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Functional characterization of full-length BARD1 strengthens its role as a tumor suppressor in neuroblastoma.

ABSTRACT: BARD1 is associated with the development of high-risk neuroblastoma patients. Particularly, the expression of full length (FL) isoform, FL BARD1, correlates to high-risk neuroblastoma development and its inhibition is sufficient to induce neuroblastoma cells towards a worst phenotype. Here we have investigated the mechanisms of FL BARD1 in neuroblastoma cell lines depleted for FL BARD1 expression. We have shown that FL BARD1 expression protects the cells from spontaneous DNA damage and from damage accumulated after irradiation. We demonstrated a role for FL BARD1 as tumor suppressor to prevent unscheduled mitotic entry of DNA damaged cells and to lead to death cells that have bypassed cell cycle checkpoints. FL BARD1-depleted cells that have survived to checkpoints acquire features of aggressiveness. Overall, our results show that FL BARD1 may defend cells against cancer and prevent malignant transformation of cells.

SUBMITTER: Cimmino F 

PROVIDER: S-EPMC6995383 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Functional characterization of full-length BARD1 strengthens its role as a tumor suppressor in neuroblastoma.

Cimmino Flora F   Avitabile Marianna M   Lasorsa Vito Alessandro VA   Pezone Lucia L   Cardinale Antonella A   Montella Annalaura A   Cantalupo Sueva S   Iolascon Achille A   Capasso Mario M  

Journal of Cancer 20200114 6

<i>BARD1</i> is associated with the development of high-risk neuroblastoma patients. Particularly, the expression of full length (FL) isoform, FL <i>BARD1</i>, correlates to high-risk neuroblastoma development and its inhibition is sufficient to induce neuroblastoma cells towards a worst phenotype. Here we have investigated the mechanisms of FL <i>BARD1</i> in neuroblastoma cell lines depleted for FL <i>BARD1</i> expression. We have shown that FL <i>BARD1</i> expression protects the cells from s  ...[more]

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