TChIP-Seq: Cell-Type-Specific Epigenome Profiling

Mari Mito; Mitsutaka Kadota; Shinichi Nakagawa; Shintaro Iwasaki

doi:10.3791/58298

TChIP-Seq: Cell-Type-Specific Epigenome Profiling

JoVE Journal
Biology

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JoVE Journal Biology

TChIP-Seq: Cell-Type-Specific Epigenome Profiling

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07:28 min

January 23, 2019

DOI: 10.3791/58298-v

Mari Mito^1,2, Mitsutaka Kadota³, Shinichi Nakagawa^1,4, Shintaro Iwasaki^2,5

¹RNA Biology Laboratory,RIKEN, ²RNA Systems Biochemistry Laboratory,RIKEN Cluster for Pioneering Research, ³Laboratory for Phyloinformatics,RIKEN Center for Biosystems Dynamics Research, ⁴RNA Biology Laboratory, Faculty of Pharmaceutical Sciences,Hokkaido University, ⁵Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences,University of Tokyo

Overview

This article presents a detailed protocol for tandem chromatin immunoprecipitation sequencing (tChIP-Seq), highlighting its applicability in analyzing cell-type-specific histone modifications in the genome. By isolating chromatin from targeted cells, this method allows researchers to explore epigenetic regulation and enrich insights into neuron-specific histone modifications.

Key Study Components

Research Area

Epigenetics
Histone modification analysis
Cell-type specificity

Background

Importance of chromatin modifications in cellular function
Potential for understanding neuron development and function
Need for precise methods to study histone modifications

Methods Used

Tandem chromatin immunoprecipitation sequencing (tChIP-Seq)
Mouse neuron cells as the biological model
Affinity purification and electrophoresis for DNA quality verification

Main Results

Confirmed enrichment of histone modifications specific to neuron cells
Proven specificity of the immune purification with negative controls
Detailed observations of histone modifications along neuron genes

Conclusions

This study provides a valuable protocol for exploring histone modifications in a cell-type-specific manner.
It highlights the importance of tChIP-Seq in advancing research in epigenetics, particularly in understanding neuron biology.

Frequently Asked Questions

What is tChIP-Seq?

tChIP-Seq is a method used to analyze the genome-wide distribution of histone modifications specific to particular cell types.

Why is cell-type specificity important in epigenetics?

Cell-type specificity reveals how different cells regulate gene expression and functions based on their unique histone modification patterns.

What is the significance of histone modifications?

Histone modifications play a critical role in regulating gene expression, impacting cellular functions and development.

What are some safety precautions for using formaldehyde?

Precautions include wearing rubber gloves and protective eyewear, and ensuring proper ventilation in the workspace.

Can this method be applied to other cell types?

Yes, the tChIP-Seq technique can be adapted for other histone modifications and various cell types.

What is the role of glycine in the protocol?

Glycine is used to stop the fixation reaction during the sample preparation process.

How is DNA quality verified in the protocol?

DNA quality is checked at multiple stages using microfluidic electrophoresis after key steps like sonication and affinity purification.

We describe a step-by-step protocol for tandem chromatin immunoprecipitation sequencing (tChIP-Seq) that enables the analysis of cell-type-specific genome-wide histone modification.

This method can help answer key questions in the epigenetics field such as how much chromatic modifications are regulated in a cell type specific manner along with genomes. The main advantage of this technique is that we can isolate chromatin from the targeted cells and then follow typical gypsy downstream. So this method can provide insights into neuron specific trimincil, lysinc 4, opisoncilly.

It can also be applied to other histone modification, other cell types, and then other model organisms. Demonstrating the procedure will be Mari Mito, a technician from my laboratory. To begin, use fine spring scissors to dissect the tissue of interest into small pieces.

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