RT Conference Proceedings
T1 Sensitivity of polyamine metabolism to glucose deprivation is increased in neuroblastoma cells with N-myc amplification
A1 Ruiz-Pérez, M. Victoria
A1 Urdiales-Ruiz, José Luis
A1 Sánchez-Jiménez, Francisca María
A1 Medina-Torres, Miguel Ángel
K1 Neuroblastoma
K1 Poliaminas - Metabolismo
AB Ornithine-derived polyamines are essential for cell proliferation, and their levels are elevated in many human tumors. Neuroblastoma, the most frequent extra-cranial solid tumor in children, harbors amplification of n-myc oncogene (which enhances polyamine metabolism) in 25% of the cases. In the present communication, the relevance of n-myc amplification in several metabolic features of human neuroblastoma cell lines is studied. A previously unknown linkage between glycolysis impairment and polyamine reduction, related to n-myc amplification, is unveiled. Results show that glycolysis inhibition is able to trigger signaling events leading to the reduction of N-Myc protein levels and subsequent decrease of both ornithine decarboxylase expression and polyamine levels, accompanied by cell cycle blockade preceding cell death.  Metabolism-targeted therapies are emerging as new approaches for cancer treatment. New anti-tumor strategies could take advantage of the direct relationship between glucose deprivation and PA metabolism impairment leading to cell death described in the present work, and its apparent dependence on n-myc amplification in the case of neuroblastoma. Combined therapies targeting glucose metabolism and polyamine synthesis could be effective in the treatment of n-myc amplified tumors.
YR 2014
FD 2014-07-10
LK http://hdl.handle.net/10630/7802
UL http://hdl.handle.net/10630/7802
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.                      This work has been funded by Grants SAF2011-26518 (Ministerio de Economía y Competitividad, Spain), Excellence Projects CTS-1507 and CVI-06585 (Junta de Andalucía, Spain) and BIO-267 (fondos PAIDI, Junta de Andalucía, Spain). MVRP was the recipient of a FPU long-term fellowship  (Ministerio de Educación, Cultura y Deporte, Spain) and a “III Plan Propio de Investigación” short-term fellowship (University of Málaga). CIBERER is an initiative of Instituto de Salud Carlos III. This communication has the support of a travel grant "Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech".
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026