Herein is reported an expression vector comprisingan antibody light chain expression cassette, an antibody heavy chain expression cassette, anda selection marker expression cassette, wherein the expression cassettes are arranged unidirectional, and wherein the expression cassettes are arranged in the 5 to 3 sequence of antibody heavy chain expression cassette, antibody light chain expression cassette and selection marker expression cassette. Further are reported herein methods for the generation of antibody producing cells and the use of these cells for the recombinant production of antibodies.

The present disclosure provides, inter alia, anti-peripheral lymph node addressin antibodies and antigen binding fragments thereof. The present disclosure also provides compositions comprising drug-containing polymeric particles that mimic lymphocyte migration in vivo and can specifically deliver immunosuppressive or immunoregulatory drugs to lymphoid tissues and sites of chronic inflammation where T-cell activation and T-cell mediated injury are occurring; such compositions comprise the antibodies or antigen-binding fragments thereof described in the disclosure. The present disclosure also comprises antibody-drug conjugates and compositions comprising the antibody-drug conjugates. Methods of preparing and using these antibodies, antigen-binding fragments thereof, and compositions thereof are also provided.

The current invention is directed to an antibody comprising at least four binding sites specifically binding to an immunoglobulin Fc-region of the human IgG1 subclass comprising one, two, three or four amino acid changes compared to a wild-type Fc-region of the human IgG1 subclass for use as positive control and calibration standard in an immunoassay for the detection and quantification of anti-drug antibodies against said one, two, three or four amino acid changes in the Fc-region of the drug antibody.

A method of treating brain-metastasized cancer in a subject in need thereof is disclosed. The method comprises administering to the subject a therapeutically effective amount of an agent that specifically decreases an amount and/or activity of P-selectin and an immunomodulatory agent. Methods of treating additional cancers are also disclosed.

The invention provides anti-PMEL17 antibodies and immunoconjugates and methods of using the same.

The present invention relates to the seminal discovery that P-selectin glycoprotein ligand-1 (PSGL-1) modulates the immune system and immune responses. Specifically, the present invention provides PSGL-1 agonists and antagonists which increase the survival of multifunctional T cells and viral clearance. The present invention further provides methods of treating infectious diseases, cancer and immune and inflammatory diseases and disorders using a PSGL-1 modulator.

The current invention reports a method for the recombinant production of a secreted heterologous immunoglobulin in a CHO cell comprising the following steps: i) providing a CHO cell, which is adapted to growth in suspension culture, adapted to growth in serum-free medium, mycoplasma free, and virus free, ii) providing a vector comprising a prokaryotic origin of replication, a first nucleic add conferring resistance to a prokaryotic selection agent, a second nucleic acid encoding the heavy chain of said heterologous immunoglobulin, a third nucleic acid encoding the light chain of said heterologous immunoglobulin, a fourth nucleic acid conferring resistance to a eukaryotic selection agent, iii) transfecting said CHO cell, wherein said transfecting comprises a) transfecting said CHO cell with said vector comprising a fourth nucleic acid conferring resistance to a first eukaryotic selection agent, h) selecting a CHO cell by growth in cultivation medium containing said first eukaryotic selection agent, c) transfecting said selected CHO cell with said vector comprising a fourth nucleic acid conferring resistance to a second eukaryotic selection agent different to said first eukaryotic selection agent, d) selecting a CHO cell by selected growth in cultivation medium containing said first and said second eukaryotic selection agent, iv) cultivating said transfected CHO cell in a medium in the presence of said first and second eukaryotic selection agent, under conditions suitable for the expression of said second, and third nucleic acid, and v) recovering said secreted heterologous immunoglobulin from the cultivation medium.

The invention provides anti-PMEL17 antibodies and immunoconjugates and methods of using the same.

The invention features antibodies, e.g., chimeric and humanized antibodies, that recognize (i.e., bind) P-selectin. The P-selectin antibodies prevent P-selectin from binding to its cognate receptor. The P-selectin antibodies can be used to treat inflammatory and thrombotic conditions, e.g., sickle cell disease, pain crisis associated with sickle cell disease, deep vein thrombosis, asthma, rheumatoid arthritis, psoriasis, and ischemia reperfusion injury in a patient in need thereof.

The present disclosure provides, inter alia, anti-peripheral lymph node address in antibodies and antigen binding fragments thereof. The present disclosure also provides compositions comprising drug-containing polymeric particles that mimic lymphocyte migration in vivo and can specifically deliver immunosuppressive or immunoregulatory drugs to lymphoid tissues and sites of chronic inflammation where T-cell activation and T-cell mediated injury are occurring; such compositions comprise the antibodies or antigen-binding fragments thereof described in the disclosure. The present disclosure also comprises antibody-drug conjugates and compositions comprising the antibody-drug conjugates. Methods of preparing and using these antibodies, antigen-binding fragments thereof, and compositions thereof are also provided.