PreprintCited by 1Autophagy in Disease and TherapyPI3K/AKT/mTOR signaling in cancerCalcium signaling and nucleotide metabolism

VPS34 in Autophagy, Cancer and Cancer Therapy

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Bartolini, Elisabetta, Janji, Bassam, Gao, Ruize·2026·Cells

Abstract

Autophagy is a fundamental lysosome-dependent degradation process, which maintains cellular homeostasis in response to stress. VSP34 (Vacuolar Protein Sorting 34, PIK3C3), as the only Class III phosphatidylinositol 3-kinase, generates phosphatidylinositol 3-phosphate (PI3P) for au-to-phagosome nucleation and maturation, thereby providing a critical adaptive survival pathway for cells experiencing metabolic stress. The VPS34-autophagy axis displays a context-dependent dual roles in cancer: it can restrain early tumorigenesis; however, in established tumors it can promote survival under hypoxia, nutrient deprivation, and therapeutic pressure. Additionally, VPS34 shapes the tumor microenvironment (TME) by influencing both immune and cancer cells through modulating autophagy, cGAS-STING (cyclic GMP-AMP synthase Stimulator of Interfer-on Genes) and STAT1 pathways. VPS34 inhibition has been reported to induce interferon response that enhance CD8+ T and natural killer (NK) cell infiltration and convert cold tumor into hot, providing a rationale for combination of VPS34 inhibitors with cancer immunotherapies. In this review, we summarize the molecular functions and regulations of VPS34 in autophagy and dis-cuss recent advances linking VPS34 to tumor and cancer immunotherapy.

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  • The PI3K/AKT/mTOR pathway is a major downstream signaling cascade of EGFR and represents an important bypass mechanism contributing to resistance to cetuximab and panitumumab.

    “The phosphoinositide 3-kinase (PI3K)/AKT/mTOR pathway is a major downstream signaling cascade of EGFR and represents an important bypass mechanism contributing to resistance to cetuximab and panitumumab [40,41,42,43,44].”

    From Overcoming Resistance to Anti-EGFR Therapies: Mechanisms of Cetuximab and Panitumumab Resistance and Emerging Combination Strategies (2026) · cites this paper as [43]

    The Introduction describes PI3K classes, and §7.2 discusses VPS34 inhibitors and resistance to other therapies. Neither passage addresses PI3K/AKT/mTOR as an EGFR downstream pathway or a bypass mechanism for resistance to cetuximab or panitumumab. Searches for those drugs and for EGFR downstream bypass signaling found no supporting passage in our copy. (LLM, conf=0.74)

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Research works printed but not linked: 7

  1. Preprints.org (www.preprints.org) | NOT PEER-REVIEWED | Posted: 4 March 2026 doi:10.20944/preprints202603.0323.v1
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  6. Paulo Antas, M.D.M., Fátima Leite-Pinheiro, Daniela Barros, Carlota Ramalhinho, Andreia Mendes, Beatriz H. Ferreira, Daniela Carvoeiro, Marisa Reverendo, Iola F. Duarte, Miwako Narita, Bing Su, Rafael J. Argüello, Beatrice Nal,..Evelina Ga i. VPS34-IN1 inhibits cap-mediated translation and synergizes with STING to drive type-I IFN expression in human plasmacytoid DCs. bioRxiv 2024.
  7. Schlütermann, D., Skowron, M. A., Berleth, N., Böhler, P., Deitersen, J., Stuhldreier, F., Wallot-Hieke, N., Wu, W., Peter, C., Hoffmann, M. J., Niegisch, G., & Stork, B. Targeting urothelial carcinoma cells by combining cisplatin with a specific inhibitor of the autophagy-inducing class III PtdIns3K complex. Urologic oncology 2018. Disclaimer/Publisher's Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. Preprints.org (www.preprints.org) | NOT PEER-REVIEWED | Posted: 4 March 2026 doi:10.20944/preprints202603.0323.v1

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Authors
Bartolini, E., Janji, B., & Gao, R.
Affiliations
  • University of Luxembourg (LU)
  • Luxembourg Institute of Health (LU)
Venue
Cells
Publisher
MDPI AG
Published
2026-03-04
Volume
15
Issue
7
Pages
636-636
ISSN
2073-4409 (ISSN-L)
OpenAlex
W7148428204
Cited by
1
References
140
Citations by year
2026: 1
FWCI
1.15
Type
journal article
Language
en
Open access
Locations
  • Cells (publishedVersion, cc-by)
  • Preprints.org (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fondation du Pélican de Mie et Pierre Hippert-Faber
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
Vps34, PIK3C3, autophagy, class III phosphatidylinositol 3-kinase, phosphatidylinositol 3-phosphate, tumor microenvironment, cancer immunotherapy, cGAS-STING pathway, STAT1, interferon response, cold tumor conversion, tumor hypoxia, nutrient deprivation, CD8+ T cell infiltration, natural killer cells
MeSH terms
cGAS-STING Signaling Pathway, Animals, Autophagy, Humans, Neoplasms, Class III Phosphatidylinositol 3-Kinases, Tumor Microenvironment

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