Cited by 84Autophagy in Disease and TherapyPhagocytosis and Immune RegulationCell death mechanisms and regulation

Autophagy genes function sequentially to promote apoptotic cell corpse degradation in the engulfing cell

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Li, Wei, Zou, Wei, Yang, Yihong, Chai, Yongping, Chen, Baohui, Cheng, Shiya, Tian, Dong, Wang, Xiaochen +2 more·2012·Journal of Cell Biology

Abstract

Apoptotic cell degradation is a fundamental process for organism development, and impaired clearance causes inflammatory or autoimmune disease. Although autophagy genes were reported to be essential for exposing the engulfment signal on apoptotic cells, their roles in phagocytes for apoptotic cell removal are not well understood. In this paper, we develop live-cell imaging techniques to study apoptotic cell clearance in the Caenorhabditis elegans Q neuroblast lineage. We show that the autophagy proteins LGG-1/LC3, ATG-18, and EPG-5 were sequentially recruited to internalized apoptotic Q cells in the phagocyte. In atg-18 or epg-5 mutants, apoptotic Q cells were internalized but not properly degraded; this phenotype was fully rescued by the expression of autophagy genes in the phagocyte. Time-lapse analysis of autophagy mutants revealed that recruitment of the small guanosine triphosphatases RAB-5 and RAB-7 to the phagosome and the formation of phagolysosome were all significantly delayed. Thus, autophagy genes act within the phagocyte to promote apoptotic cell degradation.

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Crossref · 10.1083/jcb.201111053

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  • In Caenorhabditis elegans, LGG-1 (homolog of LC3) is recruited to the apoptotic Q neuroblast (Q cell) corpse.

    “Similarly, in Caenorhabditis elegans, LGG-1 (homolog of LC3) is recruited to the apoptotic Q neuroblast (Q cell) corpse [34].”

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Authors
Li, W., Zou, W., Yang, Y., Chai, Y., Chen, B., Cheng, S., Tian, D., Wang, X., Vale, R. D., & Ou, G.
Affiliations
  • Chinese Academy of Sciences (CN)
  • National Institute of Biological Sciences, Beijing (CN)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Wang, Xiaochen
  • Vale, Ronald D.
  • Ou, Guangshuo
Venue
Journal of Cell Biology
Published
2012-03-26
Volume
197
Issue
1
Pages
27-35
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2131771296
Cited by
84
References
30
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 2 · 2021: 3 · 2020: 5 · 2019: 4 · 2018: 6 · 2017: 8 · 2016: 12 · 2015: 5 · 2014: 8 · 2013: 7 · 2012: 14
FWCI
8.14
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • The Journal of Cell Biology (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
Howard Hughes Medical Institute
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
autophagy, efferocytosis, phagocytosis, phagosome, phagolysosomes, Caenorhabditis elegans, Rab5, Rab7, live-cell imaging
MeSH terms
Animals, Autophagy, Lysosomes, Mutation, Phagocytes, Phagocytosis, Phagosomes, Phenotype, Caenorhabditis elegans, Apoptosis, Caenorhabditis elegans Proteins, Vesicular Transport Proteins

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