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Er81 Transcription Factor Fine-Tunes Striatal Cholinergic Interneuron Activity and Drives Habit Formation
Noorya Yasmin Ahmed1, Yadollah Ranjbar-Slamloo1, Alice Shaam Al Abed1
1Eccles Institute of Neuroscience, John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory 2601, Australia.
Summary
The transcription factor Er81 controls cholinergic interneuron activity in the striatum, impacting neuronal function and habit formation. Its absence alters neuronal properties and sensorimotor responses in mice.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Cholinergic interneurons (CINs) are crucial for striatal function and behavior, but the molecular mechanisms regulating them are poorly understood.
- The transcription factor Etv1/Er81 is known to regulate neuronal development and activity, with expression in the developing striatum, but its specific role in CINs is unknown.
Purpose of the Study:
- To investigate the role of the transcription factor Er81 in cholinergic interneuron (CIN) function within the striatum.
- To determine how Er81 influences CIN molecular, morphological, and electrophysiological properties.
- To elucidate the impact of Er81-mediated CIN function on striatal activity and habit formation.
Main Methods:
- Utilized genetic ablation of Er81 specifically in CINs.
- Performed molecular, morphological, and electrophysiological analyses of CINs.
- Assessed CIN activity and sensorimotor responses in awake mice.
Main Results:
- Er81 is expressed in striatal CINs and its ablation significantly alters their molecular, morphological, and electrophysiological characteristics.
- Loss of Er81 amplifies intrinsic currents, affecting tonic and phasic CIN activity.
- Er81 is essential for normal CIN pauses and time-locked responses to sensorimotor inputs, influencing habit formation in adult male mice.
Conclusions:
- Er81 acts as a key cell-type-specific regulator of CIN function in the striatum.
- Er81-dependent control of CINs is critical for normal sensorimotor processing and habit formation.
- These findings offer insights into striatal function and potential mechanisms underlying behavioral inflexibility in disorders like addiction and autism.
