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T cells modulate disease associated neuroinflammation in Parkinson’s disease (PD). We report that circulating CD4 + T cells from people with PD have a dysregulated transcriptional and cytokine response to fasting and refeeding and an altered metabolic profile. The CD4 + T cell secretome mediates a metabolic program in neurons that is impaired in PD, revealing dysfunctional neuro-immune signalling that may contribute to disease pathology.
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Austin‐Muttitt et al. (2026) studied this question.