Bitumen products induce skin cell apoptosis in chronically exposed road pavers
| Autor: | C Caltabiano, Venerando Rapisarda, Giuseppa Martinez, Matteo Valentino, Maria Luisa Carnazza, Carla Loreto, Giuseppe Musumeci |
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| Rok vydání: | 2009 |
| Předmět: |
Male
medicine.medical_specialty Pathology Programmed cell death Histology Biopsy Apoptosis Dermatology Pathology and Forensic Medicine TNF-Related Apoptosis-Inducing Ligand Risk Factors Neoplasms Occupational Exposure Medicine Humans DNA Breaks Double-Stranded Receptor Skin bcl-2-Associated X Protein Lung TUNEL assay business.industry Caspase 3 Anatomical pathology Hydrocarbons Receptors TNF-Related Apoptosis-Inducing Ligand medicine.anatomical_structure Terminal deoxynucleotidyl transferase Bitumen Tumor necrosis factor alpha Female business |
| Zdroj: | Journal of cutaneous pathology. 36(7) |
| ISSN: | 1600-0560 |
| Popis: | Background: Worker’s exposure to bitumen fumes, via inhalation and skin contamination, is related to adverse effects including an increased risk of lung, stomach and non-melanoma skin cancers and leukaemia. The two major mechanisms regulating apoptosis include the mitochondria-mediated intrinsic pathway and the extrinsic pathway induced by death signalling ligands. In a previous study, we showed activation of apoptosis-regulating proteins BAX and BCL-2 in road pavers chronically exposed to bitumen fumes. These molecules play a central role in activation of programmed cell death by the intrinsic pathway. In this study, we hypothesized that the apoptosis mechanism could be activated in the skin of road pavers chronically exposed to bitumen fumes also through the extrinsic pathway, via mediation by tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) and its death receptor, DR5. Methods: Skin punch biopsies from 16 occupationally exposed workers and a control group were processed immunohistochemically for TRAIL and DR5. Activation of programmed cell death was also investigated by expression of caspase-3 and visualization of DNA strand breaks. Results and Conclusion: TRAIL, DR5 and caspase-3 overexpression and enhanced Terminal Deoxynucleotidyl Transferase Mediated dUTP Nick End Labeling (TUNEL) positivity were found in chronically bitumen-exposed skin, suggesting activation of apoptosis as a defence mechanism. |
| Databáze: | OpenAIRE |
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