Preparation and Culture of Organotypic Hippocampal Slices for the Analysis of Brain Metastasis and Primary Brain Tumor Growth

AbstractGuanylate binding proteins (GBPs), a family of interferon-inducible large GTPase, play a pivotal role in cell-autonomous immunity and tumor malignant transformation. Glioblastoma (GBM) is the most prevalent and lethal primary brain tumor in adults. Here we show that GBP5 was highly expressed in GBM cell lines and in clinical samples, especially in the mesenchymal subtype. The expression levels of GBP5 were negatively correlated with the prognosis of GBM patients. Overexpression of GBP5 promoted the proliferation, migration, and invasion of GBM cells in vitro and in vivo. In contrast, silencing GBP5 by RNA interference exhibited the opposite effects. Consequently, targeting GBP5 in GBM cells resulted in impaired tumor growth and prolonged survival time of mice with GBM tumors. We further identified that the Src/ERK1/2/MMP3 axis was essential for GBP5-promoted GBM aggressiveness. These findings suggest that GBP5 may represent a novel target for GBM intervention.

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CSIG-03. GBP5 DRIVES MALIGNANCY OF GLIOBLASTOMA

Neuro-Oncology ◽

10.1093/neuonc/noab196.129 ◽

2021 ◽

Vol 23 (Supplement_6) ◽

pp. vi33-vi33

Author(s):

Ming Li ◽

Clark Chen

Keyword(s):

Brain Tumor ◽

Rna Interference ◽

Tumor Growth ◽

Survival Time ◽

Primary Brain Tumor ◽

Migration And Invasion ◽

Clinical Samples ◽

Novel Target

Abstract Guanylate binding proteins (GBPs), a family of interferon-inducible large GTPase, play a pivotal role in cell-autonomous immunity and tumor malignant transformation. Glioblastoma (GBM) is the most prevalent and lethal primary brain tumor in adults. Here we show that GBP5 was highly expressed in GBM cell lines and in clinical samples, especially in the mesenchymal subtype. The expression levels of GBP5 were negatively correlated with the prognosis of GBM patients. Overexpression of GBP5 promoted the proliferation, migration, and invasion of GBM cells in vitro and in vivo. In contrast, silencing GBP5 by RNA interference exhibited the opposite effects. Consequently, targeting GBP5 in GBM cells resulted in impaired tumor growth and prolonged survival time of mice with GBM tumors. We further identified that the Src/ERK1/2/MMP3 axis was essential for GBP5-promoted GBM aggressiveness. These findings suggest that GBP5 may represent a novel target for GBM intervention.

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Early Detection of NF1 Brain Tumor Growth and Treatment Response by MRI, MRS and PET in a Trial of Novel Antitumor Drugs

10.21236/ada376214 ◽

1997 ◽

Author(s):

Peter C. Phillips

Keyword(s):

Brain Tumor ◽

Early Detection ◽

Tumor Growth ◽

Treatment Response ◽

Antitumor Drugs

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Roles of nitric oxide and polyamines in brain tumor growth

Advances in Medical Sciences ◽

10.1016/j.advms.2021.02.006 ◽

2021 ◽

Vol 66 (1) ◽

pp. 199-205

Author(s):

Monika Szeliga ◽

Jan Albrecht

Keyword(s):

Nitric Oxide ◽

Brain Tumor ◽

Tumor Growth

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Friend or Foe: Paradoxical Roles of Autophagy in Gliomagenesis

Cells ◽

10.3390/cells10061411 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1411

Author(s):

Don Carlo Ramos Batara ◽

Moon-Chang Choi ◽

Hyeon-Uk Shin ◽

Hyunggee Kim ◽

Sung-Hak Kim

Keyword(s):

Brain Tumor ◽

Glioblastoma Multiforme ◽

Cancer Biology ◽

Molecular Mechanisms ◽

Primary Brain Tumor ◽

Molecular Target ◽

Therapeutic Strategies ◽

Homeostatic Mechanism ◽

Cellular Context ◽

Cellular Components

Glioblastoma multiforme (GBM) is the most common and aggressive type of primary brain tumor in adults, with a poor median survival of approximately 15 months after diagnosis. Despite several decades of intensive research on its cancer biology, treatment for GBM remains a challenge. Autophagy, a fundamental homeostatic mechanism, is responsible for degrading and recycling damaged or defective cellular components. It plays a paradoxical role in GBM by either promoting or suppressing tumor growth depending on the cellular context. A thorough understanding of autophagy’s pleiotropic roles is needed to develop potential therapeutic strategies for GBM. In this paper, we discussed molecular mechanisms and biphasic functions of autophagy in gliomagenesis. We also provided a summary of treatments for GBM, emphasizing the importance of autophagy as a promising molecular target for treating GBM.

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Molecular Mechanisms of Drug Resistance in Glioblastoma

International Journal of Molecular Sciences ◽

10.3390/ijms22126385 ◽

2021 ◽

Vol 22 (12) ◽

pp. 6385

Author(s):

Maya A. Dymova ◽

Elena V. Kuligina ◽

Vladimir A. Richter

Keyword(s):

Drug Resistance ◽

Brain Tumor ◽

Molecular Mechanisms ◽

Primary Brain Tumor ◽

Therapeutic Resistance ◽

Molecular Characteristics ◽

Blood Brain ◽

Conventional Radiation ◽

The Brain ◽

Made In

Glioblastoma multiforme (GBM) is the most common and fatal primary brain tumor, is highly resistant to conventional radiation and chemotherapy, and is not amenable to effective surgical resection. The present review summarizes recent advances in our understanding of the molecular mechanisms of therapeutic resistance of GBM to already known drugs, the molecular characteristics of glioblastoma cells, and the barriers in the brain that underlie drug resistance. We also discuss the progress that has been made in the development of new targeted drugs for glioblastoma, as well as advances in drug delivery across the blood–brain barrier (BBB) and blood–brain tumor barrier (BBTB).

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