232 results about "N-Acetylglucosamine" patented technology

A cell in which genome is modified so as to have a more decreased or deleted activity of an enzyme relating to modification of a sugar chain in which 1-position of fucose is bound to 6-position of N-acetylglucosamine in the reducing end through alpha-bond in a complex N-glycoside-linked sugar chain than its parent cell, and a process for producing an antibody composition using the cell.

A method for enhancing a binding activity of an antibody composition to Fcgamma receptor IIIa, which comprises modifying a complex N-glycoside-linked sugar chain which is bound to the Fc region of an antibody molecule; a method for enhancing an antibody-dependent cell-mediated cytotoxic activity of an antibody composition; a process for producing an antibody composition having an enhanced binding activity to Fcgamma receptor IIIa; a method for detecting the ratio of a sugar chain in which fucose is not bound to N-acetylglucosamine in the reducing end in the sugar chain among total complex N-glycoside-linked sugar chains bound to the Fc region in an antibody composition; an Fc fusion protein composition produced by using a cell resistant to a lectin which recognizes a sugar chain in which 1-position of fucose is bound to 6-position of N-acetylglucosamine in the reducing end through alpha-bond in a complex N-glycoside-linked sugar chain; and a process for producing the same.

The present invention relates to methods and compositions comprising at least one endothelin antagonist, preferably in combination with a poly- beta -1->4-N-acetylglucosamine (p-GlcNAc) polysaccharide matrix, for use in the treatment of cancer and other proliferative diseases. The endothelin antagonist can be a peptide or non-peptide compound, and the p-GlcNAc matrix of the invention is comprised of a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a beta -1->4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. The compositions and methods of the invention are useful for inhibiting the growth of tumors and other neoplastic cells and/or for inhibiting the metastasis of neoplastic cells in vivo.

The present invention relates to a cell into which an RNA capable of suppressing the function of an enzyme catalyzing a reaction which converts GDP-mannose into GDP-4-keto,6-deoxy-GDP-mannose is introduced; a process for producing a glycoprotein using the cell; a cell into which an RNA capable of suppressing the function of an enzyme relating to modification of a sugar chain in which 1-position of fucose is bound to 6-position of N-acetylglucosamine in the reducing end through α-bond in the complex type N-glycoside-linked sugar chain, and an RNA capable of suppressing the function of an enzyme relating to synthesis of an intracellular sugar nucleotide, GDP-fucose, or an RNA capable of suppressing the function of a protein relating to transport of an intracellular sugar nucleotide, GDP-fucose, to the Golgi body are introduced; a process for producing a glycoprotein composition using the cell; and the like.

The present invention provides an antibody composition comprising an antibody molecule which specifically binds to human CC chemokine receptor 4 (CCR4) and has complex type N-glycoside-linked sugar chains in the Fc region, wherein the complex type N-glycoside-linked sugar chains have a structure in which fucose is not bound to N-acetylglucosamine in the reducing end in the sugar chains; a transformant which produces the antibody composition; a process for producing the antibody composition; and a pharmaceutical composition comprising the antibody composition.

This invention relates to transgenically produced human Antithrombin III (tgATIII). The human ATIII produced by the transgenic process of the present invention has a monosaccharide composition which comprises N-acetylgalactosamine (GalNAc) along with fucose, N-acetylglucosamine, galactose, mannose, and N-acetylneuraminic acid/N-glycolyneuraminic acid. The monosaccharide composition differs with that of plasma derived ATIII (phATIII). It has been found that tgATIII has an increased clearance rate when compared to phATIII.

An unbranched polylactosamine comprising at least 6 monosaccharides and having terminal alpha 2->3 sialylation and internal alpha 1->3 fucosylation at various N-acetylglucosamine residues except for solely at the penultimate N-acetylglucosamine residue.

A 3-branched asparagine-linked oligosaccharide derivative of the formula (1) wherein the nitrogen of amino group of asparagine is modified with a lipophilic protective group, biotin group or FITC group; a 3-branched asparagine-linked oligosaccharide derivative which contains at least one fucose in N-acetylglucosamine on the nonreducing terminal side of the asparagine-linked oligosaccharide of the derivative; asparagine-linked oligosaccharides and oligosaccharides thereof

wherein Q is a lipophilic protective group, biotin group or FITC group.

The present invention relates to a purified, easily produced poly-beta-1->4-N-acetylglucosamine (p-GlcNAc) polysaccharide species. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a beta-1->4 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. In addition, derivatives and reformulations of p-GlcNAc are described. The present invention further relates to methods for the purification of the p-GlcNAc of the invention from microalgae, preferably diatom, starting sources. Still further, the invention relates to methods for the derivatization and reformulation of the p-GlcNAc. Additionally, the present invention relates to the uses of pure p-GlcNAc, its derivatives, and/or its reformulations.

A medicament for treating a patient who cannot be cured with a medicament comprising as an active ingredient an antibody composition produced by a cell unresistant to a lectin which recognizes a sugar chain in which 1-position of fucose is bound to 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked sugar chain, which comprises as an active ingredient an antibody composition produced by a cell resistant to a lectin which recognizes a sugar chain in which 1-position of fucose is bound to 6-position of N-acetylglucosamine in the reducing end through α-bond in a complex N-glycoside-linked sugar chain, and a method for screening the patient by using the medicament.

The present invention relates to compositions comprising complexes of human cells and polymer fibers and methods of their use for therapeutic purposes. Methods of making such compositions are also provided. The presen t invention encompasses compositions comprising poly-.beta.-1.fwdarw.4-N-acetylglucosamine polymers and stored platelets and their use for promoting wound healing and achieving hemostasis.

The invention provides genetically engineered bacteria for efficiently producing N-acetylglucosamine. The genetically engineered bacteria are prepared by the following steps: integrating chromosome deficiency nag DCABE gene clusters of Escherichia coli, respectively connecting 6-glucosamine phosphate synthetase mutant genes and N-acetylglucosamine transferase genes which are respectively mediated by a T7 promoter and a Trc promoter with a gene expression cassette in series, wherein the 6-glucosamine phosphate synthetase mutant genes are obtained by mutating wild 6-glucosamine phosphate synthetase genes from an Escherichia coli W3110 strain source into A38T/R249C/G471S mutants. The genetically engineered bacteria constructed by the invention have the advantages of high N-acetylglucosamine fermentation yield and high strain stability and have wide industrial application prospects.

The present invention relates to an antibody comprising a GlcNAc-S(A)_x substituent, wherein S(A)_x is a sugar derivative comprising x functional groups A wherein A is independently selected from the group consisting of an azido group, a keto group and an alkynyl group and x is 1, 2, 3 or 4, wherein said GlcNAc-S(A)_x substituent is bonded to the antibody via CI of the N-acetylglucosamine of said GlcNAc-S(A)_x substituent, and wherein said N-acetylglucosamine is optionally fucosylated. The invention also relates to an antibody-conjugate, in particular to an antibody-conjugate according to the Formula (20) or (20b), wherein AB is an antibody, S is a sugar or a sugar derivative, D is a molecule of interest, and wherein said N-acetylglucosamine is optionally fucosylated (b is 0 or 1). The invention further relates to a process for the preparation of a modified antibody, to a process for the preparation of an antibody-conjugate, and to said antibody-conjugate for use as a medicament. In addition, the invention relates to a kit of parts comprising an azide-modified antibody and a linker-conjugate, wherein said linker-conjugate comprises a (hetero)cycloalkynyl group and one or more molecules of interest.

There is disclosed a method for producing an L-amino acid, for example L-threonine, L-lysine, L-histidine, L-phenylalanine, L-arginine, L-tryptophan, or L-glutamic acid, using a bacterium of the Enterobacteriaceae family, wherein the bacterium has been modified to enhance an activity of N-acetylglucosamine permease encoded by the nagE gene.

The invention belongs to the construction and the application of genetically engineered bacterium and particularly relates to bacillus subtilis for producing N-acetylglucosamine as well as a construction method and application of bacillus subtilis. The construction method for the genetically engineered bacterium (bacillus subtilis) comprises the following steps: expressing and coding 6-glucosamine phosphate synthetase gene and 6-glucosamine phosphate acetylase gene in bacillus subtilis to form a complete metabolic pathway from glucose to N-acetylglucosamine; knocking out or inactivating glucosamine 6-phosphate deaminase genes nagB and gamA, an N-acetylglucosamine 6-phosphate deacetylase gene nagA, a glucosamine transport protein gene gamP and an N-acetylglucosamine transport protein gene nagP in an N-acetylglucosamine catabolism pathway in bacillus subtilis. The construction method can be used for solving the problem that N-acetylglucosamine produced in the prior art is poor in safety, low in yield and high in cost. The constructed genetically engineered bacterium has the advantage that N-acetylglucosamine with relatively high concentration can be accumulated, and the industrial utilization value is relatively high.

The invention provides a humanized modified anti-CD147 chimeric antibody HcHAb18 and an application thereof. The anti-CD147 human-rat chimeric antibody is prepared on the basis of obtaining hybridoma cells of an anti-human CD147 monoclonal antibody and antibody HcHAb18 genes of the hybridoma cells, wherein the variable region of light chains of the anti-CD147 human-rat chimeric antibody has the amino acid sequence shown in SEQ ID NO:1; the variable region of heavy chains of the anti-CD147 human-rat chimeric antibody has the amino acid sequence shown in SEQ ID NO:2; fucose are not combined in N-acetylglucosamine in a reducing end of a carbohydrate chain at a Fc segment of the anti-CD147 monoclonal antibody in a specific host cell; the glycoform of the anti-CD147 monoclonal antibody is of a mannose type (MAN 5); the anti-CD147 chimeric antibody has antibody dependent cell-mediated cytotoxicity (ADCC). The invention further provides an expression vector and an engineering cell strain of the anti-CD147 chimeric antibody and the application of the anti-CD147 chimeric antibody taken as a cancer treating medicine.

The present invention relates to compositions comprising semi-crystalline beta-1-4-N-acetylglucosamine polymers (p-GlcNac) and methods utilizing such polymers modulation of vascular structure and/or function. The compositions and methods disclosed are useful for stimulating, in a p-GlcNac concentration-dependent manner, endothelin-1 release, vasoconstriction, and/or reduction in blood flow out of a breached vessel, as well as for contributing to or effecting cessation of bleeding. The methods of the present invention comprise topical administration of materials comprising semi-crystalline p-GlcNac polymers that are free of proteins, and substantially free of single amino acids as well as other organic and inorganic contaminants, and whose constituent monosaccharide sugars are attached in a beta-1-4 conformation.