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Related Experiment Video

Updated: Mar 6, 2026

Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
06:30

Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM

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Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM.

Hung-Chang Shen1, Tsai-Chi Hsu2, Pei-Chi Chung2

  • 1Institute of Cellular and Organismic Biology, Academia Sinica; Graduate Institute of Life Sciences, National Defense Medical Center.

Journal of Visualized Experiments : Jove
|March 14, 2017
PubMed
Summary
This summary is machine-generated.

Twin-spot MARCM (tsMARCM) enables precise neural lineage mapping in Drosophila by labeling twin cells with distinct colors. This advanced technique facilitates detailed studies of neuronal development and gene function.

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Area of Science:

  • Developmental Biology
  • Neuroscience
  • Genetics

Background:

  • Mosaic analysis with a repressible cell marker (MARCM) is a key technique in Drosophila for studying gene function and neuronal morphology.
  • MARCM relies on site-specific recombination to generate marked and unmarked daughter cells from dividing precursors.
  • Existing MARCM methods have limitations in fully utilizing information from both daughter cell lineages.

Purpose of the Study:

  • To introduce and describe the application of the twin-spot MARCM (tsMARCM) system in Drosophila.
  • To enable high-resolution neural lineage mapping by tracking twin cells derived from a single progenitor.
  • To facilitate comparative gene function studies by analyzing identical neurons across different experimental subjects.

Main Methods:

  • Utilizing the tsMARCM system, which employs site-specific recombination to generate twin cells labeled with two distinct colors.
  • Applying tsMARCM to mitotic precursor cells to create MARCM clones and their unmarked counterparts.
  • Analyzing pairs of tsMARCM clones to determine the birth-order and developmental relationships of neurons.

Main Results:

  • tsMARCM allows for the simultaneous labeling of twin hemi-lineages from a common progenitor.
  • The system provides high-resolution lineage mapping, revealing the precise birth-order of neurons.
  • Enables phenotypic analysis of genetically identical neurons in different animals, enhancing gene function studies.

Conclusions:

  • tsMARCM is a powerful extension of MARCM for detailed neural lineage mapping in Drosophila.
  • This technique significantly advances the study of neuronal development and gene function.
  • tsMARCM offers a robust platform for dissecting complex neural circuits and developmental processes.