Provided are an artificial multi-antigen fusion protein and a preparation method thereof. The fusion protein can effectively stimulate CD8+T and CD4+ T cell immunities, and can be applied to immunodiagnostics or serve as a prophylactic or therapeutic vaccine.

Cell-based compositions and methods for targeting and treating human diseases, including cancers and infectious diseases, are provided, wherein exogenous intracellular sarcosine is used for improved delivery of the composition.

The invention is in the field of cell biology and immunology. The invention provides methods for the production of a vaccine for cancer and infectious diseases. More in particular it provides a method for the improved production of mature dendritic cells. This improved production includes the use of a bacterial lysate produced by a new method.

The present disclosure relates to a composition for preventing or treating metabolic diseases, in which the composition includes Bacteroides acidifaciens as an active ingredient. In addition, the present disclosure relates to a composition for oxidizing fat or inhibiting DPP-4, in which the composition includes Bacteroides acidifaciens as an active ingredient. In addition, the present disclosure relates to a transformant expressing a lean phenotype, in which an Atg7 gene is deleted in dendritic cells.

The present invention provides a method for preparing dendritic cell loaded with antigen, the method comprising the steps of adding serum-free cell culture medium containing granulocyte-macrophage colony-stimulating factor (GM-CSF) and inter-leukin (IL)-4 into mononuclear cells, culturing in an incubator at 37° C. under 5% carbon dioxide for 5 days, adding target antigen wrapped cationic liposome and culturing for 8-24 hours to obtain target antigen loaded dendritic cell.

Compositions and methods are provided for converting the predominant circulating classical monocytes to a non-classical and/or intermediate monocyte phenotype through cytokine stimulation via, for example, macrophage colony-stimulating factor. Once cultured into dendritic cells, these non-classical and/or intermediate monocyte derived cells have increased costimulatory molecule expression, which leads to improved immune and clinical responses in cancer patients receiving dendritic cell vaccination and other immunotherapies. In addition, assays and diagnostic and theranostic methods are provided herein that relate to the discoveries that, prior to treatment, intermediate (CD14+CD16+) and non-classical (CD14dimCD16+) monocytes are increased more than two-fold in patients who later had complete responses to dendritic cell therapy or DC vaccination.

In some embodiments, compositions and methods relating to isolated artificial antigen presenting cells (aAPCs) are disclosed, including aAPCs comprising a myeloid cell transduced with one or more viral vectors, such as a MOLM-14 or a EM-3 myeloid cell, wherein the myeloid cell endogenously expresses HLA-AB/C, ICOS-L, and CD58, and wherein the one or more viral vectors comprise a nucleic acid encoding CD86 and a nucleic acid encoding 4-1BBL and/or OX40L and transduce the myeloid cell to express CD86 and 4-1BBL and/or OX40L proteins. In some embodiments, methods of expanding tumor infiltrating lymphocytes (TILs) with aAPCs and methods of treating cancers using TILs after expansion with aAPCs are also disclosed.

Provided herein are methods and compositions for enhancing an immune response and/or for the treatment of an immune-related condition in an individual, e.g., cancer, comprising killing, disabling, or depleting non-stimulatory myeloid cells using an antigen binding protein such as an antibody or antigen binding fragment thereof.

The present invention relates to a method for inducing and amplifying specific effectors, which comprises obtaining pulsed plasmacytoid dendritic cells (pDC) by incubation of a pDC line with at least one antigen, the pulsed pDC being subsequently irradiated and brought into contact with peripheral blood mononuclear cells (PBMC), and cultured or injected into an organism. The pulsed and irradiated pDC and the PBMC share at least one major histocompatibility complex (MHC) allele.

The present disclosure describes composition, methods, and systems associated with a genetically modified stem cell. The modified stem cell includes a reduced amount of Major Histocompatibility Complex II (MHC II) as compared to a corresponding wild-type cell. Further, the modified cell has decreased immunogenicity as compared to the corresponding wild-type cell.