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[Quantitative determination of transplantable hemopoietic stem cells by limiting dilution method]
Biulleten' Eksperimental'Noi Biologii I Meditsiny
|October 1, 1990
Summary
This study quantifies hemopoiesis restoring units (HRU) in mouse bone marrow using transplantation. Different mouse strains showed varying HRU concentrations, impacting recipient survival rates post-transplantation.
Area of Science:
- Hematology
- Stem Cell Biology
- Transplantation Immunology
Background:
- Bone marrow transplantation is crucial for restoring hematopoiesis.
- Quantifying hemopoiesis restoring units (HRU) is essential for optimizing transplantation protocols.
- Mouse models are widely used to study bone marrow cellularity and function.
Purpose of the Study:
- To determine the concentration of hemopoiesis restoring units (HRU) in the bone marrow of different mouse strains.
- To evaluate the relationship between bone marrow cell dose, HRU, and recipient survival after lethal irradiation and transplantation.
Main Methods:
- Limiting dilution analysis was employed for HRU quantification.
- Bone marrow cells from CBF1 and BCT6F1 mice were transplanted into lethally irradiated recipient mice.
- Recipient survival was monitored for 4 weeks post-transplantation.
Main Results:
- CBF1 mice bone marrow contained 7 to 12.7 HRU per 10(6) cells.
- BCT6F1 mice bone marrow contained 19.2 to 50.6 HRU per 10(6) cells.
- Lower marrow doses (0.5-2.5 HRU/mouse) resulted in increased mortality over time, while higher doses (10^6-10^7 cells) showed stable survival.
Conclusions:
- Bone marrow cellularity and HRU concentration vary significantly between mouse strains.
- Adequate HRU dosage is critical for successful engraftment and long-term survival following bone marrow transplantation.
- The findings provide a basis for dose-optimization in bone marrow transplantation studies.