Activation of XBP1s attenuates disease severity in models of proteotoxic Charcot-Marie-Tooth type 1B.

ABSTRACT: Mutations in myelin protein zero (MPZ) are generally associated with Charcot-Marie-Tooth type 1B (CMT1B) disease, one of the most common forms of demyelinating neuropathy. Pathogenesis of some MPZ mutants, such as S63del and R98C, involves the misfolding and retention of MPZ in the endoplasmic reticulum (ER) of myelinating Schwann cells. To cope with proteotoxic ER stress, Schwann cells mount an unfolded protein response (UPR) characterized by activation of the PERK, ATF6 and IRE1α/XBP1 pathways. Previous results showed that targeting the PERK UPR pathway mitigates neuropathy in mouse models of CMT1B; however, the contributions of other UPR pathways in disease pathogenesis remain poorly understood. Here, we probe the importance of IRE1α/XBP1 signalling during normal myelination and in CMT1

SUBMITTER: Touvier T 

PROVIDER: S-EPMC12129742 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature