Time filter

Source Type

Brno, Czech Republic

Lysak D.,Charles University | Holubova M.,Charles University | Bergerova T.,Charles University | Vavrova M.,R.O.S.A. | And 5 more authors.
Cell and Tissue Banking | Year: 2015

Cell therapy products represent a new trend of treatment in the field of immunotherapy and regenerative medicine. Their biological nature and multistep preparation procedure require the application of complex release criteria and quality control. Microbial contamination of cell therapy products is a potential source of morbidity in recipients. The automated blood culture systems are widely used for the detection of microorganisms in cell therapy products. However the standard 2-week cultivation period is too long for some cell-based treatments and alternative methods have to be devised. We tried to verify whether a shortened cultivation of the supernatant from the mesenchymal stem cell (MSC) culture obtained 2 days before the cell harvest could sufficiently detect microbial growth and allow the release of MSC for clinical application. We compared the standard Ph. Eur. cultivation method and the automated blood culture system BACTEC (Becton Dickinson). The time to detection (TTD) and the detection limit were analyzed for three bacterial and two fungal strains. The Staphylococcus aureus and Pseudomonas aeruginosa were recognized within 24 h with both methods (detection limit ~10 CFU). The time required for the detection of Bacillus subtilis was shorter with the automated method (TTD 10.3 vs. 60 h for 10–100 CFU). The BACTEC system reached significantly shorter times to the detection of Candida albicans and Aspergillus brasiliensis growth compared to the classical method (15.5 vs. 48 and 31.5 vs. 48 h, respectively; 10–100 CFU). The positivity was demonstrated within 48 h in all bottles, regardless of the size of the inoculum. This study validated the automated cultivation system as a method able to detect all tested microorganisms within a 48-h period with a detection limit of ~10 CFU. Only in case of B. subtilis, the lowest inoculum (~10 CFU) was not recognized. The 2-day cultivation technique is then capable of confirming the microbiological safety of MSC and allows their timely release for clinical application. © 2015 Springer Science+Business Media Dordrecht

Chmelikova M.,Masaryk University | Pacal L.,Masaryk University | Spinarova L.,St Anne iversity Hospital | Vasku A.,Masaryk University
Biomedical Papers | Year: 2015

Aims. The aim of this study was to investigate the relationship between selected symptoms of chronic heart failure (myocardial infarction, plasma cholesterol level) and single nucleotide polymorphisms (SNPs) in the FAAH and CNR1 genes. Methods. A case – control study involving 155 patients with chronic heart failure and 169 age- and sex-matched healthy subjects. We detected SNPs 385 C/A (rs324420) in the FAAH and 1359 G/A (rs1049353) in the CNR1 genes using the polymerase chain reaction and restriction analysis. Genotype and allele frequencies were compared between patients and controls as well as between patients with and without myocardial infarction. Results. No significant differences in genotype or allelic frequencies between patients and controls were found (P > 0.05). Carriers of the FAAH A allele had a 2.37-fold increase in the risk of myocardial infarction (odds ratio 2.37, 95% confidence interval 1.36-6.93, P = 0.01). Homozygous carriers of genotype AA of CNR1 SNP 1359 had significantly higher plasma cholesterol levels than carriers of GG and GA genotypes in patients (P = 0.04). Conclusions. The study results suggest a role for allele A of the FAAH 385 variant as a risk factor for myocardial infarction. Genotype AA of CNR1 1359 variant probably affects plasma cholesterol levels. Pharmacological intervention in this system could modify the therapeutic approach to certain cardiovascular disorders. © 2015, PALACKY UNIV. All rights reserved.

Cifkova R.,Charles University | Cifkova R.,St Anne iversity Hospital | Fodor G.,University of Ottawa | Wohlfahrt P.,Charles University | Wohlfahrt P.,St Anne iversity Hospital
Current Hypertension Reports | Year: 2016

The aim of this paper was to critically evaluate recent publications on hypertension treatment and control in regions by income. Prevalence of hypertension is increasing worldwide, most prominently in low-income countries. Awareness, treatment, and control are most successful in North America while remaining a challenge in middle- and low-income countries. Easy access to medical care and aggressive use of pharmacotherapy are the key strategies which have proved to be successful in reducing the burden of hypertension on the population level. © 2016, Springer Science+Business Media New York.

Meluzin J.,St Anne iversity Hospital | Meluzin J.,Masaryk University | Gregorova Z.,St Anne iversity Hospital | Gregorova Z.,Masaryk University | And 4 more authors.
Biomedical Papers | Year: 2015

Background. A significant proportion of patients with exertional dyspnea require exercise to diagnose heart failure with normal ejection fraction (HFNEF). Methods and Results. In this review article, we evaluate current data on the prevalence, clinical significance and specifically the establishment of a diagnosis of isolated, exercise-induced HFNEF. Despite the unquestioned clinical importance and high prevalence of exercise-induced HFNEF, there are limited and conflicting data on making a diagnosis of exercise-induced HFNEF. This mostly relies on the evidence of exercise-induced elevation in left ventricular filling pressure (LVFP). At present, there is no agreement on the ability of exercise echocardiographic parameteres to predict exercise-induced LVFP elevation. In addition, even invasively measured exercise LVFP faces the problem of defining normal exercise LVFP values. More data and probably new diagnostic approaches are necessary to reliably diagnose exercise HFNEF. Conclusions. There are conflicting results and significant problems associated with the diagnosis of exercise HFNEF. This review hopefully will encourage further research in this difficult but clinically important area of heart failure. © 2015, PALACKY UNIV. All rights reserved.

Novotny T.,Masaryk University | Leinveber P.,St Anne iversity Hospital | Hnatkova K.,Imperial College London | Reichlova T.,St Anne iversity Hospital | And 13 more authors.
Journal of Electrocardiology | Year: 2014

Background: Repolarization processes in female and male are different. This study provided pilot data on automatic measurements of QT intervals in heart transplant (HT) recipients stratified according to the sex of the recipient and the donor. Methods and results: The following groups were analyzed: Group A-20 males with male heart, group B-14 females with male heart, group C-13 females with female heart, group D-11 males with female heart, group E-20 healthy males, and group F-20 healthy females. Twelve-lead electrocardiograms were digitally captured during autonomic provocative test of five postural 8-minute stages-supine, unsupported sitting, supine, unsupported standing, and supine. Fridericia formula was used for heart rate correction together with a generic correction for QT/RR hysteresis. Neither female nor male HT recipients exhibit any differences in QTc interval duration related to the sex of the donor. There was, however, a trend towards longer QTc intervals in female HT recipients compared to male HT recipients irrespective of the sex of the donor. The QTc differences between healthy control females and males were highly statistically significant proving the assay sensitivity of the study. Conclusion: The available pilot data suggest that in HT patients, the sex of the donor has little influence on the QTc interval of the transplanted heart. © 2014 Elsevier Inc. All rights reserved.

Discover hidden collaborations