Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla)
To investigate whether the stress response of European eels infected with Anguillicola crassus is influenced by environmental pollutants, experimentally infected eels were exposed to Cd and/or to 3,3′, 4,4′, 5-pentachlorobiphenyl (PCB 126). Serum cortisol and glucose concentrations of these eels wer...
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ftdatacite:10.18452/21777 2023-05-15T13:27:36+02:00 Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) Sures, B. Lutz, I. Kloas, W. 2005 https://dx.doi.org/10.18452/21777 https://edoc.hu-berlin.de/handle/18452/22492 unknown Humboldt-Universität zu Berlin stress response cortisol glucose Anguillicola crassus Anguilla anguilla parasites as stressors PCB Cd 610 Medizin und Gesundheit 570 Biowissenschaften; Biologie Text article article-journal ScholarlyArticle 2005 ftdatacite https://doi.org/10.18452/21777 2021-11-05T12:55:41Z To investigate whether the stress response of European eels infected with Anguillicola crassus is influenced by environmental pollutants, experimentally infected eels were exposed to Cd and/or to 3,3′, 4,4′, 5-pentachlorobiphenyl (PCB 126). Serum cortisol and glucose concentrations of these eels were monitored over a period of 103 days and were compared with data from infected, unexposed eels as well as with data from uninfected eels. Additionally, the levels of cortisol were correlated with concentrations of Anguillicola-specific antibodies. All eels showed an initial increase of the cortisol levels until day 63. This general elevation of plasma cortisol is most likely due to handling stress, as all eels were repeatedly netted and afterwards inoculated with a feeding tube. At the end of the exposure period eels which were infected and those which were infected and simultaneously exposed to Cd and PCB showed significantly higher levels than the controls. The general course of serum glucose levels in eels resembled that of cortisol. Accordingly, Spearman correlation analysis revealed that an increase in serum cortisol concentrations is correlated with rising levels of glucose. With respect to immune-endocrine interactions a significant negative correlation between cortisol and anti-A. crassus antibodies was found. Our data show that A. crassus is the most potent stressor for European eels among the treatments tested within this study. This is important in terms of ecotoxicological studies as the main effects are caused by parasites rather than chemicals. Accordingly, effects of parasites on the physiological homeostasis of organisms must be considered in ecotoxicology. From the parasitological point of view our results suggest that probably as part of an unbalanced host-parasite interaction A. crassus evokes a strong cortisol response in A. anguilla, thereby suppressing the immune response which in turn enables the parasite to establish. The parasite-induced stress response in the newly adopted European eel might be one of the factors which contributes to the extremely effective colonizing strategy of A. crassus. Text Anguilla anguilla DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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stress response cortisol glucose Anguillicola crassus Anguilla anguilla parasites as stressors PCB Cd 610 Medizin und Gesundheit 570 Biowissenschaften; Biologie |
spellingShingle |
stress response cortisol glucose Anguillicola crassus Anguilla anguilla parasites as stressors PCB Cd 610 Medizin und Gesundheit 570 Biowissenschaften; Biologie Sures, B. Lutz, I. Kloas, W. Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
topic_facet |
stress response cortisol glucose Anguillicola crassus Anguilla anguilla parasites as stressors PCB Cd 610 Medizin und Gesundheit 570 Biowissenschaften; Biologie |
description |
To investigate whether the stress response of European eels infected with Anguillicola crassus is influenced by environmental pollutants, experimentally infected eels were exposed to Cd and/or to 3,3′, 4,4′, 5-pentachlorobiphenyl (PCB 126). Serum cortisol and glucose concentrations of these eels were monitored over a period of 103 days and were compared with data from infected, unexposed eels as well as with data from uninfected eels. Additionally, the levels of cortisol were correlated with concentrations of Anguillicola-specific antibodies. All eels showed an initial increase of the cortisol levels until day 63. This general elevation of plasma cortisol is most likely due to handling stress, as all eels were repeatedly netted and afterwards inoculated with a feeding tube. At the end of the exposure period eels which were infected and those which were infected and simultaneously exposed to Cd and PCB showed significantly higher levels than the controls. The general course of serum glucose levels in eels resembled that of cortisol. Accordingly, Spearman correlation analysis revealed that an increase in serum cortisol concentrations is correlated with rising levels of glucose. With respect to immune-endocrine interactions a significant negative correlation between cortisol and anti-A. crassus antibodies was found. Our data show that A. crassus is the most potent stressor for European eels among the treatments tested within this study. This is important in terms of ecotoxicological studies as the main effects are caused by parasites rather than chemicals. Accordingly, effects of parasites on the physiological homeostasis of organisms must be considered in ecotoxicology. From the parasitological point of view our results suggest that probably as part of an unbalanced host-parasite interaction A. crassus evokes a strong cortisol response in A. anguilla, thereby suppressing the immune response which in turn enables the parasite to establish. The parasite-induced stress response in the newly adopted European eel might be one of the factors which contributes to the extremely effective colonizing strategy of A. crassus. |
format |
Text |
author |
Sures, B. Lutz, I. Kloas, W. |
author_facet |
Sures, B. Lutz, I. Kloas, W. |
author_sort |
Sures, B. |
title |
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
title_short |
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
title_full |
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
title_fullStr |
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
title_full_unstemmed |
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla) |
title_sort |
effects of infection with anguillicola crassus and simultaneous exposure with cd and 3,3′,4,4′,5-pentachlorobiphenyl (pcb 126) on the levels of cortisol and glucose in european eel (anguilla anguilla) |
publisher |
Humboldt-Universität zu Berlin |
publishDate |
2005 |
url |
https://dx.doi.org/10.18452/21777 https://edoc.hu-berlin.de/handle/18452/22492 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_doi |
https://doi.org/10.18452/21777 |
_version_ |
1766399384165023744 |