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Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
Published on: March 2, 2017
Lineage programming: navigating through transient regulatory states via binary decisions.
Vincent Bertrand1, Oliver Hobert
1Department of Biochemistry and Molecular Biophysics, Howard Hughes Medical Institute, Columbia University Medical Center, New York, NY 10032, USA. vb2157@columbia.edu
Current Opinion in Genetics & Development
|June 12, 2010
Summary
Cellular diversity arises from sequential binary decisions during development, a process well-studied in the nematode Caenorhabditis elegans. This lineage-based mechanism, involving transcription factor expression, is conserved across species.
Area of Science:
- Developmental Biology
- Genetics
- Cell Biology
Background:
- Lineage-based mechanisms are fundamental for generating cell type diversity in multicellular organisms.
- The nematode Caenorhabditis elegans is a key model organism due to its invariant cell lineage.
- Understanding cell fate specification is crucial for developmental biology.
Purpose of the Study:
- To elucidate the general model of cellular diversity generation in Caenorhabditis elegans.
- To investigate the role of transient regulatory states and transcription factors in cell fate specification.
- To explore the conservation of these mechanisms in other organisms.
Main Methods:
- Analysis of single-cell data.
- Investigation of cis-regulatory elements.
- Comparative analysis across different species.
Main Results:
- Cells progress through transient regulatory states marked by specific transcription factor expression.
- A reiterative binary decision mechanism drives transitions between states during cell division.
- Terminal division activates the terminal differentiation program, establishing cell identity.
Conclusions:
- A general model for generating cellular diversity involves sequential binary cell fate decisions.
- This lineage-based mechanism is conserved in the nervous system development of complex organisms like Drosophila and vertebrates.
- Transcription factor dynamics play a critical role in cell type specification.
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