摘要:
The present invention provides modified platelets having a reduced platelet clearance and methods for reducing platelet clearance. Also provided are compositions for the preservation of platelets. The invention also provides methods for making a pharmaceutical composition containing the modified platelets and for administering the pharmaceutical composition to a mammal to mediate hemostasis.
摘要:
A novel gene defining a novel enzyme UDP-galactose: β-D-galactose-R 4-α-D-galactosyltransferase, termed α4Gal-T1, with unique enzymatic properties is disclosed. The invention provides isolated DNA molecules and DNA constructs encoding α4Gal-T1 and derivatives thereof by way of amino acid deletion, substitution or insertion exhibiting α4Gal-T1 activity, as well as cloning and expression vectors including such DNA, host cells comprising DNA encoding α4Gal-T1, and recombinant methods for providing α4Gal-T1. The enzyme α4Gal-T1 and α4Gal-active derivatives thereof are disclosed. Further, the invention discloses methods of obtaining α1, 4galactosyl glycosylated glycosphingolipids by use of an enzymatically active α4Gal-T1 protein thereof or by using cells stably transfected with a vector including DNA encoding an enzymatically active α4Gal-T1 protein as an expression system for recombinant production of such glycosphingolipids. Also a method for the identification of DNA sequence variations in the α4Gal-T1-coding exon by PCR, and detecting the presence of DNA sequence variation, are disclosed.
摘要:
The present invention provides polypeptides that include an O-linked glycosylation site that is not present in the wild-type peptide. The polypeptides of the invention include glycoconjugates in which a species such as a water-soluble polymer, a therapeutic agent of a biomolecule is covalently linked through an intact O-linked glycosyl residue to the polypeptide. Also provided are methods of making the peptides of the invention and methods, pharmaceutical compositions containing the peptides and methods of treating, ameliorating or preventing diseased in mammals by administering an amount of a peptide of the invention sufficient to achieve the desired response.
摘要:
The present invention relates to mutants of human growth hormone, which contain newly introduced N-linked or O-linked glycosylation site(s), such that these recombinantly produced polypeptides have glycosylation patterns distinctly different from that of the naturally occurring human growth hormone. The polynucleotide coding sequences for the mutants, expression cassettes comprising the coding sequences, cells expressing the mutants, and methods for producing the mutants are also disclosed. Further disclosed are pharmaceutical compositions comprising the mutants and method for using the mutants.
摘要:
A novel gene defining a novel human UDP-GlcNAc: Galβ1-3GalNAcα β1,6GlcNAc-transferase, termed C2GnT3, with unique enzymatic properties is disclosed. The enzymatic activity of C2GnT3 is shown to be distinct from that of previously identified enzymes of this gene family. The invention discloses isolated DNA molecules and DNA constructs encoding C2GnT3 and derivatives thereof by way of amino acid deletion, substitution or insertion exhibiting C2GnT3 activity, as well as cloning and expression vectors including such DNA, cells transfected with the vectors, and recombinant methods for providing C2GnT3. The enzyme C2GnT3 and C2GnT3-active derivatives thereof are disclosed, in particular soluble derivatives comprising the catalytically active domain of C2GnT3. Further, the invention discloses methods of obtaining 1,6-N-acetylglucosaminyl glycosylated saccharides, glycopeptides or glycoproteins by use of an enzymically active C2GnT3 protein or fusion protein thereof or by using cells stably transfected with a vector including DNA encoding an enzymatically active C2GnT3 protein as an expression system for recombinant production of such glycopeptides or glycoproteins. Methods are disclosed for the identification of agents with the ability to inhibit or stimulate the biological activity of C2GnT3. Furthermore, methods of using C2GnT3 in the structure-based design of inhibitors or stimulators thereof are also disclosed in the invention. Also a method for the identification of DNA sequence variations in the C2GnT3 gene by isolating DNA from a patient, amplifying C2GnT3-coding exons by PCR, and detecting the presence of DNA sequence variation, are disclosed.
摘要:
A novel gene defining a novel human UDP-GlcNAc: Gal/Gl cNAcβ 1-3GalNAc αβ1, 6GlcNAc-transferase, termed C2/4GnT, with unique enzymatic properties is disclosed. The enzymatic activity of C2/4GnT is shown to be distinct from that of previously identified enzymes of this gene family. The invention discloses isolated DNA molecules and DNA constructs encoding C2/4GnT and derivatives thereof by way of amino acid deletion, substitution or insertion exhibiting C2/4GnT activity, as well as cloning and expression vectors including such DNA, cells transfected with the vectors, and recombinant methods for providing C2/4GnT. The enzyme C2/4GnT and C2/4GnT-active derivatives thereof are disclosed, in particular soluble derivatives comprising the catalytically active domain of C2/4GnT. Further, the invention discloses methods of obtaining 1,6-N-acetyl glucosaminyl glycosylated saccharides, glycopeptides or glycoproteins by use of an enzymically active C2/4GnT protein or fusion protein thereof or by using cells stably transfected with a vector including DNA encoding an enzymatically active C2/4GnT protein as an expression system for recombinant production of such glycopeptides or glycoproteins. Also a method for the identification for the identification of DNA sequence variations in the C2/4GnT gene by isolating DNA from a patient, amplifying C2/4GnT-coding exons by PCR, and detecting the presence of DNA sequence variation are disclosed.
摘要:
A novel gene defining a novel enzyme in the UDP-D-galactose: &bgr;-N-acetyl-glucosamine &bgr;-1,4-galactosyltransferase family, termed &bgr;4Gal-T2, with unique enzymatic properties is disclosed. The enzymatic activity of &bgr;4Gal-T2 is shown to be distinct from that of previously identified enzymes of this gene family. The invention discloses isolated DNA molecules and DNA constructs encoding &bgr;4Gal-T2 and derivatives thereof by way of amino acid deletion, substitution or insertion exhibiting &bgr;4Gal-T2 activity, as well as cloning and expression vectors including such DNA, cells transfected with the vectors, and recombinant methods for providing &bgr;4Gal-T2. The enzyme &bgr;4Gal-T2 and &bgr;4Gal-T2-active derivatives thereof are disclosed, in particular soluble derivatives comprising the catalytically active domain of &bgr;4Gal-T2. Further, the invention discloses methods of obtaining &bgr;-1,4-galactosyl glycosylated saccharides, glycopeptides or glycoproteins by use of an enzymically active &bgr;4Gal-T2 protein or fusion protein thereof or by using cells stably transfected with a vector including DNA encoding an enzymatically active &bgr;4Gal-T2 protein as an expression system for recombinant production of such glycopeptides or glycoproteins. Also a method for the identification of DNA sequence variations in the &bgr;4Gal-T2 gene by isolating DNA from a patient, amplifying &bgr;4Gal-T2-coding exons by PCR, and detecting the presence of DNA sequence variation, are disclosed.
摘要:
A vaccine and method to prevent growth and replication of cancer cells that express a core structure of a mucin-type glycoprotein is disclosed. The vaccine comprises: (a) a pharmaceutically effective amount of an antigen comprising a purified mucin-type glycoprotein or a chemically synthesized mucin-type glycoprotein carbohydrate determinant conjugated to a carrier peptide or macromolecule, wherein said mucin-type glycoprotein expresses or carries the core structure of a mucin-type glycoprotein expressed on said cancer cells; and (b) a pharmaceutically acceptable carrier including natural or synthetic adjuvants. The method comprises administering the above-described vaccine to a host. A medicament and method for treating cancer wherein the cancer cells express a core structure of a mucin-type glycoprotein is disclosed. The medicament comprises: (a) a pharmaceutically effective amount of an anti-cancer antibody or fragment comprising a binding site thereof, said anti-cancer antibody having been produced against a purified core structure of a mucin-type glycoprotein; and (b) a pharmaceutically acceptable carrier, diluent or excipient. The method comprises administering the above-described medicament to a host.
摘要:
A method of producing monoclonal antibodies that bind to tumor-associated gangliosides, the method comprising: (1) immunizing a host with tumor cells; (2) boosting the host with a suspension comprising a mixture of tumor cell membrane and at least one purified lactonized tumor-associated ganglioside; (3) boosting the host with an immunogen comprising a lactone of a tumor associated ganglioside adsorbed on or incorporated into a carrier; (4) fusing immunized cells from the host with myeloma cells to form hybridoma cells; (5) selecting hybridoma cells that produce antibody that binds to the ganglioside of step (3); (6) culturing the selected hybridoma cells; and (7) recovering the antibody.
摘要:
The present invention provides modified platelets having a reduced platelet clearance and methods for reducing platelet clearance. Also provided are compositions for the preservation of platelets. The invention also provides methods for making a pharmaceutical composition containing the modified platelets and for administering the pharmaceutical composition to a mammal to mediate hemostasis.