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Updated: Jul 9, 2025

Viral Tracing of Genetically Defined Neural Circuitry

Viral Tracing of Genetically Defined Neural Circuitry

Published on: October 17, 2012

Unveiling Hypothalamic Molecular Signatures via Retrograde Viral Tracing and Single-Cell Transcriptomics.

Muhammad Junaid¹, Han Kyoung Choe², Kunio Kondoh³

¹Department of Biochemistry & Molecular Biology, Ajou University School of Medicine, Suwon, 16499, Korea.

Scientific Data

|December 4, 2023

Summary

Researchers developed retrograde nuclear Connect-seq (nuConnect-seq) to map hypothalamic neurocircuits. This method analyzes single upstream neurons, revealing molecular identities crucial for understanding brain function and behavior regulation.

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Published on: June 17, 2019

Area of Science:

Neuroscience
Molecular Biology
Genomics

Background:

Hypothalamic neurocircuits regulate vital homeostatic and survival behaviors.
Limited understanding of the molecular identities of neurons in complex hypothalamic circuits.

Purpose of the Study:

To develop a novel method for mapping hypothalamic neurocircuits.
To generate a high-resolution transcriptomic dataset of hypothalamic cells.
To identify molecular identities of upstream neurons in hypothalamic circuits.

Main Methods:

Constructed a Cre recombinase-dependent pseudorabies virus (PRVs) for retrograde tracing.
Utilized retrograde nuclear Connect-seq (nuConnect-seq) for transcriptome analysis of single upstream neurons.
Generated a single nuclei RNA-seq (snRNA-seq) dataset from CRH-IRES-Cre (CRH-Cre) mice hypothalamus.
Validated the dataset using label transfer against a large integrated reference dataset.

Main Results:

Generated a snRNA-seq dataset of 1,533 hypothalamic cells.
Successfully mapped single upstream neurons using PRVs and nuConnect-seq.
Integrated diverse datasets for enhanced technical validity and cell type diversity.
Provided a validated transcriptomic resource for hypothalamic neurocircuit research.

Conclusions:

The nuConnect-seq approach offers a powerful tool for dissecting hypothalamic neurocircuits.
The validated dataset enhances understanding of hypothalamic cell type diversity and function.
Integrated transcriptomic data is essential for robust neurobiological research.