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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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