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)

Livedo reticularis is associated with collagen vascular diseases and other vaso-occlusive disorders in a substantial number of cases. In the remaining cases the cause of livedo reticularis is still unknown. (i.e., idiopathic). We sought to determine a possible causal relationship between idiopathic livedo reticularis and autoimmune factors associated with the coagulation system, including antiendothelial cell antibodies. Nine patients with idiopathic livedo reticularis were studied. All patients were found to have normal platelet count, fibrinogen levels, and prothrombin and activated partial thromboplastin times, as well as negative results for Venereal Disease Research Laboratory and D-timer tests. Anticoagulant activity was detected in 2 patients: one had positive results of thromboplastin titration index and Russell's viper venom test, as well as increased levels of anticardiolipin antibodies and anti-endothelial cell antibodies; the other has positive thromboplastin titration index, mildly increased levels of anti-endothelial cell antibodies, and markedly increased levels of antinuclear antibodies. A third patient had mildly increased levels of anti-endothelial cell antibodies alone, and a fourth patient had mildly increased levels of antinuclear antibodies only. The clinical outcome was uneventful in all of the patients during an 18-month follow-up period. These findings suggest involvement of autoimmune factors associated with the coagulation system in some patients with idiopathic livedo reticularis, whose clinical significance remains to be determined.
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PMID:A study of coagulation and anti-endothelial antibodies in idiopathic livedo reticularis. 918 65

Livedo reticularis is a common presentation of the anticardiolipin syndrome. Although the presence of anticardiolipin (aCL) antibodies was previously reported in association with both Graves disease and Hashimoto thyroiditis, I am aware of no previous report of livedo reticularis in patients with Graves disease. A 29-year-old woman presented with very active Graves thyrotoxicosis. Physical examination revealed, in addition to signs of very active hyperthyroidism, marked livedo reticularis on both her legs. Laboratory tests confirmed the clinical impression regarding her thyroid activity and revealed prolonged prothrombin time (and partial thromboplastin time) and elevated levels of both immunoglobulin G and immunoglobulin M aCL antibodies. After methimazole-induced remission, livedo reticularis completely disappeared and the levels of aCL antibodies decreased to within the low range of normal. The literature on aCL antibodies and autoimmune thyroid diseases is reviewed and the interaction between the occurrence of aCL antibodies, disease activity, and drug therapy in Graves disease is discussed.
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PMID:Livedo reticularis: a rare manifestation of Graves hyperthyroidism associated with anticardiolipin antibodies. 1525 31