Abstract
WHO classification of tumors of the central nervous system (CNS) is the standard basis for brain cancer diagnosis. It is primarily based on histopathological findings and some parameters such as frequency of mitotic malignant cells and existence of necrosis, providing a guideline for treatments of patients. Gliomas, the most frequently occurring brain tumor group, are particularly heterogeneous, showing a variety of cellular morphologies, molecular aberrations, and biological behavior. This fact has driven intensive investigations on searching for biomarkers for better stratification of gliomas and has resulted in the discovery of specific expression of the leucine-rich repeat-containing G-protein-coupled receptor 5 (LGR5) in multiple adult tissue stem cells. This is particularly relevant, as tumors with a low level of differentiation are associated with especially poor prognosis. Although inadequate choices of therapeutics for glioma patients currently make biomarkers’ utility for glioma patients limited, recent advances are shedding light not only on the heterogeneity of glioma tumors within and across the subtypes, but also on the heterogeneity between malignant cells within the individual tumors.
Abbreviations
- AP1:
-
Activator Protein 1
- ChIP:
-
Chromatin Immunoprecipitation
- CIC:
-
Capicua Transcriptional Repressor
- CNS:
-
Central Nervous System
- EMSA:
-
Electrophoretic Mobility Shift Assay
- EPHA2:
-
Ephrin Type-A Receptor 2
- G-CIMP:
-
Glioma-CpG Island Methylator Phenotype
- GSC:
-
Glioblastoma Stem Cell
- IDH:
-
Isocitrate Dehydrogenase
- L1CAM:
-
L1 Cell Adhesion Molecule
- LGR5:
-
Leucine-Rich Repeat-Containing G-Protein-Coupled Receptor 5
- LHX2:
-
LIM Homeobox 2
- LOH:
-
Loss of Heterozygosity
- MAPK:
-
Mitogen-Activated Protein Kinase
- MGMT:
-
O6-Methylguanine-DNA Methyltransferase
- PFKFB4:
-
Fructose-2,6-biphosphatase 4
- PFS:
-
Progression-Free Survival
- RB:
-
Retinoblastoma
- RNAi:
-
RNA Interference
- WHO:
-
World Health Organization
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Nakata, S., Phillips, E., Goidts, V. (2015). LGR5 as Marker in Brain Cancer. In: Preedy, V., Patel, V. (eds) Biomarkers in Cancer. Biomarkers in Disease: Methods, Discoveries and Applications. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7681-4_11
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