Abstract
Exposure to environmental contaminants, like 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), leads to an increased susceptibility to infectious agents. Infection of bovine cells (MDBK) with Bovine Herpesvirus 1 (BHV-1) anticipates virus-induced apoptosis, suggesting an involvement of TCDD in virus infection. Herein we analyzed the effects of TCDD on apoptotic pathway in MDBK cells infected with BHV-1. After 12 h of infection, TCDD induced a significant increase in apoptotic cells. TCDD caused a dose-dependent up-regulation and anticipated activation of caspases 3, 8 and 9, with respect to unexposed groups. TCDD anticipated cleavage of PARP, compared to controls. Furthermore TCDD increased Bax and Bid levels, and decreased Bcl-2 and Bcl-XL levels. Such events took place earlier in exposed than unexposed cells. These results showed that TCDD influences BHV-1 induced apoptosis through members of Bcl-2 family and up-regulating activation of caspases.
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Abbreviations
- TCDD:
-
2,3,7,8-Tetrachlorodibenzo-p-dioxin
- BHV-1:
-
Bovine Herpesvirus 1
- MDBK:
-
Madin-Darby bovine kidney cells
- PARP:
-
Poly-(ADP-ribose) polymerase
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Acknowledgments
This work was supported by grants by Regione Campania for the project entitled: “Contaminanti organici persistenti nell’ambiente: Studio di coorte sullo stato sanitario e sui livelli di accumulo nel latte materno in gruppi di popolazione a differente rischio di esposizione nella Regione Campania”.
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Fiorito, F., Marfè, G., De Blasio, E. et al. 2,3,7,8-Tetrachlorodibenzo-p-dioxin regulates Bovine Herpesvirus type 1 induced apoptosis by modulating Bcl-2 family members. Apoptosis 13, 1243–1252 (2008). https://doi.org/10.1007/s10495-008-0249-y
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DOI: https://doi.org/10.1007/s10495-008-0249-y