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Isolation of Mouse Megakaryocyte Progenitors
10:30

Isolation of Mouse Megakaryocyte Progenitors

Published on: May 20, 2021

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A unique microenvironment in the developing liver supports the expansion of megakaryocyte progenitors

Nathalie Brouard1,2, Camille Jost1, Nadine Matthias2

  • 1Université de Strasbourg, INSERM, Etablissement Français du Sang-Alsace, Biologie et Pharmacologie des Plaquettes Sanguines Unité Mixte de Recherche-S 949, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France.

Blood Advances
|January 4, 2018
PubMed

Insights

Researchers discovered a novel stromal cell population in the fetal liver that supports megakaryocyte production. This finding offers new insights into megakaryopoiesis and the fetal liver

Area of Science:

  • Hematology
  • Developmental Biology
  • Stem Cell Biology

Background:

  • The fetal liver is a critical site for hematopoietic stem cell (HSC) expansion.
  • It is also a key organ for studying megakaryocyte progenitor differentiation.

Purpose of the Study:

  • To identify and characterize novel stromal cell populations in the fetal liver involved in megakaryopoiesis.
  • To investigate the role of these stromal cells in supporting megakaryocyte production from HSCs.

Main Methods:

  • Flow cytometry was used to identify a specific stromal cell population (CD45-TER119-CD31-CD51+VCAM-1+PDGFRα-) in mouse fetal liver.
  • Co-culture experiments were performed using this stromal population with mouse bone marrow HSCs and human HSC-myeloid progenitors.
  • Megakaryocyte differentiation and proplatelet formation were assessed in vitro.

Main Results:

  • A unique stromal cell population (V+P-) was identified in the fetal liver.
  • This V+P- population efficiently supported megakaryocyte production from both mouse and human progenitors with limited cytokines.
  • Co-cultured megakaryocytes were polyploid, expressed key markers (CD41/CD42c), and produced proplatelets, indicating functional maturity.

Conclusions:

  • The fetal liver harbors a distinct cellular microenvironment crucial for megakaryopoiesis.
  • The identified V+P- stromal cells play a significant role in supporting megakaryocyte development.
  • This cellular niche presents a platform for discovering novel regulators of megakaryopoiesis.

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