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Related Experiment Videos

In vitro morphogenesis of amphibian erythroblasts.

L F Huang1, L Levinhar, M Ginsburg

  • 1Department of Biological Sciences, Hunter College, New York, New York 10021, USA.

Cell Biology International
|December 26, 2001
PubMed
Summary

Pointed amphibian erythroblasts are normal intermediate stages in red blood cell development. This study observed their morphogenesis, supporting a biogenetic program involving microtubule organization during differentiation.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Hematology

Background:

  • Non-mammalian vertebrate erythrocytes possess marginal bands (MBs) of microtubules crucial for their shape.
  • The role of pointed erythroblasts and MBs in terminal differentiation has been debated, lacking direct evidence.

Purpose of the Study:

  • To investigate the morphogenesis of individual post-cytokinetic amphibian erythroblasts in culture.
  • To provide direct evidence for the role of pointed erythroblasts in red blood cell differentiation.

Main Methods:

  • Live imaging of individual post-cytokinetic amphibian erythroblasts in culture.
  • Observation of cellular morphology changes over 1-2 hours.

Main Results:

  • Observed a sequential development of pointed morphology in erythroblasts: singly-pointed, doubly-pointed, and a second singly-pointed stage.

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  • Demonstrated that these pointed stages precede the final flattened discoid erythrocyte shape.
  • Noted that microtubule organization by centrosomes occurs at the pointed ends during differentiation.

    • Conclusions:

    • Pointed erythroblasts are normal, transient intermediates in amphibian red blood cell development.
    • Supports a biogenetic program where centrosomes organize MBs during erythroblast differentiation.
    • Provides direct evidence for the dynamic morphogenesis of nucleated erythrocytes.