The Phosphatases STS1 and STS2 Regulate Hematopoietic Stem and Progenitor Cell Fitness.
Författare
Summary, in English
FLT3 and c-KIT are crucial regulators of hematopoietic stem and progenitor cells. We investigated the role of STS1 and STS2 on FLT3 and c-KIT phosphorylation, activity, and function in normal and stress-induced hematopoiesis. STS1/STS2-deficient mice show a profound expansion of multipotent progenitor and lymphoid primed multipotent progenitor cells with elevated colony-forming capacity. Although long-term hematopoietic stem cells are not increased in numbers, lack of STS1 and STS2 significantly promotes long-term repopulation activity, demonstrating a pivotal role of STS1/STS2 in regulating hematopoietic stem and progenitor cell fitness. Biochemical analysis identified STS1/STS2 as direct phosphatases of FLT3 and c-KIT. Loss of STS1/STS2 induces hyperphosphorylation of FLT3, enhances AKT signaling, and confers a strong proliferative advantage. Therefore, our study reveals that STS1 and STS2 may serve as novel pharmaceutical targets to improve hematopoietic recovery after bone marrow transplantation.
Avdelning/ar
- Avdelningen för translationell cancerforskning
- BioCARE: Biomarkers in Cancer Medicine improving Health Care, Education and Innovation
Publiceringsår
2015
Språk
Engelska
Sidor
633-646
Publikation/Tidskrift/Serie
Stem Cell Reports
Volym
5
Issue
4
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Cell Press
Ämne
- Hematology
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 2213-6711