Spontaneous activity of the mitochondrial apoptosis pathway drives chromosomal defects, the appearance of micronuclei and cancer metastasis through the Caspase-Activated DNAse - Archive ouverte HAL Access content directly
Journal Articles Cell Death and Disease Year : 2022

Spontaneous activity of the mitochondrial apoptosis pathway drives chromosomal defects, the appearance of micronuclei and cancer metastasis through the Caspase-Activated DNAse

(1) , (1) , (1) , (1) , (1) , (1, 2) , (1) , (1) , (3, 4) , (3, 4) , (1) , (1) , (1, 2) , (1) , (5) , (5) , (5) , (1)
1
2
3
4
5
Aladin Haimovici
Christoph Höfer
Mohamed Tarek Badr
Nico Thilmany
Corinna Spohr
Georg Häcker

Abstract

Abstract Micronuclei are DNA-containing structures separate from the nucleus found in cancer cells. Micronuclei are recognized by the immune sensor axis cGAS/STING, driving cancer metastasis. The mitochondrial apoptosis apparatus can be experimentally triggered to a non-apoptotic level, and this can drive the appearance of micronuclei through the Caspase-activated DNAse (CAD). We tested whether spontaneously appearing micronuclei in cancer cells are linked to sub-lethal apoptotic signals. Inhibition of mitochondrial apoptosis or of CAD reduced the number of micronuclei in tumor cell lines as well as the number of chromosomal misalignments in tumor cells and intestinal organoids. Blockade of mitochondrial apoptosis or deletion of CAD reduced, while experimental activation CAD, STING-dependently, enhanced aggressive growth of tumor cells in vitro. Deletion of CAD from human cancer cells reduced metastasis in xenograft models. CAD-deficient cells displayed a substantially altered gene-expression profile, and a CAD-associated gene expression ‘signature’ strongly predicted survival in cancer patients. Thus, low-level activity in the mitochondrial apoptosis apparatus operates through CAD-dependent gene-induction and STING-activation and has substantial impact on metastasis in cancer.

Dates and versions

hal-03667748 , version 1 (13-05-2022)

Identifiers

Cite

Aladin Haimovici, Christoph Höfer, Mohamed Tarek Badr, Elham Bavafaye Haghighi, Tarek Amer, et al.. Spontaneous activity of the mitochondrial apoptosis pathway drives chromosomal defects, the appearance of micronuclei and cancer metastasis through the Caspase-Activated DNAse. Cell Death and Disease, 2022, 13 (4), pp.315. ⟨10.1038/s41419-022-04768-y⟩. ⟨hal-03667748⟩
8 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More