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Updated: May 27, 2026
Live-cell Imaging of Platelet Degranulation and Secretion Under Flow
Published on: July 10, 2017
Visualization and manipulation of the platelet and megakaryocyte cytoskeleton
Jonathan N Thon1, Joseph E Italiano
1Hematology Division, Brigham and Women's Hospital, Boston, MA, USA.
Abstract:
Driven by the application of immunofluorescence (IF) microscopy and modern molecular biology approaches to cytoskeletal manipulation, the last 5 years have yielded considerable progress to our understanding of the molecular mechanisms governing megakaryocyte development and platelet biogenesis. Such studies have visualized endomitotic spindle dynamics, characterized the maturation of the -demarcation membrane system, delineated the mechanics of organelle transport and microtubule assembly in living megakaryocytes, described the process of platelet production in vivo, and revealed factors contributing to and the mechanisms driving proplatelet production and platelet release. Here, we describe methods to (1) culture megakaryocytes from murine fetal livers, (2) manipulate the tubulin and actin cytoskeleton of both platelets and cultured megakaryocytes, and (3) examine these by live-cell microscopy and fixed-cell immunofluorescence microscopy.
Insights
Recent advances in cytoskeletal research and immunofluorescence microscopy have significantly improved our understanding of megakaryocyte development and platelet production. New methods allow detailed examination of the cytoskeleton in megakaryocytes and platelets.
Area of Science:
- Cell Biology
- Hematology
- Molecular Biology
Background:
- Significant progress has been made in understanding megakaryocyte development and platelet biogenesis.
- Immunofluorescence (IF) microscopy and molecular biology techniques have been crucial in these advancements.
- Key processes like endomitotic spindle dynamics and demarcation membrane system maturation are better understood.
Purpose of the Study:
- To describe methods for culturing murine megakaryocytes.
- To outline techniques for manipulating the tubulin and actin cytoskeleton.
- To detail methods for examining these cytoskeletal changes using live-cell and fixed-cell microscopy.
Main Methods:
- Murine fetal liver megakaryocyte culture.
- Cytoskeletal manipulation using tubulin and actin.
- Live-cell and fixed-cell immunofluorescence microscopy.
Main Results:
- Established protocols for megakaryocyte culture and cytoskeletal manipulation.
- Visualized dynamic cytoskeletal processes in megakaryocytes and platelets.
- Provided a framework for further investigation into platelet production mechanisms.
Conclusions:
- The described methods facilitate detailed study of megakaryocyte and platelet biology.
- These techniques enhance the understanding of cytoskeletal roles in platelet biogenesis.
- Further research can build upon these methods to uncover new insights into hematopoiesis.
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