Role of Endoplasmic Reticulum Stress in the Pathophysiology of Type 2 Diabetes (GLUCOSTRESS)

April 15, 2016 updated by: Assistance Publique - Hôpitaux de Paris

The purpose of this study is to investigate whether Endoplasmic Reticulum (ER) stress pathway is activated in peripheral tissues (adipose tissue) in insulin resistant diabetic patients compared to healthy subjects normoglycemic matched for age and sex an to investigate whether ER stress pathway can be activated in response to insulin. Indeed, some preliminar on rates studies shows that ER stress pathway is activated by insulin in liver and adipose tissue showing that hyperinsulinemia might help trigger stress path ER.

For this, we propose a case control study of type 2 diabetic patients vs control subjects in which markers of ER stress will be evaluated from abdominal subcutaneous adipose tissue obtained before and after euglycemic hyperinsulinemic. We chose to consider adipose tissue subcutaneous rather than visceral adipose tissue for obvious reasons of lesser invasiveness.

Study Overview

Status

Unknown

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

40

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

      • Paris, France, 75010
        • Saint-Louis Hospital

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

18 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with type 2 diabetes Healthy volunteers Adults

Description

Inclusion Criteria:

  • Specific criteria for diabetic patients:
  • Having type 2 diabetes for at least 6 months
  • HbA1c ≤ 8%
  • Treated by lifestyle and dietary rules associated or not to a hypoglycemic therapy (metformin and / or sulfamid) and / or insulin secretors dependent glucose as inhibitors of DPP4 (dipeptidyl peptidase-4): Vildagliptin, Sitagliptin, Saxagliptin
  • No modification of hypoglycemic therapy and / or insulin secretors for at least 3 months

Specific criteria for control subjects:

  • Nondiabetic subjects (fasting blood glucose <7.0 mmol / l without hypoglycemic treatment).
  • The control subjects should be matched to patients for age (± 5 years), sex, and BMI (± 2 kg/m2).

Common criteria for patients and control subjects:

  • Aged 18 to 60 years
  • Body Mass Index between 25 and 35 kg/m2
  • Accepting the constraints of the protocol and who signed the informed consent
  • Systolic blood pressure < 160 mmHg, diastolic blood pressure < 90 mm Hg (with or without antihypertensive treatment)
  • Resting heart rate between 55 and 100 beats/min.
  • Normal laboratory tests or not clinically significant abnormality for NFS platelets, PT, aPTT, fibrinogen ALT, AST, GGT, Serum electrolytes, urea, creatinine, Uric acid Triglycerides, total cholesterol, HDL cholesterol
  • HCG negative blood (for female subjects)
  • Affiliated to the Social Security.

Exclusion Criteria:

  • Current infections or recent infections (<10 days)
  • Neoplastic disorders (with the exception of carcinoma in situ of the cervix or cutaneous epithelioma), haematological, cardiovascular, psychiatric, neurological
  • Poisoning smoking (>10 cigarettes per day, what ever the duration of intoxication)
  • Treatment with insulin or glitazones Pregnancy, Breastfeeding
  • Body Mass Index > 35 kg/m2
  • Any drug taken for less than 8 days without the inclusion of minor analgesics (aspirin, paracetamol), anti-hypertensive medications, oral hypoglycemic (metformin and sulphonylureas) and insulin secretors dependent glucose as inhibitors of DPP4 (dipeptidyl peptidase-4) and oral contraceptives.

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
control

control subjects with :

  • Nondiabetic subjects (blood glucose <7.0 mmol/l without hypoglycemic treatment).
  • The control subjects should be matched to patients for age (± 5 years), sex, and BMI (± 2 kg/m2).
case

Diabetic patients with :

  • Having type 2 diabetes for at least 6 months
  • HbA1c ≤ 8%
  • Treat by lifestyle and dietary rules associated or not to a hypoglycemic therapy (metformin and / or sulfamid) and / or insulin secretors dependent glucose as inhibitors of DPP4 (dipeptidyl peptidase-4): Vildagliptin, Sitagliptin, Saxagliptin
  • No modification of hypoglycemic therapy and / or insulin secretors for at least 3 months

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Show an increase in markers of ER stress in fasting patients with type 2 diabetes
Time Frame: 2 days
Protein expression markers of ER stress pathway BiP / GRP 78, CHOP, ATF4 EDEM and XBP-1
2 days

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Assess whether insulin induces an increase in markers of ER stress
Time Frame: 2 days
Insulin sensitivity
2 days
Insulin secretion in response to glucose infusion
Time Frame: 2 days
2 days
Insulin secretion in response to arginine infusion
Time Frame: 2 days
2 days
Lipolysis on insulin
Time Frame: 2 days
2 days

Collaborators and Investigators

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

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

November 1, 2012

Primary Completion (Anticipated)

November 1, 2016

Study Completion (Anticipated)

November 1, 2016

Study Registration Dates

First Submitted

February 15, 2015

First Submitted That Met QC Criteria

February 20, 2015

First Posted (Estimate)

February 23, 2015

Study Record Updates

Last Update Posted (Estimate)

April 18, 2016

Last Update Submitted That Met QC Criteria

April 15, 2016

Last Verified

April 1, 2016

More Information

Terms related to this study

Other Study ID Numbers

  • GLUCOSTRESS P 08 11 22

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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