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| ID | Type | Description | Link |
|---|---|---|---|
| UKCRN 6873 | Registry Identifier | UK Clinical Research Network |
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Skin cancer incidence continues to rise and ultraviolet radiation (UVR) in sunlight is the principal cause. Solar UVR can promote cancer development through its ability to suppress the immune system. The purpose of this study is to determine whether dietary supplementation with omega-3 polyunsaturated fatty acids can protect human skin from UVR-induced immunosuppression.
Skin cancer is one of the most common human cancers with a rising incidence and considerable negative impact on human health. Exposure to ultraviolet radiation (UVR) in sunlight is the major aetiological factor in skin cancer initiation and progression. Human case-control studies have reported an inverse relationship between dietary fish or omega-3 polyunsaturated fatty acid (PUFA) intake and occurrence of non-melanoma skin cancer. Omega-3 PUFA have the potential to reduce the risk of photocarcinogenesis primarily by their ability to reduce production of prostaglandin E2 and consequently photoimmunosuppression. To date, no studies have assessed the impact of omega-3 PUFA on skin photoimmunosuppression in humans.
OBJECTIVE: To examine the potential of dietary omega-3 PUFA to protect against UVR-induced cutaneous immunosuppression in humans.
STUDY DESIGN: A double-blind randomised controlled nutritional study in 64 healthy human volunteers with nickel sensitivity. Volunteers will receive 3 months dietary supplementation with either omega-3 PUFA (n=32) or gelatine (n=32) both provided in identical gelatine capsules.
The aim is to quantify the influence of omega-3 PUFA on:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Omega-3 PUFA capsule | Active Comparator |
| |
| Gelatine capsule | Placebo Comparator |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Omega-3 PUFA | Dietary Supplement | One capsule (4g omega-3 PUFA) daily for 3 months |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Degree of suppression of nickel-induced contact hypersensitivity | Measurement of the erythema of nickel-induced eczema using a reflectance instrument | 3 months |
| Measure | Description | Time Frame |
|---|---|---|
| Intergroup comparison of cytokine and eicosanoid levels and Langerhans cell numbers | 3 months | |
| Correlation of susceptibility to photoimmunosuppression in all subjects with their erythrocyte omega-3:omega-6 PUFA ratio | 3 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Lesley E Rhodes, MBBS, MD | University of Manchester | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Salford Royal NHS Foundation Trust | Manchester | M6 8HD | United Kingdom |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 23364005 | Result | Pilkington SM, Massey KA, Bennett SP, Al-Aasswad NM, Roshdy K, Gibbs NK, Friedmann PS, Nicolaou A, Rhodes LE. Randomized controlled trial of oral omega-3 PUFA in solar-simulated radiation-induced suppression of human cutaneous immune responses. Am J Clin Nutr. 2013 Mar;97(3):646-52. doi: 10.3945/ajcn.112.049494. Epub 2013 Jan 30. | |
| 24311515 |
| Label | URL |
|---|---|
| Study recruitment information | View source |
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| ID | Term |
|---|---|
| D012878 | Skin Neoplasms |
| D003877 | Dermatitis, Contact |
| ID | Term |
|---|---|
| D009371 | Neoplasms by Site |
| D009369 | Neoplasms |
| D012871 | Skin Diseases |
| D017437 | Skin and Connective Tissue Diseases |
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| ID | Term |
|---|---|
| D004281 | Docosahexaenoic Acids |
| D005780 | Gelatin |
| ID | Term |
|---|---|
| D015525 | Fatty Acids, Omega-3 |
| D004042 | Dietary Fats, Unsaturated |
| D004041 | Dietary Fats |
| D005223 | Fats |
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| Gelatine |
| Dietary Supplement |
One capsule daily for 3 months |
|
| Correlation of susceptibility to photoimmunosuppression with cytokine and eicosanoid levels and Langerhans cell numbers | 3 months |
| Pilkington SM, Rhodes LE, Al-Aasswad NM, Massey KA, Nicolaou A. Impact of EPA ingestion on COX- and LOX-mediated eicosanoid synthesis in skin with and without a pro-inflammatory UVR challenge--report of a randomised controlled study in humans. Mol Nutr Food Res. 2014 Mar;58(3):580-90. doi: 10.1002/mnfr.201300405. Epub 2013 Dec 5. |
| D003872 |
| Dermatitis |
| D017443 | Skin Diseases, Eczematous |
| D008055 |
| Lipids |
| D005231 | Fatty Acids, Unsaturated |
| D005227 | Fatty Acids |
| D005395 | Fish Oils |
| D009821 | Oils |
| D012596 | Scleroproteins |
| D011506 | Proteins |
| D000602 | Amino Acids, Peptides, and Proteins |