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Present and potential future adjuvant issues in high-grade astrocytic glioma treatment.

作者信息

Lefranc F, Rynkowski M, DeWitte O, Kiss R

机构信息

Department of Neurosurgery, Erasme University Hospital, Free University of Brussels, Brussels, Belgium.

出版信息

Adv Tech Stand Neurosurg. 2009;34:3-35. doi: 10.1007/978-3-211-78741-0_1.


DOI:10.1007/978-3-211-78741-0_1
PMID:19368079
Abstract

Despite major advances in the management of malignant gliomas of which glioblastomas represent the ultimate grade of malignancy, they remain characterized by dismal prognoses. Glioblastoma patients have a median survival expectancy of only 14 months on the current standard treatment of surgical resection to the extent feasible, followed by adjuvant radiotherapy plus temozolomide, given concomitantly with and after radiotherapy. Malignant gliomas are associated with such dismal prognoses because glioma cells can actively migrate through the narrow extra-cellular spaces in the brain, often travelling relatively long distances, making them elusive targets for effective surgical management. Clinical and experimental data have demonstrated that invasive malignant glioma cells show a decrease in their proliferation rates and a relative resistance to apoptosis (type I programmed cell death) as compared to the highly cellular centre of the tumor, and this may contribute to their resistance to conventional pro-apoptotic chemotherapy and radiotherapy. Resistance to apoptosis results from changes at the genomic, transcriptional and post-transcriptional level of proteins, protein kinases and their transcriptional factor effectors. The PTEN/ PI3K/Akt/mTOR/NF-kappaB and the Ras/Raf/MEK/ERK signaling cascades play critical roles in the regulation of gene expression and prevention of apoptosis. Components of these pathways are mutated or aberrantly expressed in human cancer, notably glioblastomas. Monoclonal antibodies and low molecular-weight kinase inhibitors of these pathways are the most common classes of agents in targeted cancer treatment. However, most clinical trials of these agents as monotherapies have failed to demonstrate survival benefit. Despite resistance to apoptosis being closely linked to tumorigenesis, tumor cells can still be induced to die by non-apoptotic mechanisms such as necrosis, senescence, autophagy (type II programmed cell death) and mitotic catastrophe. Temozolomide brings significant therapeutic benefits in glioblastoma treatment. Part of temozolomide cytotoxic activity is exerted through pro-autophagic processes and also through the induction of late apoptosis. Autophagy, type II programmed cell death, represents an alternative mechanism to overcome, at least partly, the dramatic resistance of many cancers to pro-apoptotic-related therapies. Another way to potentially overcome apoptosis resistance is to decrease the migration of malignant glioma cells in the brain, which then should restore a level of sensitivity to pro-apoptotic drugs. Recent series of studies have supported the concept that malignant gliomas might be seen as an orchestration of cross-talks between cancer cells, microenvironment, vasculature and cancer stem cells. The present chapter focuses on (i) the major signaling pathways making glioblastomas resistant to apoptosis, (ii) the signaling pathways distinctly activated by pro-autophagic drugs as compared to pro-apoptotic ones, (iii) autophagic cell death as an alternative to combat malignant gliomas, (iv) the major scientific data already obtained by researchers to prove that temozolomide is actually a pro-autophagic and pro-apoptotic drug, (v) the molecular and cellular therapies and local drug delivery which could be used to complement conventional treatments, and a review of some of the currently ongoing clinical trials, (vi) the fact that reducing the levels of malignant glioma cell motility can restore pro-apoptotic drug sensitivity, (vii) the observation that inhibiting the sodium pump activity reduces both glioma cell proliferation and migration, (viii) the brain tumor stem cells as a target to complement conventional treatment.

摘要

相似文献

[1]
Present and potential future adjuvant issues in high-grade astrocytic glioma treatment.

Adv Tech Stand Neurosurg. 2009

[2]
[The sodium pump could constitute a new target to combat glioblastomas].

Bull Cancer. 2008-3

[3]
[Glioblastomas are resistant to apoptosis but less resistant to the autophagic process].

Bull Mem Acad R Med Belg. 2007

[4]
Roles of the RAF/MEK/ERK and PI3K/PTEN/AKT pathways in malignant transformation and drug resistance.

Adv Enzyme Regul. 2006

[5]
Embryonic stem cell (ESC)-mediated transgene delivery induces growth suppression, apoptosis and radiosensitization, and overcomes temozolomide resistance in malignant gliomas.

Cancer Gene Ther. 2010-6-4

[6]
Editorial: on the road to multi-modal and pluri-disciplinary treatment of glioblastomas.

Acta Neurochir (Wien). 2009-2

[7]
The role of autophagy in sensitizing malignant glioma cells to radiation therapy.

Acta Biochim Biophys Sin (Shanghai). 2009-5

[8]
Proautophagic drugs: a novel means to combat apoptosis-resistant cancers, with a special emphasis on glioblastomas.

Oncologist. 2007-12

[9]
Possible future issues in the treatment of glioblastomas: special emphasis on cell migration and the resistance of migrating glioblastoma cells to apoptosis.

J Clin Oncol. 2005-4-1

[10]
Suppression of RAF/MEK or PI3K synergizes cytotoxicity of receptor tyrosine kinase inhibitors in glioma tumor-initiating cells.

J Transl Med. 2016-2-9

引用本文的文献

[1]
The mitochondrial protein YME1 Like 1 is important for non-small cell lung cancer cell growth.

Int J Biol Sci. 2023

[2]
Overexpression of RAB34 associates with tumor aggressiveness and immune infiltration in glioma.

Biosci Rep. 2022-10-28

[3]
In search of effective therapies to overcome resistance to Temozolomide in brain tumours.

Cancer Drug Resist. 2019-12-19

[4]
The therapeutic value of XL388 in human glioma cells.

Aging (Albany NY). 2020-11-6

[5]
Long noncoding RNA DANCR knockdown inhibits proliferation, migration and invasion of glioma by regulating miR-135a-5p/BMI1.

Cancer Cell Int. 2020-2-18

[6]
Ninjurin2 overexpression promotes glioma cell growth.

Aging (Albany NY). 2019-12-2

[7]
Role of linc00174/miR-138-5p (miR-150-5p)/FOSL2 Feedback Loop on Regulating the Blood-Tumor Barrier Permeability.

Mol Ther Nucleic Acids. 2019-12-6

[8]
AEBP1 down regulation induced cell death pathway depends on PTEN status of glioma cells.

Sci Rep. 2019-10-10

[9]
Mifepristone Overcomes Tumor Resistance to Temozolomide Associated with DNA Damage Repair and Apoptosis in an Orthotopic Model of Glioblastoma.

Cancers (Basel). 2018-12-22

[10]
Tamoxifen overrides autophagy inhibition in Beclin-1-deficient glioma cells and their resistance to adenovirus-mediated oncolysis via upregulation of PUMA and BAX.

Oncogene. 2018-7-10

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