We believe that CEC, besides coming from cells shedding from patient vasculature, could partly belong to donor, originating from the cellular graft.
In consideration of the fact that the vascular endothelium has been shown to be a target of GvHD in early stage and that the count of CEC represent a marker of endothelial damage, we want to correlate the presence of donor CEC at engraftment with a putative protective function against GVHD manifestations. We will enroll patients affected by hematologic disorders undergoing allo-HSCT. At time of engraftment and at + 3 months after allo-HSCT, CEC identified and counted by means of the CellSearch system, will be recovered from the counting cartridge and further sorted at the single cell level. STR profile of each single CEC recovered will be performed in order to define host versus donor origin of each CEC analysed. Through the conduct of this study, we expect to upfront identify patients who will or will not manifest GvHD. This result will allow definitely different clinical approaches: stringent monitoring and early therapeutic intervention, before refractory disease's development, in the formers, while, sparing unnecessarily expensive testing or heavier treatment in the latters.
Study Type
OBSERVATIONAL
Enrollment
15
By means of preliminary bulk separation step with the CellSearch system, single CEC will be sorted
ASST Spedali Civili di Brescia
Brescia, Italy
Presence of D-CEC at time of engraftment in patients undergoing allo-HSCT
Single CEC will be isolated and STR profile determined
Time frame: Within 30 days from allo-HSCT
Correlate presence/absence of D-CEC with GVHD manifestations
D-CEC presence will be correlated with GVHD onset
Time frame: day +100 post allo-HSCT
Presence of donor CEC embedded in the endothelial layer of patients microvasculature at late timepoint after allo-HSCT
CISH analysis will be performed on tissue biopsies at 3 months post-transplant
Time frame: day +100 post allo-HSCT
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