Impairing activation of phospholipid synthesis by c-Fos interferes with glioblastoma cell proliferation

PRUCCA, CÉSAR GERMÁN; RACCA, ANA CRISTINA; VELAZQUEZ, FABIOLA; CARDOZO-GIZZI, ANDRÉS M.; RODRIGUEZ-BERDINI, LUCÍA; CAPUTTO, BEATRIZ LEONOR

BIOCHEMICAL JOURNAL

PORTLAND PRESS LTD

Lugar: Londres; Año: 2020

0264-6021

lioblastoma multiforme is the most aggressive type of tumor of the CNS with an overall survival rate of approximately one year. Since this rate has not changed significantly over the last 20 years, the development of new therapeutic strategies for the treatment of these tumors is peremptory. The over-expression of the proto-oncogene c-Fos has been observed in several CNS tumors including glioblastoma multiforme and is usually associated with a poor prognosis. Besides its genomic activity as an AP-1 transcription factor, this protein can also activate phospholipid synthesis by a direct interaction with key enzymes of their metabolic pathways. Given that the amino-terminal portion of c-Fos (c-Fos-NA: amino acids 1-138) associates to but does not activate phospholipid synthesizing enzymes, we evaluated if c-Fos-NA or some shorter derivatives are capable of acting as dominant-negative peptides of the activating capacity of c-Fos. The over-expression or the exogenous administration of c-Fo