This study aims to constitute a collection of biological materials from in transplant patients and to provide biological materials from transplanted patients in order :
i) validate new theory on the cause of allograft loss, ii) develop innovative biomarker for rejection and other transplantation-related conditions (such as BK virus nephropathy, Post-transplant lymphoproliferative disorder ( PTLD) ...)
Male or Female patient ≥18 years old
Recipient of an organ transplant
Written informed consent
Non-affiliation to a social security system.
Subjects deprived of liberties
Pregnant or breastfeeding woman