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Results: 1 to 4 of 4

Publication Record


Association between plasma PFOA and PFOS levels and total cholesterol in a middle-aged Danish population.
Eriksen KT, Raaschou-Nielsen O, McLaughlin JK, Lipworth L, Tjønneland A, Overvad K, Sørensen M
(2013) PLoS One 8: e56969
MeSH Terms: Aged, Alkanesulfonic Acids, Caprylates, Cholesterol, Cross-Sectional Studies, Denmark, Environmental Exposure, Female, Fluorocarbons, Humans, Male, Middle Aged, Population Surveillance
Show Abstract · Added March 1, 2014
Perfluorooctanoate (PFOA) and perfluorooctane sulfonate (PFOS) are used in a variety of consumer products and have been detected worldwide in human blood. Recent studies mainly of highly exposed populations have indicated that PFOA and PFOS may affect serum cholesterol levels, but the magnitude of the effect may be inconsistent across exposure levels. The aim of the present cross-sectional study was to investigate the association between plasma PFOA and PFOS and total cholesterol in a general, middle-aged Danish population. The study population comprised 753 individuals (663 men and 90 women), 50-65 years of age, nested within a Danish cohort of 57,053 participants. Blood samples were taken from all cohort members at enrolment (1993-1997) and stored in a biobank at -150°C. Plasma levels of PFOA and PFOS and serum levels of total cholesterol were measured. The associations between plasma PFOA and PFOS levels and total cholesterol levels were analysed by generalized linear models, both crude and adjusted for potential confounders. We observed statistically significant positive associations between both perfluorinated compounds and total cholesterol, e.g. a 4.4 [95% CI  =  1.1-7.8] higher concentration of total cholesterol (mg/dL) per interquartile range of PFOA plasma level. Sex and prevalent diabetes appeared to modify the association between PFOA and PFOS, respectively, and cholesterol. In conclusion, this study indicated positive associations between plasma PFOA and PFOS levels and total cholesterol in a middle-aged Danish population, although whether the observed pattern of results reflects a causal association is unclear.
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13 MeSH Terms
Amended safety assessment of dodecylbenzenesulfonate, decylbenzenesulfonate, and tridecylbenzenesulfonate salts as used in cosmetics.
Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Andersen FA
(2010) Int J Toxicol 29: 288S-305
MeSH Terms: Alkanesulfonic Acids, Animals, Benzenesulfonates, Chemical Phenomena, Consumer Product Safety, Cosmetics, Detergents, Dose-Response Relationship, Drug, Humans, Irritants, Mutagenicity Tests, Rabbits, Skin, Surface-Active Agents, Toxicity Tests, Acute, Toxicity Tests, Chronic
Show Abstract · Added March 20, 2014
Sodium dodecylbenzenesulfonate is one of a group of salts of alkylbenzene sulfonates used in cosmetics as surfactant-cleansing agents. Sodium dodecylbenzenesulfonate is soluble in water and partially soluble in alcohol, with dermal absorption dependent on pH. Dodecylbenzenesulfonate salts are not toxic in single-dose oral and dermal animal tests, and no systemic toxicities were observed in repeat-dose dermal animal studies. In dermal animal studies, no evidence of reproductive or developmental toxicity was reported. At 15% concentrations, sodium dodecylbenzenesulfonate was severely irritating to rabbit skin. The Cosmetic Ingredient Review Expert Panel concluded that the irritant properties of these ingredients are similar to those of other detergents, with severity dependent on concentration and pH. Products containing these ingredients should be formulated to ensure that the irritancy potential is minimized.
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16 MeSH Terms
Prenatal exposure to PFOA and PFOS and risk of hospitalization for infectious diseases in early childhood.
Fei C, McLaughlin JK, Lipworth L, Olsen J
(2010) Environ Res 110: 773-7
MeSH Terms: Adult, Alkanesulfonic Acids, Caprylates, Child, Child, Preschool, Communicable Diseases, Denmark, Environmental Monitoring, Environmental Pollutants, Epidemiological Monitoring, Female, Fluorocarbons, Hospitalization, Humans, Infant, Male, Maternal Exposure, Pregnancy, Prenatal Exposure Delayed Effects
Show Abstract · Added March 1, 2014
OBJECTIVES - To examine whether prenatal exposure to perfluorooctanesulfonate (PFOS) or perfluorooctanoate (PFOA) is associated with the occurrence of hospitalization for infectious diseases during early childhood.
METHODS - We randomly selected 1400 pregnant women and their offspring from the Danish National Birth Cohort (1996-2002) and measured PFOS and PFOA levels in maternal blood during early pregnancy. Hospitalizations for infection of the offspring were identified by the linkage to the National Hospital Discharge Register through 2008.
RESULTS - Hospitalizations due to infections were not associated with prenatal exposure to PFOA and PFOS. On the contrary, the relative risks of hospitalizations ranged from 0.71 to 0.84 for the three higher quartiles of maternal PFOA levels compared with the lowest, but no dose-response pattern was found. No clear pattern was observed when results were stratified by child's age at infection, with the exception of an inverse association between maternal PFC levels and risk of hospitalization during the child's first year of life.
CONCLUSIONS - These findings suggest that prenatal exposure to PFOA or PFOS is not associated with increased risk of infectious diseases leading to hospitalization in early childhood.
Copyright © 2010 Elsevier Inc. All rights reserved.
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19 MeSH Terms
Annexins V and XII insert into bilayers at mildly acidic pH and form ion channels.
Isas JM, Cartailler JP, Sokolov Y, Patel DR, Langen R, Luecke H, Hall JE, Haigler HT
(2000) Biochemistry 39: 3015-22
MeSH Terms: Alkanesulfonic Acids, Animals, Annexin A5, Annexins, Azirines, Buffers, Humans, Hydra, Hydrogen-Ion Concentration, Iodine Radioisotopes, Ion Channels, Lipid Bilayers, Morpholines, Octoxynol, Phospholipids, Photoaffinity Labels, Polyethylene Glycols, Sodium Acetate, Spin Labels, Tromethamine
Show Abstract · Added March 26, 2013
The functional hallmark of annexins is the ability to bind to the surface of phospholipid membranes in a reversible, Ca(2+)-dependent manner. We now report that human annexin V and hydra annexin XII reversibly bound to phospholipid vesicles in the absence of Ca(2+) at low pH; half-maximal vesicle association occurred at pH 5.3 and 5. 8, respectively. The following biochemical data support the hypothesis that these annexins insert into bilayers at mildly acidic pH. First, a photoactivatable reagent (3-trifluoromethyl)-3-(m-[(125)I]iodophenyl)diazirine) which selectively labels proteins exposed to the hydrophobic domain of bilayers reacted with these annexins at pH 5.0 and below but not at neutral pH. Second, in a Triton X-114 partitioning assay, annexins V and XII act as integral membrane proteins at low pH and as hydrophilic proteins at neutral pH; in the presence of phospholipids half-maximal partitioning into detergent occurred at pH approximately 5.0. Finally, annexin V or XII formed single channels in phospholipid bilayers at low pH but not at neutral pH. A model is discussed in which the concentrations of H(+) and Ca(2+) regulate the reversible conversion of three forms of annexins-soluble, peripheral membrane, and transmembrane.
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20 MeSH Terms