Protocol for antibody-based m6A sequencing of human postmortem brain tissues.

Area of Science:

• Molecular Biology
• Neuroscience
• Epigenetics

Background:

• N6-methyladenosine (m6A) is the most prevalent RNA modification in eukaryotes.
• m6A sequencing in human postmortem brain tissue is challenging due to sample limitations.
• Previous protocols require optimization for specific tissue types like postmortem brain.

Purpose of the Study:

• To present an optimized N6-methyladenosine (m6A) immunoprecipitation sequencing protocol.
• To adapt and refine existing m6A sequencing methods for human postmortem brain tissue.
• To ensure reliable capture and analysis of m6A modification sites in brain tissue.

Main Methods:

• Detailed protocol steps including RNA extraction, shearing, and immunoprecipitation.
• Optimization of RNA input (total RNA vs. poly(A) RNA).
• Evaluation of different commercial m6A antibodies and RNA/antibody ratios.

Main Results:

• The optimized protocol demonstrates reliable capture of m6A peaks from human postmortem brain tissue.
• Comparative data highlights optimal conditions for m6A profiling.
• Successful adaptation of m6A sequencing for challenging postmortem brain samples.

Conclusions:

• This optimized protocol provides a robust method for studying m6A modifications in human postmortem brain.
• The findings facilitate further research into the role of m6A in brain function and disease.
• The protocol enables accurate mapping of m6A peaks, advancing the field of RNA epigenetics in neuroscience.