Abstract：
:Human glioma usually shows intrinsic multidrug resistance because of the blood-brain barrier (BBB), in which membrane-associated P-glycoprotein (P-gp), encoded by the human multidrug resistance gene MDR1, plays a role. We studied drug sensitivity to vincristine (VCR), doxorubicin (DOX) and nimustine (ACNU) in both intracerebrally and subcutaneously xenotransplanted human glioma. We examined the levels of MDR1 and murine mdr3 gene expression in the xenografts by reverse transcriptase polymerase chain reaction and the localization of P-gp by immunohistochemistry. Six of seven subcutaneously transplanted xenografts (scX) were sensitive to the above three drugs. In contrast, all three intracerebrally transplanted human glioma xenografts (icX) were resistant to P-gp-mediated drugs VCR and DOX, but were sensitive to the non-P-gp-mediated drug ACNU. Neither icX nor scX showed any MDR1 expression. Intracerebrally transplanted human glioma xenografts showed an increased level of murine mdr3 gene expression, whereas scX showed only faint expression. The localization of P-gp was limited to the stromal vessels in icX by immunohistochemistry, whereas scX expressed no P-gp. Our findings suggest that the P-gp expressed on the stromal vessels in icX is a major contributing factor to multidrug resistance in human glioma in vivo.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Takamiya Y,Abe Y,Tanaka Y,Tsugu A,Kazuno M,Oshika Y,Maruo K,Ohnishi Y,Sato O,Yamazaki H,Kijima H,Ueyama Y,Tamaoki N,Nakamura Mdoi
10.1038/bjc.1997.408subject
Has Abstractpub_date
1997-01-01 00:00:00pages
445-50issue
4eissn
0007-0920issn
1532-1827journal_volume
76pub_type
杂志文章abstract：:We have previously reported that supplementation with folic acid (1.2 mg day(-1) for 12 week) elicited a significant improvement in the folate status of 61 healthy volunteers. We have examined effects of this supplement on markers of genomic stability. Little is known about the effect of folate supplementation on DNA ...
journal_title：British journal of cancer
pub_type： 杂志文章,随机对照试验
doi：10.1038/sj.bjc.6603197
更新日期：2006-06-19 00:00:00
abstract：BACKGROUND:Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) contains crucial information about tumour heterogeneity and the transport limitations that reduce drug efficacy. Mathematical modelling of drug delivery and cellular responsiveness based on underutilised DCE-MRI data has the unique potential to p...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6605773
更新日期：2010-08-10 00:00:00
abstract：:The aim of this study was to investigate the expression of the protein tyrosine phosphatases (PTP) PRL-1, PRL-2, and PRL-3 in human breast cancer and to evaluate its clinical and prognostic significance. PRL-PTP mRNA expression was examined in malignant (n = 7) and nonmalignant (n = 7) cryoconserved breast tissue samp...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6603261
更新日期：2006-08-07 00:00:00
abstract：:Eighteen consecutive patients with measurable locally advanced or metastatic pancreatic adenocarcinoma were treated with goserelin (Zoladex) 3.6 mg subcutaneously every 4 weeks. Hydrocortisone 20 milligrams twice daily was commenced with the second injection of goserelin. Objective tumour response was monitored by com...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章
doi：10.1038/bjc.1993.69
更新日期：1993-02-01 00:00:00
abstract：:Pancreatic cancers occurring in carriers of a pathogenic germline alteration in BRCA1/2 (gBRCA1/2) are assumed to demonstrate homologous recombination repair deficiency (HRD), associated with sensitivity to platinum-based chemotherapy and synthetic lethality with PARP inhibitors (PARPi). However, primary and secondary...
journal_title：British journal of cancer
pub_type： 评论,社论
doi：10.1038/s41416-019-0645-9
更新日期：2020-02-01 00:00:00
abstract：BACKGROUND:Whether red and processed meat consumption is a risk factor for pancreatic cancer remains unclear. We conducted a meta-analysis to summarise the evidence from prospective studies of red and processed meat consumption and pancreatic cancer risk. METHODS:Relevant studies were identified by searching PubMed an...
journal_title：British journal of cancer
pub_type： 杂志文章,meta分析
doi：10.1038/bjc.2011.585
更新日期：2012-01-31 00:00:00
abstract：:Emerging evidences suggest the existence of a new mode of epidermal growth factor receptor (EGFR) signalling pathway in which activated EGFR undergoes nuclear translocalization and subsequently regulates gene expression and potentially mediates other cellular processes. This signalling route is distinct from the bette...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：
更新日期：2007-01-01 00:00:00
abstract：BACKGROUND:The immune system has a central role in controlling cancer, and factors that influence protective antitumour immunity could therefore have a significant impact on the course of malignant disease. Opioids are essential for the management of cancer pain, and preclinical studies indicate that opioids have the p...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/bjc.2014.384
更新日期：2014-08-26 00:00:00
abstract：:The efficacy of photodynamic therapy (PDT) using delta-aminolaevulinic acid (ALA)-induced protoporphyrin IX (PpIX) sensitisation and laser light at 635 nm was investigated in the treatment of experimental hepatic tumours. The model of liver tumours was induced either by local inoculation or by administration of tumour...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1996.584
更新日期：1996-11-01 00:00:00
abstract：:NAD(P)H:quinone oxidoreductase (NQO1, EC 1.6.99.2) is an obligate two-electron reductase that can either bioactivate or detoxify quinones and has been proposed to play an important role in chemoprevention. We have previously characterized a homozygous point mutation in the BE human colon carcinoma cell line that leads...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1997.11
更新日期：1997-01-01 00:00:00
abstract：:Recent studies involving animal models of cancer and clinicopathological analyses of human tumours suggest that the growth of lymphatic vessels (lymphangiogenesis) in or nearby tumours is associated with the metastatic spread of cancer. The best validated molecular signalling system for tumour lymphangiogenesis involv...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/sj.bjc.6603120
更新日期：2006-05-22 00:00:00
abstract：:Experimental studies show that vitamin D derivatives are potent anticarcinogenic factors. Epidemiological observations support this, and vitamin D sufficiency has been hypothesised to be an important risk-reducing factor in several forms of cancer. Vitamin D level exhibits seasonal variations. In the present work, we ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6602722
更新日期：2005-09-05 00:00:00
abstract：:Electron spin resonance (ESR) spectroscopy was used to examine changes in the concentration of paramagnetic metal ions in Yoshida tumours carried by female Wistar rats. Blood, spleen and lymph nodes from these animals were also examined by ESR. A decrease in the concentration of a paramagnetic species associated with ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1976.211
更新日期：1976-11-01 00:00:00
abstract：BACKGROUND:The National Comprehensive Cancer Network (NCCN) guidelines provide recommendations for staging of prostate cancer patients in the objective regarding presence of locoregional lymph node metastases (LNM) and bone metastases. We tested the performance characteristics of these recommendations in a community se...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/s41416-018-0323-3
更新日期：2018-12-01 00:00:00
abstract：BACKGROUND:Tumours are made up of a mixed population of different types of cells that include normal structures as well as ones associated with the malignancy, and there are multiple interactions between the malignant cells and the local microenvironment. These intercellular interactions, modulated by the microenvironm...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2011.517
更新日期：2012-01-03 00:00:00
abstract：:Protein kinase B/Akt has been described as a central mediator of anti-apoptotic signals transduced by the PI3 kinase. Although the role of Akt in the suppression of apoptosis is well elucidated, a potential function of Akt in tumorigenesis and chemoresistance is less intensively documented. In this study, we describe ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6600566
更新日期：2002-10-07 00:00:00
abstract：:BGC9331 is a rationally designed, specific nonpolyglutamatable thymidylate synthase (TS) inhibitor that is active in gynaecological malignancies. In the light of the sensitivity of human ovarian tumour cell lines to BGC9331 and non-cross resistance to platinum drugs, we studied the combination BGC9331/carboplatin (BCA...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章
doi：10.1038/sj.bjc.6602811
更新日期：2005-10-17 00:00:00
abstract：:To evaluate the impact of prior adjuvant chemotherapy on response rate (RR), progression-free (PFS) and overall survival (OS) of metastatic breast cancer patients treated with epirubicin/paclitaxel (ET) regimens. In all, 291 patients enrolled in five studies in metastatic breast cancer were analysed: 101 (35%) were ch...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6601634
更新日期：2004-03-08 00:00:00
abstract：:The association between breast and endometrial cancer was investigated in a cohort consisting of 60,065 subjects (99% of all women in whom a first breast cancer was diagnosed in Sweden in 1960-63 and 1968-81). Complete follow-up until 1981 revealed a total of 260 endometrial cancers, as against an expected number of 1...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1987.16
更新日期：1987-01-01 00:00:00
abstract：:Platinum diamine dichloride and tetrachloride inhibit the formation of antibody-forming cells in the mouse spleen after injection of sheep red cells. The dichloride is the more effective agent. It acts best when given 2 days after the antigen, which suggests that cells are more sensitive to its action when they are ra...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1971.27
更新日期：1971-03-01 00:00:00
abstract：BACKGROUND:Heterogeneity and low incidence comprise the biggest challenge in sarcoma diagnosis and treatment. Chemotherapy, although efficient for some sarcoma subtypes, generally results in poor clinical responses and is mostly recommended for advanced disease. Specific genomic aberrations have been identified in some...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/s41416-018-0359-4
更新日期：2019-02-01 00:00:00
abstract：:We examined a panel of 25 small cell lung cancer (SCLC) cell lines and nude mouse xenografts for expression of the proto-oncogenes c-met and c-kit, and for expression of the corresponding ligands, hepatocyte growth factor (HGF) (also known as scatter factor (SF)), and stem cell factor (SCF), respectively. Expression o...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1993.7
更新日期：1993-01-01 00:00:00
abstract：BACKGROUND:The addition of breast magnetic resonance imaging (MRI) to screening mammography for women with BRCA mutations significantly increases sensitivity, but there is little data on clinical outcomes. We report screening performance, cancer stage, distant recurrence rate, and breast cancer-specific mortality in ou...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2012.204
更新日期：2012-06-26 00:00:00
abstract：:Since hyperinsulinaemia may promote obesity-linked cancers, we compared type 2 diabetes prevalence among oesophageal adenocarcinoma (OAC) patients and population controls. Diabetes increased the risk of OAC (adjusted odds ratio 1.59, 95% confidence interval (CI) 1.04-2.43), although the risk was attenuated after furth...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6604908
更新日期：2009-03-10 00:00:00
abstract：:The present study investigates the role of nitric oxide and the involvement of nitric oxide synthase II isoform on the invasion of human colorectal adenocarcinoma cell lines HRT-18 and HT-29. HRT-18 cells, which constitutively express nitric oxide synthase II mRNA were three-fold more invasive in a Matrigel invasion a...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6600224
更新日期：2002-04-22 00:00:00
abstract：:Studies of underground miners occupationally exposed to radon have consistently demonstrated an increased risk of lung cancer in both smokers and non-smokers. Radon exposure also occurs elsewhere, especially in houses, and estimates based on the findings for miners suggest that residential radon is responsible for abo...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1998.506
更新日期：1998-08-01 00:00:00
abstract：:In advanced pancreatic cancer, level one evidence has established a significant survival advantage with chemotherapy, compared to best supportive care. The treatment-associated toxicity needs to be evaluated. This study examines the secondary outcome measures for chemotherapy in advanced pancreatic cancer using meta-a...
journal_title：British journal of cancer
pub_type： 杂志文章,meta分析
doi：10.1038/sj.bjc.6604436
更新日期：2008-07-08 00:00:00
abstract：:Extracellular proteases of the matrix metalloproteinase (MMP) and serine protease families participate in many aspects of tumour growth and metastasis. Using quantitative real-time RT-PCR analysis, we have undertaken a comprehensive survey of the expression of these enzymes and of their natural inhibitors in 44 cases ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6602630
更新日期：2005-06-20 00:00:00
abstract：BACKGROUND:Hypoxia can activate autophagy, a self-digest adaptive process that maintains cell turnover. Mammalian target of rapamycin (mTOR) inhibitors are used to treat cancer but also stimulate autophagy. METHODS:Human mammary cancer cells and derived xenografts were used to examine whether hypoxia could exacerbate ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2013.644
更新日期：2013-11-12 00:00:00
abstract：:In this paper, we develop a Markov chain model to estimate parameters pertaining to the natural history of nasopharyngeal carcinoma (NPC). The model is of progression from no disease to Epstein-Barr virus (EBV) infection, preclinical screen-detectable tumour and clinical tumour. We derive tentative estimates of the pa...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6690301
更新日期：1999-04-01 00:00:00
