Transfusion-Associated Microchimerism in Previously Injured Individuals Who Received a Blood Transfusion
| Status: | Terminated |
|---|---|
| Conditions: | Hospital |
| Therapuetic Areas: | Other |
| Healthy: | No |
| Age Range: | 8 - Any |
| Updated: | 7/13/2016 |
| Start Date: | August 2008 |
| End Date: | October 2011 |
Retrospective Study of the Prevalence of Transfusion-Associated Microchimerism Following Traumatic Injury, Burns, and Elective Orthopedic Procedures
Blood transfusions are frequently necessary in situations in which there is a large amount
of blood loss. In some individuals who receive a blood transfusion, white blood cells from
the donor's blood may remain in the body for years, a condition known as microchimerism.
This study will evaluate the occurrence of microchimerism among the following three groups
of individuals who previously received transfusions: 1) individuals with traumatic injuries;
2) individuals with burn injuries; and 3) individuals who underwent elective orthopedic
operations.
of blood loss. In some individuals who receive a blood transfusion, white blood cells from
the donor's blood may remain in the body for years, a condition known as microchimerism.
This study will evaluate the occurrence of microchimerism among the following three groups
of individuals who previously received transfusions: 1) individuals with traumatic injuries;
2) individuals with burn injuries; and 3) individuals who underwent elective orthopedic
operations.
Approximately 10% to 15% of injured patients who receive blood transfusions experience a
condition known as transfusion-associated microchimerism. This occurs when white blood
cells, or leukocytes, from the donor's blood persist in the recipient long after the
transfusion occurs. The genetically distinct donor cells can remain in the individual for
decades, and may account for as many as 4% of the white blood cells in the recipient's body.
This suggests that the donor cells are tolerated by the recipient's immune system. The
purpose of this study is to compare the incidence of microchimerism among individuals with
three different types of injuries: 1) traumatic injuries; 2) thermal, or burn, injuries; and
3) injuries resulting from elective orthopedic surgical procedures.
In this study, blood samples will be collected from individuals who were treated for
traumatic injury, thermal injury, or elective orthopedic surgical procedures at the
University of California at Davis Medical Center. Individuals who were treated from 2000 to
2003 and received a blood transfusion, as well as a control group of individuals who did not
receive a transfusion, will be approached to enroll in the study. Individuals who agree to
participate will have their blood analyzed for evidence of microchimerism. Information on
health status, injury characteristics, hospital care, blood transfusion details, and blood
donor characteristics will be collected from all participants.
condition known as transfusion-associated microchimerism. This occurs when white blood
cells, or leukocytes, from the donor's blood persist in the recipient long after the
transfusion occurs. The genetically distinct donor cells can remain in the individual for
decades, and may account for as many as 4% of the white blood cells in the recipient's body.
This suggests that the donor cells are tolerated by the recipient's immune system. The
purpose of this study is to compare the incidence of microchimerism among individuals with
three different types of injuries: 1) traumatic injuries; 2) thermal, or burn, injuries; and
3) injuries resulting from elective orthopedic surgical procedures.
In this study, blood samples will be collected from individuals who were treated for
traumatic injury, thermal injury, or elective orthopedic surgical procedures at the
University of California at Davis Medical Center. Individuals who were treated from 2000 to
2003 and received a blood transfusion, as well as a control group of individuals who did not
receive a transfusion, will be approached to enroll in the study. Individuals who agree to
participate will have their blood analyzed for evidence of microchimerism. Information on
health status, injury characteristics, hospital care, blood transfusion details, and blood
donor characteristics will be collected from all participants.
Inclusion Criteria:
- Hospitalized for traumatic injury, thermal injury, or an elective orthopedic surgical
procedure from 2000 to 2003 at the University of California at Davis Medical Center
- Received at least 1 unit of transfused red blood cells
Exclusion Criteria:
- Currently incarcerated
- Inadequate decision-making capacity of the participant and no available surrogate
decision-maker
- Prior bone marrow or solid organ transplantation
- Prior blood transfusion other than at the time of hospitalization
- Any history of an autoimmune disorder prior to hospitalization
We found this trial at
1
site
2315 Stockton Blvd.
Sacramento, California 95817
Sacramento, California 95817
(916) 734-2011
University of California, Davis Medical Center UC Davis Medical Center serves a 65,000-square-mile area that...
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