Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.4.21.6 (thromboplastin)
 13,278 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Primary antiphospholipid syndrome (PAS) is characterized by the isolated presence of antiphospholipid antibodies in the absence of other immunological changes. Its association with ischemic cerebrovascular disease is rarely reported. This study analyzes this association in 10 patients (8 women) first presenting with ischemic cerebrovascular accident (ICVA) that met the criteria for PAS. The average age of the patients was 50.4 years. Two patients had Sneddon's syndrome. Prolonged thromboplastin partial activation time was found in only three patients. Eight started aspirin therapy. The average time of follow-up was 17.2 months, during which there was one relapse. PAS should be included as a possible cause when examining individuals with ICVA, particularly when patients are young, when abortion has occurred or when no other cause is evident. Acetylsalicylic acid is effective for preventing relapse when other vascular risk factors are carefully controlled.
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PMID:[Primary antiphospholipid syndrome and cerebrovascular disease]. 820 46

Primary antiphospholipid syndrome (PAPS) is an autoimmune disorder manifested by recurrent thrombosis in the venous and arterial system. We report a group of seven patients with lower limb ischaemia associated with PAPS. Four were male patients and three were females, with a mean age of 37 years. All had a previous deep vein thrombosis and the majority, five out of seven, had a prior cerebrovascular accident (CVA). Prolonged activated thromboplastin time was demonstrated in all our patients and PAPS was established by positive thromboplastin titration index, circulating anticoagulant index and increased anticardiolipin levels. Symptoms included claudication in three, rest pain in four and gangrene in five patients. Angiography demonstrated thrombosis of various segments of the arterial tree including: aorta, iliac, femoral and popliteal arteries. Two patients were treated conservatively and one by percutaneous transluminal angioplasty (PTA) of the distal aorta. A total of eleven vascular surgical procedures were performed in four patients resulting in early postoperative thrombosis (2h-30 days) in 10 cases. Only one graft remained patent, when full heparinisation (1000 units/h) was used perioperatively. We conclude that PAPS patients are at high risk for graft thrombosis and should only be operated upon on full anticoagulation, starting at operation and proceeding indefinitely.
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PMID:Lower limb ischaemia in primary antiphospholipid syndrome. 835 98

Primary antiphospholipid syndrome (pAPS) can be experimentally induced in mice by immunization with anti-cardiolipin (aCL) antibodies (Abs). Recently, we have pointed to the pathogenic role of antiphosphatidylserine (aPS) Abs by inducing an experimental model of pAPS in naive mice following passive transfer of human aPS to the tail vein of ICR mice. The aim of the present study was to induce experimental pAPS in mice following active immunization with aPS. Mice were immunized with IgG and IgM aPS, purified from two patients with pAPS. The sera of the mice were examined for the presence of different antiphospholipid Abs, and the beta 2 GPI dependency of aPS, using an enzyme-linked immunosorbent assay (ELISA). Inhibition ELISA studies, with silica beads coated with phospholipids, were used to detect cross-reactivity of aPS or aCL to other phospholipids. The mice were also tested for the presence of thrombocytopenia, prolonged activated partial thromboplastin time (APTT), and the percentage of fetal resorptions. The purified IgG aPS but not IgM aPS had a strong lupus anticoagulant activity. Both IgG and IgM aPS were beta 2 GPI dependent and did not bind PS in the absence of the glycoprotein. The mice immunized with IgG aPS, but not IgM aPS, developed high titers of mouse aPS. The mice generated polyspecific Abs, cross-reacting with aCL and aPS, as well as individual aPS or aCL Abs. Only the mice immunized with IgG aPS developed clinical parameters of pAPS: prolonged APTT, thrombocytopenia, and an increased fetal resorption rate. In conclusion, active immunization with IgG, but not IgM, aPS induces experimental pAPS in naive mice, thus pointing to the participation of aPS in the idiotypic network.
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PMID:The pathogenic role of anti-phosphatidylserine antibodies: active immunization with the antibodies leads to the induction of antiphospholipid syndrome. 859 79

A 20 year old man with severe chest pain was hospitalised for acute myocardial infarction. Coronary angiography revealed total obstruction of his right coronary artery, which was successfully recanalised by direct percutaneous transluminal coronary angioplasty (PTCA). There was also diffuse thrombi in the left coronary artery that was not recanalised by perfusion with 3000 U pro-urokinase. Anticoagulant therapy was performed after PTCA. Creatine kinase peaked one day after hospitalisation (4805 U/l). The activated partial thromboplastin time was 62.6 seconds (45%). Plasma anticardiolipin IgG antibodies were high (3.8 and 2.7) in repeated examinations. The PTCA site was patent after three months. Primary antiphospholipid syndrome should be considered as a cause of acute myocardial infarction in young adults, and PTCA with anticoagulant treatment is effective for initial treatment of the syndrome.
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PMID:Primary antiphospholipid syndrome with acute myocardial infarction recanalised by PTCA. 950 29