Impact de la composition du greffon sur le devenir des patients après une allogreffe de cellules souches hématopoïétiques : corrélation entre proportion des lymphocytes T CD4+ du greffon exprimant le CCR7 et la survenue d’une GVH aiguë

In a previous prospective study on 62 patients who underwent an HLA-matched allogeneic stem cell transplantation, we have observed that proportion of donor-derived CCR7⁺/CD4⁺ T cells in the graft provided a predictive indicator of acute GVHD without interfering on chronic GVHD and relapse rate. Here we present our results on a confirmatory cohort of 137 consecutive patients. Indeed patients who received more than 76% of CCR7⁺/CD4⁺ T cells in the graft developed more often acute GVHD be it of low or high grade than those who did not. Determination of the CCR7⁺/CCR7^neg ratio of CD4⁺ T cells in the graft provides a predictive indicator of acute GVHD and could help to define strategies of partial selective T cell depleted transplantation.