Region-specific in situ hybridization-guided laser-capture microdissection on postmortem human brain tissue coupled...

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• Postmortem human brain tissue analysis is crucial for understanding neurological disorders.
• Preserving RNA integrity in postmortem samples is challenging but essential for accurate gene expression studies.

Purpose of the Study:

• To describe a detailed protocol for in situ hybridization-guided laser-capture microdissection (ISH-LCM) on postmortem human brain tissue.
• To enable precise isolation of specific brain nuclei enriched with messenger RNA (mRNA).
• To ensure high-quality gene profiling through optimized tissue handling and RNA preservation.

Main Methods:

• In situ hybridization (ISH) for target mRNA visualization.
• Laser-capture microdissection (LCM) for precise tissue isolation.
• Postmortem tissue handling protocols focused on RNA integrity.
• mRNA amplification and gene profiling using high-density microarray chips.
• Confirmation of gene expression using quantitative real-time polymerase chain reaction (qPCR).

Main Results:

• Successful isolation of specific brain nuclei from postmortem human brain tissue.
• Demonstrated enrichment of mRNA in microdissected samples.
• High-quality RNA integrity suitable for downstream molecular analyses.
• Reliable gene profiling data obtained through microarray and qPCR.

Conclusions:

• ISH-guided LCM is a powerful technique for targeted molecular analysis of postmortem human brain tissue.
• The described methods ensure the preservation of RNA integrity, critical for accurate gene expression studies.
• This approach facilitates detailed investigation into the molecular basis of neurological conditions using human brain samples.