Polyamide compound and pharmaceutical composition for treating mitochondrial genetic disease

A polyamide compound binding to a target double-stranded DNA, wherein said target double-stranded DNA comprises at least one nucleotide pair selected from the group consisting of an A/T pair consisting of the first A of the following sense-stranded DNA and the corresponding T, an A/T pair consisting of the 8th A of the following sense-stranded DNA and the corresponding T, a G/C pair consisting of the 9th G of the following sense-stranded DNA and the corresponding C, a G/C pair consisting of the 14th G of the following sense-stranded DNA and the corresponding C, a T/A pair consisting of the 15th T of the following sense-stranded DNA and the corresponding A, an A/T pair consisting of the 16th A of the following sense-stranded DNA and the corresponding T, an A/T pair consisting of the 17th A of the following sense-stranded DNA and the corresponding T, a C/G pair consisting of the 19th C of the following sense-stranded DNA and the corresponding G, a G/C pair consisting of the 20th G of the following sense-stranded DNA and the corresponding C, a C/G pair consisting of the 21st C of the following sense-stranded DNA and the corresponding G, a T/A pair consisting of the 23rd T of the following sense-stranded DNA and the corresponding A, an A/T pair consisting of the 25th A of the following sense-stranded DNA and the corresponding T, in the double stranded DNA of the following formula(1):

• [Chem. 1]
• 5′-A T G G C A G A G C C C G G T A A T C G C A T
• A A-3′
• 3′-T A C C G T C T C G G G C C A T T A G C G T A
• T T-5′ (1)
• which consists of the sense-stranded DNA having a base sequence of 5′-ATGGCAGAGCCCGGTAATCGCATAA-3′ (SEQ ID NO:
• 1) and the antisense-stranded DNA having a base sequence of 5′-TTATGCGATTACCGGGCTCTGCCAT-3′ (SEQ ID NO:
• 2);
• and at least one end of said target double-stranded DNA is an A/T or T/A pair;
• (1) a residue of the polyamide compound, corresponding to the A/T pair or T/A pair at one end thereof is a turn structure selected from the group consisting of γ-aminobutyric acid residue, (R)2,4-diaminobutyric acid residue, and 5-aminovaleric acid residue, wherein the hydrogen atom of the residues may be substituted with an alkyl group having 1 to 4 carbon atoms, an amino group, a hydroxyl group, a carboxyl group, or —NH3;
• (2) the binding region of the polyamide compound, corresponding to the target double-stranded DNA except for the A/T pair or T/A pair at one end thereof, is composed of
• (a) Im/Py, or Im/β, corresponding to the G/C pair of the target double-stranded DNA,
• (b) Py/Im, or β/Im, corresponding to the C/G pair of the target double-stranded DNA,
• (c) Py/Py, Py/Hp, Py/β, β/Py, or β/β corresponding to the A/T pair of the target double-stranded DNA, and
• (d) Py/Py, Hp/Py, Py/β, β/Py, or β/β, corresponding to the T/A pair of the target double-stranded DNA,
• (wherein Im is N-methylimidazole, Py is N-methylpyrrole, Hp is 3-hydroxy-N-methylpyrrole, and β is β-alanine;
• and Im/β corresponding to the G/C pair and β/Im corresponding to the C/G pair can be only used in the case of a successive Im•β/Im•β corresponding to a successive G•C/G•C pair or a successive β•Im/β•Im corresponding to a successive C•G/C•G pair;
• and the hydrogen atom of the Im residue, Py residue, Hp residue, or β residue may be substituted to an alkyl group having 1 to 4 carbon atoms, an amino group, a hydroxyl group, a carboxyl group, or —NH3), and the binding region comprises at least one residue pair of Im/β corresponding to the G/C pair, β/Im corresponding to the C/G pair, β/β corresponding to the A/T pair, or β/β, corresponding to the T/A pair, of the target double-stranded DNA;
• (3) an end of the polyamide compound corresponding to the 5′ end of the other end of the target double-stranded DNA is an amino group of Im residue, an amino group of Py residue, an amino group of Hp residue, an amino group of β-alanine, a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group, a carboxyl group, or an acyl group having 1 to 4 carbon atoms;
• an end of the polyamide compound corresponding to the 3′ end of the other end of the target double-stranded DNA is a carboxyl group of Im residue, a carboxyl group of Py residue, a carboxyl group of Hp residue, a carboxyl group of β-alanine, an N,N-dimethylaminopropyl residue, or a β-alanine-N,N-dimethylaminopropyl residue.