Subventricular zone involvement in Glioblastoma - A proteomic evaluation and clinicoradiological correlation

Sci Rep. 2017 May 3;7(1):1449. doi: 10.1038/s41598-017-01202-8.

Abstract

Glioblastoma multiforme (GBM), the most malignant of all gliomas is characterized by a high degree of heterogeneity and poor response to treatment. The sub-ventricular zone (SVZ) is the major site of neurogenesis in the brain and is rich in neural stem cells. Based on the proximity of the GBM tumors to the SVZ, the tumors can be further classified into SVZ+ and SVZ-. The tumors located in close contact with the SVZ are classified as SVZ+, while the tumors located distantly from the SVZ are classified as SVZ-. To gain an insight into the increased aggressiveness of SVZ+ over SVZ- tumors, we have used proteomics techniques like 2D-DIGE and LC-MS/MS to investigate any possible proteomic differences between the two subtypes. Serum proteomic analysis revealed significant alterations of various acute phase proteins and lipid carrying proteins, while tissue proteomic analysis revealed significant alterations in cytoskeletal, lipid binding, chaperone and cell cycle regulating proteins, which are already known to be associated with disease pathobiology. These findings provide cues to molecular basis behind increased aggressiveness of SVZ+ GBM tumors over SVZ- GBM tumors and plausible therapeutic targets to improve treatment modalities for these highly invasive tumors.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acute-Phase Proteins / genetics*
  • Acute-Phase Proteins / metabolism
  • Brain Neoplasms / genetics*
  • Brain Neoplasms / metabolism
  • Brain Neoplasms / pathology
  • Brain Neoplasms / surgery
  • Carrier Proteins / genetics
  • Carrier Proteins / metabolism
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism
  • Cytoskeletal Proteins / genetics
  • Cytoskeletal Proteins / metabolism
  • Gene Expression Profiling
  • Glioblastoma / genetics*
  • Glioblastoma / metabolism
  • Glioblastoma / pathology
  • Glioblastoma / surgery
  • Humans
  • Lateral Ventricles / metabolism*
  • Lateral Ventricles / pathology
  • Lateral Ventricles / surgery
  • Molecular Sequence Annotation
  • Neoplasm Proteins / genetics*
  • Neoplasm Proteins / metabolism
  • Neoplastic Stem Cells / metabolism
  • Neoplastic Stem Cells / pathology
  • Neural Stem Cells / metabolism
  • Neural Stem Cells / pathology
  • Neurogenesis / genetics
  • Proteome / genetics*
  • Proteome / metabolism

Substances

  • Acute-Phase Proteins
  • Carrier Proteins
  • Cell Cycle Proteins
  • Cytoskeletal Proteins
  • Neoplasm Proteins
  • Proteome
  • lipid transfer protein