BACKGROUND: Red blood cell (RBC) transfusion remains an essential part of the management of patients with sickle cell disease (SCD). Alloimmunization is a major complication of transfusions. Extended RBC typing is advocated as a means to reduce alloimmunization in SCD. Our goal was to assess alloimmunization among individuals with SCD at our center since implementing extended RBC typing. MATERIALS AND METHODS: We reviewed electronic medical records of all patients with SCD (N = 641) in our comprehensive SCD Program to determine transfusion histories. Cross-referencing with our blood bank database, we extracted data such as antibodies identified, detection date and genotyping in specific cases. Transfusion sources were determined for those with C, E, and Kell antibodies. RESULTS: Of 180 patients transfused from 2002 to 2011, 26 developed at least one new antibody. The majority of alloimmunized patients (14/26) received episodic transfusions only. The most common antibodies formed were against C and E antigens. Of the 16 patients who developed C, E, Kell antibodies, nine had one or more documented transfusions at an outside hospital. Five patients had Rh variants undetectable on routine phenotyping including two novel e alleles related to ceAR and ce(S)(733G). CONCLUSION: Despite extended RBC typing, alloimmunization may still occur due to RBC variants that are not detected on routine screening and transfusions at institutions where extended RBC typing is not done. Extended RBC typing should be the standard of care for patients with SCD. Prospective genotyping may reduce allosensitization to rare variants not detected on routine screening.
BACKGROUND: Red blood cell (RBC) transfusion remains an essential part of the management of patients with sickle cell disease (SCD). Alloimmunization is a major complication of transfusions. Extended RBC typing is advocated as a means to reduce alloimmunization in SCD. Our goal was to assess alloimmunization among individuals with SCD at our center since implementing extended RBC typing. MATERIALS AND METHODS: We reviewed electronic medical records of all patients with SCD (N = 641) in our comprehensive SCD Program to determine transfusion histories. Cross-referencing with our blood bank database, we extracted data such as antibodies identified, detection date and genotyping in specific cases. Transfusion sources were determined for those with C, E, and Kell antibodies. RESULTS: Of 180 patients transfused from 2002 to 2011, 26 developed at least one new antibody. The majority of alloimmunized patients (14/26) received episodic transfusions only. The most common antibodies formed were against C and E antigens. Of the 16 patients who developed C, E, Kell antibodies, nine had one or more documented transfusions at an outside hospital. Five patients had Rh variants undetectable on routine phenotyping including two novel e alleles related to ceAR and ce(S)(733G). CONCLUSION: Despite extended RBC typing, alloimmunization may still occur due to RBC variants that are not detected on routine screening and transfusions at institutions where extended RBC typing is not done. Extended RBC typing should be the standard of care for patients with SCD. Prospective genotyping may reduce allosensitization to rare variants not detected on routine screening.
Authors: Lesedi M Williams; Zhihua Qi; Ken Batai; Stanley Hooker; Nancy J Hall; Roberto F Machado; Alice Chen; Sally Campbell-Lee; Yongtao Guan; Rick Kittles; Neil A Hanchard Journal: Blood Adv Date: 2018-12-26
Authors: Rachael P Jackman; Xutao Deng; Douglas Bolgiano; Garth H Utter; Cathy Schechterly; Mila Lebedeva; Eva Operskalski; Naomi L Luban; Harvey Alter; Michael P Busch; Sherrill J Slichter; Philip J Norris Journal: Transfusion Date: 2013-06-30 Impact factor: 3.157
Authors: Carla L Dinardo; Shannon Kelly; Marcia R Dezan; Ingrid H Ribeiro; Shirley L Castilho; Luciana C Schimidt; Maria do C Valgueiro; Liliana R Preiss; Brian Custer; Ester C Sabino; Connie M Westhoff Journal: Transfusion Date: 2019-08-13 Impact factor: 3.157
Authors: Marilyn J Telen; Araba Afenyi-Annan; Melanie E Garrett; Martha R Combs; Eugene P Orringer; Allison E Ashley-Koch Journal: Transfusion Date: 2014-12-01 Impact factor: 3.157
Authors: Tina S Ipe; Jennifer J Wilkes; Helge D Hartung; Connie M Westhoff; Stella T Chou; David F Friedman Journal: J Pediatr Hematol Oncol Date: 2015-03 Impact factor: 1.289