortisol Ejercicio físico; Funciones cognitivas; Cortisol Exercici físic; Funcions cognitives; Cortisol Objectives: It can be hypothesized that cognitive performance decreases after fatigue protocol when it coincides with the maximum peak of cortisol. The first aim of this study was to elucidate the effects of a single bout of high intensity exercise on behavioural (i.e., attention and memory) and physiological (i.e., salivary cortisol) responses. The second objective was to evaluate the effect of the performance of the cognitive tasks on cortisol levels. Methods: Thirty-four physically active men (at least 5 days/week of physical activity practice) 38.11 (1.5…
Safety of eterocoxib in subjects with histoty of adverse cutaneous reactions to ASA and/or non steroidal anti-inflammatory drugs
2008
Chemical initiation for butyl and lauryl acrylate monolithic columns for CEC.
2009
Butyl acrylate (BA)- and lauryl acrylate (LA)-based monolithic stationary phases for CEC were synthesized, using a redox system as initiator of polymerization. BA monoliths were initiated with ammonium peroxodisulfate, whereas LA columns were obtained with lauroyl peroxide as initiator. In both cases, TEMED was used to activate the process. The influence of porogenic solvent composition on both morphological and electrochromatographic properties of the resulting monoliths was investigated. Excellent efficiencies (minimum plate heights of 4.2-6.3 microm for BA columns and 2.6-5.3 microm for LA stationary phases, for a PAHs mixture) were achieved. The capability of separation of both types of…
Alterations in Lipid and Carbohydrate Metabolism in Patients with Classic Congenital Adrenal Hyperplasia due to 21-Hydroxylase Deficiency
2009
<i>Background:</i> Classic 21-hydroxylase deficiency (21HD) presents some traits of the metabolic syndrome. <i>Aim:</i> To characterize discrete alterations of lipid and carbohydrate metabolism in children and young adults with classic 21HD, which could predict early atherogenesis. <i>Patients and Methods:</i> Twenty-seven Caucasian patients with classic 21HD (4–31 years); 27 sex-, age- and BMI-matched controls. Clinical parameters, hormonal status and genotype were assessed in all patients. Lipid parameters, including relative (%) and absolute (mg/dl) small-dense low-density lipoproteins subfractions (sd-LDL) were measured in patients and controls. Oral …