Inhibition of Drp1 hyperactivation reduces neuropathology and behavioral deficits in zQ175 knock-in mouse model of Huntington's disease.

Abstract:

:Mitochondrial dysfunction manifests in the pathogenesis of Huntington's disease (HD), a fatal and inherited neurodegenerative disease. Dynamin-related protein 1 (Drp1) is the primary component of mitochondrial fission and becomes hyperactivated in various models of HD. We previously reported that inhibition of Drp1 hyperactivation by P110, a rationally designed peptide inhibitor of Drp1-Fis1 interaction, is protective in the HD R6/2 mouse model, which expresses a fragment of mutant Huntingtin (mHtt). In this study, we expand our work to test the effect of P110 treatment in HD knock-in (zQ175 KI) mice that express full-length mtHtt and exhibit progressive disease symptoms, reminiscent of human HD. We find that subcutaneously sustained treatment with P110 reduces movement deficits of mice. Moreover, the treatment attenuates striatal neuronal loss, microglial hyperactivity and white matter disorganization in zQ175 KI mice. These findings provide an additional line of evidence that inhibition of Drp1 hyperactivation is sufficient to reduce HD-associated neuropathology and behavioral deficits. We propose that manipulation of Drp1 hyperactivation might be a useful strategy to develop therapeutics for treating HD.

authors

Zhao Y,Sun X,Qi X

doi

10.1016/j.bbrc.2018.11.031

subject

Has Abstract

pub_date

2018-12-09 00:00:00

pages

319-323

issue

1-4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(18)32437-9

journal_volume

507

pub_type

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