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CompletedNCT00953498Updated Sep 2, 2013

Influence of Glitazones on the Vasodilatory Effect of High-density Lipoprotein (HDL) Lipoproteins

A Phase 4 interventional study of pioglitazone and rosiglitazone in Type 2 Diabetes, sponsored by Centre Hospitalier Universitaire Dijon. Completed at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2013-09-02.

Sponsored by Centre Hospitalier Universitaire Dijon · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

HDL from patients with type 2 diabetes show a significant reduction of their endothelium-dependent vasodilatory effect.

The primary objective of the study is to analyze whether treatment with glitazones (pioglitazone and rosiglitazone)may improve the endothelium-dependent vasodilatory effect of HDL lipoproteins in patients with type 2 diabetes.

The secondary objectives are:

  • to analyze the effect of glitazone treatment on phospholipase A2
  • to look for possible differences between the effects of pioglitazone and those of rosiglitazone
  • to analyze the glycemic response to glitazone therapy according to clinical and biological baseline characteristics.
Read the detailed description

The study will be performed as follows:

At baseline, before initiating glitazone treatment, clinical data will be recorded and blood samples will be obtained for biological measurements (blood glucose, HbA1c, total cholesterol, triglycerides, LDL-cholesterol, HDL-cholesterol, liver enzymes), phospholipase A2 measurement and the study of the vasodilatory effect of HDL particles.For this purpose, we will study,using rabbit aorta rings,the ability of HDL to suppress the inhibition of vasodilation that is induced by oxidised LDL.

For all the patients included into the study, a treatment by pioglitazone (at an initial dose of 30 mg/day) or rosiglitazone (at an initial dose of 4 mg/day) will be given by randomization.

A visit will be performed at week 12, in order to titrate the glitazone dose (up to 45 mg/day for pioglitazone, up to 8 mg/day for rosiglitazone)according to HbA1c level and values of self-monitoring blood glucose.

At week 24, the last visit will take place. During this visit, clinical data will be recorded and blood samples will be obtained for biological measurements (blood glucose, HbA1c, total cholesterol, triglycerides, LDL-cholesterol, HDL-cholesterol, liver enzymes), phospholipase A2 measurement and the study of the vasodilatory effect of HDL particles.

02

Conditions studied

  • Type 2 Diabetes

Keywords

  • diabetes
  • glitazones
  • HDL
03

In context

Diabetes Mellitus, Type 2

9,589 studies on the registry are indexed under Diabetes Mellitus, Type 2; 1,332 are open to participants now.

This study's enrollment of 40 is below the median of 81 across 7,713 interventional studies indexed under Diabetes Mellitus, Type 2.

Browse Diabetes Mellitus, Type 2 studies →

Lead sponsor

Centre Hospitalier Universitaire Dijon is the lead sponsor of 499 studies on the registry; 104 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • patients with type 2 diabetes treated by oral antidiabetic agents (except glitazones) and/or insulin
  • age> 18 years
  • HbA1c > 6.5%

Exclusion criteria

Exclusion Criteria:

  • renal failure
  • heart failure
  • primary hyperlipidemia
  • pregnancy
  • treatment that may modify lipid metabolism (glucocorticoids, oestrogens, retinoids, HIV antiviral drugs)
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • Active comparator
    pioglitazone

    treatment with pioglitazone (dose from 30 mg:day to 45 mg/day)

    Drug: pioglitazone

  • Active comparator
    rosiglitazone

    treatment with rosiglitazone at a dose between 4mg and 8 mg/day

    Drug: rosiglitazone

Interventions

  • After randomization, patients will be treated by pioglitazone or rosiglitazone

    Also known as: pioglitazone: ACTOS, rosiglitazone: AVANDIA

  • treatment with rosiglitazone at a dose between 4mg and 8 mg/day

    Also known as: pioglitazone: ACTOS, rosiglitazone: AVANDIA

06

What researchers measure

Primary outcomes

  1. Action of glitazone on the endothelium-dependent vasodilatory effects of HDL lipoproteins

    Time frame: 6 months

Secondary outcomes

  1. Effect of glitazone therapy on Phospholipase A2 level

    Time frame: 6 months

  2. Analyze the glycemic response to glitazones according to baseline clinical and biological characteristics

    Time frame: 6 months

  3. Look for possible differences between pioglitazone and rosiglitazone for their effects on HDL lipoproteins and phospholipase A2

    Time frame: 6 months

07

Study locations

1 site
  • Service Endocrinologie-diabétologie, Hôpital du Bocage CHU
    Dijon, 21000, France
08

References and documents

Publications

  • Persegol L, Verges B, Foissac M, Gambert P, Duvillard L. Inability of HDL from type 2 diabetic patients to counteract the inhibitory effect of oxidised LDL on endothelium-dependent vasorelaxation. Diabetologia. 2006 Jun;49(6):1380-6. doi: 10.1007/s00125-006-0244-1. Epub 2006 Apr 5. PubMed 16596357 ↗
  • Verges B, Radu L, Baillot-Rudoni S, Brindisi MC, Poussier A, Bouillet B, Petit JM, Duvillard L. Low HDL-cholesterol: a strong predictor of glycemic response to glitazone treatment in patients with type 2 diabetes. Diabetes Res Clin Pract. 2011 Jul;93(1):e44-8. doi: 10.1016/j.diabres.2011.04.005. Epub 2011 May 6. PubMed 21529978 ↗
09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Oct 2007, a primary completion of Mar 2012 and a completion of Mar 2012. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 5, 2009
First posted
Aug 6, 2009
Start
Oct 2007
Primary completionActual
Mar 2012
CompletionActual
Mar 2012
Last update
Sep 2, 2013
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 2, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00953498
Responsible party
Prof. Bruno Vergès (Professor, Centre Hospitalier Universitaire Dijon) — Principal investigator
First posted
Aug 6, 2009
Start date
Oct 2007
Primary completion
Mar 2012
Completion
Mar 2012
Last update
Sep 2, 2013

Study contacts

Bruno L Vergès, MD,PhD
principal investigator · CHU Dijon

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Aug 2013. You cannot join it, but the record below documents what was studied.

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Studies of the drugs tested here: Pioglitazone · Rosiglitazone

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