Adipose Tissue & Uremia (MODAIR)

September 2, 2025 updated by: Hospices Civils de Lyon

Morphological and Functional Changes in White Adipose Tissue in Nondiabetic Chronic Kidney Disease Patients

Many metabolic disturbances, such as protein-energy wasting, inulin resistance, and dyslipidemia are common features of chronic kidney disease (CKD). However, to date, the underlying mechanisms of these disturbances remain elusive. Many in vitro studies have demonstrated that white adipose cells exhibit dysfunctions in conditions that mimics uremic environment. In good agreement, several animal experiments have reported that chronic kidney disease was associated with lipoatrophy, adipose tissue dysfunction and ectopic lipid redistribution. The goal of this protocol is to collect and study structural and metabolic properties of white adipose tissue in CKD stage V patients to evidence adipose tissue dysfunction associated with CKD. The primary outcome measure will be the cellularity of the adipose tissue (i.e. size of the adipose cells) and the secondary measure to study the gene expression profile using microarray and metabolic properties of adipose tissue (i.e. lipogenesis). To this end, 15 male adult volunteers and 15 non-diabetic and non-dialyzed CKD stage V patients, matched for age, gender and body mass index (BMI) will be recruited at the Departments of Nephrology or Urology of Lyon University Hospital (Lyon, France). The biopsies of abdominal subcutaneous white adipose tissue (2-3 g) will be performed during elective urologic surgery (i.e. peritoneal dialysis catheter for CKD patients and radical prostatectomy for non CKD patients).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
23

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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 Locations

  • France
      • Lyon, France, 69003
        • Service de Néphrologie, dialyse, hypertension artérielle - Pavillon P - Hôpital Edouard Herriot -

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

CKD (Chronic Kidney Disease) and non-CKD patients:

  • At least 18 years of age
  • Able and willing to provide informed consent
  • Male gender
  • Normal fasting glucose (less than 6 mmol/l )
  • No evidence of significant concurrent illness
  • BMI <30 kg/m2
  • Non acidotic (bicarbonate >20 mmol/L)
  • Normal coagulation profile

CKD patients:

• eGFR (estimated Glomerular Filtration Rate)< 25 mL/min/m2 before the beginning of renal suppletion therapy

Non-CKD patients:

• eGFR >50 mL/min/m2

Exclusion Criteria:

  • A known diagnosis of diabetes mellitus
  • enrolled in a other study that may confound results of this study.
  • Have been treated with: corticosteroids or insulin or oral diabetic medications within 8 days prior to study entry
  • Unwilling and/or not able to give written consent
  • Patient with active systemic bacterial, viral or fungal infections

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: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Chronic Kidney disease patients - stage V
Male adults non-diabetic and non-dialyzed CKD stage 5 patients. All the CKD patient will be recruited at the Department of Nephrology of Edouard Herriot University Hospital (Lyon, France).
Other: Biopsy of abdominal subcutaneous white adipose tissue (2-3 g)
The biopsies of abdominal subcutaneous white adipose tissue (2-3 g) will be performed during elective surgery (i.e. peritoneal dialysis catheter) for CDK patients or during elective urologic surgery (e.g. radical prostatectomy) for Non-CDK patients. 50-100 mg will fixed in osmium tetroxide for cellularity measurement and 1g of fresh adipose tissue were used from adipocyte isolation. The remnant part of the biopsies will be snap frozen in liquid nitrogen and stored at -80°C until use (gene expression).
Other: Non Chronic Kidney Disease patients
Non CKD male adults matched for age, gender and body mass index (BMI) with CKD patients. All the non - CKD patient will recruited from Department of recruited at the Department of Urology of Edouard Herriot University Hospital (Lyon, France).
Other: Biopsy of abdominal subcutaneous white adipose tissue (2-3 g)
The biopsies of abdominal subcutaneous white adipose tissue (2-3 g) will be performed during elective surgery (i.e. peritoneal dialysis catheter) for CDK patients or during elective urologic surgery (e.g. radical prostatectomy) for Non-CDK patients. 50-100 mg will fixed in osmium tetroxide for cellularity measurement and 1g of fresh adipose tissue were used from adipocyte isolation. The remnant part of the biopsies will be snap frozen in liquid nitrogen and stored at -80°C until use (gene expression).

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Mean adipocyte size (in µm) in subcutaneous white adipose tissue removed during biopsy, measured with a Beckman Coulter
Time Frame: Day 1, the day of surgery (one day after inclusion)
The biopsies of abdominal subcutaneous white adipose tissue (2-3 g) will be performed during elective surgery (i.e. peritoneal dialysis catheter for CKD patients and radical prostatectomy for non CKD patients). 50-100 mg will be fixed in osmium tetroxide for cellularity measurement i.e. measurement of adipose cell size. Adipose cell size will be determined by a Beckman Coulter Multisizer IV (Beckman Coulter) with a 400 µm aperture. The range of cell sizes that can effectively be measured using this aperture is 20-240 µm. The instrument will be set to count 1,000 particles, and the fixed-cell suspension will be diluted so that coincident counting remains <10%. Cell-size distributions will be drawn from measurement of at least 12,000 cell diameters for each patient. The mean fat cell volume will then be compared using Student t test or Mann & Whitney U tests.
Day 1, the day of surgery (one day after inclusion)

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Hospices Civils de Lyon

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2009

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
July 1, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
July 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 12, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 12, 2016

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 16, 2016

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 9, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 2, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2008.520

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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