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3.
  • Aamand Grabau, Dorthe, et al. (författare)
  • The prevalence of immunohistochemically determined oestrogen receptor positivity in primary breast cancer is dependent on the choice of antibody and method of heat-induced epitope retrieval - prognostic implications?
  • 2013
  • Ingår i: Acta Oncologica. - Informa Healthcare. - 0284-186X .- 1651-226X. ; 52:8, s. 1657-1666
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Background. Oestrogen receptor (ER) status is important for the choice of systemic treatment of breast cancer patients. However, most data from randomised trials on the effect of adjuvant endocrine therapy according to ER status are based on the cytosol methods. Comparisons with immunohistochemical methods have given similar results. The aim of the present study was to examine whether different ER antibodies and heat-induced epitope retrieval (HIER) methods influence the prevalence of ER-positivity in primary breast cancer. Material and methods. This study is based on patients included in a clinical trial designed to compare the effect of two years of adjuvant tamoxifen versus no adjuvant systemic treatment in premenopausal women. From 1986 to 1991, 564 patients from two study centres in Sweden were enrolled and randomised. Patients were randomised independently of ER status. In the present study, ER status was assessed on tissue microarrays with the three different ER antibody/HIER combinations: 1D5 in citrate pH 6 (n = 390), SP1 in Tris pH 9 (n = 390) and PharmDx in citrate pH 6 (n = 361). Results. At cut-offs of 1% and 10%, respectively, the prevalence of ER-positivity was higher with SP1 (75% and 72%) compared with 1D5 (68% and 66%) and PharmDx (66% and 62%). At these cut-offs, patients in the discordant groups (SP1-positive and 1D5-negative) seem to have a prognosis intermediate between those of the double-positive and double-negative groups. Comparison with the ER status determined by the cytosol-based methods in the discordant group also showed an intermediate pattern. The repeatability was good for all antibodies and cut-offs, with overall agreement andgt;= 93%. Conclusion. The present study shows that the choice of antibody and HIER method influences the prevalence of ER-positivity. We suggest that this be taken into consideration when choosing a cut-off for clinical decision making.</p>
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4.
  • Abdulla, Maysaa, et al. (författare)
  • A population-based study of cellular markers in R-CHOP treated diffuse large B-cell lymphoma patients
  • 2016
  • Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 55:9-10, s. 1126-1131
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Aim: To determine the prognostic significance of co-expression of MYC, BCL-2 and BCL-6 proteins in combination with other biomarkers and clinical characteristics within a population-based cohort of diffuse large B-cell lymphoma (DLBCL) patients uniformly treated with R-CHOP.</p><p>Patients and methods: The immunohistochemical (IHC) expression of CD10, BCL-2, BCL-6, MUM1, MYC, CD5, CD30, Ki-67 and p53 was evaluated in a retrospective, population-based study comprising 188 DLBCL patients treated with R-CHOP and diagnosed in Sweden between 2002 and 2012.</p><p>Results: Patients had a median age at diagnosis of 64 years (26-85 years) with a male:female ratio of 1.4:1. Approximately half (52%) of the patients presented with an International Prognostic Index (IPI) age adjusted (IPIaa)2. Median follow-up time was 51 months (range 0.4-158) and the five-year lymphoma-specific survival (LSS) was 76%, five-year overall survival (OS) was 65% and five-year progression-free survival (PFS) was 61%. A high Ki-67 value was found in 59% of patients, while p53 overexpression was detected in 12% of patients and MYC, BCL-2 and BCL-6 expression were detected in 42%, 55% and 74% of patients, respectively. IPIaa2 (p=0.002), Ki-6770% (p=0.04) and p53 overexpression50% (p=0.02) were associated with inferior LSS and OS. Co-expression of both MYC (&gt;40%) and BCL-2 (&gt;70%) proteins was detected in 27% of patients and correlated with a significantly inferior LSS (p=0.0002), OS (p=0.009) and PFS (p=0.03). In addition, triple expression of MYC, BCL-2 and BCL-6, also correlated with a significantly inferior LSS (p=0.02).</p><p>Conclusion: Concurrent expression of MYC and BCL-2 proteins, as detected by IHC, was strongly associated with an inferior survival in DLBCL patients treated with R-CHOP. Other markers affecting survival were triple expression of MYC, BCL-2 and BCL-6, IPIaa, high Ki-67 and p53 overexpression.</p>
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6.
  • Ahlin, Cecilia, et al. (författare)
  • Aberrant expression of cyclin E in low-risk node negative breast cancer
  • 2008
  • Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 47:8, s. 1539-1545
  • Tidskriftsartikel (refereegranskat)abstract
    • <p><em>Background.</em> Cyclin E is a cell cycle regulatory protein which occurs in G1, peaks in late G1 and is degraded in early S-phase. Cyclin E overexpression appears to be an independent prognostic factor for overall survival in breast cancer. <em>Material and Methods.</em> Nuclear cyclin A is a reliable marker for S-and G2-phases. Consequently, aberrant expression of cyclin E can be detected by simultaneous immunostainings for cyclin A and cyclin E. Studies have shown that aberrant cyclin E might provide additional prognostic information compared to that of cyclin E alone. This study aimed to investigate cyclin E and aberrant cyclin E expression in low-risk node negative breast cancer. We compared women that died from their breast cancer (n=17) with women free from relapse&gt;8 years after initial diagnosis (n=24). All women had stage I, low risk breast cancer. The groups were matched regarding tumour size, receptor status, adjuvant chemotherapy and tumour differentiation. Tumour samples were analysed regarding expression of cyclin A, cyclin E and double-stained tumour cells using immunoflourescence staining and digital microscopy. <em>Results.</em> No differences were seen regarding expression of cyclin E or aberrant cyclin E in cases compared to controls. <em>Discussion.</em> We conclude that neither cyclin E nor aberrant cyclin E is a prognostic factor in low-risk node negative breast cancer patients.</p>
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7.
  • Ahlström, Håkan, et al. (författare)
  • An experimental model for pharmacokinetic studies of monoclonal antibodies in human colonic cancer
  • 1987
  • Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 26:6, s. 447-451
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>An experimental model consisting of athymic rats carrying human colonic tumours from cell line LS 174T in both hind legs was used. 125I-labelled anti-carcinoembryonic antigen (anti-CEA) monoclonal antibodies were injected intra-arterially (i.a.), either alone (21 rats) or together with degradable starch microspheres (6 rats). As a control, an irrelevant antibody was injected i.a., alone (6 rats) or together with microspheres (3 rats). An intra-arterial injection was given on the side bearing one tumour in each rat, while the contralateral tumour served as an 'intravenous' control. The rats were submitted to external gamma measurements daily for four days. On the fourth day they were killed and pieces from the tumours and from various organs were examined by in vitro measurements. The results indicate strong expression of CEA in LS 174T cells grafted to athymic rats. No lasting enhancement of the tumour uptake was achieved by intra-arterial injection of antibodies as compared with the control tumours.</p>
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8.
  • Ahlström, Håkan, et al. (författare)
  • Enhanced uptake of intra-arterially injected anti-CEA monoclonal antibodies in human colonic cancer after mannitol infusion in an experimental model
  • 1987
  • Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 26:6, s. 453-458
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>In a previous report athymic rats carrying transplanted human colonic tumours from cell line LS 174T in both hind legs were injected intra-arterially (i.a.) with 125I-labelled anti-carcinoembryonic (anti-CEA) monoclonal antibodies. The i.a. injection was given on one side bearing a tumour in each rat, while the contralateral tumour served as an 'intravenous' control. In the same experimental model and treated in the same way, 10 rats were injected i.a. with anti-CEA monoclonal antibodies after an i.a. mannitol infusion. In both groups of rats external gamma measurements were performed daily for four days. On the fourth day the rats were killed and pieces of the tumours and of various organs were weighed and the activity was determined with a gamma-counter. The tumour uptake of antibodies was significantly enhanced after mannitol infusion.</p>
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9.
  • Ahlström, Håkan, et al. (författare)
  • The spatial distribution of parenterally administered monoclonal antibodies against CEA in a human colorectal tumour xenograft
  • 1989
  • Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 28:1, s. 81-86
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>A recently developed experimental model consisting of athymic rats carrying human colonic tumours from the cell line LS 174 T in both hind legs was used. 125I-labelled anti-carcinoembryonic (anti-CEA) monoclonal antibodies were injected either intra-arterially after a bolus injection of mannitol, or intra-peritoneally with or without mannitol. On the fourth day the rats were killed and pieces from the tumours and various organs were measured in a well scintillation counter. Tumour pieces were then submitted to autoradiography and immunohistochemistry for examination of the antibody distribution at the cellular level. In all examined tumours injected with anti-CEA antibodies, most of the antibodies were located in the periphery close to fibrovascular septa. It appears, in addition to the specificity of the antibody for the CEA, that the tumour vascular permeability and anatomy are of utmost importance for tumour targeting in this experimental model with the particular antibody used.</p>
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10.
  • Albrow, Rebecca, et al. (författare)
  • Interventions to improve cervical cancer screening uptake amongst young women : A systematic review
  • 2014
  • Ingår i: Acta Oncologica. - London : Informa Healthcare. - 0284-186X .- 1651-226X. ; 53:4, s. 445-451
  • Forskningsöversikt (refereegranskat)abstract
    • <p><strong>Objectives</strong>. In view of declining screening uptake in young women, this review aims to summarise the available evidence relating to interventions designed to increase cervical screening uptake amongst women aged &lt;= 35 years.</p><p><strong>Methods</strong>. Electronic databases were searched and further articles located by manual searches. Study designs employing a valid comparison group and including women aged &lt;= 35 years published through 2012 were considered. Data was extracted on the uptake from either screening programme statistics or as reported by the study subjects. A narrative synthesis was undertaken for each category of interventions identified.</p><p><strong>Results</strong>. Ninety-two records were screened with 36 articles retrieved for further assessment. Four studies met the inclusion criteria, two of which evaluated more than one intervention. One of the studies evaluated the use of a modified invitation letter and reported no significant increase in uptake compared to a standard invitation. Three studies investigated the use of a reminder letter, with two reporting a positive effect on screening uptake in women aged 24-34. Three studies were included which supported the use of physician and telephone reminders. One study on HPV self-sampling reported a positive effect when compared with a reminder letter.</p><p><strong>Conclusions</strong>. There is a lack of randomised controlled trials designed to specifically address falling cervical screening uptake in amongst young women. Cervical screening programmes need to look beyond the use of invitation/reminders letters in this group of women to develop interventions which attempt to overcome as many barriers to uptake as possible.</p>
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