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Identification of erythropoietin producing cells in fetal mouse liver cultures
Experimental Hematology
|September 1, 1977
Abstract:
Fetal mouse liver explants were cultured and the culture media shown to possess an erythropoietically active substance neutralizable by antiserum to sheep plasma erythropoietin, suggesting that the media contain erythropoietin. Immunofluorescent and carbon particle ingestion techniques suggest that the erythropoietin was elaborated by macrophages or Kupffer cells of the hepatic reticuloendothelial system.
Insights
Researchers found that fetal mouse liver cultures produce an erythropoietically active substance, likely erythropoietin. This substance appears to be made by macrophages or Kupffer cells within the liver.
Area of Science:
- Hematology
- Cell Biology
- Developmental Biology
Background:
- Erythropoiesis, the production of red blood cells, is crucial for oxygen transport.
- The liver is a significant site of erythropoiesis during fetal development.
- The precise cellular source of erythropoietin in the fetal liver is not fully elucidated.
Purpose of the Study:
- To investigate the presence and cellular origin of erythropoietically active substances in cultured fetal mouse liver explants.
- To determine if the liver tissue itself produces erythropoietin during development.
Main Methods:
- Culturing fetal mouse liver explants in vitro.
- Assessing the erythropoietic activity of the culture media using bioassays.
- Neutralizing the active substance with antiserum to sheep plasma erythropoietin.
- Utilizing immunofluorescence and carbon particle ingestion to identify the producing cells.
Main Results:
- Culture media from fetal mouse liver explants exhibited significant erythropoietic activity.
- This activity was neutralized by antiserum specific to erythropoietin.
- Immunofluorescence and carbon particle uptake indicated that macrophages or Kupffer cells within the hepatic reticuloendothelial system were the source of the erythropoietin.
Conclusions:
- Fetal mouse liver explants elaborate an erythropoietically active substance identified as erythropoietin.
- Macrophages and Kupffer cells of the hepatic reticuloendothelial system are the likely cellular sources of erythropoietin in the developing fetal liver.