CA IX-NIR dyes and their uses
The present disclosure relates to compounds that are useful as near-infrared fluorescence probes, wherein the compounds include i) a ligand that binds to the active site of carbonic anhydrase, ii) a dye molecule, and iii) a linker molecule that comprises an amino acid, amide, ureido, or polyethylene glycol derivative thereof. The disclosure further describes methods and compositions for making and using the compounds, methods incorporating the compounds, and kits incorporating the compounds.
1. A method of imaging cancer or inflammatory diseases, the method comprising contracting tissue with a compound, or salt thereof, the compound having the formula:
B-W-X-Y-Z
wherein B is a CA IX-targeted molecule is selected from the group consisting of
wherein n is 0, 1, 2, or 3; m is 0, 1, 2, 3, 4, or 5, and p is 0, 1, 2, or 3;
W comprises an extended hydrophobic residue;
X comprises a hydrophobic spacer;
Y comprises an amino acid spacer; and
Z comprises a NIR dye,
illuminating the tissue with an excitation light of a wavelength absorbed by the compound; and
detecting the optical signal emitted by the compound in the tissue.
2. The method of claim 1 , wherein W is a hydrophobic amino acid, aromatic amino acid or derivative thereof.
3. The method of claim 1 , wherein W is selected from the group consisting of: alanine, leucine, isoleucine, valine, proline, phenylalanine, tryptophan, methionine, tyrosine, arginine, histidine, lysine, glycine, serine, threonine, cysteine, tyrosine, asparagine, aspartic acid, glutamic acid, and glutamine and derivatives thereof.
4. The method of claim 1 , wherein X is a length from 7 atoms to 14 atoms.
5. The method of claim 1 , wherein X is selected from the group consisting of eight aminooctonoic acid (EAOA), polyethylene glycol (PEG), polyethylene amine (PEA), N-amino-dPEG 2 acid, a chain of 6 atoms, a spacer 6 atoms in length, a chain from 6 to 20 atoms in length, and a peptide comprising aryl or aryl alkyl groups, each of which is optionally substituted, and wherein one aryl or aryl alkyl group is about 6 to about 10, or about 6 to about 14 atoms, and the other aryl or aryl alkyl group is about 10 to about 14, or about 10 to about 15 atoms, or about 1 to about 20 atoms.
6. The method of claim 1 , wherein X, Y, and Z, are independently selected from the group consisting of a variable charge, negative charge, and positive charge.
7. The method of claim 1 , wherein X is a peptide compromising positively charged amino acids or quaternary amine containing amino acid.
8. The method of claim 1 , wherein Y is selected from the group consisting of an aromatic amino acid, an amino acid spacer with a chalcogen-containing side chain group, an amino acid spacer with a sulfur-containing side chain group, an amino acid spacer with a sulfur-containing thiophenol moiety, a tyrosine with a carbon isotope on the aromatic ring of tyrosine, a an amino acid with an aromatic ring with a hydrogen isotope aspartic acid, glutamic acid, arginine, histidine, lysine, glycine, serine, threonine, cysteine, tyrosine, asparagine, aspartic acid, glutamic acid, glutamine, alanine, leucine, isoleucine, valine, proline, phenylalanine, tryptophan, methionine, and derivatives thereof.
9. The method of claim 1 , wherein the near-infrared dye is selected from the group consisting of, IR800, SP054, S0121, S2076, S0456,
wherein R41, R42, R43, R44, R45, R46, R47, R48, ═H or SO 3 H; X=O, S, or NH.
10. The method of claim 1 , wherein B is
wherein n is 0, m is 5 and p is 2;
W is PEG or PEA;
X is PEG or PEA;
Y is selected from the group consisting of tyrosine, phenylalanine-tyrosine, phenylalanine-arginine-tyrosine, and histidine-tyrosine;
and Z comprises S0456.
11. The method of claim 1 , wherein the compound has an absorption and emission maxima between about 500 nm and about 900 nm.
12. The method of claim 1 , wherein the tissue is biological tissue.
13. The method of claim 1 , wherein the compound may be formulated in a pharmaceutically or therapeutically acceptable composition.
14. The method of claim 1 , wherein the signal emitted by the compound is used to construct an image.
15. The method of claim 1 , wherein the tissue is in a subject and the subject is an animal or human.
16. The method of claim 1 , wherein the method further comprises contacting the biological tissue with at least one additional fluorescent compound.
17. The method of claim 16 , wherein the at least one additional fluorescent compound comprises a pteroyl ligand conjugated to an amino acid linking group or a PSMA-targeting compound conjugated to an amino acid linking group.
18. The method of claim 1 , wherein the compound has a formula selected from the group consisting of
19. A composition comprising a compound selected from the group consisting of:
and at least one additional fluorescent compound.
20. The composition of claim 19 , wherein the at least one additional fluorescent compound comprises a pteroyl ligand conjugated to an amino acid linking group or a PSMA-targeting compound conjugated to an amino acid linking group.