• Korean Journal of Veterinary Research
• /
• v.44 no.3
• /
• pp.469-473
• /
• 2004

This study was performed to investigate the effects of calcium administration on the blood coagulation mechanism through APTT in the calf. Five male calves (70~90 kg) were used in this experiment. In the control group, heparinized normal saline (1 IU/kg/min) had been infusing into the jugular vein for 100 minutes. For the analysis of calcium effects on the APTT, the same solutions had been infusing during the first 40 minutes, subsequently the solution including calcium gluconate (3.3 mg/ml/min) had been infusing for 60 minutes. Blood samples were serially collected every 10 minutes for the APTT and platelets count and every 20 minutes for the calicum level during the infusion. In the calcium-treated group, after 70 minutes the APTT ratio (APTT heparin/APTT baseline) was higher than the therapeutic range. APTT was significantly increased at 50, 60 and 70 minutes in the calcium-treated group as compared to the control group (p<0.01). In the control group, calcium level was decreased significantly after heparin infusion (p<0.01). The platelet count was gradually decreased without significant variation in the both control and calcium-treated groups. These results suggested that APTT is slightly increased in combined heparin and calcium administration.

• Korean Journal of Clinical Laboratory Science
• /
• v.45 no.3
• /
• pp.87-90
• /
• 2013

The activated partial thromboplastin time (APTT) is used primarily to evaluate coagulation abnormalities in the intrinsic pathway. The proper specimen is very important factor for precise results of blood coagulation analysis. The objective of this study was to get to the conclusion of whether to analyze again and to collect blood sample over again when APTT result shows below the reference value. We evaluated 126 samples showing a value below 20.0 sec at ATPT result, which consist of 48 males and 78 females candidates during night duty from March 2012 to December 2012. Average comparisons of APTT result between first and retested analysis among study subjects were significantly different in male samples. APTT results comparison of recollected subjects among clotted samples were also significantly different with both sexes (p<0.000). We suggest that we should carefully check the samples to get accurate results and collect samples again in case of only obtaining improper samples; even though the APTT result show below reference value.

• Journal of Aquaculture
• /
• v.19 no.1
• /
• pp.33-39
• /
• 2006

Anticoagulant activities of a fermented edible brown alga, Laminaria ochotensis was investigated. L. ochotensis was fermented with 15% sugar (w/v) at $25^{\circ}C$ for 10 weeks. Anticoagulant activity was measured from the supernatant of algal mixture at biweekly intervals up to $10^{th}$ week by activated partial thromboplastin (APTT), prothrombin time (PT) and thrombin time (TT) assay using citrated human plasma. Sample having high APTT activity $(6^{th}\;week)$ was filtered, ethanol precipitated and freeze-dried. The polysaccharide compound having anticoagulant activity was purified by DEAE ion exchange chromatography followed by Sepharose-4B gel filtration chromatography. Anticoagulant activity, polysaccharide concentration, and heparin like activity were determined for the collected fractions by APTT, $phenol-H_2SO_4$, and glycosaminoglycan assay, respectively. The anticoagulant activity assay showed that the activity was increased up to $6^{th}$ week, and decreased thereafter. The concentration of our purified compound was $31.0{\mu}g/ml$ and showed higher APTT activity than commercial heparin. At the same concentration of $31.0{\mu}g/ml$, the heparin showed 186.5 sec activity while our purified compound showed an activity of 386 sec. Single spot on agarose gel electrophoresis showed that the compound was purified and polyacrylamide gel electrophoresis (PAGE) results revealed that the molecular mass of the purified polysaccharide compound was between 60 and 500 kDa. Therapeutic interest of the algal polysaccharide as an anticoagulant has recently been in highlighted. This purified anticoagulant compound from fermented L. ochotensis can be used as a model for anticoagulant agent or could be developed as an anticoagulant agent. This study can be extended to identify the structure and chemical composition of the purified polysaccharide, and to establish a relationship between structure and the function of the identified anticoagulant compounds.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.41 no.2
• /
• pp.168-173
• /
• 2012

We performed this study to develop antithrombotic agents from oriental medicine herb extracts. Polygonum cuspidatum has been traditionally used as an edible medical resources for the treatment of cancer, pyodermatitis, hepatitis, cystitis, and inflammation. However, the effects of Polygonum cuspidatum on thrombosis and platelet activation are not precisely understood. The antithrombotic and antiplatelet activities of Polygonum cuspidatum were investigated by assessing the effect of a 70% ethanol extract of Polygonum cuspidatum on blood coagulation, fibrinolysis, and platelet aggregation. Polygonum cuspidatum showed effective fibrinolytic activity at 10 mg/mL. Polygonum cuspidatum also inhibited adenosine diphosphate induced platelet aggregation. Furthermore, evaluation of anticoagulant activity showed that an extract of Polygonum cuspidatum prolonged coagulation time via activated partial thromboplastin time (APTT). Our results show that Polygonum cuspidatum can be a potential candidate for antiplatelet activity as well as a fibrinolytic agent.

• Korean Journal of Food Science and Technology
• /
• v.36 no.6
• /
• pp.1008-1013
• /
• 2004

Effects of extraction conditions and molecular fractionation on anticoagulant activities of major brown seaweeds in Korea were investigated. Hot water extracts of C. costata, U. pinnatifida (Sporophyte), L. japonica, K. crassifolia, E. stolonifera, E. bicyclis, S. horneri, and E. kurome increaced activated partial thromboplastin time (APTT) over 190 seconds, which may be related to intrinsic pathway of blood coagulation. Hot water extract of E. Kurome (EKJ) was further fractionated by ethanol precipitation. EKJ-eim, ethanol-insoluble material of EKJ, showed higher anticoagulant activity than EKJ. EKJ-eim was further fractioned with ultrafiltration. EKJ-eim 1, (over 100 kDa) fraction showed higher APTT activity than EKJ-eim. A EKJ-eim 1 was sulfated polysaccharide consisting of fucose, xylose, mannose, galactose, glucose and, sulfate at molar ratio of 1 : 0.05 : 0.10 : 0.15 : 0.17 : 1.46. The anticoagulant activity increased as sulfate content and molecular weight increased.

• Archives of Pharmacal Research
• /
• v.28 no.9
• /
• pp.1037-1041
• /
• 2005

Geranium (Pelargonium inquinans Ait) leaves were extracted with $80\%$ MeOH, and partitioned into n-hexane, ethyl acetate, BuOH and $H_2O$ to isolate the anticoagulant principles. The EtOAc fraction was found to be the most active, and was further purified using silica and octadecylisilane column chromatography employing a bioassay-guided fractionation method. The active compound was isolated and identified as $1,2,3,4,6-pentagalloyl-\beta-D-glucopyranose$(PGG) (compound I). The isolated anticoagulant significantly prolonged the activated partial thrombin time (APTT) and thrombin time (TT) using normal human plasma. One microgram of $1,2,3,4,6-pentagalloyl-\beta-D-glucopyranose$ showed 0.063 heparin units in the APTT and 2.73 heparin units in the TT for anti-thrombosis. This is the first report of the isolation of PGG from geranium plants.

• Proceedings of the Korean Nutrition Society Conference
• /
• 1994.05a
• /
• pp.50-50
• /
• 1994

• Natural Product Sciences
• /
• v.17 no.4
• /
• pp.309-314
• /
• 2011

Synthetic coumarin and furocoumarin derivatives were evaluated for anticoagulant activity and the effect on liver and kidney function. It was found that all of the compounds under investigation proved to be neither toxic nor lethal up to 500 mg/100 g body weight as a single dose for 24 hrs. All tested compounds showed a significant increase in prothrombin time (PT) in the acute model but failed to show a significant action in the chronic model. Furthermore, all tested compounds revealed a significant increase in activated partial thromboplastin time (APTT) as compared to control value in both acute and chronic model. Also, all tested compounds did not cause any significant changes on liver and kidney functions in rats.

• Korean Journal of Pharmacognosy
• /
• v.33 no.2 s.129
• /
• pp.120-123
• /
• 2002

The possibility of Galla Rhois(GR) water extract as an antithrombotic agent was investigated. The effect of GR on platelet aggregation in human platelet-rich plasma(PRP) induced by collagen and ADP in vitro and coagulation parameters in a pathological model induced by endotoxin and hydrocortisone acetate(HA) in vivo were examined. In platelet aggregation assay, GR extract significantly inhibited platelet aggregation induced by collagen and ADP in a dose-dependent manner. GR extract significantly increased the number of platelet and shortened prothrombin time(PT) and activated thromboplastin time(APTT) as compared with the control in pathological model induced by endotoxin and HA. Also, GR extract significantly increased fibrinogen level as compared with the control in a pathological model induced HA. These results suggest that GR may be a promising antithrombotic agent.

• Journal of Ginseng Research
• /
• v.22 no.3
• /
• pp.173-180
• /
• 1998

Thrombogenesis and atherosclerosis are mainly caused by platelet aggregation, blood coagulation, and hyperlipidemia. Platelet aggrelation, activated platelet thromboplastin time (APTT) were measured as indexes of blood coagulation and lipid contents in the subjects who have taken red ginseng products (e.g. water extract, tea, drink etc.) for 4 to 5 years. The platelet aggregation in the red ginseng-taking group was significantly decreased, as compared with the non-red ginseng-intaking group, when platelets were stimulated by 100 $\mu\textrm{g}$/ml of collagen (P<0.01). The atherogenic index and the ratio of triglyceride to HDL-cholesterol in blood, the risk factors of atherosclerosis, were decreased in the subjects of ginseng group, compared with that in control group. APTT was also prolonged to greater extent in ginseng group than in control group. These results suggest that long-term intake of ginseng products may help to prevent the risks of thrombogenesis and atherosclerosis.