Publications by authors named "Petra Kralova Viziova"

We show the ability of LACTB to function as a tumor suppressor in ovarian cancer through down-regulation of Slug and induction of differentiation.

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Article Synopsis
  • Epithelial-mesenchymal transition (EMT) allows cancer cells to move and behave like stem cells, contributing to tumor progression, particularly in ovarian cancer.
  • The study reveals that the mitochondrial protein LACTB acts as a tumor suppressor and is often found at lower levels in ovarian cancer cells and patient tissues.
  • By reintroducing LACTB, researchers found it hindered cancer cell growth and promoted differentiation, which reduces the stemness of the cells through inhibiting the EMT process and down-regulating key transcription factors.
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Background: LACTB was recently identified as a mitochondrial tumour suppressor that negatively affects cancer cell proliferation by inducing cell death and/or differentiation, depending on the cell type and tissue. However, the detailed mechanism underlying the LACTB-induced cancer cell death is largely unknown.

Methods: We used cell-based, either in 2D or 3D conditions, and in vivo experiments to understand the LACTB mechanisms.

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The mechanisms by which myelodysplastic syndrome (MDS) cells resist the effects of hypomethylating agents (HMA) are currently the subject of intensive research. A better understanding of mechanisms by which the MDS cell becomes to tolerate HMA and progresses to acute myeloid leukemia (AML) requires the development of new cellular models. From MDS/AML cell lines we developed a model of 5-azacytidine (AZA) resistance whose stability was validated by a transplantation approach into immunocompromised mice.

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Pancreatic cancer is one of the deadliest forms of cancer, which is attributed to lack of effective treatment options and drug resistance. Mitochondrial inhibitors have emerged as a promising class of anticancer drugs, and several inhibitors of the electron transport chain (ETC) are being clinically evaluated. We hypothesized that resistance to ETC inhibitors from the biguanide class could be induced by inactivation of SMAD4, an important tumor suppressor involved in transforming growth factor β (TGFβ) signaling, and associated with altered mitochondrial activity.

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