Reduced hematopoietic stem cells frequency predicts outcome in acute myeloid leukemia

• Verfasst von: Wang, Wenwen [VerfasserIn]
• Verfasst von: Stiehl, Thomas [VerfasserIn]
• Verfasst von: Raffel, Simon [VerfasserIn]
• Verfasst von: Hoang, Thanh Van [VerfasserIn]
• Verfasst von: Hoffmann, Isabel [VerfasserIn]
• Verfasst von: Poisa-Beiro, Laura [VerfasserIn]
• Verfasst von: Saeed, Borhan R. [VerfasserIn]
• Verfasst von: Manta, Linda [VerfasserIn]
• Verfasst von: Eckstein, Volker [VerfasserIn]
• Verfasst von: Bochtler, Tilmann [VerfasserIn]
• Verfasst von: Wuchter, Patrick [VerfasserIn]
• Verfasst von: Jauch, Anna [VerfasserIn]
• Verfasst von: Trumpp, Andreas [VerfasserIn]
• Verfasst von: Marciniak-Czochra, Anna [VerfasserIn]
• Verfasst von: Ho, Anthony Dick [VerfasserIn]
• Verfasst von: Lutz, Christoph [VerfasserIn]
• Titel: Reduced hematopoietic stem cells frequency predicts outcome in acute myeloid leukemia
• Verf.angabe: Wenwen Wang, Thomas Stiehl, Simon Raffel, Van T. Hoang, Isabel Hoffmann, Laura Poisa-Beiro, Borhan R. Saeed, Rachel Blume, Linda Manta, Volker Eckstein, Tilmann Bochtler, Patrick Wuchter, Marieke Essers, Anna Jauch, Andreas Trumpp, Anna Marciniak-Czochra, Anthony D. Ho, Christoph Lutz
• E-Jahr: 2017
• Jahr: May 2017
• Umfang: 11 S.
• Fussnoten: Gesehen am 21.08.2017
• Titel Quelle: Enthalten in: Haematologica
• Ort Quelle: Pavia : Ferrata Storti Foundation, 2014
• Jahr Quelle: 2017
• Band/Heft Quelle: 102(2017), 9, Seite 1567-1577
• ISSN Quelle: 1592-8721
• DOI: doi:10.3324/haematol.2016.163584
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 156258376X

Abstract

In patients with acute myeloid leukemia and low percentages of aldehyde-dehydrogenase-positive cells, non-leukemic hematopoietic stem cells can be separated from leukemic cells. By relating hematopoietic stem cell frequencies to outcome we detected poor overall- and disease-free survival of patients with low hematopoietic stem cell frequencies. Serial analysis of matched diagnostic and follow-up samples further demonstrated that hematopoietic stem cells increased after chemotherapy in patients that achieved durable remissions. However, in cases that eventually relapsed, hematopoietic stem cell numbers decreased dramatically at the time of molecular relapse demonstrating that hematopoietic stem cell levels represent an indirect marker for minimal residual disease, which heralds leukemic relapse. Upon transplantation in immune-deficient mice cases with low percentages of hematopoietic stem cells of our cohort gave rise to leukemic or no engraftment, whereas cases with normal hematopoietic stem cell levels mostly resulted in multi-lineage engraftment. Based on our experimental data, we propose that leukemic stem cells display an increased niche affinity in cases with low percentages of hematopoietic stem cells. To validate this hypothesis, we developed new mathematical models describing dynamics of healthy and leukemic cells under different regulatory scenarios. These models suggest that the mechanism leading to decreases in hematopoietic stem cell frequencies before leukemic relapse must be based on expansion of leukemic stem cells with high niche affinity and the ability to dislodge hematopoietic stem cells. Thus, our data suggest that decreasing numbers of hematopoietic stem cells indicate leukemic stem cell persistence and the emergence of leukemic relapse.