IL-2 conjugates and methods of use thereof
Disclosed herein are compositions, kits, and methods comprising interleukin (IL) conjugates (e.g., IL-2 conjugates) useful for the treatment of one or more indications. Also described herein are pharmaceutical compositions and kits comprising one or more of the interleukin conjugates (e.g., IL-2 conjugates).
1 . A method of making an IL-2 conjugate, comprising:
reacting an IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprising an unnatural amino acid having the structure:
wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 1, and the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 1 at Position X, wherein Position X is K35, F42, F44, K43, E62, P65, R38, T41, E68, Y45, V69, L72, or Y107 in reference to the amino acid positions within SEQ ID NO: 1, Position X−1 indicates the position of the first preceding amino acid residue, Position X+1 indicates the position of the first following amino acid residue, and the wavy lines indicate covalent bonds to the amino acid residues at Position X+1 and at Position X−1, respectively,
with an mPEG-DBCO of formula
wherein n is an integer such that the mPEG-DBCO comprises an mPEG having a molecular weight of about 5 kDa, about 10 kDa, about 15 kDa, about 20 kDa, about 25 kDa, about 30 kDa, about 35 kDa, about 40 kDa, about 45 kDa, or about 50 kDa,
to form an IL-2 conjugate.
2 . The method of claim 1 , wherein Position X is P65 in reference to the amino acid position within SEQ ID NO: 1.
3 . The method of claim 1 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an N-terminal deletion of one residue relative to SEQ ID NO: 1.
4 . The method of claim 3 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises the amino acid sequence of SEQ ID NO: 3 in which the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 3 at Position X, wherein Position X is K34, F41, F43, K42, E61, P64, R37, T40, E67, Y44, V68, L71, Y106 or in reference to the amino acid positions within SEQ ID NO: 3.
5 . The method of claim 1 , wherein n is an integer such that the mPEG-DBCO comprises an mPEG having a molecular weight of about 30 kDa.
6 . The method of claim 1 , wherein the mPEG-DBCO is of formula
7 . The method of claim 4 , wherein the IL-2 conjugate comprises the unnatural amino acid and the mPEG, wherein the unnatural amino acid covalently attached to the mPEG is collectively represented by the structure of is of Formula (XII) or (XIII):
wherein n is an integer such that the mPEG having the structure of —(OCH 2 CH 2 ) n —OCH 3 has a molecular weight of about 5 kDa, about 10 kDa, about 15 kDa, about 20 kDa, about 25 kDa, about 30 kDa, about 35 kDa, about 40 kDa, about 45 kDa, or about 50 kDa, and
the wavy lines indicate covalent bonds to the amino acid residues at Position X+1 and at Position X−1, respectively.
8 . The method of claim 7 , wherein Position X is P64 in reference to the amino acid position within SEQ ID NO: 3.
9 . The method of claim 1 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an amino acid sequence having about 95% sequence identity to SEQ ID NO: 1.
10 . The method of claim 9 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an amino acid sequence having about 97% sequence identity to SEQ ID NO: 1.
11 . The method of claim 8 , wherein n is an integer such that the mPEG having the structure of —(OCH 2 CH 2 ) n —OCH 3 has a molecular weight of about 30 kDa.
12 . A method of making an IL-2 conjugate, comprising:
reacting an IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprising an unnatural amino acid having the structure:
wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises the amino acid sequence of SEQ ID NO: 3 in which the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 3 at Position X, wherein Position X is P64 in reference to the amino acid position within SEQ ID NO: 3, Position X−1 indicates the position of the first preceding amino acid residue, Position X+1 indicates the position of the first following amino acid residue, and the wavy lines indicate covalent bonds to the amino acid residues at Position X+1 and at Position X−1, respectively, the following amino acid residue,
with an mPEG-DBCO having the structure:
wherein n is an integer such that the mPEG-DBCO comprises a PEG having a molecular weight of about 30 kDa,
to form an IL-2 conjugate comprising the unnatural amino acid and the mPEG, wherein the unnatural amino acid covalently attached to the mPEG is collectively represented by the structure of Formula (XII) or Formula (XIII):
wherein n is an integer such that the mPEG having the structure of —(OCH 2 CH 2 ) n— OCH 3 has a molecular weight of about 5 kDa, about 10 kDa, about 15 kDa, about 20 kDa, about 25 kDa, about 30 kDa, about 35 kDa, about 40 kDa, about 45 kDa, or about 50 kDa, and
the wavy lines indicate covalent bonds to the amino acid residues at Position X+1 and at Position X−1, respectively.
13 . The method of claim 1 , wherein Position X is K43 in reference to the amino acid position within SEQ ID NO: 1.
14 . The method of claim 1 , wherein Position X is Y107 in reference to the amino acid position within SEQ ID NO: 1.
15 . The method of claim 4 , wherein Position X is K42 in reference to the amino acid position within SEQ ID NO: 3.
16 . The method of claim 4 , wherein Position X is Y106 in reference to the amino acid position within SEQ ID NO: 3.
17 . A method of making an IL-2 conjugate, comprising:
reacting an IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprising an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 1 and an unnatural amino acid having the structure:
wherein the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 1 at Position X, wherein Position X is K35, F42, F44, K43, E62, P65, R38, T41, E68, Y45, V69, L72, or Y107 in reference to the amino acid positions within SEQ ID NO: 1, Position X-1 indicates the position of the first preceding amino acid residue, Position X+1 indicates the position of the first following amino acid residue, and the wavy lines indicate covalent bonds to the amino acid residues at Position X+1 and at Position X−1, respectively,
with a moiety comprising a dibenzocyclooctyne group and a PEG group having a molecular weight of about 5 kDa to about 50 kDa, thereby forming an IL-2 conjugate.
18 . The method of claim 17 , wherein the PEG group has a molecular weight of about 30 kDa.
19 . The method of claim 17 , wherein Position X is P65 in reference to the amino acid position within SEQ ID NO: 1.
20 . The method of claim 17 , wherein Position X is K43 or Y107 in reference to the amino acid position within SEQ ID NO: 1.
21 . The method of claim 17 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an amino acid sequence having about 95% sequence identity to SEQ ID NO: 1.
22 . The method of claim 17 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises the amino acid sequence of SEQ ID NO: 3in which the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 3 at Position X, wherein Position X is K34, F41, F43, K42, E61, P64, R37, T40, E67, Y44, V68, L71, or Y106 in reference to the amino acid positions within SEQ ID NO: 3.
23 . The method of claim 22 , wherein Position X is P64 in reference to the amino acid position within SEQ ID NO: 3.
24 . The method of claim 22 , wherein Position X is K42 or Y106 in reference to the amino acid position within SEQ ID NO: 3.
25 . A method of making an IL-2 conjugate, comprising:
reacting an IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprising an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 1 and an unnatural amino acid having an azido group,
wherein the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 1 at a position selected from K35, F42, F44, K43, E62, P65, R38, T41, E68, Y45, V69, L72, and Y107 in reference to the amino acid positions within SEQ ID NO: 1,
with a moiety comprising a dibenzocyclooctyne group and a PEG group, wherein the dibenzocyclooctyne group and the PEG group are collectively represented by the structure:
wherein n is an integer such that the PEG group having the structure of —(OCH 2 CH 2 ) n —OCH 3 has a molecular weight of about 5 kDa to about 50 kDa, thereby forming an IL-2 conjugate.
26 . The method of claim 25 , wherein n is an integer such that the PEG group having the structure of —(OCH 2 CH 2 ) n —OCH 3 has a molecular weight of about 30 kDa.
27 . The method of claim 25 , wherein Position X is P65 in reference to the amino acid position within SEQ ID NO: 1.
28 . The method of claim 25 , wherein Position X is K43 or Y107 in reference to the amino acid position within SEQ ID NO: 1.
29 . The method of claim 25 , wherein the dibenzocyclooctyne group and the PEG group are collectively represented by the structure:
30 . The method of claim 25 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises an amino acid sequence having about 95% sequence identity to SEQ ID NO: 1.
31 . The method of claim 25 , wherein the IL-2 polypeptide, or a pharmaceutically acceptable salt, solvate, or hydrate thereof, comprises the amino acid sequence of SEQ ID NO: 3 in which the unnatural amino acid substitutes for an amino acid residue within the amino acid sequence of SEQ ID NO: 3 at a position selected from K34, F41, F43, K42, E61, P64, R37, T40, E67, Y44, V68, L71, and Y106 in reference to the amino acid positions within SEQ ID NO: 3.
32 . The method of claim 31 , wherein Position X is P64 in reference to the amino acid position within SEQ ID NO: 3.
33 . The method of claim 31 , wherein Position X is K42 or Y106 in reference to the amino acid position within SEQ ID NO: 3.