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J Proteomics. 2013 Dec 6;94:162-75. doi: 10.1016/j.jprot.2013.09.009. Epub 2013 Sep 20.

A proteomic approach of pediatric astrocytomas: MiRNAs and network insight.

Author information

1
Unidad de Investigación Médica en Genética Humana, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, IMSS, 06720 México, D.F., Mexico; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04510 Coyoacán, D. F., Mexico.

Abstract

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 RT(2) 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.

BIOLOGICAL SIGNIFICANCE:

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.

KEYWORDS:

Hub proteins; Novel miRNAs; Pediatric astrocytoma; Protein–protein interactions; Proteomic

PMID:
24060999
DOI:
10.1016/j.jprot.2013.09.009
[Indexed for MEDLINE]

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