Associations between toenail arsenic concentration and dietary factors in a New Hampshire population
<p>Abstract</p> <p>Background</p> <p>Dietary factors such as folate, vitamin B12, protein, and methionine are important for the excretion of arsenic via one-carbon metabolism in undernourished populations exposed to high levels of arsenic via drinking water. However, th...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2012-06-01
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| Series: | Nutrition Journal |
| Subjects: | |
| Online Access: | http://www.nutritionj.com/content/11/1/45 |
| _version_ | 1818117759357157376 |
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| author | Gruber Joann F Karagas Margaret R Gilbert-Diamond Diane Bagley Pamela J Zens M Sayarath Vicki Punshon Tracy Morris J Cottingham Kathryn L |
| author_facet | Gruber Joann F Karagas Margaret R Gilbert-Diamond Diane Bagley Pamela J Zens M Sayarath Vicki Punshon Tracy Morris J Cottingham Kathryn L |
| author_sort | Gruber Joann F |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Dietary factors such as folate, vitamin B12, protein, and methionine are important for the excretion of arsenic via one-carbon metabolism in undernourished populations exposed to high levels of arsenic via drinking water. However, the effects of dietary factors on toenail arsenic concentrations in well-nourished populations exposed to relatively low levels of water arsenic are unknown.</p> <p>Methods</p> <p>As part of a population-based case–control study of skin and bladder cancer from the USA, we evaluated relationships between consumption of dietary factors and arsenic concentrations in toenail clippings. Consumption of each dietary factor was determined from a validated food frequency questionnaire. We used general linear models to examine the associations between toenail arsenic and each dietary factor, taking into account potentially confounding effects.</p> <p>Results</p> <p>As expected, we found an inverse association between ln-transformed toenail arsenic and consumption of vitamin B12 (excluding supplements) and animal protein. Unexpectedly, there were also inverse associations with numerous dietary lipids (e.g., total fat, total animal fat, total vegetable fat, total monounsaturated fat, total polyunsaturated fat, and total saturated fat). Finally, increased toenail arsenic concentrations were associated with increased consumption of long chain n-3 fatty acids.</p> <p>Conclusion</p> <p>In a relatively well-nourished population exposed to relatively low levels of arsenic via water, consumption of certain dietary lipids may decrease toenail arsenic concentration, while long chain n-3 fatty acids may increase toenail arsenic concentration, possibly due to their association with arsenolipids in fish tissue.</p> |
| first_indexed | 2024-12-11T04:43:31Z |
| format | Article |
| id | doaj.art-9eeacb9a39a349b8921dea159144a97e |
| institution | Directory Open Access Journal |
| issn | 1475-2891 |
| language | English |
| last_indexed | 2024-12-11T04:43:31Z |
| publishDate | 2012-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Nutrition Journal |
| spelling | doaj.art-9eeacb9a39a349b8921dea159144a97e2022-12-22T01:20:33ZengBMCNutrition Journal1475-28912012-06-011114510.1186/1475-2891-11-45Associations between toenail arsenic concentration and dietary factors in a New Hampshire populationGruber Joann FKaragas Margaret RGilbert-Diamond DianeBagley Pamela JZens MSayarath VickiPunshon TracyMorris JCottingham Kathryn L<p>Abstract</p> <p>Background</p> <p>Dietary factors such as folate, vitamin B12, protein, and methionine are important for the excretion of arsenic via one-carbon metabolism in undernourished populations exposed to high levels of arsenic via drinking water. However, the effects of dietary factors on toenail arsenic concentrations in well-nourished populations exposed to relatively low levels of water arsenic are unknown.</p> <p>Methods</p> <p>As part of a population-based case–control study of skin and bladder cancer from the USA, we evaluated relationships between consumption of dietary factors and arsenic concentrations in toenail clippings. Consumption of each dietary factor was determined from a validated food frequency questionnaire. We used general linear models to examine the associations between toenail arsenic and each dietary factor, taking into account potentially confounding effects.</p> <p>Results</p> <p>As expected, we found an inverse association between ln-transformed toenail arsenic and consumption of vitamin B12 (excluding supplements) and animal protein. Unexpectedly, there were also inverse associations with numerous dietary lipids (e.g., total fat, total animal fat, total vegetable fat, total monounsaturated fat, total polyunsaturated fat, and total saturated fat). Finally, increased toenail arsenic concentrations were associated with increased consumption of long chain n-3 fatty acids.</p> <p>Conclusion</p> <p>In a relatively well-nourished population exposed to relatively low levels of arsenic via water, consumption of certain dietary lipids may decrease toenail arsenic concentration, while long chain n-3 fatty acids may increase toenail arsenic concentration, possibly due to their association with arsenolipids in fish tissue.</p>http://www.nutritionj.com/content/11/1/45ArsenicEpidemiologyBiomarkersLipidsFatty acidsFishOne-carbon metabolismFolate |
| spellingShingle | Gruber Joann F Karagas Margaret R Gilbert-Diamond Diane Bagley Pamela J Zens M Sayarath Vicki Punshon Tracy Morris J Cottingham Kathryn L Associations between toenail arsenic concentration and dietary factors in a New Hampshire population Nutrition Journal Arsenic Epidemiology Biomarkers Lipids Fatty acids Fish One-carbon metabolism Folate |
| title | Associations between toenail arsenic concentration and dietary factors in a New Hampshire population |
| title_full | Associations between toenail arsenic concentration and dietary factors in a New Hampshire population |
| title_fullStr | Associations between toenail arsenic concentration and dietary factors in a New Hampshire population |
| title_full_unstemmed | Associations between toenail arsenic concentration and dietary factors in a New Hampshire population |
| title_short | Associations between toenail arsenic concentration and dietary factors in a New Hampshire population |
| title_sort | associations between toenail arsenic concentration and dietary factors in a new hampshire population |
| topic | Arsenic Epidemiology Biomarkers Lipids Fatty acids Fish One-carbon metabolism Folate |
| url | http://www.nutritionj.com/content/11/1/45 |
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