Abstract: The present invention refers to immunosuppression-reverting oligonucleotides comprising 12 to 18 nucleotides, wherein at least one of the nucleotides is modified, and the oligonucleotide hybridizes with an hybridizing active region of the nucleic acid sequence of an ectoenzyme (CD73) of SEQ ID NO.1 (human) and/or SEQ ID NO.2 (human). The invention is further directed to a pharmaceutical composition comprising such oligonucleotide. The oligonucleotide and the pharmaceutical composition are used in a method of preventing and/or treating a disorder, where a CD73 imbalance is involved.

Abstract: The present invention refers to an oligonucleotide comprising 12 to 25 nucleotides, wherein at least one of the nucleotides comprises a modification selected from the group consisting of a bridged nucleic acid such as LNA, ENA, a 2?Fluoro modified nucleotide, a 2 O-Methyl modified nucleotide, a 2 O-Methoxy modified nucleotide, a FANA and a combination thereof. The oligonucleotide hybridizes with a nucleic acid sequence of Foxp3 of SEQ ID NO.1 and/or of SEQ ID NO.2 resulting in a reduction of the expression of FoxP3 mRNA, FoxP3 pre-mRNA or a combination thereof. The invention is further directed to a pharmaceutical composition comprising an oligonucleotide of the present invention and to the oligonucleotide and pharmaceutical composition, respectively for use in a method of preventing and/or treating a disorder, where FoxP3 imbalance is involved.