The present disclosure relates to particular subsets of CD4+ and CD8+ T-cells, methods of isolating and generating these cells, compositions comprising these cells, and methods of treatment of a tumor or cancer by administering these cells alone or in combination with each other and/or additional therapies.

It is an object of the present invention to provide a method for efficiently producing a B cell population comprising B cells that recognize a specific antigen. According to the present invention, provided is a method for producing a B cell population, comprising: a step (c) of culturing a cell population comprising B cells together with a specific antigen in the absence of IL-21, in the absence of IL-4, and in the presence of a cytokine other than IL-21 and IL-4, while giving stimulation mediated by CD40 and a BAFF receptor to the cells; and a step (d) of culturing the cell population comprising B cells, while giving stimulation mediated by has to the cells, so as to obtain a B cell population comprising B cells that recognize the specific antigen.

The present disclosure provides regulatory T cells and regulatory T cell populations engineered to express a transcription factor. The present disclosure provides for treatment of immune disorders with regulatory T cells and regulatory T cell populations engineered to express a transcription factor.

The present disclosure relates to particular subsets of CD4+ and CD8+ T-cells, methods of isolating and generating these cells, compositions comprising these cells, and methods of treatment of a tumor or cancer by administering these cells alone or in combination with each other and/or additional therapies.

Dysfunctional or exhausted T cells arise in chronic diseases including chronic viral infections and cancer, and express high levels of co-inhibitory receptors. Therapeutic blockade of these receptors has clinical efficacy in the treatment of cancer. While co-inhibitory receptors are co-expressed, the triggers that induce them and the transcriptional regulators that drive their co-expression have not been identified. The immunoregulatory cytokine IL-27 induces a gene module in T cells that includes several known co-inhibitory receptors (Tim-3, Lag-3, and TIGIT). The present invention provides a novel immunoregulatory network as well as novel cell surface molecules that have an inhibitory function in the tumor microenvironment. The present invention further provides the novel discovery that the transcription factors Prdm1 and c-Maf cooperatively regulate the expression of the co-inhibitory receptor module. This critical molecular circuit underlies the co-expression of co-inhibitory receptors in dysfunctional T cells and identifies novel regulators of T cell dysfunction.

Provided are a composition for culturing NK cells, and a method of culturing NK cells using the same. According to an aspect, in culturing NK cells from peripheral blood mononuclear cells, when NK cells are cultured in a medium including the composition for culturing NK cells, the composition including IL-15, IL-18, and IL-27, the NK cells may proliferate in large quantities and activation of NK cells may be promoted. Therefore, when the NK cells are used, cancer cell apoptosis or cancer cell-killing ability may be promoted. Accordingly, the NK cells may be used as an effective adoptive immune cell therapy product in cancer prevention or treatment.

Provided herein are engineered Natural Killer (NK) cells deficient in expression of FcR? chain (g-NK cells), and further comprising a recombinant chimeric antigen receptor (CAR) and compositions thereof. Also provided herein are compositions containing the engineered NK cells and methods of making and using the engineered NK cells.

Factors for extending the ability of isolated pluripotent stem cells to generate extraembryonic lineages in vivo, following in vitro culture, herein, chemical extenders of pluripotency (CEP). Methods of extending the ability of a pluripotent cell to generate embryonic and extraembryonic lineages. The cell to be reprogrammed is contacted with effective amounts of the CEPs for a sufficient period of time to reprogram the cell into a chemically induced extended pluripotent cell (ciEPSC). ciEPSC are identified as an extended pluripotent cell based on properties including: (i) morphologically and (ii) functionally for example, based on their ability contribute to both TE and ICM, in vivo. The ciEPSCs can be cultured or induced to differentiate into cells of a desired type, and used in a number of applications, including but not limited to cell therapy and tissue engineering.

The present invention discloses a mesenchymal stem cell treated by at least two of cytokines IL4, IL21, and IL27, an exosome and use thereof. The present invention relates to the technical field of biomedicine. The treatment way is as follows: treating and stimulating a mesenchymal stem cell by stages with a complete medium containing the cytokine composition to obtain a capacitated mesenchymal stem cell; and then replacing with a basal medium for starvation treatment to obtain the capacitated exosome. The mesenchymal stem cell obtained after being pretreated with the cytokine composition and an exosome thereof provided in the present invention can exert a stronger immune modulating effect and thus, can be used for the treatment of immune diseases better.

The invention is directed to a method of preparing B-cells that produce interleukin-10 (IL-10), or IL-10 per se, which comprises contacting one or more B-cells ex vivo with an isolated interleukin-35 (IL-35) protein, and culturing the one or more B-cells under conditions to provide one or more B-cells that produce IL-10. The invention also is directed to a method of suppressing the proliferation of lymphocytes in vitro or in vivo by contacting lymphocytes with an isolated IL-35 protein. The invention further is directed to a method of suppressing autoimmunity in a mammal by administering to the mammal an IL-35 protein or IL-10-producing B-cells.