Development of a protocol utilizing single-cell analysis for the differentiation of human iPSCs into SOX6+ midbrain dopaminergic neurons.
Lyu, G.; Garcia Swinburn, R.; Kreutzmann, J. C.; Xiong, A.; Kojima, R.; Abaurre, C.; Tremolanti, C.; Gellhaar, S.; Uhlen, P.; Svenningsson, P.; Castelo Branco, G.; Dagliyan, O.; Salto, C.; Arenas, E.
Show abstract
Parkinsons disease (PD) is characterized by the progressive loss of midbrain dopaminergic (mDA) neurons, leading to severe debilitating motor impairment. Recent single-cell analyses have revealed that specific mDA subpopulations, such as SOX6 AGTR1 neurons, are most vulnerable to degeneration. Current human pluripotent stem cell differentiation protocols fail to selectively generate these subtypes. Here, we describe a multiomic-guided strategy that enriches SOX6+ mDA neurons by combining enhancing Sonic Hedgehog agonism with prolonged Wnt activation. This approach accelerates floor plate specification, increases expression of mDA developmental markers, and substantially increases the yield of SOX6 mature mDA neurons compared to prior attempts. Following intrastriatal transplantation into hemiparkinsonian mice, these cells restored motor function in approximately 4 months and generated grafts containing SOX6 A9-like neurons. Our work thus establishes a reproducible differentiation platform for generating the PD-susceptible mDA subtype, providing a foundation for precision disease modelling and subtype-targeted cell replacement therapies.
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