WO2008101017A2 - Glucagon/glp-1 receptor co-agonists - Google Patents

Glucagon/glp-1 receptor co-agonists Download PDF

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Publication number
WO2008101017A2
WO2008101017A2 PCT/US2008/053857 US2008053857W WO2008101017A2 WO 2008101017 A2 WO2008101017 A2 WO 2008101017A2 US 2008053857 W US2008053857 W US 2008053857W WO 2008101017 A2 WO2008101017 A2 WO 2008101017A2
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Prior art keywords
seq
glucagon
peptide
glucagon peptide
amino acid
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French (fr)
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WO2008101017A3 (en
Inventor
Jonathan Day
James Patterson
Joseph Chabenne
Maria Dimarchi
David Smiley
Richard D. Dimarchi
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INDIANA UNVERSITY RESEARCH AND TECHNOLOGY Corp
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INDIANA UNVERSITY RESEARCH AND TECHNOLOGY Corp
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Priority to EP20080729769 priority Critical patent/EP2111414B1/en
Priority to BRPI0807728-2A priority patent/BRPI0807728A2/pt
Priority to MX2009008241A priority patent/MX2009008241A/es
Priority to KR1020157026403A priority patent/KR20150116465A/ko
Priority to US12/527,140 priority patent/US8454971B2/en
Priority to EA200901108A priority patent/EA017849B1/ru
Priority to JP2009549703A priority patent/JP6017754B2/ja
Priority to NZ578948A priority patent/NZ578948A/en
Priority to CA 2677932 priority patent/CA2677932A1/en
Priority to CN200880012086.2A priority patent/CN101790538B/zh
Priority to UAA200909473A priority patent/UA104842C2/uk
Application filed by INDIANA UNVERSITY RESEARCH AND TECHNOLOGY Corp filed Critical INDIANA UNVERSITY RESEARCH AND TECHNOLOGY Corp
Priority to HK10102425.9A priority patent/HK1135993B/en
Priority to AU2008216265A priority patent/AU2008216265B2/en
Publication of WO2008101017A2 publication Critical patent/WO2008101017A2/en
Publication of WO2008101017A3 publication Critical patent/WO2008101017A3/en
Priority to TNP2009000313A priority patent/TN2009000313A1/fr
Priority to ZA2009/05521A priority patent/ZA200905521B/en
Priority to IL200396A priority patent/IL200396A/en
Anticipated expiration legal-status Critical
Priority to MA32206A priority patent/MA31242B1/fr
Priority to ECSP099622 priority patent/ECSP099622A/es
Priority to US13/737,232 priority patent/US8900593B2/en
Priority to US14/535,853 priority patent/US9447162B2/en
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/575—Hormones
    • C07K14/605—Glucagons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • A61K38/22—Hormones
    • A61K38/26—Glucagons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
    • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
    • A61K47/56—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
    • A61K47/59—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes
    • A61K47/60—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P21/00—Drugs for disorders of the muscular or neuromuscular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/04—Anorexiants; Antiobesity agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/06—Antihyperlipidemics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/12—Antihypertensives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide
    • C07K2319/30—Non-immunoglobulin-derived peptide or protein having an immunoglobulin constant or Fc region, or a fragment thereof, attached thereto

Definitions

  • Pre-proglucagon is a 158 amino acid precursor polypeptide that is processed in different tissues to form a number of different proglucagon-derived peptides, including glucagon, glucagon-like peptide-1 (GLP-I), glucagon-like peptide-2 (GLP- 2) and oxyntomodulin (OXM), that are involved in a wide variety of physiological functions, including glucose homeostasis, insulin secretion, gastric emptying, and intestinal growth, as well as the regulation of food intake.
  • GLP-I glucagon-like peptide-1
  • GLP- 2 glucagon-like peptide-2
  • OXM oxyntomodulin
  • Glucagon is a 29-amino acid peptide that corresponds to amino acids 33 through 61 of pre-proglucagon, while GLP-I is produced as a 37-amino acid peptide that corresponds to amino acids 72 through 108 of pre-proglucagon.
  • GLP-l(7-36) amide or GLP-l(7-37)acid are biologically potent forms of GLP-I, that demonstrate essentially equivalent activity at the GLP-I receptor. Hypoglycemia occurs when blood glucose levels drops too low to provide enough energy for the body's activities. In adults or children older than 10 years, hypoglycemia is uncommon except as a side effect of diabetes treatment, but it can result from other medications or diseases, hormone or enzyme deficiencies, or tumors.
  • glucagon a hormone produced by the pancreas, signals the liver to break down glycogen and release glucose, causing blood glucose levels to rise toward a normal level.
  • glucagon's general role in glucose regulation is to counteract the action of insulin and maintain blood glucose levels.
  • this glucagon response to hypoglycemia may be impaired, making it " harder for glucose levels to return to the ⁇ normal range.
  • Hypoglycemia is a life threatening event that requires immediate medical attention.
  • the ' admi ⁇ istration of glucagon is an established medication for treating acute hypoglycemia and it can restore. normal levels pf glucose within minutes of administration.
  • glucagon When glucagon is used in the acute medical treatment of hypoglycemia, a crystalline form of glucagon is solubilized with a dilute acid buffer and the solution is injected intramuscularly. While this treatment is effective, the methodology is cumbersome and dangerous for someone that is semi-conscious. Accordingly, there is a need for a glucagon analog that maintains or exceeds the biological performance of the parent molecule but is sufficiently soluble and stable, under relevant physiological conditions, that it can be pre-formulated as a solution, ready for injection.
  • diabetics are encouraged to maintain near normal blood glucose levels to delay or prevent microvascular complications. Achievement of this goal usually requires intensive insulin therapy. In striving to achieve this goal, physicians have encountered a substantial increase in the frequency and severity of hypoglycemia in their diabetic patients. Accordingly, improved pharmaceuticals and methodologies are needed for treating diabetes that are less likely to induce hypoglycemia than current insulin therapies.
  • GLP-I has different biological activities compared to glucagon. Its actions include stimulation of insulin synthesis and secretion, inhibition of glucagon secretion, and inhibition of food intake. GLP-I has been shown to reduce hyperglycemia (elevated glucose levels) in diabetics. Exendin-4, a peptide from lizard venom that shares about 50% amino acid identity with GLP-I, activates the GLP-I receptor and likewise has been shown to reduce hyperglycemia in diabetics.
  • hyperglycemia elevated glucose levels
  • Exendin-4 a peptide from lizard venom that shares about 50% amino acid identity with GLP-I, activates the GLP-I receptor and likewise has been shown to reduce hyperglycemia in diabetics.
  • GLP-I and exendin-4 may reduce food intake and promote weight loss, an effect that would be beneficial not only for diabetics but also for patients suffering from obesity.
  • Patients with obesity have a higher risk of diabetes, hypertension, hyperlipidemia, cardiovascular disease, and musculoskeletal diseases.
  • high potency glucagon agonists analogs are provided that also exhibit increased activity at the glucagon receptor, and in further embodiments exhibit enhanced biophysical stability and/or aqueous solubility.
  • high potency glucagon agonists analogs are provided that also exhibit increased activity at the glucagon receptor, and in further embodiments exhibit enhanced biophysical stability and/or aqueous solubility.
  • glucagon agonist analogs are provided that have lost native glucagon's selectivity for the glucagon receptor verses the GLP-I receptor, and thus represent co-agonists of those two receptors. Selected amino acid modifications within the glucagon analogs can control the relative activity of the analog at the GLP-I receptor verses the glucagon receptor.
  • yet another aspect of the invention provides glucagon co-agonist analogs that have higher activity at the glucagon receptor versus the GLP-I receptor, glucagon co-agonist analogs that have approximately equivalent activity at both receptors, and glucagon co-agonist analogs that have higher activity at the GLP-I receptor versus the glucagon receptor.
  • the latter category of co-agonist can be engineered to exhibit little or no activity at the glucagon receptor, and yet retain ability to activate the GLP-I receptor with the same or better potency than native GLP-I. Any of these analogs may also include modifications that confer enhanced biophysical stability and/or aqueous solubility.
  • Glucagon analogs that demonstrate co-agonism at the glucagon and GLP-I receptors are advantageous for several applications. First of all the use of glucagon to treat hypoglycemia may overcompensate for low blood glucose levels and result in excess blood glucose levels.
  • glucagon co-agonist analogs of the invention may be used to control hyperglycemia, or to induce weight loss or prevent weight gain, when administered alone or in combination with other anti-diabetic or anti- obesity treatments.
  • Another compound that induces weight loss is oxyntomodulin, a naturally occurring digestive hormone found in the small intestine (see Diabetes 2005; 54:2390-2395).
  • Oxyntomodulin is a 37 amino acid peptide that contains the 29 amino acid sequence of glucagon (i.e.
  • SEQ ID NO: 1 followed by an 8 amino acid carboxy terminal extension of SEQ ID NO: 27 (KRNRNNIA). While the present invention contemplates that glucagon analogs described herein may optionally be joined to this 8 amino acid carboxy terminal extension (SEQ ID NO: 27), the invention in some embodiments also specifically contemplates analogs and uses of analogs lacking the 8 contiguous carboxy amino acids of SEQ ID NO: 27.
  • the compounds can be customized by amino acid modifications to regulate the GLP-I activity of the peptide, and thus the glucagon analogs of the present can be tailored to treat a particular condition or disease. More particularly, glucagon analogs are provided herein wherein each analog displays a characteristic relative level of activity at the respective glucagon and GLP-I receptors.
  • each peptide to produce a glucagon peptide having anywhere from at least about 10% (including at least about 20%, 30%, 40%, 50%, 60%, 75%, 100%, 125%, 150%, 175%) to about 200% or higher activity at the GLP-I receptor relative to native GLP-I and anywhere from at least about 10% (including about 20%, 30%, 40%, 50%, 60%, 75%, 100%, 125%, 150%, 175%, 200%, 250%, 300%, 350%, 400%, 450%) to about 500% or higher activity at the glucagon receptor relative to native glucagon.
  • the amino acid sequence of native glucagon is SEQ ED NO: 1
  • the amino acid sequence of GLP-l(7-36)amide is SEQ ID NO: 52
  • the amino acid sequence of GLP-l(7-37)acid is SEQ ID NO: 50.
  • a glucagon peptide may exhibit at least 10% of the activity of native glucagon at the glucagon receptor and at least 50% of the activity of native GLP-I at the GLP-I receptor, or at least 40% of the activity of native glucagon at the glucagon receptor and at least 40% of the activity of native GLP-I at the GLP-I receptor, or at least 60% of the activity of native glucagon at the glucagon receptor and at least 60% of the activity of native GLP-I at the GLP-I receptor.
  • Selectivity of a glucagon peptide for the glucagon receptor versus the GLP-I receptor can be described as the relative ratio of glucagon/GLP-1 activity (the peptide's activity at the glucagon receptor relative to native glucagon, divided by the peptide's activity at the GLP-I receptor relative to native GLP-I).
  • a glucagon peptide that exhibits 60% of the activity of native glucagon at the glucagon receptor and 60% of the activity of native GLP-I at the GLP-I receptor has a 1:1 ratio of glucagon/GLP-1 activity.
  • Exemplary ratios of glucagon/GLP-1 activity include about 1:1, 1.5:1, 2:1, 3:1, 4: 1, 5:1, 6:1, 7: 1, 8:1, 9:1 or 10: 1, or about 1: 10, 1:9, 1:8, 1:7, 1:6, 1:5, 1:4, 1:3, 1:2, or 1:1.5.
  • a glucagon/GLP-1 activity ratio of 10:1 indicates a 10-fold selectivity for the glucagon receptor versus the GLP-I receptor.
  • a GLP-1/glucagon activity ratio of 10:1 indicates a 10-fold selectivity for the GLP-I receptor versus the glucagon receptor.
  • analogs of glucagon are provided that have enhanced potency and optionally improved solubility and stability.
  • enhanced glucagon potency is provided by an amino acid modification at position 16 of native glucagon (SEQ ID NO: 1).
  • such enhanced potency can be provided by substituting the naturally occurring serine at position 16 with glutamic acid or with another negatively charged amino acid having a side chain with a length of 4 atoms, or alternatively with any one of glutamine, homoglutamic acid, or homocysteic acid, or a charged amino acid having a side chain containing at least one heteroatom, (e.g.
  • the enhanced potency glucagon agonist comprises a peptide of SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ED NO: 6, SEQ BD NO: 7 or a glucagon agonist analog of SEQ ID NO: 5.
  • a glucagon analog protein having enhanced potency at the glucagon receptor relative to wild type glucagon wherein the peptide comprises the sequence of SEQ ED NO: 7, SEQ ED NO: 8, SEQ ED NO: 9 or SEQ ED NO: 10, wherein the glucagon peptide retains its selectivity for the glucagon receptor relative to the GLP-I receptors.
  • Glucagon receptor activity can be reduced by an amino acid modification at position 3, e.g. substitution of the naturally occurring glutamine at position 3 with any amino acid.
  • the analogs have about 10% or less of the activity of native glucagon at the glucagon receptor, e.g. about 1-10%, or about 0.1-10%, or greater than about 0.1% but less than about 10%, while exhibiting at least 20% of the activity of GLP-I at the GLP-I receptor.
  • exemplary analogs described herein have about 0.5%, about 1% or about 7% of the activity of native glucagon, while exhibiting at least 20% of the activity of GLP-I at the GLP-I receptor.
  • analogs of glucagon are provided that have enhanced or retained potency at the glucagon receptor relative to the native glucagon peptide, but also have greatly enhanced activity at the GLP-I receptor.
  • Glucagon normally has about 1% of the activity of native-GLP-1 at the GLP-I receptor, while GLP-I normally has less than about 0.01% of the activity of native glucagon at the glucagon receptor.
  • Enhanced activity at the GLP-I receptor is provided by replacing the carboxylic acid of the C-terminal amino acid with a charge-neutral group, such as an amide or ester.
  • these glucagon analogs comprise a sequence of SEQ ID NO: 20 wherein the carboxy terminal ammo acid has an amide group m place of the carboxylic acid group found on the native ammo acid.
  • These glucagon analogs have strong activity at both the glucagon and GLP-I receptors and thus act as co- agomsts at both receptors.
  • a glucagon and GLP- 1 receptor co-agonist is provided wherein the peptide comprises the sequence of SEQ ID NO: 20, wherein the ammo acid at position 28 is Asn or Lys and the ammo acid at position 29 is Thr-amide.
  • Enhanced activity at the GLP-I receptor is also provided by stabilizing the alpha-helix structure in the C-termmal portion of glucagon (around amino acids 12- 29), through formation of an intramolecular bridge between the side chains of two ammo acids that are separated by three intervening amino acids.
  • the b ⁇ dge or linker is about 8 (or about 7-9) atoms in length and forms between side chains of ammo acids at positions 12 and 16, or at positions 16 and 20, or at positions 20 and 24, or at positions 24 and 28.
  • the side chains of these ammo acids can be linked to one another through hydrogen-bonding or ionic interactions, such as the formation of salt b ⁇ dges, or by covalent bonds.
  • a glucagon agonist comprising a glucagon peptide of SEQ ID NO: 20, wherein a lactam ⁇ ng is formed between the side chains of a lysine residue, located at position 12, 20 or 28, and a glutamic acid residue, located at position 16 or 24, wherein the two amino acids of the glucagon peptide whose side chains participate in forming the lactam ⁇ ng are spaced from one another by three intervening ammo acids.
  • the lactam bea ⁇ ng glucagon analog comp ⁇ ses an ammo acid sequence selected from the group consisting of SEQ ED NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ED NO: 14, SEQ ED NO: 15, SEQ ED NO: 16, SEQ ED NO: 17 and SEQ ED NO: 18.
  • the carboxy terminal ammo acid of the lactam bearing peptide comp ⁇ ses an amide group or an ester group in place of the terminal carboxylic acid
  • a glucagon peptide of SEQ ED NO: 11, SEQ ED NO: 12, SEQ ED NO: 13, and SEQ ED NO: 14, SEQ ED NO: 15, SEQ ED NO: 16, SEQ ID NO' 17 and SEQ ED NO: 18 further comp ⁇ ses an additional ammo acid covalently bound to the carboxy terminus of SEQ ID NO: 11, SEQ ED NO: 12, SEQ ID NO: 13, SEQ ED NO: 14, SEQ ED NO. 15, SEQ ID NO: 16, SEQ ED NO: 17 or SEQ ID NO: 18.
  • a glucagon peptide comprising a sequence selected from the group consisting of SEQ ED NO: 66, SEQ ID NO: 67, SEQ ID NO: 68 and SEQ ID NO 69 further comp ⁇ ses an additional ammo acid covalently bound to the carboxy terminus of SEQ ID NO 66, SEQ ID NO. 67, SEQ ID NO: 68 and SEQ ID NO 69
  • the ammo acid at position 28 is aspaiagine or lysine and the ammo acid at position 29 is threonine.
  • Enhanced activity at the GLP-I receptor is also provided by an ammo acid modification at position 20
  • the glutamine at position 20 is replaced with another hydrophihc ammo acid having a side chain that is eithei charged or has an ability to hydrogen-bond, and is at least about 5 (or about 4-6) atoms in length, for example, lysine, citrulline, argimne, or ornithine.
  • the invention provides glucagon analogs that comp ⁇ se modifications at position 16, at position 20, and at the C-termmal carboxylic acid group, optionally with a covalent bond between the ammo acids at positions 16 and 20; glucagon analogs that comp ⁇ se modifications at position 16 and at the C- terminal carboxylic acid group; glucagon analogs that comprise modifications at positions 16 and 20, optionally with a covalent bond between the amino acids at positions 16 and 20; and glucagon analogs that comp ⁇ se modifications at position 20 and at the C-terminal carboxylic acid group, optionally with the proviso that the amino acid at position 12 is not Arg; or optionally with the proviso that the ammo acid at position 9 is not GIu.
  • DPP IV dipeptidyl peptidase IV
  • the amino acid at position 2 may be substituted with D-se ⁇ ne, alanine, D-alamne, valine, glycine, N-methyl se ⁇ ne, N-methyl alanine, or ammo isobutync acid.
  • ammo acid at position 1 may be substituted with D-histidme, desammohistidme, hydroxyl-histidme, acetyl-histidme, homo-histidme, N-methyl histidme, alpha-methyl histidine, imidazole acetic acid, or alpha, alpha-dimethyl lmidiazole acetic acid (DMIA).
  • D-histidme desammohistidme
  • hydroxyl-histidme hydroxyl-histidme
  • acetyl-histidme acetyl-histidme
  • homo-histidme N-methyl histidme
  • alpha-methyl histidine imidazole acetic acid
  • imidazole acetic acid or alpha, alpha-dimethyl lmidiazole acetic acid (DMIA).
  • modifications at position 2 may reduce glucagon activity, sometimes significantly; su ⁇ risingly, this reduction in glucagon activity can be restored by a covalent bond between amino acids at positions 12 and 16, 16 and 20, or 20 and 24, e.g. a lactam bridge between a glutamic acid at position 16 and a lysine at position 20.
  • any of the foregoing compounds can be further modified to improve stability by modifying the amino acid at position 15 of SEQ ID NO: 1 to reduce degradation of the peptide over time, especially in acidic or alkaline buffers.
  • the solubility of the glucagon peptides disclosed herein are enhanced by the covalent linkage of a hydrophilic moiety to the peptide.
  • the hydrophilic moiety is a polyethylene glycol (PEG) chain, optionally linked to the peptide at one or more of positions 16, 17, 21, 24, 29, or the C-terminus.
  • the native amino acid at that position is substituted with an amino acid having a side chain suitable for crosslinking with hydrophilic moieties, to facilitate linkage of the hydrophilic moiety to the peptide.
  • an amino acid modified to comprise a hydrophilic group is added to the peptide at the C- terminus.
  • the peptide co-agonist comprises a sequence selected from the group consisting of SEQ ED NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18 and SEQ ID NO: 19 wherein the side chain of an amino acid residue at one of position 16, 17, 21 or 24 of said glucagon peptide further comprises a polyethylene glycol chain, having a molecular weight selected from the range of about 500 to about 40,000 Daltons.
  • the polyethylene glycol chain has a molecular weight selected from the range of about 500 to about 5,000 Daltons.
  • the polyethylene glycol chain has a molecular weight of about 10,000 to about 20,000 Daltons.
  • the polyethylene glycol chain has a molecular weight of about 20,000 to about 40,000 Daltons.
  • the solubility of any of the preceding glucagon analogs can be improved by amino acid substitutions and/or additions that introduce a charged amino acid into the C-terminal portion of the peptide, preferably at a position C- terminal to position 27 of SEQ ED NO: 1.
  • amino acid substitutions and/or additions that introduce a charged amino acid into the C-terminal portion of the peptide, preferably at a position C- terminal to position 27 of SEQ ED NO: 1.
  • one, two or three charged amino acids may be introduced within the C-terminal portion, preferably C-terminal to position 27.
  • the native amino acid(s) at positions 28 and/or 29 are substituted with a charged amino acids, and/or in a further embodiment one to three charged ammo acids are also added to the C-termmus of the peptide
  • one, two or all of the charged ammo acids are negatively charged Additional modifications, e g conservative substitutions, may be made to the glucagon peptide that still allow it to retain glucagon activity
  • an analog of the peptide of SEQ E) NO 20 is piovided wherein the analog differs from SEQ ID NO: 20 by 1 to 2 ammo acid substitutions at positions 17- 26, and in one embodiment the analog differs from the peptide of SEQ ID NO" 20 by an amino acid substitution at position 20.
  • glucagon peptides disclosed herein are modified by the addition of a second peptide to the carboxy terminus of the glucagon peptide, for example, SEQ E) NO: 26, SEQ ID NO: 27 or SEQ ID NO: 28.
  • a glucagon peptide having a peptide sequence selected from the group consisting of SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18, SEQ ID NO: 19, SEQ ID NO: 66, SEQ ID NO: 67, SEQ ID NO: 68, and SEQ ID NO: 69 is covalently bound through a peptide bond to a second peptide, wherein the second peptide comprises a sequence selected from the group consisting of SEQ ID NO: 26, SEQ E) NO: 27 and SEQ E) NO: 28.
  • m glucagon peptides which comp ⁇ se the C-termmal extension the threonine at position 29 of the native glucagon peptide is replaced with a glycine.
  • a glucagon analog having a glycine substitution for threonine at position 29 and comprising the carboxy terminal extension of SEQ E) NO: 26 is four times as potent at the GLP-I receptor as native glucagon modified to comprise the carboxy terminal extension of SEQ E) NO: 26. Potency at the GLP-I receptor can be further enhanced by an alanine substitution for the native argimne at position 18.
  • high potency glucagon analogs or glucagon co- agomst analogs are provided that also exhibit improved solubility and/or stability
  • An exemplary high potency glucagon analog exhibits at least about 200% of the activity of native glucagon at the glucagon receptor, and optionally is soluble at a concentration of at least 1 mg/mL at a pH between 6 and 8 (e.g. pH 7), and optionally retains at least 95% of the original peptide (e.g. 5% or less of the original peptide is degraded or cleaved) after 24 hours at 25°C.
  • an exemplary glucagon co-agonist analog exhibits greater than about 40% or greater than about 60% activity at both the glucagon and the GLP-I receptors (at a ratio between about 1:3 and 3:1, or between about 1:2 and 2 1), is optionally soluble at a concentration of at least 1 mg/mL at a pH between 6 and 8 (e g pH 7), and optionally retains at least 95% of the original peptide after 24 hours at 25 °C
  • Another exemplary glucagon co- agonist analog exhibits about 175% or more of the activity of native glucagon at the glucagon receptor and about 20% or less of the activity of native GLP-I at the GLP-I receptor, is optionally soluble at a concentration of at least 1 mg/mL at a pH between 6 and 8 (e.g.
  • glucagon co-agomst analog exhibits about 10% or less of the activity of native glucagon at the glucagon receptor and at least about 20% of the activity of native GLP-I at the GLP-I receptor, is optionally soluble at a concentration of at least 1 mg/mL at a pH between 6 and 8 (e.g. pH 7), and optionally retains at least 95% of the original peptide after 24 hours at 25 ° C.
  • Yet another exemplary glucagon co-agonist analog exhibits about 10% or less but above 0.1% , 0.5% or 1% of the activity of native glucagon at the glucagon receptor and at least about 50%, 60%, 70%, 80%, 90% or 100% or more of the activity of native GLP-I at the GLP-I receptor, is optionally soluble at a concentration of at least 1 mg/mL at a pH between 6 and 8 (e.g. pH 7), and optionally retains at least 95% of the original peptide after 24 hours at 25°C.
  • such glucagon analogs retain at least 22, 23, 24, 25, 26, 27 or 28 of the naturally occurring ammo acids at the corresponding positions in native glucagon (e.g. have 1-7, 1-5 or 1-3 modifications relative to naturally occurring glucagon).
  • any one of the following peptides is excluded from the compounds of the invention, although further modifications thereto exhibiting the desired co-agonist activity, pharmaceutical compositions, kits, and treatment methods using such compounds may be included in the invention-
  • a pharmaceutical composition is provided compiismg any of the novel glucagon peptides disclosed herein, preferably sterile and preferably at a purity level of at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%, and a pharmaceutically acceptable diluent, earner or excipient.
  • compositions may contain a glucagon peptide at a concentration of at least 0.5 mg/ml, 1 mg/ml, 2 mg/ml, 3 mg/ml, 4 mg/ml, 5 mg/ml, 6 mg/ml, 7 mg/ml, 8 mg/ml, 9 mg/ml, 10 mg/ml, 11 mg/ml, 12 mg/ml, 13 mg/ml, 14 mg/ml, 15 mg/ml, 16 mg/ml, 17 mg/ml, 18 mg/ml, 19 mg/ml, 20 mg/ml, 21 mg/ml, 22 mg/ml, 23 mg/ml, 24 mg/ml, 25 mg/ml or higher.
  • the pharmaceutical compositions comprise aqueous solutions that are sterilized and optionally stored withm va ⁇ ous containers.
  • the compounds of the present invention can be used in accordance with one embodiment to prepare pre-formulated solutions ready for injection.
  • the pharmaceutical compositions comprise a lyophilized powder.
  • the pharmaceutical compositions can be further packaged as part of a kit that includes a disposable device for administering the composition to a patient.
  • the containers or kits may be labeled for storage at ambient room temperature or at refrigerated temperature.
  • a method of rapidly increasing glucose level or treating hypoglycemia using a pre-formulated aqueous composition of glucagon peptides of the invention comprises the step of administering an effective amount of an aqueous solution comprising a novel modified glucagon peptide of the present disclosure
  • the glucagon peptide is pegylated at position 21 or 24 of the glucagon peptide and the PEG chain has a molecular weight of about 500 to about 5,000 Daltons.
  • the modified glucagon solution is prepackaged m a device that is used to administer the composition to the patient suffe ⁇ ng from hypoglycemia.
  • an improved method of regulating blood glucose levels m insulin dependent patients comp ⁇ ses the steps of administering msulm in an amount therapeutically effective for the contiol of diabetes and administering a novel modified glucagon peptide of the present disclosure in an amount theiapeutically effective for the prevention of hypoglycemia, wherein said administering steps aie conducted within twelve hours of each othei.
  • the glucagon peptide and the msulm are co-admimstered as a single composition, wherein the glucagon peptide is pegylated with a PEG chain having a molecular weight selected from the range of about 5,000 to about 40,000 Daltons
  • a method for inducing the temporary paralysis of the intestinal tract comprises the step of administering one or more of the glucagon peptides disclosed herein to a patient.
  • a method of treating hyperglycemia, or a method of reducing weight gam or inducing weight loss involves administering an effective amount of an aqueous solution comprising a glucagon peptide of the invention.
  • a composition comprising a glucagon agonist selected from the group consisting of SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ED NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18 and SEQ ID NO. 19.
  • the method comp ⁇ ses administe ⁇ ng an effective amount of a composition comprising a glucagon agonist, wherein the glucagon agonist comprising a glucagon peptide selected from the group consisting of SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ED NO: 15, SEQ ED NO 16, SEQ ED NO: 17, SEQ ED NO: 18, SEQ ID NO 19, SEQ ED NO: 66, SEQ ED NO 67, SEQ ED NO.
  • the invention provides novel methods for treating hyperglycemia and novel methods for decreasing appetite or piomotmg body weight loss that involve administration of a glucagon/GLP-1 co-agonist molecule (including pharmaceutically acceptable salts thereof) that activates both the glucagon receptor and the GLP-I ieceptor Agonism, i e , activation, of both the glucagon and GLP-I receptors provides an unexpected improvement compared to GLP-I agonism alone in tieating hyperglycemia
  • glucagon agonism piovides an unexpected additive or synergistic effect, oi other unexpected clinical benefit(s) Administration with a conventional dose of insulin, a reduced dose of insulin, or without insulin is contemplated according to such methods.
  • Agonism of the glucagon receptor also has an unexpected beneficial effect compared to GLP-I agonism alone in promoting weight loss or preventing weight gam.
  • Exemplary glucagon/GLP-1 co-agonist molecules include glucagon peptides of the invention, GLP-I analogs that activate both GLP-I and glucagon receptors, fusions of glucagon and GLP-I, or fusions of glucagon analogs and GLP-I analogs, or chemically modified de ⁇ vatives thereof.
  • a compound that activates the glucagon receptor can be co-administered with a compound that activates the
  • GLP-I receptor such as a GLP-I analog, an exendin-4 analog, or derivatives thereof.
  • the invention also contemplates co-admimstration of a glucagon agonist analog with a GLP-I agonist analog.
  • Such methods for treating hyperglycemia and/or for decreasing appetite or promoting body weight loss include administration of a glucagon analog with a modification at position 12 (e.g. Argl2), optionally in combination with modifications at position 16 and/or 20.
  • the methods of the invention also include administration of glucagon analogs composing an intramolecular bridge between the side chains of two ammo acids within the region of ammo acids 12 and 29 that are separated by three intervening ammo acids, e.g positions 12 and 16, positions 13 and 17 (e.g,. Lysl3 GIu 17 or GIu 13 Lysl7), positions 16 and 20, positions 17 and 21 (e.g.
  • glucagon/GLP-1 co-agonist molecules are any glucagon analogs or GLP-I analogs in the p ⁇ or art known to be useful in such a method.
  • peptides described m U S Patent No. 6,864,069 as acting as both a GLP-I agonist and a glucagon antagonist for treating diabetes are also excluded as glucagon/GLP-1 co-agonist molecules.
  • glucagon antagonists to treat diabetes, such as the antagonists described in Unson et al., J. Biol. Chem., 264:789-794 (1989), Ahn et al., J. Med. Chem., 44:3109-3116 (2001), and Sapse et al., MoL Med., 8(5):251-262 (2002).
  • oxyntomodulin or a glucagon analog that contains the 8 C-terminal amino acids of oxyntomodulin are also excluded as glucagon/GLP-1 co-agonist molecules.
  • Such methods for treating hyperglycemia are expected to be useful for a variety of types of hyperglycemia, including diabetes, diabetes mellitus type I, diabetes mellitus type II, or gestational diabetes, either insulin-dependent or non- insulin-dependent, and reducing complications of diabetes including nephropathy, retinopathy and vascular disease.
  • Such methods for reducing appetite or promoting loss of body weight are expected to be useful in reducing body weight, preventing weight gain, or treating obesity of various causes, including drug-induced obesity, and reducing complications associated with obesity including vascular disease (coronary artery disease, stroke, peripheral vascular disease, ischemia reperfusion, etc.), hypertension, onset of diabetes type II, hyperlipidemia and musculoskeletal diseases.
  • glucagon analogs includes all pharmaceutically acceptable salts or esters thereof.
  • Fig. 1 is a bar graph representing the stability of Glucagon Cys 21 maleimidoPEG 5K at 37 0 C incubated for 24, 48, 72, 96, 144 and 166 hours, respectively.
  • Fig. 2 represents data generated from HPLC analysis of Glucagon Cys 21 maleimidoPEG 5K at pH 5 incubated at 37 0 C for 24, 72 or 144 hours, respectively.
  • Fig. 3 represents data showing receptor mediated cAMP induction by glucagon analogs. More particularly, Fig. 3A compares induction of the glucagon receptor by glucagon analogs E16, K20 •, E15, E16 A, E16, K20 T, E15, E16 ⁇ E16 ⁇ and GIuC-NH 2 ⁇ Fig. 4A and 4B represents data showing receptor mediated cAMP induction by glucagon analogs. More particularly, Fig.
  • FIG. 4A compares induction of the glucagon receptor by glucagon analogs GIuC-NH 2 #, E16Gluc-NH 2 A, E3, E16 GIuC-NH 2 T, Orn3, E16 GIuC-NH 2 -4 and Nle3, E16 GIuC-NH 2 , ⁇ relative to native glucagon ⁇
  • Fig. 4B compares induction of the GLP-I receptor by glucagon analogs GIuC-NH 2 •, E16 GIuC-NH 2 A, E3, E16Gluc-NH 2 T, Orn3, E16 Gluc-NH, ⁇ and Nle3, E16 GIuC-NH 2 , ⁇ relative to native GLP-I ⁇ .
  • Fig. 5A and 5B represents data showing receptor mediated cAMP induction by glucagon analogs. More particularly, Fig. 5A compares induction of the glucagon receptor by glucagon analogs (E16, K20 GIuC-NH 2 •( ⁇ nM, stock solution), E15, E16 GlUC-NH 2 A(5nM, stock solution), E16, K20 GIuC-NH 2 T(IOnM, stock solution), E15, E16 GlUC-NH 2 ⁇ (1OnM, stock solution) and E16 GIuC-NH 2 ⁇ ) relative to glucagon-NH 2 ( ⁇ ), whereas Fig.
  • 5B compares induction of the GLP-I receptor by glucagon analogs (E16, K20 GIuC-NH 2 #, E15, E16 GIuC-NH 2 A, and E16 Gluc- NH 2 , ⁇ ) relative to GLP-I ( ⁇ ) and glucagon-NH 2 (D).
  • Fig. 6A and 6B represents data showing receptor mediated cAMP induction by glucagon analogs. More particularly, Fig. 6A compares induction of the glucagon receptor by glucagon analogs (GIuC-NH 2 •, K12E16-NH 2 lactam A, E16K20-NH 2 lactam T, K20E24-NH 2 lactam A and E24K28-NH 2 lactam ⁇ ) relative to glucagon ( ⁇ ), whereas Fig.
  • GLP-I receptor 6B compares induction of the GLP-I receptor by glucagon analogs (GIuC-NH 2 #, K12E16-NH 2 lactam A, E16K20-NH 2 lactam T, K20E24-NH 2 lactam ⁇ and E24K28-NH 2 lactam ⁇ ) relative to GLP-I ( ⁇ ).
  • Fig. 7A and 7B represents data showing receptor mediated cAMP induction by glucagon analogs. More particularly, Fig. 7A compares induction of the glucagon receptor by glucagon analogs (GIuC-NH 2 •, E16 GIuC-NH 2 , A, K12, E16 GIuC-NH 2 lactam T, E16, K20 GIuC-NH 2 ⁇ and E16, K20 GIuC-NH 2 lactam ⁇ ) relative to glucagon ( ⁇ ), whereas Fig.
  • FIG. 7B compares induction of the GLP-I receptor by glucagon analogs (GIuC-NH 2 #, E16 GIuC-NH 2 , A, K12, E16 GIuC-NH 2 lactam T, E16, K20 GIuC-NH 2 M and E16, K20 GIuC-NH 2 lactam ⁇ ) relative to GLP-I ( ⁇ ).
  • Fig. 9A and 9B represent data showing receptor mediated cAMP induction by GLP (17-26) glucagon analogs, wherein amino acid positions 17-26 of native glucagon (SEQ ID NO: 1) have been substituted with the amino acids of positions 17- 26 of native GLP-I (SEQ ED NO: 50). More particularly, Fig. 9A compares induction of the glucagon receptor by the designated GLP (17-26) glucagon analogs, and Fig. 9B compares induction of the GLP-I receptor by the designated GLP (17-26) glucagon analogs.
  • Figs. 10A-E are graphs providing in vivo data demonstrating the ability of the glucagon peptides of the present invention to induce weight loss in mice injected subcutaneously with the indicated amounts of the respective compounds.
  • Sequence Identifiers for the glucagon peptide listed in Figs 1OA -1OE are as follows, for Fig. 1OA: Chimera 2 Aib2 C24 4OK PEG (SEQ ID NO: 486), Aib2 C24 Chimera 2 4OK lactam (SEQ ID NO: 504) and Aib2 E16 K20 Gluc-NH2 Lac 4OK (SEQ ID NO: 528); Fig.
  • 10D AEB2 w lactam C24 4OK (SEQ ED NO: 504), AIB2 E16 K20 w lactam C24 4OK (SEQ ED NO: 528), DMIAl E16 K20 w lactam C24 4OK (SEQ ED NO: 510) and DMIAl E16 K20 w lactam/Cex C244OK (SEQ ED NO: 513), wherein the number at the end of the sequence designates the dosage used, either 14 or 70 nmol/kg/wk; Fig.
  • AIB2 w/o lactam C24 4OK (SEQ ED NO: 486), Chi 2 AIB2 C24 CEX 4OK (SEQ ED NO: 533), AIB2 E16 A18 K20 C24 4OK (SEQ ID NO: 492), AEB2 w/o lactam CEX G29 C40 4OK (SEQ ED NO: 488), AIB2 w/o lactam CEX C40 C41-2 (SEQ ED NO: 532), AEB2 w/o lactam CEX C24 C40- 2 (SEQ ID NO: 531) and AIB2 w/o lactam C24 6OK (SEQ ED NO: 498), wherein the designation 4OK or 6OK represents the molecular weight of the polyethylene chain attached to the glucagon peptide.
  • 4OK or 6OK represents the molecular weight of the polyethylene chain attached to the glucagon peptide.
  • the term "pharmaceutically acceptable earner” includes any of the standard pharmaceutical earners, such as a phosphate buffered salme solution, water, emulsions such as an oil/water or water/oil emulsion, and various types of wetting agents.
  • the term also encompasses any of the agents approved by a regulatory agency of the US Federal government or listed m the US Pharmacopeia for use in animals, including humans.
  • pharmaceutically acceptable salt refers to salts of compounds that retain the biological activity of the parent compound, and which are not biologically or otherwise undesirable. Many of the compounds disclosed herein are capable of forming acid and/or base salts by virtue of the presence of ammo and/or carboxyl groups or groups similar thereto.
  • Pharmaceutically acceptable base addition salts can be prepared from inorganic and organic bases.
  • Salts de ⁇ ved from inorganic bases include by way of example only, sodium, potassium, lithium, ammonium, calcium and magnesium salts.
  • Salts de ⁇ ved from organic bases include, but are not limited to, salts of p ⁇ mary, secondary and tertiary amines.
  • Salts de ⁇ ved from inorganic acids include hydrochlo ⁇ c acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like.
  • Salts derived from organic acids include acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumanc acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, p-toluene-sulfonic acid, salicylic acid, and the like.
  • treating includes prophylaxis of the specific disorder or condition, or alleviation of the symptoms associated with a specific disorder or condition and/or preventing or eliminating said symptoms.
  • treating diabetes will refer m general to altering glucose blood levels m the direction of normal levels and may include increasing or decreasing blood glucose levels depending on a given situation.
  • an "effective" amount oi a "therapeutically effective amount" of a glucagon peptide refers to a nontoxic but sufficient amount of the peptide to provide the desired effect
  • one desired effect would be the prevention or treatment of hypoglycemia, as measuied, foi example, by an increase in blood glucose level.
  • An alternative desired effect for the co-agonist analogs of the present disclosure would include treating hyperglycemia, e g , as measured by a change in blood glucose level closer to normal, or inducing weight loss/preventing weight gain, e.g., as measured by reduction in body weight, or preventing or reducing an increase m body weight, or normalizing body fat distribution.
  • the amount that is "effective” will vary from subject to subject, depending on the age and general condition of the individual, mode of administration, and the like. Thus, it is not always possible to specify an exact “effective amount.” However, an approp ⁇ ate “effective” amount m any individual case may be determined by one of ordinary skill in the art using routine expe ⁇ mentation.
  • parenteral means not through the alimentary canal but by some other route such as subcutaneous, intramuscular, intraspinal, or intravenous.
  • purified and like terms relate to the isolation of a molecule or compound in a form that is substantially free of contaminants normally associated with the molecule or compound in a native or natural environment. As used herein, the term “purified” does not require absolute pu ⁇ ty; rather, it is intended as a relative definition.
  • purified polypeptide is used herein to describe a polypeptide which has been separated from other compounds including, but not limited to nucleic acid molecules, lipids and carbohydrates.
  • isolated requires that the referenced mate ⁇ al be removed from its original environment (e g , the natuial environment if it is naturally occurring)
  • a naturally-occurring polynucleotide present in a living animal is not isolated, but the same polynucleotide, separated from some or all of the coexisting materials in the natural system, is isolated.
  • peptide encompasses a sequence of 3 or more amino acids and typically less than 50 ammo acids, wherein the ammo acids are naturally occurring or non-naturally occurring ammo acids
  • Non-naturally occurring ammo acids refer to ammo acids that do not naturally occur in vivo but which, nevertheless, can be incorporated into the peptide structures desc ⁇ bed herein.
  • polypeptide and “protein” are terms that are used interchangeably to refer to a polymei of amino acids, without regard to the length of the polymer. Typically, polypeptides and proteins have a polymer length that is greater than that of "peptides.”
  • a "glucagon peptide” as used herein includes any peptide comprising, either the ammo acid sequence of SEQ ID NO: 1, or any analog of the ammo acid sequence of SEQ ED NO: 1, including ammo acid substitutions, additions, deletions or post translational modifications (e.g., methylation, acylation, ubiquitmation, intramolecular covalent bonding such as lactam bridge formation, PEGylation, and the like) of the peptide, wherein the analog stimulates glucagon or GLP-I receptor activity, e.g., as measured by cAMP production using the assay desc ⁇ bed in Example 14.
  • glucagon agonist refers to a complex comp ⁇ sing a glucagon peptide that stimulates glucagon receptor activity, e.g., as measured by cAMP production using the assay desc ⁇ bed in Example 14.
  • glucagon agonist analog is a glucagon peptide comp ⁇ sing a sequence selected from the group consisting of SEQ ID NO: 10, SEQ BD NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14 and SEQ ID NO: 15, or an analog of such a sequence that has been modified to include one or more conservative ammo acid substitutions at one or more of positions 2, 5, 7, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 24, 27, 28 or 29.
  • an ammo acid “modification” refers to a substitution, addition or deletion of an amino acid, and includes substitution with or addition of any of the 20 amino acids commonly found m human proteins, as well as atypical or non- naturally occurring amino acids.
  • all references to a particular ammo acid position by number refer to the ammo acid at that position in native glucagon (SEQ ID NO: 1) or the corresponding ammo acid position in any analogs thereof.
  • position 28 would mean the corresponding position 27 for a glucagon analog in which the first ammo acid of SEQ ID NO: 1 has been deleted.
  • a reference herein to "position 28" would mean the corresponding position 29 for a glucagon analog in which one ammo acid has been added before the N-terminus of SEQ ID NO: 1.
  • Commercial sources of atypical ammo acids include Sigma-Ald ⁇ ch (Milwaukee, WI), ChemPep Inc. (Miami, FL), and Genzyme Pharmaceuticals (Camb ⁇ dge, MA).
  • Atypical ammo acids may be purchased from commercial suppliers, synthesized de novo, or chemically modified or de ⁇ vatized from other ammo acids.
  • glucagon co-agonist is a glucagon peptide that exhibits activity at the glucagon receptor of at least about 10% to about 500% or more relative to native glucagon and also exhibits activity at the GLP-I receptor of about at least 10% to about 200% or more relative to native GLP-I.
  • glucagon/GLP-1 co-agonist molecule is a molecule that exhibits activity at the glucagon receptor of at least about 10% relative to native glucagon and also exhibits activity at the GLP-I receptor of at least about 10% relative to native GLP-I .
  • glucagon refers to a peptide consisting of the sequence of SEQ ED NO: 1
  • native GLP-I is a gene ⁇ c term that designates GLP-l(7-36)amide (consisting of the sequence of SEQ ID NO: 52), GLP- l(7-37)acid (consisting of the sequence of SEQ ID NO: 50) or a mixture of those two compounds.
  • glucagon or “GLP-I” in the absence of any further designation is intended to mean native glucagon or native GLP-I, respectively.
  • an amino acid “substitution” refers to the replacement of one ammo acid residue by a different ammo acid residue.
  • polyethylene glycol chain or "PEG chain” refeis to mixtures of condensation polymers of ethylene oxide and water, in a branched or straight chain, represented by the general formula HfOCEbCE ⁇ nOH, wherein n is at least 9 Absent any further characterization, the term is intended to include polymers of ethylene glycol with an average total molecular weight selected from the range of 500 to 40,000 Daltons.
  • polyethylene glycol chain or “PEG chain” is used in combination with a nume ⁇ c suffix to indicate the approximate average molecular weight thereof. For example, PEG-5,000 refers to polyethylene glycol chain having a total molecular weight average of about 5,000.
  • pegylated and like terms refers to a compound that has been modified from its native state by linking a polyethylene glycol chain to the compound.
  • a “pegylated glucagon peptide” is a glucagon peptide that has a PEG chain covalently bound to the glucagon peptide.
  • a general reference to a peptide is intended to encompass peptides that have modified amino and carboxy termini.
  • an amino acid chain composing an amide group in place of the terminal carboxylic acid is intended to be encompassed by an ammo acid sequence designating the standard ammo acids.
  • a "linker" is a bond, molecule or group of molecules that binds two separate entities to one another. Linkers may provide for optimal spacing of the two entities or may further supply a labile linkage that allows the two entities to be separated from each other. Labile linkages include photocleavable groups, acid-labile moieties, base-labile moieties and enzyme-cleavable groups.
  • dimer is a complex comprising two subunits covalently bound to one another via a linker.
  • dimer when used absent any qualifying language, encompasses both homodimers and heterodimers A homodimer comprises two identical subunits, whereas a heterodimer comp ⁇ ses two subunits that differ, although the two subunits are substantially similar to one another.
  • charged ammo acid refers to an ammo acid that comprises a side chain that is negatively charged (i.e., de-protonated) or positively charged (i.e., protonated) in aqueous solution at physiological pH
  • negatively charged ammo acids include aspartic acid, glutamic acid, cysteic acid, homocysteic acid, and homoglutamic acid
  • positively charged ammo acids include argmme, lysine and histidme.
  • Charged ammo acids include the charged ammo acids among the 20 ammo acids commonly found in human proteins, as well as atypical or non-naturally occurring ammo acids.
  • acidic ammo acid refers to an ammo acid that comprises a second acidic moiety, including for example, a carboxylic acid or sulfonic acid group.
  • the invention provides glucagon peptides with increased or decreased activity at the glucagon receptor, or GLP-I receptor, or both.
  • the invention also provides glucagon peptides with altered selectivity for the glucagon receptor versus the GLP-I receptor.
  • Increased activity at the glucagon receptor is provided by an ammo acid modification at position 16 of native glucagon (SEQ ID NO: 1) as described herein.
  • Reduced activity at the glucagon receptor is provided, e.g., by an ammo acid modification at position 3 as desc ⁇ bed herein.
  • Increased activity at the GLP-I receptor is provided by replacing the carboxylic acid of the C-termmal ammo acid with a charge-neutral group, such as an amide or ester.
  • Increased activity at the GLP-I receptor is provided by modifications that permit formation of an intramolecular b ⁇ dge between the side chains of two amino acids that are separated by three intervening ammo acids, for example, positions 12 and 16, or 16 and 20, or 20 and 24, as described herein.
  • Increased activity at the GLP-I receptor is provided by an ammo acid modification at position 20 as desc ⁇ bed herein
  • GLP-I activity at the GLP-I receptor is provided in glucagon analogs comprising the C-termmal extension of SEQ ID NO: 26.
  • GLP-I activity in such analogs comprising SEQ ID NO: 26 can be further increased by modifying the ammo acid at position 18, 28 or 29, or at position 18 and 29, as described herein.
  • glucagon activity which has been reduced by ammo acid modifications at positions 1 and 2 is provided by a covalent bond between the side chains of two ammo acids that are separated by three intervening ammo acids, for example, positions 12 and 16, oi 16 and 20, or 20 and 24, as described herein.
  • a further modest mciease m GLP-I potency is piovided by modifying the ammo acid at position 10 to be Tip
  • Any of the modifications described above which increase or decrease glucagon receptor activity and which increase GLP-I receptor activity can be applied individually or in combination
  • Any of the modifications described above can also be combined with other modifications that confer other desirable properties, such as increased solubility and/or stability and/or duration of action
  • any of the modifications desc ⁇ bed above can be combined with other modifications that do not substantially affect solubility or stability or activity
  • Exemplary modifications include but are not limited to:
  • (A) Improving solubility for example, by introducing one, two, three or more charged ammo acid(s) to the C-termmal portion of native glucagon, preferably at a position C-terminal to position 27.
  • a charged ammo acid can be introduced by substituting a native ammo acid with a charged ammo acid, e.g. at positions 28 or 29, or alternatively by adding a charged amino acid, e.g. after position 27, 28 or 29.
  • one, two, three or all of the charged ammo acids are negatively charged.
  • one, two, three or all of the charged ammo acids are positively charged.
  • Such modifications increase solubility, e.g. provide at least 2-fold, 5-fold, 10-fold, 15-fold, 25-fold, 30-fold or greater solubility relative to native glucagon at a given pH between about 5.5 and 8, e.g., pH 7, when measured after 24 hours at 25°C.
  • (C) Increasing stability by modification of the aspartic acid at position 15, for example, by deletion or substitution with glutamic acid, homoglutamic acid, cysteic acid or homocysteic acid Such modifications can reduce degradation or cleavage at a pH withm the range of 5.5 to 8, for example, retaining at least 75%, 80%, 90%, 95%, 96%, 97%, 98% or 99% of the original peptide after 24 hours at 25°C
  • D Increasing stability by modification of the ammo acid at position 27, for example, by substitution with methionine, leucine or norleucine Such modifications can reduce oxidative degradation
  • the glucagon peptide may comp ⁇ se a total of 1, up to 2, up to 3, up to 4, up to 5, up to 6, up to 7, up to 8, up to 9, or up to 10 ammo acid modifications relative to the native glucagon sequence. .
  • One embodiment disclosed herein is directed to a glucagon agonist that has been modified relative to the wild type peptide of His-Ser-Gln-Gly-Thr-Phe- Thr-Ser- Asp-Tyr-Ser-Lys-Tyr-Leu-Asp-Ser- Arg-Arg-Ala-Gln-Asp-Phe-Val-Gln-Trp-Leu- Met-Asn-Thr (SEQ ID NO: 1) to enhance the peptide's potency at the glucagon receptor.
  • the normally occurring se ⁇ ne at position 16 of native glucagon can be substituted with select acidic ammo acids to enhance the potency of glucagon, in terms of its ability to stimulate cAMP synthesis in a validated in vitro model assay (see Example 14). More particularly, this substitution enhances the potency of the analog at least 2-fold, A- fold, 5-fold, and up to 10-fold greater at the glucagon receptor. This substitution also enhances the analog's activity at the GLP-I receptor at least 5-fold, 10-fold, or 15- fold relative to native glucagon, but selectivity is maintained for the glucagon receptor over the GLP-I receptor.
  • the serine residue at position 16 of native glucagon is substituted with an ammo acid selected from the group consisting of glutamic acid, glutamme, homoglutamic acid, homocysteic acid, threonine or glycine.
  • the serine residue at position 16 of native glucagon is substituted with an ammo acid selected from the group consisting of glutamic acid, glutamme, homoglutamic acid and homocysteic acid, and in one embodiment the serine residue is substituted with glutamic acid
  • the glucagon peptide having enhanced specificity foi the glucagon ieceptoi comprises the peptide of SEQ ID NO 8, SEQ ID NO: 9, SEQ ID NO 10 oi a glucagon agonist analog thereof, wherein the carboxy terminal ammo acid ietains its native carboxyhc acid gioup
  • a glucagon agonist comprising the sequence of NH 2 -His-Ser-Gln-Gly-Thr-Phe- Thr-Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Asp- Glu-Aig-Aig-Ala-Gln-As
  • the glucagon peptides of the present invention can be further modified to improve the peptide's solubility and stability in aqueous solutions at physiological pH, while retaining the high biological activity relative to native glucagon.
  • introduction of hydrophilic groups at positions 17, 21, and 24 of the peptide of SEQ ID NO. 9 or SEQ ID NO: 10 are anticipated to improve the solubility and stability of the high potency glucagon analog in solutions having a physiological pH. Introduction of such groups also increases duration of action, e.g as measured by a prolonged half-life in circulation.
  • Suitable hydrophilic moieties include any water soluble polymers known in the art, including PEG, homo- or copolymers of PEG, a monomethyl-substituted polymer of PEG (mPEG), or polyoxyethylene glycerol (POG)
  • the hydrophilic group comprises a polyethylene (PEG) chain
  • the glucagon peptide comprises the sequence of SEQ ID NO 6 or SEQ ID NO 7 wherein a PEG chain is covalently linked to the side chains of ammo acids present at positions 21 and 24 of the glucagon peptide and the carboxy terminal ammo acid of the peptide has the carboxyhc acid group
  • the present disclosure also encompasses other conjugates in which glucagon peptides of the invention are linked, optionally via covalent bonding and optionally via a linker, to a conjugate Linkage can be accomplished by covalent chemical bonds, physical forces such electrostatic, hydrogen, ionic, van der Waals, or hydrophobic or hydrophilic interactions.
  • a variety of non-covalent coupling systems may be used, including biotin-avidin, ligand/receptor, enzyme/substiate, nucleic acid/nucleic acid binding protein, lipid/lipid binding protein, cellular adhesion molecule partners; or any binding partners or fragments thereof which have affinity for each other
  • conjugates include but are not limited to a heterologous peptide or polypeptide (including for example, a plasma protein), a targeting agent, an immunoglobulin or portion thereof (e.g. variable region, CDR, or Fc region), a diagnostic label such as a radioisotope, fluorophore or enzymatic label, a polymer including water soluble polymers, or other therapeutic or diagnostic agents.
  • a conjugate is provided comprising a glucagon peptide of the present invention and a plasma protein, wherein the plasma protein is selected form the group consisting of albumin, transferm, fibrinogen and glubuhns.
  • the plasma protein moiety of the conjugate is albumin or transferm.
  • the linker comp ⁇ ses a chain of atoms from 1 to about 60, or 1 to 30 atoms or longer, 2 to 5 atoms, 2 to 10 atoms, 5 to 10 atoms, or 10 to 20 atoms long.
  • the chain atoms are all carbon atoms.
  • the chain atoms m the backbone of the linker are selected from the group consisting of C, O, N, and S.
  • Cham atoms and linkers may be selected according to their expected solubility (hydrophihcity) so as to provide a more soluble conjugate.
  • the linker provides a functional group that is subject to cleavage by an enzyme or other catalyst or hydrolytic conditions found in the target tissue or organ or cell.
  • the length of the linker is long enough to reduce the potential for ste ⁇ c hindrance. If the linker is a covalent bond or a peptidyl bond and the conjugate is a polypeptide, the entire conjugate can be a fusion protein.
  • Such peptidyl linkers may be any length. Exemplary linkers are from about 1 to 50 amino acids in length, 5 to 50, 3 to 5, 5 to 10, 5 to 15, or 10 to 30 ammo acids in length.
  • Such fusion proteins may alternatively be produced by recombinant genetic enginee ⁇ ng methods known to one of ordinary skill in the art.
  • the present disclosure also encompasses glucagon fusion peptides or proteins wherein a second peptide or polypeptide has been fused to a terminus, e.g., the carboxy terminus of the glucagon peptide.
  • the fusion glucagon peptide may comprise a glucagon agonist of SEQ ID NO: 55, SEQ ID NO' 9 or SEQ ID NO' 10 further comprising an ammo acid sequence of SEQ ED NO 26 (GPSSGAPPPS), SEQ ID NO: 27 (KRNRNNIA) or SEQ ID NO: 28 (KRNR) linked to ammo acid 29 of the glucagon peptide
  • the ammo acid sequence of SEQ ID NO: 26 (GPSSGAPPPS), SEQ ED NO 27 (KRNRNNIA) or SEQ ID NO: 28 (KRNR) is bound to ammo acid 29 of the glucagon peptide through a peptide bond Applicants have discovered that in glucagon fusion peptide
  • This ammo acid substitution can be used in conjunction with other modifications disclosed herein to enhance the affinity of the glucagon analogs for the GLP-I receptor.
  • the T29G substitution can be combined with the S16E and N20K amino acid substitutions, optionally with a lactam b ⁇ dge between amino acids 16 and 20, and optionally with addition of a PEG chain as desc ⁇ bed herein.
  • a glucagon/GLP-1 receptor co-agonist is provided, comp ⁇ sing the sequence of SEQ ID NO: 64.
  • the glucagon peptide portion of the glucagon fusion peptide is selected from the group consisting of SEQ ID NO: 55, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, and SEQ ID NO: 5 wherein a PEG chain, when present at positions 17, 21, 24, or the C-termmal ammo acid, or at both 21 and 24, is selected from the range of 500 to 40,000 Daltons. More particularly, in one embodiment the glucagon peptide segment is selected from the group consisting of SEQ ID NO: 7, SEQ ED NO: 8, and SEQ ED NO: 63, wherein the PEG chain is selected from the range of 500 to 5,000.
  • the glucagon peptide is a fusion peptide comp ⁇ sing the sequence of SEQ ID NO: 55 and SEQ ED NO: 65 wherein the peptide of SEQ ED NO: 65 is linked to the carboxy terminus of SEQ ED NO: 55.
  • an additional chemical modification of the glucagon peptide of SEQ ED NO: 10 bestows increased GLP-I receptor potency to a point where the relative activity at the glucagon and GLP-I receptors is virtually equivalent Accordingly, in one embodiment a glucagon/GLP-1 receptor co-agonist is provided wherein the terminal ammo acid of the glucagon peptides of the present invention have an amide group in place of the carboxyhc acid group that is present on the native ammo acid.
  • the relative activity of the glucagon analog at the respective glucagon and GLP-I receptors can be adjusted by further modifications to the glucagon peptide to produce analogs demonstrating about 40% to about 500% or more of the activity of native glucagon at the glucagon receptor and about 20% to about 200% or more of the activity of native GLP-I at the GLP-I receptor, e g 50- fold, 100-fold or more increase relative to the normal activity of glucagon at the GLP- 1 receptor
  • glucagon analogs that exhibit glucagon/GLP-1 receptor co-agonist activity wherein an intramolecular bridge is formed between two ammo acid side chains to stabilize the three dimensional structure of the carboxy terminus of the peptide. More particularly, the side chains of the ammo acid pairs 12 and 16, 16 and 20 , 20 and 24 oi 24 and 28 are linked to one another and thus stabilize the glucagon alpha helix. The two side chains can be linked to one another through hydrogen-bondmg, ionic interactions, such as the formation of salt b ⁇ dges, or by covalent bonds. In some embodiments, the size of the ⁇ ng or linker is about 8 atoms, or about 7-9 atoms.
  • amino acid pai ⁇ ngs that are capable of covalently bonding to form a seven-atom linking bridge include Orn-Glu (lactam ⁇ ng); Lys-Asp (lactam); or Homoser-Homoglu (lactone).
  • amino acid pai ⁇ ngs that may form an eight-atom linker include Lys-Glu (lactam); Homolys-Asp (lactam); Orn-Homoglu (lactam); 4-ammoPhe-Asp (lactam); or Tyr-Asp (lactone).
  • Further exemplary embodiments include the following pai ⁇ ngs, optionally with a lactam bridge: GIu at position 12 with Lys at position 16; native Lys at position 12 with GIu at position 16, GIu at position 16 with Lys at position 20; Lys at position 16 with GIu at position 20; GIu at position 20 with Lys at position 24; Lys at position 20 with GIu at position 24, GIu at position 24 with Lys at position 28, Lys at position 24 with GIu at position 28.
  • a glucagon analog that exhibits glucagon/GLP-1 receptor co-agonist activity wherein the analog comprises an ammo acid sequence selected ftom the group consisting of SEQ ID NO 11, 47, 48 and 49
  • the side chains are covalently bound to one anothei, and in one embodiment the two ammo acids aie bound to one another to form a lactam ⁇ ng.
  • the size of the lactam ring can vaiy depending on the length of the ammo acid side chains, and in one embodiment the lactam is formed by linking the side chains of a lysine amino acid to a glutamic acid side chain.
  • the order of the amide bond in the lactam ⁇ ng can be reveised (e.g., a lactam ⁇ ng can be formed between the side chains of a Lysl2 and a Glul ⁇ or alternatively between a GIu 12 and a Lysl ⁇ ).
  • a glucagon analog of SEQ ID NO: 45 is provided wherein at least one lactam ⁇ ng is formed between the side chains of an ammo acid pair selected from the group consisting of ammo acid pairs 12 and 16, 16 and 20 , 20 and 24 or 24 and 28.
  • a glucagon/GLP-1 receptor co-agonist wherein the co-agonist comp ⁇ ses a glucagon peptide analog of SEQ ID NO: 20 wherein the peptide comp ⁇ ses an intramolecular lactam b ⁇ dge formed between ammo acid positions 12 and 16 or between ammo acid positions 16 and 20.
  • a glucagon/GLP-1 receptor co-agonist is provided comp ⁇ smg the sequence of SEQ ID NO: 20, wherein an intramolecular lactam b ⁇ dge is formed between amino acid positions 12 and 16, between amino acid positions 16 and 20, or between ammo acid positions 20 and 24 and the amino acid at position 29 is glycine, wherein the sequence of SEQ ID NO: 29 is linked to the C-terminal ammo acid of SEQ ID NO. 20 In a further embodiment the ammo acid at position 28 is aspartic acid
  • the solubility of the glucagon peptide of SEQ BD NO- 20 can be further improved, for example, by introducing one, two, three or more charged ammo acid(s) to the C-termmal portion of glucagon peptide of SEQ ID NO: 20, preferably at a position C-terminal to position 27
  • a charged ammo acid can be introduced by substituting a native ammo acid with a charged amino acid, e.g at positions 28 or 29, or alternatively by adding a charged amino acid, e.g after position 27, 28 or 29.
  • one, two, three or all of the charged ammo acids are negatively charged.
  • solubility can also be enhanced by covalently linking hydrophihc moieties, such as polyethylene glycol, to the peptide.
  • a glucagon analog comprising the sequence of SEQ ID NO 55, wherein said analog differs from SEQ ID NO: 55 by 1 to 3 ammo acids, selected from positions 1, 2, 3, 5, 7, 10, 11, 13, 14, 17, 18, 19, 21, 24, 27, 28, and 29, wherein said glucagon peptide exhibits at least 20% of the activity of native GLP-I at the GLP-I receptor.
  • a glucagon/GLP-1 receptor co-agonist comprising the sequence: NH 2 -His-Ser-Gln-Gly-Thr-Phe- Thr-Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Xaa-Xaa-Arg- Arg-Ala-Xaa-Asp-Phe-Val-Xaa-Trp-Leu-Met-Xaa-Xaa-R (SEQ DD NO: 33) wherein the Xaa at position 15 is selected from the group of ammo acids consisting of Asp, GIu, cysteic acid, homoglutamic acid and homocysteic acid, Xaa at position 16 is selected from the group of amino acids consisting of Ser, GIu, GIn, homoglutamic acid and homocysteic acid, the Xaa at position 20 is GIn or Lys, the Xaa at position 24 is GIn or GI
  • the glucagon/GLP-1 receptor co-agonist comprises the sequence of SEQ ID NO: 33 wherein the amino acid at position 28 is aspartic acid and the amino acid at position 29 is glutamic acid.
  • the amino acid at position 28 is the native asparagme, the ammo acid at position 29 is glycine and the amino acid sequence of SEQ ED NO- 29 or SEQ ID NO: 65 is covalently linked to the carboxy terminus of SEQ ID NO: 33
  • a co-agonist comp ⁇ sing the sequence of SEQ ID NO: 33 wherein an additional acidic ammo acid added to the carboxy terminus of the peptide.
  • the carboxy terminal ammo acid of the glucagon analog has an amide in place of the carboxyhc acid group of the natural amino acid.
  • the glucagon analog comp ⁇ ses a sequence selected from the group consisting of SEQ ID NO: 40, SEQ ID NO: 41, SEQ ID NO: 42, SEQ ID NO. 43 and SEQ ID NO: 44.
  • a glucagon peptide analog of SEQ ID NO: 33 is provided, wherein said analog differs from SEQ ID NO.
  • the analog differs from SEQ ID NO: 33 by 1 to 3 ammo acids selected from positions 1, 2, 3, 21 and 27
  • the glucagon peptide analog of SEQ ID NO 33 differs from that sequence by 1 to 2 ammo acids, or in one embodiment by a single amino acid, selected form positions 1, 2, 3, 5, 7, 10, 11, 13, 14, 17, 18, 19, 21 and 27, with the proviso that when the amino acid at position 16 is serine, either position 20 is lysine, or a lactam bridge is formed between the amino acid at position 24 and either the amino acid at position 20 or position 28.
  • a relatively selective GLP-I receptor agonist comp ⁇ sing the sequence NH2-His-Ser-Xaa-Gly-Thr-Phe- Thr- Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Xaa-Xaa-Arg-Arg-Ala-Xaa-Asp-Phe-Val-Xaa-Trp- Leu-Met-Xaa-Xaa-R (SEQ ED NO: 53) wherein the Xaa at position 3 is selected from the group of amino acids consisting of GIu, Orn or NIe, the Xaa at position 15 is selected from the group of ammo acids consisting of Asp, GIu, cysteic acid, homoglutamic acid and homocysteic acid, Xaa at position 16 is selected from the group of ammo acids consisting of Ser, GIu, GIn, homoglutamic acid and homocysteic acid, the X
  • the ammo acid at position 3 is glutamic acid.
  • the acidic ammo acid substituted at position 28 and/or 29 is aspartic acid or glutamic acid.
  • the glucagon peptide, including a co-agonist peptide comp ⁇ ses the sequence of SEQ ED NO 33 further comp ⁇ sing an additional acidic ammo acid added to the carboxy terminus of the peptide.
  • the carboxy terminal ammo acid of the glucagon analog has an amide m place of the carboxyhc acid group of the natural ammo acid.
  • a glucagon/GLP-1 receptor co-agonist comprising a modified glucagon peptide selected from the group consisting of:
  • Xaa at position 15 is selected from the group of ammo acids consisting of Asp, GIu, cysteic acid, homoglutamic acid and homocysteic acid
  • Xaa at position 16 is selected from the group of ammo acids consisting of Ser, GIu, GIn, homoglutamic acid and homocysteic acid
  • the Xaa at position 20 is GIn or Lys
  • the Xaa at position 24 is GIn or GIu
  • the Xaa at position 28 is Asn, Asp or Lys
  • R is COOH or
  • CONH 2 the Xaa at position 29 is Thr or GIy
  • R is COOH, CONH 2 , SEQ ID NO: 26 or SEQ ID NO: 29, with the proviso that when position 16 is serine, position 20 is Lys, or alternatively when position 16 is serine the position 24 is GIu and either position 20 or position 28 is Lys.
  • R is CONH 2
  • the Xaa at position 15 is Asp
  • the Xaa at position 16 is selected from the group of amino acids consisting of GIu, GIn, homoglutamic acid and homocysteic acid
  • the Xaas at positions 20 and 24 are each GIn the Xaa at position 28 is Asn or Asp
  • the Xaa at position 29 is Thr.
  • the Xaas at positions 15 and 16 are each GIu
  • the Xaas at positions 20 and 24 are each GIn
  • the Xaa at position 28 is Asn or Asp
  • the Xaa at position 29 is Thr
  • R is CONH 2 .
  • glucagon peptide can be modified while retaining at least some of the activity of the parent peptide. Accordingly, applicants anticipate that one or more of the amino acids located at positions at positions 2, 5, 7, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 24, 27, 28 or 29 of the peptide of SEQ ID NO' 11 can be substituted with an ammo acid different from that present m the native glucagon peptide, and still retain activity at the glucagon receptor.
  • the methionine residue present at position 27 of the native peptide is changed to leucine or norleucine to prevent oxidative degradation of the peptide.
  • the ammo acid at position 20 is substituted with Lys, Arg, Orn or Citrullene and/or position 21 is substituted with GIu, homoglutamic acid or homocysteic acid.
  • a glucagon analog of SEQ ID NO 20 wherein 1 to 6 ammo acids, selected from positions 1, 2, 5, 7, 10, 11, 13, 14, 17, 18, 19, 21, 27, 28 or 29 of the analog differ from the corresponding ammo acid of SEQ ID NO: 1, with the proviso that when the ammo acid at position 16 is se ⁇ ne, position 20 is Lys, or alternatively when position 16 is se ⁇ ne the position 24 is GIu and either position 20 or position 28 is Lys.
  • a glucagon analog of SEQ ED NO: 20 wherein 1 to 3 ammo acids selected from positions 1, 2, 5, 7, 10, 11, 13, 14, 17, 18, 19, 20, 21, 27, 28 or 29 of the analog differ from the corresponding ammo acid of SEQ ID NO: 1
  • a glucagon analog of SEQ ID NO' 8, SEQ ID NO: 9 or SEQ ID NO: 11 is provided wherein 1 to 2 ammo acids selected from positions 1, 2, 5, 7, 10, 11, 13, 14, 17, 18, 19, 20 or 21 of the analog differ from the corresponding ammo acid of SEQ ID NO: 1, and in a further embodiment the one to two diffe ⁇ ng amino acids represent conservative ammo acid substitutions relative to the ammo acid present in the native glucagon sequence (SEQ ID NO: 1).
  • glucagon peptide of SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14 or SEQ ID NO: 15 is provided wherein the glucagon peptide further comprises one, two or three ammo acid substitutions at positions selected from positions 2, 5, 7, 10, 11, 13, 14, 17, 18, 19, 20, 21, 27 or 29. In one embodiment the substitutions at positions 2, 5, 7, 10, 11, 13, 14, 16, 17, 18, 19, 20, 21, 27 or 29 are conservative amino acid substitutions.
  • a glucagon/GLP-1 receptor co-agonist comprising a va ⁇ ant of the sequence of SEQ ED NO 33, wherein 1 to 10 amino acids selected from positions 16, 17, 18, 20, 21, 23, 24, 27, 28 and 29, respectively, of the variant differ from the corresponding amino acid of SEQ ED NO: 1.
  • a va ⁇ ant of the sequence of SEQ ID NO 33 is provided wherein the variant differs from SEQ ED NO: 33 by one or more amino acid substitutions selected from the group consisting of GIn 17, Alal8, Glu21, Ile23, Ala24, Val27 and Gly29.
  • a glucagon/GLP-1 receptor co-agonist is provided comp ⁇ smg va ⁇ ants of the sequence of SEQ ED NO 33, wherein 1 to 2 ammo acids selected from positions 17-26 of the va ⁇ ant differ from the corresponding ammo acid of SEQ ED NO: 1.
  • a variant of the sequence of SEQ ED NO 33 is provided wherein the va ⁇ ant differs from SEQ ED NO: 33 by an ammo acid substitution selected from the group consisting of Glnl7, Alal ⁇ , Glu21, Ile23 and Ala24.
  • a variant of the sequence of SEQ ID NO 33 wherein the va ⁇ ant differs from SEQ ID NO: 33 by an ammo acid substitution at position 18 wherein the substituted ammo acid is selected from the group consisting of Ala, Ser, Th 1 , Pro and GIy
  • a variant of the sequence of SEQ ID NO 33 is provided wherein the variant differs from SEQ ID NO 33 by an ammo acid substitution of Ala at position 18
  • SEQ ID NO 55 a glucagon/GLP-1 receptoi co-agonist comprising variants of the sequence of SEQ ID NO 33, wherein 1 to 2 amino acids selected from positions 17-22 of the variant differ from the corresponding ammo acid of SEQ ID NO: 1, and in a further embodiment a variant of SEQ ID NO 33 is provided wherein the variant differs from SEQ ID NO: 33 by lor 2 ammo acid substitutions at positions 20 and 21.
  • a glucagon/GLP-1 receptor co-agomst comprising the sequence: NH2-His-Ser-Gln-Gly-Thr-Phe- Thr-Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Xaa-Xaa-Arg- Arg-Ala-Xaa-Xaa-Phe-Val-Xaa-Trp-Leu-Met-Xaa-Xaa-R (SEQ E) NO: 51), wherein the
  • Xaa at position 15 is Asp, GIu, cysteic acid, homoglutamic acid or homocysteic acid
  • the Xaa at position 16 is Ser
  • the Xaa at position 20 is GIn, Lys, Arg, Orn or citrulhne
  • the Xaa at position 21 is Asp
  • the Xaa at position 24 is GIn or GIu
  • the Xaa at position 28 is Asn, Lys or an acidic ammo acid
  • the Xaa at position 29 is Thr or an acid ammo acid and R is COOH or CONH 2 .
  • R is CONH 2 .
  • a glucagon/GLP-1 receptor co-agonist is provided comp ⁇ sing a va ⁇ ant of SEQ ID NO: 11, SEQ ID NO: 12, SEQ E) NO: 13, SEQ E) NO: 14, SEQ E) NO. 15, SEQ E) NO. 47, SEQ E) NO. 48 or SEQ E) NO: 49, wherein the variant differs from said sequence by an amino acid substitution at position 20.
  • the ammo acid substitution is selected form the group consisting of Lys, Arg, Orn or citrulhne for position 20
  • a glucagon agonist is provided composing an analog peptide of SEQ E) NO: 34 wherein the analog differs from SEQ E) NO. 34 by having an amino acid other than se ⁇ ne at position 2
  • the se ⁇ ne residue is substituted with ammoisobuty ⁇ c acid or alanine, and in one embodiment the se ⁇ ne residue is substituted with aminoisobuty ⁇ c acid
  • Such modifications suppresses cleavage by dipeptidyl peptidase IV while retaining the inherent potency of the parent compound (e.g. at least 75, 80, 85, 90, 95% or more of the potentcy of the parent compound).
  • the solubility of the analog is increased, for example, by introducing one, two, three oi more charged ammo acid(s) to the C-teimmal portion of native glucagon, piefeiably at a position C-teimmal to position 27
  • one, two, three or all of the charged ammo acids are negatively charged.
  • the analog further comprises an acidic ammo acid substituted for the native ammo acid at position 28 or 29 or an acidic amino acid added to the carboxy terminus of the peptide of SEQ ED NO. 34
  • the glucagon analogs disclosed herein are further modified at position 1 or 2 to reduce susceptibility to cleavage by dipeptidyl peptidase IV
  • a glucagon analog of SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14 or SEQ ID NO: 15 is provided wherein the analog differs from the parent molecule by a substitution at position 2 and exhibits reduced susceptibility (i.e. resistance) to cleavage by dipeptidyl peptidase IV.
  • position 2 of the analog peptide is substituted with an ammo acid selected from the group consisting of d-se ⁇ ne, alanine, valine, amino n- buty ⁇ c acid, glycine, N-methyl se ⁇ ne and aminoisobuty ⁇ c acid.
  • position 2 of the analog peptide is substituted with an ammo acid selected from the group consisting of d-se ⁇ ne, alanine, glycine, N-methyl se ⁇ ne and aminoisobuty ⁇ c acid.
  • position 2 of the analog peptide is substituted with an ammo acid selected from the group consisting of d-se ⁇ ne glycine, N-methyl se ⁇ ne and ammoisobuty ⁇ c acid.
  • the glucagon peptide comprises the sequence of SEQ ID NO: 21 or SEQ ID NO: 22.
  • a glucagon analog of SEQ ID NO: 9, SEQ ID NO- 11, SEQ ID NO: 12, SEQ ID NO- 13, SEQ ID NO: 14 or SEQ ID NO: 15 wherein the analog differs from the parent molecule by a substitution at position 1 and exhibits reduced susceptibility (i.e resistance) to cleavage by dipeptidyl peptidase IV More particularly, position 1 of the analog peptide is substituted with an ammo acid selected from the group consisting of d-histidine, alpha, alpha-dimethyl imidazole acetic acid (DMIA), N-methyl histidine, alpha-methyl histidine, imidazole acetic acid, desammohistidme, hydroxyl-histidme, acetyl-histidme and homo-histidme
  • a glucagon agonist is provided comprising an analog peptide of SEQ ID NO- 34 wherein the analog differs from SEQ DD NO
  • the solubility of the analog is increased, foi example, by introducing one, two, three or more chaiged amino acid(s) to the C-teimmal portion of native glucagon, preferably at a position C- termmal to position 27
  • one, two, three oi all of the charged ammo acids are negatively chaiged
  • the analog further compiises an acidic ammo acid substituted for the native ammo acid at position 28 or 29 or an acidic amino acid added to the carboxy terminus of the peptide of SEQ ID NO 34
  • the acidic ammo acid is aspartic acid or glutamic acid
  • the glucagon/GLP-1 receptor co-agomst comp ⁇ ses a sequence of SEQ ID NO: 20 further comprising an additional carboxy terminal extension of one amino acid or a peptide selected from the group consisting of SEQ ID NO: 26, S
  • the ammo acid is typically selected from one of the 20 common ammo acids, and in one embodiment the additional carboxy terminus ammo acid has an amide group in place of the carboxylic acid of the native amino acid.
  • the additional ammo acid is selected from the group consisting of glutamic acid, aspartic acid and glycine.
  • a glucagon/GLP-1 receptor co-agonist wherein the peptide comp ⁇ ses at least one lactam ⁇ ng formed between the side chain of a glutamic acid residue and a lysine residue, wherein the glutamic acid residue and a lysine residue are separated by three amino acids.
  • the carboxy terminal ammo acid of the lactam bearing glucagon peptide has an amide group in place of the carboxylic acid of the native ammo acid
  • a glucagon and GLP-I co-agonist is provided comprising a modified glucagon peptide selected from the group consisting of:
  • Xaa at position 28 Asp, or Asn
  • the Xaa at position 29 is Thr or GIy
  • R is selected from the group consisting of COOH, CONH 2 , glutamic acid, aspartic acid, glycine, SEQ ID NO: 26, SEQ E) NO: 27 and SEQ ED NO: 28, and a lactam b ⁇ dge is formed between Lys at position 12 and GIu at position 16 for SEQ ID NO: 66, between GIu at position 16 and Lys at position 20 for SEQ ED NO: 67, between Lys at position 20 and GIu at position 24 for SEQ ED NO: 68, between GIu at position 24 and Lys at position 28 for SEQ ED NO: 69, between Lys at position 12 and GIu at position 16 and between Lys at position 20 and GIu at position 24 for SEQ ED NO: 16, between Lys at position 12 and GIu at position 16 and between GIu at position 24 and Lys at position 28 for SEQ
  • R is selected from the group consisting of COOH, CONH 2 , glutamic acid, aspartic acid, glycine, the amino acid at position 28 is Asn, and the amino acid at position 29 is threonine.
  • R is CONH 2
  • the ammo acid at position 28 is Asn
  • the amino acid at position 29 is threonine.
  • R is selected from the group consisting of SEQ ED NO.
  • the glucagon/GLP-1 receptor co-agonist is selected from the group consisting of SEQ ID NO: 11, SEQ ED NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO- 17 and SEQ ID NO: 18, wherein the peptide further comp ⁇ ses an additional carboxy terminal extension of one ammo acid or a peptide selected from the group consisting of SEQ ID NO: 26, SEQ ID NO: 27 and SEQ ED NO.
  • the terminal extension comp ⁇ ses the sequence of SEQ ED NO- 26, SEQ ID NO: 29 or SEQ ID NO 65 and the glucagon peptide comp ⁇ ses the sequence of SEQ ED NO: 55.
  • the glucagon/GLP-1 receptor co-agonist comprises the sequence of SEQ BD NO: 33 wherein the ammo acid at position 16 is glutamic acid, the amino acid at position 20 is lysine, the ammo acid at position 28 is asparagme and the ammo acid sequence of SEQ E) No: 26 or SEQ ID NO: 29 is linked to the carboxy terminus of SEQ ID NO: 33.
  • the ammo acid is typically selected from one of the 20 common ammo acids, and in one embodiment the ammo acid has an amide group in place of the carboxylic acid of the native ammo acid.
  • the additional amino acid is selected from the group consisting of glutamic acid and aspartic acid and glycine.
  • the carboxy terminal amino acid of the extension in one embodiment, ends m an amide group or an ester group rather than a carboxylic acid.
  • the glucagon/GLP-1 receptor co-agonist comprises the sequence: NHrHis-Ser-Gln-Gly-Thr-Phe- Thr-Ser-Asp-Tyr-Ser-Lys-Tyr-Leu-Asp- Glu-Arg-Arg-Ala-Gln-Asp-Phe-Val-Gln-T ⁇ -Leu-Met-Asn-Thr-Xaa-CONH 2 (SEQ ED NO: 19), wherein the Xaa at position 30 represents any amino acid.
  • Xaa is selected from one of the 20 common amino acids, and in one embodiment the amino acid is glutamic acid, aspartic acid or glycine.
  • the solubility of this peptide can be further improved by covalently linking a PEG chain to the side chain of amino acid at position 17, 21, 24 or 30 of SEQ ID NO: 19.
  • the peptide comp ⁇ ses an additional carboxy terminal extension of a peptide selected from the group consisting of SEQ ID NO: 26, SEQ ID NO: 27 and SEQ ID NO: 28.
  • the glucagon/GLP-1 receptor co-agonist comp ⁇ ses the sequence of SEQ ID NO: 30, SEQ ID NO: 31 and SEQ ID NO: 32.
  • SEQ ID NO: 11 SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18, SEQ ID NO: 19 and SEQ ID NO: 64 can be made to yield a set of glucagon agonists that possess va ⁇ able degrees of GLP-I agonism Accordingly, peptides that possess virtually identical in vitro potency at each receptor have been prepared and characte ⁇ zed. Similarly, peptides with tenfold selectively enhanced potency at each of the two receptors have been identified and characterized.
  • the solubility of the glucagon/GLP-1 co-agonist peptides can be further enhanced in aqueous solutions at physiological pH, while retaining the high biological activity relative to native glucagon by the introduction of hydrophilic groups at positions 16, 17, 21, and 24 of the peptide, or by the addition of a single modified amino acid (i.e an amino acid modified to compose a hydrophilic group) at the carboxy terminus of the glucagon/GLP-1 co-agonist peptide.
  • the hydrophilic group comprises a polyethylene (PEG) chain.
  • the glucagon peptide composes the sequence of SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17 or SEQ ID NO: 18 wherein a PEG chain is covalently linked to the side chain of an ammo acids at position 16, 17, 21, 24, 29 or the C-termmal amino acid of the glucagon peptide, with the proviso that when the peptide comprises SEQ ID NO: 10, SEQ ED NO: 11, SEQ ED NO: 12 or SEQ ID NO: 13 the polyethylene glycol chain is covalently bound to an ammo acid residue at position 17, 21 or 24, when the peptide composes SEQ ID NO: 14 or SEQ ID NO: 15 the polyethylene glycol chain is covalently bound to an amino acid residue at position 16, 17 or 21, and when the peptide comprises SEQ ID NO: 16, SEQ ED NO: 17 or SEQ ID NO 18 the polyethylene
  • the glucagon peptide comprises the sequence of SEQ ID NO: 11, SEQ ED NO" 12 or SEQ ED NO. 13, wherein a PEG chain is covalently linked to the side chain of an ammo acids at position 17, 21, 24, or the C-termmal amino acid of the glucagon peptide, and the carboxy terminal ammo acid of the peptide has an amide group in place of the carboxyhc acid group of the native amino acid.
  • the glucagon/GLP-1 receptor co-agonist peptide composes a sequence selected from the group consisting of SEQ ID NO 12, SEQ ID NO" 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ED NO: 16, SEQ K) NO: 17, SEQ ID NO: 18 and SEQ K) NO: 19, wherein a PEG chain is covalently linked to the side chain of an ammo acid at position 17, 21 or 24 of SEQ ID NO: 12, SEQ ID NO- 13 and SEQ DD NO: 19, or at position 16, 17 or 21 of SEQ K) NO 14 and SEQ K) NO: 15 or at position 17 or 21 of SEQ ID NO: 16, SEQ K) NO: 17 and SEQ ID NO: 18 of the glucagon peptide.
  • the glucagon/GLP-1 receptor co-agonist peptide comprises the sequence of SEQ K) NO: 11 or SEQ ID NO: 19, wherein a PEG chain is covalently linked to the side chain of an ammo acids at position 17, 21 or 24 or the C-terminal ammo acid of the glucagon peptide.
  • the glucagon co-agonist peptide is modified to contain one or more ammo acid substitution at positions 16, 17, 21, 24, or 29 or the C- termmal ammo acid, wherein the native ammo acid is substituted with an amino acid having a side chain suitable for crosslinkmg with hydrophilic moieties, including for example, PEG.
  • the native peptide can be substituted with a naturally occurring ammo acid or a synthetic (non-naturally occurring) ammo acid.
  • Synthetic or non- naturally occurring ammo acids refer to ammo acids that do not naturally occur in vivo but which, nevertheless, can be incorporated into the peptide structures desc ⁇ bed herein.
  • the amino acid having a side chain suitable for crosslinkmg with hydrophilic moieties can be added to the carboxy terminus of any of the glucagon analogs disclosed herein.
  • an ammo acid substitution is made in the glucagon/GLP-1 receptor co- agonist peptide at a position selected from the group consisting of 16, 17, 21, 24, or 29 replacing the native ammo acid with an ammo acid selected from the group consisting of lysine, cysteine, ornithine, homocysteine and acetyl phenylalanine, wherein the substituting ammo acid further comprises a PEG chain covalently bound to the side chain of the ammo acid
  • a glucagon peptide selected form the group consisting of SEQ K) NO: 12, SEQ ID NO: 13, SEQ K) NO: 14, SEQ K) NO: 15, SEQ K) NO: 16, SEQ K) NO: 17, SEQ ID NO: 18, and SEQ K amino acid having a side chain suitable for crosslinkmg
  • the pegylated glucagon/GLP-1 receptor co-agonist further comprises the sequence of SEQ K) NO: 26, SEQ ID NO: 27 or SEQ K) NO: 29.
  • the glucagon peptide comp ⁇ ses the sequence of SEQ ID NO: 55 or SEQ ID NO: 56, further comprising a C-termmal extension of SEQ ID NO.
  • SEQ ID NO: 29 or SEQ ID NO: 65 linked to the C-termmal ammo acid of SEQ ED NO- 55 or SEQ ID NO: 56, and optionally further comprising a PEG chain covalently linked to the side chain of an ammo acids at position 17, 18, 21, 24 or 29 or the C-termmal amino acid of the peptide
  • the glucagon peptide comp ⁇ ses the sequence of SEQ ID NO: 55 or SEQ ID NO: 56, wherein a PEG chain is covalently linked to the side chain of an ammo acids at position 21 or 24 of the glucagon peptide and the peptide further comprises a C-terminal extension of SEQ ID NO: 26, or SEQ ID NO: 29.
  • the glucagon peptide comprises the sequence of SEQ E) NO: 55, or SEQ ID NO: 33 or SEQ ID NO: 34, wherein an additional amino acid is added to the carboxy terminus of SEQ ID NO: 33 or SEQ ID NO: 34, and a PEG chain is covalently linked to the side chain of the added amino acid.
  • the pegylated glucagon analog further comp ⁇ ses a C-termmal extension of SEQ ID NO: 26 or SEQ ED NO: 29 linked to the C-termmal amino acid of SEQ ED NO: 33 or SEQ ED NO: 34.
  • the glucagon peptide comp ⁇ ses the sequence of SEQ ID NO: 19, wherein a PEG chain is covalently linked to the side chain of the amino acid at position 30 of the glucagon peptide and the peptide further comp ⁇ ses a C-terminal extension of SEQ ED NO: 26 or SEQ ED NO: 29 linked to the C-termmal ammo acid of SEQ ED NO: 19.
  • the polyethylene glycol chain may be in the form of a straight chain or it may be branched. In accordance with one embodiment the polyethylene glycol chain has an average molecular weight selected from the range of about 500 to about 10,000 Daltons. In one embodiment the polyethylene glycol chain has an average molecular weight selected from the range of about 1,000 to about 5,000 Daltons. In an alternative embodiment the polyethylene glycol chain has an average molecular weight selected from the range of about 10,000 to about 20,000 Daltons. In accordance with one embodiment the pegylated glucagon peptide comprises two or more polyethylene chains covalently bound to the glucagon peptide wherein the total molecular weight of the glucagon chains is about 1,000 to about 5,000 Daltons.
  • the pegylated glucagon agonist comp ⁇ ses a peptide consisting of SEQ ID NO: 5 or a glucagon agonist analog of SEQ ID NO: 5, wherein a PEG chain is covalently linked to the ammo acid residue at position 21 and at position 24, and wherein the combined molecular weight of the two PEG chains is about 1,000 to about 5,000 Daltons
  • the glucagon agonists of the piesent invention have enhanced biophysical stability and aqueous solubility while demonstiating enhanced bioactivity relative to the native peptide Accordingly, the glucagon agonists of the present invention are believed to be suitable for any use that has previously been desc ⁇ bed for the native glucagon peptide. Accordingly, the modified glucagon peptides desc ⁇ bed herein can be used to treat hypoglycemia or to increase blood glucose level, to induce temporary paralysis of the gut for radiological uses, or treat other metabolic diseases that result from low blood levels of glucagon.
  • the glucagon peptides desc ⁇ bed herein also are expected to be used to reduce or maintain body weight, or to treat hyperglycemia, or to reduce blood glucose level, or to normalize blood glucose level.
  • the glucagon peptides of the invention may be administered alone or in combination with other anti-diabetic or anti-obesity agents.
  • Anti-diabetic agents known in the art or under investigation include insulin, sulfonylureas, such as tolbutamide (O ⁇ nase), acetohexamide (Dymelor), tolazamide (Tolmase), chlorpropamide (Diabinese), glipizide (Glucotrol), glybu ⁇ de (Diabeta, Micronase, Glynase), ghmepi ⁇ de (Amaryl), or ghclazide (Diamicron); meghtmides, such as repaglimde (Prandin) or nateglmide (Starlix); biguanides such as metformin (Glucophage) or phenformin; thiazohdinediones such as rosightazone (Avandia), pioghtazone (Actos), or troghtazone (Rezulm), or other PPAR ⁇ inhibitors; alpha glucosidase
  • Anti-obesity agents known in the art or under investigation include appetite suppressants, including phenethylamme type stimulants, phentermme (optionally with fenfluramine or dexfenfluramine), diethylpropion (Tenuate®), phendimetrazine (Prelu-2®, Bont ⁇ l®), benzphetamme (Didrex®), sibutrarmne (Me ⁇ dia®, Reductil®), ⁇ monabant (Acompha®), other cannabmoid receptor antagonists, oxyntomodulm, fluoxetine hydrochloride (Prozac); Qnexa (topiramate and phentermme), Excaha (bupropion and zomsamide) or Contrave (bupropion and naltrexone); or lipase inhibitors, similai to xenical (Orhstat) oi Cetihstat (also known as ATL-962), or GT 389-255
  • the pegylated glucagon agonist comp ⁇ ses a peptide selected from the group consisting of SEQ ID NO: 23, SEQ ID NO: 24, and SEQ ID NO: 25, and glucagon agonist analogs of SEQ ID NO 23, SEQ ID NO: 24, and SEQ ID NO: 25, or a pegylated lactam derivative of glucagon comprising the sequence of SEQ ID NO: 20, wherein the side chain of an amino acid residue of said glucagon peptide is covalently bound to the polyethylene glycol chain.
  • the method of treating hypoglycemia in accordance with the present invention comp ⁇ ses the steps of administering the presently disclosed glucagon agonists to a patient using any standard route of administration, including parenterally, such as intravenously, intraperitoneally, subcutaneously or intramuscularly, mtrathecally, transdermally, rectally, orally, nasally or by inhalation.
  • parenterally such as intravenously, intraperitoneally, subcutaneously or intramuscularly, mtrathecally, transdermally, rectally, orally, nasally or by inhalation.
  • the composition is administered subcutaneously or intramuscularly
  • the composition is administered parenterally and the glucagon composition is prepackaged in a syringe
  • pegylated glucagon peptides can be prepared that retain the parent peptide's bioactivity and specificity
  • a glucagon peptide of SEQ ID NO 23, SEQ DD NO 24, and SEQ ID NO: 25, or a glucagon agonist analog thereof, or a pegylated lactam derivative of glucagon comprising the sequence of SEQ ID NO: 20 wherein the peptide comp ⁇ ses one or more polyethylene glycol chains, wherein the total molecular weight of the linked PEG is greater than 5,000 Daltons, and in one embodiment is greater than 10,000 Daltons, but less than 40,000 Daltons
  • modified glucagon peptides have a delayed or prolonged time of activity but without loss of the bioactivity Accoidmgly, such compounds can be administered to extend the effect of the administered glucagon peptide.
  • Glucagon peptides that have been modified to be covalently bound to a PEG chain having a molecular weight of greater than 10,000 Daltons can be administered in conjunction with msuhn to buffer the actions of insulin and help to maintain stable blood glucose levels in diabetics.
  • the modified glucagon peptides of the present disclosure can be co-admimstered with msuhn as a single composition, simultaneously administered as separate solutions, or alternatively, the insulin and the modified glucagon peptide can be administered at different time relative to one another.
  • the composition composing msuhn and the composition comprising the modified glucagon peptide are administered withm 12 hours of one another.
  • a composition comp ⁇ sing msuhn and a modified glucagon peptide selected from the group consisting of SEQ ED NO: 2, SEQ ID NO: 3, SEQ ID NO" 4, SEQ ID NO: 5 and glucagon agonist analogs thereof, wherein the modified glucagon peptide further comp ⁇ ses a polyethylene glycol chain covalently bound to an amino acid side chain at position 17, 21, 24 or 21 and 24.
  • the composition is an aqueous solution comp ⁇ sing msuhn and the glucagon analog
  • the glucagon peptide comprises the sequence of SEQ ID NO- 24 or SEQ ID NO: 25
  • the PEG chain is covalently bound at position 21 or 24 of the glucagon peptide.
  • the polyethylene glycol chain has a molecular weight of about 10,000 to about 40,000.
  • the modified glucagon peptides disclosed herein are used to induce temporary paralysis of the intestinal tract.
  • This method has utility for radiological purposes and comp ⁇ ses the step of administering an effective amount of a pharmaceutical composition comprising a pegylated glucagon peptide, a glucagon peptide comprising a c-terminal extension or a dimer of such peptides.
  • the glucagon peptide comprises a sequence selected from the group consisting of SEQ ID NO 2, SEQ ID NO: 3, SEQ ID NO 4, SEQ ID NO" 5, SEQ ID NO: 6, SEQ ID NO" 7, SEQ ID NO: 8, SEQ ID NO 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO- 12, SEQ ID NO: 13 SEQ ID NO 14 and SEQ ID NO: 15.
  • the glucagon peptide further comp ⁇ ses a PEG chain, of about 1,000 to 40,000 Daltons is covalently bound to an ammo acid residue at position 21 or 24
  • the glucagon peptide is selected from the group consisting of SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14 and SEQ ID NO: 15.
  • the PEG chain has a molecular weight of about 500 to about 5,000 Daltons.
  • the composition used to induce temporary paralysis of the intestinal tract comp ⁇ ses a first modified glucagon peptide and a second modified glucagon peptide.
  • the first modified peptide comp ⁇ ses a sequence selected from the group consisting of SEQ ID NO: 23, SEQ ID NO: 24 and SEQ ID NO: 25, optionally linked to a PEG chain of about 500 to about 5,000 Daltons
  • the second peptide comp ⁇ ses a sequence selected from the group consisting of SEQ ID NO: 23, SEQ ID NO: 24 and SEQ ID NO: 25, covalently linked to a PEG chain of about 10,000 to about 40,000 Daltons.
  • the PEG chain of each peptide is covalently bound to an ammo acid residue at either position 17, 21 or 24 of the respective peptide, and independent of one another.
  • Oxyntomodulm a naturally occurring digestive hormone found in the small intestine, has been reported to cause weight loss when administered to rats or humans (see Diabetes 2005;54:2390-2395).
  • Oxyntomodulm is a 37 ammo acid peptide that contains the 29 amino acid sequence of glucagon (i e SEQ ID NO: 1) followed by an 8 ammo acid carboxy terminal extension of SEQ ID NO 27 (KRNRNNIA) Accordingly, applicants believe that the bioactivity of oxyntomodulm can be retained (i.e.
  • the present invention also encompasses the modified glucagon peptides of the present invention that have a carboxy terminal extension of SEQ ID NO: 27 (KRNRNNIA) or SEQ ED NO 28.
  • KRNRNNIA carboxy terminal extension of SEQ ID NO: 27
  • SEQ ED NO 28 SEQ ED NO 28
  • These compounds can be administered to individuals to induce weight loss or prevent weight gain.
  • a glucagon agonist analog of SEQ ID NO: 33 or SEQ ID NO: 20 further comp ⁇ sing the amino acid sequence of SEQ ID NO: 27 (KRNRNNIA) or SEQ ID NO: 28 linked to ammo acid 29 of the glucagon peptide, is administered to individuals to induce weight loss or prevent weight gam.
  • the glucagon peptide comprises a sequence selected from the group consisting of SEQ ED NO: 10, SEQ ID NO: 12, SEQ ID NO: 13 SEQ ID NO: 14 and SEQ ID NO: 15, further comp ⁇ sing the ammo acid sequence of SEQ ED NO: 27 (KRNRNNIA) or SEQ ED NO: 28 linked to ammo acid 29 of the glucagon peptide.
  • Exendm-4 is a peptide made up of 39 amino acids. It is a powerful stimulator of a receptor known as GLP-I. This peptide has also been reported to suppress appetite and induce weight loss. Applicants have found that the terminal sequence of Exendin-4 when added at the carboxy terminus of glucagon improves the solubility and stability of glucagon without compromising the bioactivity of glucagon. In one embodiment the terminal ten ammo acids of Exendin-4 (i.e. the sequence of SEQ ED NO: 26 (GPSSGAPPPS)) are linked to the carboxy terminus of a glucagon peptide of the present disclosure. These fusion proteins are anticipated to have pharmacological activity for suppressing appetite and inducing weight loss/weight maintenance.
  • a glucagon agonist analog of SEQ ED NO: 33 or SEQ ED NO: 20, further comprising the ammo acid sequence of SEQ ID NO: 26 (GPSSGAPPPS) or SEQ ID NO: 29 linked to ammo acid 29 of the glucagon peptide is administered to individuals to induce weight loss or prevent weight gam.
  • the glucagon peptide comprises a sequence selected from the group consisting of SEQ ED NO: 10, SEQ ED NO: 12, SEQ ED NO: 13 SEQ ED NO: 14,
  • SEQ ED NO: 15 SEQ ED NO: 16, SEQ ID NO: 17, SEQ ED NO: 18, SEQ ID NO: 66, SEQ ED NO: 67, SEQ ID NO: 68, SEQ ED NO: 69, SEQ ED NO: 55 and SEQ ED NO: 56 further comp ⁇ sing the ammo acid sequence of SEQ ED NO: 26 (GPSSGAPPPS) or SEQ ED NO' 29 linked to ammo acid 29 of the glucagon peptide.
  • the administered glucagon peptide analog comprises the sequence of SEQ ID NO: 64.
  • the present disclosure also encompasses multimers of the modified glucagon peptides disclosed herein
  • Two oi more of the modified glucagon peptides can be linked together using standard linking agents and procedures known to those skilled m the art.
  • dimers can be formed between two modified glucagon peptides through the use of bifunctional thiol crosslmkers and bi-functional amine crosslinkers, particularly for the glucagon peptides that have been substituted with cysteine, lysine ornithine, homocysteine or acetyl phenylalanine residues (e.g. SEQ ID NO: 3 and SEQ ID NO: 4).
  • the dimer can be a homodimer or alternatively can be a heterodimer.
  • the dimer comprises a homodimer of a glucagon fusion peptide wherein the glucagon peptide portion comp ⁇ ses SEQ ID NO: 11 or SEQ ID NO: 20 and an ammo acid sequence of SEQ ID NO: 26 (GPSSGAPPPS), SEQ ID NO: 27 (KRNRNNIA) or SEQ ID NO: 28 (KRNR) linked to ammo acid 29 of the glucagon peptide.
  • the dimer comprises a homodimer of a glucagon agonist analog of SEQ ID NO: 11, wherein the glucagon peptide further comp ⁇ ses a polyethylene glycol chain covalently bound to position 21 or 24 of the glucagon peptide.
  • a dimer comprising a first glucagon peptide bound to a second glucagon peptide via a linker, wherein the first glucagon peptide comp ⁇ ses a peptide selected from the group consisting of SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10 and SEQ ID NO: 11 and the second glucagon peptide comp ⁇ ses SEQ ID NO: 20.
  • a dimer comp ⁇ smg a first glucagon peptide bound to a second glucagon peptide via a linker, wherein said first glucagon peptide comprises a sequence selected from the group consisting of SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, SEQ ED NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11 and the second glucagon peptide comprise SEQ ID NO: 11, and pharmaceutically acceptable salts of said glucagon polypeptides.
  • a dimer comp ⁇ smg a first glucagon peptide bound to a second glucagon peptide via a linker, wherein said first glucagon peptide is selected from the group consisting of SEQ ID NO.
  • the second glucagon peptide is independently selected from the group consisting of SEQ DD NO: 11, SEQ ID NO: 12, SEQ ID NO: 13 SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17 and SEQ ID NO: 18 and the second glucagon peptide is independently selected from the group consisting of SEQ DD NO: 11, SEQ ID NO: 12, SEQ ID NO: 13 SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO- 17 and SEQ ID NO: 18, and pharmaceutically acceptable salts of said glucagon polypeptides
  • the first glucagon peptide is selected from the group consisting of SEQ ID NO: 20 and the second glucagon peptide is independently selected from the group consisting of SEQ ID NO: 8, SEQ ID NO: 9 and SEQ ID NO: 11.
  • the dimer is formed between two peptides wherein each peptide comprises the ammo acid sequence of SEQ ID NO: 11.
  • the modified glucagon peptides of the present invention can be provided in accordance with one embodiment as part of a kit.
  • a kit for administering a glucagon agonist to a patient in need thereof is provided wherein the kit composes a modified glucagon peptide selected from the group consisting of 1) a glucagon peptide composing the sequence of SEQ ID NO: 20, SEQ ID NO: 9, SEQ ID NO: 10 or SEQ DD NO: 11; 2) a glucagon fusion peptide composing a glucagon agonist analog of SEQ ID NO: 11 , SEQ DD NO: 20 or SEQ ID NO: 55, and an amino acid sequence of SEQ DD NO: 26 (GPSSGAPPPS), SEQ DD NO: 27 (KRNRNNIA) or SEQ DD NO: 28 (KRNR) linked to ammo acid 29 of the glucagon peptide; and 3) a pegylated glucagon peptide of SEQ DD NO:
  • the kit compose a glucagon/GLP-1 co-agomst wherein the peptide composes a sequence selected from the group consisting of SEQ DD NO: 11, SEQ DD NO: 12, SEQ DD NO: 13 SEQ DD NO: 14, SEQ DD NO: 15, SEQ DD NO: 16, SEQ DD NO: 17 and SEQ DD NO: 18.
  • the kit is provided with a device for administering the glucagon composition to a patient, e.g. syonge needle, pen device, jet injector or other needle-free injector.
  • the kit may alternatively or in addition include one or more containers, e.g , vials, tubes, bottles, single or multi-chambered pre -filled syringes, cartridges, infusion pumps (external or implantable), jet injectors, pre-filled pen devices and the like, optionally containing the glucagon peptide in a lyophihzed form or in an aqueous solution.
  • the kits will also include instructions for use.
  • the device of the kit is an aerosol dispensing device, wherein the composition is prepackaged within the aerosol device
  • the kit comp ⁇ ses a syringe and a needle, and m one embodiment the sterile glucagon composition is prepackaged within the syringe
  • the compounds of this invention may be prepared by standaid synthetic methods, recombinant DNA techniques, or any other methods of prepa ⁇ ng peptides and fusion proteins. Although certain non-natural ammo acids cannot be expressed by standard recombinant DNA techniques, techniques for their preparation are known in the art. Compounds of this invention that encompass non-peptide portions may be synthesized by standard organic chemistry reactions, in addition to standard peptide chemistry reactions when applicable.
  • Glucagon analogs were synthesized using HBTU-activated "Fast Boc" single coupling starting from 0.2mmole of Boc Thr(OBzl)Pam resin on a modified Applied Biosystem 430 A peptide synthesizer. Boc amino acids and HBTU were obtained from Midwest Biotech (Fishers, IN). Side chain protecting groups used were: Arg(Tos), Asn(Xan), Asp(OcHex), Cys(pMeBzl), His(Bom), Lys(2Cl-Z), Ser(OBzl), Thr(OBzl), Tyr(2Br-Z), and Trp(CHO). The side-chain protecting group on the N- terminal His was Boc.
  • Each completed peptidyl resin was treated with a solution of 20% piperdine m dimethylformamide to remove the formyl group from the tryptophan.
  • Liquid hydrogen fluoride cleavages were performed in the presence of p-cresol and dimethyl sulfide. The cleavage was run for 1 hour in an ice bath using an HF apparatus
  • HSQGTFTSDYSKYLDSCRAQDFVQWLMNT (SEQ ID NO: 35)
  • the following side chain protecting groups were used: Arg(Tos), Asp(OcHex), Asn(Xan), Cys(pMeBzl), Glu(OcHex), His(Boc), Lys(2Cl-Z), Ser(Bzl), Thr(Bzl), Trp(CHO), and Tyr(Br-Z).
  • the completed peptidyl resm was treated with 20% pipe ⁇ dine/dimethylformamide to remove the Trp formyl protection then transferred to an HF reaction vessel and dried in vacuo.
  • 1.0ml p-cresol and 0.5 ml dimehyl sulfide were added along with a magnetic stir bar.
  • the vessel was attached to the HF apparatus (Pennisula Labs), cooled in a dry lce/methanol bath, evacuated, and aprox 10ml liquid hydrogen fluoride was condensed in.
  • the reaction was stirred in an ice bath for lhr then the HF was removed in vacuo.
  • the following side chain protecting groups were used: Arg(Tos), Asp(OcHex), Asn(Xan), Cys(pMeBzl), Glu(OcHex), His(Boc), Lys(2Cl-Z), Ser(Bzl), Thr(Bzl), Trp(CHO), and Tyr(Br-Z).
  • the completed peptidyl resm was treated with 20% pipe ⁇ dine/dimethylformamide to remove the Trp formyl protection then transferred to HF reaction vessel and dried m vacuo. 1.0ml p-cresol and 0.5 ml dimehyl sulfide were added along with a magnetic stir bar.
  • the vessel was attached to the HF apparatus (Pennisula Labs), cooled in a dry lce/methanol bath, evacuated, and aprox. 10ml liquid hydrogen fluoride was condensed in.
  • the reaction was stirred in an ice bath for lhr then the HF was removed m vacuo.
  • the residue was suspended in ethyl ether; the solids were filtered, washed with ether, and the peptide extracted into 50 ml aqueous acetic acid.
  • Glucagon Cys 17 (l-29) and 27.3mg methoxy poly(ethyleneglycol) maleimide avg. M.W.5000 (mPEG-Mal-5000,Nektar Therapeutics) were dissolved in 3.5ml phosphate buffered salme (PBS) and 0.5ml 0.01M ethylenediamine tetraacetic acid (EDTA) was added.
  • PBS phosphate buffered salme
  • EDTA ethylenediamine tetraacetic acid
  • the fractions corresponding to product were combined, frozen and lyophilized to give 45.8mg.
  • MALDI mass spectral analysis showed a typical PEG broad signal with a maximum at 9175.2 which is approximately 5,000 a.m.u. more than Glucagon C 24 (3457.8).
  • a buffer 0.1 %TFA
  • B buffer 0.1%TFA/50%ACN
  • flow 4ml/min
  • 5 min fractions were collected while monitoring the UV at 214nm (2.0A).
  • the fractions containing homogeneous product were combined, frozen and lyophilized to give 25.7 mg.
  • Purity as determined by analytical HPLC was ⁇ 90%.
  • a MALDI mass spectral analysis showed a broad peak from 23,000 to 27,000 which is approximately 20,000 a.m.u. more than starting Glucagon C 24 (3457.8).
  • Glucagon Cys 29 Mal-PEG-5K 20.0mg of Glucagon Cys 29 ( 1 -29) and 24.7 mg mPEG-Mal-5000 (Nektar
  • Glucagon Cys 24 (l-29) was added 4ml 0.05M ammonium bicarbonate/50%acetonitrile and 5.5 ul of a solution of 2-bromo-4-hydroxybutyric acid- ⁇ -lactone (10OuI in 900ul acetonitrile). After 3hrs of stirring at room temperature, another 105 ul of lactone solution was added to the reaction mixture which was stirred another 15hrs. The reaction mixture was diluted to 10ml with 10% aqueous acetic acid and was loaded onto a 2.2 x 25 cm Kromasil Cl 8 preparative reverse phase column.
  • Lys(Cl-Z) was used at position 12 if lactams were constructed from 16- 20, 20-24, or 24-28.
  • the completed peptidyl resin was treated with 20% piperidine/dimethylformamide for one hour with rotation to remove the Trp formyl group as well as the Fmoc and OFm protection from Lysl2 and Glul6.
  • the resin was washed with dimethylformamide, followed by dichloromethane and than again with dimethylformamide.
  • the resin was treated with 520 mg (1 mmole) Benzotriazole-1- yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate (PyBOP) in dimethylformamide and diisopropylethylamine (DIEA). The reaction proceeded for 8-10 hours and the cyclization was confirmed by a negative ninhydrin reaction.
  • the resin was washed with dimethylformamide, followed by dichloromethane and subsequently treated with trifluoroacetic acid for 10 minutes. The removal of the Boc group was confirmed by a positive ninhydrin reaction.
  • the resin was washed with dimethylformamide and dichloromethane and dried before being transferred to a hydrofluoric acid (HF) reaction vessel.
  • HF hydrofluoric acid
  • 500 ⁇ L p-cresol was added along with a magnetic stir bar.
  • the vessel was attached to the HF apparatus (Peninsula Labs), cooled in a dry ice/methanol bath, evacuated, and approximately 10 mL of liquid hydrofluoric acid was condensed into the vessel.
  • the reaction was stirred for 1 hour in an ice bath and the HF was subsequently removed in vacuo.
  • the residue was suspended in ethyl ether; the solids were filtered, washed with ether, and the peptide was solubilized with 150 mL 20% acetonitrile/1% acetic acid.
  • HPLC analysis of the purified peptide demonstrated greater than 95% purity and electrospray ionization mass spectral analysis confirmed a mass of 3506 Da for the 12-16 lactam. Lactams from 16-20, 20-24, and 24-28 were prepared similarly.
  • a solution (lmg/ml or 3mg/ml) of glucagon (or an analog) is prepared in 0.01N HCl.
  • lOOul of stock solution is diluted to ImI with 0.01N HCl and the UV absorbance (276nm) is determined.
  • the pH of the remaining stock solution is adjusted to pH7 using
  • the affinity of peptides to the glucagon receptor was measured in a competition binding assay utilizing scintillation proximity assay technology.
  • Serial 3- fold dilutions of the peptides made in scintillation proximity assay buffer (0.05 M Tris-HCl, pH 7.5, 0.15 M NaCl, 0.1% w/v bovine serum albumin) were mixed in 96 well white/clear bottom plate (Corning Inc., Acton, MA) with 0.05 nM (3-[ 125 I]- iodotyrosyl) TyrlO glucagon (Amersham Biosciences, Piscataway, NJ), 1-6 micrograms per well, plasma membrane fragments prepared from cells over- expressing human glucagon receptor, and 1 mg/well polyethyleneimine-treated wheat germ agglutinin type A scintillation proximity assay beads (Amersham Biosciences, Piscataway, NJ).
  • % Specific Binding ((Bound-NSB)/(Total bound- NSB)) X 100. IC 50 values were determined by using Origin software (OriginLab, Northampton, MA). - -
  • glucagon analogs to induce cAMP was measured in a firefly luciferase-based reporter assay.
  • HEK293 cells co-transfected with either glucagon- or GLP-I receptor and luciferase gene linked to cAMP responsive element were serum deprived by culturing 16h in DMEM (Invitrogen, Carlsbad, CA) supplemented with 0.25% Bovine Growth Serum (HyClone, Logan, UT) and then incubated with serial dilutions of either glucagon, GLP-I or novel glucagon analogs for 5 h at 37 0 C, 5% CO 2 in 96 well poly-D-Lysine-coated "Biocoat” plates (BD Biosciences, San Jose, CA).
  • glucagon analog was dissolved in water or PBS and an initial HPLC analysis was conducted. After adjusting the pH ( 4, 5, 6, 7), the samples were incubated over a specified time period at 37 0 C and re-analyzed by HPLC to determine the integrity of the peptide. The concentration of the specific peptide of interest was determined and the percent remaining intact was calculated relative to the initial analysis. Results for Glucagon Cys 21 -maleimidoPEG 5K are shown in Figs. 1 and 2.
  • EXAMPLE 16 The following glucagon peptides are constructed generally as described above in Examples 1-11:
  • HX2QGT FTSDY SKYLD ERRAQ DFVQW LMNTa (SEQ ID NO: 104) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (SEQ ID NO: 105) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 106) HX2QGT FTSDY SKYLD ERRAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 107) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 108) HX2QGT FTSDY SKYLD KRRAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 109) HX2QGT FTSDY SKYLD ERAAK DFVQW LMNTa (SEQ ID NO: 110) HX
  • HX2QGT FTSDY SKYLD ERRAQ DFVQW LMNTa (SEQ ID NO: 121) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (SEQ ID NO: 122) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 123) HX2QGT FTSDY SKYLD ERRAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 124) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 12-16; SEQ ED NO: 125) HX2QGT FTSDY SKYLD KRRAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 126) HX2QGT FTSDY SKYLD ERAAK DFVQW LMNTa (SEQ ID NO: 127)
  • HSEGT FTSDY SKYLD ERRAQ DFVQW LMNTa (SEQ ID NO: 138) HSEGT FTSDY SKYLD ERRAK DFVQW LMNTa (SEQ ID NO: 139) HSEGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 140) HSEGT FTSDY SKYLD ERRAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 141)
  • HSEGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 142)
  • HSEGT FTSDY SKYLD KRRAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 143)
  • HSEGT FTSDY SKYLD ERAAK DFVQW LMNTa (SEQ ID NO: 144)
  • HSEGT FTSDY SKYLD ERAAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 145)
  • HSEGT FTSDY SKYLD ERAAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 146)
  • HSEGT FTSDY SKYLD ERAAK DFVQW LMNTa (lactam @ 12-16; SEQ ID NO:
  • HSEGT FTSDY SKYLD KRAAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO:
  • HSEGT FTSDY SKYLD EQAAK EFIAW LMNTa (SEQ ID NO: 149)
  • HSEGT FTSDY SKYLD EQAAK EFIAW LMNTa (lactam @ 12-16; SEQ ID NO:
  • HSEGT FTSDY SKYLD EQAAK EHAW LMNTa (lactam @ 16-20; SEQ ID NO:
  • HSEGT FTSDY SKYLD EQAAK EFIAW LVKGa (SEQ ID NO: 152)
  • HSEGT FTSDY SKYLD EQAAK EFIAW LVKGa (lactam @ 12-16; SEQ ID NO:
  • HSEGT FTSDY SKYLD EQAAK EFIAW LVKGa (lactam @ 16-20; SEQ ID NO:
  • HX2EGT FTSDY SKYLD ERRAQ DFVQW LMNTa (SEQ ID NO: 172) HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (SEQ ID NO: 173) HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 174) HX2EGT FTSDY SKYLD ERRAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 175) HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 176) HX2EGT FTSDY SKYLD KRRAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 177) HX2EGT FTSDY SKYLD ERAAK DFVQW LMNTa (SEQ ED NO: 178) H
  • HX2EGT FTSDY SKYLD ERRAQ DFVQW LMNTa (SEQ DD NO: 189)
  • HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (SEQ DD NO: 190)
  • HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 16-20; SEQ DD NO: 191) HX2EGT FTSDY SKYLD ERRAQ DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 192) HX2EGT FTSDY SKYLD ERRAK DFVQW LMNTa (lactam @ 12-16; SEQ DD NO: 193) HX2EGT FTSDY SKYLD KRRAE DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 194) HX2EGT FTSDY SKYLD ERAAK DFVQW LMNTa (SEQ DD NO: 195)
  • HX2EGT FTSDY SKYLD ERAAK DFVQW LMNTa (lactam @ 16-20; SEQ ID NO: 196) HX2EGT FTSDY SKYLD ERAAQ DFVQW LMNTa (lactam @ 12-16; SEQ DD NO: 197) HX2EGT FTSDY SKYLD ERAAK DFVQW LMNTa (lactam @ 12-16; SEQ ID NO: 198) HX2EGT FTSDY SKYLD KRAAE DFVQW LMNTa (lactam @ 16-20; SEQ DD NO: 199) HX2EGT FTSDY SKYLD EQAAK EFIAW LMNTa (SEQ DD NO: 200) HX2EGT FTSDY SKYLD EQAAK EFIAW LMNTa (lactam @ 12-16; SEQ ID NO: 201) HX2EGT FTSDY SKYLD EQAAK EFIAW LMNTa (lactam
  • HSQGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 206) HSQGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 207) HSQGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 208) HSQGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 209) HSQGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 210) HSQGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 211) HSQGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 212) HSQGT FTSDY SK
  • HX2QGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 240) HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 241) HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 242) HX2QGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 243) HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 244) HX2QGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 245) HX2QGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 246) H
  • HX2QGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 257)
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 258) - -
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 259) HX2QGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 260) HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 261) HX2QGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 262) HX2QGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 263)
  • HX2QGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 264) HX2QGT FTSDY SKYLD ERAAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 265) HX2QGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 266) HX2QGT FTSDY SKYLD KRAAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 267) HX2QGT FTSDY SKYLD EQAAK EFIC*W LMNTa (SEQ ID NO: 268)
  • HSEGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 274) HSEGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 275) HSEGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 276) HSEGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 277)
  • HSEGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 278)
  • HSEGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 279)
  • HSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 280) HSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 281) HSEGT FTSDY SKYLD ERAAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 282) HSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 283) HSEGT FTSDY SKYLD KRAAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 284) HSEGT FTSDY SKYLD EQAAK EFIC*W LMNTa (SEQ ID NO: 285) HSEGT FTSDY SKYLD EQAAK EFIC*W LMNTa (lactam @ 12-16; SEQ ID NO: 286) HSEGT FTSDY SK
  • HSEGT FTSDY SKYLD EQAAK EFIC*W LVKGa (lactam @ 12-16; SEQ ID NO: 289)
  • HSEGT FTSDY SKYLD EQAAK EFIC*W LVKGa (lactam @ 16-20; SEQ ID NO: 290)
  • XlSEGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 293)
  • XlSEGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 294)
  • XlSEGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 295)
  • XlSEGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 296)
  • XlSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 297)
  • XlSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 298)
  • XlSEGT FTSDY SKYLD ERAAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 299)
  • XlSEGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 300)
  • XlSEGT FTSDY SKYLD KRAAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 301)
  • XlSEGT FTSDY SKYLD EQAAK EFIC*W LMNTa (SEQ ID NO: 302)
  • HX2EGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 308)
  • HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 309)
  • HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 310)
  • HX2EGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 311) HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 312) HX2EGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 313) HX2EGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 314) HX2EGT FTSDY SKYLD ERAAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 315) HX2EGT FTSDY SKYLD ERAAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 316) HX2EGT FTSDY SKYLD ERAAK DFVC*W LMNTa (l
  • HX2EGT FTSDY SKYLD EQAAK EFIC*W LVKGa (lactam @ 12-16; SEQ ID NO: 323) HX2EGT FTSDY SKYLD EQAAK EFIC*W LVKGa (lactam @ 16-20; SEQ ID NO: 324)
  • X2 Aminoisobutyric acid
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HX2EGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (SEQ ID NO: 325) HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 326) HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 327) HX2EGT FTSDY SKYLD ERRAQ DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 328) HX2EGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 12-16; SEQ ID NO: 329) HX2EGT FTSDY SKYLD KRRAE DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 330) HX2EGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 331)
  • HSQGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 342) HSQGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ID NO: 343) HSQGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ E) NO: 344) HSQGT FTSDY SKYLD C*QAAK EFIAW LVKGa (SEQ ID NO: 345) XlSQGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 346) XlSQGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ID NO: 347) XlSQGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ ID NO: 348) XlSQGT FTSDY SKYLD C*QAAK EFIAW LVKGa (SEQ ID NO
  • HX2QGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 350) HX2QGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ID NO: 351) HX2QGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ ID NO: 352) HX2QGT FTSDY SKYLD C*QAAK EFIAW LVKGa (SEQ ID NO: 353)
  • X2 Aminoisobutyric acid
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HX2QGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 354) HX2QGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ED NO: 355) HX2QGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ ID NO: 356) HX2QGT FTSDY SKYLD C*QAAK EFIAW LVKGa (SEQ ID NO: 357)
  • X2 (D-AIa)
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HX2EGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 366) HX2EGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ID NO: 367) HX2EGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ ID NO: 368) HX2EGT FTSDY SKYLD C*QAAK EFIAW LVKGa (SEQ ID NO: 369)
  • X2 (D-AIa) ; and wherein the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HX2EGT FTSDY SKYLD C*RRAK DFVQW LMNTa (SEQ ID NO: 370) HX2EGT FTSDY SKYLD C*RAAK DFVQW LMNTa (SEQ ID NO: 371) HX2EGT FTSDY SKYLD C*QAAK EFIAW LMNTa (SEQ ID NO: 372) HX2EGT FTSDY SKYLD C*QAAK EHAW LVKGa (SEQ ID NO: 373)
  • X2 (D-AIa)
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HSQGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 374) HSQGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 375) HSQGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 376) HSQGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 377) HSQGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 378) HSQGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 379) HSQGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 380) HSQGT FTSDY
  • XlSQGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 391) XlSQGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 392) XlSQGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 393) XlSQGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 394) XlSQGT FTSDY SKYLD ERAAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 395) XlSQGT FTSDY SKYLD ERAAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 396) XlSQGT FTSDY SKYLD ERAAK DFVQW
  • HX2QGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 402) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 403) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 404) HX2QGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 405) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 406) HX2QGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 407) HX2QGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 408) HX
  • HX2QGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 416) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 417) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 418) HX2QGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ BD NO: 419) HX2QGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 420) HX2QGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 421) HX2QGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 422)
  • HSEGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 430) HSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 431) HSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 432) HSEGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 433) HSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 434) HSEGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 435) HSEGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 436) HSEGT FTSDY SKYLD ERAAK DF
  • XlSEGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 444) XlSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 445) XlSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 446) XlSEGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 447) XlSEGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 448) XlSEGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 449) XlSEGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 450)
  • HX2EGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 458)
  • HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 459)
  • HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 460) HX2EGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 461) HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ED NO: 462) HX2EGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ED NO: 463) HX2EGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ED NO: 464)
  • HX2EGT FTSDY SKYLD ERAAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 465) HX2EGT FTSDY SKYLD ERAAQ DFVQW LMDTa (lactam @ 12-16; SEQ ED NO: 466) HX2EGT FTSDY SKYLD ERAAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 467) HX2EGT FTSDY SKYLD KRAAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 468) HX2EGT FTSDY SKYLD EQAAK EFIAW LMDTa (SEQ ID NO: 469)
  • HX2EGT FTSDY SKYLD EQAAK EFIAW LMDTa (lactam @ 12-16; SEQ ID NO: 470)
  • HX2EGT FTSDY SKYLD EQAAK EFIAW LMDTa (lactam @ 16-20; SEQ ID NO: 471)
  • X2 Aminoisobutyric acid
  • HX2EGT FTSDY SKYLD ERRAQ DFVQW LMDTa (SEQ ID NO: 472) HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (SEQ ID NO: 473) HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 474) HX2EGT FTSDY SKYLD ERRAQ DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 475) HX2EGT FTSDY SKYLD ERRAK DFVQW LMDTa (lactam @ 12-16; SEQ ID NO: 476) HX2EGT FTSDY SKYLD KRRAE DFVQW LMDTa (lactam @ 16-20; SEQ ID NO: 477) HX2EGT FTSDY SKYLD ERAAK DFVQW LMDTa (SEQ ID NO: 478) HX
  • glucagon peptides with a GLP-1/glucagon activity ratio of about 5 or more are also constructed generally as described above in Examples 1-11.
  • AIB at position 2 provides DPP IV resistance but also significantly reduces glucagon activity.
  • HX2QGT FTSDY SKYLD EQAAK EFTC*W LMNTa (SEQ ID NO: 486)
  • HX2QGT FTSDY SKYLD EQAAK EFIAW LMNC*a (SEQ ID NO: 487)
  • HX2QGT FTSDY SKYLD EQAAK EFIAW LMNGG PSSGA PPPSC*a (lactam @ 16-20; SEQ ID NO: 489)
  • HX2QGT FTSDY SKYLD EQAAK EFIC*W LMNGG PSSGA PPPSa (SEQ ID NO: 490) HX2QGT FTSDY SKYLD EQAAK EFIC*W LMNGG PSSGA PPPSa (lactam @ 16-20; SEQ ID NO: 491)
  • HX2QGT FTSDY SKYLD ERAAK DFVC*W LMNTa (SEQ ID NO: 492)
  • HX2QGT FTSDY SKYLD ERAAK DFVQW LMNC*a (SEQ ID NO: 493)
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (SEQ ID NO: 498) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNC*a (SEQ ID NO: 499) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNGG PSSGA PPPSC*a (SEQ BD NO: 500) HX2QGT FTSDY SKYLD ERRAK DFVQW LMNGG PSSGA PPPSC*a (lactam @ 16-20; SEQ DD NO: 501)
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNGG PSSGA PPPSa (SEQ ID NO: 502)
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNGG PSSGA PPPSa (lactam @ 16-20; SEQ ID NO: 503)
  • X2 ADB
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • glucagon peptides which are GLP-1/glucagon co-agonists are also constructed generally as described above in Examples 1-11. Formation of a lactam bridge between amino acids 16 and 20 restores the reduction in glucagon activity caused by the substitution at position 2.
  • HX2QGT FTSDY SKYLD EQAAK EFIC*W LMNTa (lactam @ 16-20; SEQ ID NO: 504)
  • the C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 517) HX2QGT FTSDY SKYLD ERRAK DFVC*W LMNTa (lactam @ 16-20; SEQ ID NO: 528) HX2QGT FTSDY SKYLD ERRAK EFIC * W LMNGG PSSGA PPPSC*a (SEQ ID NO: 531 ) HX2QGT FTSDY SKYLD EQAAK EFIAW LMNGG PSSGA PPPSC*C*a (SEQ ID NO: 532)
  • HX2QGT FTSDY SKYLD EQAAK EFIC*W LMNGG PSSGA PPPSa (SEQ ID NO: 533)
  • Xl DMIA (alpha, alpha-dimethyl imidiazole acetic acid)
  • C* is a Cys, or a Cys attached to a hydrophilic polymer, or alternatively the C* is a Cys attached to a polyethylene glycol of about 20 kD average weight, or alternatively the C* is a Cys attached to a polyethylene glycol of about 40 kD average weight.
  • HSQGT FTSDYSKYLD SRRAQ DFVQW LMNTGPSSGAPPPSa SEQ ID NO: 521) HSQGT FTSDYSKYLD SRRAQ DFVQW LMNGGPSSGAPPPSa (SEQ ID NO: 522) HSQGT FTSDYSKYLD SRRAQ DFVQW LMKGGPSSGAPPPSa (SEQ ID NO: 523) HSQGT FTSDYSKYLD SRRAQ DFVQW LVKGGPSSGAPPPSa (SEQ ID NO: 524) HSQGT FTSDYSKYLD SRRAQ DFVQW LMDGGPSSGAPPPSa (SEQ ID NO: 525) HSQGT FTSDYSKYLD ERRAK DFVQW LMDGGPSSGAPPPSa (SEQ ID NO: 526) HAEGT FTSDV SSYLE GQAAK EFIAW LVKGGa (SEQ ID NO: 527)
  • X2 Ser, D-serine, Ala, VaI, glycine, N-methyl serine or aminoisobutyric acid (AIB),
  • X4 Thr-CONH2 or Cys-PEG or GGPSSGAPPPS (SEQ ID NO: 515) or
  • X3 is Cys-PEG
  • X4 is not Cys-PEG or GGPSSGAPPPSC-PEG
  • X2 Ser, D-serine, Ala, VaI, glycine, N-methyl serine or aminoisobutyric acid (AIB),
  • X4 Thr-CONH2 or Cys-PEG or GGPSSGAPPPS (SEQ ID NO: 515) or
  • X3 is Cys-PEG
  • X4 is not Cys-PEG or GGPSSGAPPPSC-PEG
  • any of the preceding sequences can include additional modifications, e.g., 1, 2, 3, 4 or 5 modifications that do not destroy activity, including but not limited to WlO or R20 substitutions that can be used to enhance potency. Any of the preceding sequences can also be produced without the modifications that confer DPP IV resistance, i.e. in which the native His is at position 1 and the native Ser is at position 2.
  • any of the preceding compounds may optionally be linked to a conjugate, such as a heterologous polypeptide, an immunoglobulin or a portion thereof (e.g. Fc region), a targeting agent, a diagnostic label, or a diagnostic or therapeutic agent.
  • glucagon peptides modified to comprise the c-terminal extension of SEQ ID NO: 26 linked to the carboxy terminus of the glucagon peptide were constructed generally as described above in Examples 1-11 and assayed for activity at the GLP-I and glucagon receptors using the in vitro assay described in Example 14.
  • Table 11 represents the activity of various glucagon analogs at the glucagon and GLP-I receptors.
  • the data shows that for glucagon analogs comprising the c- terminal extension of SEQ ID NO: 26, amino acid substititions at positions 16, 20, 28 and 29 can impact the analogs activity at the GLP-I receptor.
  • Table 12 represents in vitro data accumulated for various glucagon peptides comparing their relative activities at the glucagon and GLP-I receptors.

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MX2009008241A MX2009008241A (es) 2007-02-15 2008-02-13 Co-agonistas de receptor de glucagon/glp-1.
KR1020157026403A KR20150116465A (ko) 2007-02-15 2008-02-13 글루카곤/ｇｌｐ-1 수용체 공동-항진물질
US12/527,140 US8454971B2 (en) 2007-02-15 2008-02-13 Glucagon/GLP-1 receptor co-agonists
EA200901108A EA017849B1 (ru) 2007-02-15 2008-02-13 Соагонисты глюкагоновых/glp-1-рецепторов
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