Normal hemostasis requires balanced regulation of prothrombotic and antithrombotic factors. Inherited alteration of factor V and prothrombin gene, the G20210A mutation, increases the resistance of factor V to degradation and booster production of prothrombin respectively. These alterations can increase hypercoagulability leading to thrombotic consequences. We aimed to assess the frequencies of ...

  Objective(s): Echis carinatus is one of the venomous snakes in Iran. The venom of Iranian Echis carinatus is a rich source of protein with various factors affecting the plasma protein and blood coagulation factor. Some of these proteins exhibit types of enzymatic activities. However, other items are proteins with no enzymatic activity.   Materials and Methods: In order to study the mechanism ...

background: acetaminophen (n-acetyl-p aminophenol; apap) is one of the most common types of analgesics. it is also the most common xneobitic reported to poison centers. this study investigates if therapeutic doses of nac can falsely increase coagulation tests, prothrombin time (pt) and bleeding time (bt). ​​ methods: thirty-six apap poisoned patients whose acetaminophen serum concentration were...

To study the specific role of gamma-carboxyglutamic acid (Gla) residues in prothrombin, we have isolated a series of partially carboxylated prothrombin variants from a patient with a hereditary defect in vitamin K-dependent carboxylation (Goldsmith, G. H., Pence, R. E., Ratnoff, O. D., Adelstein, D. A., and Furie, B. (1982) J. Clin. Invest. 69, 1253-1260). The three variant prothrombins, purifi...

The 25,000 Af, fragment obtained by thrombin digestion of normal prothrombin has been further compared with the corresponding fragment from dicoumarol-induced prothrombin. In contrast with the fragment from normal prothrombin, the one from dicoumarol-induced prothrombin does not bind calcium (STENFLO, J. (1973) /. Biol. Chem. 248, 6325). After cyanogen bromide degradation of this material, a fr...

A patient developed bleeding due to an acute acquired specific prothrombin deficiency. Unlike previously described patients, this patient had no evidence of an associated lupus anticoagulant. Prothrombin activity and antigen were decreased concordantly and the patient's plasma did not neutralize the activity of added prothrombin or interfere with its measurement by electroimmunoassay. Neverthel...