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RNA-seq03:21

RNA-seq

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RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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Combining long-term circuit mapping and network transcriptomics with SiR-N2c.

Hassal Lee1,2, Ernesto Ciabatti3, Ana González-Rueda1

  • 1Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.

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A new self-inactivating rabies virus (SiR-N2c) overcomes limitations in neural circuit mapping and single-cell genomics. This advance enables accurate genetic characterization of neural networks by reducing viral toxicity and immune response.

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Area of Science:

  • Circuit neuroscience
  • Neurobiology
  • Genomics

Background:

  • Neural network mapping and single-cell genomics are merging.
  • Monosynaptic rabies viruses are promising for combining circuit mapping with 'omics' approaches.
  • Limitations include viral cytotoxicity, immunogenicity, and altered gene expression.

Purpose of the Study:

  • To develop a rabies virus that minimizes cytotoxicity and immune response.
  • To enable accurate gene expression profiling in mapped neural circuits.
  • To facilitate single-cell genomic characterization of neural networks.

Main Methods:

  • Genomic modification of the CVS-N2c rabies strain to create a self-inactivating virus (SiR-N2c).
  • Application of SiR-N2c for neural circuit tracing.
  • Analysis of gene expression profiles in infected neurons and surrounding cells.

Main Results:

  • SiR-N2c demonstrated reduced cytotoxicity and minimal alteration of cellular transcriptional profiles.
  • The modified virus significantly dampened innate and acquired immune responses.
  • Enabled open-ended interventions on neural networks for genetic characterization.

Conclusions:

  • SiR-N2c effectively overcomes key limitations of previous rabies virus systems.
  • This tool facilitates the integration of circuit neuroscience and single-cell genomics.
  • Paves the way for advanced neural network analysis and genetic profiling.