Our body produces millions of new blood cells each second. All of these blood cells derive from hematopoietic stem cells (HSCs). For proper functioning, HSC requires the specialized microenvironment – the niche. However, during aging the blood forming potential of this dynamic system declines. Additionally, HSCs accumulate mutations what may lead to leukemia.

     We study how HSCs contribute to blood production during aging and their role in hematopoietic malignancies. Our research focuses on HSCs' heterogeneity and mechanisms that regulate their aging. We trace the roots of leukemia within the pool of human HSCs. Finally, we want to find the cellular and molecular mechanism that governs the specific HSC-niche interactions.

     To answer these question we develop new mice models and cooperate with the leaders in the field.



Group Leader

Krzysztof Szade 

PhD Students

Izabella Skulimowska
Monika Żukowska

Research Assistant

Justyna Sośniak 

Undergrad Students

Monika Gońka

Jan Morys

Sylwester Mosiołek 

  • Role of Neogenin-1/Netrin-1 axis
    in aging of hematopoietic stem cells

  • Contribution of pre-leukemic hematopoietic stem cells
    to acute lymphoid and myeloid leukemias


  • Heterogeneity and function
    of bone-marrow endothelial cells


  • Finding the determinants of human hematopoietic and leukemic stem cells niche.



  • in cooperation with Irv Weissman laboratory, we demonstrated that Neogenin-1 marks the myeloid-biased fraction of strictly defined Hoxb5+ HSC in mice   ​

  • we showed that lack of extrinsic
    heme-oxygenase-1 triggers premature exhaustion of hematopoietic stem cells in mice


  •  we developed new spheroid-plug model to study tumor angiogenesis

  • multiparameter flow cytometry
    and cell sorting

  • single cell functional analysis


  • transgenic and humanized mice models


  • low input RNA-seq

  • Czarny Instagram Ikona

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