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The Toxicologist - Society of Toxicology

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if abnormal PF was associated with employment as a boat manufacturer worker.<br />

Mean FVC and FEV1 values were determined and linear regression was used to<br />

evaluate the impact <strong>of</strong> boat manufacturer worker status on PF after adjusting for<br />

confounders. Workers produced statistically significant higher mean FVC and<br />

FEV1 values <strong>of</strong> 4.94 L (95%CI 4.75 - 5.13) and 3.86 L (95%CI 3.72 - 4.01) respectively<br />

compared to mean NHANES III subject values <strong>of</strong> 4.01 L (95%CI 3.98 -<br />

4.02) and 3.20 L (95%CI 3.18-3.21). Stratification by age, height, and smoking<br />

status yielded similar results. Multivariate regression analysis demonstrated that significant<br />

predictors <strong>of</strong> FEV1 included age, height, gender, and pack-years <strong>of</strong> smoking<br />

(all p-values < 0.0001), but not boat manufacturer employment (p = 0.2023).<br />

Significant predictors <strong>of</strong> FVC included age, height, and gender (all p-values <<br />

0.0001). Employment as a boat manufacturer worker was significantly associated<br />

with an increase in FVC (p < 0.0001). <strong>The</strong> moderate increase in PF observed in<br />

boat manufacturer workers is likely due to a combination <strong>of</strong> effective exposure controls<br />

in the workplace and the healthy worker effect.<br />

1200 CIRCULATING LEVELS OF PERSISTENT ORGANIC<br />

POLLUTANTS ASSOCIATE IN DIVERGENT WAYS TO<br />

FAT MASS IN HUMANS.<br />

M. Rönn1 , L. Lind1 , B. van Bavel2 , S. Salihovic2 , K. Michaelsson3 and M. P.<br />

Lind1 . 1Department <strong>of</strong> Medical Sciences, Uppsala University, Uppsala, Sweden,<br />

2MTM Research Center, Örebro University, Örebro, Sweden and 3Department <strong>of</strong><br />

Surgical Sciences, Uppsala University, Uppsala, Sweden.<br />

Background: Environmental contaminants have recently been implicated in the<br />

pathogenesis <strong>of</strong> obesity. <strong>The</strong> present study aims to explore the relationship between<br />

Persistent Organic Pollutants (POPs) and fat mass in humans. Material and methods:<br />

In the Prospective Study <strong>of</strong> the Vasculature in Uppsala Seniors (PIVUS) study,<br />

fat mass was determined by dual-energy X-ray absorptiometry (DXA) together with<br />

twenty-one POPs (including 16 polychlorinated biphenyl (PCB) congeners, 3<br />

organochlorine (OC) pesticides, 1 brominated diphenyl ether (BDE47) and 1<br />

dioxin) measured in plasma (high resolution chromatography coupled with high<br />

resolution mass spectrometry) collected at baseline in 890 participants aged 70<br />

years. Results: Lipid-standardized plasma concentrations <strong>of</strong> Octa-chlorinated<br />

dioxin (OCDD), the PCBs 74, 99, 105 and 118 and the pesticides hexachlorobenzene<br />

(HCB), transnonachlordane (TNK) and dichlorodiphenyldichloroethylene<br />

(DDE), were all positively related to fat mass (p=0.03-0.0001). On the contrary,<br />

the PCBs 156, 157, 169, 170, 180, 189, 194, 206 and 209 were negatively related<br />

to fat mass (p=0.0001). Following adjustment for smoking, physical activity, education<br />

level, height, lean mass and gender these results remained significant<br />

(p=0.01-0.0001) except for PCB 74 and 99. For some <strong>of</strong> the negatively related<br />

PCBs the effects were more pronounced in women than in men. Conclusion:<br />

Plasma concentrations <strong>of</strong> some pesticides are positively related to fat mass, while divergent<br />

effects are seen for the PCBs. <strong>The</strong>se results implicate a complex role <strong>of</strong><br />

POPs in obesity.<br />

1201 CIRCULATING LEVELS OF PHTHALATES, BISPHENOL<br />

A, AND ABDOMINAL OBESITY.<br />

M. P. Lind1 , M. Rönn1 , K. Michaelsson2 , D. A. Birkholz3 , L. Johansson4 , H.<br />

Ahlström4 and L. Lind5 . 1Department <strong>of</strong> Medical Sciences, Occupational and<br />

Environmental Medicine, Uppsala University, Uppsala, Sweden, 2Department <strong>of</strong><br />

Surgical Sciences, Uppsala University, Uppsala, Sweden, 3Environmental Division,<br />

ALS, Edmonton, AB, Canada, 4Department <strong>of</strong> Radiology, University Hospital,<br />

Uppsala, Sweden and 5Department <strong>of</strong> Medical Sciences, Acute and Internal Medicine,<br />

Uppsala University, Uppsala, Sweden.<br />

BACKGROUND: <strong>The</strong> plastic manufacture substances phthalates and bisphenol A<br />

(BPA) has previously been suggested to be obesogens. Since abdominal obesity is<br />

more closely related to cardiovascular disease than peripheral obesity, we investigated<br />

the relationship between circulating levels <strong>of</strong> some phthalate metabolites,<br />

BPA and obesity measures obtained by Magnetic resonance imaging (MRI) and<br />

Dual energy X-ray absorptiometry (DXA). METHODS: In the population-based<br />

Prospective Investigation <strong>of</strong> the<br />

Vasculature in Uppsala Seniors (PIVUS) study (1016 subjects all aged 70), serum<br />

levels <strong>of</strong> BPA and phthalate metabolites were measured by Isotope Dilution-High<br />

Performance Liquid Chromatography-Tandem Mass Spectrometry. Waist circumference<br />

and trunk fat mass by DXA were measured in 890 subjects, while subcutaneous<br />

and visceral abdominal fat were evaluated by MRI in 287 individuals. RE-<br />

SULTS: BPA and four phthalate metabolites (Monoisobutyl phthalate (MiBP),<br />

Monomethyl phthalate (MMP), Monoethyl phthalate (MEP), Mono-(2-ethylhexyl)<br />

phthalate (MEHP)) were detectable in almost all subjects. MiBP was related<br />

to waist circumference (p=0.013), trunk fat at DXA (p=0.004) and subcutaneous<br />

abdominal fat at MRI (p=0.001) in women, but not in men (p=0.05-0.003) for<br />

gender difference in association). BPA and the other 3 detectable phthalates did not<br />

relate to obesity measures. CONCLUSION: <strong>The</strong> phthalate metabolite MiBP is related<br />

to central obesity in women, but not in men.<br />

1202 ATHEROSCLEROSIS IS RELATED TO CIRCULATING<br />

LEVELS OF PERSISTENT ORGANIC POLLUTANTS<br />

(POPS) IN THE ELDERLY.<br />

L. Lind 1 , B. van Bavel 2 , S. Salihovic 2 and M. P. Lind 3 . 1 Acute and Internal<br />

Medicine, Department <strong>of</strong> Medical Sciences, Uppsala University Hospital, Uppsala,<br />

Sweden, 2 MTM Research Centre, School <strong>of</strong> Science and Technology, Örebro<br />

University, Örebro, Sweden and 3 Occupational and Environmental Medicine,<br />

Department <strong>of</strong> Medical Sciences, Uppsala University, Uppsala, Sweden.<br />

BACKGROUND: Increased circulating levels <strong>of</strong> persistent organic pollutants<br />

(POPs) have previously been associated with myocardial infarction. Since myocardial<br />

infarction is an atherosclerotic disease, we here investigated if levels <strong>of</strong> POPs are<br />

related to atherosclerosis. METHODS AND RESULTS: In the population-based<br />

Prospective Investigation <strong>of</strong> the Vasculature in Uppsala Seniors (PIVUS) study<br />

(1016 subjects all aged 70), the prevalence <strong>of</strong> carotid artery plaques were recorded<br />

by ultrasound. <strong>The</strong> number <strong>of</strong> carotid arteries with plaques (0, 1 or 2) was<br />

recorded. Also the thickness (IMT) and grey scale (IM-GSM) <strong>of</strong> the intima-media<br />

complex were measured. Twenty-one different POPs including 14 PCBs, 5 pesticides,<br />

one dioxin and one brominated compound (BDE47) were analysed by high<br />

resolution chromatography coupled to high resolution mass spectrometry (HRGC/<br />

HRMS). Nine out <strong>of</strong> the PCBs (congeners 99, 153, 138, 156, 180,170, 194, 206<br />

and 209) were related to the number <strong>of</strong> carotid arteries with plaques even after adjustment<br />

for gender, waist circumference, body mass index, fasting blood glucose,<br />

systolic and diastolic blood pressure, HDL and LDL-cholesterol, serum triglycerides,<br />

smoking, antihypertensive treatment and statin use (p=0.004-0.0001). High<br />

levels <strong>of</strong> the highly chlorinated PCBs (194,206 and 206) were associated with an<br />

echolucent IM-GSM (p

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