Journal
JOURNAL OF CELL BIOLOGY
Volume 217, Issue 5, Pages 1613-1622Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.201801044
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Funding
- Medical Research Council [MC-A070-5PSB0, MC_UU_00015/6]
- European Research Council [309742]
- Medical Research Council
- National Institutes of Health [P40OD018537]
- European Research Council (ERC) [309742] Funding Source: European Research Council (ERC)
- MRC [MC_UP_1501/1, MC_UU_00015/6] Funding Source: UKRI
- Medical Research Council [MC_UP_1501/1, MC_UU_00015/6, 1804239] Funding Source: researchfish
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The Parkinson's disease factors PINK1 and parkin are strongly implicated in stress-induced mitophagy in vitro, but little is known about their impact on basal mitophagy in vivo. We generated transgenic Drosophila melanogaster expressing fluorescent mitophagy reporters to evaluate the impact of Pink1/parkin mutations on basal mitophagy under physiological conditions. We find that mitophagy is readily detectable and abundant in many tissues, including Parkinson's diseaserelevant dopaminergic neurons. However, we did not detect mitolysosomes in flight muscle. Surprisingly, in Pink1 or parkin null flies, we did not observe any substantial impact on basal mitophagy. Because these flies exhibit locomotor defects and dopaminergic neuron loss, our findings raise questions about current assumptions of the pathogenic mechanism associated with the PINK1/parkin pathway. Our findings provide evidence that Pink1 and parkin are not essential for bulk basal mitophagy in Drosophila. They also emphasize that mechanisms underpinning basal mitophagy remain largely obscure.
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