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Diet Induced Weight Loss to Reduce Inflammation in Obese Women

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01699906
Recruitment Status : Completed
First Posted : October 4, 2012
Last Update Posted : November 5, 2014
Information provided by (Responsible Party):
Rockefeller University

Brief Summary:
Breast cancer is one of the most frequently seen cancers in the United States. It occurs at all ages but is particularly common in post menopausal women. Obesity increases the risk of breast cancer and colon cancer among others, and when cancer develops increases the risk of spread and death. 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 reduce the risk of breast cancer in obese women as well as the spread of other cancers in the body. Weight reduction in obesity has been shown in epidemiology studies to lower the risk of colon cancer and in obese women to lower the risk of breast cancer. However, how that occurs and how much weight loss is necessary is not known. In mice, calorie restriction in obese animals has been shown to reduce inflammation in fat tissue and the breast. In other studies, calorie reduction has been shown to lower the development of cancer. In addition, we really do not know what starts the whole inflammation process. One good possibility is that immune factors that tend to reduce inflammation are less in obesity. We have shown this in the colon and this also has been suggested as occurring in fat stores.

Condition or disease Intervention/treatment Phase
Obesity Other: Diet regimen to induce weight loss Not Applicable

Detailed Description:

This study aims to determine if weight loss of about 10% of initial weight lowers evidence of inflammation in fat stores. It is likely that, if fat store inflammation is reduced, then inflammation in breast fat also will be lower. Also, it is possible that blood immune cells may be changed with weight loss and even that immune cells in skin will be affected. Since vitamin D has important immune effects and vitamin D is low in obesity, we also want to study what happens to this vitamin during weight loss.

This pilot study of weight loss will be done in 10 very obese post menopausal women. This study will include nutritional and medical evaluation, a 3 day inpatient hospital stay eating a diet providing 50% of what they were taking before starting the study and then a nutritionally adequate diet that will allow them to lose about 10% of their initial weight within 7 to 10 week period. They will have about 4-5 grams of fat removed by suction through a syringe and a biopsy of the skin in addition to studies of blood and stool samples.

When they have completed the study with a 10% body weight loss they will be referred to a nutrition clinic which can counsel them to continue a slower weight loss to an optimal level.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 22 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Diet Induced Weight Loss Reduces Inflammation and Crown-like Structures and Corrects Immune Dysfunction in Subcutaneous Adipose Tissue In Class 2-3 Obese Women: A Pilot Study
Study Start Date : September 2012
Actual Primary Completion Date : September 2014
Actual Study Completion Date : September 2014

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Dietary intervention
Diet regimen to induce weight loss
Other: Diet regimen to induce weight loss
Diet regimen to induce weight loss
Other Name: Very low calorie diet

Primary Outcome Measures :
  1. Adipose tissue inflammation via crown-like structures [ Time Frame: 9 weeks ]

    Diet-induced weight loss of 10% body weight will result in reduction in abdominal subcutaneous fat inflammation as measured by:

    reduction in adipocyte size determined by microscopy and of CLS number in adipose tissue.

    reduction in inflammatory gene expression determined by PCR and selected cytokine protein levels.

    increased anti-inflammatory lymphocytes determined by immunohistochemistry or by flowcytometry.

Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • 40-70 years of age
  • Post-menopausal women defined as: 24 consecutive months without a menstrual period, currently not taking any medication known to induce amenorhea
  • Body Mass Index 35-50

Exclusion Criteria:

  • History of any bleeding disorder
  • HIV positive
  • History of previous weight loss surgery.
  • History of Inflammatory Bowel Disease
  • History of any other malignancy other than non-melanoma skin cancer in the past 5 years
  • Currently taking fish oil, omega-3 supplements or other herbal supplements that exceed GRAS (Generally Recognized as Safe) levels
  • Currently taking any estrogen/progesterone hormones except vaginal cream
  • Smokers (or stopped < 3 months ago)
  • Currently taking any medication that can alter fat stores as determined by the principal investigator
  • Currently taking any weight control medication
  • Currently taking hypoglycemic medications.
  • Currently taking NSAIDS, aspirin, (if > once a week, stopped <30 days ago). Aspirin 81mg may be permitted if the Framingham Risk Score is < 10
  • Currently taking anticoagulant medication or stopped <30 days ago.
  • Screening fasting blood glucose >165mg/dL
  • Screening thyroid function test abnormal
  • Screening LFT results > 2X upper limit of normal
  • Screening creatinine > 2X upper limit of normal
  • Any condition or situation which, in the opinion of the investigator, puts the patient at significant risk, could complicate the study results, or may interfere significantly with participation in the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01699906

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United States, New York
The Rockefeller University
New York, New York, United States, 10065
Sponsors and Collaborators
Rockefeller University
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Principal Investigator: Peter R. Holt, MD The Rockefeller University
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Rockefeller University Identifier: NCT01699906    
Other Study ID Numbers: PHO-0785
First Posted: October 4, 2012    Key Record Dates
Last Update Posted: November 5, 2014
Last Verified: June 2013
Keywords provided by Rockefeller University:
Additional relevant MeSH terms:
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Weight Loss
Body Weight
Pathologic Processes
Body Weight Changes