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2020 ◽  
Vol 2 (3) ◽  
pp. 113
Author(s):  
Iboroma Daopuye S. ◽  
Cookey Grace A. ◽  
Obunwo Charles C. ◽  
Amadi Kelechi G.

2008 ◽  
Vol 129 (20) ◽  
pp. 204504 ◽  
Author(s):  
Tzu-Yu Wang ◽  
Hsien-Tsung Li ◽  
Yu-Jane Sheng ◽  
Heng-Kwong Tsao

2003 ◽  
Vol 67 (1) ◽  
Author(s):  
Masako Yamada ◽  
H. Eugene Stanley ◽  
Francesco Sciortino

1989 ◽  
Vol 23 (1) ◽  
pp. 33-50 ◽  
Author(s):  
Daniel H. Manicourt ◽  
Eugene J-M Thonar ◽  
Julio C. Pita ◽  
David S. Howell

Blood ◽  
1983 ◽  
Vol 62 (4) ◽  
pp. 896-901 ◽  
Author(s):  
LE Thean ◽  
GS Hodgson ◽  
I Bertoncello ◽  
JM Radley

Properties of megakaryocyte progenitor cells in mouse bone marrow have been examined using an in vivo assay system. Perturbation with 5- fluorouracil (5-FU) and separation by unit gravity sedimentation was used to characterize the cells. Bone marrow was assayed for the presence of megakaryocyte colony-forming cells (MK CFU-S) by transplantation into lethally irradiated mice and examining spleen sections 10 days later. Donor mice were untreated or injected intravenously with 5-FU (150 mg/kg), 1 (FU-1) or 7 (FU-7) days beforehand. There was a lack of correlation between the numbers of MK CFU-S and cells giving rise to macroscopic spleen surface colonies (CFU- S10). The sedimentation profile of MK CFU-S in normal marrow was similar (modal velocity 4.16 +/- 0.05 mm/hr) to that of CFU-S10. In FU- 1 marrow, MK CFU-S exhibited a bimodal sedimentation profile, with peaks at 3.26 +/- 0.06 mm/hr and 4.53 +/- 0.07 mm/hr. The marrow content of CFU-S10 was reduced to 5% of normal, while MK CFU-S numbers were only reduced to 60%. In FU-7 marrow, the sedimentation profile of MK CFU-S (modal velocity 4.86 +/- 0.16 mm/hr) differed from that of CFU- S10 (5.5 +/- 0.16 mm/hr). It was concluded MK CFU-S and CFU-S10 are different entities. The MK colonies formed from FU-1 marrow contained on average 3.8-fold more cells than those formed from normal marrow. The enhanced megakaryocyte production may be accounted for on the basis of the generation-age model for cell proliferation. It is proposed that MK CFU-S are a heterogeneous population with regard to proliferation potential and that the FU-1 marrow contains cells that survive 5-FU and have a high proliferative potential. These cells may be equivalent among megakaryocytic progenitors to the high proliferative potential colony-forming cells of the granulocyte/macrophage series. They may be responsible for the enhanced megakaryocytopoiesis seen in the marrow of mice 7 days after the injection of 5-FU.


Blood ◽  
1983 ◽  
Vol 62 (4) ◽  
pp. 896-901 ◽  
Author(s):  
LE Thean ◽  
GS Hodgson ◽  
I Bertoncello ◽  
JM Radley

Abstract Properties of megakaryocyte progenitor cells in mouse bone marrow have been examined using an in vivo assay system. Perturbation with 5- fluorouracil (5-FU) and separation by unit gravity sedimentation was used to characterize the cells. Bone marrow was assayed for the presence of megakaryocyte colony-forming cells (MK CFU-S) by transplantation into lethally irradiated mice and examining spleen sections 10 days later. Donor mice were untreated or injected intravenously with 5-FU (150 mg/kg), 1 (FU-1) or 7 (FU-7) days beforehand. There was a lack of correlation between the numbers of MK CFU-S and cells giving rise to macroscopic spleen surface colonies (CFU- S10). The sedimentation profile of MK CFU-S in normal marrow was similar (modal velocity 4.16 +/- 0.05 mm/hr) to that of CFU-S10. In FU- 1 marrow, MK CFU-S exhibited a bimodal sedimentation profile, with peaks at 3.26 +/- 0.06 mm/hr and 4.53 +/- 0.07 mm/hr. The marrow content of CFU-S10 was reduced to 5% of normal, while MK CFU-S numbers were only reduced to 60%. In FU-7 marrow, the sedimentation profile of MK CFU-S (modal velocity 4.86 +/- 0.16 mm/hr) differed from that of CFU- S10 (5.5 +/- 0.16 mm/hr). It was concluded MK CFU-S and CFU-S10 are different entities. The MK colonies formed from FU-1 marrow contained on average 3.8-fold more cells than those formed from normal marrow. The enhanced megakaryocyte production may be accounted for on the basis of the generation-age model for cell proliferation. It is proposed that MK CFU-S are a heterogeneous population with regard to proliferation potential and that the FU-1 marrow contains cells that survive 5-FU and have a high proliferative potential. These cells may be equivalent among megakaryocytic progenitors to the high proliferative potential colony-forming cells of the granulocyte/macrophage series. They may be responsible for the enhanced megakaryocytopoiesis seen in the marrow of mice 7 days after the injection of 5-FU.


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