Hypothesis:
In order to confirm that this differential effect of IL-2 muteins, already established in non-diseased controls, is also observed in patients with autoimmune diseases, inflammatory diseases or GVHD, a pilot in vitro study should be conducted on a small number of patient's blood samples (5 or 10 depending on the pathology).
Objective :
Conduct a multicentre pilot study to confirm the hypothesis that IL-2 muteins preferentially activate the STAT5 pathway in LTreg compared to LTconv in patients with GVHD, acquired bone marrow aplasia, systemic lupus erythematosus, multiple sclerosis, rheumatoid arthritis, autoimmune thyroiditis, vitiligo, alopecia or atopic dermatitis
Method:
At the inclusion, patients will have a blood sample collected for in vitro research purposes. Their clinical data will also be collected.
Conclusion This trial should provide in vitro proof-of-principle of the efficacy of IL-2 muteins on LTreg and could eventually lead to a therapeutic trial