Microfluidic low-input profiling reveals lncRNA roles in disease.

Area of Science:

• Genomics
• Epigenetics
• Molecular Biology

Background:

• Long noncoding RNAs (lncRNAs) are crucial regulators of gene expression with poorly understood roles in disease.
• Current methods for profiling lncRNA-chromatin interactions demand extensive cell input, limiting studies in specific tissues or cell types.

Purpose of the Study:

• To develop and validate a low-input microfluidic technology for genome-wide profiling of lncRNA-chromatin interactions.
• To enable cell-type-specific lncRNA analysis in challenging sample types, such as postmortem human brain tissue.

Main Methods:

• Development of microfluidic Chromatin Isolation by RNA Purification (muChIRP) technology.
• Validation using two lncRNAs (GOMAFU, TERC) in human/mouse cell lines and brain tissues.
• Profiling of neuronal nuclei from postmortem human brain tissue of schizophrenia patients and controls.

Main Results:

• muChIRP-seq successfully maps lncRNA-chromatin interactions from as few as 50,000 cells.
• Distinct roles for GOMAFU and TERC in schizophrenia pathogenesis were identified.
• Integrative analysis revealed coordination between lncRNA binding and epigenomic mechanisms in schizophrenia.

Conclusions:

• muChIRP-seq significantly reduces input material requirements for lncRNA interaction studies.
• This technology facilitates cell-type-specific lncRNA profiling in clinical tissue samples.
• The findings open new avenues for understanding lncRNA involvement in disease mechanisms, particularly schizophrenia.