Adori C.,Semmelweis University |
Zelena D.,Hungarian Academy of Sciences |
Timar J.,Semmelweis University |
Gyarmati Z.,Semmelweis University |
And 8 more authors.
Behavioural Brain Research | Year: 2010
The recreational party drug "ecstasy" (3,4-methylenedioxymethamphetamine MDMA) is particularly popular among young adults who are in the childbearing age and thus there is a substantial risk of prenatal MDMA exposure. We applied an intermittent treatment protocol with an early first injection on pregnant Wistar rats (15 mg/kg MDMA s.c. on the E4, E11 and E18 days of gestation) to examine the potential physiological, endocrine and behavioral effects on adult male and female offspring. Prenatal MDMA-treatment provoked reduced body weight of offspring from the birth as far as the adulthood. Adult MDMA-offspring had a reduced blood-glucose concentration and hematocrit, altered relative spleen and thymus weight, had lower performance on wire suspension test and on the first trial of rotarod test. In contrast, no alteration in the locomotor activity was found. Anxiety and depression related behavioral parameters in elevated plus maze, sucrose preference or forced swimming tests were normal. MDMA-offspring had elevated concentration of the ACTH-precursor proopiomelanocortin and male MDMA-offspring exhibited elevated blood corticosterone concentration. No significant alteration was detected in the serotonergic marker tryptophan-hydroxylase and the catcholaminergic marker tyrosine-hydroxylase immunoreactive fiber densities in MDMA-offspring. The mothers exhibited reduced densities of serotonergic but not catecholaminergic fibers after the MDMA treatment. Our findings suggest that an intermittent prenatal MDMA exposure with an early first injection and a relatively low cumulative dose provokes mild but significant alterations in physical-physiological parameters and reduces motor skill learning in adulthood. In contrast, these adult offspring do not produce anxiety or depression like behavior. © 2009 Elsevier B.V. All rights reserved. Source
Deak V.,University of Pecs |
Lukacs R.,University of Pecs |
Buzas Z.,Institute of Genetics |
Buzas Z.,National Institute of Pharmacy |
And 5 more authors.
Journal of Bacteriology | Year: 2010
Genes encoding the tail proteins of the temperate phage 16-3 of the symbiotic nitrogen-fixing bacterium Sinorhizobium meliloti 41 have been identified. First, a new host range gene, designated hII, was localized by using missense mutations. The corresponding protein was shown to be identical to the 85-kDa tail protein by determining its N-terminal sequence. Electron microscopic analysis showed that phage 16-3 possesses an icosahedral head and a long, noncontractile tail characteristic of the Siphoviridae. By using a lysogenic S. meliloti 41 strain, mutants with insertions in the putative tail region of the genome were constructed and virion morphology was examined after induction of the lytic cycle. Insertions in ORF017, ORF018a, ORF020, ORF021, the previously described h gene, and hII resulted in uninfectious head particles lacking tail structures, suggesting that the majority of the genes in this region are essential for tail formation. By using different bacterial mutants, it was also shown that not only the RkpM and RkpY proteins but also the RkpZ protein of the host takes part in the formation of the phage receptor. Results for the host range phage mutants and the receptor mutant bacteria suggest that the HII tail protein interacts with the capsular polysaccharide of the host and that the tail protein encoded by the original h gene recognizes a proteinaceous receptor. Copyright © 2010, American Society for Microbiology. All Rights Reserved. Source
Blanchaert B.,Catholic University of Leuven |
Poderos Jorge E.,Catholic University of Leuven |
Jankovics P.,Semmelweis University |
Jankovics P.,National Institute of Pharmacy |
And 2 more authors.
Chromatographia | Year: 2013
The development of a simple reversed phase ion pair liquid chromatographic method for the assay of kanamycin A has been described. Because of the lack of a UV chromophore in the structure of kanamycin A, borate complexation was used to allow direct UV detection at 205 nm. Three columns were evaluated in this study: Zorbax Extend C18 (4.6 mm × 250 mm; 5 μm), XBridge C18 (4.6 mm × 250 mm; 5 μm) and apHera C18 (4.6 mm × 250 mm; 5 μm). The mobile phase was a mixture of 0.1 M disodium tetraborate (pH 9.0) and water (20:80, v/v) supplemented with 0.5 g L-1 sodium octanesulphonate. Final chromatographic conditions were achieved on the XBridge column at 50 C. The method was validated according to ICH guidelines and applied to a commercially available sample. It is much faster and more specific than the current microbiological assay prescribed in the European Pharmacopoeia. No expensive equipment is necessary to perform this assay making it a viable replacement. © 2013 Springer-Verlag Berlin Heidelberg. Source
Vergallo C.,University of Salento |
Dini L.,University of Salento |
Szamosvolgyi Z.,National Institute of Pharmacy |
Tenuzzo B.A.,University of Salento |
And 3 more authors.
PLoS ONE | Year: 2013
The effect of inhomogeneous static magnetic field (SMF)-exposure on the production of different cytokines from human peripheral blood mononuclear cells (PMBC), i.e., lymphocytes and macrophages, was tested in vitro. Some cultures were activated with lipopolysaccharide (LPS) at time point -3 h and were either left alone (positive control) or exposed to SMF continuously from 0 until 6, 18, or 24 h. The secretion of interleukin IL-6, IL-8, tumor necrosis factor TNF-α, and IL-10 was tested by ELISA. SMF-exposure caused visible morphological changes on macrophages as well as on lymphocytes, and also seemed to be toxic to lymphocytes ([36.58; 41.52]%, 0.308≤p≤0.444), but not to macrophages (<1.43%, p≥0.987). Analysis of concentrations showed a significantly reduced production of pro-inflammatory cytokines IL-6, IL-8, and TNF-α from macrophages compared to negative control ([56.78; 87.52]%, p = 0.031) and IL-6 compared to positive control ([45.15; 56.03]%, p = 0.035). The production of anti-inflammatory cytokine IL-10 from macrophages and from lymphocytes was enhanced compared to negative control, significantly from lymphocytes ([-183.62; -28.75]%, p = 0.042). The secretion of IL-6 from lymphocytes was significantly decreased compared to positive control ([-115.15; -26.84]%, p = 0.039). This massive in vitro evidence supports the hypotheses that SMF-exposure (i) is harmful to lymphocytes in itself, (ii) suppresses the release of pro-inflammatory cytokines IL-6, IL-8, and TNF-α, and (iii) assists the production of anti-inflammatory cytokine IL-10; thus providing a background mechanism of the earlier in vivo demonstrated anti-inflammatory effects of SMF-exposure. © 2013 Vergallo et al. Source
Identification and characterization of the new designer drug 4'-methylethcathinone (4-MEC) and elaboration of a novel liquid chromatography-tandem mass spectrometry (LC-MS/MS) screening method for seven different methcathinone analogs
Jankovics P.,National Institute of Pharmacy |
Varadi A.,Semmelweis University |
Tolgyesi L.,Eotvos Lorand University |
Tolgyesi L.,Kromat Ltd. Co. |
And 3 more authors.
Forensic Science International | Year: 2011
A fast and simple LC-MS/MS method was developed for screening mephedrone, butylone, methylenedioxypyrovalerone (MDPV), flephedrone, methylone and methedrone in bulk powder samples. Samples were separated on a reverse phase column using gradient elution with mixtures of water, acetonitrile and formic acid. After optimization a limit of detection of about 2ngmL-1 was achieved using multiple reaction monitoring (MRM) mode. Total run time was less than 8min. Typical fragmentation characteristics of the studied compounds are discussed. The method was successfully applied to several unknown bulk powder samples seized by the Hungarian Customs and Finance Guard. One of the samples contained the new designer drug 4'-methylethcathinone (4-MEC), which was identified and characterized by LC-MS/MS, NMR, FT-IR and LC-TOF-MS techniques. The method is also deemed to be applicable for the screening of simple dosage forms such as tablets and capsules. © 2011 Elsevier Ireland Ltd. Source