Dissecting Host-microbiome Modifiers of Type 2 Diabetes Risk (DBBIOTE)

August 4, 2023 updated by: André Marette, Laval University
It is now well documented that changes in gut microbiota composition accompany obesity and type 2 diabetes (T2D) and contribute to low-grade inflammation, insulin resistance,and glucose intolerance. It is not yet clear if T2D predisposes the intestine to allow more microbial products or possibly live bacteria to subvert the gut mucosal barrier. However, it is known that hyperglycemia during T2D induces a more permissive gut barrier allowing increased penetration of microbes and their products into the blood. An important next step is to determine which strains of bacteria promote dysbiosis, allowing bacteria or bacterial components to subvert the gut barrier and alter glucose control. It is hypothesized that gut microbes in the colon and other lower gut segments are key modulators of energy balance, glucose homeostasis and insulin sensitivity.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

The gut acts as a barrier to bacteria and nutrients and participates in glucose homeostasis via endocrine actors and the gut-brain-peripheral axis. It is unclear how T2D alters microbes in upper and lower intestine of humans. Studies in animals show that T2D promotes translocation of microbes to the blood and tissues to promote metabolic dysfunction. It is crucial to determine whether bacteria or their components subvert the gut barrier in human T2D, and then to identity the relevant bacterial strains in tissues that control blood glucose. The overall objective of our research program is to demonstrate that specific microbes in the gut, circulation, and key metabolic tissues are involved in the progression of T2D. We will define the microbial signatures of T2D in duodenal biopsies and stool samples by comparing T2D and non-T2D subjects.

Study Type

Interventional

Enrollment (Estimated)

40

Phase

  • Not Applicable

Contacts and Locations

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

Study Contact

Study Locations

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

Yes

Description

Inclusion Criteria:

  • T2DB de novo or non T2DB patients

Exclusion Criteria:

  • oral hypoglycemic agents or lipidlowering or antihypertensive drugs

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

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Type 2 Diabetes patients
Upper gut biopsies and lower gut samples
Procedure: Endoscopy and duodenal biopsy and sampling
All volunteers will have endoscopy and duodenal biopsy and will have to provide stool samples
Active Comparator: Non Type 2 Diabetes patients
Upper gut biopsies and lower gut samples
Procedure: Endoscopy and duodenal biopsy and sampling
All volunteers will have endoscopy and duodenal biopsy and will have to provide stool samples

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Microbial signature
Time Frame: One week
Compare the bacterial profile of T2D and non-T2D subjects
One week

Collaborators and Investigators

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

Sponsor

Laval University

Investigators

  • Principal Investigator: André Marette, PhD, Laval University

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 (Actual)

February 1, 2021

Primary Completion (Estimated)

December 1, 2024

Study Completion (Estimated)

December 1, 2024

Study Registration Dates

First Submitted

October 6, 2020

First Submitted That Met QC Criteria

October 7, 2020

First Posted (Actual)

October 8, 2020

Study Record Updates

Last Update Posted (Actual)

August 7, 2023

Last Update Submitted That Met QC Criteria

August 4, 2023

Last Verified

August 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CMI2 CHU

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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