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Updated: Jun 7, 2026
Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
Published on: December 27, 2017
CFU-MK assay for acute thrombocytopenia
Dominique Parent-Massin1, Yann Sibiril
1UFR Sciences, Université de Bretagne Occidentale, Brest, France.
Abstract:
In this unit, protocols to culture human platelet progenitors (Colony Forming Unit-Megakaryocyte; CFU-M) with or without toxicants are described. Platelet progenitors are obtained from human umbilical cord blood. After separation of mononuclear cells, the cell suspension can be cryopreserved or plated immediately. Megakaryocytes are identified by immunocytochemistry. Test chemicals are added to the culture medium before cells are plated. Megakaryocytes are scored after 12 days of culture. IC(10), IC(50) and IC(90) can be calculated by comparison to control cultures. A predictive model is proposed to evaluate the hazard of thrombocytopenia induced by chemicals. When IC(50) and IC(90) are below C(max) in humans, the likelihood of thrombocytopenia is strong.
Insights
This study details culturing human platelet progenitors (CFU-M) to test chemical toxicity. A predictive model helps assess chemical-induced thrombocytopenia risk based on cell culture results.
Area of Science:
- Hematology and Toxicology
- Cell Biology and Drug Discovery
Background:
- Human umbilical cord blood serves as a source for platelet progenitors.
- Accurate methods are needed to evaluate the potential of chemicals to induce thrombocytopenia (low platelet count).
Purpose of the Study:
- To describe protocols for culturing human megakaryocytes (platelet progenitors) from umbilical cord blood.
- To establish a method for assessing the toxicity of chemicals on megakaryocyte development.
- To develop a predictive model for chemical-induced thrombocytopenia.
Main Methods:
- Isolation of mononuclear cells from human umbilical cord blood.
- Culture of cells to promote megakaryocyte development over 12 days.
- Identification of megakaryocytes using immunocytochemistry.
- Addition of test chemicals to the culture medium.
- Calculation of inhibitory concentrations (IC10, IC50, IC90) compared to control cultures.
Main Results:
- Protocols for culturing and assessing human megakaryocytes in the presence of toxicants are established.
- The method allows for the determination of chemical concentrations inhibiting megakaryocyte development.
- A predictive model is proposed based on IC50 and IC90 values relative to human Cmax.
Conclusions:
- The described cell culture system provides a reliable method for evaluating chemical toxicity on platelet progenitors.
- The predictive model suggests a strong likelihood of thrombocytopenia if IC50 and IC90 values are below human Cmax.
- This approach aids in predicting the risk of drug-induced thrombocytopenia during chemical safety assessments.
