Cited by 1,683Cellular transport and secretionCancer, Hypoxia, and MetabolismPI3K/AKT/mTOR signaling in cancer

Macropinocytosis of protein is an amino acid supply route in Ras-transformed cells

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Commisso, Cosimo, Davidson, Shawn M., Soydaner-Azeloglu, Rengin G., Parker, Seth J., Kamphorst, Jurre J., Hackett, Sean, Grabocka, Elda, Nofal, Michel +6 more·2013·Nature

Abstract

Macropinocytosis is a highly conserved endocytic process by which extracellular fluid and its contents are internalized into cells through large, heterogeneous vesicles known as macropinosomes. Oncogenic Ras proteins have been shown to stimulate macropinocytosis but the functional contribution of this uptake mechanism to the transformed phenotype remains unknown. Here we show that Ras-transformed cells use macropinocytosis to transport extracellular protein into the cell. The internalized protein undergoes proteolytic degradation, yielding amino acids including glutamine that can enter central carbon metabolism. Accordingly, the dependence of Ras-transformed cells on free extracellular glutamine for growth can be suppressed by the macropinocytic uptake of protein. Consistent with macropinocytosis representing an important route of nutrient uptake in tumours, its pharmacological inhibition compromises the growth of Ras-transformed pancreatic tumour xenografts. These results identify macropinocytosis as a mechanism by which cancer cells support their unique metabolic needs and point to the possible exploitation of this process in the design of anticancer therapies.

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Crossref · 10.1038/nature12138

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  • Albumin uptake by cancer cells especially occurs in nutrient-deprived states and is regulated by mTORC1.

    “This especially occurs in nutrient‐deprived states and is regulated by mammalian target of rapamycin complex 1 (mTORC1), controlling protein synthesis.94”

    From Hypoalbuminemia: Pathogenesis and Clinical Significance (2019) · cites this paper as [94]

    The passage on glutamine deprivation (section labeled Abstract; page unavailable) reports that albumin supplementation helped Ras-transformed cells proliferate when glutamine was low, and that the benefit depended on macropinocytosis. It does not show that albumin uptake occurs especially during nutrient deprivation. Searches for mTORC1 and mammalian target of rapamycin found no passage supporting regulation of uptake by mTORC1 or the associated protein-synthesis claim. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • PDAC cells harboring KRAS* rely on increased levels of macropinocytosis for nutrient salvaging to sustain uncontrolled cell growth.

    “PDAC cells harboring KRAS∗ rely on increased levels of macropinocytosis for nutrient salvaging to sustain uncontrolled cell growth.14”
  • Macropinocytosis is a nutrient salvage process that supports oncogenic growth.

    “a nutrient salvage process that supports oncogenic growth.14”
  • PDAC cells utilize macropinocytosis to obtain amino acids through uptake and degradation of albumin and collagen.

    “PDAC cells utilize macropinocytosis to obtain amino acids through the uptake and degradation of albumin and collagen230–232”

    From Pancreatic cancer: Advances and challenges (2023) · cites this paper as [230]

  • PDAC cells can utilize macropinocytosis to obtain proline from CAF-produced collagen.

    “PDAC cells can utilize macropinocytosis to obtain proline from CAF produced collagen230.”

    From Pancreatic cancer: Advances and challenges (2023) · cites this paper as [230]

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Authors
Commisso, C., Davidson, S. M., Soydaner-Azeloglu, R. G., Parker, S. J., Kamphorst, J. J., Hackett, S., Grabocka, E., Nofal, M., Drebin, J. A., Thompson, C. B., Rabinowitz, J. D., Metallo, C. M., Vander Heiden, M. G., & Bar-Sagi, D.
Affiliations
  • New York University (US)
  • Koch Institute for Integrative Cancer Research At MIT (US)
  • University of California San Diego (US)
  • Princeton University (US)
  • Hospital of the University of Pennsylvania (US)
  • Memorial Sloan Kettering Cancer Center (US)
Venue
Nature
Published
2013-05-12
Volume
497
Issue
7451
Pages
633-637
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2129917557
Cited by
1,683
References
31
Citations by year
2026: 120 · 2025: 130 · 2024: 130 · 2023: 136 · 2022: 162 · 2021: 186 · 2020: 166 · 2019: 135 · 2018: 129 · 2017: 113 · 2016: 119 · 2015: 79 · 2014: 56 · 2013: 20
FWCI
52.97
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
Funders
National Cancer Institute (R01CA055360, P01CA104838, R01CA105463, P30CA014051, P01CA117969, P30CA016087, R01CA163591)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
macropinocytosis, oncogenic Ras, amino acid supply, glutamine addiction, cancer metabolism, macropinosomes, protein degradation, pancreatic tumours, nutrient uptake, cancer therapy
MeSH terms
Amino Acids, Animals, Biological Transport, Carbon, Cell Line, Transformed, Cell Transformation, Neoplastic, Disease Models, Animal, Female, Glutamine, Mice, Nude, Pancreatic Neoplasms, Pinocytosis, Oncogene Protein p21(ras), NIH 3T3 Cells, Cell Line, Tumor, Cell Proliferation, Mice, Proteolysis

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