Abstract: The present disclosure relates to a method of culturing quiescent hematopoietic stem cells. This method involves providing a culture medium and introducing, into the culture medium, quiescent hematopoietic stem cells to culture the stem cells and maintain quiescence of the stem cells. The culture medium comprises a vacuolar-H+ adenosine triphosphate ATPase (“v-ATPase”) inhibitor. Also disclosed are methods of treating a subject for a hematological disorder, methods of culturing leukemic stem cells, and methods of enhancing the hematopoietic reconstitution ability of a population of human hematopoietic stem cells.

Abstract: Recombinant Bcr-Abl polypeptides that form a stable &agr;-helical structure; nucleic acids encoding recombinant Bcr-Abl polypeptides; methods of identifying or designing inhibitors of Bcr-Abl oligomerization and methods of inhibiting Bcr-Abl oligomerization in cells and in individuals in need of inhibiting Bcr-Abl oligomerization, such as individuals who have developed or are at risk of developing chronic myelogenous leukemia or acute lymphoblastic leukemia.