Cited by 75Autophagy in Disease and TherapyCell death mechanisms and regulationGenetics, Aging, and Longevity in Model Organisms

Distinct requirements of Autophagy-related genes in programmed cell death

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Xu, T, Nicolson, S, Denton, D, Kumar, S·2015·Cell Death & Differentiation

Abstract

Although most programmed cell death (PCD) during animal development occurs by caspase-dependent apoptosis, autophagy-dependent cell death is also important in specific contexts. In previous studies, we established that PCD of the obsolete Drosophila larval midgut tissue is dependent on autophagy and can occur in the absence of the main components of the apoptotic pathway. As autophagy is primarily a survival mechanism in response to stress such as starvation, it is currently unclear if the regulation and mechanism of autophagy as a pro-death pathway is distinct to that as pro-survival. To establish the requirement of the components of the autophagy pathway during cell death, we examined the effect of systematically knocking down components of the autophagy machinery on autophagy induction and timing of midgut PCD. We found that there is a distinct requirement of the individual components of the autophagy pathway in a pro-death context. Furthermore, we show that TORC1 is upstream of autophagy induction in the midgut indicating that while the machinery may be distinct the activation may occur similarly in PCD and during starvation-induced autophagy signalling. Our data reveal that while autophagy initiation occurs similarly in different cellular contexts, there is a tissue/function-specific requirement for the components of the autophagic machinery.

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Crossref · 10.1038/cdd.2015.28

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  • In D. melanogaster, autophagy-dependent midgut degradation proceeds independently of Atg7, Atg3, and several other Atg genes required for starvation-induced autophagy in fat body, but relies on Uba1.

    “For example, the autophagy-dependent degradation of the midgut tissue proceeds independently of Atg7, Atg3, and several other Atg genes that are required for starvation-induced autophagy in the fat body, but relies on ubiquitin activating enzyme 1 (Uba1) [837, 838].”
  • In D. melanogaster, molecular machinery of autophagy-dependent cell death and adaptive autophagy exhibit differences.

    “Of note, the molecular machinery of autophagy-dependent cell death and adaptative autophagy exhibit some differences (at least in D. melanogaster) [837, 838].”

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Authors
Xu, T., Nicolson, S., Denton, D., & Kumar, S.
Affiliations
University of South Australia (AU)
Corresponding author
  • Denton, D
  • Kumar, S
Venue
Cell Death & Differentiation
Published
2015-04-17
Volume
22
Issue
11
Pages
1792-1802
ISSN
  • 1350-9047 (ISSN-L)
  • 1476-5403
OpenAlex
W2054815464
Cited by
75
References
54
Citations by year
2026: 4 · 2025: 6 · 2024: 11 · 2023: 6 · 2022: 8 · 2021: 5 · 2020: 6 · 2019: 9 · 2018: 11 · 2017: 3 · 2016: 5 · 2015: 1
FWCI
5.23
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Differentiation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
Funders
  • University of South Australia
  • Medical Research Council
  • National Health and Medical Research Council (1041807, 1002863)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
autophagic cell death, programmed cell death, autophagy-related genes, TORC1, starvation-induced autophagy, autophagy initiation, gene knockdown
MeSH terms
Animals, Autophagy, Drosophila, Apoptosis, Real-Time Polymerase Chain Reaction

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