Evidence map›Paper›PMID 28705806›Full record

ArticleAmerican journal of physiology. Gastrointestinal and liver physiology2017

Roles of autophagy and metabolism in pancreatic cancer cell adaptation to environmental challenges.

Sandrina Maertin, Jason M Elperin, Ethan Lotshaw, Matthias Sendler, Steven D Speakman, Kazuki Takakura, Benjamin M Reicher, Olga A Mareninova, Paul J Grippo, Julia Mayerle and 2 more

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Gastrointestinal and liver physiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.6field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 29 citations in OpenAlex.

  1. Article
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  3. Review
  4. Article
  5. Review
  6. Review
  7. Article
  8. Review
  9. DDIT4 Novel Mutations in Pancreatic Cancer.Gastroenterology research and practice · 2021
    Article
  10. Review
  11. Review
  12. Review
  13. Review
  14. Associations of novel variants inAmerican journal of cancer research · 2020
    Article
  15. Article
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  17. Article
  18. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 5 institutions in 2 countries.

Sandrina MaertinVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Jason M ElperinVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Ethan LotshawVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Matthias SendlerDepartment of Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany.
Steven D SpeakmanVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Kazuki TakakuraVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Benjamin M ReicherVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Olga A MareninovaVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California.
Paul J GrippoDepartment of Medicine, University of Illinois-Chicago, Chicago, Illinois; and.
Julia MayerleDepartment of Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany.
Markus M LerchDepartment of Medicine A, Ernst-Moritz-Arndt University, Greifswald, Germany.
Anna S GukovskayaVeterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California; agukovsk@ucla.edu.
University of California, Los Angeles · USVA Greater Los Angeles Healthcare System · USUniversität Greifswald · DELudwig-Maximilians-Universität München · DEUniversity of Illinois Chicago · US

Funding

Vector and Human Acinar CoreP01DK098108 · NIDDK · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI PANDOL, STEPHEN J. · 2014 to 2018
$8.1M
Targeting diet-induced promotion of Kras-initiated pancreatic adenocarcinomaP01CA163200 · NCI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI PANDOL, STEPHEN J. · 2012 to 2016
$6.2M
NCI NIH HHS P01 CA163200NIDDK NIH HHS P01 DK098108
6 · The paper itself

Abstract

Pancreatic ductal adenocarcinoma (PDAC) displays extensive and poorly vascularized desmoplastic stromal reaction, and therefore, pancreatic cancer (PaCa) cells are confronted with nutrient deprivation and hypoxia. Here, we investigate the roles of autophagy and metabolism in PaCa cell adaptation to environmental stresses, amino acid (AA) depletion, and hypoxia. It is known that in healthy cells, basal autophagy is at a low level, but it is greatly activated by environmental stresses. By contrast, we find that in PaCa cells, basal autophagic activity is relatively high, but AA depletion and hypoxia activate autophagy only weakly or not at all, due to their failure to inhibit mechanistic target of rapamycin. Basal, but not stress-induced, autophagy is necessary for PaCa cell proliferation, and AA supply is even more critical to maintain PaCa cell growth. To gain insight into the underlying mechanisms, we analyzed the effects of autophagy inhibition and AA depletion on PaCa cell metabolism. PaCa cells display mixed oxidative/glycolytic metabolism, with oxidative phosphorylation (OXPHOS) predominant. Both autophagy inhibition and AA depletion dramatically decreased OXPHOS; furthermore, pharmacologic inhibitors of OXPHOS suppressed PaCa cell proliferation. The data indicate that the maintenance of OXPHOS is a key mechanism through which autophagy and AA supply support PaCa cell growth. We find that the expression of oncogenic activation mutation in GTPase Kras markedly promotes basal autophagy and stimulates OXPHOS through an autophagy-dependent mechanism. The results suggest that approaches aimed to suppress OXPHOS, particularly through limiting AA supply, could be beneficial in treating PDAC.

Indexed as

AutophagyTumor MicroenvironmentAdaptation, PhysiologicalAmino AcidsCarcinoma, Pancreatic DuctalCathepsinsCell Line, TumorCell ProliferationHumansHypoxiaMutationOxidative PhosphorylationOxidative StressPancreatic NeoplasmsAmino AcidsCathepsinsautophagycell growthcell metabolismmitochondriapancreatic cancer

Identifiers

PMID28705806
PMCPMC5792215
OpenAlexW2734389309

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.