A proteomic approach of pediatric astrocytomas: MiRNAs and network insight

• Published in: Journal of proteomics 2013-12, Vol.94, p.162-175
• Main Authors: Ruiz Esparza-Garrido, Ruth, Velázquez-Flores, Miguel Á., Diegopérez-Ramírez, Jaime, López-Aguilar, Enrique, Siordia-Reyes, Georgina, Hernández-Ortiz, Magdalena, Martínez-Batallar, Ángel G., Encarnación-Guevara, Sergio, Salamanca-Gómez, Fabio, Arenas-Aranda, Diego Julio
• Format: Article
• Language: English
• Subjects: adults; biomarkers; calreticulin; central nervous system; children; death; drugs; Hub proteins; mass spectrometry; microRNA; mortality; neoplasms; Novel miRNAs; patients; Pediatric astrocytoma; polyacrylamide gel electrophoresis; polymerase chain reaction; prediction; Protein–protein interactions; Proteomic; proteomics; vimentin
• ISSN: 1874-3919
• DOI: 10.1016/j.jprot.2013.09.009

Pediatric astrocytomas, a leading cause of death associated with cancer, are the most common primary central nervous system tumors found in children. Most studies of these tumors focus on adults, not on children. We examined the global protein and microRNA expression pattern by 2D SDS-PAGE, mass spectrometry (MALDI-TOF), and RT2 miRNA PCR Array System. Proteomic studies revealed 49 proteins with changes on the expression. Interactome showed that vimentin, calreticulin, and 14-3-3 epsilon protein are hub proteins in these neoplasms. MicroRNA analyses demonstrated for the first time novel microRNAs involved in the astrocytoma biology. In conclusion, our results show that novel proteins and microRNAs with expression changes on pediatric astrocytoma could serve as biomarkers of tumor progression. Astrocytomas are tumors that progress rapidly and that invade surrounding tissues. Although some drugs have been developed to treat these neoplasms, the mortality of patients is still very high. In this study, we describe for the first time, to our knowledge, some proteins and miRNAs associated with the biology of astrocytic tumors that could be postulated as possible diagnostic or prognostic biomarkers. Altogether, our results indicate that large-scale analyses allow making a fairly accurate prediction of different cellular processes altered in astrocytic tumors. [Display omitted] •Forty nine proteins with expression changes in pediatric astrocytomas are reported.•Calreticulin, vimentin, and 1433 epsilon protein are possible hub proteins.•Novel microRNAs, involved in astrocytoma biology, are revealed for the first time.•Altered proteins and microRNAs are involved in the same signaling pathways.•Some protein changes appear to correlate with microRNA alteration.