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Megakaryocyte Contribution to Bone Marrow Fibrosis: many Arrows in the Quiver

Alessandro Malara1,2, Vittorio Abbonante1,2, Maria Zingariello3

  • 1Department of Molecular Medicine, University of Pavia, Pavia, Italy.

Mediterranean Journal of Hematology and Infectious Diseases
|November 13, 2018
PubMed

Insights

In Primary Myelofibrosis (PMF), abnormal megakaryocytes drive fibrosis by releasing inflammatory factors. This review explores how these cells and their secretions contribute to bone marrow fibrosis progression.

Area of Science:

  • Hematology
  • Oncology
  • Pathology

Background:

  • Primary Myelofibrosis (PMF) is characterized by bone marrow fibrosis.
  • Megakaryocyte abnormalities are implicated in PMF pathogenesis.
  • The precise mechanisms driving fibrosis in PMF remain incompletely understood.

Purpose of the Study:

  • To review the critical role of megakaryocytes in the development of myelofibrosis.
  • To elucidate the contribution of megakaryocyte-derived factors to bone marrow fibrosis.

Main Methods:

  • Literature review of studies on megakaryocytes and myelofibrosis.
  • Analysis of research on soluble factors, enzymes, and extracellular matrices secreted by megakaryocytes.
  • Synthesis of current understanding of PMF pathogenesis.

Main Results:

  • Megakaryocyte dysplasia and hyperplasia are key drivers of inflammatory cytokine release in PMF.
  • These cytokines activate stromal cells, promoting bone marrow fibrosis.
  • Altered megakaryocyte-derived soluble factors, enzymes, and extracellular matrices contribute significantly to fibrosis.

Conclusions:

  • Megakaryocytes play a central role in the progression of bone marrow fibrosis in PMF.
  • Understanding megakaryocyte-driven mechanisms is crucial for developing targeted therapies for PMF.
Keywords:
Bone marrowFibrosisMegakaryocyteMyeloproliferative neoplasmsPlateletsTransforming growth factor-β

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