IL3 Has a Detrimental Effect on Hematopoietic Stem Cell Self-Renewal in Transplantation Settings
Overview
Chemistry
Molecular Biology
Authors
Affiliations
The ex vivo expansion and maintenance of long-term hematopoietic stem cells (LT-HSC) is crucial for stem cell-based gene therapy. A combination of stem cell factor (SCF), thrombopoietin (TPO), FLT3 ligand (FLT3) and interleukin 3 (IL3) cytokines has been commonly used in clinical settings for the expansion of CD34 from different sources, prior to transplantation. To assess the effect of IL3 on repopulating capacity of cultured CD34 cells, we employed the commonly used combination of STF, TPO and FILT3 with or without IL3. Expanded cells were transplanted into NSG mice, followed by secondary transplantation. Overall, this study shows that IL3 leads to lower human cell engraftment and repopulating capacity in NSG mice, suggesting a negative effect of IL3 on HSC self-renewal. We, therefore, recommend omitting IL3 from HSC-based gene therapy protocols.
Utilizing epigenetic regulators to improve HSC-based lentiviral gene therapy.
Tajer P, Karakaslar E, Cante-Barrett K, Naber B, Vloemans S, van Eggermond M Blood Adv. 2024; 8(18):4936-4947.
PMID: 38916861 PMC: 11421325. DOI: 10.1182/bloodadvances.2024013047.
Lin H, Takagi M, Kubara K, Yamazaki K, Michikawa F, Okumura T Stem Cell Res Ther. 2024; 15(1):106.
PMID: 38627844 PMC: 11021011. DOI: 10.1186/s13287-024-03723-2.
Fowler-Shorten D, Maynard R, Hampton K, Altera A, Markham M, Ehikioya M Haematologica. 2024; 109(5):1576-1581.
PMID: 38186347 PMC: 11063845. DOI: 10.3324/haematol.2023.283944.
The maintenance mechanism of hematopoietic stem cell dormancy: role for a subset of macrophages.
Chae C, Choi G, Kim Y, Cho M, Kwon Y, Kim H BMB Rep. 2023; 56(9):482-487.
PMID: 37574807 PMC: 10547972.
TGF Inhibitor A83-01 Enhances Murine HSPC Expansion for Gene Therapy.
Fleischauer J, Bastone A, Selich A, John-Neek P, Weisskoeppel L, Schaudien D Cells. 2023; 12(15).
PMID: 37566057 PMC: 10416825. DOI: 10.3390/cells12151978.