Related Experiment Video
Updated: Apr 15, 2026
09:25
Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM
Published on: May 8, 2020
11.5K
R-loop landscapes in the developing human brain are linked to neural differentiation and cell type-specific
Elizabeth A LaMarca1,2,3,4,5, Atsushi Saito6, Amara Plaza-Jennings1,2,5
1Graduate School of Biomedical Science, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
Translational Psychiatry
|April 13, 2026
Summary
R-loops, DNA/RNA structures, are abundant in the prenatal human brain. Their regulation impacts neural progenitor cell differentiation and gene expression, crucial for neurodevelopment.
Area of Science:
- Genomics
- Neuroscience
- Molecular Biology
Background:
- R-loops are three-stranded nucleic acid structures.
- They consist of a DNA/RNA hybrid and a displaced single DNA strand.
Purpose of the Study:
- To map R-loops in the human prenatal brain.
- To investigate the role of R-loops in neural progenitor cell differentiation and gene expression.
Main Methods:
- Genome-scale R-loop mapping in proliferative and differentiated zones of the human prenatal brain.
- Analysis of R-loop formation at gene promoters.
- RNase H1-mediated manipulation of R-loops in neural progenitors.
- Transcriptomic analysis.
- In vivo and in vitro assessment of neuronal connectivity.
Main Results:
- R-loops are abundant in the germinal matrix, a progenitor-rich region.
- R-loops preferentially form at promoters of genes upregulated during later differentiation stages, including neurodevelopmental risk genes.
- RNase H1-mediated reduction of R-loops promoted neuronal differentiation.
- Altered transcriptomics and impaired neuronal connectivity were observed following R-loop contraction.
Conclusions:
- R-loops play a critical role in regulating gene expression programs during neural progenitor cell differentiation.
- R-loops are important for fine-tuning differentiation-sensitive gene expression.
- R-loop dynamics are implicated in neurodevelopmental processes and neuronal connectivity.
