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- Carlsson, Lena, et al.
(författare)
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Association of cystatin C with prostasomes in human seminal plasma
- 2011
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Ingår i: International Journal of Andrology. - : Wiley. - 0105-6263 .- 1365-2605. ; 33:4, s. 363-368
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Tidskriftsartikel (refereegranskat)abstract
- It was recently elucidated that cystatin C, a protein targeted to the classical secretory pathway by its signal peptide sequence, can also be secreted in association with exosomes. Accordingly, we wanted to investigate whether there is a secretory link between cystatin C and prostasomes in human seminal plasma. Cystatin C concentrations in seminal plasma from 50 men including 6 vasectomized men were measured by turbidimetry on an Architect Ci8200. Some of the seminal plasma samples were also analysed utilizing an Epics Profile XL-MCL cytometer. We found high concentrations of cystatin C in seminal plasma. The 2.5-97.5 percentiles, performed by bootstrap estimation, were 25.8 [95% confidence interval (CI): 22.3-29.4] to 77.0 mg/L (95% CI: 71.9-82.1). Cystatin C is present in approximately 50 times higher concentration in seminal plasma compared with blood plasma. There was no clear difference as regards seminal plasma content of cystatin C between vasectomized men and the rest of the group. Immunoblot analysis with chicken anti-cystatin C antibody revealed a firm association of cystatin C with prostasomes. Flow cytometric analysis demonstrated that cystatin C was linked to prostasomes also meaning an at least partial prostasomal membrane surface localization.
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- Eriksson, M, et al.
(författare)
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Relationship between plasma fibrinogen and coronary heart disease in women
- 1999
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Ingår i: Arteriosclerosis, Thrombosis and Vascular Biology. - Karolinska Hosp, Dept Cardiol, S-10401 Stockholm, Sweden. Karolinska Hosp, Dept Clin Chem, S-10401 Stockholm, Sweden. Karolinska Inst, Natl Inst Psychosocial Factors & Hlth, Stockholm, Sweden. Deaconess Hosp, Inst Prevent Cardiovasc Dis, Boston, MA USA. : LIPPINCOTT WILLIAMS & WILKINS. - 1079-5642 .- 1524-4636. ; 19:1, s. 67-72
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Tidskriftsartikel (refereegranskat)abstract
- Plasma fibrinogen is an independent risk factor for coronary heart disease (CHD) in men; however, its role in women is less clear. We examined the ability of plasma fibrinogen to predict CHD in a community-based, case-control study of women aged 65 years or younger living in the greater Stockholm area. Cases were all patients hospitalized for an acute coronary event between February 1991 and February 1994. Controls were randomly selected from the city census and were matched to cases by age and catchment area. Plasma fibrinogen was measured 3 to 6 months after hospitalization by using a fibrinogen assay based on fibrinogen polymerization time measurement. Of the 292 consecutive cases, 110 (37%) were hospitalized for an acute myocardial infarction and 182 (63%) for angina pectoris. The mean age+/-SD in both patients and controls was 56+/-7 years. Mean levels of plasma fibrinogen in patients and controls were 3.66+/-0.81 and 3.25+/-0.64 g/L (P<0.0001), respectively. The age-adjusted odds ratio (OR) for CHD in the highest versus the lowest quartile of plasma fibrinogen was 6.0 (95% confidence interval [CI], 3.5 to 10.4). After adjustment for age, cigarette smoking, body mass index, systolic blood pressure, total cholesterol, high density lipoprotein cholesterol, triglycerides, and educational level, the OR was 3.0 (95% CI, 1.6 to 5.5). Further adjustment for C-reactive protein yielded the same result. In both premenopausal and postmenopausal women, the multivariate adjusted ORs were 7.0 (95% CI, 1.8 to 28.3) and 2.1 (95% CI, 1.0 to 4.4), respectively. These results provide evidence that plasma fibrinogen is associated with an excess risk of CHD in women.
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- Inayat, S, et al.
(författare)
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High levels of cathepsins B, L and S in human seminal plasma and their association with prostasomes
- 2012
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Ingår i: Andrologia. - : Hindawi Limited. - 0303-4569 .- 1439-0272. ; 44:6, s. 423-427
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Tidskriftsartikel (refereegranskat)abstract
- Semen is a heterogenous and complex fluid with different functions, some of them well known, others still obscure. The aim of this study was to investigate the presence of cathepsins B, S and L in human seminal plasma and their possible associations with other semen variables. Cathepsin B, L and S concentrations were measured in seminal plasma from 99 men utilising commercial ELISA kits. Seminal plasma cathepsin B was approximately 70 times higher, while the cathepsin L values were approximately 500 times higher and the cathepsin S values approximately 40 times higher in seminal plasma than in a group of serum samples. The study shows that seminal plasma contains high levels of cathepsins B, L and S. All three cathepsins were also bound to the surface of prostasomes.
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- Jaconbson, SH, et al.
(författare)
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Correlation between soluble markers of endothelial dysfunction in patients with renal failure
- 2002
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Ingår i: American journal of nephrology. - : S. Karger AG. - 0250-8095 .- 1421-9670. ; 22:1, s. 42-47
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Tidskriftsartikel (refereegranskat)abstract
- <i>Aim:</i> Damage to the endothelium is an important component of atherosclerosis. It has been suggested to be quantified by measuring plasma markers, such as von Willebrand factor and thrombomodulin and soluble adhesion molecules. We hypothesized there may exist a correlation between the plasma levels of von Willebrand factor and thrombomodulin as markers of endothelial cell dysfunction and the serum concentrations of soluble adhesion molecules and monocyte chemoattractant protein-1 (MCP-1) in patients with renal insufficiency, and in patients on peritoneal dialysis or hemodialysis since these three groups of kidney patients are highly prone to develop cardiovascular diseases. <i>Results:</i> The concentrations of von Willebrand factor and thrombomodulin in plasma were significantly higher in patients with kidney diseases as compared to healthy subjects (p = 0.017 and p < 0.001, respectively). The patients also had significantly higher concentrations of soluble vascular cell adhesion molecule-1 (sVCAM-1) and MCP-1 compared to healthy controls (p < 0.001 for both comparisons). There were strong correlations between the concentration of soluble intercellular adhesion molecule-1 (sICAM-1) and von Willebrand factor in patients with kidney failure (r = 0.63, p < 0.001) and between the concentration of thrombomodulin and sVCAM-1 (r = 0.61, p < 0.001). Furthermore, a negative correlation was observed between the concentration of thrombomodulin and the cell surface expression of CD11b on monocytes and granulocytes in the peripheral circulation (p < 0.01 in both cases). <i>Conclusion:</i> The strong correlation between markers of endothelial dysfunction and soluble adhesion molecules in patients with renal insufficiency and on dialysis strengthen the view that an ongoing stress on endothelial cells is present in this group of patients. This may play a pathophysiological role in the development of cardiovascular disease.
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- Koul, Bansi, et al.
(författare)
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Twenty-four-hour heparin-free veno-right ventricular ECMO: an experimental study
- 1992
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Ingår i: Annals of Thoracic Surgery. - 1552-6259. ; 53:6, s. 1046-1051
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Tidskriftsartikel (refereegranskat)abstract
- Platelets and coagulation factors were studied during 24-hour heparin-free veno-right ventricular extracorporeal membrane oxygenation (ECMO) in 6 healthy pigs. An endpoint attached and covalently bonded heparin-coated ECMO system was used in these experiments. The veno-right ventricular ECMO supplied the total lung function of the animals, and after 24 hours, all the animals were successfully weaned from ECMO. Lung function and central hemodynamics were not affected by the procedure. Because all the animals showed a significant reduction in plasma volume, the concentration of measured coagulation variables was corrected both for plasma volume changes and for hemodilution. The platelet count and the plasma-free hemoglobin level were not significantly altered by ECMO. Similarly, the prothrombin complex, antithrombin, thrombin-antithrombin complex, factor XII, and the urinary excretion of 2,3-dinor-thromboxane B2 were not significantly altered. Fibrinogen and fibrin monomer increased significantly, whereas von Willebrand factor was significantly decreased after ECMO. In summary, 24-hour heparin-free veno-right ventricular total extracorporeal lung assistance does not affect the platelets and the coagulation system significantly in healthy juvenile pigs.
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