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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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A Semiautomated ChIP-Seq Procedure for Large-scale Epigenetic Studies
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A Semiautomated ChIP-Seq Procedure for Large-scale Epigenetic Studies.

Justin Cayford1, Sara Herrera-da la Mata1, Benjamin Joachim Schmiedel1

  • 1Division of Vaccine Discovery, La Jolla Institute for Immunology.

Journal of Visualized Experiments : Jove
|September 1, 2020
PubMed
Summary

This study presents a semiautomated, microscaled H3K27ac ChIP-Seq method for low cell numbers. This innovation reduces labor and costs for large-scale epigenetic studies with clinical samples.

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Genomics

Background:

  • Chromatin immunoprecipitation followed by sequencing (ChIP-Seq) is crucial for profiling histone modifications like H3K27ac.
  • Traditional ChIP-Seq is labor-intensive, technically demanding, and requires substantial cell numbers (>100,000).

Purpose of the Study:

  • To develop a semiautomated, microscaled ChIP-Seq procedure for H3K27ac analysis.
  • To overcome limitations of manual ChIP-Seq, particularly for studies with limited cell input.

Main Methods:

  • A detailed semiautomated protocol for H3K27ac ChIP-Seq was established.
  • The method integrates cell fixation, chromatin shearing, immunoprecipitation, and library preparation for up to 48 samples.
  • The procedure is optimized for inputs below 100,000 cells.

Main Results:

  • The semiautonomous platform significantly reduces technical variability and improves signal-to-noise ratios.
  • Labor requirements and hands-on time are drastically reduced.
  • Reduced reaction volumes and reagent usage lower overall costs.

Conclusions:

  • This improved ChIP-Seq method enables reproducible epigenetic studies using limited clinical samples.
  • The approach is ideal for large-scale investigations requiring high throughput and reduced costs.
  • The technique enhances the accessibility and efficiency of profiling cis-regulatory DNA elements.