122711 results about "Molecular biology" 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.

Nucleosides and nucleotides are disclosed that are linked to detectable labels via a cleavable linker group.

Auristatin peptides, including MeVal-Val-Dil-Dap-Norephedrine (MMAE) and MeVal-Val-Dil-Dap-Phe (MMAF), were prepared and attached to Ligands through various linkers, including maleimidocaproyl-val-cit-PAB. The resulting ligand drug conjugates were active in vitro and in vivo.

The present invention relates generally to methods for stimulating cells, and more particularly, to a novel method to concentrate and stimulate cells that maximizes stimulation and/or proliferation of such cells. In the various embodiments, cells are stimulated and concentrated with a surface yielding enhanced proliferation, cell signal transduction, and/or cell surface moiety aggregation. In certain aspects methods for stimulating a population of cells such as T-cells, by simultaneous concentration and cell surface moiety ligation are provided by contacting the population of cells with a surface, that has attached thereto one or more agents that ligate a cell surface moiety and applying a force that predominantly drives cell concentration and cell surface moiety ligation, thereby inducing cell stimulation, cell surface moiety aggregation, and/or receptor signaling enhancement. Also provided are methods for producing phenotypically tailored cells, including T-cells for the use in diagnostics, drug discovery, and the treatment of a variety of indications, including cancer, viral infection, and immune related disorders. Compositions of cells having specific phenotypic properties produced by these processes are further provided.

The present invention relates generally to methods for stimulating cells, and more particularly, to a novel method to concentrate and/or stimulate cells that maximizes stimulation and/or proliferation of such cells. In the various embodiments, cells are stimulated and concentrated with a surface yielding enhanced proliferation, cell signal transduction, and/or cell surface moiety aggregation. In certain aspects methods for stimulating a population of cells such as T-cells, by simultaneous concentration and cell surface moiety ligation are provided by contacting the population of cells with a surface, that has attached thereto one or more agents that ligate a cell surface moiety and applying a force that predominantly drives cell concentration and cell surface moiety ligation, thereby inducing cell stimulation, cell surface moiety aggregation, and/or receptor signaling enhancement. Also provided are methods for producing phenotypically tailored cells, including T-cells for the use in diagnostics, drug discovery, and the treatment of a variety of indications, including cancer, viral infection, and immune related disorders. Compositions of cells having specific phenotypic properties produced by these processes are further provided.

The present invention provides methods of re-engineering or re-shaping an antibody from a first species, wherein the re-engineered or re-shaped antibody does not elicit undesired immune response in a second species, and the re-engineered or re-shaped antibody retains substantially the same antigen binding-ability of the antibody from the first species. In accordance with the present invention, a combinatorial library comprising the CDRs of the antibody from the first species fused in frame with framework regions derived from a second species can be constructed and screened for the desired modified antibody. In particular, the present invention provides methods utilizing low homology acceptor antibody frameworks for efficiently humanizing an antibody or a fragment thereof. The present invention also provides antibodies produced by the methods of the invention.

A bispecific antibody format providing ease of isolation is provided, comprising immunoglobulin heavy chain variable domains that are differentially modified in the CH3 domain, wherein the differential modifications are non-immunogenic or substantially non-immunogenic with respect to the CH3 modifications, and at least one of the modifications results in a differential affinity for the bispecific antibody for an affinity reagent such as Protein A, and the bispecific antibody is isolable from a disrupted cell, from medium, or from a mixture of antibodies based on its affinity for Protein A.

Disclosed are methods of producing eukaryotic disulfide bond-containing polypeptides in bacterial hosts, and compositions resulting therefrom. Co-expression of a eukaryotic foldase and a disulfide bond-containing polypeptide in a bacterial host cell is demonstrated. In particular embodiments, the methods have been used to produce mammalian pancreatic trypsin inhibitor and tissue plasminogen activator (tPA) in soluble, biologically-active forms, which are isolatable from the bacterial periplasm. Also disclosed are expression systems, recombinant vectors, and transformed host cells.

Embodiments of this invention provide methods, systems, and apparatus for determining whether a fetal chromosomal aneuploidy exists from a biological sample obtained from a pregnant female. Nucleic acid molecules of the biological sample are sequenced, such that a fraction of the genome is sequenced. Respective amounts of a clinically-relevant chromosome and of background chromosomes are determined from results of the sequencing. A parameter derived from these amounts (e.g. a ratio) is compared to one or more cutoff values, thereby determining a classification of whether a fetal chromosomal aneuploidy exists.

The invention relates to the fields of screening assays, compounds, and methods for altering gene expression and protein levels. In particular, the invention includes assays to screen for agents capable of modulating gene expression in a UTR-dependent manner and agents capable of modulating gene expression.

The invention relates to PD-1 antibodies and PD-L1 antibodies and uses thereof.

In the course of the present invention, it was discovered that one could regulate association between polypeptides by modifying amino acid residues that form the interface during the association to amino acids carrying the same type of charge. In this context, the present invention enables efficient formation of heterologous molecules. For example, the present invention can be suitably applied to the preparation of bispecific antibodies.

Drug-Linker-Ligand Conjugates are disclosed in which a Drug is linked to a Ligand via a peptide-based Linker unit. In one embodiment, the Ligand is an Antibody. Drug-Linker compounds and Drug compounds are also disclosed. Methods for treating cancer, an autoimmune disease or an infectious disease using the compounds and compositions of the invention are also disclosed.

Multimolecular devices and drug delivery systems prepared from synthetic heteropolymers, heteropolymeric discrete structures, multivalent heteropolymeric hybrid structures, aptameric multimolecular devices, multivalent imprints, tethered specific recognition devices, paired specific recognition devices, nonaptameric multimolecular devices and immobilized multimolecular structures are provided, including molecular adsorbents and multimolecular adherents, adhesives, transducers, switches, sensors and delivery systems. Methods for selecting single synthetic nucleotides, shape-specific probes and specifically attractive surfaces for use in these multimolecular devices are also provided. In addition, paired nucleotide-nonnucleotide mapping libraries for transposition of selected populations of selected nonoligonucleotide molecules into selected populations of replicatable nucleotide sequences are described.

Bispecific antibodies comprising (a) a first light-heavy chain pair having specificity for a first target and a sufficient number of substitutions in its heavy chain constant domain with respect to a corresponding wild-type antibody of the same isotype to significantly reduce the formation of first heavy chain-first heavy chain dimers and (b) a second light-heavy chain pair comprising a heavy chain having a sequence that is complementary to the sequence of the first pair heavy chain sequence with respect to the formation of intramolecular ionic interactions, wherein the first pair or second pair comprises a substitution in the light chain and complementary substitution in the heavy chain that reduces the ability of the light chain to interact with the heavy chain of the other light chain-heavy chain pair are provided. Methods of producing such antibodies in one or more cells also are provided.