The degeneration of nigral (A9) dopaminergic (DA) neurons causes motor symptoms in Parkinson’s disease (PD). We use small-molecule compounds to direct the differentiation of human induced pluripotent stem cells (iPSCs) to A9 DA neurons that share many important properties with their in vivo counterparts. The method generates a large percentage of TH+ neurons that express appropriate A9 markers, such as GIRK2 and ALDH1A1, but mostly not the A10 marker CALBINDIN. Functionally, they exhibit autonomous pacemaking based on L-type voltage-dependent Ca2+ channels and show autoreceptor-dependent regulation of dopamine release. When transplanted in the striatum of 6-OHDA-lesioned athymic rats, the human A9 DA neurons manifest robust survival and axon outgrowth, and ameliorate motor deficits in the rat PD model. The ability to generate patient-specific A9 DA autonomous pacemakers will significantly improve PD research and facilitate the development of disease-modifying therapies.
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We thank E.F. Trachtman for support and Meredith A. Juncker for reading the manuscript.
The work is supported in part by NYSTEM Contract C30290GG (fellowship for H.L.), National Institutes of Health grants NS102148 (J.F.), NS113763 (J.F.), and US Department of Veterans Affairs Merit Award BX003831 (J.F). VA resources are not used on human embryonic stem cells.
The authors declare no competing interests.
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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Li, H., Jiang, H., Li, H. et al. Generation of human A9 dopaminergic pacemakers from induced pluripotent stem cells. Mol Psychiatry (2022). https://doi.org/10.1038/s41380-022-01628-1