The Role of the Omentum in the Treatment of Morbid Obesity

Obesity Clinical Trial

Official title:

The Role of the Omentum in the Treatment of Morbid Obesity

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00212160
• Other study ID #: IRB #040572
• Secondary ID: R01DK0708603R01D
• Status: Completed
• Phase: N/A
• First received: September 13, 2005
• Last updated: January 30, 2017
• Start date: January 2005
• Est. completion date: October 2011

Study information

• Verified date: January 2017
• Source: Vanderbilt University Medical Center
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this research is to determine some of the reasons that blood sugar and insulin levels improve after bariatric surgery but before weight loss begins, as well as why people respond differently to weight loss surgery. It will also examine whether removing the fat around the stomach and large intestine (the omentum) will improve weight loss. Finally, it will see why there are differences between Whites and African Americans who have weight loss surgery.

Description:

The purpose of this research is to tease out the mechanisms related to changes in insulin sensitivity, metabolism, hormones, and body composition following bariatric surgery. Because preliminary data indicate differing responses to this surgery, both Caucasian and African American adults, scheduled for RYGB, are being recruited to participate. It is believed that the omentum contributes to hepatic insulin resistance, both because of the increased delivery of NEFAs via the portal vein, and the increased production of cytokines. Because of this, it is postulated that removing the omentum as part of bariatric surgery will speed up the reversal of insulin resistance and diminish racial differences in response to the surgery.

Data are derived from tissue and blood samples obtained operatively (from individuals having bariatric surgery and other abdominal operations), as well as during hyperinsulinemic-euglycemic clamps, from indirect calorimetry, DEXA, Health-related Quality of Life surveys, and 24-hour urine samples. There were 66 participants randomized to omentectomy/no omentectomy. A post hoc data power analysis determined that this number of subjects is sufficient for data analysis.

Other known NCT identifiers

• NCT00247598

Recruitment information / eligibility

• Status: Completed
• Enrollment: 66
• Est. completion date: October 2011
• Est. primary completion date: October 2011
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 65 Years

Eligibility

Inclusion Criteria:

• BMI > 40

• BMI > 35 with co-morbidities

• normal creatinine/liver labs

• insurance approval for RYGB or resources to self-pay

• proximity to Nashville, TN

Exclusion Criteria:

• use of anticoagulants, steroids, therapeutic niacin

• previous bariatric surgery

Related Conditions & MeSH terms

• Obesity
• Obesity, Morbid

Intervention

Procedure:
• omentectomy
RYGB with omentectomy

Locations

Country	Name	City	State
United States	Vanderbilt University Medical Center	Nashville	Tennessee

Sponsors (2)

Lead Sponsor	Collaborator
Vanderbilt University Medical Center	National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Country where clinical trial is conducted

United States, 

References & Publications (8)

Albaugh VL, Flynn CR, Cai S, Xiao Y, Tamboli RA, Abumrad NN. Early Increases in Bile Acids Post Roux-en-Y Gastric Bypass Are Driven by Insulin-Sensitizing, Secondary Bile Acids. J Clin Endocrinol Metab. 2015 Sep;100(9):E1225-33. doi: 10.1210/jc.2015-2467. — View Citation

Fabbrini E, Tamboli RA, Magkos F, Marks-Shulman PA, Eckhauser AW, Richards WO, Klein S, Abumrad NN. Surgical removal of omental fat does not improve insulin sensitivity and cardiovascular risk factors in obese adults. Gastroenterology. 2010 Aug;139(2):448 — View Citation

Hajri T, Tao H, Wattacheril J, Marks-Shulman P, Abumrad NN. Regulation of adiponectin production by insulin: interactions with tumor necrosis factor-a and interleukin-6. Am J Physiol Endocrinol Metab. 2011 Feb;300(2):E350-60. doi: 10.1152/ajpendo.00307.20 — View Citation

Knuth ND, Johannsen DL, Tamboli RA, Marks-Shulman PA, Huizenga R, Chen KY, Abumrad NN, Ravussin E, Hall KD. Metabolic adaptation following massive weight loss is related to the degree of energy imbalance and changes in circulating leptin. Obesity (Silver — View Citation

Saliba J, Kasim NR, Tamboli RA, Isbell JM, Marks P, Feurer ID, Ikizler A, Abumrad NN. Roux-en-Y gastric bypass reverses renal glomerular but not tubular abnormalities in excessively obese diabetics. Surgery. 2010 Feb;147(2):282-7. doi: 10.1016/j.surg.2009 — View Citation

Tamboli RA, Breitman I, Marks-Shulman PA, Jabbour K, Melvin W, Williams B, Clements RH, Feurer ID, Abumrad NN. Early weight regain after gastric bypass does not affect insulin sensitivity but is associated with elevated ghrelin. Obesity (Silver Spring). 2 — View Citation

Tamboli RA, Hajri T, Jiang A, Marks-Shulman PA, Williams DB, Clements RH, Melvin W, Bowen BP, Shyr Y, Abumrad NN, Flynn CR. Reduction in inflammatory gene expression in skeletal muscle from Roux-en-Y gastric bypass patients randomized to omentectomy. PLoS — View Citation

Tamboli RA, Hossain HA, Marks PA, Eckhauser AW, Rathmacher JA, Phillips SE, Buchowski MS, Chen KY, Abumrad NN. Body composition and energy metabolism following Roux-en-Y gastric bypass surgery. Obesity (Silver Spring). 2010 Sep;18(9):1718-24. doi: 10.1038 — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	change in insulin sensitivity		5 year
Secondary	Weight loss		5 years