Abstract:
:In recent years, large discrepancies were described in the success rate of the tyrosinase reverse transcription polymerase chain reaction (RT-PCR) for detecting melanoma cells in the peripheral blood of melanoma patients. We present a quality control study in which we analysed the reproducibility of detection of tyrosinase and MART-1 transcripts in 106 blood samples from 68 melanoma patients (mainly stages III and IV). With this study, we aimed to improve insight in the reproducibility of a RT-PCR for the detection of (minimal) amounts of circulating melanoma cells. We performed two reverse transcriptions on each mRNA sample and performed tyrosinase and MART-1 nested PCRs in duplicate per cDNA sample. Thus, four tyrosinase and four MART-1 measurements were performed per blood sample. In our study, the majority of blood samples was negative for tyrosinase (80%) or MART-1 (66%). Only four samples were positive in all four determinations for tyrosinase and seven for MART-1. Variable results (1-3 times positive results) were obtained for tyrosinase and MART-1 in 16% and 27% respectively. MART-1 PCR had a better performance than tyrosinase PCR. Sensitivity increased when both markers were used. We reasoned that the low number of melanoma marker PCR-positive blood samples can be explained by differences in mRNA quality. By using real-time quantitative PCR, we found that this was not the case: amplification of porphobilinogen deaminase (PBGD), a low copy household gene, was not different in blood samples in which a melanoma marker was not detected from groups in which this marker was detected more or less consistently (1-4 times). When applying real-time quantitative PCR for tyrosinase and MART-1, we found that a low amount of SK-MEL-28 cell equivalents was present in the blood of melanoma patients, with a higher number of equivalents in the group with a consistently positive result. We conclude that low reproducibility of a repeated assay for the detection of circulating melanoma cells is not caused by differences in mRNA quality between the samples, but due to low numbers of amplifiable target mRNA molecules in the mRNA sample. Use of more than one marker and repetition of the assay will increase the probability of finding positive PCR results.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
de Vries TJ,Fourkour A,Punt CJ,van de Locht LT,Wobbes T,van den Bosch S,de Rooij MJ,Mensink EJ,Ruiter DJ,van Muijen GNdoi
10.1038/sj.bjc.6690436subject
Has Abstractpub_date
1999-05-01 00:00:00pages
883-91issue
5-6eissn
0007-0920issn
1532-1827journal_volume
80pub_type
杂志文章abstract::This study evaluates the efficacy of capecitabine using data from a large, well-characterised population of patients with metastatic colorectal cancer (mCRC) treated in two identically designed phase III studies. A total of 1207 patients with previously untreated mCRC were randomised to either oral capecitabine (1250 ...
journal_title:British journal of cancer
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1038/sj.bjc.6601676
更新日期:2004-03-22 00:00:00
abstract::The incidence of colorectal carcinoma is rising at an alarming pace in Asian urban societies such as Hong Kong. Detailed examination of the epidemiological pattern and genetic mutation of colorectal cancer in the Hong Kong Chinese population is overdue. We compared the reported age incidence of colorectal carcinoma in...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1997.605
更新日期:1997-01-01 00:00:00
abstract::The fluorometric microculture cytotoxicity assay (FMCA) was employed for analysing the effect of different chemotherapeutic drug combinations and their single constituents in 44 cases of acute myelocytic leukaemia (AML). A large heterogeneity with respect to cell kill was observed for all combinations tested, the inte...
journal_title:British journal of cancer
pub_type: 临床试验,杂志文章
doi:10.1038/bjc.1993.178
更新日期:1993-05-01 00:00:00
abstract::Urethane was found to be uniformly distributed in all the major organs of foetal, young and adult ICR/Jcl mice and then to disappear rapidly as measured by the incorporation of urethane-carbonyl-14C, thus permitting the accurate comparison of tumour susceptibility of cells in various organs of mice at different ages. ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1976.83
更新日期:1976-05-01 00:00:00
abstract:BACKGROUND:Soft tissue sarcomas are heterogeneous and a major complication in their management is that the existing classification scheme is not definitive and is still evolving. Leiomyosarcomas, a major histologic category of soft tissue sarcomas, are malignant tumours displaying smooth muscle differentiation. Althoug...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2016.280
更新日期:2016-10-11 00:00:00
abstract::Serum samples taken between 6 and 20 weeks of gestation were obtained from 28 mothers who gave birth to cryptorchid sons (cases) and from 108 control mothers. In comparison with controls the cases had 10% higher geometric mean oestradiol (95% CI -13% to +39%: P=0.42) and 10% lower geometric mean testosterone (95% CI -...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1996.121
更新日期:1996-03-01 00:00:00
abstract::The modulating effect of 43 degrees C hyperthermia on the induction of oncogenic transformation by the antineoplastic agents, actinomycin D, mitomycin C, and 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) was examined using the C3H 10T1/2 cell line. For any given level of cytotoxicity, cells exposed to the three chemothe...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1988.9
更新日期:1988-01-01 00:00:00
abstract:BACKGROUND:The Dutch guidelines advise to start radiation therapy (RT) within 5 weeks following breast-conserving surgery (BCS). However, much controversy exists regarding timing of RT. This study investigated its effect on 10-year disease-free survival (DFS) in a Dutch population-based cohort. METHODS:All women diagn...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2017.159
更新日期:2017-07-11 00:00:00
abstract::The aim of this study was to determine the dose-limiting toxicity (DLT) and establish the recommended dose for mitomycin C added every 3 weeks to the standard combination dose of capecitabine. Cohorts of at least three patients with pretreated gastrointestinal carcinoma received capecitabine 1000 mg m(-2) orally twice...
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.6602025
更新日期:2004-08-31 00:00:00
abstract:BACKGROUND:Vascular endothelial growth factor receptor-3 (VEGFR-3) signalling mediates lymphangiogenesis and lymphatic invasion; however, the effect of VEGFR-3 inhibition on the lymph node (LN) metastasis remains unclear. The aim of this study is to clarify the benefit of a VEGFR-3 inhibitor Ki23057 for LN metastasis. ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6605296
更新日期:2009-10-06 00:00:00
abstract::The feasibility of combination irinotecan, carboplatin and docetaxel chemotherapy as first-line treatment for advanced epithelial ovarian carcinoma was assessed. One hundred patients were randomised to receive four 3-weekly cycles of carboplatin (area under the curve (AUC) 7) followed by four 3-weekly cycles of doceta...
journal_title:British journal of cancer
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1038/sj.bjc.6602910
更新日期:2006-01-16 00:00:00
abstract::Temozolomide, an imidazotetrazine derivative, was given to 18 patients with low-grade non-Hodgkin's lymphoma (NHL) at a dose of 750 mg m-2 orally, divided over five consecutive days, escalated to 1000 mg m-2 over 5 days (i.e. 200 mg m-2 day-1) if no significant myelosuppression was noted at day 22 of the 28 day cycle....
journal_title:British journal of cancer
pub_type: 临床试验,杂志文章
doi:10.1038/bjc.1995.299
更新日期:1995-07-01 00:00:00
abstract:BACKGROUND:Colorectal cancer (CRC) diagnoses and disease-specific survival (DSS) vary between ethnic groups in the United States. However, few studies have assessed differences among Asian subgroups. METHODS:The Surveillance, Epidemiology, and End Results (SEER) database was used to identify patients with invasive CRC...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2013.97
更新日期:2013-04-16 00:00:00
abstract:BACKGROUND:Tumours consist of heterogeneous cancer cells and are likely to contain drug-tolerant cell subpopulations, causing early relapse. However, treatment strategies to eliminate these cells have not been established. METHODS:We established gastric cancer patient-derived cells (PDCs) to examine the contribution o...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/s41416-019-0600-9
更新日期:2019-11-01 00:00:00
abstract::Epidemiology has shown an association between exposure to extremely low frequency (ELF) electromagnetic fields (EMF) and childhood leukaemia. The causal nature and biological basis of this association are however questionable. Studies with aneuploid cell lines raised the hypothesis that ELF EMF may act as a coleukaemo...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6601010
更新日期:2003-06-16 00:00:00
abstract:BACKGROUND:RECORD-3 assessed non-inferiority of progression-free survival (PFS) with everolimus vs sunitinib in previously untreated patients with metastatic renal cell carcinoma. Baseline plasma sample collection and randomised design enabled correlation of circulating biomarkers with efficacy. METHODS:Samples were a...
journal_title:British journal of cancer
pub_type: 杂志文章,随机对照试验
doi:10.1038/bjc.2016.21
更新日期:2016-03-15 00:00:00
abstract:BACKGROUND:Tongue squamous cell carcinoma (TSCC) is increasing in incidence, especially among young patients and preferably females. Infection with human papilloma virus (HPV) has been suggested as a cause of SCC in the head and neck, and the proportion of oropharyngeal cancers caused by HPV has steadily increased. ME...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2015.207
更新日期:2015-07-14 00:00:00
abstract:BACKGROUND:Our previous laboratory and clinical data suggested that one mechanism underlying the development of platinum resistance in ovarian cancer is the acquisition of DNA methylation. We therefore tested the hypothesis that the DNA hypomethylating agent 5-aza-2'-deoxycytodine (decitabine) can reverse resistance to...
journal_title:British journal of cancer
pub_type: 杂志文章,随机对照试验
doi:10.1038/bjc.2014.116
更新日期:2014-04-15 00:00:00
abstract:BACKGROUND:Cytochrome P450 2D6 (CYP2D6) has a crucial role in the metabolic conversion of tamoxifen into the active metabolite endoxifen. In this cohort study, the effect of CYP2D6-predicted phenotype, defined as the combined effect of CYP2D6 genetic variation and concomitant use of CYP2D6-inhibiting medication, on tim...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/sj.bjc.6605800
更新日期:2010-09-07 00:00:00
abstract::One hundred resected cases of squamous cell carcinomas of the oesophagus were reviewed and a series of histological criteria related to the survival time. Two histological features were important in the assessment of survival. Good prognostic factors were a marked lymphocytic response to the tumour and a lack of intra...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1989.87
更新日期:1989-03-01 00:00:00
abstract::Our purpose was to determine the response rate and median and overall survival of gemcitabine as monotherapy versus gemcitabine plus irinotecan in advanced or metastatic pancreatic cancer. Patients with histologically or cytologically confirmed adenocarcinoma who were chemotherapy and radiotherapy naive were enrolled....
journal_title:British journal of cancer
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1038/sj.bjc.6603301
更新日期:2006-09-04 00:00:00
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 int...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1997.408
更新日期:1997-01-01 00:00:00
abstract::Cultured cells maintained in very low oxygen levels alter their structure, metabolism and genetic expression. Culture conditions for cells were modified to minimise variation of nutrients and to allow normal survival levels after 24 h of hypoxic exposure. Under these hypoxic conditions, glucose consumption and lactate...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1990.264
更新日期:1990-08-01 00:00:00
abstract:BACKGROUND:When tumour tissue is unavailable, cell-free DNA (cfDNA)can serve as a surrogate for genetic analyses. Because mutated alleles in cfDNA are usually below 1%, next-generation sequencing (NGS)must be narrowed to target only clinically relevant genes. In this proof-of-concept study, we developed a panel to use ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2017.8
更新日期:2017-03-14 00:00:00
abstract:BACKGROUND:Previous studies on the effects of different prostate cancer treatments on quality of life, were confounded because patients were not comparable. This study examined treatment effects in more comparable groups. METHODS:From 2008-2011, 240 patients with localised prostate cancer were selected to be eligible ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2013.181
更新日期:2013-05-14 00:00:00
abstract::In rats a maximal tolerated dose of carboplatin (60 mg kg-1, i.v.) caused severe anaemia, leucopenia and thrombocytopenia. These indices of haematological toxicity were also observed with a maximal tolerated dose of cis-platin (6.5 mg kg-1, i.v.), but reductions in blood cell counts were less than those observed with ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1987.75
更新日期:1987-04-01 00:00:00
abstract::Ordinary lipomas are cytogenetically characterized by a variety of balanced rearrangements involving chromosome segment 12q13-15, whereas well differentiated liposarcomas (WDL) show supernumerary ring and giant marker chromosomes, known to contain amplified 12q sequences. The tight correlation between the presence of ...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1054/bjoc.1999.1090
更新日期:2000-04-01 00:00:00
abstract::The effect of selected marine compounds with anti-tumoral activity on the cell microtubule network was tested by immunofluorescence analyses, or by other in vitro analyses involving competition with colchicine or with GTP for tubulin binding and tubulin polymerisation, studies that were carried out in parallel with ot...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1996.176
更新日期:1996-04-01 00:00:00
abstract:BACKGROUND:Panobinostat, a pan-deacetylase inhibitor, overcomes imatinib resistance in preclinical models of gastrointestinal stromal tumours (GIST). Here we determined the maximum tolerated dose (MTD) and dose-limiting toxicities (DLT) of panobinostat in combination with imatinib (IM) for treatment of patients with re...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.2013.826
更新日期:2014-03-04 00:00:00
abstract::Plasma concentrations of certain hormones linked to breast cancer risk were measured in age-pooled samples from 3,250 rural Chinese women in 65 counties, and 300 British women, all aged 35-64. In age-groups 35-44, 45-54 and 55-64 respectively, mean oestradiol concentrations were 36% (P = 0.043), 90% (P less than 0.001...
journal_title:British journal of cancer
pub_type: 杂志文章
doi:10.1038/bjc.1990.344
更新日期:1990-10-01 00:00:00