Notes on the Vocalizations of the Mexican Chickadee

INTRODUCTION: Donor hematopoietic stem cell (DHSC) infusions are increasingly being studied in transplant patients for tolerance induction. METHODS: To analyze the fate of infused DHSCs in patients, we developed an RESULTS: Flow cytometric analyses revealed loss of the CD34 marker and an increase in CD33 DISCUSSION: Extrapolation of these results into the clinical situation would suggest that DHSC infusions into transplant recipients may generate multiple subsets of donor "chimeric" cells and promote recipient Treg development that could regulate the anti-donor immune response in the periphery. These studies have also indicated that T cell maturation can occur