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- Title
Interleukin-17 and Th17 Lymphocytes Directly Impair Motoneuron Survival of Wildtype and FUS-ALS Mutant Human iPSCs.
- Authors
Jin, Mengmeng; Akgün, Katja; Ziemssen, Tjalf; Kipp, Markus; Günther, Rene; Hermann, Andreas
- Abstract
Amyotrophic lateral sclerosis (ALS) is a progressive disease leading to the degeneration of motor neurons (MNs). Neuroinflammation is involved in the pathogenesis of ALS; however, interactions of specific immune cell types and MNs are not well studied. We recently found a shift toward T helper (Th)1/Th17 cell-mediated, pro-inflammatory immune responses in the peripheral immune system of ALS patients, which positively correlated with disease severity and progression. Whether Th17 cells or their central mediator, Interleukin-17 (IL-17), directly affects human motor neuron survival is currently unknown. Here, we evaluated the contribution of Th17 cells and IL-17 on MN degeneration using the co-culture of iPSC-derived MNs of fused in sarcoma (FUS)-ALS patients and isogenic controls with Th17 lymphocytes derived from ALS patients, healthy controls, and multiple sclerosis (MS) patients (positive control). Only Th17 cells from MS patients induced severe MN degeneration in FUS-ALS as well as in wildtype MNs. Their main effector, IL-17A, yielded in a dose-dependent decline of the viability and neurite length of MNs. Surprisingly, IL-17F did not influence MNs. Importantly, neutralizing IL-17A and anti-IL-17 receptor A treatment reverted all effects of IL-17A. Our results offer compelling evidence that Th17 cells and IL-17A do directly contribute to MN degeneration.
- Subjects
MOTOR neurons; AMYOTROPHIC lateral sclerosis; INTERLEUKIN-17; T helper cells; LYMPHOCYTES; DISEASE progression; NEUROINFLAMMATION; PATHOGENESIS
- Publication
International Journal of Molecular Sciences, 2021, Vol 22, Issue 15, p8042
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms22158042