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Statements

Subject Item
n2:RIV%2F62157124%3A16270%2F11%3A43870600%21RIV12-MSM-16270___
rdf:type
n8:Vysledek skos:Concept
dcterms:description
Wild birds are continually exposed to many anthropogenic and natural stressors in their habitats. Over the last decades, mass mortalities of wild birds constitute a serious problem and may possibly have more causations such as natural toxins including cyanotoxins, parasitic diseases, industrial chemicals and other anthropogenic contaminants. This study brings new knowledge on the effects of controlled exposure to multiple stressors in birds. The aim was to test the hypothesis that influence of cyanobacterial biomass, lead and antigenic load may combine to enhance the effects on birds, including modulation of antioxidative and detoxification responses. Eight treatment groups of model species Japanese quail (Coturnix coturnix japonica) were exposed to various combinations of these stressors. The parameters of detoxification and oxidative stress were studied in liver and heart after 30 days of exposure. The antioxidative enzymatic defense in birds seems to be activated quite efficiently, which was documented by the elevated levels and activities of antioxidative and detoxification compounds and by the low incidence of damage to lipid membranes. The greatest modulations of glutathione level and activities of glutathione-S-transferase, glutathione peroxidase, glutathione reductase, superoxide dismutase, catalase and lipid peroxidation were shown mostly in the groups with combined multiple exposures. The results indicate that the antioxidative system plays an important role in the protective response of the tissues to applied stressors and that its greater induction helps to protect the birds from more serious damage. Most significant changes of these ''defense'' parameters in case of multiple stressors suggest activation of this universal mechanism in situation with complex exposure and its crucial role in protection of the bird health in the environment. Wild birds are continually exposed to many anthropogenic and natural stressors in their habitats. Over the last decades, mass mortalities of wild birds constitute a serious problem and may possibly have more causations such as natural toxins including cyanotoxins, parasitic diseases, industrial chemicals and other anthropogenic contaminants. This study brings new knowledge on the effects of controlled exposure to multiple stressors in birds. The aim was to test the hypothesis that influence of cyanobacterial biomass, lead and antigenic load may combine to enhance the effects on birds, including modulation of antioxidative and detoxification responses. Eight treatment groups of model species Japanese quail (Coturnix coturnix japonica) were exposed to various combinations of these stressors. The parameters of detoxification and oxidative stress were studied in liver and heart after 30 days of exposure. The antioxidative enzymatic defense in birds seems to be activated quite efficiently, which was documented by the elevated levels and activities of antioxidative and detoxification compounds and by the low incidence of damage to lipid membranes. The greatest modulations of glutathione level and activities of glutathione-S-transferase, glutathione peroxidase, glutathione reductase, superoxide dismutase, catalase and lipid peroxidation were shown mostly in the groups with combined multiple exposures. The results indicate that the antioxidative system plays an important role in the protective response of the tissues to applied stressors and that its greater induction helps to protect the birds from more serious damage. Most significant changes of these ''defense'' parameters in case of multiple stressors suggest activation of this universal mechanism in situation with complex exposure and its crucial role in protection of the bird health in the environment.
dcterms:title
Combined exposure of Japanese quails to cyanotoxins, Newcastle virus and lead: Oxidative stress responses Combined exposure of Japanese quails to cyanotoxins, Newcastle virus and lead: Oxidative stress responses
skos:prefLabel
Combined exposure of Japanese quails to cyanotoxins, Newcastle virus and lead: Oxidative stress responses Combined exposure of Japanese quails to cyanotoxins, Newcastle virus and lead: Oxidative stress responses
skos:notation
RIV/62157124:16270/11:43870600!RIV12-MSM-16270___
n8:predkladatel
n17:orjk%3A16270
n3:aktivita
n7:Z
n3:aktivity
Z(MSM6215712402)
n3:cisloPeriodika
7
n3:dodaniDat
n12:2012
n3:domaciTvurceVysledku
n4:6786294 n4:1936468 n4:9847065
n3:druhVysledku
n11:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
190881
n3:idVysledku
RIV/62157124:16270/11:43870600
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Detoxification; Vaccine strain; Lead; Cyanobacteria; Coturnix coturnix japonica; Multiple exposure
n3:klicoveSlovo
n5:Detoxification n5:Cyanobacteria n5:Multiple%20exposure n5:Vaccine%20strain n5:Lead n5:Coturnix%20coturnix%20japonica
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[85DFD1EDBE1B]
n3:nazevZdroje
Ecotoxicology and Environmental Safety
n3:obor
n20:GJ
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
6
n3:rokUplatneniVysledku
n12:2011
n3:svazekPeriodika
74
n3:tvurceVysledku
Pikula, Jiří Hilscherová, Klára Banďouchová, Hana Paskerová, Hana Pašková, Veronika Sedláčková, Jana
n3:wos
000295438000036
n3:zamer
n15:MSM6215712402
s:issn
0147-6513
s:numberOfPages
9
n14:doi
10.1016/j.ecoenv.2011.07.014
n18:organizacniJednotka
16270