| 1. |
- Lindahl, Bengt, et al.
(författare)
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Adenocarcinoma Corpus Uteri Stage I-II : Results of a Treatment Programme Based upon Cytometry
- 2009
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Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 29:11, s. 4731-4735
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Tidskriftsartikel (refereegranskat)abstract
- The results of a treatment method on adenocarcinoma corpus uteri stage I-II based upon cytometrically measured DNA ploidy are presented. All patients had a simple hysterectomy. Adjuvant treatment (postoperative vaginal brachytherapy) were given only, to those patients with non-diploid tumours regardless of stage and grade. A total of 1,634 women with endometroid adenocarcinoma corpus uteri stage I-II were included where 1,396 patients were followed-up for at least 5 years or until death and the remaining 238 patients were followed-up 3.5-5 years or until death. By using cytometry only, we identified a low-risk group comprising 83% of the patients (with 52% dead from their disease) and a high-risk group of 17% (with 15.7% dead from their disease). By using grade only (well- and moderately differentiated vs poorly differentiated), the low-risk group comprised 87% of the patients (with 4.6% dead from their disease) and the high-risk group 13% (with 13% dead from their disease). By using stage only (stage Ia and Ib vs stage Ic and II), the low-risk group comprised 78% of the patients (with 3.6% dead from their disease) and the high risk group 22% (with 14.5% dead from their disease). By combining these prognostic parameters, we were able to identify small subgroups with increased mortality rates in need of adjuvant therapy. As ploidy still had a strong prognostic strength regardless of given adjuvant radiotherapy, we do not believe that this treatment was effective. We therefore recommend future research to be directed toward cytostatics as an alternative adjuvant treatment.
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| 2. |
- Agardh, Daniel, et al.
(författare)
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Calcium activation of tissue transglutaminase in radioligand binding and enzyme-linked autoantibody immunoassays in childhood celiac disease.
- 2005
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Ingår i: Clinica Chimica Acta. - : Elsevier BV. - 0009-8981. ; 358:1-2, s. 95-103
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Tidskriftsartikel (refereegranskat)abstract
- Background Conflicting data have been published concerning the effect of calcium on binding of autoantibodies to tissue transglutaminase (tTG) in celiac disease (CD). Methods IgA-tTG and IgG-tTG were measured with radioligand binding assays (RBA) using human recombinant (hr) 35S-tTG produced in lysate of rabbit reticulocytes and with guinea pig (gp) tTG ELISA in 51 CD children (median: 5.7 years) and 35 controls (median: 2.2 years). Assays were performed with and without calcium. Results In hr-tTG RBA, IgA-tTG levels remained unchanged after calcium detecting 50/51 CD children and 1/35 controls (p < 0.0001). IgG-tTG levels decreased with calcium (p < 0.0001) in CD children and detected 48/51 with and 49/51 without calcium as compared to 1/35 controls (p < 0.0001). In gp-tTG ELISA, levels increased with calcium (p < 0.0001) making it possible to detect an additional three to a total of 50/51 with IgA-tTG and 13 to 39/51 CD children with IgG-tTG compared to 4/35 and 8/35 controls (respectively, p < 0.0001). Rabbit reticulocytes displayed calcium-dependent tTG activity. Conclusions Calcium increased binding of IgA-tTG and IgG-tTG in the ELISA test. The reverse effect observed in RBA may be explained by competitive binding between calcium activated native rabbit reticulocyte tTG and hr 35S-tTG. tTG autoantibody assays may need taking calcium into account for accurate diagnostic sensitivity and specificity for CD.
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| 3. |
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| 4. |
- Blirup, Soren, et al.
(författare)
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Protein standardization V: value transfer. A practical protocol for the assignment of serum protein values from a Reference Material to a Target Material.
- 2008
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Ingår i: Clinical Chemistry and Laboratory Medicine. - 1434-6621. ; Sep 1, s. 1470-1479
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Tidskriftsartikel (refereegranskat)abstract
- Abstract We present a practical protocol for the assignment of values to serum proteins in a Target Material using a Reference Material. This protocol is based on the model of Direct Value Transfer between serum matrices and is intended to improve the value assignment of commercial calibrators using the Reference Material CRM 470 (now labeled ERM-DA 470) or similar reference materials. The procedure describes the general as well as the practical principles involved in the value assignment (with examples). The practical transfer protocol is based on multiple assays of 6 dilutions of the Reference Material and 6 dilutions of the Target Material. The transfer protocol requires several measurements a day repeated on several days, an important prerequisite being that all reconstitutions and dilutions are controlled by weighing thus reducing uncertainty in the transfer. In open systems that allow the use of the Reference Material as calibrator and the Target Material as samples, the proportionality of the two materials (the presence or absence of matrix effects) can now be directly assessed by evaluating a single regression plot. If no matrix effects are found, the regression line will pass through zero with a slope equal to the ratio of the concentrations of the two materials. In closed systems, the dedicated commercial calibrator has to be used as such; the Reference Material and the Target Material are now assayed as samples against this calibrator. Two regression plots are therefore obtained; if no matrix effects are present among the two materials and the calibrator, both the Reference and Target Materials will show zero intercepts, and the ratio of the two slopes will equal the ratio of the concentrations. Clin Chem Lab Med 2008;46.
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| 5. |
- Dahlbom, Ingrid, et al.
(författare)
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Protein A and protein G ELISA for the detection of IgG autoantibodies against tissue transglutaminase in childhood celiac disease
- 2008
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Ingår i: Clinica Chimica Acta. - : Elsevier BV. - 0009-8981 .- 1873-3492. ; 395:1-2, s. 72-6
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: To investigate if the detection of celiac disease (CD) in children was improved by using alternative conjugates for assessment of tissue transglutaminase (tTG) autoantibodies. Methods: Serum samples from 108 biopsy confirmed CD children and 42 control subjects were investigated for the presence of autoantibodies with tTG coated microplates using protein A (PA), protein G (PG), anti-IgG, or anti-IgA as conjugates. Results: Of the 108 CD children, 86 (80%) were IgG-tTG positive, 91 (84%) were positive with the PA-conjugate, 94 (87%) were positive with the PG-conjugate, and 103 (95%) were IgA-tTG positive. Among the 42 controls. 4 (10%) were IgG-tTG positive, 5 (12%) were positive with both the PA- and PG conjugates. whereas 3 (7%) were IgA-tTG positive. Compared with IgG-tTG the concordance was 93% for PA and 95% for PG, with a positive correlation between antibody levels (r=0.967 and r=0.975. p< ;0.0001). All but one CD child were found positive by combining IgG-tTG and IgA-tTG detection. Conclusions: The sensitivity of IgG-tTG detection with ELISA increased by protein A or protein G conjugates, whereas the specificity was reduced as compared with anti-IgG conjugate. The combined measurement of IgA-tTG and IgG-tTG still seems to be the optimal procedure when screening children for CD.
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| 7. |
- Dullaart, Robin P. F., et al.
(författare)
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Plasma apolipoprotein M is reduced in metabolic syndrome but does not predict intima media thickness
- 2009
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Ingår i: Clinica Chimica Acta. - : Elsevier BV. - 0009-8981. ; 406:1-2, s. 129-133
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Tidskriftsartikel (refereegranskat)abstract
- Background: Apolipoprotein (apo) M may exert anti-atherogenic properties in experimental studies. Its hepatic gene expression may be linked to glucose and lipid metabolism. Plasma apoM is decreased in obese mouse models. We hypothesized that plasma apoM is lower in metabolic syndrome (MetS) subjects, and determined whether intima media thickness (IMT) is associated with apoM. Methods: In 19 non-diabetic subjects with and 60 non-diabetic subjects without MetS (NCEP, ATP III criteria), the relationships of plasma apoM with obesity, glucose, insulin, lipids and adipokines, as well as with IMT were determined. Results: Plasma apoM was on average 15% lower in subjects with MetS compared to subjects without MetS (p=0.036). ApoM correlated inversely with body mass index and waist circumference (p<0.001), and positively with total cholesterol, LDL cholesterol and apoA-I (p<0.05). ApoM was not significantly correlated with glucose, insulin, leptin, adiponectin or resistin (p>0.20). Age- and sex adjusted IMT was lower in subjects with MetS (p<0.05), but was unrelated to apoM (p=0.68). In a multiple linear regression model that included the presence of both MetS and apoM, IMT was only related to MetS (p=0.05). Conclusions: Plasma apoM is reduced in MetS. In this study, apoM did not predict subclinical atherosclerosis. (C) 2009 Elsevier B.V. All rights reserved.
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