Abstract：
:The ability of 5-aminolaevulinic acid and some of its esterified derivatives to induce porphyrin accumulation has been examined in CaNT murine mammary carcinoma cells growing in culture and as tumours in vivo. Topical or intravenous administration of 5-aminolaevulinic acid-esters to mice bearing subcutaneous tumours produced lower porphyrin levels in the tumour than an equimolar dose of 5-aminolaevulinic acid. Reducing the dose of intravenous hexyl- or benzyl-ALA and topical hexyl-5-aminolaevulinic acid resulted in a dose-dependent reduction in porphyrin accumulation. A number of normal tissues accumulated higher concentrations of porphyrins than tumour tissue following intravenous administration of 5-aminolaevulinic acid-esters. Esterase activity in these normal tissues was greater than that in tumour tissue. In contrast to the situation in vivo, all of the 5-aminolaevulinic acid-esters examined were at least as effective as 5-aminolaevulinic acid when applied to cloned CaNT cells in vitro, with the drug concentration required for maximum porphyrin accumulation varying with ester chain-length. Tumour cells growing in culture released esterase activity into the medium. These findings suggest that the efficacy of 5-aminolaevulinic esters may vary depending on the esterase activity of the target tissue, and suggest caution when interpreting the findings of in vitro studies using these and similar prodrugs.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Tunstall RG,Barnett AA,Schofield J,Griffiths J,Vernon DI,Brown SB,Roberts DJdoi
10.1038/sj.bjc.6600460subject
Has Abstractpub_date
2002-07-15 00:00:00pages
246-50issue
2eissn
0007-0920issn
1532-1827pii
6600460journal_volume
87pub_type
杂志文章abstract：:Monoclonal antibodies 19-9 and C-50 were used to assay the cancer associated tumour antigens CA 19-9 and CA-50 in plasma from patients with confirmed pancreatic cancer, and related to the blood group and Lewis blood cell status. The plasma expressions of CA 19-9 or CA-50 were similar, including cases where the patient...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1990.241
更新日期：1990-07-01 00:00:00
abstract：BACKGROUND:Although salt intake is considered a probable risk factor for gastric cancer, relevant studies have provided heterogeneous results, and the magnitude of the association has not been accurately quantified. METHODS:To quantify gastric cancer risk in relation to dietary salt exposure according to Helicobacter ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6605993
更新日期：2011-01-04 00:00:00
abstract：:Using flow cytometry and immunocytochemistry, we investigated the reactivities of two different murine monoclonal antibodies (MAbs), MRK 16 and MRK 20, specific to adriamycin-resistant K562 cells (K562/ADM) with peripheral human mononuclear cells (MNC) (mainly blastic cells and lymphocytes) from 31 patients with leuka...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1989.309
更新日期：1989-10-01 00:00:00
abstract：:Hypomethylation has been reported to be responsible for the activation of several oncogenes. The possibility that hypomethylation is involved in the regulation of MET transcription was investigated through the analysis of the methylation status of one CpG island containing 43 CpGs in six cases of papillary carcinoma, ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6601988
更新日期：2004-08-16 00:00:00
abstract：:Sublines of a human myeloid leukaemia cell line, KBM-3, with increasing degrees of resistance to the antileukaemic agent 4'-(9-acridinlylamino) methanesulphon-m-anisidide (m-AMSA) were evaluated for their response to this drug using a clonogenic assay to measure cell survival and alkaline elution to assess m-AMSA indu...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1990.11
更新日期：1990-01-01 00:00:00
abstract：BACKGROUND:Type 2 diabetes mellitus and high total cholesterol and triglycerides are known to be associated with increased colorectal cancer risk for the general population. These associations are unknown for people with a germline DNA mismatch repair gene mutation (Lynch syndrome), who are at high risk of colorectal c...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/s41416-019-0580-9
更新日期：2019-11-01 00:00:00
abstract：:The development of an altered stromal microenvironment is a common feature of many tumours including squamous cell carcinoma (SCC), and there is increasing evidence that these changes in the stroma, which include increased expression of proteases and cytokines, may actually promote tumour progression. A common finding...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6601611
更新日期：2004-02-23 00:00:00
abstract：BACKGROUND:Global hypomethylation has been suggested to cause genomic instability and lead to an increased risk of cancer. We examined the association between the global methylation level of peripheral blood leukocyte DNA and breast cancer among Japanese women. METHODS:We conducted a hospital-based case-control study ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2014.223
更新日期：2014-05-27 00:00:00
abstract：:Carboxypeptidase G2, a zinc metalloenzyme isolated from Pseudomonas sp. strain RS-16, which catalyses the hydrolytic cleavage of reduced and non-reduced folates to pteroates and L-glutamate, has been linked to a monoclonal antibody (W14A) raised to human chorionic gonadotrophin. The coupling efficiency and retention o...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1986.62
更新日期：1986-03-01 00:00:00
abstract：:Recent studies have suggested a correlation between the rate and incidence of apoptosis and the radiation response of particular cell lines. However, we found that increasing the rate of induction of apoptosis in the fibroblast line 208F, by transfecting it with human c-myc, did not lead to a change in its clonogenic ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1995.111
更新日期：1995-03-01 00:00:00
abstract：:This study evaluates the overall survival and disease free survival of melanoma patients that were treated with an autologous melanoma cell vaccine, administered as a post-operative adjuvant. Included are 43 patients with totally resected metastatic melanoma (28-AJCC stage III, 15-AJCC stage IV), with a median follow ...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章
doi：10.1038/sj.bjc.6600251
更新日期：2002-05-20 00:00:00
abstract：:Fibroblast growth factors (FGFs) and fibroblast growth factor receptors (FGFRs) have been increasingly recognized to play an important role in the pathobiology of pancreatic malignancy. We have investigated the effects of FGF-1 and FGF-2 on the behaviour and adhesion properties of human pancreatic adenocarcinoma cell ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1054/bjoc.2001.1813
更新日期：2001-06-15 00:00:00
abstract：:The objective of this study was to prospectively measure peri-diagnostic and surgical time intervals for patients with suspected colorectal, lung, or prostate cancer. Prospective eligible patients were referred to a regional hospital in Ottawa, Canada between February 2004 and February 2005 for diagnostic assessment o...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6604819
更新日期：2009-01-13 00:00:00
abstract：:The limited prognosis of patients with castration-resistant prostate cancer (CRPC) on existing hormonal manipulation therapies calls out for the urgent need for new management strategies. The novel, orally available, small-molecule compound, abiraterone acetate, is undergoing evaluation in early clinical trials and em...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/sj.bjc.6604904
更新日期：2009-03-10 00:00:00
abstract：BACKGROUND:The risk and prognosis of ovarian cancer have not been well established in women with endometriosis. Thus, we investigated the impact of endometriosis on the risk and prognosis for ovarian cancer, and evaluated clinicopathologic characteristics of endometriosis-associated ovarian cancer (EAOC) in comparison ...
journal_title：British journal of cancer
pub_type： 杂志文章,meta分析
doi：10.1038/bjc.2014.29
更新日期：2014-04-02 00:00:00
abstract：BACKGROUND:Administration of interleukin-2 (IL-2) has shown some effects on malignant pleural mesothelioma (MPM) tumour regression. The purpose of this study was to investigate the ability of IL-2 to modify immunological effector cells and angiogenesis in MPM patients and their prognostic value. METHODS:Tumour-infiltr...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6605438
更新日期：2009-12-01 00:00:00
abstract：:Clonal subpopulations of different ploidy values and metastatic capacities, isolated from the RIF-1 mouse sarcoma, have been tested for in vitro X-radiation sensitivity, for in vitro sensitivity to adriamycin and for in vitro and in vivo sensitivity to melphalan and CCNU. Following X-radiation, no consistent differenc...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1983.139
更新日期：1983-06-01 00:00:00
abstract：:We present the cytogenetic investigations of five histiocytic tumour lesions from children. In four cases there was a confirmed diagnosis of Langerhans cell histiocytosis (LCH) and one case of histiocytosis that did not fulfil all the criteria for true LCH. All five cases showed cytogenetic abnormalities, including th...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1998.89
更新日期：1998-02-01 00:00:00
abstract：:Measurements of methotrexate have been made in the liver and plasma of 4 patients and in the bile and plasma of 1 patient receiving [(3)H]methotrexate. Projections from a theoretical model of concentration of methotrexate in liver are confirmed but projections of biliary excretion are not. ...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1973.190
更新日期：1973-12-01 00:00:00
abstract：:To investigate the efficacy and safety of combining weekly oxaliplatin with weekly 24-h infusion of high-dose 5-fluorouracil (5-FU) and folinic acid (FA) in treatment of patients with advanced gastric cancer. Patients with histologically confirmed, locally advanced or recurrent/metastatic gastric cancer were studied. ...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1038/sj.bjc.6601985
更新日期：2004-08-02 00:00:00
abstract：:5,6-Dimethylxanthenone-4-acetic acid, synthesised in this laboratory, reduces tumour blood flow, both in mice and in patients on Phase I trial. We used TUNEL (TdT-mediated dUTP nick end labelling) assays to investigate whether apoptosis induction was involved in its antivascular effect. 5,6-Dimethylxanthenone-4-acetic...
journal_title：British journal of cancer
pub_type： 临床试验,杂志文章
doi：10.1038/sj.bjc.6600368
更新日期：2002-06-17 00:00:00
abstract：:Ductal carcinoma in situ (DCIS) now represents 20-25% of all 'breast cancers' consequent upon detection by population-based breast cancer screening programmes. Currently, all DCIS lesions are treated, and treatment comprises either mastectomy or breast-conserving surgery supplemented with radiotherapy. However, most D...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/s41416-019-0478-6
更新日期：2019-08-01 00:00:00
abstract：:Reports are available on the studies of the cell cycle of several normal cell populations and of neoplastic effusions in man and experimental animals in vitro and in vivo at various stages of the growth. In the present work the cell cycle of 5 solid human tumours in vitro and the duration of their various intermitotic...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.1970.32
更新日期：1970-06-01 00:00:00
abstract：BACKGROUND:High amplification of epiregulin (EREG) and amphireglin (AREG) in tumour tissues has been previously reported to be associated with better outcome in metastatic colorectal cancer (mCRC) patients who were treated with anti-EGFR antibodies. Here we investigated associations between the expression of other cand...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2016.74
更新日期：2016-04-26 00:00:00
abstract：:MicroRNAs (miRNAs) are small non-protein-coding RNAs that function as endogenous negative gene regulators. Dysfunctions of miRNAs are frequently found in malignancies, including lung cancer. In this review, we summarise the current understanding of miRNAs in lung cancer tumourigenesis, and highlight their potential in...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/sj.bjc.6605901
更新日期：2010-10-12 00:00:00
abstract：BACKGROUND:Prostate cancer is the most common cancer in British men but its aetiology is not well understood. We aimed to identify risk factors for prostate cancer in British males. METHODS:We studied 219 335 men from the UK Biobank study who were free from cancer at baseline. Exposure data were collected at recruitme...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2017.312
更新日期：2017-11-07 00:00:00
abstract：BACKGROUND:Multiple early gastric cancers (EGCs) may develop in 6-14% of patients even after achieving curative endoscopic submucosal dissection (ESD); however, a useful biomarker for predicting recurrence is not available. The present study investigated whether the expression of CD44 variant 9 (CD44v9), a functional c...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2013.314
更新日期：2013-07-23 00:00:00
abstract：:The origin of metastatic adenocarcinoma lesions can sometimes be difficult to diagnose. The objectives of our study were to establish the cytokeratin staining pattern of primary and metastatic lung and colorectal adenocarcinomas, and to determine if this helps to identify the site of origin of metastatic lesions. We r...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/sj.bjc.6600326
更新日期：2002-06-17 00:00:00
abstract：:Altered expression and activity of proteases is a key event in cancer, particularly in relation to invasion, modification of the extracellular matrix and metastasis. The transmembrane protease, serine 4 (TMPRSS4) is closely related to other cancer-associated proteases, such as hepsin, TMPRSS2 and matriptase. We review...
journal_title：British journal of cancer
pub_type： 杂志文章,评审
doi：10.1038/bjc.2014.403
更新日期：2015-01-06 00:00:00
abstract：BACKGROUND:A decade ago it was reported that childhood cancer incidence was higher in boys than girls in many countries, particularly those with low gross domestic product (GDP) and high infant mortality rate. Research suggests that socio-economic and cultural factors are likely to be responsible. This study aimed to i...
journal_title：British journal of cancer
pub_type： 杂志文章
doi：10.1038/bjc.2012.191
更新日期：2012-06-26 00:00:00
