In this study, IgG was partially purified from rabbit antisera against human normal prothrombin. The presence of antibodies against prothrombin was shown by Ouchterlony's double immunodiffusion method. This IgG was adsorbed to microwells and an enzyme-linked immunosorbent assay (ELISA) meth...

BackgroundThrombophilia is reported to be a candidate etiology of recurrent pregnancy loss (RPL). No conclusive results on the association between prothrombin G20210A mutation and RPL have been reported.

The submicrosomal site for the conversion of prothrombin precursor to prothrombin in rat lever has been investigated by subcellular fractionation techniques.Prothrombin precursor activity could be detected in the luminal as well as the membrane fraction of the rough microsomes. The corresponding...

The work focused on the penultimate enzyme, prothrombin, in the coagulation cascade. Prothrombin was purified and characterized from ostrich plasma. The results obtained contribute to a better understanding of blood coagulation in the ostrich and the evolution of prothrombin and the coagulation ...

A common mutation in the prothrombin gene (G20210A) is associated with elevated prothrombin levels and thrombosis. The pathomechanism related to the G20210A mutation is currently not understood and the interdependence of prothrombin activity and prothrombin concentration in plasma is still poorl...

Prothrombin is activated to thrombin by the prothrombinase complex through sequential cleavage at two distinct sites. This occurs at sites of vascular injury in a highly regulated cascade of serine protease and cofactor activation, where activated platelets provide a suitable surface for proteas...

A dysfunctional prothrombin gene characterized by novel point mutation at Arg553 to Gln residue in Deep vein thrombosis (DVT) patient which we designated as “Prothrombin Amrita” was previously reported from our lab. The mutation occurred at nucleotide 20030 in exon 14 and was confirmed by rest...

The l- and d-isomers of azidoalanine (azide metabolite) have been chemically synthesized with 60% yield using corresponding N-(tert-butoxycarbonyl)-serine as starting materials. The mutagenic properties of synthesized l-azidoalanine are very similar to those of azide and in vivo synthesized azid...

Platelet hyperactivity accompanied by an increased synthesis of thromboxane and/or a decreased prostacyclin production are important factors in ischemic diabetic retinopathy. We studied the effect of camonagrel and dazoxiben, two thromboxane synthase inhibitors, on retinal vascularization in a m...

1S,2R-Indene oxide is the precursor of cis-1S,2R-aminoindanol, a key intermediate for the Merck HIV–1 protease inhibitor, Crixivan®. As an alternative to the challenging chemical synthesis of this chiral epoxide from indene, the biotransformation route using an enzyme catalyst was examined. App...

In order to identify compounds selective for the GluK1 and GluK3 subtypes of kainate receptors we have designed and synthesized a series of (S)-2-amino-3-((2-carboxyethyl)phenyl)propanoic acid analogs with hydrogen bond donating and accepting substituents on the aromatic ring. Based on crystal s...

1,3-Dimethyl-4,5-di(ureido)-substituted imidazolidin-2-ones have been synthesised by the nitrosation of 1,3-dimethyl-4,5-di(3-ethylureido)imidazolidin-2-one followed by the reactions of amines with the resulting 1,3-dimethyl-4,5-di(3-nitroso-3-ethylureido)imidazolidin-2-one, and the structure of...

Altered homocysteine metabolism is implicated as a pathogenic factor in atherogenesis, neoplasia, and aging. Hereditary enzymatic deficiencies and nutritional deficiencies of folate, pyridoxine, or cobalamin are associated with elevated blood homocysteine, accelerated atherosclerosis, and manife...

To study the effects of homocysteine on epithelial and stromal tissues, the free base of homocysteine thiolactone was synthesized and administered to mice. Intraperitoneal and intramuscular doses of 0.2 to 2.0 mg/g are acutely toxic, causing as much as 90% mortality because of intense tissue nec...

In order to study the relation of homocysteine and lipid metabolism to atherogenesis, rabbits were fed a synthetic atherogenic diet and treated with parenteral thioretinaco (N-homocysteine thiolactonyl retinamido cobalamin), thioretinamide (N-homocysteine thiolactonyl retinamide) or homocysteine...

Vasopressin and oxytocin cause behavioral excitation after intracerebroventricular injection in mice. This effect is short-lasting, suggesting that the peptides are rapidly inactivated in the brain. Co-injection of microgram amounts of amastatin, an aminopeptidase inhibitor, prolonged the effect...

A study was made of the uterotonic, antidiuretic and pressor activities and the effect on the isolated mammary gland of 6 deamino-oxytocin analogues not containing a disulphide bond: [1,6-α-deaminocystathionine] -oxytocin (deamino-carba1-oxytocin, Car-1 -OT), [6,1-β-deaminocystathionine] -oxyt...

Deamino-oxytocin and some of its ‘carba’ analogues have a protracted effect on the rat uterus in vivo. Comparison of the elimination constants of the individual analogues of oxytocin and of deamino-oxytocin shows that the lower elimination rate of the analogues depends on the absence of the am...

Mannitol metabolism in fungi is thought to occur through a mannitol cycle first described in 1978. In this cycle, mannitol 1-phosphate 5-dehydrogenase (EC 1.1.1.17) was proposed to reduce fructose 6-phosphate into mannitol 1-phosphate, followed by dephosphorylation by a mannitol 1-phosphatase (E...

Trehalose, mannitol and arabitol are the main saccharides of extant fungal metabolism, but their occurrence and distribution in geological materials have rarely been considered. Here, we identify these sugars in Miocene lignites and for the first time in Late Cretaceous mudstones and coals. The ...