Children and teens with higher blood levels of chemicals used in the production of non-stick cookware and waterproof fabrics appear more likely to have elevated total and LDL cholesterol levels.
The new study is reported in the September issue of Archives of Pediatrics & Adolescent Medicine, one of the JAMA/Archives journals.
Humans are exposed to the man-made compounds known as perfluoroalkyl acids-including perfluorooctanoic acid (PFOA) and perfluorooctanesulfonate (PFOS)-through drinking water, dust, food packaging, breast milk, cord blood, microwave popcorn, air and occupational exposure.
Recent national survey results reported detection of PFOA and PFOS in almost all samples of human serum.
Animal studies have identified the liver as the primary organ affected by perfluoroalkyl acid exposure, with potential effects in human including alterations in cholesterol levels.
After enrolling in 2005 or 2006, the children and teens submitted blood samples; their average PFOA concentration was 69.2 nanograms per milliliter and average PFOS concentration was 22.7 nanograms per milliliter. Among 12- to 19-year old participants, PFOA concentrations were higher than those detected in a nationally representative survey (29.3 nanograms per milliliter vs. 3.9 nanograms per milliliter), but PFOS concentrations were similar (19.1 nanograms per milliliter vs. 19.3 nanograms per milliliter).
After adjusting for related variables, higher PFOA levels were associated with increased total cholesterol and LDL or “bad” cholesterol, and PFOS was associated with increased total cholesterol, LDL cholesterol and HDL or “good” cholesterol. There was no association between either compound and triglyceride levels.
On average, the one-fifth of children and teens with the highest PFOA levels had total cholesterol levels 4.6 milligrams per deciliter higher and LDL cholesterol levels 3.8 milligrams per deciliter higher than the one-fifth with the lowest PFOA levels. In addition, there was an average difference of 8.5 milligrams per deciliter in total cholesterol levels and 5.8 milligrams per deciliter in LDL cholesterol levels between the one-fifth of participants with the highest and lowest PFOS levels.
Although the design of the study limits cause-and-effect interpretations, the results suggest the association between PFOA and PFOS and elevated cholesterol levels warrant further study, the authors note. “Should the association prove to be etiologic, the cumulative effects of such an elevation in cholesterol on long-term cardiovascular health are unclear given the early age at which these associations were observed.”
Source: Archives of Pediatrics & Adolescent Medicine, USA