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Polyphenols belong to the largest group of secondary metabolites produced by plants, mainly, in response to biotic or abiotic stresses such as infections, wounding, UV irradiation, exposure to ozone, pollutants, and other hostile environmental conditions. It is thought that the molecular basis for the protective action of polyphenols in plants is their antioxidant and free radical scavenging properties. These numerous phenolic compounds are major biologically active components of spices, aromas, essential oils, and traditional medicines. In order to investigate the impact of spice polyphenols on postprandial cytotoxic lipid peroxidation products (MDA) levels in humans, the investigators propose to achieve the following specific aims using a randomized crossover study design:
This study will determine whether spice polyphenols exert a beneficial effect by inhibition of the absorption of MDA. These findings may help to explain the potentially harmful effects of oxidizable fats found in foods and the important benefit of dietary polyphenols in ameliorating this potentially harmful effect.
10 male subjects with type 2 diabetes mellitus who will be recruited based on inclusion and exclusion criteria. The study will be carried out in accordance with the guidelines of the Human Subjects Protection Committee of the University of California, Los Angeles. All subjects will give written informed consent before the study begins. After the screening visit, each subject will come to the Center for Human Nutrition on two 1-day test phases separated by at least one week. At each of phases, subjects will consume, in a random order, two different test meals consisting of either: a) a ground dark meat beef patty seasoned with salt only, or b) a ground dark meat beef patty seasoned with a spice mixture and salt. The subjects will be asked to avoid eating meat, poultry, or fish products for 3 days before the day of each of the two experimental phases
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Hamburger meat patty with Spice Blend | Active Comparator | Hamburger meat patty containing spice blend will be consumed on 3 separate occasions |
|
| Hamburger meat patty with salt | Placebo Comparator | Hamburger meat patty containing salt will be consumed on 3 separate occasions |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Hamburger meat patty with salt | Other | hamburger meat cooked with salt |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Change in plasma and urinary MDA after consumption of hamburg with or without spice mixture added | Change in plasma and urinary MDA after consumption of 250 g hamburg meat with 11.3 g spice mixture added or without spice | 2 days |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Zhaoping Li, MD, PhD | David Geffen School of Medicine, UCLA Center for Human Nutrtiion | Principal Investigator |
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| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 20335545 | Derived | Li Z, Henning SM, Zhang Y, Zerlin A, Li L, Gao K, Lee RP, Karp H, Thames G, Bowerman S, Heber D. Antioxidant-rich spice added to hamburger meat during cooking results in reduced meat, plasma, and urine malondialdehyde concentrations. Am J Clin Nutr. 2010 May;91(5):1180-4. doi: 10.3945/ajcn.2009.28526. Epub 2010 Mar 24. |
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| ID | Term |
|---|---|
| D003924 | Diabetes Mellitus, Type 2 |
| ID | Term |
|---|---|
| D003920 | Diabetes Mellitus |
| D044882 | Glucose Metabolism Disorders |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D012492 | Salts |
| ID | Term |
|---|---|
| D007287 | Inorganic Chemicals |
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| Hamburger meat patty with spice blend |
| Other |
hamburger meat cooked with spice mixture |
|
| D004700 | Endocrine System Diseases |