Abstract

Abstract 4325

Objective

Retrospective analysis the therapeutic and side effect of the rabbit antithymocyte (ATG) versus swine ALG within the preparative regimen of allogeneic hematopoietic transplantation (allo-HSCT) for graft versus host disease (GVHD) prophylaxis.

Methods

Totally 102 patients who had admitted to our hospital and been treated by allo-HSCT with the preparative regimen including ATG/ALG were followed up from June 2002 to June 2008. They were divided into ATG group and ALG group. The allergic reaction, effect of GVHD prophylaxis, transplantation related mortality (TRM), disease free survival (DFS) and relapse rate (RR) of these groups were retrospectively analyzed. Cumulative rate were analyzed by the Kaplan-Meier method and the factors associated with the III?‘‡W AGVHD were analyzed with the COX regression model.

Results

ALG group had more allergic reaction than ATG, but ATG group had more bacteremia and cytomegalovirus (CMV) antigenaemia. The haematopoiesis reconstitution was comparable in two groups. The III?‘‡W AGVHD, two-year TRM,DFS and RR were (40% vs 21%,p=0.028),(54% vs 29%,p=0.039),(41% vs 53%,p=0.174),(10% vs 24%,p=0.306),respectively in ATG/ALG groups. In multivariate analysis,10mg/kg ATG as a protective variable to III?‘‡W AGVHD occurrence(RR=0.53 ;95%CI, 0.38?‘0.71),The CD3+ cell counts of administration was associated with an increased risk for III?‘‡W GVHD(RR=4.43 ;95%CI, 3.87?‘4.95).

Conclusion

10mg/kg ATG significantly decreased the risks for III?‘‡W AGVHD and extensive chronic GVHD(ecGVHD); The lethal infections became the most important cause of death in the ATG group, but the increased risk for infection did not neutralize the reduction of TRM induced by the decrease of severe GVHD.

Disclosures:

No relevant conflicts of interest to declare.

Author notes

*

Asterisk with author names denotes non-ASH members.