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Transcription factor Sp9 is a negative regulator of D1-type MSN development.

Cell death discovery (2022-07-01)
Zhenmeiyu Li, Zicong Shang, Mengge Sun, Xin Jiang, Yu Tian, Lin Yang, Ziwu Wang, Zihao Su, Guoping Liu, Xiaosu Li, Yan You, Zhengang Yang, Zhejun Xu, Zhuangzhi Zhang
ANOTACE

The striatum is the main input structure of the basal ganglia, receiving information from the cortex and the thalamus and consisting of D1- and D2- medium spiny neurons (MSNs). D1-MSNs and D2-MSNs are essential for motor control and cognitive behaviors and have implications in Parkinson's Disease. In the present study, we demonstrated that Sp9-positive progenitors produced both D1-MSNs and D2-MSNs and that Sp9 expression was rapidly downregulated in postmitotic D1-MSNs. Furthermore, we found that sustained Sp9 expression in lateral ganglionic eminence (LGE) progenitor cells and their descendants led to promoting D2-MSN identity and repressing D1-MSN identity during striatal development. As a result, sustained Sp9 expression resulted in an imbalance between D1-MSNs and D2-MSNs in the mouse striatum. In addition, the fate-changed D2-like MSNs survived normally in adulthood. Taken together, our findings supported that Sp9 was sufficient to promote D2-MSN identity and repress D1-MSN identity, and Sp9 was a negative regulator of D1-MSN fate.

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Sigma-Aldrich
Anti-EBF-1 Antibody, from rabbit, purified by affinity chromatography