Nature Communications (Jun 2023)

Increased glucose availability sensitizes pancreatic cancer to chemotherapy

  • Ali Vaziri-Gohar,
  • Jonathan J. Hue,
  • Ata Abbas,
  • Hallie J. Graor,
  • Omid Hajihassani,
  • Mehrdad Zarei,
  • George Titomihelakis,
  • John Feczko,
  • Moeez Rathore,
  • Sylwia Chelstowska,
  • Alexander W. Loftus,
  • Rui Wang,
  • Mahsa Zarei,
  • Maryam Goudarzi,
  • Renliang Zhang,
  • Belinda Willard,
  • Li Zhang,
  • Adam Kresak,
  • Joseph E. Willis,
  • Gi-Ming Wang,
  • Curtis Tatsuoka,
  • Joseph M. Salvino,
  • Ilya Bederman,
  • Henri Brunengraber,
  • Costas A. Lyssiotis,
  • Jonathan R. Brody,
  • Jordan M. Winter

DOI
https://doi.org/10.1038/s41467-023-38921-8
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 13

Abstract

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Abstract Pancreatic Ductal Adenocarcinoma (PDAC) is highly resistant to chemotherapy. Effective alternative therapies have yet to emerge, as chemotherapy remains the best available systemic treatment. However, the discovery of safe and available adjuncts to enhance chemotherapeutic efficacy can still improve survival outcomes. We show that a hyperglycemic state substantially enhances the efficacy of conventional single- and multi-agent chemotherapy regimens against PDAC. Molecular analyses of tumors exposed to high glucose levels reveal that the expression of GCLC (glutamate-cysteine ligase catalytic subunit), a key component of glutathione biosynthesis, is diminished, which in turn augments oxidative anti-tumor damage by chemotherapy. Inhibition of GCLC phenocopies the suppressive effect of forced hyperglycemia in mouse models of PDAC, while rescuing this pathway mitigates anti-tumor effects observed with chemotherapy and high glucose.