: The process in which locally confined epithelial malignancies progressively evolve into invasive cancers is often promoted by unjamming, a phase transition from a solid-like to a liquid-like state, which occurs in various tissues. Whether this tissue-level mechanical transition impacts phenotypes during carcinoma progression remains unclear. Here we report that the large fluctuations in cell density that accompany unjamming result in repeated mechanical deformations of cells and nuclei. This triggers a cellular mechano-protective mechanism involving an increase in nuclear size and rigidity, heterochromatin redistribution and remodelling of the perinuclear actin architecture into actin rings. The chronic strains and stresses associated with unjamming together with the reduction of Lamin B1 levels eventually result in DNA damage and nuclear envelope ruptures, with the release of cytosolic DNA that activates a cGAS-STING (cyclic GMP-AMP synthase-signalling adaptor stimulator of interferon genes)-dependent cytosolic DNA response gene program. This mechanically driven transcriptional rewiring ultimately alters the cell state, with the emergence of malignant traits, including epithelial-to-mesenchymal plasticity phenotypes and chemoresistance in invasive breast carcinoma.

Frittoli, E., Palamidessi, A., Iannelli, F., Zanardi, F., Villa, S., Barzaghi, L., et al. (2022). Tissue fluidification promotes a cGAS-STING cytosolic DNA response in invasive breast cancer. NATURE MATERIALS [10.1038/s41563-022-01431-x].

Tissue fluidification promotes a cGAS-STING cytosolic DNA response in invasive breast cancer

Cancila, Valeria;Tripodo, Claudio;
2022-12-29

Abstract

: The process in which locally confined epithelial malignancies progressively evolve into invasive cancers is often promoted by unjamming, a phase transition from a solid-like to a liquid-like state, which occurs in various tissues. Whether this tissue-level mechanical transition impacts phenotypes during carcinoma progression remains unclear. Here we report that the large fluctuations in cell density that accompany unjamming result in repeated mechanical deformations of cells and nuclei. This triggers a cellular mechano-protective mechanism involving an increase in nuclear size and rigidity, heterochromatin redistribution and remodelling of the perinuclear actin architecture into actin rings. The chronic strains and stresses associated with unjamming together with the reduction of Lamin B1 levels eventually result in DNA damage and nuclear envelope ruptures, with the release of cytosolic DNA that activates a cGAS-STING (cyclic GMP-AMP synthase-signalling adaptor stimulator of interferon genes)-dependent cytosolic DNA response gene program. This mechanically driven transcriptional rewiring ultimately alters the cell state, with the emergence of malignant traits, including epithelial-to-mesenchymal plasticity phenotypes and chemoresistance in invasive breast carcinoma.
Settore MED/08 - Anatomia Patologica
Settore MED/05 - Patologia Clinica
Frittoli, E., Palamidessi, A., Iannelli, F., Zanardi, F., Villa, S., Barzaghi, L., et al. (2022). Tissue fluidification promotes a cGAS-STING cytosolic DNA response in invasive breast cancer. NATURE MATERIALS [10.1038/s41563-022-01431-x].
File in questo prodotto:
File Dimensione Formato  
Tissue fluidificantion promotes a cGas-STING cytosolic DNA response in invasive breast cancer..pdf

accesso aperto

Tipologia: Versione Editoriale
Dimensione 8.63 MB
Formato Adobe PDF
8.63 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/578917
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact