Uses of kappa-conotoxin PVIIA
AssigneeCognetix, Inc.
InventorsAnn Cornell-Bell, Karen Pemberton, Davis Temple, Richard Layer, R. McCabe, Robert Jones
Life of this patent
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Abstract
The invention relates to uses of kappa-conotoxin PVIIA (κ-PVIIA), analogs and derivatives for activating ATP-sensitive K+ channels. The activation of ATP-sensitive K+ channels is useful for opening KATP channels which can be used to treat a wide range of disease and injury states, including cerebral and cardiac ischemia and asthma.
Claims21
A method for treating disorders associated with radical depolarization of excitable membranes by activating a KATP channel which comprises administering to an individual in need thereof an effective amount of an active agent selected from the group consisting of:
- (a) a compound of the following formula
- Cys-Xaa1-Ile-Xaa2-Asn-Gln-Xaa3-Cys-Xaa4-Gln-Xaa5-Leu-Asp-Asp-Cys-Cys-Ser-Xaa1-Xaa3-Cys-Asn-Xaa1-Xaa4-Asn-Xaa3-Cys-Val (SEQ ID NO:1), wherein Xaa1 and Xaa3 are independently Arg, homoarginine, ornithine, Lys, N-methyl-Lys, N,N-dimethyl-Lys, N,N,N-trimethyl-Lys, any synthetic basic amino acid, His or halo-His;
- Xaa2 is Pro or hydroxy-Pro (Hyp);
- Xaa4 is Phe, Tyr, meta-Tyr, ortho-Tyr, nor-Tyr, mono-halo-Tyr, di-halo-Tyr, O-sulpho-Tyr, O-phospho-Tyr, nitro-Tyr, Trp (D or L), neo-Trp, halo-Trp (D or L) or any synthetic aromatic amino acid;
- and Xaa5 is His or halo-His,
- (b) an analog of the compound of (a), said analog selected from the group consisting of:
- (SEQ ID NO:2)
- κ-PVIIA[R18A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Ala-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:3)
- κ-PVIIA[R22A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Ala-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:4)
- κ-PVIIA[I3A]:
- Cys-Arg-Ala-Hyp-Asn-Gln-Lys-Cys-Phe-GIn-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:5)
- κ-PVIIA[κ19A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Ala-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:6)
- κ-PVIIA[R2A]:
- Cys-Ala-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:7)
- κ-PVIIA[F9A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Ala-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:8)
- κ-PVIIA[κ25A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Ala-Cys-Val;
- (SEQ ID NO:9)
- κ-PVIIA[R2κ]:
- Cys-Lys-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:10)
- κ-PVIIA[κ7A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Ala-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:11)
- κ-PVIIA[F9M]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Met-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:12)
- κ-PVIIA[F9Y]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Tyr-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:13)
- κ-PVIIA[R2Q]:
- Cys-Gln-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:14)
- κ-PVIIA[H11A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-Ala-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:15)
- κ-PVIIA[D14A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Ala-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:16)
- κ-PVIIA[Q6A]:
- Cys-Arg-Ile-Hyp-Asn-Ala-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:17)
- κ-PVIIA[N21A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Ala-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:18)
- κ-PVIIA[S17A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ala-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:19)
- κ-PVIIA[N24A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Ala-Lys-Cys-Val;
- (SEQ ID NO:20)
- κ-PVIIA[L12A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Ala-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:21)
- κ-PVIIA[D1A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Ala-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:22)
- κ-PVIIA[Q10A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Ala-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:23)
- κ-PVIIA[V27A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Ala;
- (SEQ ID NO:24)
- κ-PVIIA[O4A]:
- Cys-Arg-Ile-Ala-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- and
- (SEQ ID NO:25)
- κ-PVIIA[N5A]:
- Cys-Arg-Ile-Hyp-Ala-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (c) a derivative of (a) or (b);
- and
- (d) a physiologically acceptable salt thereof.
A method for treating cardiac ischemia which comprises administering to an individual in need thereof an effective amount of an active agent selected from the group consisting of:
- (a) a compound of the following formula
- Cys-Xaa1-Ile-Xaa2-Asn-Gln-Xaa3-Cys-Xaa4-Gln-Xaa5-Leu-Asp-Asp-Cys-Cys-Ser-Xaa1-Xaa3-Cys-Asn-Xaa1-Xaa4-Asn-Xaa3-Cys-Val (SEQ ID NO:1), wherein Xaa1 and Xaa3 are independently Arg, homoarginine, ornithine, Lys, N-methyl-Lys, N,N-dimethyl-Lys, N,N,N-trimethyl-Lys, any synthetic basic amino acid, His or halo-His;
- Xaa2 is Pro or hydroxy-Pro (Hyp);
- Xaa4 is Phe, Tyr, meta-Tyr, ortho-Tyr, nor-Tyr, mono-halo-Tyr, di-halo-Tyr, O-sulpho-Tyr, O-phospho-Tyr, nitro-Tyr, Trp (D or L), neo-Trp, halo-Trp (D or L) or any synthetic aromatic amino acid;
- and Xaa5 is His or halo-His,
- (b) an analog of the compound of (a), said analog selected from the group consisting of:
- (SEQ ID NO:2)
- κ-PVIIA[R18A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Ala-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:3)
- κ-PVIIA[R22A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Ala-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:4)
- κ-PVIIA[I3A]:
- Cys-Arg-Ala-Hyp-Asn-Gln-Lys-Cys-Phe-GIn-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:5)
- κ-PVIIA[κ19A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Ala-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:6)
- κ-PVIIA[R2A]:
- Cys-Ala-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:7)
- κ-PVIIA[F9A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Ala-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:8)
- κ-PVIIA[κ25A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Ala-Cys-Val;
- (SEQ ID NO:9)
- κ-PVIIA[R2κ]:
- Cys-Lys-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:10)
- κ-PVIIA[κ7A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Ala-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:11)
- κ-PVIIA[F9M]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Met-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:12)
- κ-PVIIA[F9Y]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Tyr-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:13)
- κ-PVIIA[R2Q]:
- Cys-Gln-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:14)
- κ-PVIIA[H11A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-Ala-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:15)
- κ-PVIIA[D14A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Ala-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:16)
- κ-PVIIA[Q6A]:
- Cys-Arg-Ile-Hyp-Asn-Ala-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:17)
- κ-PVIIA[N21A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Ala-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:18)
- κ-PVIIA[S17A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ala-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:19)
- κ-PVIIA[N24A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Ala-Lys-Cys-Val;
- (SEQ ID NO:20)
- κ-PVIIA[L12A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Ala-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:21)
- κ-PVIIA[D1A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Ala-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:22)
- κ-PVIIA[Q10A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Ala-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (SEQ ID NO:23)
- κ-PVIIA[V27A]:
- Cys-Arg-Ile-Hyp-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Ala;
- (SEQ ID NO:24)
- κ-PVIIA[O4A]:
- Cys-Arg-Ile-Ala-Asn-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- and
- (SEQ ID NO:25)
- κ-PVIIA[N5A]:
- Cys-Arg-Ile-Hyp-Ala-Gln-Lys-Cys-Phe-Gln-His-Leu-Asp-Asp-Cys-
- Cys-Ser-Arg-Lys-Cys-Asn-Arg-Phe-Asn-Lys-Cys-Val;
- (c) a derivative of (a) or (b);
- and
- (d) a physiologically acceptable salt thereof.
Dependencies are inferred from the claim text.