Transfusion requirements in autologous stem cell transplantation: a single-center-experience Sousse

INTRODUCTION  The transfusion support in peripheral blood stem cell transplantation is critical to the outcome of patients.  Aim of this study : evaluate the transfusion requirements in autologous stem cell transplantation.

METHODS  retrospective study  30 patients/ Lymphoma  Autologous peripheral blood stem cell transplantations 

PATHOLOGY

 Median age :30 years (range: 16-59).  sex ratio=2:  20 Males (67%)  10 Females (33%)

CONDITIONING REGIMEN : (BEAM)  Carmustine (BCNU):300mg/m² at the day(-7)  Etoposide: 200 mg/m² from day(-6) to day(-3)  Cytarabine:200mg/m² twice a day,from day (-6) to day(-3)  Melphalan:140mg/m² at the day (-2)  G-CSF (5ug/kg/day):  From day 5 to neutrophils recovery (>1000/mm3)

 Graft : 5,83 x10 ⁶ CD34/kg (range: 3- 14,95)  median duration of chemotherapy – induced aplasia : 10 days (range 7- 40).

TRANSFUSION INDICATIONS  Red Blood cell units: Hemoglobin level <8g/dl Poorly tolerated anemia  Platelet concentrates: Platelet count < bleeding

Total Blood products transfusion  39 packed red blood cell units  47 apheresis platelet concentrates  16 standard platelet transfusions: 99 SPC

RED BLOOD CELL TRANSFUSION  Median delay for red blood cell transfusion:  5 days after autograft (2 -9)

 15 patients (50%)  median number of transfused packed red blood cell units per patient : 2 (1-10).  median hemoglobin level before RBC transfusion : 6,8 g/dl (range 5,4 -8,7) RED BLOOD CELL TRANSFUSION

 No RBC transfusions : 50 % Median age : 30 years (range: ) Sex: 12 males, 3 females Pathology: 12 non Hodgkin lymphoma (2B) 3 Hodgkin lymphoma Graft : median of 5,79 x 10 ⁶ CD34/kg (range:3,6- 14,45) No difference in CD 34 + with transfused group RED BLOOD CELL TRANSFUSION

PLATELET CONCENTRATES TRANSFUSION 29 patients (96.6%) Delay for PC transfusion:  6 days after autograft (2-6)  Number of platelet transfusion sessions per patient : 2 (1-8).  Platelet count before platelet transfusion: 8000 ( )

 One patient wasn’t transfused at all. Age: 30 years Sex: M B- Cell lymphoma (CR1) Graft: 9,16x 10 ⁶ CD34+/kg Duration of aplasia: 10 days Transfusion free auto stem cell transplantation

DISCUSSION Transfusion requirements during autologous stem cell transplantation are not very important. In our patients : no influencing factors Littérature : young age number of CD34 infused +++

 CD  ≥ 5x 10 ⁶ /kg of CD34+ cells  shortens hematopoietic recovery  reduces the platelet transfusion requirements.

 thrombopenia at the initiation of autologous transplantation is associated with increased platelet transfusion requirements independent of the dose of CD34+ cells infused

 IL 11 : cytokine - stimulates hematopoietic stem cells, and MGC - increases the speed of platelet recovery -reduces platelet transfusions in autologous stem cell transplantation no clinical benefit !!! TPO, IL 6 regulate, stimulate thrombopoiesis IL 11 : interest ?? Cost???

 Erythropoietin prevents apoptosis of late erythroid progenitos and proerythroblasts No interest when level of endogenous Epo is high Early :No benefit of Epo : not enough erythroid precursos to respond !!!  >Day 28 : Epo is very efficient Cost ???

Immature (or reticulated) platelets (PLTs) contain more RNA than mature PLTs reflect the rate of thrombopoiesis. Immature PLTs are more active because of their higher nucleic acid content and higher expression of P-selectin and glycoprotein. efficacy of transfusion with rich IPF was higher than that of low IPF transfusion

CONCLUSION  Transfusion requirements in autologous stem cell transplantation are not important.  CD34+ cells ≥ 5x 10 ⁶ /kg No confirmed in our study Larger series +++  Interest of Transfusion-free autograft in our context ?

Thanks for attention