Effect of a Moderate Fish Intake on Haemostatic Parameters in Healthy Males

1989 ◽  
Vol 61 (03) ◽  
pp. 468-473 ◽  
Author(s):  
A D Muller ◽  
A C v Houwelingen ◽  
M C E van Dam-Mieras ◽  
B M Bas ◽  
G Hornstra
Keyword(s):  
Intervention Study ◽  
Dietary Intervention ◽  
Antithrombin Iii ◽  
Experimental Period ◽  
Procoagulant Activity ◽  
Factor Vii ◽  
Factor X ◽  
Activated Factor Vii ◽  
Von Willebrand ◽  
Willebrand Factor

SummaryThis article describes the results of a dietary intervention study performed in three different centers. In the study the effect of a diet enriched with fish on the coagulation tendency of blood was investigated. Two groups of 40 volunteers were given a dietary supplement consisting of 135 g of canned mackerel or meat paste (control) for a 6 weeks period.Compliance, monitored by measuring the urinary excretion of lithium, added to the supplements, was about 80%. Before, during and at the end of the experimental period a number of hemostatic parameters, reflecting the coagulation tendency of blood and the procoagulant activity of monocytes, were measured.The fish supplement did not cause a significant effect on the prothrombin time and on the levels of factor VII, activated factor VII, antithrombin III, von Willebrand factor, fibrinogen, plasminogen and a2-antiplasmin. A slight but transient prolongation in the activated partial thromboplastin time was observed as well as a significant increase in the factor X level, which became more pronounced with prolongation of the experimental period; no activated factor X was found.A tendency towards a stimulation of monocyte procoagulant activity was noticed.

scholarly journals Activation of human factor VII by activated factors IX and X

Blood ◽  
1982 ◽  
Vol 60 (5) ◽  
pp. 1143-1150 ◽  
Author(s):  
DR Masys ◽  
SP Bajaj ◽  
SI Rapaport
Keyword(s):  
Human Factors ◽  
Factor Viii ◽  
Active Site ◽  
Human Factor ◽  
Antithrombin Iii ◽  
Factor Ix ◽  
Factor Vii ◽  
Activate Factor ◽  
Factor X ◽  
Activated Factor Vii

Factor VII clotting activity increases about five-fold when blood is clotted in glass. Prior studies suggested that this results from activation induced by activated factor IX (IXa). However, in purified systems containing phospholipid and calcium, activated factor X (Xa) is known to activate factor VII rapidly. Therefore, we studied activation of factor VII by IXa and X, in systems using purified human factors. Concentrations of IXa and Xa were calculated from total activated protein concentrations rather than from active site concentrations. In the presence of phospolipid and calcium, both IXa and Xa activated factor VII 25-fold; however, Xa was roughly 800 times more efficient than IXa. Without added phospholipid, activation of factor VII by both Xa and IXa was markedly slowed, and Xa was roughly 20 times more efficient than IXa. When both phospholipid and calcium were omitted, activation of factor VII by either enzyme was negligible. Adding normal prothrombin, but not decarboxylated prothrombin, substantially slowed activation of factor VII by both Xa and IXa. Adding thrombin-activated factor VIII and antithrombin-III did not change rates of factor VII activation by either enzyme. These results from purified systems do not provide an explanation for the prior data from plasma systems.

Hemostasis Abnormalities in Patients with Vascular Dementia and Alzheimer’s Disease

1996 ◽  
Vol 75 (02) ◽  
pp. 216-218 ◽  
Author(s):  
D Mari ◽  
L Parnetti ◽  
R Coppola ◽  
B Bottasso ◽  
G P Reboldi ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Vascular Dementia ◽  
Vascular Disease ◽  
Von Willebrand Factor ◽  
Plasminogen Activator Inhibitor ◽  
Factor Vii ◽  
Activated Factor Vii ◽  
Von Willebrand ◽  
Willebrand Factor

SummarySince it has not been established to what extent abnormalities of hemostasis contribute to the occurrence and development of dementia, selected measurements of coagulation and fibrinolysis were obtained in elderly patients with Alzheimer’s disease (n = 22) or vascular dementia (n = 29), compared with healthy individuals in the same age range (n = 61). Hemostasis abnormalities were more frequent and marked in vascular dementia, being expressed as significant increases of plasminogen activator inhibitor type 1, von Willebrand factor, D-dimer. and activated factor VII. However, some hemostasis measurements (von Willebrand factor, activated factor VII) were abnormally high also in the patients with Alzheimer’s disease, a condition in which vascular damage is not considered to play a major pathogenetic role. It could not be established in this study whether or not these hemostatic abnormalities play a causal role in the pathogenesis of dementia, or whether they are secondary to inflammation and chronic vascular disease. Nevertheless, their presence may contribute to aggravating vascular disease.

Factor VIII Structure and Function: Progress and Problems

1979 ◽  
Author(s):  
T.S. Zimmerman
Keyword(s):  
Factor Viii ◽  
Von Willebrand Factor ◽  
Bleeding Time ◽  
Procoagulant Activity ◽  
Factor Vii ◽  
Serine Esterase ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Ristocetin Cofactor

The last several years have seen considerable progress in our understanding of Factor VIII. Factor VIII has been shown to exist in vitro as different size multimers of the 200,000 MW subunit. The von Willebrand “bleeding time” factor appears to reside in the larger multimers whereas the Factor VIII procoagulant activity is associated with all of the different size forms. It has been suggested that this size heterogeneity results from in vitro changes. The role of carbohydrate in the Factor VIII von Willebrand function has been the subject of considerable study. It is clear that altering the carbohydrate composition of the Factor VIII molecule reduces or abolishes its ristocetin cofactor. Initial studies of Factor VIII carbohydrate in von Willebrand's disease showed it to be decreased. However, more recent studies of larger numbers of patients showed normal carbohydrate content in the great majority, even in those who lack von Willebrand factor activity. The ristocet in cofactor test has been of great help in defining relationships of the von Willebrand factor to factor VIII procoagulant activity yet the ability of ristocetin cofactor activity to truly reflect the bleeding time abnormality is open to question. The relationship of the Factor VII procoagulant activity to the Willebrand factor also remains a subject of controversy. Though Factor VIII procoagulant activity can clearly be separated from the von Willebrand factor in vitro, the in vivo relationship is unclear. Recent evidence has suggested that Factor VIII procoaguJant activlly may function as a serine esterase. However, the precise manner in which Factor VIII procoagulant activity exerts clot promoting functions is still a mystery.

scholarly journals Activation of human factor VII by activated factors IX and X

Blood ◽  
1982 ◽  
Vol 60 (5) ◽  
pp. 1143-1150 ◽  
Author(s):  
DR Masys ◽  
SP Bajaj ◽  
SI Rapaport
Keyword(s):  
Human Factors ◽  
Factor Viii ◽  
Active Site ◽  
Human Factor ◽  
Antithrombin Iii ◽  
Factor Ix ◽  
Factor Vii ◽  
Activate Factor ◽  
Factor X ◽  
Activated Factor Vii

Abstract Factor VII clotting activity increases about five-fold when blood is clotted in glass. Prior studies suggested that this results from activation induced by activated factor IX (IXa). However, in purified systems containing phospholipid and calcium, activated factor X (Xa) is known to activate factor VII rapidly. Therefore, we studied activation of factor VII by IXa and X, in systems using purified human factors. Concentrations of IXa and Xa were calculated from total activated protein concentrations rather than from active site concentrations. In the presence of phospolipid and calcium, both IXa and Xa activated factor VII 25-fold; however, Xa was roughly 800 times more efficient than IXa. Without added phospholipid, activation of factor VII by both Xa and IXa was markedly slowed, and Xa was roughly 20 times more efficient than IXa. When both phospholipid and calcium were omitted, activation of factor VII by either enzyme was negligible. Adding normal prothrombin, but not decarboxylated prothrombin, substantially slowed activation of factor VII by both Xa and IXa. Adding thrombin-activated factor VIII and antithrombin-III did not change rates of factor VII activation by either enzyme. These results from purified systems do not provide an explanation for the prior data from plasma systems.

Very Low Activated Factor VII and Reduced Factor VII Antigen in Familial Abetalipoproteinaemia

1998 ◽  
Vol 80 (08) ◽  
pp. 233-238 ◽  
Author(s):  
K. A. Mitropoulos ◽  
M. N. Nanjee ◽  
D. J. Howarth ◽  
J. C. Martin ◽  
M. P. Esnouf ◽  
...  
Keyword(s):  
Plasma Concentrations ◽  
Positive Association ◽  
Factor Ix ◽  
Factor Vii ◽  
Unesterified Fatty Acid ◽  
Factor Xii ◽  
Factor X ◽  
Factor Xi ◽  
Activated Factor Vii ◽  
Normal Mean

SummaryAbetalipoproteinaemia is a rare disorder of apolipoprotein B metabolism associated with extremely low plasma concentrations of triglyce-ride. To discover whether the general positive association between factor VII and triglyceride levels extends to this condition, 5 patients were compared with 18 controls. All patients had a triglyceride below 100 μmol/l. Plasma unesterified fatty acid concentration was normal. Although factor IX activity was only slightly reduced (mean 88% standard) and factor IX antigen was normal, mean activated factor VII in patients was strikingly reduced to 34% of that in controls, a level similar to that found in haemophilia B. The patients’ mean factor VII activity and factor VII antigen were also significantly reduced to 54% and 63% of those in controls, respectively. Mean factor XI activity and tissue factor pathway inhibitor activity were reduced in patients to 70% and 75% of control values respectively, while factor XII, factor XI antigen, factor X, prothrombin and protein C were normal.

Effects on Coagulation and Fibrinolysis of Desmopressin in Patients Undergoing Total Hip Replacement

1991 ◽  
Vol 66 (06) ◽  
pp. 652-656 ◽  
Author(s):  
Per Anders Flordal ◽  
Karl-Gösta Ljungström ◽  
Jan Svensson ◽  
Brenda Ekman ◽  
Gustaf Neander
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Bleeding Time ◽  
Antithrombin Iii ◽  
Postoperative Bleeding ◽  
Double Blind ◽  
Total Hip ◽  
Von Willebrand ◽  
Willebrand Factor ◽  
Coagulation And Fibrinolysis

SummaryTwelve patients undergoing total hip replacement, with regional anaesthesia and with dextran infusion for plasma expansion and thromboprophylaxis, were given the vasopressin analogue desmopressin (DDAVP) or placebo in a randomized, double-blind prospective study. In controls (n = 6) we found a prolongation of the bleeding time, low factor VIII (FVIII) and von Willebrand factor (vWF) and a decrease in antithrombin III to levels known to be at risk for venous thrombosis. Desmopressin shortened postoperative bleeding time, gave an early FVIII/vWF complex increase, prevented antithrombin III from falling to critically low values and appeared to activate the fibrinolytic system, both by tPA increase and PAI-1 decrease.Thus in the controls we found changes in both coagulation and fibrinolysis indicating a haemorrhagic diathesis as well as a risk for thromboembolism. Desmopressin induced factor changes that possibly reduce both risks.

Haemostatic Parameters and Lifestyle Factors in Elderly Men in Italy and The Netherlands

1996 ◽  
Vol 76 (03) ◽  
pp. 411-416 ◽  
Author(s):  
Fransje C H Bijnen ◽  
Edith J M Feskens ◽  
Simona Giampaoli ◽  
Alessandro Menotti ◽  
Flaminio Fidanza ◽  
...  
Keyword(s):  
Alcohol Use ◽  
The Netherlands ◽  
Antithrombin Iii ◽  
Lifestyle Factors ◽  
Activated Partial Thromboplastin Time ◽  
Factor Vii ◽  
Fat Intake ◽  
Factor X ◽  
Elderly Men ◽  
History Of

SummaryThe association between plasma fibrinogen, factor VII, factor X, activated partial thromboplastin time, antithrombin III and the lifestyle factors cigarette smoking, alcohol use, fat intake and physical activity was assessed in 802 men aged 70-90 years in Zutphen (The Netherlands), Montegiorgio and Crevalcore (Italy).Smoking was positively associated with fibrinogen, also after adjustment for other lifestyle factors, age, use of anticoagulants and aspirin like drugs, body mass index, and history of myocardial infarction. Alcohol use was associated with increased levels of factor X and decreased levels of antithrombin III. Fat intake was positively associated with antithrombin III. Between cohorts, considerable differences were observed in levels of haemostatic parameters and the lifestyle factors. Compared to the mediterranean cohorts the Zutphen cohort showed the highest levels of fibrinogen and factor VII. Differences in lifestyle factors could, however, not explain differences between cohorts in levels of any of the haemostatic parameters, despite the observed associations between lifestyle factors and haemostatic parameters.

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