NEFA (Non Esterified Fatty Acid) , Adipose Factors Behind Insulin Sensitivity

This study is currently recruiting participants.
Verified March 2014 by Karolinska Institutet
Danderyd Hospital
Ersta Hospital, Sweden
Karolinska University Hospital
Information provided by (Responsible Party):
Erik Näslund, Karolinska Institutet Identifier:
First received: November 12, 2012
Last updated: March 11, 2014
Last verified: March 2014

We want to asses the role of adipose tissue for metabolic complications to obesity before and after weight loss (surgery).

Condition Intervention
Non-obese Controls
Other: Obese
Other: Control group

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
Official Title: The Role of Adipose Tissue in Atherogenic Conditions in Man - Mechanisms and Interventions

Resource links provided by NLM:

Further study details as provided by Karolinska Institutet:

Primary Outcome Measures:
  • Insulin sensitivity, adipose tissue function and gene function [ Time Frame: two years after surgery ] [ Designated as safety issue: No ]
    Performed with hyperinsulinemic euglycemic clamp before and two years after surgery. Subcutaneous and visceral fat biopsy at the time of surgery.

Secondary Outcome Measures:
  • Body composition [ Time Frame: two years after surgery ] [ Designated as safety issue: No ]
    DEXA (Dual-Energy X-ray absorptiometry), before and two years after surgery

  • Vascular function [ Time Frame: two years after surgery ] [ Designated as safety issue: No ]
    Non invasive ultrasound of vascular stiffness, before and two years after surgery

Estimated Enrollment: 500
Study Start Date: November 2011
Estimated Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Obese patients undergoing gastric by-pass surgery
Other: Obese
gastric bypass
Control group
Cholecystectomy and anti-reflux surgery
Other: Control group
Cholecystectomy and anti-reflux surgery


Ages Eligible for Study:   18 Years to 60 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria obese:

  • Bariatric surgery with laparoscopic gastric by-pass

Exclusion Criteria obese:

  • diabetes mellitus typ 2 with insulin treatment and/or glitazones
  • oral or parenteral steroid treatment
  • complicated psychiatric disease
  • Warfarin use

Inclusion Criteria non-obese controls:

  • BMI under 30

Exclusion Criteria non-obese controls:

  • diabetes
  • oral or parenteral steroids treatment
  • complicated psychiatric disease
  • Warfarins use
  Contacts and Locations
Please refer to this study by its identifier: NCT01727245

Contact: Erik Näslund, Prof. +46 8 123 550 17
Contact: Mikael Ryden, Ass. Prof +46 8 5858 2775

Danderyds Hospital Recruiting
Stockholm, Sweden, 182 88
Contact: Erik Näslund, Prof.    +46 8 123550 17   
Principal Investigator: Erik Näslund, Prof.         
Ersta Hospital Recruiting
Stockholm, Sweden, 116 91
Contact: Anders Thorell, Ass. Prof.    +46 8 714 6541   
Sub-Investigator: Anders Thorell, Ass. Prof.         
Karolinska University Hospital Recruiting
Stockholm, Sweden, 141 86
Contact: Mikael Ryden, Ass. Prof.    +46 8 5858 2775   
Sub-Investigator: Mikael Ryden, Ass. Prof.         
Sponsors and Collaborators
Karolinska Institutet
Danderyd Hospital
Ersta Hospital, Sweden
Karolinska University Hospital
Principal Investigator: Erik Näslund, Prof. Karolinska Institutet
  More Information

No publications provided

Responsible Party: Erik Näslund, Professor, Karolinska Institutet Identifier: NCT01727245     History of Changes
Other Study ID Numbers: 2011/1002-31/1
Study First Received: November 12, 2012
Last Updated: March 11, 2014
Health Authority: Sweden: The National Board of Health and Welfare

Additional relevant MeSH terms:
Insulin Resistance
Nutrition Disorders
Body Weight
Signs and Symptoms
Glucose Metabolism Disorders
Metabolic Diseases processed this record on April 16, 2014