Study of Immune Tolerance and Capacity for Wound Healing of Patients With Recessive Dystrophic Epidermolysis Bullosa (RDEB)

"* 5 ml of blood on dry tube: Verification of the absence of auto-antibodies to type VII collagen.~* 10 ml of blood sample on heparin: Verification of the absence of circulating reactive T-Lymphocytes clones to type VII collagen~* 5 ml of Blood samples on ethylenediaminetetraacetic acid (EDTA): HLA genotyping of patient selected on the clinical and molecular criteria."

"* A 5-mm punch skin biopsy in the groin region performed under local anaesthesic will be undertaken during visit 1.~* During the second visit, two additional 5-mm punch skin biopsies will be taken to assess stem cells proliferative capacity in 10 shortlisted patients"