Publication:
The immune system in Parkinson's disease: what we know so far

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SCHOOL OF MEDICINE
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Roodveldt C, Bernardino L, Dragic M, Fladmark KE, Ertan S, Busra A, Pita C, Ciglar L, Garraux G, Williams-Gray C, Pacheco R, Romero-Ramos M.

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Abstract

Parkinson's disease is characterized neuropathologically by the degeneration of dopaminergic neurons in the ventral midbrain, the accumulation of alpha-synuclein (alpha-syn) aggregates in neurons and chronic neuroinflammation. In the past two decades, in vitro, ex vivo and in vivo studies have consistently shown the involvement of inflammatory responses mediated by microglia and astrocytes, which may be elicited by pathological alpha-syn or signals from affected neurons and other cell types, and are directly linked to neurodegeneration and disease development. Apart from the prominent immune alterations seen in the CNS, including the infiltration of T cells into the brain, more recent studies have demonstrated important changes in the peripheral immune profile within both the innate and adaptive compartments, particularly involving monocytes, CD4(+) and CD8(+) T cells. This review aims to integrate the consolidated understanding of immune-related processes underlying the pathogenesis of Parkinson's disease, focusing on both central and peripheral immune cells, neuron-glia crosstalk as well as the central-peripheral immune interaction during the development of Parkinson's disease. Our analysis seeks to provide a comprehensive view of the emerging knowledge of the mechanisms of immunity in Parkinson's disease and the implications of this for better understanding the overall pathogenesis of this disease.

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Oxford University Press

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Clinical neurology

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Brain

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10.1093/brain/awae177

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