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  • Bergqvist, Jenny, et al. (författare)
  • Quantitative real-time PCR analysis and microarray-based RNA expression of HER2 in relation to outcome
  • 2007
  • Ingår i: Annals of Oncology. - : Elsevier BV. - 0923-7534 .- 1569-8041. ; 18:5, s. 845-850
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Our aim was to use quantitative real-time PCR (Q-PCR) and RNA expression profiles (RNA-EPs) to investigate HER2 status in relation to outcome. PATIENTS AND METHODS: Cut-off levels for Q-PCR and RNA-EP were established in relation to immunohistochemistry (IHC) validated by FISH in a test set of frozen tissue samples from 40 primary breast cancers. The HER2 status was subsequently studied in another validation set of 306 tumors, where Q-PCR and RNA-EP results were compared with previously carried out IHC that we had validated by chromogenic in situ hybridization (CISH). RESULTS: Q-PCR and RNA-EP offered similar sensitivity (90% versus 77%), specificity (93% versus 95%), and negative (99% versus 98%) and positive (63% versus 61%) predictive values for HER2 determinations. Analyses of relapse-free survival (RFS) and overall survival on the basis of 5 and 10 years of follow-up indicated equivalent hazard ratios for all three techniques. In contrast to IHC/CISH, both Q-PCR and RNA-EP analyses of HER2 also gave statistically significant results regarding RFS and breast cancer-corrected survival after 10 years of follow-up. CONCLUSION: The use of RNA-EP and Q-PCR to analyze HER2 in frozen and formalin-fixed breast cancer samples may be an alternate approach to IHC in combination with FISH/CISH.
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4.
  • Bjohle, J, et al. (författare)
  • Serum thymidine kinase activity compared with CA 15-3 in locally advanced and metastatic breast cancer within a randomized trial
  • 2013
  • Ingår i: Breast Cancer Research and Treatment. - : Springer Verlag (Germany). - 0167-6806 .- 1573-7217. ; 139:3, s. 751-758
  • Tidskriftsartikel (refereegranskat)abstract
    • The primary objective was to estimate serum thymidine kinase 1 (TK1) activity, reflecting total body cell proliferation rate including cancer cell proliferation, in women with loco regional inoperable or metastatic breast cancer participating in a prospective and randomized study. Secondary objectives were to analyze TK1 in relation to progression-free survival (PFS), overall survival (OS), therapy response and other tumour characteristics, including CA 15-3, widely used as a standard serum marker for disease progression. TK1 and CA 15-3 were analysed in 198 serum samples collected prospectively from women included in the randomized TEX trial between December 2002 and June 2007. TK1 activity was determined by the ELISA based DiviTum (TM) assay, and CA 15-3 analyses was generated with the electrochemiluminescence immunoassay Cobas Elecsys CA 15-3 II. High pre-treatment TK1 activity predicted shorter PFS (10 vs. 15 months p = 0.02) and OS (21 vs. 38 months, p andlt; 0.0001), respectively. After adjustment for age, metastatic site and study treatment TK1 showed a trend as predictor of PFS (p = 0.059) and was an independent prognostic factor for OS, (HR 1.81, 95 % confidence interval (CI) 1.26-2.61, p = 0.001). There was a trend of shortened OS for women with high CA 15-3 (p = 0.054) in univariate analysis, but not after adjustment for the above mentioned covariates. Both TK1 (p = 0.0011) and CA 15-3 (p = 0.0004) predicted response to treatment. There were statistically different distributions of TK1 and CA 15-3 in relation to the site of metastases. TK1 activity measured by DiviTum (TM) predicted therapy response, PFS and OS in loco regional inoperable or disseminated breast cancer. These results suggest that this factor is a useful serum marker. In the present material, a prognostic value of CA 15-3 could not be proven.
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  • Belch, Jill J. F., et al. (författare)
  • Results of the randomized, placebo-controlled clopidogrel and acetylsalicylic acid in bypass surgery for peripheral arterial disease (CASPAR) trial
  • 2010
  • Ingår i: Journal of vascular surgery : official publication, the Society for Vascular Surgery [and] International Society for Cardiovascular Surgery, North American Chapter. - : Elsevier BV. - 0741-5214. ; 52:4, s. 825-833, 833.e1-2
  • Tidskriftsartikel (refereegranskat)abstract
    • The combination of clopidogrel plus ASA did not improve limb or systemic outcomes in the overall population of PAD patients requiring below-knee bypass grafting. Subgroup analysis suggests that clopidogrel plus ASA confers benefit in patients receiving prosthetic grafts without significantly increasing major bleeding risk.
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6.
  • Berger, P., et al. (författare)
  • Validation of the Simulator for Testing and Rating Endovascular SkillS (STRESS)-machine in a setting of competence testing
  • 2010
  • Ingår i: Journal of Cardiovascular Surgery. - 0021-9509 .- 1827-191X. ; 51:2, s. 253-256
  • Tidskriftsartikel (refereegranskat)abstract
    • AIM: Endovascular skills are an integral part of modern-day vascular surgery. The STRESS machine has been developed to test these skills in vascular surgeons. This study aims to define an optimal pass/fail cutoff value for the STRESS test score. METHODS: The STRESS machine consists of a dry glass model of the abdominal aorta and its tributaries with various stenotic lesions, elongations, and tortuosities. A camera and computer software are used to simulate plain fluoroscopy-mode. The test subjects are given two assignments after which two reviewers use a combination of the ICEPS and MRS to produce the final total score; 43 subjects were tested. According to previous endovascular experience, subjects were classified into four groups: novice-low (no experience, less than 11 performed procedures, less than 50 assisted procedures), novice-high (11-25 performed procedures, more than 50 assisted procedures), intermediate (1-10 performed and >11-25 assisted procedures, 11-25 performed and >1-10 assisted procedures or 25-50 performed procedures) and advanced (more than 50 performed procedures). RESULTS: Test-score and noted experience showed a correlation of 0.794. All intermediate and advanced test subjects scored more than 50 points compared to 4 out of 15 novices. CONCLUSION: We demonstrated that it is possible to determine an optimal cut-off value for competence testing with the STRESS machine.
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  • Dahl, O. E., et al. (författare)
  • Major joint replacement. A model for antithrombotic drug development: from proof-of-concept to clinical use
  • 2008
  • Ingår i: International angiology. - 0392-9590. ; 27:1, s. 60-7
  • Tidskriftsartikel (refereegranskat)abstract
    • AIM: Development of antithrombotic compounds has traditionally been performed in patients undergoing total hip and knee replacement surgery. A high number of asymptomatic deep-vein thromboses are radiologically detectable, and bleeding and other adverse events (AE) are easy to observe. However, standardization of study procedures and endpoints in early proof-of-concept studies and late pure clinical endpoint studies has been lacking. This has made comparison between studies difficult, economic analyses speculative and potential benefits of applying the drug regimen in non-selected patients uncertain. In this paper, the International Surgical Thrombosis Forum proposes a strategy for the clinical investigation of new pharmacological agents for the prophylaxis of postoperative thrombotic events. METHODS: First, dose titration safety studies of short duration, in highly selected patients using objective venographic endpoints are recommended. Bleeding should be divided into the quantified volume of surgical bleeding and other adjudicated clinical bleeding events. The number of AE should be described for each dose step and classified according to International Coding of Diagnoses (ICD). Second, a dose confirmatory study of moderate exposure period and sufficient follow-up time is recommended. The exclusion criteria should be restricted to contraindications of the compared drugs and technical procedure. RESULTS: The efficacy, bleeding and AE should be similar to those used in dose-titration studies. In addition, the failure rate of the drug to exert its effect and the net clinical benefit should be calculated. CONCLUSION: Finally, trials with simple clinical endpoints and long follow-up should be conducted to evaluate the potential benefits of the drug-regimen in non-selected populations.
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  • Liapis, C. D., et al. (författare)
  • European continuing medical education in vascular surgery : 5-year results of congresses approved by the Union Européenne des Médecins Spécialistes Section of Vascular Surgery
  • 2007
  • Ingår i: International Journal of Angiology. - 0392-9590 .- 1827-1839. ; 26:4, s. 361-366
  • Tidskriftsartikel (refereegranskat)abstract
    • AIM: Continuing medical education (CME) can be defined as ''educational activities that serve to maintain, develop, or increase the knowledge, skills and professional performance of a physician to provide services for patients, the public, or the profession''. CME is a major professional responsibility. The European Board of Vascular Surgery of the Union Européenne des Médecins Spécialistes (UEMS) Section of Vascular Surgery has, through its European Vascular CME (EVCME) Committee, accredited 74 congresses during the 5-year period from 2000-2004. METHODS: Official evaluation forms were completed by the congress participants for a personal appraisal of the quality of the activities. The data in this manuscript focused on questions that were the most relevant and of the greatest interest to the participants. A statistical analysis of the results was performed utilizing ANOVA and Robust tests of equality of means as well as a posthoc analysis for further investigation, and non parametric Wilcoxon signed ranks test. RESULTS: The educational needs of participants regarding new diagnostic and therapeutic modes were stated as ''important'' and ''extremely important'' in the responses at over 80% in total. Over 75% of the participants answered ''extremely important'' and ''important'' to the question ''how important is evidence-based practice to your practice''. CONCLUSION: This survey indicates that the EVCME approved congresses had a positive impact for the vascular surgeon by updating overall knowledge on vascular surgery; the majority of comments by the participants also indicates that EVCME is fulfilling its aim to bring as much evidence-based practice as possible into the daily work schedule of the surgeon by turning knowledge acquired by CME into performance of the participants.
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