Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P00750 (PLA)
 16,800 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Gastric juice from 15 normals, 20 patients with gastric ulcer and 14 patients with erosive haemorrhagic gastroduodenitis was investigated in respect of its activity on unheated and heated fibrin plates and its content of FDP and plasminogen or plasmin with immunochemical methods. Gastric juice from normals showed no activity on unheated and heated fibrin plates, and no FDP or plasminogen could be demonstrated. In the patients with gastric ulcer the gastric juice showed little or no fibrinolytic activity on fibrin plates except in 2, who had regurgitation of duodenal juice and neutral pH of the juice. These patients had equally high activity on heated as on unheated plates and no plasmin could be demonstrated. It was shown that this activity was not due to fibrinolysis, but to non-specific proteolytic activity (probably trypsin). The patients with erosive haemorrhage gastroduodenitis exhibited quite a different picture. The gastric juice from these patients showed extremely high activity on fibrin plates, the activity was higher on unheated than on heated plates. The activity was inhibited in vitro by addition of EACA and in vivo after administration of AMCA. The occurence of plasmic could be demonstrated directly immunologically in the gastric juice. By comparsion of plasmin and trypsin in various assays it could further be improved that the gastric juice in these cases contained plasminogen activator and plasmin. The patients with erosive haemorrhagic gastroduodenitis showed no increase in fibrinolysis in the blood, but low values for plasminogen and alpha2-M, and the serum contained FDP. These findings in the blood and gastric juice were interpreted as signs of local fibrinolysis in the stomach and duodenum. There is reason to assume that this gastric fibrinolysis contributes substantially to the bleeding tendency. The effect of administration of AMCA on fibrinolytic activity and the haemorrhage lends support to the assumption of such a mechanism.
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PMID:Gastric fibrinolysis. 0 Aug 7

An increased blood fibrinolytic activity manifested by increased tissue plasminogen activator (t-PA) and decreased tissue plasminogen activator inhibitor (PAI-1) and increased FDP levels are seen in 40 patients with mild hypertrophy of prostate. Surgical treatment increased blood fibrinolytic activity manifested in the increase in t-PA, decrease in PAI-1, shortening of ELT, increase in FDP, and decrease in plasminogen and 2-AP activities. Blood fibrinolytic activity was the highest immediately after surgery with tendency to the gradual normalization. Positive ethanol test and decrease in thrombocyte count indicate and activation of blood clotting system induced by the tissue thrombo-elastins released during surgery. Subclinical DCI with the secondary increased fibrinolysis activation is present in patients with mild hypertrophy of the prostate both prior to and after surgery.
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PMID:[Tissue plasminogen activator, its inhibitor and other parameters of fibrinolysis in blood of patients operated for mild hypertrophy of the prostate]. 128 28

In this paper, we carried out provocation tests by means of ultra-short wave stimulation in patients with focal infection including palmoplantar pustulosis and examined the changes in fibrinolytic activity of the circulating blood. In the positive group with palmoplantar pustulosis, the t-PA level was slightly increased after the provocation and the FDP level in the positive group was increased. On the other hand, the AT-III activity in the positive group with palmoplantar pustulosis was decreased and the antiplasmin activity in the positive group was increased. The changes of antiplasmin activity observed in this experiment did not correspond with the pathophysiological explanation of an increased fibrinolytic activity in the circulating blood. It was suggested that a positive provocation test is accompanied by an increase in fibrinolytic activity in the circulating blood of patients with focal infection of the tonsil, and the increase in fibrinolytic activity is closely related to the positiveness of the provocation test.
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PMID:Evaluation of provocation tests in tonsillogenic focal infection from the standpoint of fibrinolytic activity. 129 98

Heparin is indispensable anticoagulant for cardiopulmonary bypass, but the dose of heparin is even now under discussion. In this study, hemostatic fluctuation was analyzed during and after the bypass using hemostatic molecular markers. The subjects were 16 adult cases of open heart surgery, 12 males, 4 females. The average age was 55.0 year. Operations were aortocoronary bypass in 12, valvular surgery in 3 and ASD patch closure in one with moderate hypothermic cardiopulmonary bypass. At the beginning of cardiopulmonary bypass, 3 mg/kg heparin was administered and the equivalent amount of protamine sulfate was used for neutralization at the end of the bypass. Platelet count, hematocrit, antithrombin III (ATIII), beta-thromboglobulin, platelet factor 4, fibrinopeptide A, thrombin antithrombin III complex, FDP, D dimer FDP, plasmin alpha 2 plasmin inhibitor complex, tissue plasminogen activator (t-PA), and thrombomodulin (TM) were measured through the operation up to two weeks after surgery. ATIII decreased to 50% of control value all through the bypass. Platelet markers increased immediately, and the activated state continued 3 hours after the bypass. Coagulation markers increased markedly after the aortic declamping, and reached at its peak by three times as control value, immediately after the protamine neutralization and continued for 3 hours. During the bypass, fibrinogenolysis caused by t-PA which was stimulated by non-physiological circulation and stimulating substances, was observed. Fibrinolysis occurred following the hypercoagulability after the neutralization. TM was within normal range before the aortic declamping. But increased gradually after the declamp, and reached twice as much as the base line. It could be concluded that hypercoagulability and high platelet activation might play a role of perioperative thrombosis. Hypercoagulability and increase of serum TM would be related to reperfusion of the lung. The increasing of TM would reflect broad injury of vessel walls after the bypass, because plasma TM increased following the generalized injury of endothelial cells.
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PMID:[A clinical study on hemostatic fluctuation during and after cardiopulmonary bypass using hemostatic molecular markers]. 133 89

In order to clarify the effect of hemodialysis (HD) on the fibrinolytic system, fibrinolytic activity was evaluated in 27 patients undergoing regular hemodialysis treatment (RDT) using new parameters including plasma alpha 2-plasmin inhibitor (alpha 2 PI), alpha 2-plasmin inhibitor-plasmin complex (alpha 2 PIC), cross-linked fibrin degradation products (XL-FDP), tissue plasminogen activator (t-PA) activity, t-PA antigen and plasminogen activator inhibitor-1 (PAI-1) antigen. Predialysis baseline levels of plasminogen and alpha 2PI activity in RDT patients were significantly lower and those of alpha 2PIC were significantly higher than normal control values. During a single HD session, alpha 2PIC exhibited a continuous, significant increase reaching about 180% of initial values by the end of HD. alpha 2PI activity was significantly decreased at the end of the HD, though there were no significant changes in plasminogen activity during HD. Predialysis baseline levels of XL-FDP in RDT patients were significantly higher than normal control values. No significant changes in XL-FDP were observed during HD. Both t-PA activity and t-PA antigen significantly increased during HD, and PAI-1 antigen significantly decreased during HD. Von Willebrand factor (vWF) antigen in plasma, which is regarded as reflecting a release reaction by vascular endothelial cells to certain stimuli, also significantly increased during HD. However, neither vWF antigen nor t-PA antigen was increased by heparin administration alone. The changes in alpha 2PI and alpha 2PIC levels suggest that fibrinolytic activity is slightly higher in RDT patients and is even higher during HD.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Enhanced fibrinolytic activity during the course of hemodialysis. 138 98

The key enzyme for fibrinolysis is plasmin, which is converted from plasminogen by plasminogen activator. Activated plasmin lyses fibrinogen and fibrin to make fibrin degradation products(FDPs) and plasmin is inactivated immediately by alpha 2 plasmin inhibitor. As FDP.D dimer is derived solely from insoluble fibrin, FDP.D dimer is thought of as an index for clot lysis. We measured plasmin-alpha 2 plasmin inhibitor complex(PIC) and FDP.D dimer plasma levels in 3 patients with acute pulmonary thromboembolism treated with recombinant tissue plasminogen activator(tPA). Fifteen million units of tPA(TD-2061) were infused in one hour on the first, second and third hospital days. PIC and FDP.D dimer before tPA infusion showed slightly elevated values as compared to normal ranges. They increased markedly after tPA infusion. These findings suggest that the fibrinolytic system is slightly activated in the acute phase of pulmonary thromboembolism and also strongly activated by tPA infusion. Increased FDP D dimer suggests that fibrin clots are dissolved by activated plasmin. Improvement of arterial oxygen tension was observed after tPA infusion. As sustained higher FDP.D dimer means the existence of fibrin clots, heparin treatment should be continued for prevention of clot formation as long as FDP.D dimer shows higher value. In conclusion, PIC and FDP.D dimer are useful indices not only to detect the activated state of the fibrinolytic system but also to know clot lysis in tPA treatment.
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PMID:[Measurements of plasmin-alpha 2 plasmin inhibitor complex and FDP.D dimer levels in the fibrinolytic therapy of acute pulmonary thromboembolism]. 138 24

Eighty-nine consecutive Chinese patients (69 males, 20 females) with acute myocardial infarction treated by 100 mg recombinant tissue-plasminogen activator (rt-PA) (7 intracoronarily, 82 intravenously) at 3.7 +/- 1.0 hours after onset, and intravenous heparin or dipyridamole therapy started at 3 hours, were studied prospectively. Their mean age was 59.6 +/- 10.6 years. Forty-six patients (51.7%) had anterior and 39 patients (43.8%) had inferior infarcts. Clinical evidence of reperfusion was seen in 63 patients (72.8%), while new complications included hypotension (5.6%), heart failure (6.7%), cardiac arrhythmias (76.4%), hematoma around vascular access sites (23.6%), melena (2.2%) and cerebral infarction (2.2%). Maximal changes in coagulation profiles were seen at 3 hours, including a decrease in fibrinogen (by 64.2%), an increase in FDP by 11.7 times and D-dimers by 4.4 times. Nine patients (10.1%) had recurrence of angina and 6 patients (6.9%) died due to pump failure (5) and reinfarction (1). Angiogram at 14 days confirmed TIMI (2 or 3) patency of infarct related arteries in 62/81 (76.5%) patients, with a mean global ejection fraction of 52.5 +/- 12.4%. Nearly all survivors could maintain class I-II functional status after discharge. The safety and promises of rt-PA for acute myocardial infarction in the Chinese were confirmed.
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PMID:Recombinant tissue-plasminogen activator (rt-PA) in acute myocardial infarction in the Chinese in Hong Kong. 149 66

16 coagulant and 7 fibrinolytic parameters were determined in 121 normal subjects and 456 patients with various types of viral hepatitis. The results showed that plasma concentration of F VIII: c, vWF: Ag and vWF: Ag/VIII: c (P less than 0.01) were much higher than those in the controls. Plasma level of other coagulant factors was progressively reduced when the severity of hepatitis was decreased. The changes of fibrinolytic activity suggest that t-PA, PL and FDP were increased, while PAI, PLG, and alpha-PI were decreased. The results of this study may provide an experimental basis for further study of hemorrhage mechanism and prognosis in patients with viral hepatitis.
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PMID:[Changes in plasma coagulant factors and plasma fibrinolytic activity in patients with viral hepatitis]. 166 71

Endoglycan, a heparan-dermatan sulphate association, is a highly purified heparinoid extracted from porcine intestinal mucosa. The aim of our study was to investigate the fibrinolytic system in a group of healthy controls and vascular disease patients, before and after endoglycan administration "per os". All the patients had a reduced basal fibrinolytic activity. The tests carried out were PT, PTT, FDP, Euglobulin Lysis Time (ELT), fibrinogen, plasminogen, alpha 2-antiplasmin, alpha 2-macroglobulin and t-PA activity assayed with a chromogenic method. After endoglycan administration, we have shown a significant shortening of ELT with complete normalization during the treatment. A fibrinogen decrease and either plasminogen or alpha 2-antiplasmin increase was seen. This was shown in normals too, however to a lesser extent. During therapy most of the healthy subjects, but only some patients, showed increased t-PA levels. Before and during treatment, significantly higher t-PA levels were seen in the control group as compared to the patients group. Reduced t-PA release was seen in our vascular disease patients. In conclusion, endoglycan "per os" appears to exert a stimulatory effect on the fibrinolytic system.
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PMID:Fibrinolytic effect of a particular glycosaminoglycan (endoglycan) per os on normals and in patients with chronic artery disease. 170 5

Major abdominal surgery is accompanied by intra-operative increases in factor VIII (FVIII), plasminogen activator activity (PAA) and fibrinopeptide A (FPA). Vasopressin (aVP) released during surgery mediates some of the effects but the mechanisms involved in this response are unclear. To investigate the role of the operative procedure, 20 subjects were studied during inguinal hernia operation under local anaesthesia. Venous blood samples were taken for FVIII coagulant activity (FVIII:C), euglobulin clot lysis time (ECLT), FPA, crosslinked FDPs (XL-FDP) and a VP. In six patients, aVP rose from (median) 0.5 to 38.3 pg/ml at bowel manipulation and fell to 4.1 pg/ml post-operatively. PAA rose from 33 units to 377 and 316 units (P less than 0.01), FVIII:C from 1.58 to 2.4 IU/ml (P less than 0.01) and FPA from 5.0 to 6.8 and 11.0 pmol/ml intra-operatively (P less than 0.002). XL-FDP rose from a median value of 34 ng/ml pre-operatively to 230 ng/ml post-operatively. In 14 patients plasma aVP levels remained constant and both FVIII:C and PAA remained unchanged. FPA rose from 2.6 pmol/ml to 5.9 pmol/ml intra-operatively (P less than 0.05) and XL-FDP fell from 110 to 60 ng/ml. Between groups, the changes were significantly different for FVIII:C (P less than 0.05) and PAA (P less than 0.03) with no differences in blood pressure, pulse or symptoms. These results support the hypothesis that aVP secretion during surgery mediates increases in FVIII and PAA. FPA tended to be higher in the aVP secreting group which indicates that aVP mediated activation of coagulation results in a hypercoagulable state.
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PMID:Vasopressin and haemostatic responses to inguinal hernia repair under local anaesthesia. 178 35


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