Effects of Mild Leg Exercise in a Seated Position on Haemostatic Parameters Under Normobaric Hypoxic Conditions

2005 ◽  
Vol 30 (6) ◽  
pp. 708-722 ◽  
Author(s):  
Thorsten Schiffer ◽  
Heiko K. Struder ◽  
Hans-Georg Predel ◽  
Wildor Hollmann
Keyword(s):  
Plasminogen Activator ◽  
Antithrombin Iii ◽  
Venous Blood ◽  
Exercise Program ◽  
Normobaric Hypoxia ◽  
Plasminogen Activator Inhibitor 1 ◽  
Hypoxic Conditions ◽  
Leg Exercise ◽  
The Impact ◽  
Resting Period

This study tested the hypothesis that in humans mild leg exercise affects haemostasis in normobaric hypoxia and thus avoids the development of a deep venous thrombosis (DVT). Eight young men breathed in a 15.4% oxygen in nitrogen gas mixture for 2 hrs while seated at rest (R) or seated and performing a 3-min mild leg exercise program (Ex) at 15-min intervals to assess the impact of mild leg exercise on haemostatic parameters related to the risk of developing DVT, as has been discussed for hypobaric hypoxic conditions during commercial airline travel. Capillary blood gases were analysed every 30 min. Heart rate was monitored continuously. Haemostatic parameters were analysed from venous blood at the beginning, after 1 and 2 hrs, and after a 30-min resting period in normoxic conditions. Plasminogen-activator-inhibitor-1 diminished in both tests in hypoxia, but not after the resting period. Antithrombin-III decreased in R in the hypoxic period. Platelet count, international normalized ratio, partial thromboplastin time remained unchanged, as did highly sensitive parameters like tissue-plasminogen-activator, α2-antiplasmin, d-dimers, thrombin-antithrombin-III-complexes, and prothrombin-fragments 1 and 2. The haematocrit decreased significantly in R. The mild leg execise prevented the decrease of antithrombin-III and caused an increase in haematocrit after an initial drop in the first hour. The present study revealed that normobaric hypoxia did not have clinically relevant effects on haemostasis in humans. Mild leg exercise carried out under those conditions did not lead, via alterations in haemostasis, to a reduced risk of DVT. Key words: local aerobic exercise, haemostasis, hypoxia, thrombosis

scholarly journals The Impact of the Gene Variants FV Leiden, FII G20210A, MTHFR C677T and PAI-1 4G/5G on Pregnancy Loss in Women from Central Serbia

2020 ◽  
Vol 21 (1) ◽  
pp. 19-25
Author(s):  
Gordana M. Sosic ◽  
Snezana Sretenovic ◽  
Danijela Radivojevic ◽  
Nikola Jovic ◽  
Mirjana Varjacic
Keyword(s):  
Plasminogen Activator ◽  
Pregnancy Loss ◽  
Methylenetetrahydrofolate Reductase ◽  
Plasminogen Activator Inhibitor ◽  
Gene Variants ◽  
Plasminogen Activator Inhibitor 1 ◽  
Inherited Thrombophilia ◽  
Factor Ii ◽  
The Impact ◽  
Activator Inhibitor

AbstractThrombophilia is a condition of enhanced functionality of the haemostatic system with an increased tendency for thrombosis, and it can be a congenital, acquired, or complex defect. Pregnancy can be the cause of acquired transitory thrombophilia, which may lead to complications if inherited thrombophilia is also present.The aim of this study was to determine the genetic structure of the population based on the frequency of the gene variants factor V Leiden G1691A, factor II G20210A, methylenetetrahydrofolate reductase C677T, and plasminogen activator inhibitor-1 4G/5G, as well as to investigate the predictive value of these gene variants in repeated miscarriages.The study included 87 female patients from Central Serbia with an average age of 32.7±4.5 years with inherited thrombophilia and previous miscarriages, with or without intrauterine foetal death. The exclusion criteria included the existence of gynaecological and infectious aetiology and the deficit of factors important for the coagulation process.The resulting genotypes were in Hardy-Weinberg equilibrium. The frequency of genotypes with mutated alleles was significantly higher in this group of patients than in the control group for all variants except factor II G20210A. The most commonly mutated alleles were the plasminogen activator inhibitor-1 4G allele (0.61) and methylenetetrahydrofolate reductase T allele (0.47). Double mutation of plasminogen activator inhibitor-1 4G/5G and methylenetetrahydrofolate reductase C677T was dominant in patients with recurrent pregnancy loss (46.15%).The presence of a combination of genetic variants of the plasminogen activator inhibitor-1 4G/5G and methylenetetrahydrofolate reductase C677T is a significant predictor of spontaneous abortions in women with inherited thrombophilia in Central Serbia.

scholarly journals Hemostatic Indices in Healthy Foals from Birth to One Month of Age

1995 ◽  
Vol 7 (3) ◽  
pp. 380-385 ◽  
Author(s):  
Michelle Henry Barton ◽  
Debra Deem Morris ◽  
Natalie Crowe ◽  
Chrysann Collatos ◽  
Keith W. Prasse
Keyword(s):  
Plasminogen Activator ◽  
Tissue Plasminogen Activator ◽  
Protein C ◽  
Antithrombin Iii ◽  
Degradation Products ◽  
Plasminogen Activator Inhibitor ◽  
Plasminogen Activator Inhibitor 1 ◽  
Fibrin Degradation Products ◽  
Tissue Plasminogen ◽  
Activator Inhibitor

Hemostatic indices were determined in 45 healthy light breed foals, from birth to 1 month of age, and in 20 healthy adult (>2 years of age) light breed horses. Blood samples were obtained from each foal at 4 ages: 1) < 24 hours, 2) 4-7 days, 3) 10-14 days, and 4) 25-30 days. The following hemostatic indices were determined: platelet count; prothrombin and activated partial thromboplastin times; activity concentrations of protein C, antithrombin III, plasminogen, alpha-2 antiplasmin, tissue plasminogen activator, and plasminogen activator inhibitor- 1; plasma protein C antigen and fibrinogen concentrations; and serum fibrin degradation products concentration. Prothrombin and activated partial thromboplastin times were significantly longer at birth than in older foals. The plasma concentrations of the following were significantly lower at birth than in older foals: antithrombin III, plasminogen and tissue plasminogen activator activities, protein C antigen, and fibrinogen. Concentrations of the following were significantly higher at birth than in older foals: protein C and plasminogen activator inhibitor-1 activities and fibrin degradation products. These results indicate that hemostatic indices of neonatal foals differ significantly from those of older foals and adults. With the exceptions of antithrombin III and tissue plasminogen activator activities, all hemostatic indices measured in foals at 1 month of age were equivalent to adult values.

scholarly journals Specific Polymorphism 4G/5G Gene for PAI-1 as a Possible Cause of Cerebral Venous Thrombosis: A Case Report

2017 ◽  
Vol 18 (2) ◽  
pp. 169-173
Author(s):  
Tatjana Boskovic Matic ◽  
Aleksandar Gavrilovic ◽  
Snezana Simovic ◽  
Dejan Aleksic ◽  
Katarina Vesic ◽  
...  
Keyword(s):  
Venous Thrombosis ◽  
Plasminogen Activator ◽  
Cerebral Venous Thrombosis ◽  
Sinus Thrombosis ◽  
Plasminogen Activator Inhibitor ◽  
Plasminogen Activator Inhibitor 1 ◽  
Sagittal Sinus ◽  
Clinical Center ◽  
The Impact ◽  
Activator Inhibitor

AbstractThrombosis of veins and venous sinus (CVT) is the rare cerebral vascular disorder which makes less than 1% of all strokes. Thrombosis of veins and venous sinuses is picturesquely called “мајоr neurological forger” since it is characterized by very varied clinical picture. Among the various causes of CVT, which can be of infective or non-infective nature, the congenital hyper coagulations especially stand out, diagnosis is based on highly sophisticated diagnostic tests.We present the case of a female patient, 36 years old, who was hospitalized at the Clinic for Neurology in Clinical Center because of the diffuse headache she had for the last few days, with milder right-sided hemiparesis and one generalized tonic-clonic epileptic seizure. With nuclear magnetic resonance (MR/2D venography) the thrombosis of the upper and lower sagittal sinuses is confirmed. By appropriate laboratory tests, as well as by confirmatory immunological and genetic analyses, the impact of the most of the factors is excluded which can contribute to the occurrence of venous thrombosis. The only pathological findings which indicated the possible congenital thrombophilia as the cause of the sagittal sinus thrombosis was the determination of the specific polymorphism of the 4G/5G gene for plasminogen activator inhibitor 1.According to our knowledge, this is the first decribed case of the possible impact of the specific polymorphism of the 4G/5G gene for plasminogen activator inhibitor of 1 on the development of cerebral venous thrombosis.

The Predictive Value of the Hemostasis Parameters in the Development of Preeclampsia

1992 ◽  
Vol 67 (02) ◽  
pp. 214-218 ◽  
Author(s):  
Chao-Hung Ho ◽  
Zwa-Ling Yang
Keyword(s):  
High Risk ◽  
Pregnant Women ◽  
Plasminogen Activator ◽  
Predictive Value ◽  
Antithrombin Iii ◽  
Serine Esterase ◽  
Plasminogen Activator Inhibitor 1 ◽  
Significant Difference ◽  
At Iii ◽  
D Dimer

SummaryIn order to find out which hemostasis parameters would have the predictive value for the development of preeclampsia, modified antithrombin III (ATM, representative of the antithrombin Ill-serine esterase complex), tissue plasminogen activator (tPA), plasminogen activator inhibitor-1 (PAI-1), beta-throm-boglobulin (BTG), antithrombin III (AT III), fibrinogen, fibrin(ogen) degradation product (FDP), FDP D-dimer and euglobulin lysis time (ELT) were measured in 20 normal nonpregnant women, 21 normal pregnant women, 6 high-risk pregnant women, 14 preeclampsia pregnant women, and 5 patients with disseminated intravascular coagulation (DIC). Only tPA and AT III were found significantly different between the preeclampsia and the normal or high-risk pregnant women: tPA was found progressively and significantly increased from the normal pregnant, to the high-risk pregnant, then to the preeclampsia women (p <0.05). AT III was significantly lower in the preeclampsia than in the normal pregnant (p = 0.0001) or in the high-risk pregnant women (p = 0.002). In the 2nd trimester, tPA, PAI, fibrinogen and FDP were significantly higher, and AT III was significantly lower in the preeclampsia than in the normal pregnant women, whereas in the 3rd trimester, tPA and AT III were significantly higher or lower, respectively, in the preeclampsia than in the normal pregnant women. No significant difference of ATM could be found between the preeclampsia and the normal or high-risk pregnant women. From the present study, we suggest that tPA and AT III would be used as the main predictors, and FDP and D-dimer as the complementary predictors for the development of preeclampsia and should be detected in the normal or high-risk pregnant women.

Evidence that fibrinolytic changes in paediatric obesity translate into a hypofibrinolytic state

2012 ◽  
Vol 108 (08) ◽  
pp. 311-317 ◽  
Author(s):  
Fabrizio Semeraro ◽  
Paola Giordano ◽  
Maria F. Faienza ◽  
Luciano Cavallo ◽  
Nicola Semeraro ◽  
...  
Keyword(s):  
Plasminogen Activator ◽  
Clot Lysis ◽  
Obese Children ◽  
Plasminogen Activator Inhibitor 1 ◽  
Thrombotic Risk ◽  
Paediatric Obesity ◽  
The Impact ◽  
Circulating Levels ◽  
Fibrinolytic Capacity ◽  
Pai 1

SummaryPaediatric obesity, like adulthood obesity, is associated with an increase of fibrinolysis inhibitors. No study, however, has evaluated the impact of these changes on plasma fibrinolytic capacity. We investigated plasma fibrinolysis and the role therein of the fibrinolytic changes associated with obesity in 59 obese children (body mass index > 95th percentile) and 40 matched controls. Fibrinolysis was investigated by measuring 1) the plasma levels of relevant fibrinolytic factors; 2) the in vitro fibrinolytic capacity under different conditions, using a microplate plasma clot lysis assay; 3) the circulating levels of markers of clotting and fibrinolysis activation. Plasminogen activator inhibitor 1 (PAI-1), total thrombin activatable fibrinolysis inhibitor (TAFI) and fibrinogen levels were higher in obese children as compared to controls (p<0.01). Plasma clots from obese children lysed significantly slower than control clots when exposed to exogenous plasminogen activator, indicating a greater resistance to fibrinolysis. By the use of a selective inhibitor of activated TAFI and by regression analyses we found that fibrinolysis resistance in obese samples was attributable to PAI-1 increase and to enhanced TAFI activation. The ratio between the circulating levels of D-dimer and thrombin-antithrombin complex, a marker of in vivo fibri-nolysis, was significantly lower in obese children, suggesting a reduced fibrinolytic efficiency. These data indicate that paediatric obesity is associated with a hypofibrinolytic state which might contribute to the increased thrombotic risk associated with this condition.

Hemostatic Adaptations to High Intensity Interval Training in Healthy Adult Men

2020 ◽  
Vol 41 (12) ◽  
pp. 867-872
Author(s):  
James R. Sackett ◽  
Dan P. Farrell ◽  
Paul R. Nagelkirk
Keyword(s):  
Plasminogen Activator ◽  
High Intensity ◽  
Antithrombin Iii ◽  
Interval Training ◽  
Plasminogen Activator Inhibitor ◽  
High Intensity Interval Training ◽  
Plasminogen Activator Inhibitor 1 ◽  
Tissue Plasminogen ◽  
High Intensity Interval ◽  
Activator Inhibitor

AbstractRegular exercise is theorized to reduce cardiovascular risk by attenuating coagulation and augmenting fibrinolysis. However, these adaptations have not been consistently observed during traditional exercise programs. The purpose of this study was to examine hemostatic adaptations in healthy men following four (4W) and eight (8W) weeks of high intensity interval training. Twenty-one men (age=25±1 y; body mass index=26.5±6.4 kg/m2) completed eight weeks, three days/week of high intensity interval training on a cycle ergometer. Activated partial thromboplastin time, prothrombin time, and plasma concentrations of thrombin-antithrombin III, fibrinogen, tissue plasminogen activator, and plasminogen activator inhibitor-1 were assessed at baseline (BL), 4W, and 8W. Repeated measures ANOVA were used to determine potential effects of training. There were no significant changes observed for activated partial thromboplastin time (BL=43.3±5.5, 4W=43.2±5.1, 8W=44.2±6.4 s); prothrombin time (BL=13.2±0.9, 4W=13.0±0.6, 8W=13.1±0.8 s); thrombin-antithrombin III (BL=6.0±2.3, 4W=5.8±2.3, 8W=5.6±3.1 ng/mL); tissue plasminogen activator (BL=9.7±3.3, 4W=9.4±3.2, 8W=8.7±2.8 ng/mL); and plasminogen activator inhibitor-1 (BL=19.0±17.5, 4W=19.3±17.0, 8W=18.9±18.9 ng/mL) (all p>0.05). Fibrinogen was significantly lower at 4W (238.6±70.3 mg/dL) compared to BL (285.0±82.1 mg/dL; p<0.05) and 8W (285.3±83.2 mg/dL; p<0.05). These findings indicate that eight weeks of high intensity interval training does not influence coagulation potential and/or stimulate fibrinolysis.

scholarly journals The Impact of Moderate Physical Exercise on the Rheological and Biochemical Properties of Blood in Osteoarthritis Patients Who Are Regular Winter Swimmers

2021 ◽  
Vol 69 (1) ◽  
pp. 31-37
Author(s):  
Małgorzata Strzelczyk ◽  
Aneta Teległów ◽  
Jakub Marchewka ◽  
Bartłomiej Ptaszek ◽  
Anna Marchewka
Keyword(s):  
Physical Exercise ◽  
Cold Water ◽  
Water Immersion ◽  
Venous Blood ◽  
Exercise Program ◽  
Blood Parameters ◽  
Cold Water Immersion ◽  
Biochemical Properties ◽  
Rheological Parameters ◽  
The Impact

The aim of this study was to assess the influence of moderate physical exercise on selected blood parameters in regular winter swimmers who suffer from osteoarthritis. The study covered a period of 6 months, from November to April, and was carried out on 17 women and 22 men. The participants were divided into 4 groups: Female CWI – women who only immersed themselves in cold water, Female CWI + PE – women who exercised in addition to water immersion, Male CWI – men who only immersed themselves in cold water, and Male CWI + PE – men, who exercised in addition to water immersion. Venous blood was collected twice, before and after the exercise program. A statistically significant decrease in fibrinogen, plasma viscosity, T ½ , and AMP was observed in the blood of people who did not take part in the physical exercise program while a significant decrease in cortisol levels was observed in the people who participated in the exercise program in addition to cold water immersion. In terms of rheological parameters, a significant increase in the elongation index (EI) of erythrocytes from shear stress 2.19 Pa in all groups was observed. There were no statistically significant changes in AI in all groups. Physical activity has an influence on the blood parameters of elderly winter swimmers suffering from osteoarthritis.

scholarly journals Deep mutational scanning of the plasminogen activator inhibitor-1 functional landscape

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zachary M. Huttinger ◽  
Laura M. Haynes ◽  
Andrew Yee ◽  
Colin A. Kretz ◽  
Matthew L. Holding ◽  
...  
Keyword(s):  
Amino Acid ◽  
Plasminogen Activator ◽  
Genomic Sequence ◽  
Plasminogen Activator Inhibitor ◽  
Single Amino Acid ◽  
Plasminogen Activator Inhibitor 1 ◽  
Missense Variants ◽  
The Impact ◽  
Activator Inhibitor ◽  
Pai 1

AbstractThe serine protease inhibitor (SERPIN) plasminogen activator inhibitor-1 (PAI-1) is a key regulator of the fibrinolytic system, inhibiting the serine proteases tissue- and urokinase-type plasminogen activator (tPA and uPA, respectively). Missense variants render PAI-1 non-functional through misfolding, leading to its turnover as a protease substrate, or to a more rapid transition to the latent/inactive state. Deep mutational scanning was performed to evaluate the impact of amino acid sequence variation on PAI-1 inhibition of uPA using an M13 filamentous phage display system. Error prone PCR was used to construct a mutagenized PAI-1 library encompassing ~ 70% of potential single amino acid substitutions. The relative effects of 27% of all possible missense variants on PAI-1 inhibition of uPA were determined using high-throughput DNA sequencing. 826 missense variants demonstrated conserved inhibitory activity while 1137 resulted in loss of PAI-1 inhibitory function. The least evolutionarily conserved regions of PAI-1 were also identified as being the most tolerant of missense mutations. The results of this screen confirm previous low-throughput mutational studies, including those of the reactive center loop. These data provide a powerful resource for explaining structure–function relationships for PAI-1 and for the interpretation of human genomic sequence variants.

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