The role of extracellular vesicles in the diagnosis of glioblastoma progression

Abstract

The article reviews studies highlighting the role of extracellular molecules in non-invasive diagnosis of glioblastoma recurrence. Glioblastoma is the most common malignant tumor of the brain characterized by fatal outcome prognosis. Current treatment of tumor recurrence allows to increase patient survival, improve functional outcome and decrease caregivers» load. The standard method of recurrence diagnosis is neuroimaging which at early stages cannot distinguish between tumor recurrence and post-radiation changes. Currently in oncology, liquid biopsy and marker detection in circulating extracellular vesicles are considered promising approaches allowing to obtain early and differential tumor diagnosis, determine dynamic molecular and genetic status of the tumor, diagnose tumor recurrence at early stages. In this context, the most promising approach to glioblastoma diagnosis is associated with studying of expression of glial fibrillary acidic protein (GFAP), epidermal growth factor receptor (EGFR), its mutant variant EGFRvIII, podoplanin (PDPN) and isocitrate dehydrogenase 1 (IDH1) in extracellular vesicles; for primary glioblastoma diagnosis and early recurrence: studying of microRNA-210, -301a, -222, -123-3p, -21; for control of immunotherapy effectiveness in patients with recurrent forms of glioblastoma after standard treatment: evaluation of СD9+ / GFAP+ / survivin+ exosomes in plasma.