A Magyar Mesterséges Táplálási Társaság 2016. évi kongresszusán elhangzó előadások kivonatai. Mátraháza, Lifestyle Hotel Mátra, 2016. október 6–8.

A felnőtt coeliakiások zabfogyasztásának vizsgálata | Melyik tápszert javasoljam a betegemnek? Dilemmák, lehetőségek és korlátok Magyarországon és Európában | A malnutritio kockázatának önszűrése | A táplálás során végzett ellenőrző vizsgálatok | Az energiaszükséglet meghatározása, az energiaszükséglet mérése – direkt és indirekt kalorimetria | Inkompatibilitásokból származó gyógyszerelési hibák megelőzési stratégiája, a klinikai gyógyszerész szerepe | A preoperatív táplálás fejlesztésének gyakorlati tapasztalatai | A tápszerforgalom és a táplálásterápiás szokások változása hazánkban | Gyári tápoldatkeverékek stabilitása individualizáló kiegészítések nyomán | A táplálásterápia monitorozása gyermekek onkohematológiai betegségében | Gyermekkori onkohematológiai betegség során alkalmazott táplálásterápia hatása a túlélésre és a túlélő betegek tápláltsági állapotára | Táplálásterápia a súlyos agysérültek korai rehabilitációjának vonatkozásában | Magisztrális parenteralis tápoldatok (Magi-AIO-TPN) eltarthatósága | A Pécsi Tudományegyetem klinikai gyógyszerészi szolgálatának bővítése a táplálásterápia területén | Egészséges mikroflórával a perioperatív szövődmények megelőzéséér

Comparative evaluation of the effect of cyclodextrins and pH on aqueous solubility of apigenin

Abstract The aqueous solubility of a flavonoid, apigenin, was studied in the presence of first generation cyclodextrins (α-CyD, β-CyD, γ-CyD), ionic and nonionic synthetic derivatives of β-CyD, namely SBE-β-CyD, HP-β-CyD and RM-β-CyD at various physiological pH. The order of solubility enhancement was as follows: RM-β-CyD > SBE-β-CyD > γ-CyD > HP-β-CyD > β-CyD > α-CyD. The phase solubility diagrams of HP-β-CyD and SBE-β-CyD indicated Higuchi AL subtype behavior, suggesting 1:1 stoichiometry of the complex. In contrast, AP subtype, so higher order complex formation can be assumed in the case of RM-β-CyD and γ-CyD. The formation of inclusion complexes has been confirmed by absorption and fluorescence spectroscopic measurements. Increased antioxidant activity was observed due to the inclusion complexes. These results prove that synthetic derivatives of β-CyD will be potentially useful excipients in the development of drug delivery systems for healthcare products containing flavonoids

Controlled release oral delivery of apigenin containing pellets with antioxidant activity.

BACKGROUND: Drug delivery of phytochemicals has gained interest recently due to their remarkable health effects. Apigenin, a plant flavonoid, has antioxidant, anti-inflammatory and anticancer activities but its delivery is challenging. It could be absorbed through the whole intestine, however, it has poor bioavailability due to its low aqueous solubility. In Europe, the daily intake was estimated to be as low as 3+/-1 mg. Pellets offer several advantages such as improved bioavailability and various resultant drug release profiles can be obtained by simply mixing pellets with different coatings. OBJECTIVE: The objective of our study was to develop a carrier system containing 20 mg apigenin thus enhancing intake and to offer reduction of oxidative stress which can cause inflammation in the intestine. METHOD: The apigenin powder was dispersed in aqueous solution of binding material and layered onto the inert cores in a fluidized bed apparatus. The layered cores were further coated with enteric polymers and the process parameters were optimized. RESULTS: The prepared pellets met with the requirements and have good physical characteristic. 10 % (w/w) Eudragit(R) L was suitable for enteric coating with a complete release at pH 6.8 within 1 hour. 15% (w/w) Eudragit(R) FS coating ensured acid resistance ability and colonic delivery. The therapeutic efficiency was confirmed with antioxidant activity measurement by using DPPH* assay. CONCLUSION: Enteric coated spheres allow targeted delivery into the intestine and colon thus reaching the main absorption site. Pellets were proved to be an optimal delivery system for apigenin thus providing enhanced apigenin intake

Study on the dissolution improvement of albendazole using reconstitutable dry nanosuspension formulation.

The aim of the study was to improve the solubility and dissolution rate of the poorly water soluble drug albendazole via surfactant assisted media milling process. Preparation of a nanosuspension and then post-processing with a solidification technique applied to improve the applicability of nanosuspension in a solid dosage forms carrier. The dry nanosuspension was obtained using microcrystalline cellulose as solid carrier after tray drying at 40 degrees C. Both reconstitution from the solid carrier and dissolution profile studies were investigated in biorelevant Artificial Rumen Fluid (ARF) at pH=6.50 and dissolution media at pH=1.20 and pH=6.80. Reconstitution studies have demonstrated that the mean hydrodynamic diameter values of albendazole crystals released from the dry suspension were nanosized (intensity weighted hydrodynamic diameter values: 200.40+/-2.318nm in ARF at pH=6.50, 197.17+/-0.208nm in dissolution medium at pH=6.80). Thermodynamic solubility studies have indicated a 2.98 times increase in water solubility (144.41+/-0.09mug/ml milled, 48.38+/-0.01mug/ml unmilled, 8.21+/-0.02mug/ml albendazole powder) in ARF at pH=6.50, and 2.33 times in dissolution medium at pH=6.8: (146.27+/-0.28mug/ml milled, 62.71+/-0.04mug/ml unmilled, 9.00+/-0.01mug/ml albendazole powder), and 13.65% increase at pH=1.20 (1728.31+/-3.31mug/ml milled, 1559.41+/-0.40mug/ml unmilled, 1520.70+/-1.39mug/ml albendazole powder), dissolution rates have also increased. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) imaging investigations detected no albendazole nanocrystals on the surface of the carrier, which demonstrated the incorporation of albendazole into the microcrystalline cellulose solid carrier structure

Study on process parameters and optimization of microencapsulation based on phase separation

As surfactants are capable of influencing the droplet formation, our study primarily aims the investigation of the effect of a nonionic surfactant e.g. Polysorbate 80 on the formation of microspheres on the course of vibrating nozzle method with coacervation. The experiments also concern the impact of the different process parameters (e.g. vibration frequency, feed rate and voltage) on the shape and size distribution of microspheres characterized by laser diffraction size determination completed with particle image analysis. The calcium-alginate microspheres were processed using freeze-drying to ensure solid state with better drug carrier capability. Addition of isomalt was advantageous in the formation of freeze-dried microspheres at low alginate concentration, which was explained by micro-CT analysis of the constructed particle structure. The internal three-dimensional network of calcium alginate demonstrated a more cancellous architecture ameliorating the roundness of microparticles