The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Autophagosomes initiate distally and mature during transport toward the cell soma in primary neurons
Open accessAbstract
Autophagy is an essential cellular degradation pathway in neurons; defects in autophagy are sufficient to induce neurodegeneration. In this paper, we investigate autophagosome dynamics in primary dorsal root ganglion neurons. Autophagosome biogenesis occurs distally in a constitutive process at the neurite tip. Autophagosomes initially move bidirectionally and then switch to unidirectional, processive movement toward the cell soma driven by dynein. Autophagosomes copurify with anterograde and retrograde motors, suggesting that the activity of bound kinesin motors is effectively down-regulated to yield robust retrograde motility driven by dynein. Both organelle and soluble cargoes are internalized into autophagosomes, including mitochondria and ubiquitin. As autophagosomes move distally to proximally, they undergo maturation and become increasingly acidified, consistent with the formation of an autolysosomal compartment that may more efficiently degrade cargo. This maturation is accompanied by a switch to bidirectional motility characteristic of lysosomes. Together, autophagosome biogenesis and maturation in primary neurons is a constitutive process that is spatially and temporally regulated along the axon.
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“Lysosomes fuse with autophagosome in the distal axon, and they mature on the way back to the soma (Maday et al., 2012).”
From TMEM55B promotes anterograde transport and distal axonal distribution of LAMP1-positive organelles (2026) · cites this paper as Maday et al., 2012
Experimental — accuracy not yet measuredThe cited source says what the claim attributes to it.
In the citing paper
“Autophagosome trafficking along axons was recently described.31”
From Measurement of autophagy flux in the nervous system in vivo (2013) · cites this paper as [31]
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In the citing paper
“Remarkably, the velocities obtained were in the same order of magnitude to the ones recently reported for autophagosomes in axons of DRGs obtained from LC3-GFP transgenic mice.31”
From Measurement of autophagy flux in the nervous system in vivo (2013) · cites this paper as [31]
In the citing paper
“Newly-formed autophagosomes in neuronal processes undergo retrograde transport to the soma and proximal segments of neurites to fuse with somatodendritic lysosomes for cargo degradation, with maturation and acidification of the autophagosomal lumen developing en passant [370,372,374].”
From Autophagy and ALS: mechanistic insights and therapeutic implications (2022) · cites this paper as [372]
In the citing paper
“Autophagy initiation typically begins outside of the soma, in the distal axon tip [370,372,373].”
From Autophagy and ALS: mechanistic insights and therapeutic implications (2022) · cites this paper as [372]
In the citing paper
“Bidirectional movements have been reported for a variety of organelles and vesicles (Welte, 2004), including even those that move persistently in one direction, such as mitochondria (Saxton and Hollenbeck, 2012), autophagosomes (Maday et al., 2012), and vesicles (Encalada et al., 2011), as they undergo axonal transport.”
From Microtubule motors transport phagosomes in the RPE, and lack of KLC1 leads to AMD-like pathogenesis (2015) · cites this paper as Maday et al., 2012
In the citing paper
“puncta may be numerous in neurites, especially within dystrophic swellings and, in many cases, these vacuoles are amphisomes or autolysosomes, reflecting the delayed or inhibited degradation of LC3 despite the presence of abundant hydrolase activity [77,84].”
From Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition) 1 (2021) · cites this paper as [84]
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Citations
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Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition) 1
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“In addition, distal formation and retrograde transport of autophagosomes in axons of primary neurons have been reported and mitochondrial markers have been observed in these autophagosomes.(110) Nevertheless, it is not certain that retrograde transport of an autophagosome to the soma is strictly required as lysosomal…”
BackgroundWong, Y. C., & Holzbaur, E. L. F. (2014) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1405752111 · Cited by 812
“This process of LC3 puncta to ring formation lasted ∼5 min, similar to the kinetics of basal autophagy observed in primary neurons (37).”
ResultSelf-citationAxonal transport deficits and neurodegenerative diseases
Millecamps, S., & Julien, J.-P. (2013) · Nature Reviews Neuroscience · doi:10.1038/nrn3380 · Cited by 755
Mammalian Autophagy: How Does It Work?
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Metadata
- Authors
- Maday, S., Wallace, K. E., & Holzbaur, E. L. F.
- Affiliations
- University of Pennsylvania (US)
- Corresponding author
- Maday, Sandra
- Holzbaur, Erika L.F.
- Venue
- Journal of Cell Biology
- Publisher
- Rockefeller University Press
- Published
- 2012-02-13
- Volume
- 196
- Issue
- 4
- Pages
- 407-417
- ISSN
- 0021-9525 (ISSN-L)
- 1540-8140
- PMC
- PMC3283992
- OpenAlex
- W2137686667
- Cited by
- 681
- References
- 30
- Citations by year
- 2026: 34 · 2025: 45 · 2024: 56 · 2023: 37 · 2022: 66 · 2021: 65 · 2020: 52 · 2019: 55 · 2018: 53 · 2017: 39 · 2016: 47 · 2015: 52 · 2014: 38 · 2013: 27 · 2012: 13
- FWCI
- 31.13
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- cc-by-nc-sa
- Locations
- The Journal of Cell Biology (publishedVersion, cc-by-nc-sa)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion, cc-by-nc-sa)
- PubMed (publishedVersion)
- Funders
- National Institute of Neurological Disorders and Stroke (R37NS060698, NS060698, R01NS060698)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Autophagy in Disease and Therapy
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
- Keywords
- autophagosomes, autophagy, dorsal root ganglion neurons, axonal transport, dynein, kinesin, retrograde transport, autophagosome maturation, autolysosomes, lysosomes, mitochondria, ubiquitin, neurodegeneration
- MeSH terms
- Superoxide Dismutase-1, Animals, Autophagy, Axons, Biological Transport, Cell Compartmentation, Dyneins, Fluorescent Antibody Technique, Image Processing, Computer-Assisted, Mice, Transgenic, Neurons, Phagosomes, Superoxide Dismutase, Green Fluorescent Proteins, Mice
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