GSK3β overexpression driven by GFAP promoter improves rotarod performance

Area of Science:

• Neuroscience
• Cell Biology

Background:

• Glycogen synthase kinase 3 beta (GSK3β) is implicated in various cellular processes.
• Its role in cerebellar function, particularly in Bergmann glial cells, remains incompletely understood.

Purpose of the Study:

• To investigate the consequences of in vivo GSK3β overexpression in the cerebellum.
• To evaluate the impact on motor coordination and glial cell markers.

Main Methods:

• Utilized transgenic mice with conditional GSK3β expression driven by the GFAP promoter.
• Assessed motor coordination using the accelerating rotarod test.
• Quantified GSK3β levels, Sox2+ cells, and glutamate transporters (GLT1, GLAST).

Main Results:

• GSK3β overexpression was confirmed in Bergmann cells.
• Transgenic mice exhibited enhanced performance on the rotarod test compared to wild-type.
• Doxycycline-induced transgene shutdown normalized rotarod performance.
• No increase in Sox2+ neural precursor cells was observed in the cerebellum.
• Elevated levels of cerebellar glutamate transporters GLT1 and GLAST were detected.

Conclusions:

• GSK3β plays a significant role in cerebellar function, particularly within Bergmann glial cells.
• GSK3β overexpression enhances motor coordination, suggesting a novel regulatory function.
• The study identifies GSK3β as a potential therapeutic target for cerebellar disorders.