32 results about "Factor XIII" patented technology

Proteins are incorporated into protein or polysaccharide matrices for use in tissue repair, regeneration and/or remodeling and/or drug delivery. The proteins can be incorporated so that they are released by degradation of the matrix, by enzymatic action and/or diffusion. As demonstrated by the examples, one method is to bind heparin to the matrix by either covalent or non-covalent methods, to form a heparin-matrix. The heparin then non-covalently binds heparin-binding growth factors to the protein matrix. Alternatively, a fusion protein can be constructed which contains a crosslinking region such as a factor XIIIa substrate and the native protein sequence. Incorporation of degradable linkages between the matrix and the bioactive factors can be particularly useful when long-term drug delivery is desired, for example in the case of nerve regeneration, where it is desirable to vary the rate of drug release spatially as a function of regeneration, e.g. rapidly near the living tissue interface and more slowly farther into the injury zone. Additional benefits include the lower total drug dose within the delivery system, and spatial regulation of release which permits a greater percentage of the drug to be released at the time of greatest cellular activity.

A method for determining whether an individual is at an increased risk for myocardial infarction, comprising screening for the presence of Factor II and Factor XIII alleles associated with myocardial infarction. Also provided are kits and primers that specifically hybridize adjacent to the allele-specific regions of the Factor II and Factor XIII genes.

Process for separating proteins fibrinogen, Factor XIII and biological glue from a solubilized plasma fraction and for preparing lyophilised concentrates of said proteins

Summary

The invention is related to a process for separating proteins fibrinogen, Factor XIII and biological glue from a solubilized plasma fraction and for preparing freeze-dried concentrates of said proteins comprising the steps of:

• • chromatographic purification comprising the steps of loading an anion exchanger of weak base type with the said solubilized fraction, previously equilibrated with a buffer of a predetermined ionic strength of an alkaline pH, which allows to retain the biological glue, elution of the biological glue by increasing the ionic strength of the said buffer, and
  • separation of FXIII from fibrinogen by addition to at least one part of the biological glue eluate of at least one chemical agent precipitating the FXIII, and recovery of the resulting purified fibrinogen containing supernatant solution, and
  • diafiltration of the fibrinogen, biological glue and resolubilized FXIII solutions, followed by a freeze-drying of said solutions. It is also related to freeze-dried concentrates of the said proteins capable to be obtained by carrying out the process.

The present invention relates to the use of a factor VIIa and a factor XIII in the treatment or pro-phylaxis of bleeding episodes.

Proteins are incorporated into protein or polysaccharide matrices for use in tissue repair, regeneration and/or remodeling and/or drug delivery. The proteins can be incorporated so that they are released by degradation of the matrix, by enzymatic action and/or diffusion. As demonstrated by the examples, one method is to bind heparin to the matrix by either covalent or non-covalent methods, to form a heparin-matrix. The heparin then non-covalently binds heparin-binding growth factors to the protein matrix. Alternatively, a fusion protein can be constructed which contains a crosslinking region such as a factor XIIIa substrate and the native protein sequence. Incorporation of degradable linkages between the matrix and the bioactive factors can be particularly useful when long-term drug delivery is desired, for example in the case of nerve regeneration, where it is desirable to vary the rate of drug release spatially as a function of regeneration, e.g. rapidly near the living tissue interface and more slowly farther into the injury zone. Additional benefits include the lower total drug dose within the delivery system, and spatial regulation of release which permits a greater percentage of the drug to be released at the time of greatest cellular activity.

Provided are degradation-resistant fibrinogen sealants comprising a first composition comprising one or more of fibrinogen γA/γ′ heterodimers and/or fibrinogen γ′/γ′ homodimers and a second composition comprising thrombin and, optionally, degradation-resistant fibrinogen sealants disclosed herein may further comprise Factor XIII and calcium. Degradation-resistant fibrinogen sealants are suitable for the treatment of trauma, particularly vascular trauma.

The present disclosure provides compositions and methods that are useful for normalizing the amount of signal detected in an assay, such as an immunoassay. The compositions and methods are useful for improving the accuracy of immunoassays, such as immunoassays that detect whether a subject is infected with a retrovirus such as HIV.

Use of factor XIII for treating coumarin-induced hemorrhage or bleeding. The coumarin may be warfarin or dicoumarol. A patient having coumarin-induced bleeding is treated with factor XIII alone or in conjunction with vitamin K.

Use of factor XIII for inhibiting the formation of seromas by administering factor XIII. The factor XIII can be administered locally at the site of a wound or surgery or administered systemically. If the factor XIII is administered locally, it can be activated or non-activated and may be administered in conjunction with activated thrombin.