A Pilot Study of Docosahexaenoic Acid (DHA) in Obese Menopausal Women
|Study Design:||Intervention Model: Single Group Assignment
Masking: No masking
Primary Purpose: Basic Science
|Official Title:||Docosahexaenoic Acid (DHA) Reduces Inflammation and Aromatase Expression in Subcutaneous Fat in Obese Postmenopausal Women: A Pilot Study|
- Reduced subcutaneous fat (obese) [ Time Frame: 6 weeks ]Reduced subcutaneous fat inflammation changes between pre and post treatment for 5 pilot subject as seen by histologic quantification of monocyte aggregations (crowns), CD68 and CD163 stained macrophages in fat biopsies.
- Reduced subcutaneous fat (morbidly obese) [ Time Frame: 6 weeks ]Reduced subcutaneous fat between pre and post treatment for an additional 12 morbidly obese subjects as seen by histologic quantification of monocyte aggregations (crowns), CD68 and CD163 stained macrophages in fat biopsies.
- multiplex bead assay/immunoassay [ Time Frame: 6 weeks ]
Lowered aromatase expression in fat biopsies accompanied by decreases in the synthetic enzyme COX1-MPGES-1 and/or increase in the catabolic enzyme 15-PGDH and associated changes in BRAC-1 and SIRT-1 expression by immunohistochemical evaluation of CD68, CD168 and CD3 stained monocytes and through examination of the mRNA of imune inflammatory markers in fat biopsies.
Alteration in serum estradiol and testosterone levels and/or changes in circulating cytokines/chemokines measured by multiplex bead assay and immunoassay.
|Study Start Date:||May 2010|
|Study Completion Date:||April 2013|
|Primary Completion Date:||April 2013 (Final data collection date for primary outcome measure)|
Dietary Supplement: dietary intervention
Breast cancer is one of the most frequently seen cancers in the United States. Breast cancer occurs at all ages but is particularly common in post menopausal women. Obesity increases the risk of breast cancer primarily of the type that is stimulated by the female sex hormone estrogen. In obesity, fat cells produce estrogen which can alter breast tissue, while lowering blood estrogen reduces the incidence of breast cancer. Inflammation of fat tissue, the coronary blood vessels and the liver are also seen with obesity. Animal experiments have shown the inflammation in fat tissue increases the production of estrogen, thus reducing inflammation in fat tissue might lower estrogen levels and the risk of breast cancer in obese women. A diet high in omega-3-fatty acids, such as those found in fish oil, has been shown in mice to reduce inflammation and aromatase expression (rate limiting enzyme for estrogen synthesis) in fat tissue.
This pilot study of five obese, post-menopausal women and an additional 12 morbidly obese post-menopausal women will include nutritional and medical evaluations, a four day inpatient hospital stay on a regular diet, to measure the inflammation and the estrogen producing machinery of each volunteer subject. Following these baseline measurements, subjects will be provided DHA supplements to take daily for three months and requested to weigh themselves twice weekly at home with the goal of maintaining their weight. Telephone interviews will be performed at scheduled points to check-in with the subjects and after six weeks a return visit to the OPRC will be conducted to assess progress and provide additional supplements. At three months each subject will be readmitted to the hospital and repeat the tests performed before starting on the DHA supplement. If the study shows feasibility and positive results it will be extended to more subjects and other interventions in the future.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01127867
|United States, New York|
|The Rockefeller University|
|New York, New York, United States, 10065|
|Principal Investigator:||Peter Holt, MD||The Rockefeller University|