The field of hematopoietic stem cell transplantation is rapidly
evolving. Realization that hematopoietic stem cells give rise to
the immune compartment has resulted in clinical trials of
hematopoietic stem cell transplantation for patients with
autoimmune diseases. Allogeneic hematopoietic transplants are a
form of adoptive immunotherapy resulting in beneficial graft versus
tumor effects. Large numbers of hematopoietic cells can be
collected with ease. Therefore, a renewable source of cells for ex
vivo genetic manipulations is readily available. Multiple trials
combining hematopoietic transplants and gene therapy are in
progress. One such application is the infusion of allogeneic
lymphocytes containing a suicide gene to abort graft versus host
disease. Hematopoietic stem cell transplantation is in reality the
clinical and practical application of cellular therapy.
Hematopoietic transplant physicians are by design or by practical
application evolving into cell and gene therapy specialists. The
excitement and enthusiasm in hematopoietic transplantation is that
it offers a door to the future. A future not of drugs or titrating
poisonous chemotherapy but rather of cellular and gene therapy. 1
ALLOGENEIC PERIPHERAL BLOOD STEM CELL TRANSPLANTATION FOR
HEMATOLOGIC DISEASES Martin Korbling University o/Texas MD.
Anderson Cancer Center, Houston, Texas 77030 INTRODUCTION
Circulating hematopoietic stem cells have emerged as an alternative
to bone marrow (BM) stem cells for allografting. For many years the
reconstitutive potential of circulating stem cells was questioned;
peripheral blood stem cells (PBSC) were even characterized a waste
product (1).
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