Endothelial Function and Progenitor Cells in Acute Ischemic Stroke (EPCAS)

February 3, 2011 updated by: Charite University, Berlin, Germany
The purpose of this study is to determine whether levels of circulating endothelial progenitor cells (cEPC) are increased in the acute phase of ischemic stroke.

Study Overview

Status

Status

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

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.

Detailed Description

Endothelial dysfunction is a key component of atherosclerosis which contributes to the development of cardio- and cerebrovascular diseases. However, endothelial dysfunction (ED) is not established as a risk factor for ischemic stroke.

As a novelty the proposed trial investigates the following variety of indirect markers of endothelial function in acute ischemic stroke:

circulating endothelial progenitor cells (EPC), endothelial microparticles (EMP), ENDOPAT (RH- PAT ratio) in two regards:

  1. time after ischemic events (< 48h, Days 4-5, day 7 or at discharge)
  2. etiological stroke subtypes

It is not known whether these parameters are changed after acute cerebral ischemia and could possibly serve as specific target for treatment.

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 (Anticipated)

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.
30

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 Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Germany
      • Berlin, Germany, 10117
        • Recruiting
        • Center for Stroke Research Berlin
        • Contact:
        • Principal Investigator:
          • Thomas Liman, MD

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 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with first-ever ischemic stroke transferred to our stroke unit

Description

Inclusion Criteria:

  • Patients with first ever ischemic stroke
  • TIA, or transient symptoms with infarction (TSI)
  • Age > or = 18 years old within 24 hours after onset
  • Written informed consent to participate
  • No evidence for dysphagia

Exclusion Criteria:

  • Malignant hematopoietic disease (e.g. leukemia), severe systemic infections, severe immunological disease, renal or hepatic failure
  • Pancreatitis, cholecystolithiasis, intestinal malabsorption
  • Lactose intolerance
  • Increased risk of aspiration
  • Pregnancy
  • Life expectancy less than 12 months
  • Inability to give written informed consent
  • Psychosis
  • Alcohol dependency
  • Abuse of illegal 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

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.
first-ever ischemic stroke
first-ever ischemic stroke according to the WHO definition

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
Levels of cEPC
Time Frame: <48h, day 4-5, discharge or day 7
Levels of cEPC (CD34+/CD133+/VEGF2R+/CD31) in % of mononuclear cells using flow cytometry with respect to stroke subtypes.
<48h, day 4-5, discharge or day 7

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Levels of EMP
Time Frame: <48h, day 4-5, day 7 or discharge
Levels of EMP (Annexin V+/CD31+; CD62E+) using flow cytometry with respect to stroke subtypes.
<48h, day 4-5, day 7 or discharge
ENDOPAT
Time Frame: <48h, day 4-5,day 7
Digital pulse volume change (with RH PAT as non invasive measurement (PAT-ratio; ENDOPAT, Itamar Medical Ltd.) for non-invasive, peripheral endothelial function
<48h, day 4-5,day 7

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.
Charite University, Berlin, Germany

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: Matthias Endres, MD, Center for Stroke Research Berlin

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.
July 1, 2010

Primary Completion (Anticipated)

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.
December 1, 2011

Study Completion (Anticipated)

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.
June 1, 2012

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 3, 2011

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.
February 3, 2011

First Posted (Estimate)

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.
February 4, 2011

Study Record Updates

Last Update Posted (Estimate)

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 4, 2011

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 3, 2011

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.
January 1, 2011

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.
  • FF_NCRC_EPC01
  • 2009-010356-97 (EudraCT Number)

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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