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Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain
11:03

Conditional Genetic Transsynaptic Tracing in the Embryonic Mouse Brain

Published on: December 22, 2014

19.1K

Conditional genetic transsynaptic tracing in the embryonic mouse brain.

Devesh Kumar1, Ulrich Boehm2

  • 1Department of Pharmacology and Toxicology, University of Saarland School of Medicine; devesh.kumar@uks.eu.

Journal of Visualized Experiments : Jove
|December 31, 2014
PubMed
Summary
This summary is machine-generated.

We developed a novel genetic transsynaptic tracing method for mouse embryos, enabling study of neural circuit formation without invasive injections. This technique allows detailed analysis of brain development and neuronal communication.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Understanding brain-behavior relationships requires anatomical path tracing.
  • Current transsynaptic tracing methods are limited by stereotaxic tracer injection, hindering embryonic brain studies.

Purpose of the Study:

  • To develop a non-invasive, genetic transsynaptic tracing strategy for studying embryonic neural circuit formation.
  • To enable single-cell resolution analysis of neuronal communication during brain development.

Main Methods:

  • Generated two knock-in mouse strains for conditional expression of barley lectin (BL) and Tetanus Toxin fragment C (TTC).
  • Utilized Cre-mediated recombination for cell-specific, genetically encoded tracer production from the ROSA26 locus.
  • Applied the protocol to delineate neural circuitry in the developing female mouse reproductive axis.

Main Results:

  • Established a binary genetic strategy for conditional transsynaptic tracing in mouse embryos.
  • Demonstrated the suitability of the method for studying neural circuit formation without mechanical tracer injection.
  • Successfully delineated neural circuitry underlying reproductive axis maturation.

Conclusions:

  • The novel genetic tracing method overcomes limitations of traditional techniques for embryonic brain research.
  • This approach facilitates the analysis of genetically defined neuronal communication during development.
  • Provides a detailed protocol for transsynaptic tracing in mouse embryos, applicable to various developmental studies.