Hemoglobin MutationsNCT00277849
Collection of Blood From Persons With Hemoglobin and Erythrocyte Polymorphisms for Laboratory Malaria Research
An observational study of Hemoglobin Mutations and Erythrocyte Variants, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.
Trial summary
This study will collect blood samples for use in laboratory studies of malaria. The World Health Organization reports that 40 percent of the world's population is at risk for malaria, mostly in the poorest countries. It is a serious disease caused by parasites. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Hemoglobin Mutations, Erythrocyte Variants
- How many people
- 130 participants
- Where
- 1 siteUnited States
- Study dates
- 11 Jan 2006to 20 Jul 2010
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Normal volunteer or volunteer with a known or suspected erythrocyte mutation.
- Age greater than or equal to 18 and less than or equal to 65 years old.
- Weight greater than 110 pounds.
- Ability to sign the consent form.
- Willingness to comply with study procedures.
Who cannot join
- Transfusion of any blood products within the past 90 days.
- Active bleeding.
- Clinically apparent and/or symptomatic anemia (pallor, orthostasis, etc).
- Self-reported history of HIV, Hepatitis B virus, or Hepatitis C virus infection.
- Severe chronic disease (e.g. end-stage renal failure, malignancy, etc).
- Significant medical history, physical examination, or laboratory test results indicating that the subject should not participate in a clinical trial.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, 20892
About this study
This study will collect blood samples for use in laboratory studies of malaria. The World Health Organization reports that 40 percent of the world's population is at risk for malaria, mostly in the poorest countries. It is a serious disease caused by parasites. Each year, 300-500 million infections lead to more than a million deaths. However, there are traits in red blood cells (erythrocyte) that protect people against malaria. In this study, polymorphism refers to the various kinds of red blood cell traits.
The sickle cell trait is an example of one that seems to offer a natural survival advantage in children where malaria is common. Researchers at the Laboratory of Malaria and Vector Research are investigating ways in which the blood cell traits can offer such protection, and new knowledge gained can bring about medical advances. Of particular importance is studying how the malaria organism, Plasmodium, survives inside different red blood cells. A steady, consistent, and reliable supply of fresh whole blood is necessary for testing.
Read more
Patients 18 to 65, weighing more than 110 lbs. and who do not have anemia or known HIV, Hepatitis C, or Hepatitis B may be eligible for this study.
Patients will undergo a medical history and general assessment including vital signs of temperature, heart rate, and blood pressure. Blood will be collected from a vein in the arm, or rarely a vein in the hand. A complete blood count, or CBC, will be done to ensure that blood levels are sufficient and that blood donation is safe for a patient to do. Patients need to have enough hemoglobin, the part of red blood cells that transports oxygen throughout the body. The blood will also be tested to confirm the type of red blood cell traits of patients. About 1 to 8 tablespoons may be collected, but most blood samples will be small, that is, 1 to 4 teaspoons. After the patients' first visit, sessions will take 5-20 minutes. Blood collection will total no more than 2 cups from a donor during any 6-week period. Although the frequency of blood donations is not known at this time, it is unlikely that a patient will be asked to donate blood more than four times a year. It may be important for patients to undergo a repeat CBC or tests for blood chemistry if results are needed for research. Risks associated with blood collection are considered minimal. They include discomfort, occasional bruising or bleeding at the puncture site, and faintness.
In this study, it is possible that a small amount of blood may be stored for future research, to help the researchers to learn more about malaria. There are no plans for the results from the various research laboratory tests to be made available to patients or to their private doctors. However, patients in this study may discuss the results of routine medical tests with the study investigators. Some of the blood collected will be tested for genetic conditions. Through genetic testing, researchers can learn more about how health or illness may be passed on to people by their parents, or from people to their children. All results of tests will remain confidential. Blood samples will be labeled by code, and reference to patients' identities will be protected.
Participants will receive $50 for each blood donation. This study will not have a direct benefit for participants. Future research that uses their blood samples will help researchers to learn about malaria as well as how to prevent or treat the disease.
Read the detailed description
This protocol is designed to provide a mechanism for investigators in the Laboratory of Malaria and Vector Research (LMVR) to collect and process peripheral blood samples from volunteer donors. Donors who meet standard eligibility criteria will be recruited to donate blood via standard phlebotomy techniques at the NIH Clinical Center.
The LMVR has ongoing in vitro studies to characterize the effects of hemoglobin mutations and erythrocyte polymorphisms on the pathogenesis of Plasmodium falciparum, the agent of the most deadly malaria in humans. G6PD deficiency, hemoglobinopathies such as HbS, HbC, and HbE, and the thalassemias are thought to have evolved as protective traits against malaria in endemic areas of the world. However, the mechanisms by which these mutations exert their protective influence are largely unknown. Culturing P. falciparum in erythrocytes carrying protective traits will allow researchers in LMVR to characterize the cellular and molecular bases of protection using in vitro methods such as growth analyses and electron microscopy. To this effect, patients with known or suspected erythrocyte variants will be recruited in addition to normal controls.
Signed informed consent will be obtained by an authorized investigator. The nature of the study as well as the risks and benefits of the donation process will be explained to each participant. Donors will be compensated for each blood donation or for unsuccessful attempts at venipuncture. Samples will be used solely for in vitro research. To ensure confidentiality, blood will be assigned a unique code; investigators listed on this protocol will serve as the custodians of the codes that link the samples to the donors' identities.
- Conditions
- Hemoglobin Mutations, Erythrocyte Variants
- Keywords
- Sickle, Hemoglobinopathy, Thalassemia, G6PD, Plasmodium, Erythrocyte Variant, Hemoglobin Variant, Healthy Volunteer, HV
- Medical subject headings
- Hemoglobinopathies, Thalassemia, Malaria
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted16 Jan 2006 (estimated)
- Study start11 Jan 2006
- Study completion20 Jul 2010
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Hemoglobin MutationsStudies of the same condition, open and under way.
- More trials run by National Institute of Allergy and Infectious Diseases (NIAID)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 130 participants (estimated)
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00277849
- Sponsor's protocol ID
- 060074
- Other IDs
- 06-I-0074
- Status last verified
- 20 Jul 2010
- First submitted
- 14 Jan 2006
- Last updated
- 2 Jul 2017
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Collection of Blood From Persons With Hemoglobin and Erythrocyte Polymorphisms for Laboratory Malaria Research
- ClinicalTrials.gov ID
- NCT00277849
- Acronym / sponsor ID
- 060074
- Conditions
- Hemoglobin Mutations, Erythrocyte Variants
- Keywords
- Sickle, Hemoglobinopathy, Thalassemia, G6PD, Plasmodium, Erythrocyte Variant, Hemoglobin Variant, Healthy Volunteer
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 130 participants (estimated)
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)US National Institutes of Health
- Study start
- 11 Jan 2006
- Study completion
- 20 Jul 2010
- First posted
- 16 Jan 2006 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will collect blood samples for use in laboratory studies of malaria. The World Health Organization reports that 40 percent of the world's population is at risk for malaria, mostly in the poorest countries. It is a serious disease caused by parasites. Each year, 300-500 million infections lead to more than a million deaths. However, there are traits in red blood cells (erythrocyte) that protect people against malaria. In this study, polymorphism refers to the various kinds of red blood cell traits.
The sickle cell trait is an example of one that seems to offer a natural survival advantage in children where malaria is common. Researchers at the Laboratory of Malaria and Vector Research are investigating ways in which the blood cell traits can offer such protection, and new knowledge gained can bring about medical advances. Of particular importance is studying how the malaria organism, Plasmodium, survives inside different red blood cells. A steady, consistent, and reliable supply of fresh whole blood is necessary for testing.
Patients 18 to 65, weighing more than 110 lbs. and who do not have anemia or known HIV, Hepatitis C, or Hepatitis B may be eligible for this study.
Patients will undergo a medical history and general assessment including vital signs of temperature, heart rate, and blood pressure. Blood will be collected from a vein in the arm, or rarely a vein in the hand. A complete blood count, or CBC, will be done to ensure that blood levels are sufficient and that blood donation is safe for a patient to do. Patients need to have enough hemoglobin, the part of red blood cells that transports oxygen throughout the body. The blood will also be tested to confirm the type of red blood cell traits of patients. About 1 to 8 tablespoons may be collected, but most blood samples will be small, that is, 1 to 4 teaspoons. After the patients' first visit, sessions will take 5-20 minutes. Blood collection will total no more than 2 cups from a donor during any 6-week period. Although the frequency of blood donations is not known at this time, it is unlikely that a patient will be asked to donate blood more than four times a year. It may be important for patients to undergo a repeat CBC or tests for blood chemistry if results are needed for research. Risks associated with blood collection are considered minimal. They include discomfort, occasional bruising or bleeding at the puncture site, and faintness.
In this study, it is possible that a small amount of blood may be stored for future research, to help the researchers to learn more about malaria. There are no plans for the results from the various research laboratory tests to be made available to patients or to their private doctors. However, patients in this study may discuss the results of routine medical tests with the study investigators. Some of the blood collected will be tested for genetic conditions. Through genetic testing, researchers can learn more about how health or illness may be passed on to people by their parents, or from people to their children. All results of tests will remain confidential. Blood samples will be labeled by code, and reference to patients' identities will be protected.
Participants will receive $50 for each blood donation. This study will not have a direct benefit for participants. Future research that uses their blood samples will help researchers to learn about malaria as well as how to prevent or treat the disease.
Detailed description
This protocol is designed to provide a mechanism for investigators in the Laboratory of Malaria and Vector Research (LMVR) to collect and process peripheral blood samples from volunteer donors. Donors who meet standard eligibility criteria will be recruited to donate blood via standard phlebotomy techniques at the NIH Clinical Center.
The LMVR has ongoing in vitro studies to characterize the effects of hemoglobin mutations and erythrocyte polymorphisms on the pathogenesis of Plasmodium falciparum, the agent of the most deadly malaria in humans. G6PD deficiency, hemoglobinopathies such as HbS, HbC, and HbE, and the thalassemias are thought to have evolved as protective traits against malaria in endemic areas of the world. However, the mechanisms by which these mutations exert their protective influence are largely unknown. Culturing P. falciparum in erythrocytes carrying protective traits will allow researchers in LMVR to characterize the cellular and molecular bases of protection using in vitro methods such as growth analyses and electron microscopy. To this effect, patients with known or suspected erythrocyte variants will be recruited in addition to normal controls.
Signed informed consent will be obtained by an authorized investigator. The nature of the study as well as the risks and benefits of the donation process will be explained to each participant. Donors will be compensated for each blood donation or for unsuccessful attempts at venipuncture. Samples will be used solely for in vitro research. To ensure confidentiality, blood will be assigned a unique code; investigators listed on this protocol will serve as the custodians of the codes that link the samples to the donors' identities.
Study design
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Normal volunteer or volunteer with a known or suspected erythrocyte mutation.
- Age greater than or equal to 18 and less than or equal to 65 years old.
- Weight greater than 110 pounds.
- Ability to sign the consent form.
- Willingness to comply with study procedures.
Key exclusion criteria (6 listed)
- Transfusion of any blood products within the past 90 days.
- Active bleeding.
- Clinically apparent and/or symptomatic anemia (pallor, orthostasis, etc).
- Self-reported history of HIV, Hepatitis B virus, or Hepatitis C virus infection.
- Severe chronic disease (e.g. end-stage renal failure, malignancy, etc).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jul 2017.
Related trials for Hemoglobin Mutations
RecruitingPhase 3
A Study to Investigate the Efficacy and Safety of Crizanlizumab (5 mg/kg) Compared With Placebo in Adolescent and Adult Sickle Cell Disease Patients Who Experience Frequent Vaso-Occlusive Crises (SPARKLE)
Sickle Cell Disease
Active, not recruitingPhase 3
Study of Two Doses of Crizanlizumab Versus Placebo in Adolescent and Adult Sickle Cell Disease Patients
Sickle Cell Disease (SCD)
RecruitingPhase 2
MT2021-08T Cell Receptor Alpha/Beta Depletion PBSC Transplantation for Heme Malignancies
Hematologic Malignancy, Acute Leukemia
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Hemoglobin Mutations and Erythrocyte Variants, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Jul 2017. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jul 2017.