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Anna Krupa, Zbisław Tabor, Jacek Tarasiuk, Beata Strach, Krzysztof Pociecha, Elżbieta Wyska, Sebastian Wroński, Ewelina Łyszczarz, Renata Jachowicz
Sildenafil citrate has short biological half-life in humans. Thus, matrix tablets of controlled release were designed and prepared by compaction on the basis of hydrophilic polymers, i.e. HPMC, sodium alginate, carbomer, poloxamer and their mixtures. The impact of these polymers on sildenafil release in vitro and its pharmacokinetics in vivo was evaluated. Since drug release rate from hydrophilic matrices can be govern by the porosity of the matrix, the microstructure of tablets was studied using X-ray microcomputed tomography...
July 1, 2018: European Journal of Pharmaceutical Sciences
Isaac R Melamed, Michael Borte, Laurenz Trawnicek, Ai-Lan Kobayashi, Roger H Kobayashi, Alan Knutsen, Sudhir Gupta, William Smits, Anna Pituch-Noworolska, Magdalena Strach, Grazyna Pulka, Hans D Ochs, James N Moy
Intravenous immunoglobulin (IVIG) therapy is commonly used to treat patients with primary antibody deficiency. This prospective, open-label, non-randomised, multicentre, phase III trial investigated the pharmacokinetics of a new 10% liquid IVIG product (panzyga®; Octapharma) in 51 patients aged 2-75 years with common variable immunodeficiency (n = 43) or X-linked agammaglobulinaemia (n = 8). Patients were treated with IVIG 10% every 3 (n = 21) or 4 weeks (n = 30) at a dose of 200-800 mg/kg for 12 months...
June 15, 2018: European Journal of Pharmaceutical Sciences
Michael Borte, Isaac R Melamed, Grazyna Pulka, Barbara Pyringer, Alan P Knutsen, Hans D Ochs, Roger H Kobayashi, Ai Lan Kobayashi, Sudhir Gupta, Magdalena Strach, William Smits, Anna Pituch-Noworolska, James N Moy
PURPOSE: To assess the efficacy and safety of panzyga® (intravenous immunoglobulin 10%) in preventing serious bacterial infections (SBIs) in patients with primary immunodeficiency diseases (PIDs), a prospective, open-label, multicenter, phase 3 study and an open-label extension study were undertaken. METHODS: Initially, the study drug (infusion rate ≤0.08 mL/kg/min) was administered at intervals of 3 or 4 weeks for 12 months, followed by 3 months of panzyga® at infusion rates increasing from 0...
August 2017: Journal of Clinical Immunology
Kamil Jonas, Marcin Waligóra, Mateusz Hołda, Joanna Sulicka-Grodzicka, Magdalena Strach, Piotr Podolec, Grzegorz Kopeć
BACKGROUND: Poor knowledge on rare diseases (RD) results in a significant delay in their diagnosis and treatment. So far there are no standards of university education in RD. We assessed knowledge on RD among healthcare students and the effectiveness of targeted education. METHODS: We conducted an internet-based survey among students of the faculty of medicine, pharmacy and health sciences. Questions regarded personal information, definition and epidemic data on RD...
2017: Przegla̧d Epidemiologiczny
Anna Krupa, Oriane Cantin, Beata Strach, Elżbieta Wyska, Zbisław Tabor, Juergen Siepmann, Andrzej Wróbel, Renata Jachowicz
Different types of ground hot-melt extrudates loaded with 10, 20 or 30 % of the poorly water-soluble drug tadalafil were prepared and characterized in vitro and in vivo (in rats). Soluplus was used as an amorphous carrier material, whereas mannitol and lactitol were studied as crystalline matrix formers. The systems were characterized using X-ray powder diffraction, thermogravimetric analysis coupled with quadruple mass spectrometry, differential scanning calorimetry, X-ray computed microtomography, in vitro drug release measurements and monitoring of drug plasma levels upon oral administration to rats...
August 7, 2017: International Journal of Pharmaceutics
Joanna Sulicka, Andrzej Surdacki, Mariusz Korkosz, Tomasz Mikołajczyk, Magdalena Strach, Ewa Klimek, Tomasz Guzik, Tomasz Grodzicki
OBJECTIVES: The accumulation of CCR7 (chemokine receptor 7) positive cells in the vessel wall may be involved in endothelial dysfunction and subsequent accelerated atherogenesis. CCR7 plays a crucial role in T cell and monocyte migration/homing and in priming of naive T lymphocytes in non-lymphoid tissues in chronic inflammatory diseases. Our objective was to investigate the endothelial function and inflammation-driven expression of CCR7 on T lymphocytes in patients with ankylosing spondylitis (AS)...
September 2017: Clinical and Experimental Rheumatology
Kinga Sałat, Adrian Podkowa, Natalia Malikowska, Felix Kern, Jörg Pabel, Ewelina Wojcieszak, Katarzyna Kulig, Klaus T Wanner, Beata Strach, Elżbieta Wyska
BACKGROUND AND PURPOSE: Since GABAergic dysfunction underlies a variety of neurological and psychiatric disorders, numerous strategies leading to the augmentation of GABAergic neurotransmission have been introduced. One of them is the inhibition of GABA reuptake from the synaptic cleft mediated by four plasma membrane GABA transporters (GAT1-4). GAT1 which is exclusively expressed in the brain is an interesting target for centrally acting drugs. In this research, pharmacological properties of a novel, highly potent and selective inhibitor of GAT1, the guvacine derivative named DDPM-2571, were assessed in vivo...
February 2017: Neuropharmacology
Fatih Ilkaya, Ozgur Yesilyurt, Melik Seyrek, Ozgur Gunduz, Tayfun Ide, Ahmet Akar, Ahmet Ulugol, Hasan Guzel, Ahmet Dogrul, Durmus Ucar, Caner Gunaydin
Intradermal injection of pruritogens such as serotonin, histamine and compound 48/80 into the skin and then, the evaluation of the scratching behavior is the commonly used animal model to advance pruritic research and drug development. However, predictive validity of this model is poorly documented. There is a close interaction between itch and pain sensations with regard to mediation through an anatomically and functionally identical neuronal pathway. One approach is whether the existing animal model of itch differentiates itch or pain to show efficacy of clinically effective analgesic drugs as a back translation...
2016: Acta Neurobiologiae Experimentalis
Anna Krupa, Marc Descamps, Jean-François Willart, Beata Strach, Elżbieta Wyska, Renata Jachowicz, Florence Danède
In this study, the suitability of high-energy ball milling was investigated with the aim to vitrify tadalafil (TD) and improve its bioavailability. To achieve this goal, pure TD as well as binary mixtures composed of the drug and Soluplus (SL) were coprocessed by high-energy ball milling. Modulated differential scanning calorimetry (MDSC) and X-ray powder diffraction (XRD) demonstrated that after such coprocessing, the crystalline form of TD was transformed into an amorphous form. The presence of a single glass transition (Tg ) for all the comilled formulations indicated that TD was dispersed into SL at the molecular level, forming amorphous molecular alloys, regardless of the drug concentration...
November 7, 2016: Molecular Pharmaceutics
Chang Liu, Xi-Ying Zhang, Xi-Ruo Wen, Mei Shi, Xiu-Lan Chen, Hai-Nan Su
A yellow-pigmented, rod-shaped, non-flagellated, aerobic and Gram-reaction-negative bacterium, designated strain SM1212T, was isolated from intertidal sand of Kongsfjorden, Svalbard. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain SM1212T constituted a distinct lineage within the family Flavobacteriaceae. It shared highest 16S rRNA gene sequence similarities with the type strains of Bizionia echini (96.0 %), Lacinutrix jangbogonensis (95.8 %) and Psychroserpens damuponensis (95...
January 2016: International Journal of Systematic and Evolutionary Microbiology
Michal Strach, Renaud C Belin, Jean-Christophe Richaud, Jacques Rogez
The reduction of six mixed-oxide samples containing 14, 24, 35, 46, 54, and 62 mol % Pu was studied in situ by X-ray diffraction. The samples were first oxidized in air and subsequently reduced in a controlled atmosphere corresponding to a stoichiometric composition with an O/M = 2.00. After oxidation, we observed two structures, one cubic and one orthorhombic, MO2+x and M3O8-z. The two phases were subsequently reduced back to their stoichiometric O/M = 2.00 in a controlled atmosphere. The plutonium contents of the two resulting cubic structures differed from the initial one...
September 21, 2015: Inorganic Chemistry
Surapong Chatpun, Jirut Meesane, Pairaya Rujirojindakul
Plasma expanders (PEs) such as hydroxyethyl strach are widely used for volume replacement. The plantation and production of tapioca in Thailand is abundant which may provide a new source for PEs starch with novel properties. This work investigated the properties and circulatory effects of native tapioca starch-based PE (TPE). Various formulations of mixture between native tapioca starch and 0.9% sodium chloride solution were prepared and characterized in order to obtain the proper physicochemical and rheological properties...
February 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Beata Strach, Elżbieta Wyska, Krzysztof Pociecha, Anna Krupa, Renata Jachowicz
A sensitive HPLC method was developed and validated for the determination of sildenafil concentrations in rat plasma (200 μL) using a liquid-liquid extraction procedure and paroxetine as an internal standard. In order to eliminate interferences and improve the peak shape, a back-extraction into an acidic solution was utilized. Chromatographic separation was achieved on a cyanopropyl bonded-phase column with a mobile phase composed of 50 m m potassium dihydrogen phosphate buffer (pH 4.5) and acetonitrile (75:25, v/v), pumped at the flow rate of 1 mL/min...
October 2015: Biomedical Chromatography: BMC
Maciej Powerski, Anke Busse, Max Seidensticker, Frank Fischbach, Ricarda Seidensticker, Katharina Strach, Oliver Dudeck, Jens Ricke, Maciej Pech
PURPOSE: Prior to radioembolization (RE) of hepatic tumors, many centers prophylactically occlude the cystic artery (CA) during evaluation angiography (EVA) to prevent radiation-induced cholecystitis. There is no conclusive evidence for the protective effect of CA embolization and it bears the risk of inducing ischemic cholecystitis. The aim of this study is to evaluate the justification for CA embolization by comparing clinical and morphologic imaging parameters between patients undergoing coil occlusion of the cystic artery (COCA) and those with uncoiled CA (UCCA)...
June 2015: Cardiovascular and Interventional Radiology
M Rutkowska-Zapała, M Suski, R Szatanek, M Lenart, K Węglarczyk, R Olszanecki, T Grodzicki, M Strach, J Gąsowski, M Siedlar
Immune cells may take part in the renin-angiotensin-aldosterone system (RAAS), which plays a pivotal role in the regulation of vascular tone and blood pressure. The aim of the study was to analyse the expression and activity of angiotensin-converting enzyme type 1 (ACE1) and ACE2 in human monocytes (MO) and their subsets. The highest relative level of ACE1-, as well as ACE2-mRNA expression, was observed in CD14(++)CD16(-) (classical) MO. Moreover, in these cells, mean level of ACE2-mRNA was almost two times higher than that of ACE1-mRNA (11...
July 2015: Clinical and Experimental Immunology
Joanna Pera, Sarah Lechner, Saskia Biskup, Magdalena Strach, Tomasz Grodzicki, Agnieszka Slowik
No abstract text is available yet for this article.
January 2015: Clinical Neurology and Neurosurgery
Hong Nie, H Fabian Jacobi, Katrin Strach, Chunming Xu, Hongjun Zhou, Jan Liebetrau
The effects of ammonia concentration on the performance and stability of mono-fermentation of chicken manure were investigated in a lab-scale continuous stirred tank reactor at 40 °C. Technical stripping was performed to remove ammonia from the liquid fraction of digestate, and the entire product was recycled to the fermenter to control ammonia concentration in the fermenter. Organic loading rate (OLR) of 5.3 gVS/(L d) was achieved with an average free ammonia nitrogen (FAN) concentration of 0.77 g/L and a specific gas yield of 0...
February 2015: Bioresource Technology
Magdalena Strach, Piotr Nalepa, Joanna Sulicka-Grodzicka, Izabella Kierzkowska, Maciej Siedlar, Tomasz Grodzicki
Mycobacteria is a large group of pathogens that are common in environment, in soil and tap water. Although mycobacteria [non tuberculosis mycobacteria] can inhabit body surface without causing any disease in the circumstances of primary or secondary immunodeficiency can cause clinically significant organ or systemic damage. Defect of IL-12/INFgamma axis is an example of primary immunodeficiency that predispose to mycobacterial infections while protection against other microorganisms is not damaged. We present review of known defects of IL-12/IFNgamma axis and brief presentation of our own experience...
2013: Przegla̧d Lekarski
Sebastian Wintz, Christopher Bunce, Andreas Neudert, Michael Körner, Thomas Strache, Matthias Buhl, Artur Erbe, Sibylle Gemming, Jörg Raabe, Christoph Quitmann, Jürgen Fassbender
We report on pairs of converging-diverging spin vortices in Co/Rh/NiFe trilayer disks. The lateral magnetization distribution of these effective spin merons is directly imaged by means of element-selective x-ray microscopy. By this method, both the divergence and circulation states of the individual layers are identified to be antisymmetric. Reversal measurements on corresponding continuous films reveal that biquadratic interlayer exchange coupling is the cause for the effective meron pair formation. Moreover, their three-dimensional magnetization structure is determined by micromagnetic simulations...
April 26, 2013: Physical Review Letters
Christian Wybranski, Katharina Strach, Felix Krenzien, Uta Wonneberger, Jürgen Bunke, Friedrich W Röhl, Ortrud Kosiek, Jens Ricke, Frank Fischbach
OBJECTIVES: The aims of our study were (1) to assess the feasibility, effectiveness, and safety of exclusively magnetic resonance (MR)-guided freehand percutaneous abscesses drainage using a 1.0-T open MR scanner and (2) to evaluate the optimal method to visualize drainage catheters in situ. MATERIAL AND METHODS: In vitro studies in a dedicated MR gelatin phantom were performed to assess visualization of 8 different sizes of drainage catheters after instillation of sole 0...
June 2013: Investigative Radiology
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