Neural expression of the transcription factor THAP1 during development in rat

Area of Science:

• Neuroscience
• Developmental Biology
• Genetics

Background:

• Loss-of-function mutations in THAP1 are associated with dystonia.
• THAP1 encodes a transcription factor crucial for cell cycle control.
• Dystonia is considered a neurodevelopmental circuit disorder, implicating THAP1 in nervous system development.

Purpose of the Study:

• To investigate the neurodevelopmental expression patterns of Thap1 transcript and THAP1 protein.
• To determine the role of THAP1 in the developing rat nervous system.

Main Methods:

• Analysis of Thap1 transcript and THAP1 protein expression in rat brain, spinal cord, and dorsal root ganglia (DRG) from postnatal day 1 (P1) to adulthood.
• Immunohistochemistry to detect THAP1 protein localization in specific neuronal populations.

Main Results:

• Thap1 transcript and THAP1-immunoreactivity (IR) were detected in various brain regions, spinal cord, and DRG.
• Thap1 expression was higher in the brain than in the spinal cord and DRG early in development, with sustained high levels in the cerebellum.
• THAP1 protein was localized in specific neurons, including Purkinje cells, cortical pyramidal neurons, thalamic relay neurons, striatal neurons, and substantia nigra dopaminergic neurons.

Conclusions:

• THAP1 exhibits prominent cytoplasmic and developmentally regulated expression in the nervous system.
• These findings suggest THAP1 may be involved in cell surface-nucleus signaling during terminal neural differentiation.
• THAP1's expression pattern supports its potential role in neurodevelopmental processes relevant to dystonia.