Published: October 3rd, 2018
We describe the use of hematopoietic stem cell transplantation (HSCT) to assess the malignant potential of genetically engineered hematopoietic cells. HSCT is useful for evaluating various malignant hematopoietic cells in vivo as well as generating a large cohort of mice with myelodysplastic syndromes (MDS) or leukemia to evaluate novel therapies.
Myelodysplastic syndromes (MDS) are a diverse group of hematopoietic stem cell disorders that are defined by ineffective hematopoiesis, peripheral blood cytopenias, dysplasia, and a propensity for transformation to acute leukemia. NUP98-HOXD13 (NHD13) transgenic mice recapitulate human MDS in terms of peripheral blood cytopenias, dysplasia, and transformation to acute leukemia. We previously demonstrated that MDS could be transferred from a genetically engineered mouse with MDS to wild-type recipients by transplanting MDS bone marrow nucleated cells (BMNC). To more clearly understand the MDS cell of origin, we have developed approaches to transplant specific, immunophenotypically defined hematopoietic subsets. In this article, we describe the process of isolating and transplanting specific populations of hematopoietic stem and progenitor cells. Following transplantation, we describe approaches to assess the efficiency of transplantation and persistence of the donor MDS cells.
Myelodysplastic syndromes (MDS) represent a diverse set of clonal blood disorders characterized by ineffective hematopoiesis, morphologic evidence of dysplasia, and a propensity for transformation to acute myeloid leukemia (AML)1,2,3,4. Ineffective hematopoiesis is recognized as a maturation arrest in bone marrow, and results in peripheral blood cytopenias despite a hypercellular bone marrow1,3. The incidence of MDS has been variously estimated as 2-12 cases per 100,000 persons annua....
The animal procedures described in this article were approved by the National Cancer Institute at Bethesda Animal Care and Use Committee, and conform to the policies contained within The Public Health Service Policy on Humane Care and Use of Laboratory Animals, The Animal Welfare Act, and the Guide for the Care and Use of Laboratory Animals.
1. Cell Preparation
We show representative figures for results of several experiments. Figure 1 shows a representative flow cytometry sorting experiment. During normal hematopoietic differentiation, as cells become committed to a specific hematopoietic lineage, they acquire lineage-defining cell surface markers and lose the potential for self-renewal. Therefore, in wild-type mice, stem cell self-renewal is confined to lineage-negative BMNC. In this experiment, we sorted BMNC fro.......
Although MDS are a clonal hematopoietic stem cell disorder, the MDS "stem", or initiating cells, have not yet been characterized. We previously demonstrated that MDS can be transplantable to WT mice using bone marrow from NHD13 mice by HSCT, characterized by macrocytic anemia, leukopenia, neutropenia, and morphologic evidence of dysplasia15. In addition, competitive repopulation assays identified a growth advantage of cells from the NHD13 MDS bone marrow. Taken together, these findings imp.......
|14 mL round bottom tube
|Hank's balanced salt solution
|3 mL Syringe
|1 mL Syringe
|Thermo Fisher Scientific
|2 lasers, 5 color detectors
|FACS sorting instrument
|5 lasers, 23 parameters, 6 population sorting simulteneously
|Thermo Fisher Scientific
|Blood collection tube
|Colony maintained at NIH
|5 mL round bottom tube
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