HSF1 controls transcriptional programs that establish thalamostriatal shaft synaptic architecture and preserve cognitive flexibility

The study uses HSF1 chromatin immunoprecipitation (ChIP) and other approaches to show that HSF1 directly controls genes involved in thalamostriatal (T-S) synapse formation, a circuit critical for cognitive flexibility. The authors had previously linked HSF1 to T-S density in Huntington's disease (HD), but this work clarifies the molecular mechanism. By demonstrating that HSF1-dependent transcriptional programs establish shaft synaptic architecture, the findings suggest a potential target for preserving cognitive function in neurodegenerative conditions. Further studies are needed to test whether boosting HSF1 activity can protect synapses and flexibility in HD models.