Abstract:
:Thermosensitisation by step-down heating (SDH) has previously been demonstrated in experimental rodent tumours. The purpose of the study reported here was to investigate whether the SDH effect in tumours in part may be attributed to heat-induced alterations in the capillary network and/or the microenvironment. Two human melanoma xenograft lines differing substantially in vascular parameters were selected for the study. A thermostatically regulated water bath was used for heat treatment. The conditioning treatment (44.5 degrees C or 45.5 degrees C for 15 min) was given in vivo, whereas the test treatment (42.0 degrees C for 45, 90, 135 or 180 min) was given either in vitro or in vivo. Treatment response was measured in vitro using a cell clonogenicity assay. Fraction of occluded vessels following heat treatment was assessed by examination of histological sections from tumours whose vascular network was filled with a contrast agent. Tumour bioenergetic status and tumour pH were measured by 31P magnetic resonance spectroscopy. The conditioning heat treatments caused significant vessel occlusion, decreased tumour bioenergetic status and decreased tumour pH in both tumour lines. The SDH effect measured when the test treatment was given in vivo was significantly increased relative to that measured when the test treatment was given in vitro. The magnitude of the increase showed a close relationship to fraction of occluded vessels, tumour bioenergetic status and tumour pH measured 90 min after treatment with 44.5 degrees C or 45.5 degrees C for 15 min. The increased SDH effect in vivo was probably attributable to tumour cells that were heat sensitive owing to the induction of low nutritional status and pH during the conditioning treatment. Consequently, the SDH effect in some tumours may in part be due to heat-induced alterations in the microenvironment. This suggests that SDH may be exploited clinically to achieve increased cell inactivation in tumours relative to the surrounding normal tissues.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Rofstad EKdoi
10.1038/bjc.1994.327subject
Has Abstractpub_date
1994-09-01 00:00:00pages
453-8issue
3eissn
0007-0920issn
1532-1827journal_volume
70pub_type
杂志文章abstract::A series of 176 archival cervical intraepithelial neoplasia (CIN) was analysed for the presence, viral load and integration status of 'high-risk' types of human papillomavirus (HR-HPV). The samples were assayed using newly developed methods based on real-time PCR. Two methods for the extraction of DNA from the paraffi...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6602648
更新日期:2005-06-20 00:00:00
abstract::The overall tumour incidence and breast cancer incidence related to hormone replacement therapy (HRT) were followed in a population-based cohort of 29 508 women, aged 25-65 when interviewed in 1990-92. By the end of the follow up in December 1999, there were 226 611 person-years of observation. A total of 1145 maligna...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1054/bjoc.2001.1899
更新日期:2001-09-01 00:00:00
abstract::Minisatellite DNA probes which can detect a large number of autosomal loci dispersed throughout the human genome were used to examine the constitutional and tumour DNA of 35 patients with a variety of cancers of which eight were of gastrointestinal origin. Somatic changes were seen in the tumour DNA in ten of the 35 c...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1987.71
更新日期:1987-04-01 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1996.627
更新日期:1996-12-01 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6601438
更新日期:2004-01-12 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/s41416-020-01181-0
更新日期:2020-12-10 00:00:00
abstract::In a meta-analysis of testicular cancer in twins, twins had a 30% increased risk (estimate 1.31, 95% CI 1.1-1.6), providing indirect support for the hypothesis that in utero hormone variations influence risk of testicular cancer. The summary-estimate for dizygotic twins was 1.3 (1.0-1.7) and for monozygotic or same se...
journal_title:British journal of cancer
pub_type: 杂志文章,meta分析
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更新日期:2008-01-15 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6603171
更新日期:2006-06-05 00:00:00
abstract::Selection of cytostatic agents for intrathecal administration is the subject of this paper.Both the toxic side effects-destruction of blood-brain barrier and change of body weight-and the cytostatic effects on intracranially transplanted Yoshida ascites sarcoma were investigated of intrathecal administration of variou...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1970.59
更新日期:1970-09-01 00:00:00
abstract::A standardised, effective systemic therapy for metastatic neuroendocrine tumours (NETs) has not been established to date. We reviewed the management of 15 patients with inoperable, metastatic NET treated systematically with a combination chemotherapy regimen of infusional 5-fluorouracil, folinic acid and streptozocin....
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6601167
更新日期:2003-08-04 00:00:00
abstract:BACKGROUND:This Phase Ib dose-escalating study investigated safety, maximum tolerated dose (MTD), dose-limiting toxicity (DLT), pharmacokinetics (PK) and clinical antitumour activity of tosedostat (CHR-2797), an orally bioavailable aminopeptidase inhibitor, in combination with paclitaxel. METHODS:A total of 22 patient...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6605917
更新日期:2010-10-26 00:00:00
abstract::High-level microsatellite instability (MSI-H) in colorectal cancer accounts for about 12% of colorectal cancers and is typically associated with a dense infiltration with cytotoxic CD8-positive lymphocytes. The role of regulatory T cells that may interfere with the host's antitumoural immune response in MSI-H colorect...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6604756
更新日期:2008-12-02 00:00:00
abstract:BACKGROUND:Little is known about the effect of participating in a colorectal cancer (CRC) screening programme on quality of life (QOL), neither for participants with a negative nor for those with a positive test result. These findings, however, are important to evaluate the impact of CRC screening. METHODS:Participant...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2012.386
更新日期:2012-10-09 00:00:00
abstract:BACKGROUND:Preoperative radiotherapy (RT) is commonly used to treat localised soft-tissue sarcomas (STS). Hypoxia is an important determinant of radioresistance. Whether antiangiogenic therapy can 'normalise' tumour vasculature, thereby improving oxygenation, remains unknown. METHODS:Two cohorts were prospectively enr...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2014.537
更新日期:2014-12-09 00:00:00
abstract::We assayed methyl-p-hydroxyphenyllactate esterase (MeHPLAase) activity in 63 cases of primary laryngeal squamous cell carcinoma. MeHPLAase activity did not show any correlation with oestrogen, progesterone and epidermal growth factor (EGF) receptor levels. No significant relationship was found between MeHPLAase activi...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1998.210
更新日期:1998-04-01 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2011.270
更新日期:2011-09-06 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6605762
更新日期:2010-07-27 00:00:00
abstract:BACKGROUND:Melatonin reduces the development of breast cancer interfering with oestrogen-signalling pathways, and also inhibits aromatase activity and expression. Our objective was to study the promoters through which melatonin modifies aromatase expression, evaluate the ability of melatonin to regulate cyclooxygenases...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6605336
更新日期:2009-11-03 00:00:00
abstract::The RNASEL gene on chromosome 1q25 has been identified as a prostate cancer susceptibility gene. We screened for RNASEL germline mutations in familial prostate cancer patients, and performed a case-control study to examine the association of specific variants with prostate cancer risk in the Japanese. Three variants w...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6601075
更新日期:2003-08-18 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
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更新日期:2014-08-12 00:00:00
abstract::The lymphocyte marker pattern of non-Hodgkin's lymphoma cells was related to current concepts of lymphoma classification. In a series of 28 lymphomas lymphocyte markers indicated that 2 were of histiocytic origin, 2 were unclassifiable, none were derived from T cells and the remainder were B-cell neoplasms. The immuno...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1977.154
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pub_type: 杂志文章
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更新日期:2011-08-23 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6604698
更新日期:2008-11-04 00:00:00
abstract:BACKGROUND:Identification of promising biomarkers that predict the prognosis of patients with breast cancer is needed. In this study, we hypothesised that the expression of the epithelial-mesenchymal transition-related biomarker plastin3 (PLS3) in peripheral blood could be a prognostic factor in breast cancer. METHODS...
journal_title:British journal of cancer
pub_type: 杂志文章
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更新日期:2015-04-28 00:00:00
abstract:BACKGROUND:Tumours are responsive to temozolomide (TMZ) if they are deficient in O(6)-methylguanine-DNA methyltransferase (MGMT), and mismatch repair (MMR) proficient. METHODS:The effect of TMZ on medulloblastoma (MB) cell killing was analysed with clonogenic survival assays. Expression of DNA repair genes and enzymes...
journal_title:British journal of cancer
pub_type: 杂志文章
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更新日期:2012-10-09 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
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更新日期:1998-07-01 00:00:00
abstract::This phase I study investigated the maximum tolerated dose and pharmacokinetics of a 3-weekly administration of BMS-188797, a paclitaxel derivate, at three dose levels (DLs) (80, 110 and 150 mg m(-2) DL), combined with cisplatin (standard dose 75 mg m(-2)). In 16 patients with advanced malignancies treated, one patien...
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pub_type: 杂志文章
doi:10.1038/sj.bjc.6602886
更新日期:2006-01-16 00:00:00
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journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6600307
更新日期:2002-06-05 00:00:00
abstract::From 1,211 breast cancers, 15 oestrogen receptor (ER) negative-progesterone receptor (PgR) positive breast cancers by conventional dextran coated charcoal steroid binding assays in cytosol were reassessed using Elisa techniques with monoclonal antireceptors antibodies in the cytosolic and nuclear fractions, and immuno...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1992.187
更新日期:1992-06-01 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