Artículo
Protein Kinase C Alpha (PKCα) overexpression leads to a better response to retinoid acid therapy through Retinoic Acid Receptor Beta (RARβ) activation in mammary cancer cells
Díaz Bessone, María Inés
; Berardi, Damian Emilio
; Cirigliano, Stéfano Martín
; Delbart, Damián Ignacio; Peters, María Giselle
; Todaro, Laura Beatriz
; Urtreger, Alejandro Jorge
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Fecha de publicación:
08/2020
Editorial:
Springer
Revista:
Journal Of Cancer Research And Clinical Oncology
ISSN:
0171-5216
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Purpose: Retinoids have proved to be effective for hematologic malignancies treatment but till nowadays, their use as single agent for the solid tumor’s management is still controversial. All-trans retinoic acid (ATRA), the main active metabolite of vitamin A, exerts non-genomic interactions with different members of the protein kinase C (PKC) family, recognized modulators of different tumor progression pathways. To determine whether a group of patients could become benefited employing a retinoid therapy, in this study we have evaluated whether PKCα expression (a poor prognosis marker in breast cancer) could sensitizes mammary cells to ATRA treatment. Methods: PKCα overexpression was achieved by stable transfection and confirmed by western blot. Transfected PKC functionality was determined by nuclear translocation-induction and confocal microscopy. In vitro proliferation was evaluated by cell counting and cell cycle distribution was analyzed by flow cytometry. In vivo studies were performed to evaluate orthotopic tumor growth and experimental lung colonization. Retinoic acid response elements (RARE) and AP1 sites-dependent activity was studied by gene reporter assays and retinoic acid receptors (RARs) were measured by RT-qPCR. Results: Our findings suggest that high PKCα levels improve the differentiation response to ATRA in a RAR signaling-dependent manner. Moreover, RARβ expression appears to be critical to induce ATRA sensitization, throughout AP1 trans-repression. Conclusion: Here we propose that retinoids could lead a highly personalized anticancer treatment, bringing benefits to patients with aggressive breast tumors resulting from high PKCα expression but, an adequate expression of the RARβ receptor is required to ensure the effect on this process.
Palabras clave:
ATRA
,
METASTASIS DISSEMINATION
,
PKCΑ
,
PROLIFERATION
,
TUMOR GROWTH
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Articulos(OCA HOUSSAY)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA HOUSSAY
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA HOUSSAY
Citación
Díaz Bessone, María Inés; Berardi, Damian Emilio; Cirigliano, Stéfano Martín; Delbart, Damián Ignacio; Peters, María Giselle; et al.; Protein Kinase C Alpha (PKCα) overexpression leads to a better response to retinoid acid therapy through Retinoic Acid Receptor Beta (RARβ) activation in mammary cancer cells; Springer; Journal Of Cancer Research And Clinical Oncology; 8-2020; 1-15
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