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| ID | Type | Description | Link |
|---|---|---|---|
| 5R01ES023349-03 | U.S. NIH Grant/Contract | View source |
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| Name | Class |
|---|---|
| National Institute of Environmental Health Sciences (NIEHS) | NIH |
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To evaluate serum levels of gamma tocopherol and it's metabolites after 3 doses, each separated by 12 hours.
In previous studies the investigators have demonstrated that gamma-tocopherol-enriched (yT) supplementation decreased systemic oxidative stress, increased serum levels of yT, and inhibited monocyte responses to LPS without any adverse health effects. Free Radic Biol Med. 2008 Jul 1;45(1):40-9. doi: 10.1016/j.freeradbiomed.2008.03.002. Epub 2008 Mar 12.
Oxidant stress plays an important role in mucosal inflammation. Oxidant stress occurs individuals after exposure to air pollution, including high levels of ozone, LPS exposure and woodsmoke particle exposure. Potential exposure to all of these are naturally occurring events. Previous studies have also shown that asthmatic individuals tend to have lower endogenous levels of antioxidants such a s vitamins E and C, and that supplementing antioxidants can decrease exacerbation's associated with ozone exposure in children. The investigators are interested in future studies to examine the benefits of a rapid gamma tocopherol supplement in individuals who will be exposed to air pollution, either in a controlled chamber study or in a real life event, such as during high O3 days or when a woodsmoke fire is in their neighborhood.
This study is to address the question: can the investigators see an increase in serum levels of gT with a shorter course of gT supplementation? Additionally, before embarking on other investigations of gT as a potential prophylactic supplement, it is prudent to determine is discernible levels can be achieved with a shorter dose of gT.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Gamma Tocopherol | Experimental | Subjects will ingest 1400 mg gamma tocopherol, orally administered in 3 doses separated by 12 hours. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Gamma tocopherol | Dietary Supplement | 3 doses of 1400 mg gamma tocopherol (2 capsules, each is 700mg), at 12 hour intervals |
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| Measure | Description | Time Frame |
|---|---|---|
| Change in gamma tocopherol serum levels | Baseline, 30 hours after initial dosing |
| Measure | Description | Time Frame |
|---|---|---|
| Change in gamma-CEHC | Baseline, 30 hours after dosing initial dosing | |
| Change in 5-NO-gamma tocopherol | Baseline, 30 hours after dosing initial dosing | |
| Number of Participants With Abnormal Laboratory Values and/or Adverse Events That Are Related to Treatment |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| David B. Peden, MD, MS | University of North Carolina, Chapel Hill | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Center for Environmental Medicine, Asthma and Lung Biology | Chapel Hill | North Carolina | 27599 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 18405673 | Result | Wiser J, Alexis NE, Jiang Q, Wu W, Robinette C, Roubey R, Peden DB. In vivo gamma-tocopherol supplementation decreases systemic oxidative stress and cytokine responses of human monocytes in normal and asthmatic subjects. Free Radic Biol Med. 2008 Jul 1;45(1):40-9. doi: 10.1016/j.freeradbiomed.2008.03.002. Epub 2008 Mar 12. |
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| ID | Term |
|---|---|
| D024504 | gamma-Tocopherol |
| D014810 | Vitamin E |
| ID | Term |
|---|---|
| D024505 | Tocopherols |
| D001578 | Benzopyrans |
| D011714 | Pyrans |
| D006573 | Heterocyclic Compounds, 1-Ring |
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| Baseline, 30 hours after initial dosing |
| D006571 |
| Heterocyclic Compounds |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |