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ABSTRACT: Barcoded rabies library

PROVIDER: PRJNA930497 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23310756_1.fastq.gz	Fastqsanger.gz
	SRR23310756_2.fastq.gz	Fastqsanger.gz
	SRR23310757_1.fastq.gz	Fastqsanger.gz
	SRR23310757_2.fastq.gz	Fastqsanger.gz
	SRR23310758_1.fastq.gz	Fastqsanger.gz

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Ascertaining cells' synaptic connections and RNA expression simultaneously with barcoded rabies virus libraries

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Project description:Sequencing of oligonucleotide barcodes holds promise as a high-throughput approach for reconstructing synaptic connectivity at scale. Rabies viruses can act as a vehicle for barcode transmission, thanks to their ability to spread between synaptically connected cells. However, applying barcoded rabies viruses to map synaptic connections in vivo has proved challenging. Here, we develop Barcoded Rabies In Situ Connectomics (BRISC) for high-throughput connectivity mapping in the mouse brain. To ensure that the majority of post-synaptic "starter" neurons are uniquely labeled with distinct barcode sequences, we first generated libraries of rabies viruses with sufficient diversity to label >1000 neurons uniquely. To minimize the probability of barcode transmission between starter neurons, we developed a strategy to tightly control their density. We then applied BRISC to map inputs of single neurons in the primary visual cortex (V1). Using in situ sequencing, we read out the expression of viral barcodes in rabies-infected neurons, while preserving spatial information. We then matched barcode sequences between starter and presynaptic neurons, mapping the inputs of 385 neurons and identifying 7,814 putative synaptic connections. The resulting connectivity matrix revealed layer- and cell-type-specific local connectivity rules and topographic organization of long-range inputs to V1. These results show that BRISC can simultaneously resolve the synaptic connectivity of hundreds of neurons while preserving spatial information, enabling reconstruction of neural circuits at an unprecedented scale.

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Project description:Rabies is an ancient infectious disease but still lacking efficient therapeutic approach despite of vaccine. In this study, we have identified a novel cytoplasmic lncRNA, namely rabies virus related lncRNA 1(RVRL1), whose expression in neuronal cells is up-regulated upon the infection of the causative agent of rabies, the neurotropic virus rabies virus (RABV). RVRL1 effectively inhibits RABV infection both in neuronal cells and in a mouse model. RVRL1 binds to EZH2 and disrupts the PRC2 complex, which is consistent with the inverse relationship between RVRL1 expression and the cellular H3K27me3 level. RVRL1 expression positively regulates the expression of PCP4L1 encoding a 10 kD peptide, which is shown to inhibit RABV replication. These findings highlight a novel mechanism for lncRNAs to upregulate the expression of antiviral genes, and define two potential anti-rabies reagents including an antiviral lncRNA and an antiviral peptide.

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