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Hsp70/Hsp90 Chaperone Pathway in Parkinson's Disease

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Hsp70/Hsp90 Chaperone Pathway in Parkinson's Disease

Overview

The Hsp70/Hsp90 molecular chaperone system represents a critical component of the cellular proteostasis network that is particularly relevant to Parkinson's Disease (PD) pathogenesis. These heat shock proteins coordinate protein folding, assembly of protein complexes, and targeting of misfolded proteins for degradation, thereby protecting neurons from the toxic effects of [alpha-synuclein](/proteins/alpha-synuclein) aggregation and other proteostatic stressors central to PD pathophysiology[@chaperone2020].

In PD, the chaperone system faces extraordinary challenges due to the progressive accumulation of misfolded [alpha-synuclein](/proteins/alpha-synuclein), mitochondrial proteins damaged by oxidative stress, and endoplasmic reticulum stress resulting from cellular dysfunction. Understanding how Hsp70 and Hsp90 function—and how they fail—in dopaminergic neurons provides critical insights into disease mechanisms and therapeutic opportunities[@molecular2022].

The Hsp70/Hsp90 Chaperone Machinery

HSP70 Family Members in the Brain

The HSP70 family encompasses multiple isoforms with distinct cellular localizations and functions in the brain:

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