Journal
CYTOTHERAPY
Volume 7, Issue 5, Pages 438-446Publisher
TAYLOR & FRANCIS AS
DOI: 10.1080/14653240500319135
Keywords
AMD3100; CXCR4; PBPC mobilization; SDF-1 alpha
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Stem cell transplantation, whether autologous or allogeneic, improves the outcome of patients with a number of hematologic malignancies or solid tumors. A relevant proportion of these patients are excluded from this treatment because sufficient numbers of hematopoietic stem cells cannot be obtained by standard cytokine-assisted mobilization. In this article we review the physiology of peripheral blood progenitor cell (PBPC) mobilization and discuss the role of adhesion molecules, such as integrins and selectins, chemokines and their ligands, such as SDF-1 alpha and CXCR4, and proteolytic enzymes. Based on this knowledge, several innovative pharmacologic approaches have been proposed to boost the PBPC harvest. Some of them (CTCE, C3a receptor agonist and Gro beta T) are still subject of pre-clinical development, others, such as chemokine receptor ligand AMD3100, have recently been introduced in clinical trials and already deliver promising results. It appears possible to harvest PBPC successfully in poor mobilizers and to cut down the number of collections required in the remaining PBPC donors.
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