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-biotin nick end labelling (TUNEL) method. Rat brain tumors induced by means of prenatal exposure to ethylnitrosourea (ENU) were treated with 1-(4-amino-2-methyl-5-pyrimidinyl)methyl-3-(2-chloroethyl)-3-nitrosourea hydrochloride (ACNU) and/or vincristine. Tumors more than 2 mm in size were considered to be drug resistant. The expression of GST-mu was strongly positive in ACNU-treated brain tumors, while p-glycoprotein was overexpressed in vincristine-treated brain tumors. Neither p53 nor bcl-2 expression directly correlated with apoptosis identified by TUNEL method, but tumors lacking apoptotic cells always demonstrated the expression of either GST-mu or p-glycoprotein. These results indicate that tumors resistant to chemotherapy might not be susceptible to induction of apoptosis, and therefore that mechanisms of drug resistance are related to programmed cell death in brain tumors.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
Yabuno T,Konishi N,Nakamura M,Tsuzuki T,Tsunoda S,Sakaki T,Hiasa Ydoi
10.1023/a:1005878402133subject
Has Abstractpub_date
1998-01-01 00:00:00pages
105-12issue
2eissn
0167-594Xissn
1573-7373journal_volume
36pub_type
杂志文章abstract:SUBJECT:To date there is no established tumor marker for the clinical follow-up of glioblastoma, WHO grade IV, (GBM) which constitutes the most frequent and malignant primary brain tumor. However, since there is promising data that the serum glial fibrillary acidic protein (sGFAP) may serve as a biomarker for glial bra...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-018-2898-1
更新日期:2018-09-01 00:00:00
abstract::Astrocytic neoplasms are genetically heterogeneous; however a low frequency of genomic changes has been found in juvenile pilocytic astrocytoma (PA) in molecular studies. Concerning pleomorphic xanthoastrocytomas (PXA), recent studies have given heterogeneous results for chromosomal alterations. We studied the subtelo...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-008-9763-6
更新日期:2009-06-01 00:00:00
abstract:PURPOSE:Therapeutic intervention at glioblastoma (GBM) progression, as defined by current assessment criteria, is arguably too late as second-line therapies fail to extend survival. Still, most GBM trials target recurrent disease. We propose integration of a novel imaging biomarker to more confidently and promptly defi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-020-03565-x
更新日期:2020-07-01 00:00:00
abstract::The aim of this study was to assess the effectiveness of adding viral vector-mediated gene therapy with herpes simplex virus thymidine kinase (HSV-tk) to standard treatment, in comparison with standard treatment alone to treat patients with high-grade gliomas (HGGs). A literature search of the databases PubMed, Embase...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,meta分析,评审
doi:10.1007/s11060-014-1444-z
更新日期:2014-06-01 00:00:00
abstract::Cancer is a leading cause of death in the United States. Despite the development of advanced treatment for many malignancies, a large number of patients will require evaluation and possible surgical intervention for lesions which have metastasized to or directly invaded the spinal column. The recommendations for opera...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/BF01053420
更新日期:1995-01-01 00:00:00
abstract::The cerebrospinal fluid (CSF) pharmacokinetics of cytosine arabinoside (Ara-C) was determined in 8 patients with metastatic cancer in the central nervous system. High dose (3 gm/M2) one-hour intravenous infusions of Ara-C were given with serial CSF sampling obtained from indwelling Ommaya reservoirs. CSF was analyzed ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF02228887
更新日期:1985-01-01 00:00:00
abstract::Aberrant expression of stem cell-related genes in tumors may confer more primitive and aggressive traits affecting clinical outcome. Here, we investigated expression and prognostic value of the neural stem cell marker CD133, as well as of the pluripotency genes LIN28 and OCT4 in 37 samples of pediatric medulloblastoma...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-011-0647-9
更新日期:2012-01-01 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::A retrospective evaluation of single agent bevacizumab in adults with recurrent glioblastoma (GBM) with an objective of determining progression free survival (PFS). There is no standard therapy for recurrent GBM after failure of alkylator-based chemotherapy. A total of 50 adults, ages 36-70 years (median 64), with rec...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章
doi:10.1007/s11060-009-9957-6
更新日期:2010-01-01 00:00:00
abstract::Intracranial pseudolymphoma is a rare tumor of the central nervous system. A 35-year-old woman presented with a frontal subcutaneous tumor. Magnetic resonance imaging revealed a left frontal meningeal tumor involving subcutaneous tissue without bone involvement. The mass was completely removed and the histological asp...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1006414717891
更新日期:2000-04-01 00:00:00
abstract::Primary germinomas in the spinal cord are very rare with only 15 cases published previously. In this case a 22-year-old woman with urinary incontinence, lumbago, and bilateral leg pain and weakness was found to have a solid tumor in the conus medullaris between the L1 and L2 vertebral bodies. Serum HCG was elevated wi...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-005-3092-9
更新日期:2006-01-01 00:00:00
abstract::We observed a stripe-like pattern of regional cerebral blood volume (rCBV) increase in a defined region adjacent to the contrast enhancement (CE) on MRI of glioblastomas (GBM) that we defined as the "striate sign" (SS). We hypothesized that the SS marks infiltration of GBM outside the CE volume transforming into futur...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-010-0421-4
更新日期:2011-07-01 00:00:00
abstract::Successful management of a heavily pretreated 58-year-old woman with metastatic esthesioneuoblastoma using temozolomide is reported. There is no standard treatment of this tumors with extra- and intracranial manifestations. The response, long term stability and high quality of life using temozolomide for this tumor en...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/b:neon.0000040826.30636.4a
更新日期:2004-10-01 00:00:00
abstract::Proneural and mesenchymal are two subtypes of glioblastoma identified by gene expression profiling. In this study, the primary aim was to detect markers to develop a clinically applicable method for distinguishing proneural and mesenchymal glioblastoma. The secondary aims were to investigate the temporospatial dynamic...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-015-1886-y
更新日期:2015-10-01 00:00:00
abstract:INTRODUCTION:It is useful to know the molecular subtype of lower-grade gliomas (LGG) when deciding on a treatment strategy. This study aims to diagnose this preoperatively. METHODS:A deep learning model was developed to predict the 3-group molecular subtype using multimodal data including magnetic resonance imaging (M...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-019-03376-9
更新日期:2020-01-01 00:00:00
abstract:UNLABELLED:The pupose of this study is to assess the long-term outcome and toxicity of fractionated stereotactic radiation therapy (FSRT) and stereotactic radiosurgery (SRS) for 100 vestibular schwannomas treated at a single institution. From 1993 to 2007, 104 patients underwent were treated with radiation therapy for ...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-013-1282-4
更新日期:2014-01-01 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::Chromatin modification through histone deacetylase inhibition has shown evidence of activity against malignancies. The mechanism of action of such agents are pleiotropic and potentially tumor specific. In this study, we studied the mechanisms of vorinostat-induced cellular effects in gliomas. The effects of vorinostat...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-011-0604-7
更新日期:2011-11-01 00:00:00
abstract::This study investigated a single institution's experience with volumetric modulated arc therapy (VMAT) directed stereotactic ablative body radiotherapy (SABR) for vertebral metastases. From 2010 to 2014, 95 lesions of spinal metastases in 73 patients were treated with SABR using VMAT. Clinical local control, pain leve...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-017-2428-6
更新日期:2017-05-01 00:00:00
abstract::Levels of rhodamine 123 (Rh-123), a new antineoplastic drug, were measured using high performance liquid chromatography in normal brain, malignant glioma and brain adjacent to tumor after a single intravenous injection of drug into rats with intracerebral tumors. Consistently higher levels of Rh-123 were seen in tumor...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF00177430
更新日期:1988-12-01 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:PURPOSE:Stereotactic radiosurgery is an established treatment option for sporadic meningiomas, though limited data exists for radiation-induced lesions. METHODS:Patients treated with cobalt-60 radiosurgery between October 2005 and December 2018 in an institutional registry were reviewed. Single fraction treatments wer...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-020-03515-7
更新日期:2020-06-01 00:00:00
abstract::The records of 14 patients with a tumour in the pineal or supra-sellar region seen at The Norwegian Radium Hospital, Oslo between 1973-1980 have been studied retrospectively. The problems with a widely accepted classification are discussed, as well as the choice of treatment (surgery versus radiation) and the indicati...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF02157997
更新日期:1986-01-01 00:00:00
abstract::p53 mutations are the most frequently detected genetic alterations of gliomas, appearing in a similar proportion of low and high grade astrocytomas, while the amplification of epidermal growth factor receptor (EGFR) gene appears mainly in glioblastomas. Thus, these changes seem to delineate two subgroups of high grade...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/BF01054764
更新日期:1995-10-01 00:00:00
abstract::In a retrospective analysis based on a malignant glioma databank, we describe effects of age, sex and diagnosis upon survival in patients with malignant cerebral glioma with a pre-treatment Karnofsky-index of 60 or more. All patients had been treated with 55-60Gy radiotherapy and nitrosurea-based adjuvant chemotherapy...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1023/a:1011849411227
更新日期:2001-05-01 00:00:00
abstract::Several molecular markers have been proposed as predictors of outcome in patients with high grade gliomas. We report a retrospective multicenter study of 97 consecutive adult patients with anaplastic astrocytoma (AA) treated with radiation therapy (RT) plus concomitant and adjuvant temozolomide (TMZ) between October 2...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,多中心研究
doi:10.1007/s11060-014-1443-0
更新日期:2014-06-01 00:00:00
abstract::Gemistocytic astrocytoma still continues to be enigmatic; both in terms of definition and prognostic implications. The major issue of contention has been the clinical relevance of this pathological entity. The currently accepted definition of gemistocytic astrocytoma requires 20% or more gemistocytes, and considers th...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章,评审
doi:10.1007/s11060-005-4897-2
更新日期:2006-01-01 00:00:00
abstract::The basement membrane collagen IV-degrading matrix metalloproteinases -2 and -9 (MMPs) are most often linked to the malignant phenotype of tumor cells by playing a critical role in invasion, metastasis, angiogenesis, and vasculogenesis. We verified the activity of these two MMPs in the sera of patients affected by bra...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-016-2297-4
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:This study was undertaken to evaluate the radiographic response to two cycles of chemotherapy prior to irradiation in newly diagnosed children with high-grade astrocytomas. PATIENTS AND METHODS:One hundred and thirty children less than 21 years of age with newly-diagnosed high-grade astrocytoma were treated wi...
journal_title:Journal of neuro-oncology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF01063775
更新日期:1994-01-01 00:00:00
abstract:PURPOSE:Glioblastoma (GBM) is the most aggressive adult brain cancer, with a 15 month median survivorship attributed to the existence of treatment-refractory brain tumor initiating cells (BTICs). In order to better understand the mechanisms regulating the tumorigenic properties of this population, we studied the role o...
journal_title:Journal of neuro-oncology
pub_type: 杂志文章
doi:10.1007/s11060-019-03192-1
更新日期:2019-07-01 00:00:00