Abstract: A method of ex-vivo expanding a population of stem cells, while at the same time inhibiting differentiation of the stem cells.

Abstract: Ex vivo and in vivo methods of expansion of renewable stem cells, expanded populations of renewable stem cells and their uses.

Abstract: Ex vivo and in vivo methods of expanding a population of stem and/or progenitor cells, while at the same time reversibly inhibiting differentiation of the stem and/or progenitor cells by providing the stem and/or progenitor cells with an effective amount of at least one copper chelate, so as to maintain a free copper concentration available to said cells substantially unchanged, to thereby expand the population of said stem and/or progenitor cells, while at the same time reversibly inhibit differentiation of said stem and/or progenitor cells.

Abstract: The present invention is directed to a substantially pure protein that has cytostatic but not cytotoxic activity. The invention also provides a continuous cell line that produces the protein, and methods for its purification. The invention is also directed towards the use of the inhibitory protein, both in vitro and in vivo, in reducing the proliferation of bone marrow cells and leukocytes, modulating inflammation, as well as in immunosuppression and the treatment of cancer.

Abstract: A cell population cultured ex-vivo in a culture medium under conditions permitting cells of the cell population to proliferate and, at the same time, reducing a capacity of the cells in utilizing cooper, the cells are hence expanded yet not further differentiated as compared to ex-vivo seeded cells from which the cell population developed.

Abstract: A method of expanding a population of cells, while at the same time inhibiting differentiation of the cells, the method includes the step of providing the cells with conditions for cell proliferation and, at the same time, for reducing a capacity of the cells in utilizing copper. The method can be executed both in-vivo and ex-vivo. A method of inducing differentiation in a population of cells, the method includes the step of providing the cells with a transition metal chelator which binds copper and which is effective in inducing cell differentiation.