Federica Ghelli1, Valeria Bellisario1, Giulia Squillacioti1, Elena Grignani2, Giacomo Garzaro3, Martina Buglisi1, Enrico Bergamaschi3, Roberto Bono4. 1. Department of Public Health and Pediatrics, University of Turin, via Santena 5 bis, 10126, Turin, Italy. 2. Maugeri Scientific Clinical Institutes, Via Salvatore Maugeri, 10, 27100, Pavia, Italy. 3. Department of Public Health and Pediatrics, University of Turin, via Zuretti 29, 10126, Turin, Italy. 4. Department of Public Health and Pediatrics, University of Turin, via Santena 5 bis, 10126, Turin, Italy. roberto.bono@unito.it.
Abstract
BACKGROUND: Many workers are exposed to wood dust (WD) and formaldehyde (FA), whose carcinogenic activity is supposed to be oxidative stress-mediated. This study aims to assess to what extent the occupational exposure to WD and FA, albeit within regulatory limits, could result in OS induction in a woodworkers' population. METHODS: The sample population consisted of 127 woodworkers from 4 factories and 111 unexposed controls. Individual exposure was assessed by personal air-samplers. Each participant enrolled in the study filled out a questionnaire and provided a urinary sample to quantify OS biomarkers, namely 15-F2t-IsoProstane (15-F2t-IsoP) and 7,8-dihydro-8-oxo-2'-deoxyguanosine (8-oxo-dGuo). The main confounding factor for OS, i.e. tobacco smoking exposure, was assessed by measuring cotinine in urine samples. RESULTS: Woodworkers were exposed to significantly higher amounts of WD and FA as compared to controls (p < 0.001). Among OS biomarkers, 15-F2t-IsoP showed statistically significant higher values in woodworkers compared to controls (p = 0.004). A significant, positive correlation was observed between 15-F2t-IsoP and 8-oxo-dGuo (p = 0.005), cotinine (p = 0.05), FA (p < 0.001) and WD (p = 0.01); 8-oxo-dGuo was significantly correlated with cotinine (p = 0.001) and WD (p = 0.004). In addition, WD and FA were significantly correlated each other (p < 0.001). CONCLUSIONS: The study confirms that WD and FA may induce OS in woodworkers, and highlights that even the compliance with occupational exposure limits can result in measurable biological outcomes.
BACKGROUND: Many workers are exposed to wood dust (WD) and formaldehyde (FA), whose carcinogenic activity is supposed to be oxidative stress-mediated. This study aims to assess to what extent the occupational exposure to WD and FA, albeit within regulatory limits, could result in OS induction in a woodworkers' population. METHODS: The sample population consisted of 127 woodworkers from 4 factories and 111 unexposed controls. Individual exposure was assessed by personal air-samplers. Each participant enrolled in the study filled out a questionnaire and provided a urinary sample to quantify OS biomarkers, namely 15-F2t-IsoProstane (15-F2t-IsoP) and 7,8-dihydro-8-oxo-2'-deoxyguanosine (8-oxo-dGuo). The main confounding factor for OS, i.e. tobacco smoking exposure, was assessed by measuring cotinine in urine samples. RESULTS: Woodworkers were exposed to significantly higher amounts of WD and FA as compared to controls (p < 0.001). Among OS biomarkers, 15-F2t-IsoP showed statistically significant higher values in woodworkers compared to controls (p = 0.004). A significant, positive correlation was observed between 15-F2t-IsoP and 8-oxo-dGuo (p = 0.005), cotinine (p = 0.05), FA (p < 0.001) and WD (p = 0.01); 8-oxo-dGuo was significantly correlated with cotinine (p = 0.001) and WD (p = 0.004). In addition, WD and FA were significantly correlated each other (p < 0.001). CONCLUSIONS: The study confirms that WD and FA may induce OS in woodworkers, and highlights that even the compliance with occupational exposure limits can result in measurable biological outcomes.
Authors: Sara Corbin; Kayo Togawa; Joachim Schüz; Charlotte Le Cornet; Beatrice Fervers; Maria Feychting; Pernilla Wiebert; Johnni Hansen; Susanne Oksbjerg Dalton; Kristina Kjærheim; Karl-Christian Nordby; Ragnhild Strand Østrem; Niels E Skakkebæk; Sanni Uuksulainen; Eero Pukkala; Ann Olsson Journal: Int Arch Occup Environ Health Date: 2021-12-01 Impact factor: 2.851