Abstract: The current invention relates to a chimeric polypeptide, a nucleic acid encoding such chimeric polypeptide, a cell comprising such chimeric polypeptide of nucleic acid, preferably a T cell, a CAR T cell, NK cell or a CAR NK cell, and method of treatment using such cell, polypeptide of nucleic acid in the treatment of cancer, in particular in immune cell therapy. The chimeric polypeptide according to the invention allows for the reversible and dose dependent control of T cell and NK cell function (cytokine release, cytotoxicity).

Abstract: The present invention provides methods for antigen and/or bioactive molecule delivery to antigen presenting cells utilizing ASC specks as vehicles; 1) the ASC speck composition is made of ASC protein(s) and the antigen and/or bioactive molecule(s) purified from cells as a compact micro-spherical structure; 2) purified micro-spherical ASC speck delivery vehicles are stable at 37° C. for more than 30 days; and 3) antigen and/or bioactive molecules carried by ASC specks can be efficiently phagocytosed by antigen presenting cells and their degradation in the lysosome allows antigen processing and presentation.

Abstract: The present invention relates to a novel method for an antigen and/or bioactive molecule delivery and a composition that functions in the antigen and/or bioactive molecule delivery comprising the ASC speck carrier and the antigen and/or bioactive molecule, carried by the ASC speck carrier.