The current invention reports a method for purifying an antibody by reducing the content of a host cell protein. The method employs a wash step with a low conductivity aqueous solution in an affinity chromatography.

Provided herein, in some aspects, are compositions comprising vasoocclusion-inhibiting agents encapsulated in RBCs and uses thereof for treating blood vessel occlusion (e.g., in Sickle Cell Disease).

Herein is reported a method for producing a human IgG4 or IgG1 isotype antibody comprising the following steps a) cultivating a cell comprising a nucleic acid encoding a human IgG4 or IgG1 isotype antibody, b) recovering the human IgG4 or IgG1 isotype antibody from the cell or the cultivation medium, c) contacting the human IgG4 or IgG1 isotype antibody with a protein A chromatography material, d) washing the protein A chromatography material with an aqueous solution comprising Histidine and Tris, e) recovering the human IgG4 or IgG1 isotype antibody from the protein A chromatography material and thereby producing the human IgG4 or IgG1 isotype antibody.

As described herein, a method of inhibiting metastasis in cancer includes administering to a human subject diagnosed with a cancer of an organ of the peritoneal cavity a therapeutically effective amount of an inhibitor of CCR5 or P-selectin. Preferably the subject has a tumor positive for a ligand of P-selectin such as a CD24+ or PSGL-1+ tumor. Analysis of samples from HGSOC patients confirmed increased MIP-1β and P-selectin, suggesting that this novel multi-cellular mechanism can be targeted to slow or stop metastasis in cancers such as high-grade serous ovarian cancer, for example by using anti-CCR5 and P-selectin therapies developed for other indications.

Provided herein are engineered cells, comprising: a chemical or biological moiety covalently bound to a cell surface glycan, wherein the chemical or biological moiety is selected from the group consisting of small molecule, polynucleotide, polypeptide, and antibody. Also provided are compositions comprising these engineered cells and methods of making and using the same.

A multifunctional polypeptide chain or a protein. A polypeptide chain X, comprising an antigen 1 binding domain R1, an auxiliary peptide chain linking domain R2 and an antigen 2 binding domain R3. The auxiliary peptide chain linking domain R2 is a cytokine or a cytokine binding domain in a cytokine receptor. A protein, which is a heterodimer composed of the polypeptide chain X as a main peptide chain and an auxiliary peptide chain Y. The auxiliary peptide chain Y comprises an antigen 3 binding domain R4 and a main peptide chain X linking domain R5, or the auxiliary peptide chain Y is the main peptide chain linking domain R5. The multifunctional protein mediates specific cell killing by binding to different tumor antigens with the two antigen binding domains of tumor-associated antigens therein. The multifunctional protein can function as a cytokine by introducing a cytokine or a cytokine receptor complex.

Provided herein are engineered cells, comprising: a chemical or biological moiety covalently bound to a cell surface glycan, wherein the chemical or biological moiety is selected from the group consisting of small molecule, polynucleotide, polypeptide, and antibody. Also provided are compositions comprising these engineered cells and methods of making and using the same.

Disclosed herein are immunoglobulin fusion proteins comprising an insulin therapeutic peptide and an immunoglobulin region that targets the insulin therapeutic peptide to the liver of an individual in need thereof. Further disclosed herein are compositions comprising the immunoglobulin fusion proteins and methods for using the immunoglobulin fusion proteins for the treatment or prevention of a disease or condition in a subject, for example, diabetes and diabetes related conditions.

An interleukin which binds to IL-2 receptor (IL-2R), or a nucleotide sequence encoding therefor, wherein the interleukin or nucleotide sequence is adapted to be targeted to the liver.

A method of reducing or inhibiting migration of HIV-infected CD4+ T cells to tissues comprises contacting the infected cells with a ligand that prevents or inhibits the interaction between a T cell-surface fucosylated glycan and its glycan-binding protein or with a molecule that metabolically inhibits glycosylation or fucosylation in said cell. In vitro and in vivo methods are described. Also described is a diagnostic method employing labeled ligands that bind a fucosylated glycan and provide a signal detectable by non-invasive imaging.