Cited by 681Autophagy in Disease and TherapyCellular transport and secretionCalcium signaling and nucleotide metabolism

Autophagosomes initiate distally and mature during transport toward the cell soma in primary neurons

Open access
Maday, Sandra, Wallace, Karen E., Holzbaur, Erika L.F.·2012·Journal of Cell Biology

Abstract

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.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1083/jcb.201106120

Cites

30 of 30 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Autophagosome trafficking along axons was recently described.

    “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]

  • The velocities obtained are in the same order of magnitude as those recently reported for autophagosomes in axons of DRGs from LC3-GFP transgenic mice.

    “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]

  • 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.

    “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].”
  • Autophagy initiation typically begins outside of the soma, in the distal axon tip.

    “Autophagy initiation typically begins outside of the soma, in the distal axon tip [370,372,373].”
  • Bidirectional movements have been reported for a variety of organelles and vesicles, including mitochondria, autophagosomes, and vesicles during axonal transport.

    “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.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

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
Published
2012-02-13
Volume
196
Issue
4
Pages
407-417
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
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
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
  • Health Sciences › Medicine › Epidemiology › 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

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review