1,721,200 research outputs found
Low incidence of venous thrombosis in homozygous patients with NT 20210 G to a prothrombin polymorphism.
No full textVenous thromboses of upper limbs are more frequently associated with occult cancer as compared with those of lower limbs.
No full textPrevalence of hypertension and its complications in congenital Prekallikrein deficiency: analysis of all reported cases and clinical significance.
No full textHomozygous patients with APC resistance may remain paucisymptomatic or asymptomatic during oral contraception.
No full textChanges in prescription patterns of oral contraceptives in a northern Italian province: relation with venous thromboembolism
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Cardiovascular diseases in congenital prekallikrein deficiency: Comparison with other chanceassociated morbidities
No full textTo compare the prevalence of cardiovascular diseases with other chance-associated morbidities in patients with congenital prekallikrein deficiency. Patients with prekallikrein deficiency were gathered from two time unlimited PubMed searches and from personal files. Inclusion criteria were prekallikrein level less than 15% of normal; correction of aPTT on long incubation times; prolonged aPTT corrected by normal plasma or serum; normal prothrombin time and normal FXII and FXI. Acquired forms were excluded. Out of 106 patients, we have found that 45 patients had at least one chance-associated defect or morbidity at the time of the diagnosis of the clotting defect. Twenty-nine of these 45 patients had cardiovascular disorders. Other comorbidities were found in a much smaller proportion. Congenital prekallikrein deficiency is frequently associated with cardiovascular conditions, namely hypertension, coronary disease, ischemic stroke, venous thrombosis. The significance of these findings is critically discussed as association between two diseases does not necessarily indicate the existence of a causative relation between the two. However, the findings presented here clearly indicate the possibility that such a relation might indeed exist
Store-operated calcium entry: From physiology to tubular aggregate myopathy
No full textStore-Operated Ca2+ entry (SOCE) is recognized as a key mechanism in muscle physiology necessary to refill intracellular Ca2+ stores during sustained muscle activity. For many years the cell structures expected to mediate SOCE in skeletal muscle fibres remained unknown. Recently, the identification of Ca2+ Entry Units (CEUs) in exercised muscle fibres opened new insights into the role of extracellular Ca2+ in muscle contraction and, more generally, in intracellular Ca2+ homeostasis. Accordingly, intracellular Ca2+ unbalance due to alterations in SOCE strictly correlates with muscle disfunction and disease. Mutations in proteins involved in SOCE (STIM1, ORAI1, and CASQ1) have been linked to tubular aggregate myopathy (TAM), a disease that causes muscle weakness and myalgia and is characterized by a typical accumulation of highly ordered and packed membrane tubules originated from the sarcoplasmic reticulum (SR). Achieving a full understanding of the molecular pathways activated by alterations in Ca2+ entry mechanisms is a necessary step to design effective therapies for human SOCE-related disorders
Heparin, coumarin, protein C, antithrombin, fibrinolysis and other clotting related resistances: old and new concepts in blood coagulation
No full textThe concept of resistance in blood coagulation has become important. In the past it was limited to the resistance shown by some patients to heparin, coumarin or aspirin. Subsequently, it was demonstrated that a mutation in a single clotting factor, FV, showed resistance to activated protein C. Since activated protein C is supposed to downregulate aFV and aFVIII, their persistence in the circulation gives origin to a hypercoagulable state. Recently antithrombin resistance has been defined. Several prothrombin abnormalities (dysprothrombinemias) have been shown to be resistant to the action of antithrombin. This is associated with the occurrence of a trombophilic state. Prothrombin may therefore be associated like FV with both a bleeding condition (prothrombin deficiency) and a thrombophilic state (some dysprothrombinemias). Finally, thrombomodulin resistance has been defined in liver cirrhosis. These patients often show an increased ratio between FVIII levels and protein C. This imbalance may be partly responsible for the frequent presence of portal vein thrombosis seen in these patients. All these studies have greatly increased the complexity of the clotting mechanisms and interactions. They have cast light on clinical events which had remained unknown or ill-defined
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