Cholesterol Metabolism and Lipid Transfer in Diabetes

November 6, 2009 updated by: University of Sao Paulo General Hospital

Plasma Kinetics Study of Free Cholesterol and Cholesteryl Ester in Type 2 Diabetes Mellitus Patients

The diabetic dyslipidemia is one of the most important risk factor in the development of coronary artery disease. The low density lipoprotein (LDL)-like nanoemulsions is being used to study the clearance of cholesteryl ester and free cholesterol from intravascular in patients with advanced coronary artery disease and it was shown a higher removal of free cholesterol and higher deposit in vases of this patients. The aim of this study is to analyze the plasma kinetics of both forms of cholesterol(free ad esterified) in type 2 diabetes patients without a previous history of cardiovascular disease.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Hypercholesterolemia is not typical of type 2 diabetes mellitus dyslipidemia, but alterations in LDL may occur related to atherogenesis.Cholesterol exist in two main forms in organism: free cholesterol and the esterified cholesterol. An artificial model to study this two forms of cholesterol is the use of LDL-like nanoemulsion doubly labeled with 14C-cholesteryl esters and 3H- cholesterol. This nanoemulsion is made without protein and when in the intravascular compartment it is able to acquires apolipoproteins from others lipoproteins, such apos A's, C's and E. This model allowed us to use the nanoemulsion particle as a probe to study the lipoproteins receptor binding and the cholesterol esterification process.

Study Type

Observational

Enrollment (Actual)

26

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
      • São Paulo, Brazil, 05423000
        • Endocrinology Service and Lipid Laboratory of Heart Institute of University of São Paulo

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

40 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

outpatient of the endocrinology clinics of Hospital das clinicas of University of São Paulo Medical school

Description

Inclusion Criteria:

  • without a previous cardiovascular disease
  • if arterial hypertension, or in use of antihypertensive drugs- it must be well controled with a systolic Blood pressure level <130mmHg and diastolic <85mmHg.
  • total cholesterol < 6 mmol/L
  • LDL- cholesterol <4 mmol/L

Exclusion Criteria:

  • use of drugs- statins, fibrates, glucocorticoids, thiazolidinediones
  • nephropathy- the presence of microalbuminuria(ratio of microalbuminuria/creatinin >30 ug/mg) or serum creatinin above 98umol/L in woman and above 115 umol/L in man
  • retinopathy
  • neuropathy presence of chronic disease: heart failure, chronic obstructive pulmonary disease, inflammatory disease and cancer

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Control
  • Time Perspectives: Cross-Sectional

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
type 2 diabetes
patients with diagnosis of Type 2 diabetes mellitus
Other: Plasma kinetic study
this study is done with the injection of LDL-like nanoemulsion doubly labeled with 14C- cholesteryl oleate and 3H- cholesterol, with a total radioactivity injection dose of 0.03mSV. Blood sample collected in a pre established period of time in 24 hours.
Other Names:
  • LDL-like nanoemulsion
Control
non type 2 diabetes mellitus
Other: Plasma kinetic study
this study is done with the injection of LDL-like nanoemulsion doubly labeled with 14C- cholesteryl oleate and 3H- cholesterol, with a total radioactivity injection dose of 0.03mSV. Blood sample collected in a pre established period of time in 24 hours.
Other Names:
  • LDL-like nanoemulsion

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
to identify the removal of the free and esterified cholesterol in type 2 diabetes patients
Time Frame: day of test
day of test

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Sao Paulo General Hospital

Collaborators

Fundação de Amparo à Pesquisa do Estado de São Paulo

Investigators

  • Principal Investigator: Antonio C Lerario, MD, pHD, University of Sao Paulo

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2006

Primary Completion (Actual)

January 1, 2009

Study Completion (Actual)

May 1, 2009

Study Registration Dates

First Submitted

November 6, 2009

First Submitted That Met QC Criteria

November 6, 2009

First Posted (Estimate)

November 9, 2009

Study Record Updates

Last Update Posted (Estimate)

November 9, 2009

Last Update Submitted That Met QC Criteria

November 6, 2009

Last Verified

November 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • LIPIDSDM

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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