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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02227043
Other study ID # SOWOT
Secondary ID
Status Completed
Phase N/A
First received August 22, 2014
Last updated March 1, 2017
Start date September 2014
Est. completion date March 1, 2017

Study information

Verified date March 2017
Source Karolinska Institutet
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The investigators will study the influence of fat cell size/number and adipose function on weight development over very long time periods (years). By comparing fat biopsies obtained at baseline and after >7 years, the investigators will determine the association between adipose morphology/function and changes in weight or development of cardiometabolic complications (e.g. insulin resistance, type 2 diabetes, dyslipidemia and hypertension).


Description:

The investigators will ask all subjects that have previously been examined at the investigators laboratory (from 1992 and forward) in studies of adipose tissue function if they are interested to participate in a new study. The minimal follow up time is 7 years.

Saved blood samples and samples from old fat biopsies will be analyzed together with samples from new examinations.

The investigators plan to examine the subjects in the same way as performed at the baseline examinations. This includes estimation of total body fat using bioimpedance, venous blood samples for determination of insulin, glucose and lipids, subcutaneous fat biopsies with determination of fat cell size/number, lipolysis/lipogenesis as well as analysis of adipokine secretion.

In selected patients, baseline examinations included DEXA-measurement (dual energy x-ray absorptiometry) for determination of body fat distribution as well as hyperinsulinemic euglycemic clamp. In these cases, the same type of examinations will be repeated at their follow up visits.


Recruitment information / eligibility

Status Completed
Enrollment 105
Est. completion date March 1, 2017
Est. primary completion date March 1, 2017
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 24 Years to 90 Years
Eligibility Inclusion Criteria:

- Participated in previous examination at our lab at least 7 years ago.

- No blood samples or adipose samples saved from last examination

Exclusion Criteria:

- Decline to participate after invitation.

- Serious illness or mental disorder.

- Warfarin or other new oral anticoagulant that increase risk of bleeding.

Study Design


Locations

Country Name City State
Sweden Lipid laboratory Karolinska University Hospital Huddinge Stockholm

Sponsors (2)

Lead Sponsor Collaborator
Karolinska Institutet Stockholm County Council, Sweden

Country where clinical trial is conducted

Sweden, 

Outcome

Type Measure Description Time frame Safety issue
Primary Weight development over time and correlation to adipose morphology Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years (84 months). Weight will be assessed with a regular scale and adipose morphology will be determined by measurement of fat cell size and adjustment for body weight. from 2014 up to 2024, up to 10 years
Primary Weight development and correlation to lipolysis Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years. Weight will be assessed with a regular scale. Fat cells will be isolated and assessment of lipolysis will be made with previously published standardized protocols. 2014 to 2024, up to 10 years
Primary Weight development and correlation to lipogenesis Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years. Weight will be assessed with a regular scale and lipogenesis will be measured according to previously published standardized protocol after isolated fat cells have been stimulated with insulin. 2014 to 2024, up to 10 years
Secondary adipose tissue morphology development and insulin sensitivity Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years. Adipose morphology will be determined by measurement of fat cell size and adjustment for body weight. Insulin sensitivity will be assessed by measurement of glucose and insulin and in some cases also hyperinsulinemic euglycemic clamp. 2014 to 2024, up to 10 years
Secondary adipose morphology and changes in fat mass Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years. Adipose morphology will be determined by measurement of fat cell size and adjustment for body weight. Fat mass will be assessed by impedance measurement and in some cases DEXA according to previously published protocols. 2014 to 2024, up to 10 years
Secondary adipose morphology and development of fat mass Recruitment of these subjects will continue until 2024 with a minimum follow up time of 7 years. Fat mass will be assessed by impedance measurement and in some cases DEXA according to previously published protocols. 2014 to 2024, up to 10 years
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