Modified PYY (3-36) peptides and their effects on feeding behavior
The present invention relates to compounds of formula (I); variants or derivatives thereof, or salts or solvates thereof. The present invention also relates to the use of such compounds to control appetite, feeding, food intake, energy expenditure and calorie intake, particularly in the treatment of obesity.
1. A compound of formula (I):
a variant or derivative thereof;
wherein the variant has 1, 2, 3 or 4 modifications selected from deletions, insertions, inversions, repeats and substitutions in the PYY 4-36 portion of formula (I);
and wherein the derivative is the compound of formula (I) or the variant that is modified by one or more processes selected from amidation, glycosylation, carbamylation, acylation, sulfation, phosphorylation, cyclization, lipidization and pegylation and fusion to another peptide or protein to form a fusion protein;
or a salt or solvate thereof.
2. A compound as claimed in claim 1 wherein the PYY 4-36 is human PYY 4-36 .
3. A compound as claimed in claim 1 in which the PYY 4-36 includes at least 30 amino acids of the native PYY 4-36 sequence.
4. A compound as claimed in claim 1 which is a derivative that is a fusion protein.
5. A compound as claimed in claim 4 that is produced by a recombinant method.
6. A compound as claimed in claim 4 that is produced by a synthetic method.
7. A pharmaceutical composition comprising a compound as claimed in claim 1 .
8. A method of treating obesity or diabetes in a subject in need thereof comprising administering to the subject a compound of claim 1 .
9. A method of reducing appetite in a subject, reducing food intake in a subject, or reducing calorie intake in a subject, comprising administering to the subject a compound of claim 1 .
10. The method of claim 8 , wherein the subject is overweight.
11. The method of claim 8 , wherein the subject is obese.
12. The method of claim 8 , wherein the subject is diabetic.
13. The method of claim 8 , wherein the compound is administered peripherally.
14. The method of claim 8 wherein the compound is administered subcutaneously, intravenously, intramuscularly, intranasally, transdermally or sublingually.
15. A compound as claimed in claim 1 wherein the compound is a variant, and wherein the variant has 1, 2, 3 or 4 modifications selected from deletions, insertions, inversions, repeats and substitutions in the PYY 4-36 portion of formula (I).
16. A compound as claimed in claim 1 , wherein the compound is a derivative, and wherein the derivative is the compound of formula (I) that is modified by one or more processes selected from amidation, glycosylation, carbamylation, acylation, sulfation, phosphorylation, cyclization, lipidization and pegylation and fusion to another peptide or protein to form a fusion protein.