EMT in Peritoneal Dialysis Patients

February 23, 2021 updated by: University of Colorado, Denver

Epithelial to Mesenchymal Transition (EMT) in Peritoneal Dialysis Patients

Approximately 10-11% of end stage kidney disease patients worldwide utilize peritoneal dialysis (PD) as their method of renal replacement therapy. Over time, the peritoneal membrane often undergoes anatomic and functional changes due to the process of epithelial to mesenchymal transition (EMT). EMT is characterized by increases in pro-inflammatory and pro-angiogenic cytokines. In this process, the mesothelial cells lining the peritoneal membrane are denuded and change their morphology to one more closely resembling fibroblasts. These fibroblasts invade the submesothelial zone of the peritoneal membrane resulting in marked fibrosis, and the pro-angiogenic cytokines cause an increase in neovascularization. Jointly, these processes culminate in impaired function of the peritoneal membrane and often limit the duration of effective PD therapy.

In vitro studies in cultured human peritoneal mesothelial cells (HPMCs) and in vivo studies in rodent models of PD have demonstrated that the use of active Vitamin D receptor agonists or statins may attenuate this process of EMT. These are both classes of drugs that are commonly in use by patients on PD. The investigators goal is to determine whether either or both of these drugs might attenuate the process of EMT in patients performing PD.

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.

Detailed Description

Patients will perform a standard 2 Liter overnight dwell with the usual 2.5% dextrose PD solution. This will be done the night before a routinely scheduled visit to the home dialysis clinic. In the clinic the fluid will be drained in usual fashion and the fluid- which would otherwise be discarded- will be analyzed as below:

HPMCs will be isolated as previously described by Kinashi et al. and stored at -80 degrees until analysis. Changes in the protein expression of EMT markers such as E-cadherin, alpha smooth muscle actin (a-SMA), Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.

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.
Observational

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.
22

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

  • United States
    • Colorado
      • Aurora, Colorado, United States, 80045
        • University of Colorado Anschutz Medical Campus

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 to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

PD patients > 18 years old. We propose to study 4 groups of 6 patients each:

  1. Patients taking neither an active Vitamin D analogue nor a statin
  2. Patients already taking an active Vitamin D analogue
  3. Patients already taking a statin
  4. Patients already taking both an active Vitamin D analogue and a statin

Description

Inclusion Criteria:

  • Patients > 18 years of age
  • Patients on Peritoneal dialysis, and
  • Patients that meet at least one of the criteria noted in the Population Description.

Exclusion Criteria:

  • Patients with Recent peritonitis

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
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.
Control
Patients on neither active Vitamin D or a statin
Diagnostic test: Isolation of peritoneal mesothelial cells
HPMCs will be isolated and stored at -80 degrees until analysis. Changes in the protein expression of EMT markers such as E-cadherin, a- SMA, Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.
Vit D
Patients on active Vitamin D but not a statin
Diagnostic test: Isolation of peritoneal mesothelial cells
HPMCs will be isolated and stored at -80 degrees until analysis. Changes in the protein expression of EMT markers such as E-cadherin, a- SMA, Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.
Statin
Patients on a statin but not active Vitamin D
Diagnostic test: Isolation of peritoneal mesothelial cells
HPMCs will be isolated and stored at -80 degrees until analysis. Changes in the protein expression of EMT markers such as E-cadherin, a- SMA, Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.
D + Statin
Patients on both active Vitamin D and a statin
Diagnostic test: Isolation of peritoneal mesothelial cells
HPMCs will be isolated and stored at -80 degrees until analysis. Changes in the protein expression of EMT markers such as E-cadherin, a- SMA, Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.

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
Changes in the protein expression of EMT markers
Time Frame: One year or at the end of the study, whichever occurs first.
The goal of this study is to determine whether either or both of these drugs, Vitamin D receptor agonists or statins, might attenuate the process of EMT in peritoneal mesothelial cells. Changes in the protein expression of EMT markers such as E-cadherin, a- SMA, Snail, and fibronectin in the HPMCs will be evaluated by Western blot analysis.
One year or at the end of the study, whichever occurs first.

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.
University of Colorado, Denver

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Isaac Teitelbaum, MD, University of Colorado, Denver

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)

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.
March 20, 2018

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.
May 22, 2019

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.
May 22, 2019

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).
February 26, 2018

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.
March 1, 2018

First Posted (Actual)

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.
March 8, 2018

Study Record Updates

Last Update Posted (Actual)

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.
February 25, 2021

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.
February 23, 2021

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.
February 1, 2021

More Information

Terms related to this study

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.
  • 18-0401

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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