• MeSH
• DNA sondy * MeSH
• fibroblasty chemie   MeSH
• geny * MeSH
• glutathiontransferasa genetika   MeSH
• hybridizace nukleových kyselin MeSH
• játra MeSH
• kostní dřeň chemie   MeSH
• krysa rodu Rattus MeSH
• mapování chromozomů * metody   MeSH
• metafáze MeSH
• potkani inbrední BN MeSH
• zvířata MeSH
• Check Tag
• krysa rodu Rattus MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• DNA sondy * MeSH
• glutathiontransferasa MeSH

OBJECTIVE: To find out whether the serum PCB level depends on genetic polymorphism in the area of GSTs genes. MATERIAL AND METHODS: In the group of 147 men (112 with an average age of 59.1 ± 10.1 and serum PCB level > 1,000 ng/ g lipid - PCB1, and 35 with an average age of 56.2 ± 12.9 and serum PCB level < 700 ng/ g lipid - PCB2), the PCR RLFP analysis of DNA was used to determine the genetic polymorphism in the area of GSTs genes. RESULTS: As regards PCB, an association was found between serum PCB concentrations and the null genotype of GSTT1 gene. Men above the median PCB levels displayed, with significantly greater frequency, the null genotype GSTT1 compared to men below the median PCB levels, both in the PCB1 set and in the PCB2 set. In the PCB1 set, the presence of the null genotype GSTT1 increased the risk of high PCB levels 11- fold, in the PCB2 set 4- fold (p < 0.001). In the PCB2 set, an association was also discovered between GSTP1 Val/ Val genotype and higher PCB levels. The risk of high PCB levels in the individuals with the Val/ Val genotype was 5- fold higher than in the carriers of the Ile allele (p < 0.001). In neither set was the GSTM1 genotype associated with serum PCB concentrations. CONCLUSION: The association between high PCB levels and the GSTT1 null and GSTP1 Val/ Val suggests that harmful effects depend not only on the intake amounts of PCB but also on the ability of the organism to detoxify these substances. Individuals living in the same environment are therefore at different risks of developing a disease when exposed to PCB. Polymorphism in the area of GSTTl gene (GSTT1 null) could be a potential genetic risk marker.

• MeSH
• dospělí MeSH
• genetické markery MeSH
• glutathion-S-transferasa fí genetika   MeSH
• glutathiontransferasa genetika   MeSH
• látky znečišťující životní prostředí krev   MeSH
• lidé středního věku MeSH
• lidé MeSH
• polychlorované bifenyly krev   MeSH
• polymorfismus genetický * MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• anglický abstrakt MeSH
• časopisecké články MeSH
• Názvy látek
• genetické markery MeSH
• glutathion-S-transferasa fí MeSH
• glutathione S-transferase T1 MeSH Prohlížeč
• glutathiontransferasa MeSH
• látky znečišťující životní prostředí MeSH
• polychlorované bifenyly MeSH

Markers of xenobiotic metabolization (cytochrome P450, ethoxyresorufin-O-deethylase, glutathione and glutathione-S-transferase) were investigated in the liver of the common carp Cyprinus carpio after 28-day exposure to different pesticide formulations.The fish exposed to herbicide Sencor 70 WG (metribuzin 700 g/kg) of 0.25 and 2.5 mg/l showed no change in cytochrome P450 and activity of ethoxyresorufin-O-deethylase when compared to control.Successor 600 (pethoxamid 600 g/l) of 0.06; 0.22 and 0.60 mg/l did not affect either cytochrome P450 or the activity of ethoxyresorufin-O-deethylase. However, in fish exposed to Successor 600 of 0.22 and 0.60 mg/l, there was a rise in glutathione and in the activity of glutathione-S-transferase (p<0.05), with Spearman's correlation r = 0.23 at p<0.05.Spartakus (prochloraz 450 g/l) of 0.36 and 1.08 mg/l induced cytochrome P450 and ethoxyresorufin-O-deethylase (p<0.05), with Spearman's correlation r=0.49 at p<0.01. Glutathione increased in fish exposed to 1.08 mg/l (p<0.05), the activity of glutathione-S-transferase rose (p<0.05) in all concentrations tested (0.108; 0.36 and 1.08 mg/l). Spearman's correlation between glutathione and GST was r=0.38; p<0.01).The obtained data contribute to a better understanding of detoxification of the selected xenobitics in fish. Although biomarkers of the first phase of metabolization are considered to be more sensitive, our results indicate higher sensitivity of the second phase biomarkers.

• Klíčová slova
• CYP, EROD, GSH, GST, fish,
• Publikační typ
• časopisecké články MeSH

Diapause is a state of arrested development during which insects cope with many external and internal stressful factors. European corn borer, Ostrinia nubilalis, overwinters as a fifth instar freeze-tolerant diapausing larva. In order to explore diapause-linked stress tolerance processes, the expression of selected genes coding for stress-related proteins-glutathione S-transferase (Gst), thioredoxin (Trx), glutaredoxin (Grx), ferritin (Fer), metallothionein (Mtn), and heat shock proteins Hsp90, Hsc70, Hsp20.4, and Hsp20.1-was assessed in the fat body of diapause-destined, warm (22 °C) and cold (5 °C) acclimated diapausing larvae using the quantitative real-time PCR. Gene expression was normalised to mRNA transcripts for Actin and Rps03, and relative expression was calculated using non-diapausing larvae as a control group. During the initiation phase of diapause, the abundance of mRNA transcripts of Grx, Hsp90, Hsc70, and Hsp20.1 was significantly upregulated, Trx, Fer, Mtn, and Hsp20.1 were unchanged, while only Gst was clearly downregulated in comparison to non-diapause control. Later, in the early phase of diapause, the expression of most genes (except Trx and Hsp20.1) was upregulated in warm-acclimated larvae, while only Trx and Hsp90 were upregulated in cold-acclimated larvae. Furthermore, the relative expression of all genes (except Trx) increased gradually throughout the diapause in cold-acclimated larvae. This result indicates that the half-life of mRNAs is prolonged during diapause at low temperature, which may lead to a gradual accumulation of mRNA transcripts. Our results show that both diapause programming and temperatures affect the expression of stress-related genes in Ostrinia nubilalis.

• Klíčová slova
• Ferritin, GST, HSPs, Metallothionein, Redoxin,
• MeSH
• diapauza hmyzu * MeSH
• exprese genu MeSH
• fyziologický stres MeSH
• hmyzí proteiny genetika   MeSH
• larva genetika   metabolismus   MeSH
• Lepidoptera klasifikace   genetika   růst a vývoj   metabolismus   MeSH
• messenger RNA metabolismus   MeSH
• proteiny a peptidy chladového šoku genetika   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• hmyzí proteiny MeSH
• messenger RNA MeSH
• proteiny a peptidy chladového šoku MeSH

The need for assessment of aquatic ecosystem contamination and of its impact on water dwelling organisms was developed in response to rising aquatic environmental pollution. In this field study, liver enzymes of phase I and phase II of xenobiotic transformation, namely cytochrome P450, ethoxyresorufin-O-deethylase, glutathione-S-transferase and tripeptide glutathione were used to assess the contamination of the aquatic environment at different rivers in the Czech Republic. The indicator species selected was the male chub (Leuciscus cephalus L.) and male brown trout (Salmo trutta fario). Chemical analyses included also the assessment of the most important inductors of previously mentioned biochemical markers. The major inductors of monitored biomarkers are industrial contaminants which belong to a large group of organic pollutants (PCB, PAH, PCDD/F, DDT, HCH, HCB and OCS), persistent in the environment. Four different groups of river basins were assessed: the River Tichá Orlice and its tributary the Kralický brook; important tributaries of the River Elbe (the rivers Orlice, Chrudimka, Cidlina, Jizera, Vltava, Ohře and Bílina); major rivers in the Czech Republic (the rivers Lužnice, Otava, Sázava, Berounka, Vltava, Labe, Ohře, Svratka, Dyje, Morava and Odra) and the River Vltava. The use of the biochemical markers together with chemical analyses seems to be an effective way to monitor the quality of aquatic environment.

• Klíčová slova
• EROD, GSH, GST, cytochrome P450, river pollution,
• Publikační typ
• časopisecké články MeSH

We studied malignant melanoma cell line Me45 and human ovarian carcinoma cell line SKOV-3 (resistant to cisplatin, adriamycin and diphtheria toxin), assessing their expression level of p53, HSP70 and glutathione S-transferase GST-π before and after chemotherapy with cisplatin. These proteins may be responsible for the occurrence of chemoresistance in cancer patients. To assess protein expression we used the immunocytochemical Avidin-Biotin-peroxidase Complex (ABC) method. Before application of chemotherapy, proteins p53, HSP70 and GST-π were present in 100 % of the examined melanoma cells. After the treatment, the intensity of the immunocytochemical reaction for p53 increased, whereas the intensity of immunocytochemical staining for HSP70 and GST-π decreased. In SKOV-3 cells, p53 and HSP70 were present in 100 % of the examined cells both prior to chemotherapy and after it. However, the intensity of the immunocytochemical reaction for p53 decreased, while that of HSP70 increased. As regards GST-π, only 5 % of all examined SKOV-3 cells revealed its expression before chemotherapy. Incubation with cisplatin caused an elevation in the number of ovarian cancer cells expressing GST-π up to 50 %. Moreover, the intensity of the immunocytochemical reaction for GST-π significantly increased.

• MeSH
• chemorezistence genetika   MeSH
• cisplatina farmakologie   MeSH
• glutathion-S-transferasa fí genetika   MeSH
• imunohistochemie MeSH
• lidé MeSH
• melanom genetika   patofyziologie   MeSH
• nádorové buněčné linie MeSH
• nádorový supresorový protein p53 genetika   MeSH
• nádory vaječníků genetika   patofyziologie   MeSH
• proteiny tepelného šoku HSP70 genetika   MeSH
• protinádorové látky farmakologie   MeSH
• regulace genové exprese u nádorů účinky léků   MeSH
• techniky in vitro MeSH
• Check Tag
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• cisplatina MeSH
• glutathion-S-transferasa fí MeSH
• nádorový supresorový protein p53 MeSH
• proteiny tepelného šoku HSP70 MeSH
• protinádorové látky MeSH

DNA methylation, one of the most studied epigenetic mechanisms, when present in the promoter region of genes, causes inhibition of gene expression, and conversely, hypomethylation of these regions enables gene expression. DNA methylation is susceptible to nutritional and environmental influences, and undesirable alterations in methylation patterns manifested in changes in the expression of relevant genes can lead to pathological consequences. In the present work, we studied the methylation status of the bovine GSTP1 gene under the influence of pesticide Mospilan 20SP alone and in combination with pesticide Orius 25EW in in vitro proliferating bovine lymphocytes. We employed methylation-specific PCR, and when studying the effect of pesticide combinations, we also used its real-time version followed by a melting procedure. Our results showed that Mospilan 20SP alone at 5, 25, 50, and 100 µg.ml-1 and 5, 10, 25, and 50 µg.ml-1 for the last 4 and 24 hours of culture with in vitro proliferating bovine lymphocytes, respectively, did not induce methylation of the bovine GSTP1 gene. The same results were revealed when studying the effect of the combination of the pesticides added to the lymphocyte cultures for the last 24 hours of cultivation in the following amounts: 1.25, 2.5, 5, 10, and 25 µg.ml-1 of Mospilan 20SP and 1.5, 3, 6, 15, and 30 µg.ml-1 of Orius 25EW. We have also revealed that the less laborious real-time MSP followed by a melting procedure may replace MSP for studying the methylation status of the GSTP1 gene.

• Klíčová slova
• Bos taurus, DNA methylation, GSTP1, acetamiprid, methylation-specific PCR, tebuconazole,
• MeSH
• epigeneze genetická MeSH
• glutathion-S-transferasa fí * genetika   MeSH
• metylace DNA genetika   MeSH
• pesticidy * farmakologie   MeSH
• promotorové oblasti (genetika) genetika   MeSH
• skot MeSH
• zvířata MeSH
• Check Tag
• skot MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• glutathion-S-transferasa fí * MeSH
• pesticidy * MeSH

BACKGROUND: Central Europe presents with the highest incidence of sporadic colorectal cancer (CRC) worldwide. As sporadic CRC represents a typical multifactorial disease, it is characterized by intense interaction of the genetic background with the environment. Glutathione S-transferases could act as attractive susceptibility genes for CRC, as they are directly involved in conjugation between glutathione and chemotherapeutics, environmental pollutants and a wide spectrum of xenobiotics. METHODS: In this study, we investigated associations of polymorphisms in glutathione S-transferases (GSTs) genes, that is GSTA1, GSTT1, GSTM1 and GSTP1, with CRC in a total of 197 cases and 218 controls originating from the Czech Central European population. Polymorphisms were assessed by polymerase chain reaction/restriction fragment length polymorphism-based methods, allele-specific multiplex and allelic discrimination by real-time polymerase chain reaction. RESULTS: None of investigated polymorphisms showed any associations with CRC, with the exception of GSTP1; where the heterozygote genotype Ile105Val was associated with decreased risk of CRC (P = 0.043). CONCLUSIONS: The frequencies observed in our study are in accordance with those from other European Caucasian populations. Based on our studies, examined variability in GST genes is not a major determinant of CRC susceptibility in the Central European population.

• MeSH
• alely MeSH
• běloši genetika   MeSH
• dospělí MeSH
• frekvence genu MeSH
• genetická predispozice k nemoci MeSH
• genetické asociační studie MeSH
• genetické testování metody   MeSH
• glutathion-S-transferasa fí genetika   MeSH
• glutathiontransferasa genetika   MeSH
• incidence MeSH
• interakce genů a prostředí MeSH
• kolorektální nádory enzymologie   epidemiologie   genetika   MeSH
• kvantitativní polymerázová řetězová reakce MeSH
• lidé středního věku MeSH
• lidé MeSH
• náchylnost k nemoci enzymologie   MeSH
• polymorfismus délky restrikčních fragmentů MeSH
• polymorfismus genetický * MeSH
• rizikové faktory MeSH
• senioři MeSH
• studie případů a kontrol MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Česká republika epidemiologie   MeSH
• Názvy látek
• glutathion-S-transferasa fí MeSH
• glutathione S-transferase M1 MeSH Prohlížeč
• glutathione S-transferase T1 MeSH Prohlížeč
• glutathiontransferasa MeSH
• GSTA1 protein, human MeSH Prohlížeč
• GSTP1 protein, human MeSH Prohlížeč

Now-a-days, the occurrence of antidepressant residues in surface waters has become a major concern. Amitriptyline (AMI) has been described to treat depression and other disorders for decades. However, little is known about its effect on non-target organisms. The aim of this study was to assess the potential impact of AMI on the mRNA expression of antioxidant and detoxification enzymes during the early embryonic development of zebrafish (Danio rerio). Fertilized D. rerio embryos were exposed to AMI at concentrations of 300 ng/L and 30 μg/L and sampled 24, 48, 96, and 144 h post fertilization (hpf) to assess the mRNA expressions of cytochrome P450 1A1, glutathione-S-transferase, glutathione peroxidase, superoxide dismutase, and catalase. The time courses of the mRNA expressions of antioxidant and detoxification enzymes revealed characteristic changes during embryonic development causing generally transient changes post hatching; however, AMI did not cause any significant impact except in the case of CAT after 144 h, which was significantly upregulated by the AMI concentration of 30 μg/L. The results suggest that the antidepressant AMI causes only moderate to minor impacts on antioxidant and detoxification enzymes during early embryonic development of the non-target organism D. rerio and that CAT is the only biomarker affected by AMI.

• Klíčová slova
• CAT, CYP1A, Fish, GPx, GST, SOD,
• MeSH
• amitriptylin farmakologie   terapeutické užití   MeSH
• antidepresiva tricyklická farmakologie   terapeutické užití   MeSH
• antioxidancia metabolismus   MeSH
• dánio pruhované MeSH
• embryo nesavčí účinky léků   metabolismus   MeSH
• embryonální vývoj účinky léků   MeSH
• messenger RNA metabolismus   MeSH
• oxidační stres účinky léků   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• amitriptylin MeSH
• antidepresiva tricyklická MeSH
• antioxidancia MeSH
• messenger RNA MeSH

• MeSH
• glutathion-S-transferasa fí genetika   MeSH
• glutathiontransferasa genetika   MeSH
• látky znečišťující životní prostředí krev   MeSH
• lidé MeSH
• polychlorované bifenyly krev   MeSH
• polymorfismus genetický * MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• komentáře MeSH
• úvodníky MeSH
• Názvy látek
• glutathion-S-transferasa fí MeSH
• glutathione S-transferase T1 MeSH Prohlížeč
• glutathiontransferasa MeSH
• látky znečišťující životní prostředí MeSH
• polychlorované bifenyly MeSH