Cílem naší práce bylo přispět k hodnocení zdravotního rizika kombinované inhalační a dermální expozice PAU u osob pracujících v oboru silniční stavitelství. V rámci hodnocení expoziční cesty bylo v pracovním ovzduší a na kůži exponovaných osob stanoveno 15 vybraných PAU. Zhodnocení genotoxické expozice (chromozomové aberace periferních lymfocytů) bylo provedeno před/po sezoně (jaro/podzim) vždy jednorázovým odběrem krve. Skupina pracovníků v oboru silniční stavitelství byla inhalačně exponována PAU na hladinách výrazně nižších, než jsou pracovní limity v České republice. Rovněž dle hodnocení World Health Organization (WHO) lze námi zjištěnou inhalační expozici benzo(a) pyrenu považovat za přijatelnou. Dermální expozice byla na nízké úrovni. Nalezli jsme významný nárůst chromozomových aberací periferních lymfocytů po sezoně. Tento nález však byl stále v mezích normálních hodnot. Genotoxické riziko lze považovat za nízké., The aim of our study was to contribute to the evaluation of health risk assessments of combined inhalation and dermal exposure to PAHs amongst road construction crews. Within the framework of evaluating inhalation and dermal exposure of persons there have been determined 15 selected PAHs. Assessments of genotoxic exposure (chromosomal aberrations of peripheral lymphocytes) were performed in the spring and autumn seasons with single blood samples in each case. Road construction crews were exposed to inhaled PAHs at levels significantly lower than those stipulated by work limits in the Czech Republic. According to the World Health Organization (WHO) assessment, the detected inhalation exposure to benzo(a) pyrene is also acceptable. Dermal exposure was low. We detected a significant increase in chromosomal aberrations of peripheral lymphocytes post season. This finding, however, did not exceed limit values. Genotoxic risk can be considered to be low., Diana Ranná, Lenka Borská, Jindra Šmejkalová, Lenka Kotingová, Jan Kremláček, Hana Tamchynová, and Literatura 28
Regulatory T cells (Treg) are a specialized subpopulation of T cells that act to suppress inadequate immune response. Psoriasis is recognized as a T -cell driven immune-mediated systemic inflammatory disease with skin manifestation. Effective therapeutical approach to treat psoriasis is Goeckerman therapy (GT ). The aim of this study was to compare the number of Treg in the peripheral blood of 27 psoriatic patients and 19 controls and to evaluate the influence of GT on Treg population in peripheral blood of patients with psoriasis. There was no significant difference in the relative number of Treg cells in the peripheral blood of healthy blood donors and patients with psoriasis before initiation of GT (P = 0.2668). In contrary, the relative number of Treg cells in peripheral blood of patients with psoriasis after GT was significantly higher than those found in healthy blood donors (P = 0.0019). Moreover, the relative number of Treg is significantly increased in psoriatic patients after Goeckerman therapy compared to the pre-treatment level (P = 0.0042). In conclusion, this significant increase in Treg count after GT is probably associated with amelioration of inflammation by GT , as disease activity expressed as PASI decreased in our patients by GT (P = 0.0001)., Kateřina Kondělková, Doris Vokurková, Jan Krejsek, Lenka Borská, Zdeněk Fiala, Květa Hamáková, Ctirad Andrýs, and Literatura 39