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Mt-Keima detects PINK1-PRKN mitophagy in vivo with greater sensitivity than mito-QC.


ABSTRACT: PINK1 and PRKN, which cause Parkinson disease when mutated, form a quality control mitophagy pathway that is well-characterized in cultured cells. The extent to which the PINK1-PRKN pathway contributes to mitophagy in vivo, however, is controversial. This is due in large part to conflicting results from studies using one of two mitophagy reporters: mt-Keima or mito-QC. Studies using mt-Keima have generally detected PINK1-PRKN mitophagy in vivo, whereas those using mito-QC generally have not. Here, we directly compared the performance of mito-QC and mt-Keima in cell culture and in mice subjected to a PINK1-PRKN activating stress. We found that mito-QC was less sensitive than mt-Keima for mitophagy, and that this difference was more pronounced for PINK1-PRKN mitophagy. These findings suggest that mito-QC's poor sensitivity may account for conflicting reports of PINK1-PRKN mitophagy in vivo and caution against using mito-QC as a reporter for PINK1-PRKN mitophagy.Abbreviations: DFP: deferiprone; EE: exhaustive exercise; FBS: fetal bovine serum; OAQ: oligomycin, antimycin, and Q-VD-OPH; OMM: outer mitochondrial membrane; PBS: phosphate-buffered saline; PD: Parkinson disease; UPS: ubiquitin-proteasome system.

SUBMITTER: Liu YT 

PROVIDER: S-EPMC8632312 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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Mt-Keima detects PINK1-PRKN mitophagy <i>in vivo</i> with greater sensitivity than mito-QC.

Liu Yi-Ting YT   Sliter Danielle A DA   Shammas Mario K MK   Huang Xiaoping X   Wang Chunxin C   Calvelli Hannah H   Maric Dragan S DS   Narendra Derek P DP  

Autophagy 20210308 11


PINK1 and PRKN, which cause Parkinson disease when mutated, form a quality control mitophagy pathway that is well-characterized in cultured cells. The extent to which the PINK1-PRKN pathway contributes to mitophagy <i>in vivo</i>, however, is controversial. This is due in large part to conflicting results from studies using one of two mitophagy reporters: mt-Keima or mito-QC. Studies using mt-Keima have generally detected PINK1-PRKN mitophagy <i>in vivo</i>, whereas those using mito-QC generally  ...[more]

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