FACS array profiling identifies Ecto-5' nucleotidase as a striatopallidal neuron-specific gene involved in...

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Background:

• The striatum contains striatopallidal (STP) and striatonigral (STN) neurons, crucial for motor control and learning.
• Understanding the distinct functions of STP and STN neurons and their specific genes is vital but challenging.

Purpose of the Study:

• To establish a reliable method for generating gene profiles of specific STP and STN neurons in adult mice.
• To identify novel genes uniquely expressed in STP and STN neurons.
• To investigate the functional role of identified genes, particularly in motor learning.

Main Methods:

• Utilized a transgenic Adora2A-Cre × Z/EG mouse model combined with retrograde labeling for neuron identification.
• Employed Fluorescence-Activated Cell Sorting (FACS) for purifying STP and STN neurons.
• Generated gene profiles and developed Cre-dependent lentiviral vector knock-down models for functional studies.
• Conducted behavioral analyses on knock-down and knock-out mouse models.

Main Results:

• Successfully generated specific gene profiles for STP and STN neurons.
• Identified ecto-5 -nucleotidase (NT5e) as a gene specifically expressed in STP neurons.
• Demonstrated that NT5e is the primary source of extracellular adenosine in the striatum.
• Confirmed the involvement of NT5e in motor learning through behavioral analysis of relevant mouse models.

Conclusions:

• The developed approach enables precise gene profiling of distinct striatal neuronal populations.
• NT5e, specifically expressed in STP neurons, plays a significant role in motor learning via extracellular adenosine production.