Glioblastoma 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-Fos-NA to cultured T98G cells hampers the interaction between c-Fos and PI4K2A, an enzyme activated by c-Fos. Moreover, it was observed a decrease in tumor cell proliferation rates in vitro and a reduction in tumor growth in vivo when a U87-MG-generated xenograft on nude mice is intratumorally treated with recombinant c-Fos-NA. Importantly, a smaller peptide of 92 amino acids derived from c-Fos-NA retains the capacity to interfere with tumor proliferation in vitro and in vivo. Taken together, these results support the use of the N-terminal portion of c-Fos, or shorter derivatives as a novel therapeutic strategy for the treatment of glioblastoma multiforme.
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December 2020
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The cover image shows a word cloud based on the findings of the review article by Fulcher and Sapkota (pp. 4397–4423) in this issue, depicting the many biological functions and modes of regulation of the CK1 family of Ser/Thr protein kinases. Image created by Luke Fulcher.
Research Article|
December 11 2020
Impairing activation of phospholipid synthesis by c-Fos interferes with glioblastoma cell proliferation
César G. Prucca;
César G. Prucca
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Ana C. Racca;
Ana C. Racca
*
Data curation, Formal analysis, Investigation, Writing - original draft, Writing - review & editing
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Fabiola N. Velazquez;
Fabiola N. Velazquez
†
Data curation, Formal analysis, Investigation, Writing - review & editing
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Andrés M. Cardozo Gizzi;
Andrés M. Cardozo Gizzi
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Lucia Rodríguez Berdini;
Lucia Rodríguez Berdini
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Beatriz L. Caputto
Conceptualization, Resources, Supervision, Funding acquisition, Writing - original draft, Project administration, Writing - review & editing
CIQUIBIC (CONICET), Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
Correspondence: Beatriz L. Caputto (bcaputto@fcq.unc.edu.ar)
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Biochem J (2020) 477 (23): 4675–4688.
Article history
Received:
June 15 2020
Revision Received:
November 11 2020
Accepted:
November 19 2020
Accepted Manuscript online:
November 19 2020
Citation
César G. Prucca, Ana C. Racca, Fabiola N. Velazquez, Andrés M. Cardozo Gizzi, Lucia Rodríguez Berdini, Beatriz L. Caputto; Impairing activation of phospholipid synthesis by c-Fos interferes with glioblastoma cell proliferation. Biochem J 11 December 2020; 477 (23): 4675–4688. doi: https://doi.org/10.1042/BCJ20200465
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