Abstract：
:Recurrent gliomas are most often treated by chemotherapy. However, these tumors typically acquire resistance to most drugs administered, and patients will usually die of recurrent tumor. Factors which may play a role include overexpression of putative multidrug resistance genes, such as the multidrug resistance gene 1 (MDR1), multidrug resistance associated protein gene (MRP), 06-alkylguanine, DNA alkyltransferase gene (06MT) and excision repair cross complementing gene 1 (ERCC1). Tumor hypoxia has also been shown to be associated with drug resistance in other soft tissue tumors. Since gliomas have regions of diminished oxygenation, and have clinical resistance to chemotherapy, the relationship between phenotypic resistance to chemotherapy after hypoxic exposure and expression of drug resistance genes was investigated in glioma cell lines (U373 MG, PFAT-MT). After a 24 hour exposure to hypoxia, drugs 1, 3-bis, 2-chloroethyl-1-nitrosurea (BCNU) and cis-diammine, dichloroplatinum II (CDDP) were administered, and cell survival was determined. Hypoxic exposure was associated with increased survival of the cell lines after administration of BCNU and CDDP, with resistance to BCNU 15 to 30-fold when compared to cells which did not undergo hypoxic exposure. Both tumor cell lines also showed some degree of resistance to CDDP, although not to the extent of BCNU (2 to 3-fold increased resistance). The expression of the drug resistance genes was found to be unchanged when comparing cells which had undergone hypoxic exposure and those which had not. Thus, hypoxic exposure is associated with substantial drug resistance in brain tumor cell lines. The lack of correlation between the induced phenotype and known drug resistance genes suggests other mechanisms may be acting in these tumors in hypoxic conditions.
journal_name
J Neurooncoljournal_title
Journal of neuro-oncologyauthors
Liang BCdoi
10.1007/BF00182138subject
Has Abstractpub_date
1996-08-01 00:00:00pages
149-55issue
2eissn
0167-594Xissn
1573-7373journal_volume
29pub_type
杂志文章abstract：:Improvements in imaging are increasing the detection of multiple lesions in the setting of glioblastoma. Occasionally distant non-enhancing lesions may be identified which have the appearances of a multicentric low-grade glioma. We aimed to determine the incidence, prognostic significance and diagnostic value of this ...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,多中心研究
doi：10.1007/s11060-016-2193-y
更新日期：2016-09-01 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
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：:High-grade gliomas release excitotoxic concentrations of glutamate which contributes to their malignant phenotype. To improve our understanding of the mechanisms by which glutamate enhances tumor growth and invasion, we examined alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA)-mediated signaling in glio...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-008-9552-2
更新日期：2008-06-01 00:00:00
abstract：:Gliomas, the most common malignant primary brain tumors, are universally fatal once they progress from low-grade into high-grade neoplasms. In recent years, we have accumulated unprecedented data about the genetic and epigenetic abnormalities in gliomas; yet, our appreciation of how these deadly tumors arise is still ...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,评审
doi：10.1007/s11060-014-1499-x
更新日期：2014-09-01 00:00:00
abstract：:Leptomeningeal spread of childhood primary central nervous system (CNS) neoplasms, also known as leptomeningeal disease (LMD), significantly affects prognosis and treatment. Lumbar cerebrospinal fluid (CSF) cytology and spinal magnetic resonance imaging (MRI) are considered critical for diagnosis of LMD. It has been s...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-007-9493-1
更新日期：2008-03-01 00:00:00
abstract：:5-aminolevulinic acid (5-ALA) introduction in the surgical management of Glioblastoma (GBM) enables the intra-operatively identification of cancer cells in the mass by means of fluorescence. Here, we analyzed the phenotype of GBM cells isolated from distinct tumour areas determined by 5-ALA (tumour core, 5-ALA intense...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-013-1348-3
更新日期：2014-02-01 00:00:00
abstract：:Medulloblastoma with melanotic differentiation, a rare variant of medulloblastoma, often carries a poor prognosis. We present such a case of a 4 year male with this rare, aggressive tumor. Additionally, we have reviewed the literature and report on the features important in the pathologic and radiologic diagnosis in t...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,评审
doi：10.1007/s11060-010-0436-x
更新日期：2011-07-01 00:00:00
abstract：BACKGROUND:The diagnosis of sarcomatous transformation of plexiform neurofibromas in Neurofibromatosis-1 (NF 1) is a clinical and radiological challenge. Considerable overlap exists in the clinical and the radiological characteristics between the benign enlarging neurofibromas and their counterparts undergoing malignan...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-006-9161-x
更新日期：2006-10-01 00:00:00
abstract：PURPOSE:The highly vascular malignant brain tumor glioblastoma (GBM) appears to be an ideal target for anti-angiogenic therapy; however, clinical trials to date suggest the VEGF antibody bevacizumab affects only progression-free survival. Here we analyze a group of patients with GBM who received bevacizumab treatment a...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-019-03102-5
更新日期：2019-04-01 00:00:00
abstract：:Radiotherapy (RT) and concomitant/adjuvant therapy with temozolomide (Temodar) is a common treatment regimen for children and adults with glioma. Although temozolomide is generally well tolerated with temporary myelosuppression as the primary dose-limiting toxicity, irreversible bone-marrow aplasia after treatment wit...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-008-9704-4
更新日期：2009-01-01 00:00:00
abstract：OBJECTIVE:Radiation necrosis is a well-known complication of radiotherapy for malignant brain tumors. Although surgery was once considered the mainstay of treatment, no recent reports have evaluated the use of intraoperative magnetic resonance imaging (IOMRI) and frameless stereotaxis during surgical resection of radia...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1023/b:neon.0000024744.16031.e9
更新日期：2004-05-01 00:00:00
abstract：:Five quantitative histologic factors, differing linear combinations of 26 reliably recognized histologic features, account for much of the histologic variance in 1068 children with infratentorial neuroglial tumors in the Childhood Brain Tumor Consortium (CBTC) database. In this study, we used the scores on the Spongy,...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,多中心研究
doi：10.1023/a:1005984531474
更新日期：1998-08-01 00:00:00
abstract：:Patients with metastatic disease are living longer and may be confronted with locally or regionally recurrent brain metastases (BM) after prior stereotactic radiosurgery (SRS) or fractionated stereotactic radiotherapy (FSRT). This study analyzes outcomes in patients without prior whole brain radiotherapy (WBRT) who we...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-013-1191-6
更新日期：2013-10-01 00:00:00
abstract：:The use of radiation therapy in the management of intramedullary spinal cord tumors remains controversial. Several studies indicate that the use of postoperative radiation therapy modestly improves both local control and survival in spinal cord ependymomas and astrocytomas. Modern treatment planning and imaging allow ...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,评审
doi：10.1023/a:1006470523052
更新日期：2000-05-01 00:00:00
abstract：:Carcinomatous meningitis (CM) occurs in less than 10% of cancer patients. Although patients frequently present with a focal complaint, multifocal signs are often found following careful neurological examination. The gold standard for diagnosis remains the demonstration of neoplastic cells in the cerebrospinal fluid. D...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-005-4815-7
更新日期：2006-01-01 00:00:00
abstract：:Among diffuse gliomas, oligodendrogliomas may account for 25% of cases. They have a better prognosis and chemosensitivity as compared to astrocytomas. Genetic studies have shown a correlation between oligodendrocyte phenotype and presence of 1p/19q deletions. In addition, these deletions are of prognostic value. The a...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1023/b:neon.0000027758.10286.c1
更新日期：2004-06-01 00:00:00
abstract：PURPOSE:The poor results from treatment of high grade glioma prompted us to explore new protocols involving concurrent radio-chemotherapy. Our primary objective was to evaluate the feasibility of very early postoperative chemotherapy with BCNU, concurrent radio-chemotherapy with carboplatin and teniposide, and post-rad...
journal_title：Journal of neuro-oncology
pub_type： 临床试验,杂志文章
doi：10.1007/BF00177276
更新日期：1996-12-01 00:00:00
abstract：:Glioblastomas are malignant brain tumors with poor prognosis. Lately, data from clinical studies assessing the role of co-medications in different cancer types suggested reduced mortality and potential anti-tumor activity for statins, angiotensin-I converting enzyme inhibitors (ACEI) and angiotensin II receptor blocke...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1007/s11060-018-2786-8
更新日期：2018-05-01 00:00:00
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 endoth...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-006-9171-8
更新日期：2006-11-01 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：:Treatment options and prognosis remains poor for patients with recurrent glioblastoma multiforme. These tumors are highly vascularised and over express angiogenic factors such as vascular endothelial growth factor and may potentially be responsive to antiangiogenic therapies. We present the results of a phase II trial...
journal_title：Journal of neuro-oncology
pub_type： 临床试验,杂志文章
doi：10.1023/a:1012554328801
更新日期：2001-08-01 00:00:00
abstract：INTRODUCTION:There has been a resurgence of interest in brachytherapy as a treatment for glioblastoma, with several currently ongoing clinical trials. To provide a foundation for the analysis of these trials, we analyze the Surveillance, Epidemiology, and End Results (SEER) database to determine whether receipt of brac...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-019-03268-y
更新日期：2019-10-01 00:00:00
abstract：:Retaspimycin hydrochloride (IPI-504), an Hsp90 (heat shock protein 90) inhibitor, has shown activity in multiple preclinical cancer models, such as lung, breast and ovarian cancers. However, its biological effects in gliomas and normal brain derived cellular populations remain unknown. In this study, we profiled the e...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-014-1579-y
更新日期：2014-12-01 00:00:00
abstract：:Central nervous system (CNS) involvement is a rare complication of chronic lymphocytic leukemia (CLL) with varied outcomes. We contribute two additional cases of CLL with CNS involvement. The clinical course and response to treatment are described. All 78 previously reported cases of CLL with CNS involvement are prese...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-011-0636-z
更新日期：2012-01-01 00:00:00
abstract：:We evaluated the results of stereotactic radiosurgery (SRS) alone using gamma knife (GK) for selected patients with 1-10 brain metastases without prophylactic whole-brain radiation therapy (WBRT) among JLGK0901-eligible cases. Seven hundred seventy-eight consecutive cases meeting the following JLGK0901 study inclusion...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章,多中心研究
doi：10.1007/s11060-010-0169-x
更新日期：2010-06-01 00:00:00
abstract：:The determination of optimal therapy for ependymoma (EP) in infants is ongoing. We describe the incidence, management and outcomes of Canadian infants with EP to discern potential future research questions. Of 579 cases registered in a national database of children <36 months of age diagnosed with a brain tumor from 1...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-014-1396-3
更新日期：2014-04-01 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：: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：:ERCC1 and ERCC2 have been known to belong to the nucleotide excision repair (NER) pathway and are essential to the repair of cisplatin DNA adducts. In the present study, we have examined the potential correlation of ERCC1, ERCC2 mRNA expression and single nucleotide polymorphism (SNP) to chemotherapy drug cytotoxicity...
journal_title：Journal of neuro-oncology
pub_type： 杂志文章
doi：10.1007/s11060-006-9290-2
更新日期：2007-05-01 00:00:00
