Abstract: The present invention provides a method for the treatment of immune mediated or immune related diseases or disorders, infectious diseases, metabolic disorders and cancer in mammalian subjects. This method comprises the administration of a naturally occurring, mammalian intermediary metabolite or T cell receptor ligand, preferably a glucosylceramide, to a mammalian subject. In a preferred embodiment, such mammalian subjects are human beings.

Abstract: The present invention provides a method for the treatment of immune mediated or immune related diseases or disorders, infectious diseases, metabolic disorders and cancer in mammalian subjects. This method comprises the administration of a naturally occurring, mammalian intermediary metabolite or T cell receptor ligand, preferably a glucosylceramide, to a mammalian subject. In a preferred embodiment, such mammalian subjects are human beings.

Abstract: The present invention relates to a method for the treatment of immune-related disorders in a mammalian subject in need of such treatment. This method comprises the step of manipulating the NK T cell population in said subject by suitable means, said manipulation of the NK T cell population resulting in modulation of the Th1/Th2 balance toward anti-inflammatory cytokine producing cells. Manipulation of the NK T cell population may be performed either by depletion of said cells by a suitable means or alternatively by ex vivo education of the NK T cells, such that the educated NK T cells have the capability to modulate the Th1/Th2 balance toward anti-inflammatory cytokine producing cells.