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Targeting NUPR1-dependent stress granules formation to induce synthetic lethality in KrasG12D-driven tumors

Fecha de publicación: Fecha Ahead of Print:

Autores de FISABIO

Autores ajenos a FISABIO

  • Santofimia-Castaño P
  • Fraunhoffer N
  • Liu X
  • Bessone IF
  • di Magliano MP
  • Audebert S
  • Camoin L
  • Estaras M
  • Brenière M
  • Modesti M
  • Lomberk G
  • Urrutia R
  • Soubeyran P
  • Iovanna J

Grupos de Investigación

Abstract

We find that NUPR1, a stress-associated intrinsically disordered protein, induced droplet formation via liquid-liquid phase separation (LLPS). NUPR1-driven LLPS was crucial for the creation of NUPR1-dependent stress granules (SGs) in pancreatic cancer cells since genetic or pharmacological inhibition by ZZW-115 of NUPR1 activity impeded SGs formation. The Kras(G12D) mutation induced oncogenic stress, NUPR1 overexpression, and promoted SGs development. Notably, enforced NUPR1 expression induced SGs formation independently of mutated Kras(G12D). Mechanistically, Kras(G12D) expression strengthened sensitivity to NUPR1 inactivation, inducing cell death, activating caspase 3 and releasing LDH. Remarkably, ZZW-115-mediated SG-formation inhibition hampered the development of pancreatic intraepithelial neoplasia (PanINs) in Pdx1-cre;LSL-Kras(G12D) (KC) mice. ZZW-115-treatment of KC mice triggered caspase 3 activation, DNA fragmentation, and formation of the apoptotic bodies, leading to cell death, specifically in Kras(G12D)-expressing cells. We further demonstrated that, in developed PanINs, short-term ZZW-115 treatment prevented NUPR1-associated SGs presence. Lastly, a four-week ZZW-115 treatment significantly reduced the number and size of PanINs in KC mice. This study proposes that targeting NUPR1-dependent SGs formation could be a therapeutic approach to induce cell death in Kras(G12D)-dependent tumors.

Datos de la publicación

ISSN/ISSNe:
1757-4684, 1757-4676

EMBO MOLECULAR MEDICINE  John Wiley & Sons Ltd.

Tipo:
Article
Páginas:
475-505
PubMed:
38360999

Citas Recibidas en Web of Science: 12

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Keywords

  • Kras; ZZW-115; Synthetic Lethality; Stress Granules; NUPR1

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