- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00210977
A Study of Patients Treated With Erythropoietin Receptor Agonists for Anemia Who Developed Anti-erythropoietin Antibodies
August 29, 2013 updated by: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
An Observational Study of Subjects Treated With Erythropoietin Receptor Agonists for Anemia Who Developed Anti-erythropoietin Antibodies
The purpose of this study is to assess the presence of anti erythropoietin antibodies (anti EPO Ab) in participants responding to any erythropoietin receptor agonist (ERA) therapy to treat or prevent anemia without loss of effectiveness to see if they will develop pure red cell aplasia or loss of effectiveness to recombinant erythropoietin and to measure the duration of effectiveness of ERA therapy.
Study Overview
Detailed Description
This is an observational (study in which the investigators/physicians observe the participant's data and measure their outcomes), international, multicenter (study conducted at multiple sites), cohort (group of individuals with similar characteristics) study.
The study consists of prestudy phase, observational phase (2 years), and follow-up phase (1 year).
Approximately 50 participants who already receiving ERA therapy for anemia will be observed in this study.
In the observational phase, participants' erythropoietin antibody status (positive or negative), clinical progress, treatment for anemia or prevention of anemia, and outcome will be monitored.
During this study, enrolled participants will continue to receive standard-of-care treatment for their disease from their individual investigators as before enrollment to this study.
Safety evaluations will include assessment of adverse events which will be monitored throughout the study.
The total duration of the study will be 3 years.
Study Type
Observational
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
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Participants with positive or borderline serum anti erythropoietin antibody titer and who are responding to any erythropoietin receptor agonist (ERA) therapy for any cause of anemia
Description
Inclusion Criteria:
- Receiving any ERA therapy for any cause of anemia and having responded to the ERA therapy for at least 3 months
- Positive or borderline serum for antibodies to erythropoietin identified by serum radioimmunoprecipitation
- Maintained a stable hemoglobin within a 3-month period that has not decreased more than 2 g/dL in any 1-month period and with no increase in red blood cell transfusion requirement
- An ERA maintenance dose that has not increased more than 50 percentages from initial effective dose
- If blood count information is available, must have a count of reticulocytes (immature red blood cells) greater than or equal to 30 million/L
Exclusion Criteria:
- Stem cell or bone marrow transplantation
- Treatment with medication that decreases the ability of the immune system to function normally, within the last 3 months
- Participants who have shown a loss of effectiveness to ERA therapy, defined as participants who initially responded to treatment for anemia [a rise in hemoglobin which lasted for a minimum of 3 months] followed by an unexplained decrease in hemoglobin (greater than or equal to 2 g/dL) within a 1-month period
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 |
Intervention / Treatment |
---|---|
Erythropoietin receptor agonist
Participants with borderline serum anti erythropoietin (EPO) antibody (Ab) titers and who are treated with any erythropoietin receptor agonist (ERA) for any indication, having anti-EPO Ab identified by radioimmunoprecipitation (RIP), who are responding to ERA therapy, will be included in the study.
|
This is an observational study.
All participants will be maintained on their regular dose regimen of standard-of-care treatment, under the guidance of the treating physician/investigator.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Participants With Presence of Anti-Erythropoietin Antibodies (anti-EPO Ab)
Time Frame: Up to 2 years
|
An antibody is a large Y-shaped protein secreted into the blood and is used by the immune system to identify and neutralize foreign objects such as bacteria and viruses.
Presence of anti-EPO Ab will help to find out participant's progress to the outcomes loss of effectiveness, suspected pure red cell aplasia, or confirmed pure red cell aplasia.
|
Up to 2 years
|
Duration of Effectiveness of Erythropoietin Receptor Agonist Therapy
Time Frame: Up to 2 years
|
Up to 2 years
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Concentration of Plasma Anti Erythropoietin Antibody
Time Frame: Up to 2 years
|
Up to 2 years
|
Factors That Forecast Progression to Loss of Effectiveness
Time Frame: Up to 2 years
|
Up to 2 years
|
Factors That Forecast Progression to Suspected Pure Red Cell Aplasia
Time Frame: Up to 2 years
|
Up to 2 years
|
Factors That Forecast Progression to Confirmed Pure Red Cell Aplasia
Time Frame: Up to 2 years
|
Up to 2 years
|
Number of Participants With Adverse Events
Time Frame: Up to 3 years
|
Up to 3 years
|
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
December 1, 2005
Primary Completion (Anticipated)
January 1, 2010
Study Completion (Anticipated)
January 1, 2010
Study Registration Dates
First Submitted
September 13, 2005
First Submitted That Met QC Criteria
September 13, 2005
First Posted (Estimate)
September 21, 2005
Study Record Updates
Last Update Posted (Estimate)
September 2, 2013
Last Update Submitted That Met QC Criteria
August 29, 2013
Last Verified
August 1, 2013
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- CR003277
- EPO-IMU-302 (Other Identifier: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.)
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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