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Related Concept Videos

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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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing
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Full-Length Single-Cell RNA-Sequencing with FLASH-seq.

Vincent Hahaut1, Simone Picelli2

  • 1Institute of Molecular and Clinical Ophthalmology Basel (IOB), Basel, Switzerland.

Methods in Molecular Biology (Clifton, N.J.)
|December 10, 2022
PubMed
Summary
This summary is machine-generated.

FLASH-seq is a new full-length single-cell RNA sequencing method that detects more genes than previous techniques. Three variants offer customization for gene expression analysis and isoform reconstruction, improving transcriptome sensitivity.

Keywords:
FLASH-seqFLASH-seq low-amplificationFLASH-seq with UMIRNA-seqautomationfull-lengthhigh-throughputsingle cell

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Area of Science:

  • Molecular Biology
  • Genomics
  • Bioinformatics

Background:

  • Single-cell RNA sequencing (scRNA-seq) has advanced significantly since 2009, with droplet-based methods enabling analysis of thousands of cells.
  • Droplet-based scRNA-seq, while fast and cost-effective, primarily sequences the terminal portions of transcripts, limiting comprehensive transcriptome analysis.
  • Existing full-length protocols like Smart-seq2/3 offer deep transcriptome profiling but can be time-consuming or have other limitations.

Purpose of the Study:

  • To develop a novel, full-length single-cell RNA sequencing method (FLASH-seq) that enhances gene detection sensitivity and reduces hands-on time.
  • To present three variants of FLASH-seq (FS, FS-LA, FS-UMI) tailored for different research needs, including speed, simplicity, and molecular counting.
  • To provide a customizable and highly sensitive tool for detailed transcriptome analysis at the single-cell level.

Main Methods:

  • FLASH-seq (FS) builds upon Smart-seq2, offering a non-stranded, UMI-free method for straightforward gene expression measurement.
  • FLASH-seq low-amplification (FS-LA) is optimized for speed, generating sequencing-ready libraries in 4.5 hours without compromising performance.
  • FLASH-seq with UMIs (FS-UMI) incorporates unique molecular identifiers (UMIs) and a novel template-switching oligonucleotide (TSO) for accurate molecule counting and isoform reconstruction, minimizing artifacts.

Main Results:

  • FLASH-seq detects a significantly higher number of genes compared to previous full-length scRNA-seq methods.
  • The FS-LA variant achieves rapid library preparation, making it the fastest available method.
  • FS-UMI enables precise quantification of transcripts and reconstruction of isoforms, enhancing data accuracy.

Conclusions:

  • FLASH-seq represents a significant advancement in full-length single-cell RNA sequencing, offering improved sensitivity and gene detection.
  • The three variants provide flexibility for researchers, catering to needs for speed, simplicity, or high-accuracy molecular profiling.
  • FLASH-seq protocols hold great potential for advancing single-cell transcriptomics research through customizable and sensitive full-length transcriptome analysis.