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::Two patients with metastasis from lung carcinoma of the midbrain are presented. The computerized tomographic (CT) findings mimicked a primary pineal tumor, but autopsy confirmed a metastatic nodule in the midbrain in both cases. The rational approach to posterior third ventricular tumors seen on CT in adulthood is dis...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00165161
更新日期:1984-01-01 00:00:00
abstract::We have retrospectively reviewed toxicities and response of a cohort of primary central nervous system lymphoma (PCNSL) patients treated with high dose parenteral methotrexate (MTX) monotherapy without whole brain radiation. From The Massachusetts General Hospital (MGH) Cancer Registry, active since 1946, we selected ...
journal_title:Journal of neuro-oncology
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doi:10.1007/s11060-009-0090-3
更新日期:2010-07-01 00:00:00
abstract::NF1, NF2, and Schwannomatosis are incurable tumor suppressor syndromes associated with poor quality of life. The aim of this study was to determine the feasibility, acceptability, and preliminary efficacy of an NF adapted, 8-week group mind body skills based intervention, the relaxation response resiliency program (3R...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-014-1522-2
更新日期:2014-10-01 00:00:00
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journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF01052924
更新日期:1994-01-01 00:00:00
abstract::'Benign' brain tumors are a heterogeneous group of primary neoplasms representing 40% of primary brain tumors. Amongst neuroepithelial tumors, astrocytic neoplasms predominate, followed by oligodendroglial and mixed glial and glial-neuronal neoplasms. Less common are tumors of the ependyma, choroid plexus and neuroepi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1023/b:neon.0000041871.46785.53
更新日期:2004-08-01 00:00:00
abstract::This study investigated the effects of the intracarotid infusion of etoposide in combination with angiotensin II (AT II)-induced hypertension on the blood-brain barrier (BBB) and brain tissue in rats. Eighty rats were divided into five groups: Group 1, intravenous infusion of AT II to increase arterial blood pressure;...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00172760
更新日期:1992-06-01 00:00:00
abstract::Chemotherapy is often omitted in elderly patients with glioblastoma multiforme due to a fear of side effects. We applied metronomic chemotherapy with low-dose temozolomide and celecoxib (LD-TEM/CEL) during and after external beam radiotherapy (EBRT) and here report on how this regimen compares to standard temozolomide...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1834-x
更新日期:2015-09-01 00:00:00
abstract::This paper describes the pathobiology of some of the more common skull base tumors. In addition to clinicopathologic features, emphasis is placed upon methods of diagnosis utilizing immunoperoxidase stains and molecular markers that may or may not impact upon prognosis. ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/BF01053041
更新日期:1994-01-01 00:00:00
abstract::Although bevacizumab has not proven effective in adults with newly diagnosed high-grade gliomas (HGG), feasibility in newly diagnosed children with diffuse intrinsic pontine gliomas (DIPG) or HGG has not been reported in a prospective study. In a safety and feasibility study, children and young adults with newly diagn...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-2008-6
更新日期:2016-03-01 00:00:00
abstract::Central neurocytomas are uncommon intraventricular neoplasms whose optimal management remains controversial due to their rarity. We assessed outcomes for a historical cohort of neurocytoma patients and evaluated effects of tumor atypia, size, resection extent, and adjuvant radiotherapy. Progression-free survival (PFS)...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1959-y
更新日期:2016-01-01 00:00:00
abstract::Fibroblast growth factor-2 (FGF-2) is involved as an autocrine growth factor in the autonomous proliferation of glioma cells. To develop a new strategy for treating patients with glioma, we studied the effect on human glioma cells of a 16-mer oligopeptide with conformational similarity to the putative receptor-binding...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1023908307863
更新日期:2003-06-01 00:00:00
abstract::Embryonal tumors of the central nervous system (CNS) share histological features and were therefore initially grouped as primitive neuroectodermal tumors (PNET) and treated similarly. We sought to determine the relapse patterns of specific embryonal CNS tumors. We conducted a historical cohort study of children diagno...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,多中心研究
doi:10.1007/s11060-013-1213-4
更新日期:2013-11-01 00:00:00
abstract:BACKGROUND:Despite aspirations to achieve equality in healthcare we know that socioeconomic differences exist and may affect treatment and patient outcome, also in serious diseases such as cancer. We investigated disparities in neurosurgical care and outcome for patients with low-grade glioma (LGG). METHODS:In this na...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-019-03378-7
更新日期:2020-01-01 00:00:00
abstract::The aim of this investigation was to define characteristic properties of cellular energy metabolism in meningiomas in vitro dependent on the histological subtype. We analysed marker enzymes of representative metabolic pathways localized in the mitochondria (respiratory chain, citric acid cycle, beta-oxidation of fatty...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000003680.84840.52
更新日期:2003-11-01 00:00:00
abstract::Primary brain tumors cumulatively represent the most common solid tumors of childhood and are the leading cause of cancer related death in this age group. Traditionally, molecular findings and histological analyses from biopsies of resected tumor tissue have been used for diagnosis and classification of these diseases...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-014-1432-3
更新日期:2014-06-01 00:00:00
abstract::Thirty-one patients with metastatic brain tumors that either failed to respond or recurred after conventional therapy were treated by intra-arterial infusion of 100 mg/m2 of 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) into either a carotid or vertebral artery. Five patients (three with lung cancer, one with breast can...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00165605
更新日期:1983-01-01 00:00:00
abstract::Gamma Knife surgery (GKS) has emerged as a valuable adjuvant treatment modality for recurrent or residual craniopharyngioma. However, prognostic factors pertaining to progression-free survival (PFS) remain poorly understood. A study was conducted to address this issue. A total of 37 consecutive patients undergoing 39 ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-010-0494-0
更新日期:2011-08-01 00:00:00
abstract:OBJECTIVE:Malignant glioma is a lethal brain tumor with a low survival rate and poor prognosis. New strategies are urgently needed to augment the chemotherapeutic effects of temozolomide (TMZ), the standard drug in glioma treatment. Carnosic acid (CA) has been reported to have anticancer, antioxidant and anti-infectiou...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-03043-5
更新日期:2019-01-01 00:00:00
abstract::Tripartite motif (TRIM) proteins are involved in tumorigenesis. Here, we examined the expression, biological function, and clinical significance of tripartite motif containing 28 (TRIM28) in glioma, a locally aggressive brain tumor. First, TRIM28 expression was significantly higher in glioma (n = 138) than in non-glio...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1897-8
更新日期:2016-01-01 00:00:00
abstract:BACKGROUND:Lymphomatoid granulomatosis (LYG) is an angiocentric and angiodestructive lymphoreticular proliferation, which usually involves the lungs, but may also involve the central nervous system (CNS). Unique involvement of the CNS has been reported rarely. We report our experience with LYG confined to the brain and...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-009-9834-3
更新日期:2009-09-01 00:00:00
abstract:PURPOSE:To evaluate the effectiveness of complete resection and postoperative radiotherapy in spinal cord ependymomas. METHODS AND MATERIALS:We conducted a retrospective study over 20 patients (13 males and 7 females) with histologically confirmed spinal cord ependymomas between July 1985 and April 2001. Among them, 1...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-004-1386-y
更新日期:2005-01-01 00:00:00
abstract::Systemic high-dose methotrexate (HD-MTX) is the most effective chemotherapeutic agent in the treatment of primary central nervous system lymphoma (PCNSL). Leptomeningeal involvement is common and intrathecal methotrexate (IT-MTX) is frequently used in combination with HD-MTX, but its benefits are not established. Usin...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1016077907952
更新日期:2002-06-01 00:00:00
abstract::Treatment of recurrent primary CNS lymphoma (PCNSL) though not standardized most often utilizes whole brain radiotherapy, re-challenge with high-dose methotrexate, or administration of an alkylating chemotherapy. High-dose cytarabine (HD-araC) has been advocated as an active agent in PCNSL but limited information exis...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1994-8
更新日期:2016-02-01 00:00:00
abstract:BACKGROUND:Elevated serum alkaline phosphatase has been previously studied as a biomarker for progression of metastatic disease and implicated in adverse skeletal events and worsened survival. The purpose of this study was to determine if serum alkaline phosphatase was a predictor of short-term mortality of patients un...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-2947-9
更新日期:2018-10-01 00:00:00
abstract::Thermal stability signatures of complex molecule interaction in biological fluids can be measured using a new approach called differential scanning calorimetry (DSC). The thermal stability of plasma proteome has been described previously as a method of producing a disease-specific "signature," termed thermogram, in se...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-011-0630-5
更新日期:2011-12-01 00:00:00
abstract::This case study describes the long-term course of behavioral alterations and MRI findings in a patient with a combined limbic and cerebellar paraneoplastic syndrome, which was associated with a squamous lung carcinoma. Clinical equivalents were cerebellar ataxia, as well as severe anterograde memory loss, frontal exec...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000013488.52742.b4
更新日期:2004-01-01 00:00:00
abstract::Signal transducers and activators of transcription 3 (STAT3) are activated by various cytokines and oncogenes; however, the activity and pathogenesis of STAT3 in diffuse large B cell lymphoma of the central nervous system have not been thoroughly elucidated. We investigated the phosphorylation levels of STAT3 in 40 sp...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1843-9
更新日期:2015-09-01 00:00:00
abstract::Alkaline phosphatase (ALPase) and Mg2+-activated ATPase (Mg2+-ATPase) activities were demonstrated in human brain tumors by light and electron microscopy. Four cases of glioma, i.e., two cases of astrocytoma, grade II, and two cases of glioblastoma, were used as materials. At the light microscopic level, Mg2+-ATPase a...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00165181
更新日期:1985-01-01 00:00:00
abstract:INTRODUCTION:Central nervous system hemangioblastoma is a benign tumor associated with or without von Hippel-Lindau (VHL) disease which is an autosomal dominant hereditary disease that results from a germline mutation in the VHL gene. A main axis of signaling pathways in central nervous system hemangioblastoma is VHL-H...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-020-03506-8
更新日期:2020-05-01 00:00:00
abstract::Long term survival is rare in patients with glioblastoma multiforme (GBM). To determine if the tumors of patients with long survivals constitute a subgroup of patients with identifiable molecular genetic characteristics, we studied the p53 gene and Epidermal Growth Factor Receptor (EGF-R) expression in long-term survi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00165483
更新日期:1996-03-01 00:00:00