Th17 Cells in Parkinson’s Disease: The Bane of the Midbrain

Emerging data implicate potential roles for T cells in Parkinson's disease (PD); however, direct evidence for human T cells in PD-associated neurodegeneration has been lacking. In this issue of Cell Stem Cell, Sommer et al. (2018) demonstrate that IL-17-producing T cells from sporadic PD patients promote cell death of patient iPSC-derived midbrain neurons.

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