Definition

An allogeneic cell preparation in which donor-derived hematopoietic stem cells (HSCs) are treated ex vivo with TBX-4000, a recombinant TAT-MYC fusion protein, with potential immunoreconstitutive activity. Upon administration, the TBX-4000-treated HSCs TBX-2400 may enhance the engraftment of the bone marrow upon allogeneic hematopoietic stem cells transplant (HSCT). The TBX-4000 recombinant fusion protein consists of the N-terminal 9 amino acid segment of the HIV TAT protein transduction domain (PTD) fused to the MYC protein. TBX-4000 TAT-MYC rapidly localizes to the nucleus and transiently provides signals to drive proliferation and survival of the HSCs.