6533b7d9fe1ef96bd126d6b2

RESEARCH PRODUCT

Pharmacological disruption of the MID1/α4 interaction reduces mutant Huntingtin levels in primary neuronal cultures.

Rachel BuxtonJeremy J. LambertAngela BridgesRosamund F. LangstonArgyrides ArgyrouEmma J. JonesChristina Pancevac JönssonSusann SchweigerOlivia MonteiroKelly M GatfieldChangwei ChenRyan P. BinghamSybille KraußIain Uings

subject

0301 basic medicinecongenital hereditary and neonatal diseases and abnormalitiesHuntingtinMid1 protein mouseProtein subunitUbiquitin-Protein LigasesMutantPrimary Cell CulturePeptide03 medical and health sciencesMiceHuntington's diseasemental disordersmedicineAnimalsHumansHtt protein mouseddc:610Protein Phosphatase 2Neuronschemistry.chemical_classificationMessenger RNAHuntingtin ProteinbiologyChemistryGeneral NeuroscienceProteinsgenetics [Huntingtin Protein]metabolism [Protein Phosphatase 2]metabolism [Proteins]Protein phosphatase 2medicine.diseaseUbiquitin ligaseCell biology030104 developmental biologyHEK293 Cellsmetabolism [Neurons]metabolism [Huntingtin Protein]Mutationbiology.proteinProtein Binding

description

Expression of mutant Huntingtin (HTT) protein is central to the pathophysiology of Huntington's Disease (HD). The E3 ubiquitin ligase MID1 appears to have a key role in facilitating translation of the mutant HTT mRNA suggesting that interference with the function of this complex could be an attractive therapeutic approach. Here we describe a peptide that is able to disrupt the interaction between MID1 and the α4 protein, a regulatory subunit of protein phosphatase 2A (PP2A). By fusing this peptide to a sequence from the HIV-TAT protein we demonstrate that the peptide can disrupt the interaction within cells and show that this results in a decrease in levels of ribosomal S6 phosphorylation and HTT expression in cultures of cerebellar granule neurones derived from HdhQ111/Q7 mice. This data serves to validate this pathway and paves the way for the discovery of small molecule inhibitors of this interaction as potential therapies for HD.

yearjournalcountryeditionlanguage
2017-09-29
10.1016/j.neulet.2018.02.061