National Repository of Grey Literature 9 records found  Search took 0.00 seconds. 
The effect of air pollution on oxidative stress markers in newborns
Ambrož, Antonín ; Rössner, Pavel (advisor) ; Rubeš, Jiří (referee) ; Gábelová, Alena (referee)
In everyday life, humans are exposed to toxic substances of anthropogenic origin. These substances can also be found in the ambient air and their impact poses a long-term risk for human health. Respirable particulate matter (PM) of aerodynamic diameter < 2.5 µm (PM2.5) is intensively studied, along with carcinogenic polycyclic aromatic hydrocarbons (PAHs), bound to it, such as benzo[a]pyrene (B[a]P), a reference carcinogenic PAH. Owing to small size, PM2.5 can penetrate the human body primarily via the airways and represent an increased health risk compared to larger particles. The negative health impacts of anthropogenic PM2.5, generated e.g. by fossil fuel combustion, are linked with its small size, relatively large surface, as well as with PAHs and other substances adsorbed on PM surface. PAHs, generated by an incomplete combustion of organic matter, can enter organism either via ingestion of contaminated food, water or via inhalation of polluted air. PAHs affect organisms via genotoxic, mutagenic, carcinogenic, embryotoxic and other adverse effects. One of the common denominators of these effects is oxidative stress, which is also considered to be the main mechanism of action caused by PM in the human organism. Oxidative damage induced by reactive oxygen species (ROS) may affect any cellular...
Regulation of gene expression of HSP70 genes and its dependence on the genotype of HSP70 genes.
Ambrož, Antonín ; Novota, Peter (advisor) ; Kotrbová - Kozak, Anna Katarzyna (referee)
The topic of the presented thesis is the regulation of gene expression level of the three HSP70 genes in mononuclear cells. We investigated the dependence of expression regulation (induction) abiliy on selected point mutations, so-called SNPs (single nucleotide polymorphism) in the observed genes. The mononuclear cells were obtained from peripheral blood samples of healthy individuals. In order to analyze their gene expression, we selected individuals who were homozygous for at least one of the monitored point mutations. Taking into account the chosen criteria for healthy individuals we based on interviews with these individuals and their personal history. We determined the polymorphisms observed in two cell stress-inducible HSP70-1 (HSPA1A) and HSP70-2 (HSPA1B) genes and in one constitutively expressed gene HSP70-Hom (HSPA1L). Further, we have analyzed HSP70s gene expression regulation and the relation between the expression regulation and studied polymorphisms. We determined the degree of regulation of a gene expression in the studied genes in relation to two SNPs -110A/C (rs1008438), +190G /C (rs1043618) gene HSP70-1, and two SNPs +1267A/G (rs1061581), +2074G /C (rs539689 ) of the HSP70-2 gene, and the mutation of one five-nucleotide (rs9281590) HSP70-2 gene, and one SNP +2437T/C (rs2227956) of...
The effect of air pollution on oxidative stress markers in newborns
Ambrož, Antonín
In everyday life, humans are exposed to toxic substances of anthropogenic origin. These substances can also be found in the ambient air and their impact poses a long-term risk for human health. Respirable particulate matter (PM) of aerodynamic diameter < 2.5 µm (PM2.5) is intensively studied, along with carcinogenic polycyclic aromatic hydrocarbons (PAHs), bound to it, such as benzo[a]pyrene (B[a]P), a reference carcinogenic PAH. Owing to small size, PM2.5 can penetrate the human body primarily via the airways and represent an increased health risk compared to larger particles. The negative health impacts of anthropogenic PM2.5, generated e.g. by fossil fuel combustion, are linked with its small size, relatively large surface, as well as with PAHs and other substances adsorbed on PM surface. PAHs, generated by an incomplete combustion of organic matter, can enter organism either via ingestion of contaminated food, water or via inhalation of polluted air. PAHs affect organisms via genotoxic, mutagenic, carcinogenic, embryotoxic and other adverse effects. One of the common denominators of these effects is oxidative stress, which is also considered to be the main mechanism of action caused by PM in the human organism. Oxidative damage induced by reactive oxygen species (ROS) may affect any cellular...
The effect of air pollution on oxidative stress markers in newborns
Ambrož, Antonín
In everyday life, humans are exposed to toxic substances of anthropogenic origin. These substances can also be found in the ambient air and their impact poses a long-term risk for human health. Respirable particulate matter (PM) of aerodynamic diameter < 2.5 µm (PM2.5) is intensively studied, along with carcinogenic polycyclic aromatic hydrocarbons (PAHs), bound to it, such as benzo[a]pyrene (B[a]P), a reference carcinogenic PAH. Owing to small size, PM2.5 can penetrate the human body primarily via the airways and represent an increased health risk compared to larger particles. The negative health impacts of anthropogenic PM2.5, generated e.g. by fossil fuel combustion, are linked with its small size, relatively large surface, as well as with PAHs and other substances adsorbed on PM surface. PAHs, generated by an incomplete combustion of organic matter, can enter organism either via ingestion of contaminated food, water or via inhalation of polluted air. PAHs affect organisms via genotoxic, mutagenic, carcinogenic, embryotoxic and other adverse effects. One of the common denominators of these effects is oxidative stress, which is also considered to be the main mechanism of action caused by PM in the human organism. Oxidative damage induced by reactive oxygen species (ROS) may affect any cellular...
The effect of air pollution on oxidative stress markers in newborns
Ambrož, Antonín ; Rössner, Pavel (advisor) ; Rubeš, Jiří (referee) ; Gábelová, Alena (referee)
In everyday life, humans are exposed to toxic substances of anthropogenic origin. These substances can also be found in the ambient air and their impact poses a long-term risk for human health. Respirable particulate matter (PM) of aerodynamic diameter < 2.5 µm (PM2.5) is intensively studied, along with carcinogenic polycyclic aromatic hydrocarbons (PAHs), bound to it, such as benzo[a]pyrene (B[a]P), a reference carcinogenic PAH. Owing to small size, PM2.5 can penetrate the human body primarily via the airways and represent an increased health risk compared to larger particles. The negative health impacts of anthropogenic PM2.5, generated e.g. by fossil fuel combustion, are linked with its small size, relatively large surface, as well as with PAHs and other substances adsorbed on PM surface. PAHs, generated by an incomplete combustion of organic matter, can enter organism either via ingestion of contaminated food, water or via inhalation of polluted air. PAHs affect organisms via genotoxic, mutagenic, carcinogenic, embryotoxic and other adverse effects. One of the common denominators of these effects is oxidative stress, which is also considered to be the main mechanism of action caused by PM in the human organism. Oxidative damage induced by reactive oxygen species (ROS) may affect any cellular...
GENE EXPRESSION AND IMMUNOLOGICAL RESPONSE IN MICE EXPOSED TO ZnO NANOPARTICLES
Rössner ml., Pavel ; Vrbová, Kristýna ; Strapáčová, S. ; Rössnerová, Andrea ; Ambrož, Antonín ; Brzicová, Táňa ; Líbalová, Helena ; Javorková, Eliška ; Zajícová, Alena ; Holáň, Vladimír ; Kulich, P. ; Večeřa, Zbyněk ; Mikuška, Pavel ; Coufalík, Pavel ; Křůmal, Kamil ; Čapka, Lukáš ; Dočekal, Bohumil ; Šerý, Omar ; Machala, M. ; Topinka, Jan
We analyzed gene expression changes in the lungs and the immunological response in splenocytes of mice exposed by inhalation of ZnO nanoparticles - NP. Adult female ICR mice were treated for three days and three months, respectively. Analysis of differential expression in genes involved in oxidative stress was conducted using quantitative RT-PCR. The potential immunotoxic and immunomodulatory effects of ZnO NP were analyzed by phenotyping and cytokine production by splenocytes after three months exposure. Three days exposure resulted in down-regulation of GCLC, GSR, HMOX-1, NQO-1, NF-kB2, PTGS2 and TXNRD1 mRNA expression, three months exposure increased the expression of these genes. Three months exposure caused a significant decrease in the percentage of granulocytes in the spleen cells, and affected the production of IL-10 and IL-6 by lipopolysaccharide-stimulated leukocytes. In summary, our study revealed changes in the expression of genes involved in the oxidative stress response following acute ZnO NP exposure. Subchronic ZnO NP exposure induced immunomodulatory effects in the spleen.
Regulation of gene expression of HSP70 genes and its dependence on the genotype of HSP70 genes.
Ambrož, Antonín ; Novota, Peter (advisor) ; Kotrbová - Kozak, Anna Katarzyna (referee)
The topic of the presented thesis is the regulation of gene expression level of the three HSP70 genes in mononuclear cells. We investigated the dependence of expression regulation (induction) abiliy on selected point mutations, so-called SNPs (single nucleotide polymorphism) in the observed genes. The mononuclear cells were obtained from peripheral blood samples of healthy individuals. In order to analyze their gene expression, we selected individuals who were homozygous for at least one of the monitored point mutations. Taking into account the chosen criteria for healthy individuals we based on interviews with these individuals and their personal history. We determined the polymorphisms observed in two cell stress-inducible HSP70-1 (HSPA1A) and HSP70-2 (HSPA1B) genes and in one constitutively expressed gene HSP70-Hom (HSPA1L). Further, we have analyzed HSP70s gene expression regulation and the relation between the expression regulation and studied polymorphisms. We determined the degree of regulation of a gene expression in the studied genes in relation to two SNPs -110A/C (rs1008438), +190G /C (rs1043618) gene HSP70-1, and two SNPs +1267A/G (rs1061581), +2074G /C (rs539689 ) of the HSP70-2 gene, and the mutation of one five-nucleotide (rs9281590) HSP70-2 gene, and one SNP +2437T/C (rs2227956) of...

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