LSD1/KDM1A is essential for neural stem cell differentiation in mice

Area of Science:

• Neuroscience
• Developmental Biology
• Epigenetics

Background:

• Proper neural stem cell differentiation is essential for central nervous system development.
• The histone demethylase LSD1/KDM1A plays a role in regulating gene expression through epigenetic modifications.
• Understanding the function of LSD1 in neural stem cells is critical for insights into neurodevelopmental processes.

Approach:

• Investigated the function of LSD1/KDM1A in mouse neural stem cell differentiation.
• Utilized a conditional gene deletion strategy targeting LSD1 in nestin-positive neural stem cells.
• Analyzed developmental outcomes, motor neuron specification, and in vitro cultured motor neurons.

Key Points:

• Conditional deletion of LSD1 in neural stem cells resulted in perinatal lethality and severe motor deficits.
• Despite defects, motor neuron progenitors and initial populations were specified normally, with normal morphology in vitro.
• Motor neurons lacking LSD1 inappropriately maintained neural stem cell proteins.

Conclusions:

• LSD1 is required to deactivate the stem cell program, enabling normal neural stem cell differentiation.
• Unlike in other stem cell types, impaired LSD1 function in neural stem cells compromises neuronal function, not specification.
• These findings highlight a critical role for LSD1 in ensuring proper neuronal function post-differentiation.