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[Hematopoietic microenvironment: cellular and extracellular matrix elements].

J J Minguell1, M Fernández, M Tetas

  • 1Departamento de Ciencias Básicas, Facultad de Medicina, Universidad de Chile, Santiago.

Archivos De Biologia Y Medicina Experimentales
|June 1, 1988
PubMed
Summary

Fibroblast-like stromal cells in acute lymphoblastic leukemia (ALL) bone marrow show impaired growth and extracellular matrix (EM) production compared to normal marrow. This defect may hinder the development of a supportive microenvironment for hemopoiesis.

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Area of Science:

  • Hematology and Oncology
  • Cell Biology
  • Biochemistry

Context:

  • The bone marrow microenvironment, comprising cellular stroma and extracellular matrix (EM), is crucial for hemopoietic progenitor cell proliferation and differentiation.
  • Acute lymphoblastic leukemia (ALL) is characterized by malignant lymphocytes, but its impact on the bone marrow stromal microenvironment is not fully understood.

Purpose:

  • To investigate the cellular characteristics and extracellular matrix (EM) production of fibroblast-like stromal cells from normal and ALL bone marrow.
  • To compare the growth characteristics and synthesis of key EM components (collagen, fibronectin, glycosaminoglycans [GAGs]) between normal and ALL-derived fibroblasts.

Summary:

  • Fibroblast-like stromal cells were isolated from normal and ALL bone marrow for comparative in vitro studies.

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  • ALL-derived fibroblasts exhibited impaired growth characteristics and reduced synthesis of collagen, fibronectin, and GAGs compared to normal fibroblasts.
  • These findings indicate a defect in extracellular matrix (EM) biomolecule production by stromal cells in ALL.

    • Impact:

    • The impaired production of extracellular matrix (EM) biomolecules by damaged stromal cells in ALL may contribute to a defective bone marrow microenvironment.
    • This defective microenvironment could negatively impact hemopoiesis, potentially exacerbating the disease's effects.
    • Understanding these stromal defects provides insights into the pathobiology of ALL and potential therapeutic targets.