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Erythroid stem cells in Rauscher viral erythroleukemia
Experimental Cell Biology
|January 1, 1983
Summary
Rauscher leukemia virus (RLV) infection in mice causes increased erythroid stem cell proliferation, particularly BFU-e, potentially enhancing erythropoiesis despite anemia. This suggests RLV infection directly impacts factors regulating red blood cell production.
Area of Science:
- Hematology
- Virology
- Oncology
Background:
- Murine oncornavirus infection, such as Rauscher leukemia virus (RLV), is characterized by splenomegaly and profound anemia.
- Erythroid stem cells, including colony-forming unit-erythroid (CFU-e) and burst-forming unit-erythroid (BFU-e), are crucial for red blood cell production.
Purpose of the Study:
- To investigate the expansion and proliferation of erythroid stem cells in mice infected with Rauscher leukemia virus (RLV).
- To determine the erythropoietin (Ep) dependence of RLV-infected erythroid stem cells.
Main Methods:
- Infection of mice with Rauscher leukemia virus (RLV).
- Analysis of erythroid stem cell (CFU-e and BFU-e) numbers in marrow and spleen.
- Assessment of erythropoietin (Ep) dependence for colony formation.
Main Results:
- Maximum erythroid stem cell colony numbers were observed 5 weeks post-viral inoculation.
- Splenic CFU-e and BFU-e expansion correlated with splenomegaly.
- RLV-derived CFU-e were Ep-dependent, while RLV-derived BFU-e proliferated at suboptimal Ep levels.
Conclusions:
- RLV infection enhances erythroid stem cell proliferation, particularly BFU-e.
- Factors associated with RLV infection may directly stimulate BFU-e, enhancing erythropoiesis.
- This enhanced erythropoiesis might be a compensatory response to RLV-induced anemia.