AIMS: Authors studied potential side effects of fetal calf serum (FCS) in cultivation media on human dental pulp stem cells (DPSC) during long-term cultivation. METHODS: Two lines of DPSC obtained healthy donors (male 22 years, female 23 years) were used. Both lines were cultivated under standard cultivation conditions in four different media containing 10% or 2% FCS and substituted with growth factors. During long-term cultivation proliferation ability, karyotype and phenotype of DPSC were measured. RESULTS: Both lines of DPSC cultivated in a media containing 2% FCS and ITS supplement showed the highest number of population doublings. On the other hand the proliferation rate of DPSC cultivated in a media with 2% FCS without ITS supplement was slowest. Proliferation rate of DPSC cultivated in 10% FCS media with or without FGF-2 was comparable. DPSC cultivated in a media with 10% FCS showed a significantly higher amount of chromosomal aberrations. These chromosomal aberrations do not seem to be clonal but surprisingly we found large amounts of tetraploid cells in the 9th passage in both media containing 10% FCS. CONCLUSIONS: Our study proved that cultivation of DPSC in media containing higher concentration of FCS has critical side effects on cell chromosomal stability. and J. Suchánek, TS. Kleplová, M. Kapitán, T. Soukup
The aim of this study was to determine the prevalence of musculoskeletal problems among Czech dentists and to analyze the factors that affect these disorders. Information was gathered through questionnaire completed by 581 physicians. The questionnaire ascertained general information about physicians including their work habits and the characteristics of their work environment along with the occurrence of musculoskeletal problems as well as their intensity. In the past year the occurrence of at least mild difficulties associated with the locomotive system was reported by 96.9% of dentists surveyed (n = 557), with 66.3% of respondents (n = 381) reporting difficulties ofa moderate or major nature. Most respondents of both sexes indicated neck pain. A statistically significant correlation with the occurrence of musculoskeletal complaints of medium and major intensity was demonstrated for the following factors: sex, age, running a private practice, past injury or musculoskeletal diseases, and the perception of work as psychologically demanding. Musculoskeletal disorders in dentists in Czech Republic are relatively frequent and serious health problem. The causes of these diseases must be identified and appropriate preventive interventions undertaken that will contribute to a reduction in the incidence of these problems. and Z. Sustová, L. Hodacová, M. Kapitán
Melanocytární léze vykazují značnou morfologickou heterogenitu. Jejich diagnostika je náročná i přes současné využití moderních histopatologických a imunohistochemických metod. Významným přínosem v diagnostice melanocytárních lézí je zavedení molekulárně genetické metody fluorescenční in situ hybridizace s použitím čtyřbarevné sondy značící geny CCND1, RREB1, MYB a centromeru chromozomu 6. V letech 2008–2012 bylo v naší laboratoři úspěšně metodou fluorescenční in situ hybridizace vyšetřeno 160 vzorků různých typů melanocytárních lézí, 44 névů a 116 melanomů. Změny asociované s diagnózou melanomu byly prokázány u 116 vzorků (72,5 %), normální nález u 41 vzorků (25,6 %), ve dvou případech bylo rozhodnutí na hranici hodnotitelnosti metody (1,2 %) a v jednom případě se jednalo o vyšetření recidivy melanomu v jizvě, který byl svým nálezem atypický (monozomie chromozomu 6) (0,6 %). Na základě dosažených výsledků byla stanovena senzitivita metody 96,6 % a specifita metody 91%. Tyto výsledky ukazují, že fluorescenční in situ hybridizace je vhodnou metodou pro zajištění přesné a rychlé diagnostiky nejednoznačných melanocytárních lézí. Právě rychlost a správnost diagnózy je u vysoce maligních melanomů zásadní a má neoddiskutovatelný vliv na prognózu a úspěšnost léčby pacienta., Melanocytic lesions exhibit significant morphological heterogenity, making their diagnosis difficult, although both sophisticated histopathological and immunohistochemical methods are used. The introduction of molecular genetic method flourescence in situ hybridization (FISH) has contributed significantly to the diagnosing of melanocytic lesions. Between 2008 and 2012, we studied a total of 160 samples of different types of melanocytic lesions, including 44 nevi and 116 melanomas, using a four-color probe mix for CCND1, RREB1 and MYB genes and for the centromere of chromosome 6. A positive result was found in 116 melenoma samples (72.5 %) and a negative result in 41 samples (25.6 %). A borderline value was found in two samples (1.2 %), and an atypical finding (monosomy of chromosome 6) was seen in a melanoma recurrence in one case (0.6 %). Sensitivity and specificity were 96.6 % and 91 %, respectively. These results show that FISH is a suitable and relatively low-cost method for accurate, rapid diagnosis of ambiguous melanocytic lesions. The speed and accuracy of diagnosis of highly malignant melanomas are crucial and have great impact on the prognosis and success of a patient‘s treatment., Jana Dvořáčková, Jana Žmolíková, Jan Mužík, Magdalena Uvírová, and Literatura