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Updated: May 5, 2026
Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
Published on: December 27, 2017
Infusion of mature megakaryocytes into mice yields functional platelets
Rudy Fuentes1, Yuhuan Wang, Jessica Hirsch
1Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
Abstract:
Thrombopoiesis, the process by which circulating platelets arise from megakaryocytes, remains incompletely understood. Prior studies suggest that megakaryocytes shed platelets in the pulmonary vasculature. To better understand thrombopoiesis and to develop a potential platelet transfusion strategy that is not dependent upon donors, of which there remains a shortage, we examined whether megakaryocytes infused into mice shed platelets. Infused megakaryocytes led to clinically relevant increases in platelet numbers. The released platelets were normal in size, displayed appropriate surface markers, and had a near-normal circulating half-life. The functionality of the donor-derived platelets was also demonstrated in vivo. The infused megakaryocytes mostly localized to the pulmonary vasculature, where they appeared to shed platelets. These data suggest that it may be unnecessary to generate platelets from ex vivo grown megakaryocytes to achieve clinically relevant increases in platelet numbers.
Insights
Infusing megakaryocytes into mice successfully increased platelet counts. These donor-derived platelets were functional, suggesting a potential new strategy for platelet therapy without relying on donors.
Area of Science:
- Hematology
- Cell Biology
- Vascular Biology
Background:
- Thrombopoiesis, the production of platelets from megakaryocytes, is not fully understood.
- Platelet production may occur in the pulmonary vasculature.
- A shortage of donor platelets necessitates alternative transfusion strategies.
Purpose of the Study:
- To investigate whether infused megakaryocytes can produce functional platelets in vivo.
- To explore a potential donor-independent platelet transfusion method.
Main Methods:
- Megakaryocytes were infused into mice.
- Platelet production, size, surface markers, half-life, and in vivo functionality were assessed.
- Megakaryocyte localization and platelet shedding in the pulmonary vasculature were examined.
Main Results:
- Infused megakaryocytes significantly increased circulating platelet numbers.
- Donor-derived platelets exhibited normal size, surface markers, and near-normal half-life.
- In vivo functionality of the produced platelets was confirmed.
- Infused megakaryocytes primarily localized to the pulmonary vasculature and appeared to shed platelets.
Conclusions:
- Megakaryocyte infusion can lead to clinically relevant platelet increases.
- Platelet production from infused megakaryocytes in the pulmonary vasculature is feasible.
- Ex vivo platelet generation may not be necessary for achieving therapeutic platelet levels.
