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Hemolytic transfusion reactions are a possible complication from red blood cell transfusions. Hemolysis refers to the lysis (rupture) of red blood cells, and the resulting leakage of their contents. Hemolytic reactions may be immune or non-immune mediated. Immune-mediated hemolytic reactions, such as DHTR, represent a type of alloimmunity.
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The severity of the transfusion reaction is depended upon amount of donor's antigen transfused, nature of the donor's antigens, the nature and the amount of recipient antibodies. [36] Delayed hemolytic reactions occur more than 24 hours after a transfusion. They usually occur within 28 days of a transfusion.
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Kidd antibodies are dangerous as they are capable of causing severe acute hemolytic transfusion reactions. They are unique in that they are capable of dropping to low or even undetectable levels after several months following an exposure. [5] Thus, on pre-transfusion testing, an anti-Jka or -Jkb may go undetected.
Among these, a potentially life-threatening reaction is known as a hemolytic transfusion reaction. This is an immune mediated reaction where recipient antibodies attack donor red blood cell antigen(s), causing hemolysis of donor cells. The reaction may occur during, immediately after, or up to 28 days later.
It is therefore common to select c-negative and E-negative blood for transfusion patients who have an anti-E and lack the c antigen (in general, a patient will not produce antibodies against their own antigens). Anti-c is a common cause of delayed hemolytic transfusion reactions. [15]
The antibodies are capable of causing hemolytic transfusion reactions and hemolytic disease of the fetus and newborn (if IgG isotype and therefore capable of crossing the placenta). [6] There is a relationship between anti-PP1P k and early spontaneous abortion (the placenta is rich in P k and GLOB antigens which are targeted by IgG isotype ...