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Colony-promoting activity in mice kidneys with phenylhydrazine hemolytic anemia
T Bamba1, I Kashiwakura, M Murakami
1Laboratory of Radiopharmaceutical Sciences, Hokkaido College of Pharmacy, Otaru, Japan.
Abstract:
Aqueous anemic mice kidney extracts (MKE) were assessed colony-promoting activity (CPA) of hematopoietic progenitor cells in serum-free cultures stimulated by interleukin-3 and erythropoietin (Epo). Mice with hemolytic anemia followed by phenylhydorazine (PHZ) injection for 3 days showed a decrease in the hematocrit (25.4%) and an increase in serum Epo by 14-fold of the control on day 3 after the treatment. At 3 days, the total number of hematopoietic progenitor cells in the bone marrow of PHZ mice decreased by 67% of the control, while these cells in the spleen increased to 22-fold of the control on day 3 and 55-fold on day 6. A significant increase in CPA was observed in MKE prepared from PHZ mice kidneys. Additionally, bone marrow suppressive anemia induced by 5-fluorouracil resulted in enhanced CPA the same as for PHZ mice, but in contrast, anemia with suppression of Epo-production due to nephrotoxicity induced by cisplatin caused a decrease in CPA. These results suggest that CPA in MKE correlates with hematopoietic conditions, and may have a definite role in hematopoiesis through the function of the kidney.
Insights
Kidney extracts from anemic mice show colony-promoting activity (CPA) that supports hematopoietic progenitor cells. This activity correlates with hematopoietic conditions, suggesting a role for the kidney in blood cell formation.
Area of Science:
- Hematology
- Nephrology
- Cell Biology
Background:
- Anemia is characterized by reduced red blood cells and altered hematopoietic activity.
- Erythropoietin (Epo) is a key hormone regulating red blood cell production.
- Kidney function is closely linked to hematopoiesis.
Purpose of the Study:
- To investigate the colony-promoting activity (CPA) in mouse kidney extracts (MKE) from anemic mice.
- To determine the correlation between CPA and different types of anemia.
- To explore the potential role of the kidney in regulating hematopoiesis.
Main Methods:
- Induction of hemolytic anemia using phenylhydrazine (PHZ) in mice.
- Induction of bone marrow suppressive anemia using 5-fluorouracil.
- Induction of anemia with suppressed Epo-production using cisplatin.
- Assessment of CPA in MKE using serum-free cultures with interleukin-3 and Epo.
- Quantification of hematopoietic progenitor cells in bone marrow and spleen.
Main Results:
- PHZ-induced anemia led to decreased hematocrit, increased serum Epo, and altered progenitor cell distribution (decreased in bone marrow, increased in spleen).
- MKE from PHZ-induced anemic mice exhibited significantly enhanced CPA.
- Bone marrow suppressive anemia also resulted in enhanced CPA.
- Anemia due to cisplatin-induced nephrotoxicity, which suppressed Epo production, caused a decrease in CPA.
Conclusions:
- CPA in MKE is directly correlated with specific hematopoietic conditions.
- The kidney appears to play a role in hematopoiesis, potentially through factors influencing CPA.
- Kidney extracts may contain crucial components that modulate the activity of hematopoietic progenitor cells.