Composition comprising at least to compounds which induces indolamine 2,3 - dioxygenase (IDO), for the treatment of an autoimmune disorder or suffering from immune rejection of organs
a technology of dioxygenase and indolamine, which is applied in the field of compound comprising at least two compounds, can solve problems such as inconvenient us
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example 1
Synergistic Effect on IDO Expression by Zebularine and Interferon Gamma
Materials and Methods
[0063]THP-1 (ATCC: TIB-202) is a human monocytic cell line that originates from an acute monocytic leukemia. It has the phenotype of monocytes but can be differentiated to a more dendritic phenotype. In the current study, the THP-1 cells were in vitro passaged in RPMI 1640 medium supplemented with 5% or 10% FCS, 10 mM Hepes, 1 mM Sodium pyruvate, and 50 ug / ml gentamicin (R5 or R10 medium respectively). The cell density was adjusted to 200 000 cells per ml, and the cultures were incubated for four to seven days at 37° C. with 10% CO2 in a humidified incubator. The substance, or combination of substances, being studied, were added to the medium at specified time points and in the case of IFN-gamma removed from medium as indicated. 96-168 hours after initiation of treatment, the IDO expression was assessed by PCR or by Quantitative PCR (Roche). RNA was extracted from cells cultured in flasks or ...
example 2
Synergistic Effect on IDO Expression by Interferon Gamma and Valproic Acid
[0068]Materials and methods used were the same as described in Example 1 above. Cells of the human monocytic cell line THP-1 were non-exposed (medium control), exposed to interferon gamma alone (200 IU / ml), valproic acid (Sigma) alone (1 mM) or to the combination (FIG. 2A). The results of THP-1 cells exposed to the combination demonstrate a synergistic effect. Similar experiments but with the valproic acid concentration reduced to 0.5 mM was also performed (FIG. 2B). A synergistic effect on IDO1 expression was demonstrated also with this combination.
example 3
Synergistic Effect on IDO Expression by Zebularine, Interferon Gamma and Valproic Acid
[0069]Materials and methods used were the same as described in Example 1 above. Cells of the human monocytic cell line THP-1 were non-exposed (medium control), exposed to zebularine alone (100 uM), to interferon gamma alone (200 IU / ml) or valproic acid alone (1 mM) (FIG. 3). The THP-1 cells were exposed to the three substances pairwise and also with all three substances in combination. The scale is logaritmic and the relative values are given for each bar. The result clearly demonstrates a synergistic effect of all the three substances on the IDO1 expression in THP-1 cells.
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