Cited by 212Neurobiology and Insect Physiology ResearchGenetics, Aging, and Longevity in Model OrganismsLipid metabolism and biosynthesis

The role of larval fat cells in adult Drosophila melanogaster

Aguila, Jerell R., Suszko, Justin, Gibbs, Allen G., Hoshizaki, Deborah K.·2007·Journal of Experimental Biology

Abstract

In the life history of holometabolous insects, distinct developmental stages are tightly linked to feeding and non-feeding periods. The larval stage is characterized by extensive feeding, which supports the rapid growth of the animal and allows accumulation of energy stores, primarily in the larval fat body. In Drosophila melanogaster access to these stores during pupal development is possible because the larval fat body is preserved in the pupa as individual fat cells. These larval fat cells are refractive to autophagic cell death that removes most of the larval cells during metamorphosis. The larval fat cells are thought to persist into the adult stage and thus might also have a nutritional role in the young adult. We used cell markers to demonstrate that the fat cells in the young adult are in fact dissociated larval fat body cells, and we present evidence that these cells are eventually removed in the adult by a caspase cascade that leads to cell death. By genetically manipulating the lifespan of the larval fat cells, we demonstrate that these cells are nutritionally important during the early, non-feeding stage of adulthood. We experimentally blocked cell death of larval fat cells using the GAL4/UAS system and found that in newly eclosed adults starvation resistance increased from 58 h to 72 h. Starvation survival was highly correlated with the number of remaining larval fat cells. We discuss the implications of these results in terms of the overall nutritional status of…

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Crossref · 10.1242/jeb.001586

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  • These cells survive metamorphosis and are present in the newly eclosed adult.

    “These cells survive metamorphosis (Aguila et al., 2007) and are present in the newly eclosed adult.”
  • Retention of larval fat cells by inhibition of PCD increases starvation resistance of older adults.

    “This difference is not age dependent per se, because retention of the larval fat cells by inhibition of PCD increases the starvation resistance of older adults (Aguila et al., 2007).”
  • In an earlier study, inhibiting normal PCD of larval fat cells increased starvation resistance in adult D. melanogaster.

    “In an earlier study, we showed that inhibiting normal PCD of the larval fat cells increased starvation resistance in adult D. melanogaster (Aguila et al., 2007).”
  • Starvation resistance declines when fat body stores are released and taken up by the ovaries.

    “yet starvation resistance declines (Aguila et al., 2007).”
  • The larval fat cells serve as 'meals-ready-to-eat' in the face of starvation, where newly eclosed females that still retain their larval fat cells are over twice as starvation resistant as older adults in which the larval fat cells have undergone PCD.

    “The larval fat cells also serve as 'meals-ready-to-eat' in the face of starvation (Aguila et al., 2007), where newly eclosed females that still retain their larval fat cells are over twice as starvation resistant as older adults in which the larval fat cells have undergone PCD.”

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Authors
Aguila, J. R., Suszko, J., Gibbs, A. G., & Hoshizaki, D. K.
Affiliations
University of Nevada, Las Vegas (US)
Corresponding author
  • Suszko, Justin
  • Hoshizaki, Deborah K.
Venue
Journal of Experimental Biology
Published
2007-03-15
Volume
210
Issue
6
Pages
956-963
ISSN
  • 0022-0949 (ISSN-L)
  • 1477-9145
OpenAlex
W2163016885
Cited by
212
References
0
Citations by year
2026: 5 · 2025: 21 · 2024: 12 · 2023: 12 · 2022: 16 · 2021: 19 · 2020: 22 · 2019: 15 · 2018: 13 · 2017: 4 · 2016: 9 · 2015: 11 · 2014: 8 · 2013: 9 · 2012: 8
FWCI
2.75
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Experimental Biology (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
larval fat body, Drosophila melanogaster, caspase-dependent cell death, autophagic cell death, energy reserves, nutritional status, holometabolous development, metamorphosis
MeSH terms
Aging, Animals, Drosophila melanogaster, Fluorescence, Food Deprivation, Larva, Cell Death, Adipocytes, Animals, Genetically Modified, Green Fluorescent Proteins

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