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Novel Melanocortin Receptor Templates, Peptides, and Use Thereof

a melanocortin receptor and template technology, applied in the field of new chimeric peptides and templates, can solve the problems of severe financial burden on the health care system in the united states, affecting the ability of people to interact socially with others, and wreak havoc on an individual's mental health

Inactive Publication Date: 2008-06-19
HASKELL LUEVANO CARRIE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, obesity can wreak havoc on an individual mental health and can affect a person's ability to interact socially with others.
Accompanying the devastating medical consequences of this problem is the severe financial burden placed on the health care system in the United States.
Because of the impact of obesity on individuals and society, much effort has been expended to find ways to treat obesity, but little success has been achieved in the long-term treatment and / or prevention of obesity.

Method used

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  • Novel Melanocortin Receptor Templates, Peptides, and Use Thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

Synthesis of Disulfide Crosslinked or Cyclized Peptides

[0068]As understood by the skilled artisan, disulfide cross-linked or cyclized peptides can be synthesized using standard Fmoc methodology as described in Carpino, L. A., and Han, G. Y., “The 9-Fluorenylmethyoxycarbonsy Amino-Protecting Group,”J. Org. Chem., 37:3404-3409 (1972); and Chang, C., and Meienhofer, J., “Solid-phase peptide synthesis using mild base cleavage of N alpha-fluorenylmethyloxycarbonylamino acids, exemplified by a synthesis of dihydrosomatostatin,”Int. J. Pept. Protein Res., 11:246-249 (1978). Standard Fmoc methodology can be performed on an automated or semi-automated synthesizer (Advance ChemTech 440MOS or LabTech, Louisville, Ky.). The amino acids Fmoc-Ser(tBu), Fmoc-Tyr(tBu), Fmoc-Nle, Fmoc-Glu(OtBu), Fmoc-H s(Trt), Fmoc-Arg(Pbf), Fmoc-DPhc, Fmoc-Trp(Boc), Fmoc-Gly, Fmoc-Lys(Boc), Fmoc-Pro, Fmoc-Val, and Fmoc-Phe are all commercially available. All reagents were ACS grade or better.

[0069]Peptides of the p...

example 2

Synthesis of Peptides Containing Cyclic Lactam Bridge

[0074]In accordance with the present invention, peptides containing cyclic lactam bridges can be prepared using standard Boc methodology as described in Merrifield, R. B., “Solid Phase Synthesis. II. The Synthesis of Bradykinin,”J. Am. Chem. Soc., 86:304-305 (1964); and Stewart, J. M., and Young, J. D., Solid Phase Peptide Synthesis 2nd ed., Pierce Chemical Co., Rockford, Ill. (1964) on an automated synthesizer (Advanced ChemTech 440MOS, Louisville, Ky.). The amino acids Boc-Tyr(2CIBzl), Boc-di-aminopropionic acid [Dpr(Fmoc)], Boc-Asp(OFm), Boc-Arg(Tos), Boc-Phe, Boc-His(Bom), Boc-DPhe, Boc-Trp(CHO), Boc-Asn, and Boc-Ala are commercially available. The peptides were assembled on commercially available pMBHA resin (0.28 meq / g substitution). All reagents were ACS grade or better.

[0075]The synthesis was performed using a commercially available 40 well Teflon reaction block with a course Teflon frit. Approximately 200 mg resin (0.08 m...

example 3

Assays

[0079]For cell culture and transfection, HEK-293 cells were maintained in Dulbecco's modified Eagle's medium (DMEM) with 10% fetal calf serum and seeded 1 day prior to transfection at 1 to 2×106 cell / 100-mm dish. Melanocortin receptor DNA in the pcDNA3 expression vector (20 μg) were transfected using the calcium phosphate method. Stable receptor populations were generated using G418 selection (1 mg / mL) for subsequent bioassay analysis.

Functional Bioassay

[0080]In the functional bioassay studies, HEK-293 cells stably expressing the mouse MC1, MC3, MC4 and MC5 receptors were transfected with 4 μg CRE / β-galactosidase reporter gene as previously described in Haskell-Luevano, C. et al., “Characterization of melanocortin NDP-MSH agonist peptide fragments at the mouse central and peripheral melanocortin receptors,”J. Med. Chem., 44:2247-2252 (2001); Haskell-Luevano, C. et al., “Structure activity studies of the melanocortin-4 receptor by in vitro mutagenesis: identification of agouti-...

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PUM

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Abstract

The present invention relates to novel chimeric peptides and templates containing a combination of antagonist and agonist endogenous ligand residues. In particular, the present invention relates to novel chimeric peptides and templates thereof based upon melanocortin agonist peptides and agouti related protein (AGRP). The present invention provides multifunctional chimeric peptides having specific bioactivity at melanocortin receptors and their use as drugs to treat various diseases and conditions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional application of co-pending application Ser. No. 11 / 491,596, filed Jul. 24, 2006; which is a continuation of co-pending application U.S. Ser. No. 10 / 602,394, filed Jun. 23, 2003, now U.S. Pat. No. 7,084,411, which are incorporated herein by reference in their entirety.GOVERNMENT SUPPORT[0002]This invention was made with government support under a grant awarded from the National Institutes of Health under grant numbers DK57080 and DK64250. The government has certain rights in the invention.FIELD OF THE INVENTION[0003]The present invention relates to novel chimeric peptides and templates containing a combination of antagonist and agonist endogenous ligand residues. In particular, the present invention relates to novel chimeric peptides and templates thereof based upon melanocortin agonist peptides and agouti related protein (AGRP) antagonist peptide, and their use as drugs to treat various diseases and conditi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07K7/00A61K38/00C07K14/47C07K14/68
CPCA61K38/04C07K14/68C07K14/47A61K38/12A61P3/04A61P43/00
Inventor HASKELL-LUEVANO, CARRIE
Owner HASKELL LUEVANO CARRIE
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