ArticleInternational archives of occupational and environmental health2016
No evidence of cardiovascular toxicity in workers exposed below 5 ppm carbon disulfide.
Article in International archives of occupational and environmental health, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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3 authors at 1 institution in 1 country.
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Abstract
purposeCarbon disulfide (CS2), used in the viscose process, is well known for having multiple health effects, including on the cardiovascular system, in workers with long-term exposure higher than 10 ppm. The mechanisms of those effects are, however, not precisely defined, and it remains uncertain whether cardiovascular toxicity may occur at exposure levels lower than 10 ppm. Therefore, the purpose of this study is to explore the health impact of low CS2 exposure levels using an array of preclinical biomarkers of cardiovascular risk.
methodsExposure intensity was determined by measuring urinary 2-thiothiazolidine-4-carboxylic acid (TTCA) in 117 workers from two plants using the viscose process, sampled in multiples phases (2003, 2006 and 2013). A cumulative exposure index (CEI) and a recent exposure index (REI) were calculated for each worker, and shiftwork was documented to account for potential confounding. Cardiovascular parameters included blood pressure, total, LDL and HDL cholesterol, triglycerides, C-reactive protein dosed in serum with high sensitivity (HsCRP), N-terminal pro-brain natriuretic peptide, and albuminuria/creatininuria ratio (UACR). Potential biological confounders were fasting blood glucose and serum creatinine. Bivariate and multivariate regression analyses were used to trace relationships between cardiovascular risk biomarkers and other variables, including CEI, REI and shiftwork duration.
resultsMedian REI and CEI were 0.05 mg TTCA/g creat and 21.5 mg TTCA/g creat*months, respectively. While expected associations, such as between HsCRP and LDL Cholesterol, were found, significant associations between cardiovascular risk markers and CS2 exposure indexes (CEI or REI) were not detected. Shiftwork duration was positively associated with UACR in workers with elevated fasting blood glucose.
conclusionIn practice, when CS2 exposure levels are kept below 5 ppm (TTCA < 2.2 mg/g creat), it does not appear useful to perform a systematic monitoring of total serum cholesterol or its subfractions, or of the new biomarkers of cardiovascular risk (NTproBNP, HsCRP, UACR) investigated in the present study. It appears important to carefully monitor the existence of diabetes that may justify avoiding shiftwork.
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