Abstract:
:The microvasculature of brain tumors has been proposed as the primary target for ionizing radiation (IR)-induced apoptosis. However, the contribution of low dose IR-induced non-apoptotic cell death pathways has not been investigated. This study aimed to characterize the effect of IR on human brain microvascular endothelial cells (HBMEC) and to assess the combined effect of epigallocatechin-3-gallate (EGCg), a green tea-derived anti-angiogenic molecule. HBMEC were treated with EGCg, irradiated with a sublethal (< or =10 Gy) single dose. Cell survival was assessed 48 h later by nuclear cell counting and Trypan blue exclusion methods. Cell cycle distribution and DNA fragmentation were evaluated by flow cytometry (FC), cell death was assessed by fluorimetric caspase-3 activity, FC and immunoblotting for pro-apoptotic proteins. While low IR doses alone reduced cell survival by 30%, IR treatment was found more effective in EGCg pretreated-cells reaching 70% cell death. Analysis of cell cycle revealed that IR-induced cell accumulation in G2-phase. Expression of cyclin-dependent kinase inhibitors p21(CIP/Waf1) and p27(Kip) were increased by EGCg and IR. Although random DNA fragmentation increased by approximately 40% following combined EGCg/IR treatments, the synergistic reduction of cell survival was not related to increased pro-apoptotic caspase-3, caspase-9 and cytochrome C proteins. Cell necrosis increased 5-fold following combined EGCg/IR treatments while no changes in early or late apoptosis were observed. Our results suggest that the synergistic effects of combined EGCg/IR treatments may be related to necrosis, a non-apoptotic cell death pathway. Strategies sensitizing brain tumor-derived EC to IR may enhance the efficacy of radiotherapy and EGCg may represent such a potential agent.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
McLaughlin N,Annabi B,Lachambre MP,Kim KS,Bahary JP,Moumdjian R,Béliveau Rdoi
10.1007/s11060-006-9171-8subject
Has Abstractpub_date
2006-11-01 00:00:00pages
111-21issue
2eissn
0167-594Xissn
1573-7373journal_volume
80pub_type
杂志文章abstract::The effect of recombinant human interleukin 1 beta (rHuIL-1 beta) on myelosuppression induced by 3-[(4-amino-2-methyl-5-pyrimidynyl)methyl]-1-(2-chloroethyl)-1-nit rosourea hydrochloride (ACNU) was studied. In in vivo study using BALB/c mice, pretreatment with 1 microgram/mouse of rHuIL-1 beta as a single intraperiton...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00177620
更新日期:1992-10-01 00:00:00
abstract::Aneurysmal bone cysts (ABCs) are benign bone lesions with annual incidences ranging from 1.4 to 3.2 cases per million people. Approximately, 10-30% of ABCs are found in the spine. Such lesions are traditionally treated with curettage or other intralesional techniques. Because ABCs can be locally aggressive, intralesio...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,多中心研究
doi:10.1007/s11060-014-1540-0
更新日期:2014-10-01 00:00:00
abstract::Hot spot mutations in the promoter region of telomerase reverse transcriptase (TERT promoter mutations) occur frequently in tumors of neuroectodermal origin such as melanoma and glioma. Many of these tumors are of neuroectodermal or ectomesenchymal origin which is suggestive of TERT promoter mutations playing a role i...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-014-1553-8
更新日期:2014-11-01 00:00:00
abstract:OBJECTIVES:To study the metabolic effects in vivo of L-2, 4 diaminobutyric acid (DAB) administered by retrograde microdialysis in glioblastoma and to evaluate the feasibility of the technique. METHODS:In 10 patients with glioblastoma, a stereotactic biopsy was performed followed by implantation of microdialysis cathet...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1007/s11060-006-9186-1
更新日期:2006-12-01 00:00:00
abstract::Ependymomas (EPN) show site specific genetic alterations and a recent DNA methylation profiling study identified nine molecular subgroups. C11orf95-RELA and YAP1 fusions characterise the RELA and YAP1 molecular subgroups, respectively, of supratentorial (ST)-EPNs. Current guidelines recommend molecular subgrouping ove...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-2767-y
更新日期:2018-05-01 00:00:00
abstract:INTRODUCTION:Glioblastoma (GBM) is the most common primary brain cancer. The average survival time for the majority of patients is approximately 15 months after diagnosis. A major feature of GBM that contributes to its poor prognosis is its high invasiveness. Caveolae are plasma membrane subdomains that participate in ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-019-03161-8
更新日期:2019-06-01 00:00:00
abstract::We have expressed the tumor suppressor p16 under the control of a tetracycline-sensitive promoter in two human glioblastoma cell lines which do not contain endogenous p16. Ectopic p16 expression led to a stable but reversible G1 phase cell cycle arrest, reduced the growth of both cell lines in cell culture, and almost...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1020226130478
更新日期:2002-10-01 00:00:00
abstract:BACKGROUND:Tumor treating fields (TTFields) are anti-mitotic, non-invasive loco-regional cancer therapy comprising low intensity, intermediate frequency alternating electric fields. TTFields plus Temozolomide (TTFields/TMZ) extended survival versus TMZ alone in newly diagnosed glioblastoma (GBM) patients in the EF-14 t...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s11060-019-03361-2
更新日期:2020-02-01 00:00:00
abstract::The toxicity of IL-2 and/or C. Parvum when injected directly into the mouse brain was examined by survival and histopathology using different numbers of injections, different doses of IL-2, different solvents for the IL-2, and different doses and routes of administration of C. Parvum. Two injections was found signific...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00172920
更新日期:1989-09-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2574-x
更新日期:2017-11-01 00:00:00
abstract::The high incidence of gliomas in Li-Fraumeni families and the high frequency of somatic p53 mutations in sporadic glial tumors have raised the possibility that germline p53 mutations could play an important role in familial aggregation of gliomas. In the present study, 18 families with two or more gliomas were screene...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1013890022041
更新日期:2001-12-01 00:00:00
abstract::The relationship between coagulation cascade activation and glioma cell proliferation was examined. The human glioma cell lines T98G, TM-1 and normal human astrocyte cell strain (NHA) were examined. Using anti-tissue factor (TF) antibody, immunocytochemical detection of TF antigen was obtained in both cell lines and c...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1006323200001
更新日期:2000-01-01 00:00:00
abstract::Membrane-type MMPs (MT-MMPs) constitute a growing subclass of recently identified matrix metalloproteinases (MMPs). In addition to the highly conserved MMP functional domains, the MT-MMPs have additional insertion sequences (IS) that confer unique functional roles. While most of the MMPs are secreted, the MT-MMPs are ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1023/a:1012213604731
更新日期:2001-06-01 00:00:00
abstract::To cast light on the mechanisms of drug-resistance, experimental brain tumors were immunohistochemically evaluated for expression of glutathione S-transferase (GST)-alpha, mu, pi, p-glycoprotein and apoptosis-related factors, such as bcl-2 and p53, as well as by the terminal deoxynucleotidyl transferase-mediated dUTP-...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1005878402133
更新日期:1998-01-01 00:00:00
abstract:BACKGROUND:The role of immunotherapy for metastatic melanoma has expanded over the past decade triggering questions regarding the combination and timing of immunotherapy and radiation for brain metastases. We used the National Cancer Database (NCDB) to see if the time from radiation to immunotherapy in patients with me...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-020-03663-w
更新日期:2021-01-11 00:00:00
abstract::Meningiomas, when benign, are commonly treated with surgical resection alone. However, the optimal treatment for patients with subtotally resected or recurrent World Health Organization (WHO) grade I tumors, or WHO grade II and III tumors, regardless of the extent of resection, is not well defined, with both a paucity...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-010-0375-6
更新日期:2010-09-01 00:00:00
abstract::Subcutaneous vaccination using granulocyte-macrophage colony-stimulating factor (GM-CSF)-transduced glioma cells substantially prolongs survival in the mouse GL261 glioma model. To potentiate the efficacy of GM-CSF-based vaccination, syngeneic C57BL/6 mice bearing pre-implanted intracerebral GL261 gliomas were vaccina...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000013497.04322.fc
更新日期:2004-01-01 00:00:00
abstract::Surgical excision of brain tumors provides a means of cytoreduction and diagnosis while minimizing neurologic deficit and improving overall survival. Despite advances in functional and three-dimensional stereotactic navigation and intraoperative magnetic resonance imaging, delineating tissue in real time with physiolo...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-016-2223-9
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abstract::Intracranial metastatic prostate carcinoma is rare. We sought to determine the clinical outcomes after Gamma Knife stereotactic radiosurgery (GKSRS) for patients with intracranial prostate carcinoma metastases. We studied data from 10 patients who underwent radiosurgery for 15 intracranial metastases (9 dural-based an...
journal_title:Journal of neuro-oncology
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doi:10.1007/s11060-009-9966-5
更新日期:2010-02-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-009-9961-x
更新日期:2010-01-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-2788-6
更新日期:2018-05-01 00:00:00
abstract::Glioma is the most common primary brain tumor in adults. Six3 is a human homologue of the highly conserved sine oculis gene family and essential transcription regulatory factor in process of eye and fetal forebrain development. However, little is known about the role of Six3 in human tumorigenesis. The aim of this stu...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2476-y
更新日期:2017-07-01 00:00:00
abstract::Stereotactic radiosurgery is a frequently performed procedure for patients with benign intracranial tumors. Benign tumors are good candidates for radiosurgery because they are generally non-invasive, are well visualized by magnetic resonance imaging, and their slow rate of proliferation makes conventional radiation do...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-009-9831-6
更新日期:2009-05-01 00:00:00
abstract::The frequency of the diagnosis of brain metastases has increased in recent years, probably due to an increased diagnostic sensitivity. Site predilection of brain lesions in oncological patients at the time of onset, may suggest mechanisms of brain-specific vulnerability to metastasis. The aim of the study is to determ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-012-0937-x
更新日期:2012-10-01 00:00:00
abstract::Twenty-eight patients with malignant brain tumors (16 with primary brain tumors and 12 with brain metastases) progressing after cranial irradiation with or without chemotherapy received varying doses of intracarotid VP-16. Courses of therapy were repeated every 4 weeks along with computerized axial tomography scan and...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00195611
更新日期:1987-01-01 00:00:00
abstract::We used double-label quantitative autoradiography to measure blood flow (with 131I-iodoantipyrine) and blood-to-tissue transport of 14C-alpha aminoisobutyric acid, AIB) in thirteen 9L gliosarcomas transplanted intracerebrally into Fischer-344 rats. Microscopically, the typical pattern of 9L tumor growth was observed: ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/BF00165526
更新日期:1991-12-01 00:00:00
abstract::The purpose of this study is to characterize the time course of N-isopropyl-p-[123I]-iodoamphetamine (123I-IMP) uptake of primary central nervous system lymphomas (PCNSL) comparing with those of other common brain tumors such as malignant gliomas and meningioma. Ten patients with PCNSL, 14 with malignant gliomas and 7...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1023/a:1022583610812
更新日期:2003-02-01 00:00:00
abstract::Malignancy involving the skull base remains a formidable management challenge. Advances and refinements in diagnostic imaging, instrumentation, microvascular reconstruction, and an improved overall appreciation of the anatomy of the skullbase have extended the boundaries of tumor resectability and in some cases, obvia...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1023/b:neon.0000041882.41369.9b
更新日期:2004-08-01 00:00:00
abstract::The classification of cartilaginous tumors of the skull base, including chondroid chordoma and chondrosarcoma remains the subject of controversy. Critical review of the literature and our own experience of chordomas and cartilaginous tumors of the skull base led to the following conclusions: 1) Chondrosarcoma of the s...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/BF01328954
更新日期:1994-01-01 00:00:00
abstract:OBJECT:Prophylactic cranial irradiation (PCI) is commonly offered to patients with limited stage primary small cell lung cancer following a complete response. METHODS:We present the unique case of a 76-year-old woman treated with PCI with a dose of 30 Gy in 15 fractions, at 200 cGy per fraction who developed progressi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-007-9384-5
更新日期:2007-10-01 00:00:00