WO2024022465A1 - 一种人胰淀素多肽衍生物及其用途 - Google Patents
一种人胰淀素多肽衍生物及其用途 Download PDFInfo
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- WO2024022465A1 WO2024022465A1 PCT/CN2023/109707 CN2023109707W WO2024022465A1 WO 2024022465 A1 WO2024022465 A1 WO 2024022465A1 CN 2023109707 W CN2023109707 W CN 2023109707W WO 2024022465 A1 WO2024022465 A1 WO 2024022465A1
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- WIPO (PCT)
- Prior art keywords
- human amylin
- amylin polypeptide
- polypeptide derivative
- γglu
- ser
- Prior art date
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- 230000037221 weight management Effects 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
- A61P5/48—Drugs for disorders of the endocrine system of the pancreatic hormones
-
- 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
-
- 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
Definitions
- the invention relates to the field of medicine, and in particular to a human amylin polypeptide derivative and its medical use.
- Islet Amyloid Polypeptide also known as amylin, is a sugar-regulating pancreatic hormone co-secreted with insulin, involved in delaying gastric emptying and inhibiting postprandial glucagon release.
- IAPP is a satiety factor that reduces energy intake and participates in regulating appetite and satiety by activating receptors in the hindbrain area and the nucleus of the solitary tract in the hindbrain. It can also enhance hepatocyte and plasma triglyceride metabolism, reduce liver adipose tissue and lipid deposition, and reduce plasma triglyceride fluctuations.
- hIAPP Human amylin
- SEQ ID No: 1 Human amylin
- IAPP-modified proteins targeting amylin receptor (AMYR) and calcitonin G protein-coupled receptor (CTR) as adjuvant therapy for weight control, and may be combined with other treatments (such as GLP-1 , leptin, etc.) play a supplementary role.
- AMDR amylin receptor
- CTR calcitonin G protein-coupled receptor
- hIAPP cannot be used as a therapeutic agent due to its amyloidogenicity (fibrillation), chemical instability, and solubility properties.
- Pramlintide (SEQ ID No: 2) was developed by Amylin Pharmaceuticals to An auxiliary treatment product for diabetes (type 1 and type 2) on the market has a certain affinity for the calcitonin receptor and binds with a high affinity to the amylin peptide receptor.
- pramlintide has A25P, S28P and S29P amino acid substitutions, which overcomes the continuous proliferation and insoluble physical properties of hIAPP, and avoids self-replication, amyloid deposition formation, and B cell apoptosis to a certain extent, while fully Preserves the hypoglycemic effect of amylin.
- pramlintide has certain advantages, it has a short half-life and needs to be injected 2-3 times a day. At the same time, it still has the same insoluble characteristics at physiological pH as hIAPP.
- WO2006105527, WO2012168431, CN201280028554.1, and WO2013156594 disclose hIAPP analogs and/or derivatives with improved pharmacokinetic or pharmacodynamic (PK/PD) properties.
- PK/PD pharmacokinetic or pharmacodynamic
- most of the currently disclosed hIAPP analogs or derivatives exist Easy to fibrate, poor solubility, short half-life, and poor efficacy.
- the human amylin polypeptide analog disclosed in CN201280028554.1 has better efficacy and druggability.
- the human amylin polypeptide has an albumin-binding portion and is similar to pramlintide. Significantly extended half-life.
- Cagrilintide also known as AM833
- its partial amino acid sequence of the polypeptide is SEQ ID No: 3.
- cagrilintide may still show poor physical stability under certain conditions, and there is still a need to find hIAPP polypeptide substances with natural hIAPP activity, long in vivo action time, good stability, higher solubility, and resistance to fibrosis.
- the invention relates to human amylin polypeptide analogs containing unnatural amino acids, the sequences of which are as follows:
- diaminoacetic acid D-ornithine, D-diaminobutyric acid, D-homoarginine, D-citrulline or D-diaminopropionic acid;
- the inventor of the present application unexpectedly discovered that when the N-terminus of the human amylin polypeptide is a basic amino acid, the isoelectric point of the polypeptide can be effectively increased, resulting in improved solubility and/or physical stability.
- the inventors prefer to introduce non-natural basic amino acids into the N-terminus of human amylin, such as L-ornithine (L-Orn), L-diaminobutyric acid, L-hypersine Acid, L-diaminopropionic acid, diaminoacetic acid, D-ornithine (D-Orn), D-diaminobutyric acid, D-homarginine or D-diaminopropionic acid.
- L-Orn L-ornithine
- D-Orn L-diaminobutyric acid
- D-homarginine or D-diaminopropionic acid such as L-ornithine (L-Orn), L-diaminobutyric acid, L-hypersine Acid, L-diaminopropionic acid, diaminoacetic acid, D-ornithine (D-Orn), D-diaminobutyric acid, D-
- the non-natural basic amino acid introduced in the present invention is L-ornithine (L-Orn).
- the present invention provides a human amylin polypeptide derivative modified with albumin-binding residues, the structural formula of which is as follows: YLZ (I)
- Y is an albumin-binding residue
- L is a linker
- Z is a human amylin polypeptide analog, whose sequence is shown in SEQ ID No: 4, between the two Cys residues at positions 2 and 7 in the sequence There is an intramolecular disulfide bond between them, and the C-terminal end of the polypeptide is an amide;
- X in SEQ ID No: 4 is an unnatural amino acid, independently selected from L-ornithine, L-diaminobutyric acid, dimethylalanine Aib, L-homarginine, L-citrulline, L-diaminopropionic acid, diaminoacetic acid, D-ornithine, D-diaminobutyric acid, D-homarginine, D-citrulline or D-diaminopropionic acid;
- albumin binding residue is connected to the non-natural amino acid at the N-terminus of the human amylin polypeptide through a linker.
- L is a linker, which may exist independently or not.
- the linker may comprise one or more amino acids that bind to the albumin binding moiety at one end and to the amino group on the N-terminal unnatural amino acid of the human amylin polypeptide at the other end.
- albumin-binding residue in the human amylin polypeptide derivative modified with an albumin-binding residue, wherein Y is an albumin-binding residue, and the term "albumin-binding residue" as used herein means with Residues to which human serum albumin binds non-covalently.
- Albumin-binding residues linked to human amylin polypeptide analogs typically have a binding affinity for human serum albumin of less than about 10 ⁇ M or even less than about 1 ⁇ M.
- the albumin binding residue (Y) and the linker (L) part can be collectively referred to as a substituent.
- the human amylin polypeptide derivative represented by structural formula (I) may contain at least one substituent, such as 1, 2 or 3.
- the human amylin polypeptide derivative represented by structural formula (I) preferably contains 1 substituent.
- the albumin binding residue has 6-40 carbon atoms, 8-26 carbon atoms, or 14-22 carbon atoms, such as 16, 17, 18, 19, 20 carbon atoms.
- preferred albumin binding residues comprise groups that can be negatively charged at pH 7.4.
- albumin binding residue is an acyl group selected from:
- the present invention introduces unnatural amino acids into the N-terminus of human amylin, which can effectively prevent enzyme degradation and extend the half-life; at the same time, when the N-terminus is preferably introduced into non-natural basic amino acids, the isoelectric point of the polypeptide can be effectively improved, making it Have improved solubility and/or physical stability.
- the human amylin polypeptide derivative provided by the present invention shows better solubility, better stability in solution, and is not prone to fibrosis.
- the biological activity measurement shows that the human amylin polypeptide derivative provided by the present invention has equivalent or higher in vitro biological activity than Cagrilintide.
- the present invention provides a pharmaceutical composition
- a pharmaceutical composition comprising a therapeutically effective amount of the human amylin polypeptide analog or derivative thereof and a pharmaceutically acceptable carrier.
- the present invention provides the use of the human amylin polypeptide analog or derivative thereof for the treatment of obesity and obesity-related diseases, including but not limited to obesity, diabetes, non-alcoholic fat hepatitis (NASH), hypertension and cardiovascular disease.
- the medicinal purposes include reducing food intake, reducing appetite and/or promoting weight loss.
- the human amylin polypeptide analogs or derivatives thereof of the present invention can also be used in combination with one or more targeted drugs, including but not limited to diabetes drugs, obesity drugs and hypertension drugs.
- FIG. 1 Liquid phase diagram of compound A. The liquid phase results showed that the liquid phase purity of Compound A was 97%.
- Figure 3 Liquid phase diagram of compound 1. The liquid phase results showed that the liquid phase purity of compound 1 was 98.6%.
- Figure 5 Biological activity assay.
- the results of the calcitonin receptor and ⁇ -galactosidase reporter gene method to detect compound 1 and AM833 showed that the ⁇ -galactosidase signals generated by the two after stimulating the calcitonin receptor were basically the same, and the EC 50 were respectively 6.308nM and 6.720nM, both have similar biological activities, and the EC 50 value of compound 1 is about 6% higher than that of AM833.
- Figure 7 Concentration response binding curves of compound 1 and AM833 with CTR/AMY1R/AMY2R/AMY3R transiently transfected COS-1 cells.
- FIG. 11 The efficacy test of compound 1 combined with Semaglutide on weight loss in DIO mice.
- Compound 1 was injected combined with Semaglutide, the weight loss effect on DIO mice was significantly stronger than that of a single drug, indicating that combined administration has a synergistic weight loss effect.
- amino acids as used herein are defined as natural amino acids and unnatural amino acids. Natural amino acids include, but are not limited to, alanine (Ala), arginine (Arg), asparagine (Asn), cysteine (Cys), glutamine (Gln), glutamic acid (Glu), glycine (Gly), histidine (His), isoleucine (Ile), leucine (Leu), phenylalanine (Phe), proline (Pro), serine (Ser), threonine ( Thr and valine (Val).
- Unnatural amino acids refer to amino acids that are not encoded by the 64 existing genetic codes.
- the unnatural amino acids referred to herein include, but are not limited to, L-ornithine (L-Orn), L-diaminobutyric acid, dimethylalanine (Aib), L-homarginine, and L-citrulline Acid, L-diaminopropionic acid, diaminoacetic acid, D-ornithine (D-Orn), D-diaminobutyric acid, D-homarginine, D-citrulline or D-diaminopropionic acid . Its structural formula is as follows:
- Human amylin polypeptide refers to a polypeptide having the sequence described in SEQ ID No: 1.
- Human amylin polypeptide (hIAPP) is a polypeptide hormone composed of 37 amino acid residues. After being synthesized in cells, it is stored together with insulin in insulin secretory vesicles in pancreatic islet ⁇ cells. After the pancreatic islet ⁇ cells respond to external stimuli, co-secreted.
- SEQ ID No: 1 and human amylin polypeptide are used interchangeably.
- the amino acid sequence and structure of human amylin polypeptide (hIAPP) is as follows:
- Pramlintide refers to a synthetic polypeptide having the sequence described in SEQ ID No: 2. In this article, SEQ ID No:2 and pramlintide are used interchangeably. The amino acid sequence and structure of pramlintide defined herein are as follows:
- Cagrilintide refers to a synthetic polypeptide having the sequence set forth in SEQ ID No: 3.
- SEQ ID No: 3 and Cagrilintide/AM833 are used interchangeably.
- the amino acid sequence of Cagrilintide defined herein is as follows, in which there is an intramolecular disulfide bond between the two Cys residues at positions 2 and 7, and the C-terminus of the polypeptide is an amide: KCNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP (SEQ ID No: 3 ) or Lys Cys Asn Thr Ala Thr Cys Ala Thr Gln Arg Leu Ala Glu Phe Leu Arg His Ser Ser Asn Asn Phe Gly Pro Ile Leu Pro Pro Thr Asn Val Gly Ser Asn Thr Pro (SEQ ID No: 3)
- sequence “variant” refers to a sequence that differs from the sequence shown at one or more amino acid residues but retains the biological activity of the resulting molecule.
- a "polypeptide analog” is defined as one or more amino acid substitutions and/or one or more deletions and/or one or more additions/insertions to a polypeptide as described above.
- Amino acid substitution modification refers to the substitution of amino acid residues by amino acid residues with similar side chains or physical and chemical characteristics, where the amino acids can be natural or unnatural amino acids.
- the amino acid substitution modifications include but are not limited to lysine in the peptide chain. -Ornithine substitution, aspartate-glutamic acid substitution, valine-arginine substitution and tyrosine-proline substitution.
- the number of amino acid insertions, additions, deletions or substitutions may be at least 1, but there may be up to 2, 3, 4, 5, 6, 7, 8, 9 or 10 amino acid insertions, additions , missing or replaced. Substitutions or additions may be made to any natural or unnatural amino acid, synthetic amino acid, peptidomimetic or other compound.
- the addition or deletion of amino acid residues can occur at the N-terminus of the peptide and/or at the C-terminus of the peptide.
- Human amylin polypeptide derivative as used herein is defined as a product obtained by chemically modifying the amino terminus (N-terminus) to the carboxyl terminus (C-terminus) of the above-mentioned polypeptide or analog. Chemical modifications include, but are not limited to, changes such as amidation, glycosylation, acylation, sulfation, phosphorylation, acetylation, and cyclization. Human amylin polypeptide derivatives may contain one or more substituents on one or more of the amino acid residues of the polypeptide.
- substituted as used herein means any suitable moiety that is bonded (especially covalently bonded) to an amino acid residue, in particular to any available position on the amino acid residue. Usually the appropriate section is the chemistry section. Substituents are attached to the polypeptide's natural or unnatural amino acids.
- the derivative has a substituent on one amino acid residue that is the amino acid residue on the N-terminal residue. In some embodiments, the derivative has a substitution on the N-terminal amino acid residue, which is ornithine.
- albumin-binding residue means a residue that non-covalently binds to human serum albumin.
- Albumin-binding residues linked to human amylin polypeptide analogs typically have a binding affinity for human serum albumin of less than about 10 ⁇ M or even less than about 1 ⁇ M.
- Albumin binding affinity can be determined by several methods known in the art, and the EC50 value for competition is a measure of the affinity of a compound.
- Various albumin binding residues are known, among which are linear and branched lipophilic moieties containing 12-40 carbon atoms, compounds with a cyclopentanophenanthrene skeleton and/or peptides with 10-45 amino acid residues wait.
- Albumin binding properties can be measured by surface plasmon resonance as described in J. Biol. Chem. 277 (38), 35035-35042, (2002). Albumin binding residues and affinity determination methods are described in detail in CN201280028554.1 and CN201180015252.6, all of which are incorporated herein by reference.
- fibrillation refers to physical interactions between polypeptide molecules that result in the formation of oligomers that may remain dissolved or may be large visible aggregates that precipitate out of solution.
- the degree of fibrillation of polypeptides can be determined by visual inspection, chromatographic methods, ThT fibrillation assay (sometimes called ThT fibril generation assay) and/or turbidity measurement. The relevant methods are described in detail in CN201280028554.1, etc., all of which are incorporated here. Reference.
- linker refers to any suitable moiety connecting a substituent to a human amylin polypeptide or analog thereof.
- the linker can be a new substituent together with a substituent moiety (eg, albumin binding moiety). Connectors can exist independently or not.
- the linker may comprise one or more amino acids, or a combination of at least one amino acid and an amine. In one embodiment it is preferred that the amine is the group OEG.
- the linker binds to the albumin binding moiety at one end and to the amino group on the N-terminal unnatural amino acid of the human amylin polypeptide at the other end.
- an “effective amount” includes an amount sufficient to ameliorate or prevent symptoms or symptoms of a medical disease.
- An effective amount also means an amount sufficient to enable diagnosis or to facilitate diagnosis.
- the effective amount for a particular subject will vary depending on factors such as the disease to be treated, the patient's overall health, the method, route and dosage of administration, and the severity of side effects.
- An effective amount may be the maximum dosage or dosage regimen that avoids significant side effects or toxic effects.
- “Pharmaceutically acceptable carrier” includes any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like that are physiologically compatible.
- the carrier for the composition containing the polypeptide or derivative thereof is suitable for intravenous (IV), intramuscular, subcutaneous (SC), parenteral, spinal or epidermal administration (eg, by injection or infusion).
- subject or “patient” includes humans and non-human animals.
- Non-human animals include all vertebrates, such as mammals and non-mammals, such as non-human primates, sheep, dogs, mice, rats, cats, cattle, horses, chickens, amphibians and reptiles.
- the present invention relates to human amylin polypeptide analogs and polypeptide derivatives thereof.
- the derivatives are prepared by substituting unnatural amino acids and modifying N-terminal fatty acids to pramlintide (SEQ ID No: 2).
- the human amylin polypeptide derivatives become The tendency of fibrillation is significantly reduced, the solubility in water is significantly increased, and the stability of the compound is significantly increased.
- the pharmacological half-life of human amylin peptide derivatives is significantly extended and has good pharmacodynamic properties.
- AM833 it has equivalent or higher biological activity and can be used for the treatment of obesity and obesity-related diseases.
- the invention relates to human amylin polypeptide analogs containing unnatural amino acids, the sequences of which are as follows:
- diaminoacetic acid D-ornithine, D-diaminobutyric acid, D-homoarginine, D-citrulline or D-diaminopropionic acid;
- the inventor introduced unnatural amino acids into the N-terminus of human amylin, which can effectively prevent enzyme degradation and extend the half-life.
- the inventor of the present application unexpectedly discovered that when the N-terminus of the human amylin polypeptide is a basic amino acid, the isoelectric point of the polypeptide can be effectively increased, resulting in improved solubility and/or physical stability.
- the inventors prefer to introduce non-natural basic amino acids to the N-terminus of human amylin, such as L-ornithine (L-Orn), L-diaminobutyric acid, L-homoarginine, L-diaminopropionic acid, diaminoacetic acid, D-ornithine (D-Orn), D-diaminobutyric acid, D-homoarginine and D-diaminopropionic acid.
- the non-natural basic amino acid introduced in the present invention is L-ornithine (L-Orn).
- the structural formula of basic amino acids is as follows:
- the present invention provides a human amylin polypeptide derivative modified with albumin-binding residues, the structural formula of which is as follows: YLZ (I)
- Y is the albumin-binding residue
- L is the linker
- Z is the human amylin polypeptide analog, whose sequence is shown in SEQ ID No: 4, between the two Cys residues at positions 2 and 7 in the sequence There is an intramolecular disulfide bond, and the C-terminus of the polypeptide is an amide;
- X in SEQ ID No: 4 is an unnatural amino acid, independently selected from L-ornithine, L-diaminobutyric acid, dimethylalanine Aib, L-homarginine, L-citrulline, L-diaminopropionic acid, diaminoacetic acid, D-ornithine, D-diaminobutyric acid, D-homarginine, D-citrulline or D-diaminopropionic acid;
- albumin binding residue is connected to the non-natural amino acid at the N-terminus of the human amylin polypeptide through a linker.
- the sequence of Z is as shown in SEQ ID No: 4, wherein the amino acids shown. More preferably, X as shown in SEQ ID No: 4 is L-ornithine.
- L is a linker, which may exist independently or not.
- the linker may comprise one or more amino acids that bind to the albumin binding moiety at one end and to the amino group on the N-terminal unnatural amino acid of the human amylin polypeptide at the other end.
- preferred linkers are selected from ⁇ Glu, ⁇ Glu- ⁇ Glu, ⁇ Glu- ⁇ Glu- ⁇ Glu, ⁇ Glu- ⁇ Glu- ⁇ Glu, Glu, Glu-Glu, Glu- ⁇ Glu, Glu-Arg, Glu-Glu-Arg, His , His-His, His- ⁇ Glu, His-His- ⁇ Glu, Gly, Gly- ⁇ Glu, Ser, Ser- ⁇ Glu, D-Arg-D-Arg, Arg, Arg-Arg, Arg-Arg- ⁇ Glu, Ser-Ser ,-Gly-Ser-Ser,Ser-Ser,-Gly-Ser-Ser- ⁇ Glu, Ser-Ser-Gly-Ser-Ser-Gly, Ser-Ser-Gly-Ser-Ser-Gly- ⁇ Glu, ⁇ Glu-OEG, ⁇ Glu-2xOEG and OEG, preferably the linker is selected from ⁇ Glu, ⁇ Glu- ⁇ Glu, ⁇ Glu-OEG, ⁇ Glu-2xOEG and OEG, preferably the
- linker term " ⁇ Glu" means an amino acid residue with the following structure:
- spacer linker is a combination of at least one amino acid and an amine.
- the amine is the group OEG, wherein the structural formula of OEG is as follows:
- ⁇ Glu-OEG a moiety having the following structure:
- ⁇ Glu-OEG-OEG a moiety having the following structure:
- linker may be selected from the group consisting of:
- albumin-binding residue in the human amylin polypeptide derivative modified with an albumin-binding residue, wherein Y is an albumin-binding residue, and the term "albumin-binding residue" as used herein means with Residues to which human serum albumin binds non-covalently.
- Albumin-binding residues linked to human amylin polypeptide analogs typically have a binding affinity for human serum albumin of less than about 10 ⁇ M or even less than about 1 ⁇ M.
- Various albumin binding residues are known, among which are linear and branched lipophilic moieties containing 12-40 carbon atoms, compounds with a cyclopentanophenanthrene skeleton and/or peptides with 10-45 amino acid residues wait.
- Albumin binding properties can be measured by surface plasmon resonance as described in J. Biol. Chem. 277 (38), 35035-35042, (2002).
- the albumin binding residue has 6-40 carbon atoms, 8-26 carbon atoms, or 12-22 carbon atoms, such as 16, 17, 18, 19, 20 carbon atoms.
- preferred albumin binding residues comprise groups that can be negatively charged at pH 7.4.
- albumin binding residue is an acyl group selected from:
- the albumin binding residue is an acyl group selected from CH 3 (CH 2 ) r CO-, where r is an integer from 12 to 20, more preferably selected from CH 3 (CH 2 ) 12 CO-, CH 3 (CH 2 ) 14 CO-, CH 3 (CH 2 ) 16 CO-, CH 3 (CH 2 ) 18 CO-, CH 3 (CH 2 ) 20 CO-, and CH 3 (CH 2 ) 22 CO-;
- the albumin binding residue further comprises a carboxylic acid group, such as HOOC( CH2 ) sCO- , where s is an integer from 12 to 22. More preferably, it is selected from HOOC(CH 2 ) 14 CO-, HOOC(CH 2 ) 16 CO-, HOOC(CH 2 ) 18 CO- or HOOC(CH 2 ) 20 CO-.
- a carboxylic acid group such as HOOC( CH2 ) sCO- , where s is an integer from 12 to 22. More preferably, it is selected from HOOC(CH 2 ) 14 CO-, HOOC(CH 2 ) 16 CO-, HOOC(CH 2 ) 18 CO- or HOOC(CH 2 ) 20 CO-.
- the albumin binding residue (Y) and the linker (L) part can be collectively referred to as a substituent.
- the human amylin polypeptide derivative represented by structural formula (I) may contain at least one substituent, such as 1, 2 or 3.
- the human amylin polypeptide derivative represented by structural formula (I) preferably contains 1 substituent.
- preferred substituents have a binding affinity for human serum albumin of less than about 10 ⁇ M or less than about 1 ⁇ M.
- Preferred substituents include groups that can be negatively charged at pH 7.4.
- preferred substituents are:
- the invention provides a human amylin polypeptide derivative, wherein:
- the derivative has a structure as shown in formula (I), wherein Z is a human amylin polypeptide analog as shown in SEQ ID No: 4, and X at the N-terminus is ornithine;
- the invention provides a human amylin polypeptide derivative, wherein:
- the derivative has a structure as shown in formula (I), wherein Z is a human amylin polypeptide analog as shown in SEQ ID No: 4, and X at the N-terminus is ornithine;
- the derivative has a solubility of about 200 ⁇ M or higher at pH 7.0.
- the structure of the human amylin polypeptide derivative provided by the present invention is:
- the structure of the human amylin polypeptide derivative provided by the present invention is:
- the structure of the human amylin polypeptide derivative provided by the present invention is:
- the structure of the human amylin polypeptide derivative provided by the present invention is:
- r is an integer from 12 to 20
- s is an integer from 12 to 22.
- the structure of the human amylin polypeptide derivative provided by the present invention is as shown in compounds 1-33 in Table 2 of Example 3.
- the structure of the human amylin polypeptide derivative provided by the present invention is:
- the present invention introduces unnatural amino acids into the N-terminus of human amylin, which can effectively prevent enzyme degradation and extend the half-life; at the same time, when the N-terminus is a basic amino acid, the isoelectric point of the polypeptide can be more effectively increased, making it have improved Solubility and/or physical stability.
- the human amylin polypeptide derivative provided by the present invention has a solubility of about 200 ⁇ M or higher at pH 7.0.
- the human amylin polypeptide derivative shown under the conditions of Example 4 of the present invention has a solubility >60 mg/ml, and delays the tendency of fibrosis formation compared to Cagrilintide (also known as AM833), which is obviously beyond expectations.
- the human amylin polypeptide derivative provided by the present invention shows better physical stability, better stability in solution, and is not prone to fibrosis.
- the biological activity measurement shows that the human amylin polypeptide derivative provided by the present invention has equivalent or higher in vitro biological activity than Cagrilintide.
- the human amylin polypeptide derivative Compound 1 provided by the present invention is compared with Cagrilintide (also known as AM833).
- Cagrilintide also known as AM833
- Compound 1 does not exhibit calcium ion agonism on CTR transient cells and has no calcium ion agonism on AMYR transient cells.
- the calcium ion stimulating ability of both is stronger than AM833, and the binding ability to AMY2R is slightly stronger than AM833.
- Compound 1 and AM833 have similar binding abilities to human serum albumin.
- the human amylin polypeptide derivative provided by the present invention has a comparable or longer half-life and higher bioavailability than Cagrilintide (also known as AM833).
- the human amylin polypeptide derivative provided by the present invention has equivalent or better appetite suppressing effect and weight loss effect than Cagrilintide (also known as AM833).
- the present invention also relates to preparation methods for the synthesis of the human amylin polypeptide analogs and derivatives thereof, which methods can be by solid phase and/or liquid phase methods, stepwise or by fragment assembly, and optionally Steps to isolate and/or purify the final product.
- the method also includes the step of forming a disulfide bond between the cysteine side chain sulfhydryl groups at positions 2 and 7 by oxidative cyclization.
- the method also includes the step of using non-synthetic methods to form C-terminal amidation through recombinant expression, purification and induction means.
- the prepared human amylin polypeptide analogs can be further used to obtain human amylin polypeptide derivatives through the condensation reaction of fatty acid side chains and polypeptides, and optionally are separated and/or purified to obtain the final product. Similar synthesis and purification processes are described in detail in the prior art WO2006105527, CN201180015252.6, CN201280028554.1, WO2012168431 and WO2013156594, all of which are hereby incorporated by reference.
- the present invention provides a pharmaceutical composition
- a pharmaceutical composition comprising a therapeutically effective amount of the human amylin polypeptide analog or derivative thereof and a pharmaceutically acceptable carrier.
- the present invention provides a pharmaceutical composition
- a pharmaceutical composition comprising a human amylin polypeptide analog or a derivative thereof as described above, formulated together with a pharmaceutically acceptable carrier.
- Pharmaceutically acceptable carriers include any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and other physiologically compatible carriers.
- the carrier is suitable for intravenous, intramuscular, subcutaneous, parenteral, spinal or epidermal administration (eg by injection or infusion).
- compositions must generally be sterile and stable under the conditions of production and storage.
- the composition can be formulated into dosage forms such as solution, microemulsion, liposome, or freeze-dried powder.
- the pharmaceutical formulation is a liquid formulation, which may be formulated as a solution or suspension.
- the human amylin polypeptide analog or derivative thereof is present in the formulation at a concentration of from about 0.1 mg/ml to about 25 mg/ml, more preferably from about 1 mg/ml to about 10 mg/ml.
- Medications may be provided directly in unit dose form, such as an injection pen containing the pharmaceutical formulation.
- it can be administered externally through the gastrointestinal tract, such as subcutaneously, intramuscularly, intravenously, percutaneously, etc.
- the pharmaceutical formulation is a lyophilized formulation to which solvents and/or diluents are added by the physician or nurse or patient prior to use.
- the present invention also relates to pharmaceutical preparations comprising the human amylin polypeptide analogs or derivatives thereof.
- the pharmaceutical preparation may include pharmaceutical carriers, excipients or protein protectants.
- Preferred routes of administration of the pharmaceutical compositions of the present invention include intravenous, intramuscular, intradermal, intraperitoneal, subcutaneous, spinal/spinal or other parenteral routes of administration, for example by injection or infusion.
- the actual dosage levels of the active ingredients in the pharmaceutical compositions of the present invention can be varied to obtain an amount of the active ingredient that is effective for a particular patient, composition and mode of administration to achieve the desired therapeutic response while being non-toxic to the patient.
- a "therapeutically effective amount" of a human amylin polypeptide analog or derivative thereof of the present invention preferably results in a reduction in the severity of disease symptoms, an increase in the frequency and duration of disease symptom-free periods, or the prevention of damage or disability caused by the disease .
- One of ordinary skill in the art will be able to determine such amounts based on factors such as the size of the subject, the severity of the subject's symptoms, and the particular composition or route of administration chosen.
- the present invention also relates to the pharmaceutical use of the human amylin polypeptide analog or derivative thereof.
- the present invention provides a method of treating a disease, the method comprising administering a therapeutically effective amount of the human amylin polypeptide analog or derivative thereof to a subject in need of treatment.
- the invention provides methods for treating diseases, which methods include administering a therapeutically effective amount of the human amylin polypeptide analog or derivative thereof of the present invention to a subject in need of treatment.
- subject includes humans and non-human animals.
- Non-human animals include all vertebrates, such as mammals and non-mammals, such as non-human primates, sheep, dogs, mice, rats, cats, cattle, horses, chickens, amphibians and reptiles.
- the subject or individual to which the human amylin polypeptide analog or derivative thereof is administered is a mammal, such as a mouse, a monkey, a dog, a cow, a horse or a human, preferably a human.
- the invention provides the use of the human amylin polypeptide analog or derivative thereof for the treatment of obesity and obesity-related diseases, including but not limited to obesity, diabetes, non-alcoholic Steatohepatitis (NASH), hypertension and cardiovascular disease.
- the pharmaceutical uses include reducing food intake, reducing appetite, promoting weight loss.
- the human amylin polypeptide analogs or derivatives thereof of the present invention can also be used in combination with one or more targeted drugs, including but not limited to diabetes drugs, obesity drugs and hypertension drugs such as GLP-1 derivatives, GLP-1R/GCGR dual agonists, GLP-1/GIP dual agonists, GLP-1/GIP/GCGR tri-agonists, FGF21 derivatives, insulins, metformin, sulfonylureas, Linates, glitazones, DPP-IV inhibitors, AGLT2 inhibitors, etc., among which more specific drug types are selected from exenatide, lixisenatide, liraglutide, semaglutide, Laglutide, albiglutide, leptin, neuropeptide Y, Tirzepatide, retatrutide, Mazdutide, BI-456906, pemvidutide, cotadutide, SAR425899, efruxifermin, BIO89-100,
- the present invention provides for the combined administration of the human amylin polypeptide analog or derivative thereof with semaglutide, Tirzepatide or retatrutide for the treatment of obesity and obesity-related diseases.
- Uses including but not limited to obesity, diabetes, non-alcoholic steatohepatitis (NASH), hypertension and cardiovascular diseases, wherein the human amylin polypeptide analog or its derivatives has a structural formula such as compound 1 shown.
- the optimal dosage of the human amylin polypeptide analog or derivative thereof of the present invention will depend on the disease being treated, the severity of the disease, and the presence or absence of side effects.
- the optimal dose can be determined by routine experimentation.
- parenteral administration give 1 ⁇ g/kg to 5 mg/kg, or 5 ⁇ g/kg to 1000 ⁇ g/kg, or 10 ⁇ g/kg to 500 ⁇ g/kg, or 20 ⁇ g/kg to 100 ⁇ g/kg, or 30 ⁇ g/kg to 80 ⁇ g/kg.
- Exemplary treatment regimens may be administered once daily, once weekly, once every two weeks, once every three weeks, or once every four weeks.
- Example 1 Preparation of polypeptide sequence CNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP-NH 2 (ss cyclization) (SEQ ID No: 5)
- Peptide synthesis adopts Fmoc chemistry of solid-phase synthesis, Wang resin is used as resin, HCTU/DIEA is used as coupling reagent, DMF is used as reaction solvent, and ninhydrin detection method is used for reaction monitoring. After synthesis, the resin was washed and dried with DMF and DCM. The polypeptide was cleaved from the resin by treatment with TFA/TIPS/water (95/2.5/2.5) for 2 hours, and then precipitated with 10 times the volume of glacial methyl tertiary ether, washed, and dried to obtain the crude product. Line peptide.
- the crude linear peptide is subjected to SS cyclization reaction with iodine, and then filtered with a filter membrane to obtain the crude product. After the crude product is purified, the target product can be obtained. After liquid phase testing, as shown in Figure 1, the purity can be as high as 97%.
- the crude polypeptide was purified by semi-preparative HPLC on a C8 packing column 10*250mm packed with 10-100. Dissolve the crude product in 30 ml of 10% to 20% acetonitrile/water and inject it onto the column. Then, the column temperature is 30°C, the flow rate is 2 ml/mim, and 30% to 60% of the crude product is dissolved in 0.2% to 2% formic acid within 60 minutes. Acetonitrile gradient elution. Fractions containing the polypeptide were collected, and the purified sample was diluted and lyophilized.
- X can be L-ornithine, L-diaminobutyric acid, Dimethylalanine Aib, L-homoarginine, L-citrulline, L-diaminopropionic acid, diaminoacetic acid, D-ornithine, D-diaminobutyric acid, D-homarginine Acid, D-citrulline, D-diaminopropionic acid.
- the albumin binding residue derivatives are shown in Table 1 below.
- the preparation methods used are similar.
- the preparation process takes the synthesis steps of sample 1 as an example.
- Eicosanedioic acid 50g, 146.0mmol was suspended in acetic anhydride (200ml), heated at 140°C for 10 hours, and acetic anhydride was evaporated under reduced pressure.
- Add toluene 120 ml
- tert-butyl alcohol 50 g
- DMAP 4.1 g
- Human amylin polypeptide derivatives are shown in Table 2 below. The preparation process of each human amylin polypeptide derivative is similar, taking the synthesis steps of Compound 1 as an example.
- process 1 dissolve tert-butyleicosanedioyl-L-Glu(OtBu)-Orn-OH (19 mg) in NMP (8 ml), add HATU (8 mg) and DIEA (18 ⁇ l) respectively at 25°C. Stir for 0.5 hours to activate tert-butyleicosanedioyl-L-Glu(OtBu)-Orn-OH. Add CNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP-NH 2 (ss ring) polypeptide A (50 mg) and NMP (2 ml), and stir for 20 hours at 27°C. The reaction solution was purified to obtain modified polypeptide B, yield: 25 mg.
- modified polypeptide B The crude polypeptide was purified by semi-preparative HPLC on a 10*250mm column packed with C8 or polymer packing. Dissolve the modified polypeptide B sample in 30 ml of 10% to 20% acetonitrile/water and inject it onto the column. Then, the column temperature is 30°C, the flow rate is 2 ml/mim, and the solution is dissolved in 35% to 65% of 0.1% formic acid within 60 minutes. % acetonitrile gradient elution. Collect the fractions containing the polypeptide, dilute the purified sample and freeze-dry or drain it.
- the solid-phase synthesis method of compound 1 can also refer to the synthesis steps of SEQ ID No: 5. You only need to add more ornithine, ⁇ -glutamic acid and eicosanedioic acid to the N-terminal in order.
- the solubility of compound 1 can exceed 60 mg/ml, and no obvious fiber appears after being left for 56 hours.
- solubility of AM833 is greater than 50 mg/ml, and no obvious fiber-like appearance appears after being left for 48 hours.
- ⁇ -galactosidase ProLink TM After activation of calcitonin receptor- ⁇ -galactosidase ProLink TM (PK), intracellular ⁇ -Arrestin- ⁇ -galactosidase EA can be recruited. When two proteins with complementary functions, ⁇ -galactosidase ProLink (PK) and ⁇ -galactosidase EA, are brought into proximity, active ⁇ -galactosidase is produced. Therefore, it is possible to detect the biological activity of human amylin polypeptide derivatives by using a ⁇ -galactosidase reporter gene method introduced into CHO-K1 cells (which also express calcitonin receptors).
- CALCR-RAMP3 AMY3 CHO-K1 ⁇ -Arrestin cells were seeded into a white 96-well culture plate at a density of approximately 1 ⁇ 10 4 cells/well, and the cells were placed in 100 ⁇ l of detection medium. After incubation for 48 hours at 37°C, 5% CO2 incubator, add 10 ⁇ l/well of gradient diluted sample solution. After incubation for 1.5 hours at 37°C, 5% CO2 incubator, add 55 ⁇ l/well detection reagent and incubate for 1 hour at room temperature in the dark. Finally, the Lum module was used for detection on the microplate reader. Different drug concentrations (nM) and their response values were fitted using GraphPad for four parameters. The results are shown in Table 5 below and Figure 5.
- Calcitonin receptor and ⁇ -galactosidase reporter gene method detection results of compound 1 and AM833 show that the ⁇ -galactosidase signals generated by the two after stimulating calcitonin receptor are basically the same, EC 50 They are 6.308nM and 6.720nM respectively. Both have similar biological activities.
- the EC 50 value of compound 1 is about 6% higher than that of AM833.
- Calcitonin receptor and ⁇ -galactosidase reporter gene methods detected the results of Compound A (terminal amidation) and the terminal carboxyl group of Compound A.
- the EC 50 was 7.693nM and 417.018nM respectively. The biological activities of the two were similar. 54 times, showing that the C-terminal amidation of the polypeptide is very important for the biological activity of human amylin polypeptide derivatives.
- Biotin-labeled human serum albumin (abcam, ab8033) was diluted to 50 ⁇ g/mL, solidified with SA probe for 30 min through a macromolecule interactor (Fortebio, Octet RED96), and the peptide was diluted with NaCl gradient in 96-well black polypropylene. plate (Greiner, 655209). The solidified probe was associated with gradient diluted peptides for 60 s, followed by disassociation in NaCl for 60 s, and the operation was repeated with the unsolidified probe.
- Octet Analysis Studio 12.2 software was used for double deduction and steady-state analysis, and the binding curve and steady-state fitting curve of the polypeptide and human serum albumin were obtained ( Figure 6, Table 6).
- hCTR and empty pcDNA3.1 or hRAMP1 or hRAMP2 or hRAMP3 were simultaneously transfected with lipofectamine 3000 (Invitrogen, L3000008) and incubated for 2 sky.
- Transfection steps take 1 bottle of T75 as an example: 1. Take 750 ⁇ L Opti-MEM and 29.6 ⁇ L lipofectamine 3000 and vortex and mix; 2. Take another 750 ⁇ L Opti-MEM and mix thoroughly with 20 ⁇ g plasmid and 40 ⁇ L P3000; 3. Mix After the above two premixes are mixed, incubate at room temperature for 15 minutes; 4. Add the liposome-DNA mixture to the culture bottle and incubate for 2 days.
- Binding (%) 1-[MFI (peptide)-MFI (30 ⁇ M sCT)]/MFI (10 nM fluorescent peptide).
- Use GraphPad Prism 9 to draw and calculate IC 50 Figure 7, Table 7).
- Example 7 to construct COS-1 transient cells. Plate 3-4w cells per well in a 96-well black-walled transparent bottom ViewPlate (Corning, 3904). After overnight, discard the culture medium and use the Fluo-4NW kit. (Invitrogen, F36206) was used to stain the cells. Add 0.5% BSA to the staining working solution and incubate at 37°C for 30 minutes. The peptides were serially diluted in Greiner black polypropylene 96-well plates (Greiner, 655209) with 10 ⁇ M ATP as a positive control.
- MD FlexStation 3 was used to perform calcium flow detection, with a total reading time of 2 minutes and 30 seconds, with an average reading time of 0.9 seconds, including baseline reading of 30 seconds, and peptide injection at 30 seconds. Take the peak value of each well, subtract the baseline and vehicle, and normalize according to 10 ⁇ M ATP as 100% to obtain the final result, which is plotted and calculated through GraphPad Prism9 ( Figure 8, Table 8).
- compound 1 does not exhibit calcium ion agonism on CTR transiently transfected cells, but its calcium ion agonistic capacity on AMYR transiently transfected cells is stronger than AM833.
- mice After adaptive feeding, male SD rats were divided into 2 groups, with 6 rats in each group. Corresponding drugs were given by subcutaneous injection at 5 min, 15 min, 30 min, 1 h, 2 h, 4 h, 6 h, and 8 h before and after administration. , Collect blood at 12h, 24h, 48h, 72h, and 96h, separate the serum, and detect the drug concentration in the serum by LC-MS.
- mice After 5 days of adaptive rearing, male SD rats were divided into 8 groups, with 8 rats in each group and 1 rat in each cage. Rats in each group were given corresponding drugs via subcutaneous injection before the alternation of light and dark on the day of grouping. After the administration, a certain amount of feed was added and sufficient drinking water was provided. The animals' food intake and body weight were monitored regularly.
- Example 11 Compound 1 combined with Semaglutide efficacy test on weight loss in DIO mice
- DIO mice were purchased from Biocytogen Jiangsu Gene Biotechnology Co., Ltd. (animal production license number: SCXK (Su) 2021-0005, animal quarantine certificate number: 320726230100211516), and continued to be given D12492 high-fat feed during adaptive breeding and experiments. Feeding.
- DIO mice were randomly divided into 4 groups according to body weight: model control group (Vehicle), 1 nmol/kg Semaglutide injection group, 10 nmol/kg Compound 1, 10 nmol/kg dose of Compound 1 combined with 1 nmol/kg Semaglutide dose group, each group 8; another 8 C57BL/6 mice (Biocyto, animal production license number: SCXK (Su) 2021-0005, animal quarantine certificate number: 320726230100211613) were purchased and fed with control feed during adaptive breeding and experiments. Feed as normal control group (Control). Subsequently, each group was given medicinal solution as required, via subcutaneous injection, once a day for 2 consecutive weeks. Monitor body weight during dosing (twice/week).
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Abstract
本发明提供了一种含有非天然氨基酸的人胰淀素多肽类似物及其衍生物。通过将非天然氨基酸引入到人胰淀素的N端,并经白蛋白结合残基修饰得到的人胰淀素多肽衍生物可以有效防止酶降解,延长半衰期,并具有改进的溶解度和/或物理稳定性和/或生物利用度和/或药代药效学性质,其可用于肥胖和肥胖相关疾病的治疗用途。
Description
本发明涉及药物领域,具体涉及一种人胰淀素多肽衍生物及其医疗用途。
全球肥胖现状日益严峻,肥胖人数达12.4亿,且随着经济的快速增长和生活方式的快速变化,患病率持续增长,肥胖已成为各国家、社会及个人最主要的经济负担和最重要的公共卫生问题。肥胖患者存在许多患共病的风险,可能会危及生命,且社会代价高昂,容易引起很多并发症,例如糖尿病风险增加,心血管疾病风险的提高,引起睡眠呼吸暂停以及骨关节炎等。同时在全球新冠大爆发的时代背景下,研究证据表明肥胖和糖尿病患者感染新型冠状病毒肺炎的重症率和死亡率显著升高,由此更凸显体重管理的迫切性和重要性。
尽管全世界肥胖症的发病率很高,相关的疾病负担也很重,然而很少有药物被批准用于治疗肥胖症,目前FDA只批准了6款肥胖长期治疗药物,而且大多数的疗效有限,只能促进3%-15%左右的体重降低,这可能不足以改善一些肥胖相关的并发症,有必要开发更有效的抗肥胖药物,进一步研究新的治疗机制。
胰岛淀粉样多肽(Islet Amyloid Polypeptide,IAPP)又称胰淀素多肽(amylin),是一种与胰岛素共同分泌的糖调节胰腺激素,参与延迟胃排空和抑制餐后胰高血糖素的释放。且IAPP是一个饱胀因子,通过激活后脑区域和后脑孤束核的受体,减少能量摄入,参与调节食欲和饱腹感。还可加强肝细胞及血浆甘油三脂代谢,减少肝脏脂肪组织和脂质沉积及血浆甘油三脂波动。
人胰淀素(Human amylin,hIAPP,SEQ ID No:1)是由37个氨基酸残基组成的多肽类激素,其两端有短肽修饰,末端酰胺基及分子内二硫键对其分子生物学功能的完整有重要性。hIAPP与两个不同的受体复合物结合,这两个复合物包含降钙素受体和受体活性修饰蛋白RAMP1或RAMP3。hIAPP可通过下丘脑、腹侧被盖区和外侧被盖核在调节食物选择和偏好方面发挥作用。因此有人提出以靶向胰淀素受体(AMYR)和降钙素G蛋白偶联受体(CTR)的IAPP修饰蛋白作为体重控制的辅助治疗,并有可能与其他治疗方法(如GLP-1、瘦素等)起到补充作用。然而由于hIAPP的淀粉样蛋白原性(纤维化)、化学不稳定性和溶解性特性使其无法作为治疗剂。
普兰林肽(Pramlintide,SEQ ID No:2)是由Amylin Pharmaceuticals开发的以上市的一种糖尿病辅助治疗产品(1型和2型),对降钙素受体具有一定的亲和力,与胰淀素多肽受体有高的亲和力结合。与hIAPP相比,普兰林肽具有A25P、S28P和S29P氨基酸替换,克服了hIAPP不断增殖、不可溶的物理性质,一定程度的避免了导致自我复制、淀粉样沉积形成、B细胞凋亡,同时充分保留胰淀素的降糖作用。尽管普兰林肽具有一定优势,但它半衰期较短,每天需要注射2-3次,同时与hIAPP相同仍然存在生理pH下难溶性特征。
WO2006105527、WO2012168431、CN201280028554.1、及WO2013156594公开了具有改进的药动学或药效学(PK/PD)特性的hIAPP类似物和/或衍生物,然而目前公开的hIAPP类似物或衍生物大多存在易纤维化、溶解度差、半衰期短、药效差。相对其他公开hIAPP类似物和/或衍生物,CN201280028554.1公开的人胰淀素多肽类似物药效、成药性较优,所述人胰淀素多肽具有白蛋白结合部分,与普兰林肽相比显著延长了半衰期。该专利中“N-α-[(S)-4-羧基-4-(19-羧基十九烷酰基氨基)丁酰基]-[Glu14,Arg17,Pro37]-普兰林肽”类似物正在临床开发中,称为Cagrilintide(亦称为AM833),其多肽部分氨基酸序列如SEQ ID No:3。然而,Cagrilintide在某些条件下仍可能显示出较差的物理稳定性,仍然需要寻找具有天然hIAPP活性、体内作用时间长、稳定性好且具有更高溶解性和不易纤维化的hIAPP多肽物质。
发明概述
一方面,本发明涉及含有非天然氨基酸的人胰淀素多肽类似物,其序列如下所示:
其中,X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸;
其中,所述多肽序列中第2和第7位的两个Cys残基之间存在分子内二硫键;并且所述多肽的C末端为酰胺。
在另一实施方案中,本申请发明人意外发现,当人胰淀素多肽N端为碱性氨基酸时可以有效提高多肽的等电点,使其具有改进的溶解度和/或物理稳定性。因此,在优选实施方案中,发明人优选将非天然碱性氨基酸引入到人胰淀素的N端,例如L-鸟氨酸(L-Orn)、L-二氨基丁酸、L-高精氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸(D-Orn)、D-二氨基丁酸、D-高精氨酸或D-二氨基丙酸。
在另一优选实施方案中,本发明引入的非天然碱性氨基酸为L-鸟氨酸(L-Orn)。
在另一实施方案中,本发明提供了一种经白蛋白结合残基修饰的人胰淀素多肽衍生物,其结构式如下所示:
Y-L-Z (I)
Y-L-Z (I)
其中,Y是为白蛋白结合残基;L为接头;Z为人胰淀素多肽类似物,其序列如SEQ ID No:4所示,序列中第2和第7位的两个Cys残基之间存在分子内二硫键,并且所述多肽的C末端为酰胺;
其中,SEQ ID No:4中X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸;
其中,白蛋白结合残基通过接头与所述人胰淀素多肽N端的非天然氨基酸连接。
在另一实施方案中,所述的经白蛋白结合残基修饰的人胰淀素多肽衍生物中,其中L为接头,其可独立存在或不存在。接头可包含一个或多个氨基酸,在一个末端其与白蛋白结合部分结合,并且在另一末端与人胰淀素多肽N端非天然氨基酸上的氨基结合。
在另一实施方案中,所述的经白蛋白结合残基修饰的人胰淀素多肽衍生物中,其中Y是为白蛋白结合残基,本文所用术语“白蛋白结合残基”意指与人血清白蛋白非共价结合的残基。与人胰淀素多肽类似物连接的白蛋白结合残基通常对人血清白蛋白具有低于约10μM或甚至低于约1μM的结合亲和力。
在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物中,其中白蛋白结合残基(Y)和接头(L)部分可以统一称为取代基。在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物可包含至少一个取代基,例如1个,2个或3个。在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物优选包含1个取代基。
在另一实施方案中,白蛋白结合残基具有6-40个碳原子、8-26个碳原子或14-22个碳原子,例如16、17、18、19、20个碳原子。
在另一实施方案中,优选的白蛋白结合残基包含可在pH7.4下带负电荷的基团。
在另一实施方案中,白蛋白结合残基是选自以下的酰基:
c)CH3(CH2)rCO-*,其中r是12-20的整数;
d)HOOC(CH2)sCO-*,其中s是12-22的整数。
本发明将非天然氨基酸引入到人胰淀素的N端,可以有效防止酶降解,延长半衰期;同时,当N端优选引入非天然碱性氨基酸时,可以有效提高多肽的等电点,使其具有改进的溶解度和/或物理稳定性。
在另一实施方案中,本发明提供的人胰淀素多肽衍生物显示具有更好的溶解性,在溶液中稳定性较好,不易纤维化。并且生物学活性测定显示,本发明提供的人胰淀素多肽衍生物与Cagrilintide具有相当或更高的体外生物学活性。
在另一实施方案中,本发明提供了药物组合物,包含治疗有效量的所述人胰淀素多肽类似物或其衍生物以及药学上可接受的载体。
在另一实施中,本发明提供了将所述人胰淀素多肽类似物或其衍生物用于治疗肥胖和肥胖相关疾病的用途,所述用途包括但不限于肥胖、糖尿病、非酒精性脂肪性肝炎(NASH)、高血压和心血管疾病。在另一实施
方案中,所述药物用途包括减少食物摄取、降低食欲和/或促进体重减轻等。
本发明所述的人胰淀素多肽类似物或其衍生物还可以与一种或多种靶向药物组合使用,所述靶向药物包括但不限于糖尿病类药物、肥胖药物和高血压药物。
图1化合物A的液相图。液相结果显示化合物A的液相纯度为97%。
图2化合物A的质谱图。质谱结果确证化合物A的分子量为3824.85。
图3化合物1的液相图。液相结果显示化合物1的液相纯度为98.6%。
图4化合物1的质谱图。质谱结果确证化合物1的分子量为4392.24。
图5生物学活性测定。降钙素受体和β-半乳糖苷酶报告基因法检测化合物1和AM833的结果显示,两者在刺激降钙素受体后产生的β-半乳糖苷酶信号基本相同,EC50分别为6.308nM和6.720nM,两者具有相似的生物学活性,化合物1的EC50值约比AM833高出6%。
图6化合物1和AM833与人血清白蛋白结合的动力学分析。
图7化合物1和AM833与CTR/AMY1R/AMY2R/AMY3R瞬转COS-1细胞的浓度响应结合曲线。
图8化合物1和AM833对CTR/AMY1R/AMY2R/AMY3R瞬转COS-1细胞钙离子激动的浓度响应曲线。
图9药代动力学评价。化合物1比AM833半衰期长,生物利用度高,具有药代动力学优势。
图10药效学评价。化合物1的抑制食欲效果和减重效果与AM833相当。
图11化合物1联合Semaglutide对DIO小鼠减重药效试验。当化合物1联合Semaglutide注射后,对DIO小鼠的减重作用显著强于单药,显示联合给药有协同减重作用。
发明详述
为使本发明更易于理解,首先定义某些术语。除非另有说明,本文中所使用的科学和技术术语应具有本领域普通技术人员通常理解的含义。别的定义将在整个详述中阐明。
除非另有说明,本发明的实施将采用分子生物学(包括重组技术)、微生物学、细胞生物学、生物化学和免疫学的常规技术,这些都在本领域的技术范围内,这些技术在本领域的技术文献和通用教科书中有充分解释,诸如Molecular Cloning:A Laboratory Manual(分子克隆:实验室手册)等。
本文使用的“氨基酸”被定义为天然氨基酸和非天然氨基酸。天然氨基酸包括但不限于丙氨酸(Ala)、精氨酸(Arg)、天冬酰胺(Asn)、半胱氨酸(Cys)、谷氨酰胺(Gln)、谷氨酸(Glu)、甘氨酸(Gly)、组氨酸(His)、异亮氨酸(Ile)、亮氨酸(Leu)、苯丙氨酸(Phe)、脯氨酸(Pro)、丝氨酸(Ser)、苏氨酸(Thr和缬氨酸(Val)。
“非天然氨基酸”是指不由现有的64种遗传密码子编码的氨基酸。本文所指的非天然氨基酸包括但不限于L-鸟氨酸(L-Orn)、L-二氨基丁酸、二甲基丙氨酸(Aib)、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸(D-Orn)、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸。其结构式如下所示:
本文使用的“人胰淀素多肽”是指具有SEQ ID No:1所述序列的多肽。人胰淀素多肽(hIAPP)是由37个氨基酸残基组成的多肽类激素,在细胞内合成后与胰岛素共同储存于胰岛β细胞内的胰岛素分泌囊泡中,在胰岛β细胞响应外界刺激后共同分泌。在本文,SEQ ID No:1和人胰淀素多肽可互换使用。人胰淀素多肽(hIAPP)氨基酸序列和结构如下所示:
Lys-Cys-Asn-Thr-Ala-Thr-Cys-Ala-Thr-Gln-Arg-Leu-Ala-Asn-Phe-Leu-Val-His-Ser-Ser-Asn-Asn-Phe-Gly-Ala-Ile-Leu-Ser-Ser-Thr-Asn-Val-Gly-Ser-Asn-Thr-Tyr(SEQ ID NO:1)
本文使用的“普兰林肽”是指具有SEQ ID No:2所述序列的合成多肽。在本文,SEQ ID No:2和普兰林肽可互换使用。本文定义的普兰林肽的氨基酸序列和结构如下所示:
Lys-Cys-Asn-Thr-Ala-Thr-Cys-Ala-Thr-Gln-Arg-Leu-Ala-Asn-Phe-Leu-Val-His-Ser-Ser-Asn-Asn-Phe-Gly-Pro-Ile-Leu-Pro-Pro-Thr-Asn-Val-Gly-Ser-Asn-Thr-Tyr(SEQ ID NO:2)
本文使用的“Cagrilintide”是指具有SEQ ID No:3所述序列的合成多肽。在本文,SEQ ID No:3和Cagrilintide/AM833可互换使用。本文定义的Cagrilintide的氨基酸序列如下所示,其中第2和第7位的两个Cys残基之间存在分子内二硫键,并且所述多肽的C末端为酰胺:KCNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP(SEQ ID No:3)或Lys Cys Asn Thr Ala Thr Cys Ala Thr Gln Arg Leu Ala Glu Phe Leu Arg His Ser Ser Asn Asn Phe Gly Pro Ile Leu Pro Pro Thr Asn Val Gly Ser Asn Thr Pro(SEQ ID No:3)
本文所用序列“变体”是指在一个或多个氨基酸残基处不同于所示的序列但保留所得到的分子的生物学活性的序列。
本文使用的“多肽类似物”被定义为:如上所述的多肽一个或多个氨基酸替换和/或一个或多个缺失和/或一个或多个添加/插入。氨基酸替换修饰是指氨基酸残基被具有相似侧链或物理化学特征的氨基酸残基取代的置换,其中氨基酸可为天然或非天然氨基酸,所述氨基酸替换修饰包括但不限于肽链中赖氨酸-鸟氨酸的替换、天冬氨酸-谷氨酸的替换、缬氨酸-精氨酸的替换和酪氨酸-脯氨酸的替换。氨基酸插入、添加、缺失或取代的数量可以是至少1个,但可存在至多2个、3个、4个、5个、6个、7个、8个、9个或10个氨基酸插入、添加、缺失或取代。取代或添加可用任何天然或非天然氨基酸、合成氨基酸、拟肽或其他化合物。氨基酸残基的添加或缺失可发生在肽的N末端和/或肽的C末端。
本文使用的“人胰淀素多肽衍生物”被定义为:对上所述的多肽或类似物的氨基末端(N端)到羧基末端(C端)进行化学修饰后得到产物。化学修饰包括但不限于酰胺化、糖基化、酰化、硫酸化、磷酸化、乙酰化和环化等改变。人胰淀素多肽衍生物可包含在多肽氨基酸残基的一个或多个上的一个或多个取代基。
本文所用的术语“取代基”意指与氨基酸残基键合(特别是共价键合)的任何合适部分,特别是与氨基酸残基上的任何可用的位置键合。通常合适的部分是化学部分。取代基连接到多肽天然或非天然氨基酸上。在一些实施例中,衍生物在一个氨基酸上具有取代基,所述氨基酸残基是N端残基上的氨基酸残基。在一些实施例中,衍生物具有N端氨基酸残基上的取代,所述氨基酸残基是鸟氨酸。
本文所用术语“白蛋白结合残基”意指与人血清白蛋白非共价结合的残基。与人胰淀素多肽类似物连接的白蛋白结合残基通常对人血清白蛋白具有低于约10μM或甚至低于约1μM的结合亲和力。“白蛋白结合亲和力”可通过本领域已知的数种方法来确定,用于竞争的EC50值是化合物的亲和力的量度。已知各种白蛋白结合残基,其中有含有12-40个碳原子的线性和分支的亲脂部分、具有环戊烷并菲骨架的化合物和/或具有10-45个氨基酸残基的肽等。可通过以下文献所述的表面等离振子共振测量白蛋白结合性质:J.Biol.Chem.277(38),35035-35042,(2002)。白蛋白结合残基及亲和力测定方法在CN201280028554.1和CN201180015252.6中有详细说明,在此全部引入作为参考。
本文所用的术语“纤维化”是指多肽分子之间的物理相互作用,其导致形成寡聚体,所述寡聚体可以保持是溶解的或者是从溶液中沉淀出来的大量可见的聚集体。多肽的纤维化程度可用目测检查、色谱方法、ThT原纤维化测定(有时称为ThT原纤维生成测定)和/或浊度测量,相关方法在CN201280028554.1等中有详细说明,在此全部引入作为参考。
本文所用的术语“接头”是指将取代基与人胰淀素多肽或其类似物连接起来的任何合适的部分。所述接头可以和取代基部分(例如白蛋白结合部分)一起成为新的取代基。接头可独立存在或不存在。接头可包含一个或多个氨基酸,或者是至少一个氨基酸和胺的组合。在一个实施方案中,优选所述胺是基团OEG。接头在一个末端其与白蛋白结合部分结合,并且在另一末端与人胰淀素多肽N端非天然氨基酸上的氨基结合。
“有效量”包括足以改善或防止医学疾病的症状或病症的量。有效量还意指足以使得可以诊断或促进诊断的量。对具体受治疗者的有效量可视多种因素而变化,例如待治疗的疾病、患者的整体健康状况、给药的方法途径和剂量及副作用的严重性。有效量可为避免显著副作用或毒性作用的最大剂量或给药方案。
“药学上可接受载体”包括生理上相容的任何和全部溶剂、分散介质、包衣、抗细菌和抗真菌剂、等渗和吸收延迟剂等。优选,用于含有多肽或其衍生物的组合物的载体适用于静脉内(IV)、肌内、皮下(SC)、胃肠外、脊髓或表皮施用(例如,通过注射或输注)。
术语“受试者”或“患者”包括人和非人动物。非人动物包括所有的脊椎动物,例如哺乳动物和非哺乳动物,诸如非人灵长类、羊、犬、小鼠、大鼠、猫、牛、马、鸡、两栖类和爬行类。
人胰淀素多肽类似物及其衍生物
本发明涉及人胰淀素多肽类似物及其多肽衍生物,该衍生物通过对普兰林肽(SEQ ID No:2)进行非天然氨基酸替换和N端脂肪酸修饰,人胰淀素多肽衍生物成纤维化趋势显著降低,在水中溶解度显著增加,化合物的稳定性明显增加。同时人胰淀素多肽衍生物药代半衰期明显延长且具有良好的药效学性质,相比AM833具有相当或更高的生物学活性,可用于肥胖和肥胖相关疾病的治疗用途。
一方面,本发明涉及含有非天然氨基酸的人胰淀素多肽类似物,其序列如下所示:
其中,X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸;
其中,所述多肽序列中第2和第7位的两个Cys残基之间存在分子内二硫键;并且所述多肽的C末端为酰胺。
发明人将非天然氨基酸引入到人胰淀素的N端,可以有效防止酶降解,延长半衰期。在另一实施方案中,本申请发明人意外发现,当人胰淀素多肽N端为碱性氨基酸时可以有效提高多肽的等电点,使其具有改进的溶解度和/或物理稳定性。因此,在优选实施方案中,发明人优选将非天然碱性氨基酸引入到人胰淀素的N端,例如L-鸟氨酸(L-Orn)、L-二氨基丁酸、
L-高精氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸(D-Orn)、D-二氨基丁酸、D-高精氨酸和D-二氨基丙酸。在另一优选实施方案中,本发明引入的非天然碱性氨基酸为L-鸟氨酸(L-Orn)。碱性氨基酸结构式如下所示:
在另一实施方案中,本发明提供了一种经白蛋白结合残基修饰的人胰淀素多肽衍生物,其结构式如下所示:
Y-L-Z (I)
Y-L-Z (I)
其中,Y为白蛋白结合残基;L为接头;Z为人胰淀素多肽类似物,其序列如SEQ ID No:4所示,序列中第2和第7位的两个Cys残基之间存在分子内二硫键,并且所述多肽的C末端为酰胺;
其中,SEQ ID No:4中X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸;
其中,白蛋白结合残基通过接头与所述人胰淀素多肽N端的非天然氨基酸连接。
在另一实施方案中,所述的人胰淀素多肽衍生物中,Z的序列如SEQ ID No:4所示,其中X是非天然碱性氨基酸,非天然氨基酸可包含选自下表中所示的氨基酸。更优选的,如SEQ ID No:4所示的X是L-鸟氨酸。
在另一实施方案中,所述的经白蛋白结合残基修饰的人胰淀素多肽衍生物中,其中L为接头,其可独立存在或不存在。接头可包含一个或多个氨基酸,在一个末端其与白蛋白结合部分结合,并且在另一末端与人胰淀素多肽N端非天然氨基酸上的氨基结合。
对于一些实施方案,优选接头选自γGlu、γGlu-γGlu、γGlu-γGlu-γGlu、γGlu-γGlu-γGlu-γGlu、Glu、Glu-Glu、Glu-γGlu、Glu-Arg、Glu-Glu-Arg、His、His-His、His-γGlu、His-His-γGlu、Gly、Gly-γGlu、Ser、Ser-γGlu、D-Arg-D-Arg、Arg、Arg-Arg、Arg-Arg-γGlu、Ser-Ser、-Gly-Ser-Ser、Ser-Ser、-Gly-Ser-Ser-γGlu、
Ser-Ser-Gly-Ser-Ser-Gly、Ser-Ser-Gly-Ser-Ser-Gly-γGlu、γGlu-OEG、γGlu-2xOEG和OEG,优选接头选自γGlu、γGlu-γGlu、γGlu-OEG、γGlu-2xOEG、OEG和-NHC(O)CH2CH2CH2S(O)2NH-等。
例如,接头术语“γGlu”意指具有下列结构的氨基酸残基:
间隔基接头的另一个实例是至少一个氨基酸和胺的组合。在一个实施方案中,优选所述胺是基团OEG,其中OEG的结构式如下所示:
通过使用术语“γGlu-OEG”意指具有下列结构的部分:
通过使用术语“γGlu-OEG-OEG”意指具有下列结构的部分:
在另一实施方案中,更优选接头可选自以下的基团:
在另一实施方案中,所述的经白蛋白结合残基修饰的人胰淀素多肽衍生物中,其中Y是为白蛋白结合残基,本文所用术语“白蛋白结合残基”意指与人血清白蛋白非共价结合的残基。与人胰淀素多肽类似物连接的白蛋白结合残基通常对人血清白蛋白具有低于约10μM或甚至低于约1μM的结合亲和力。已知各种白蛋白结合残基,其中有含有12-40个碳原子的线性和分支的亲脂部分、具有环戊烷并菲骨架的化合物和/或具有10-45个氨基酸残基的肽等。可通过以下文献所述的表面等离振子共振测量白蛋白结合性质:J.Biol.Chem.277(38),35035-35042,(2002)。
在一个实施方案中,白蛋白结合残基具有6-40个碳原子、8-26个碳原子或12-22个碳原子,例如16、17、18、19、20个碳原子。
在另一实施方案中,优选的白蛋白结合残基包含可在pH7.4下带负电荷的基团。
在另一实施方案中,白蛋白结合残基是选自以下的酰基:
c)CH3(CH2)rCO-*,其中r是12-20的整数;
d)HOOC(CH2)sCO-*,其中s是12-22的整数。
在一些实施例中,白蛋白结合残基是选自CH3(CH2)rCO-的酰基,其中r为12-20的整数,更优选选自CH3(CH2)12CO-、CH3(CH2)14CO-、CH3(CH2)16CO-、CH3(CH2)18CO-、CH3(CH2)20CO-和CH3(CH2)22CO-;
一些实施例中,白蛋白结合残基进一步包含羧酸基团,例如HOOC(CH2)sCO-,其中s是12-22的整数。更优选选自HOOC(CH2)14CO-、HOOC(CH2)16CO-、HOOC(CH2)18CO-或HOOC(CH2)20CO-。
在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物中,其中白蛋白结合残基(Y)和接头(L)部分可以统一称为取代基。在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物可包含至少一个取代基,例如1个,2个或3个。在另一实施方案中,如结构式(I)所示的人胰淀素多肽衍生物优选包含1个取代基。
在本发明的实施方案中,优选的取代基对人血清白蛋白具有低于约10μM或低于约1μM的结合亲和力。优选的取代基包含可在pH7.4下带负电荷的基团。另一实施方案中,优选的取代基为:
在另一实施方案中,本发明提供了一种人胰淀素多肽衍生物,其中:
(1)所述衍生物具有如式(I)所示的结构,其中Z为如SEQ ID No:4所示人胰淀素多肽类似物,其中N端的X为鸟氨酸;
(2)所述鸟氨酸残基通过接头与白蛋白结合残基连接。
在另一实施方案中,本发明提供了一种人胰淀素多肽衍生物,其中:
(1)所述衍生物具有如式(I)所示的结构,其中Z为如SEQ ID No:4所示人胰淀素多肽类似物,其中N端的X为鸟氨酸;
(2)所述鸟氨酸残基通过接头与白蛋白结合残基连接;
(3)所述衍生物在pH7.0下具有约200μM或更高的溶解度。
在一个实施例中,本发明提供的人胰淀素多肽衍生物结构为:
在另一个实施例中,本发明提供的人胰淀素多肽衍生物结构为:
在另一个实施例中,本发明提供的人胰淀素多肽衍生物结构为:
在另一个实施例中,本发明提供的人胰淀素多肽衍生物结构为:
其中,r为12-20的整数,s为12-22的整数。
在另一个优选实施例中,本发明提供的人胰淀素多肽衍生物结构如实施例3表2中化合物1-33所示。
在特别优选的实施例中,本发明提供的人胰淀素多肽衍生物结构为:
本发明将非天然氨基酸引入到人胰淀素的N端,可以有效防止酶降解,延长半衰期;同时,当N端为碱性氨基酸,可以更有效提高多肽的等电点,使其具有改进的溶解度和/或物理稳定性。
如本发明实施例所证明的,本发明提供的人胰淀素多肽衍生物在pH7.0下具有约200μM或更高的溶解度。例如本发明实施例4条件下显示的人胰淀素多肽衍生物具有>60mg/ml的溶解度,且相比Cagrilintide(亦称为AM833)延缓了纤维化形成趋势,这显然是超出预期的。
在另一实施例中,本发明提供的人胰淀素多肽衍生物显示具有更好的物理稳定性,在溶液中稳定性较好,不易纤维化。并且生物学活性测定显示,本发明提供的人胰淀素多肽衍生物与Cagrilintide具有相当或更高的体外生物学活性。
在另一实施例中,本发明提供的人胰淀素多肽衍生物化合物1与Cagrilintide(亦称为AM833)相比,化合物1对CTR瞬转细胞未呈现钙离子激动能力、对AMYR瞬转细胞的钙离子激动能力均强于AM833,与AMY2R的结合能力略强于AM833。化合物1和AM833与人血清白蛋白的结合能力相似。
在另一实施例中,本发明提供的人胰淀素多肽衍生物比Cagrilintide(亦称为AM833)具有相当或更长的半衰期和更高的生物利用度。
在另一实施例中,本发明提供的人胰淀素多肽衍生物比Cagrilintide(亦称为AM833)具有相当或更好的抑制食欲效果和减重效果。
人胰淀素多肽类似物及衍生物的合成
本发明还涉及了用于合成所述人胰淀素多肽类似物及其衍生物的制备方法,所述方法可通过固相和/或液相方法,逐步地或通过片段组装,以及任选地分离和/或纯化最终产物的步骤。所述方法还包括在第2位和第7位的半胱氨酸侧链巯基之间,通过氧化环化形成二硫键的步骤。所述方法还包括通过重组表达、纯化和诱导手段,采用非合成方法形成C末端酰胺化的步骤。
制备的人胰淀素多肽类似物继续可通过脂肪酸侧链与多肽缩合反应得到人胰淀素多肽衍生物,任选地分离和/或纯化得到最终产物。类似的合成和纯化工艺在现有技术WO2006105527、CN201180015252.6、CN201280028554.1、WO2012168431及WO2013156594中有详细说明,在此全部引入作为参考。
药物制剂
在另一实施方案中,本发明提供了药物组合物,包含治疗有效量的所述人胰淀素多肽类似物或其衍生物以及药学上可接受的载体。
一方面,本发明提供了一种药用组合物,其包含如前所述的人胰淀素多肽类似物或其衍生物,其与药学可接受载体配制在一起。药剂学可接受载体包括任何和所有溶剂、分散介质、包衣、抗细菌和抗真菌剂、等渗和吸收延迟剂等生理学相容的载体。优选的是,载体适于静脉内、肌肉内、皮下、胃肠外、脊髓或表皮施用(例如通过注射或输注)。
药物组合物在生产和贮存条件下通常必须是无菌的和稳定的。可以将组合物配制成溶液、微乳液、脂质体或冻干粉针等剂型。在一个实施例中,药物制剂为液体制剂,可配制为溶液或混悬液。在一个实施方案中,制剂中存在的人胰淀素多肽类似物或其衍生物的浓度为约0.1mg/ml-约25mg/ml,更优选为约1mg/ml-约10mg/ml。药物直接可以以单位剂量形式提供,例如含有药物制剂的注射笔。进一步地,可以通过胃肠道外,如皮下、肌肉、静脉、经皮等。
在另一个实施例中,药物制剂为冻干制剂,在使用前由医生或护士或患者其中添加溶剂和/或稀释液。
本发明还涉及包含所述人胰淀素多肽类似物或其衍生物的药物制剂。所述药物制剂可包括药用载体、赋形剂或蛋白保护剂。本发明药物组合物的优选给药途径包括静脉内、肌肉内、皮内、腹膜内、皮下、脊髓/脊柱或其它胃肠外施用路径,例如通过注射或输注。
本发明药用组合物中的活性成分的实际剂量水平可以变化,从而获得对于特定患者、组合物和施用模式有效实现期望治疗性应答而对患者是无毒的活性成分量。“治疗有效量”的本发明人胰淀素多肽类似物或其衍生物优选导致疾病症状严重性降低、无疾病症状期的频率和持续时间提高、或对患病所造成的损害或残疾的预防。本领域普通技术人员将会能够基于诸如受试者体型大小、受试者症状的严重性、及所选择的特定组合物或施用路径的因素来确定此类量。
药物用途
本发明还涉及所述人胰淀素多肽类似物或其衍生物的药物用途。在另一实施方案中,本发明提供了治疗疾病的方法,所述方法包括将治疗有效量的所述人胰淀素多肽类似物或其衍生物给予需要治疗的受试者。
发明提供了治疗疾病的方法,所述方法包括将治疗有效量的本发明所述人胰淀素多肽类似物或其衍生物给予需要治疗的受试者。术语“受试者”包括人和非人动物。非人动物包括所有的脊椎动物,例如哺乳动物和非哺乳动物,诸如非人灵长类、羊、犬、小鼠、大鼠、猫、牛、马、鸡、两栖类和爬行类。在另一实施方案中,所述人胰淀素多肽类似物或其衍生物的施用对象或个体是哺乳动物,例如小鼠、猴子、狗、牛、马或人,优选地是人。
在另一实施方案中,本发明提供了将所述人胰淀素多肽类似物或其衍生物用于治疗肥胖和肥胖相关疾病的用途,所述用途包括但不限于肥胖、糖尿病、非酒精性脂肪性肝炎(NASH)、高血压和心血管疾病。在另一实施方案中,所述药物用途包括减少食物摄取、降低食欲、促进体重减轻。
本发明所述的人胰淀素多肽类似物或其衍生物还可以与一种或多种靶向药物组合使用,所述靶向药物包括但不限于糖尿病类药物、肥胖药物和高血压药物如GLP-1衍生物、GLP-1R/GCGR双激动剂、GLP-1/GIP双激动剂、GLP-1/GIP/GCGR三激动剂、FGF21衍生物、胰岛素类、二甲双胍、磺酰脲类、格列奈类、格列酮类、DPP-IV抑制剂、AGLT2抑制剂等,其中更具体的药物种类选自艾塞那肽、利西那肽、利拉鲁肽、司美格鲁肽、度拉糖肽、阿必鲁肽、瘦素、神经肽Y、Tirzepatide、retatrutide、Mazdutide、
BI-456906、pemvidutide、cotadutide、SAR425899、efruxifermin、BIO89-100等。
在另一优选的实施方案中,本发明提供了将所述人胰淀素多肽类似物或其衍生物与司美格鲁肽、Tirzepatide或retatrutide联合给药用于用于治疗肥胖和肥胖相关疾病的用途,所述用途包括但不限于肥胖、糖尿病、非酒精性脂肪性肝炎(NASH)、高血压和心血管疾病,其中所述的人胰淀素多肽类似物或其衍生物结构式如化合物1所示。
本发明的人胰淀素多肽类似物或其衍生物的最优剂量将取决于治疗中的疾病、疾病的严重程度,和副作用的存在与否。最优剂量可通过常规实验确定。对于胃肠外给予,给予1μg/kg-5mg/kg,或5μg/kg-1000μg/kg,或10μg/kg-500μg/kg,或20μg/kg-100μg/kg,或30μg/kg-80μg/kg人胰淀素多肽类似物或其衍生物的剂量。例示性的治疗方案可以每天施用一次、每周施用一次、每两周一次、每三周一次或每四周一次。
缩写语:
Fmoc:9H-芴-9-基甲氧羰基
tBu:叔丁基
Trt:三苯基甲基
Pbf:芴甲氧羰酰基
Boc:叔丁氧羰基
HCTU:6-氯苯并三氮唑-1,1,3,3-四甲基脲六氟磷酸酯
HATU:2-(7-偶氮苯并三氮唑)-N,N,N',N'-四甲基脲六氟磷酸酯
DIEA:N,N-二异丙基乙胺
DMF:N,N-二甲基甲酰胺
NMP:N-甲基吡咯烷酮
DCM:二氯甲烷
TFA:三氟乙酸
TIPS:三异丙基硅烷
NHS:N-羟基琥珀酰亚胺
DCC:二环己基碳亚胺
AEEA:羟乙基乙二胺
Fmoc:9H-芴-9-基甲氧羰基
tBu:叔丁基
Trt:三苯基甲基
Pbf:芴甲氧羰酰基
Boc:叔丁氧羰基
HCTU:6-氯苯并三氮唑-1,1,3,3-四甲基脲六氟磷酸酯
HATU:2-(7-偶氮苯并三氮唑)-N,N,N',N'-四甲基脲六氟磷酸酯
DIEA:N,N-二异丙基乙胺
DMF:N,N-二甲基甲酰胺
NMP:N-甲基吡咯烷酮
DCM:二氯甲烷
TFA:三氟乙酸
TIPS:三异丙基硅烷
NHS:N-羟基琥珀酰亚胺
DCC:二环己基碳亚胺
AEEA:羟乙基乙二胺
实施例1:多肽序列CNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP-NH2(s-s成环)(SEQ ID No:5)的制备
多肽合成采用固相合成的Fmoc化学,树脂采用Wang树脂,偶连试剂采用HCTU/DIEA,反应溶剂为DMF,反应监控采用茚三酮检测法。合成后树脂用DMF和DCM洗涤并干燥,多肽用TFA/TIPS/水(95/2.5/2.5)处理2小时从树脂上裂解,然后用10倍体积的冰甲叔醚沉淀、洗涤、干燥得到粗品线肽。粗品线肽用碘进行S-S成环反应,然后用滤膜过滤即可得到粗品。粗品经纯化后,即可得到目标产物,经液相测试,见图1,纯度可高达97%。经LCMS证实多肽的结构,见图2:MS(ESI):3828.3[M+H]+,957.8[M+4H]4+。
纯化方法:通过半制备型HPLC在填装有10-100的C8填料柱10*250mm上纯化粗制的多肽。将粗品溶解于30ml的10%~20%的乙腈/水中,注入到柱上,然后柱温30℃,流速2ml/mim,在60分钟期间内用0.2%~2%甲酸中30%~60%乙腈梯度洗脱。收集含有多肽的流份,将纯化的样品稀释后冻干。
SEQ ID No:4的单独序列合成可参考SEQ ID No:5的合成步骤,只需要在N端多加上1个非天然氨基酸X,X可以是L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸、D-二氨基丙酸。
实施例2:白蛋白结合残基衍生物的制备
白蛋白结合残基衍生物显示于下表1中,所使用的制备方法类似,制备工艺以样品1合成步骤为例。
样品1制备工艺:
1)、二十烷二酸单叔丁酯的制备
将二十烷二酸(50g,146.0mmol)悬浮于醋酸酐(200ml),140℃加热反应10小时,减压蒸除醋酸酐。加入甲苯(120ml),叔丁醇(50g),DMAP(4.1g),85℃反应8小时,减压蒸除溶剂。加入二氯甲烷(500ml),加入浓盐酸3ml,25℃搅拌30min,抽滤,收集有机相,用5%的盐酸水溶液(200ml*3)萃取3次,收集有机相,用无水硫酸钠(20g)干燥30min。抽滤,收集滤液后减压蒸干溶剂,加入正己烷(500ml)加热溶解,于-20℃结晶4h。过滤,收集沉淀,真空干燥至恒重,得到白色固体产物,产量:18.7g(46.7mmol,32.0%)。
1H NMR(400MHz,CDCl3)2.31(t,J=7.6Hz,2H),2.17(t,J=7.6Hz,2H),1.50-1.65(m,4),1.41(s,9),1.20-1.35(m,28).
2)、二十烷二酸琥珀酰亚胺基叔丁基酯的制备
将二十烷二酸单叔丁酯(10.03g,25.2mmol)溶解于二氯甲烷(204ml),0℃下分别加入N-羟基琥珀酰亚胺(3.03g),二环己基碳亚胺(5.70g),搅拌反应2小时,恢复至25℃搅拌12小时,抽滤,减压蒸干溶剂,加入异丙醇(90ml),过滤收集滤饼,用正己烷(34ml)洗涤滤饼,收集滤饼,减压干燥至恒重,得到白色固体产物,产量:10.28g(20.7mmol,82.1%)。
1H NMR(400MHz,CDCl3)2.81(s,4H),2.58(t,J=7.6Hz,2H),2.17(t,J=7.6Hz,2H),1.64-1.76(m,2),1.50-1.58(m,2),1.42(s,9),1.15-1.41(m,38).
3)、叔丁基二十烷二酰基-L-Glu(OtBu)-OH的制备
将二十烷二酸琥珀酰亚胺基叔丁基酯(10.28g,20.7mmol)溶解于N,N-二甲基甲酰胺(213ml),25℃下分别加入L-Glu(OtBu)-OH(4.13g),DIEA(5.3ml),升温至30℃,反应24小时。减压蒸干DMF和DIEA,冷却后,产物用乙酸乙酯(250ml)溶解,依次用0.2mol/L盐酸溶液(100ml),纯化水(100ml),饱和食盐水(100ml)萃取洗涤,收集乙酸乙酯相,用无水硫酸钠干燥,减压浓缩,真空干燥至恒重,得到黏稠油状物,产量:12.98g(粗品)。
1H NMR(400MHz,CDCl3)6.37(d,J=8.0Hz,1),4.45-4.55(m,1),2.25-2.45(m,2),2.15-2.25(m,5),1.80-1.95(m,1),1.45-1.65(m,4),1.43(s,9H),1.40(s,9H),1.20-1.25(m,28).
4)、叔丁基二十烷二酰基-L-Glu(OtBu)-NHS的制备
将叔丁基二十烷二酰基-L-Glu(OtBu)-OH(粗品,12.98g,20.7mmol)溶解于二氯甲烷(250ml),0℃下分别加入N-羟基琥珀酰亚胺(2.68g),二环己基碳亚胺(5.04g),搅拌反应2小时,恢复至25℃搅拌12小时,抽滤,减压蒸干溶剂,加入二氯甲烷(10ml),正己烷(375ml),搅拌6小时,抽滤,收集滤饼,滤饼用正庚烷(100ml)洗涤,收集滤饼,减压干燥至恒重,得到白色固体,产量:12.80g(18.8mmol,90.8%)。
1H NMR(400MHz,CDCl3)6.22(d,J=7.6Hz,1),4.50-4.60(m,1),2.81(s,4),2.65-2.75(m,1),2.30-2.50(m,1),2.24-2.35(m,1),2.13-2.22(m,4),1.98-2.10(m,1),1.45-1.70(m,4),1.45(s,9H),1.41(s,9H),1.17-1.30(m,28).
5)、叔丁基二十烷二酰基-L-Glu(OtBu)-Orn-OH的制备
将二十烷二酸琥珀酰亚胺基叔丁基酯(4.5g,6.6mmol)溶解于N,N-二甲基甲酰胺(60ml),25℃下分别加入L-Orn(Boc)-OH(1.76g),DIEA(1.78ml),升温至60℃,反应12小时。减压蒸干DMF和DIEA,冷却后,产物用乙酸乙酯(250ml)溶解,依次用纯化水(100ml),纯化水(100ml),饱和食盐水(100ml)萃取洗涤,收集乙酸乙酯相,用无水硫酸钠干燥,减压浓缩,过柱,得到黏稠油状物,产量:4.1g(5.1mmol,77.3%)。
1H NMR(400MHz,CDCl3)7.16(d,J=8.0Hz,1),6.57(d,J=8.0Hz,1),5.00(s,1),4.50-4.60(m,1),4.37-4.46(m,1),3.05-3.15(m,2),2.30-2.45(m,2),2.10-2.23(m,5),1.60-2.00(m,4),1.38-1.60(m,60).
实施例3:人胰淀素多肽衍生物(s-s成环)的制备
人胰淀素多肽衍生物显示于下表2,各人胰淀素多肽衍生物的制备工艺类似,以化合物1合成步骤为例。
化合物1制备过程:
流程1:
按照流程1,取叔丁基二十烷二酰基-L-Glu(OtBu)-Orn-OH(19mg)溶解于NMP(8ml)中,25℃下分别加入HATU(8mg),DIEA(18μl),搅拌0.5小时将叔丁基二十烷二酰基-L-Glu(OtBu)-Orn-OH活化。加入CNTATCATQRLAEFLRHSSNNFGPILPPTNVGSNTP-NH2(s-s成环)多肽A(50mg),NMP(2ml),27℃下搅拌反应20小时。反应液经纯化,得到修饰多肽B,产量:25mg。
取修饰多肽B(25mg),加入切割液1ml(TFA:TIS:H20=95:2.5:2.5),25℃下搅拌反应0.5小时,25℃减压浓缩得到粗品,粗品经纯化,得到目标化合物1,产量:17mg。
纯化方法:
修饰多肽B的纯化:通过半制备型HPLC在填装有C8或聚合物填料柱10*250mm上纯化粗制的多肽。将修饰多肽B的样品溶解于30ml的10%~20%的乙腈/水中,注入到柱上,然后柱温30℃,流速2ml/mim,在60分钟期间内用0.1%甲酸中35%~65%乙腈梯度洗脱。收集含有多肽的流份,将纯化的样品稀释后冻干或抽干。
化合物1的纯化:通过半制备型HPLC在填装有10-100的C8填料柱10*250mm上纯化粗制的多肽。将修饰多肽B的样品溶解于30ml的10%~20%的乙腈/水中,注入到柱上,然后柱温30℃,流速2ml/mim,在60分钟期间内用0.2%~2%甲酸中30%~60%乙腈梯度洗脱。收集含有多肽的流份,将纯化的样品稀释后冻干或抽干即可得到目标产物,经液相测试,见图3,纯度可高达97.9%。经LCMS证实多肽的结构,见图4:MS(ESI):1099.07[M+4H]4+。化合物1确证分子量为4392.24。
化合物1的固相合成法亦可参考SEQ ID No:5的合成步骤,只需要在N端按序多加上鸟氨酸,γ-谷氨酸和二十烷二酸。
其余化合物的制备过程均与化合物1的制备过程相似。
所述人胰淀素多肽衍生物的检测结果显示于表3。
实施例4 人胰淀素多肽衍生物溶解度和纤维化的测试
所述人胰淀素多肽衍生物在不同pH下的溶解度和纤维化情况见表4。
化合物1在pH7.0时,20℃条件下,溶解度可以超过60mg/ml,放置56h后无明显纤维样出现。AM833在PH7.0时,20℃条件下,溶解度大于50mg/ml,放置48h后无明显纤维样出现。该实验显示引入非天然氨基酸后的人胰淀素多肽衍生物在溶解度和降低纤维化程度方面类似于或者优于AM833。
实施例5 人胰淀素多肽衍生物生物学活性测定
(1)β-半乳糖苷酶测定概述
降钙素受体-β-半乳糖苷酶ProLinkTM(PK)活化后,可以募集细胞内β-Arrestin-β-半乳糖苷酶EA。当β-半乳糖苷酶ProLink(PK)和β-半乳糖苷酶EA两个功能互补的蛋白靠近时,产生有活性的β-半乳糖苷酶。因此,有可能通过使用引入到CHO-K1细胞(亦表达降钙素受体)的β-半乳糖苷酶报告基因法检测人胰淀素多肽衍生物的生物学活性。
(2)β-半乳糖苷酶检测试剂盒
使用Eurofins DiscoverX公司的
CALCR-RAMP3(AMY3)CHO-K1 β-Arrestin GPCR Assay试剂盒进行检测。
(3)β-半乳糖苷酶的测定
为进行活性测定,将CALCR-RAMP3(AMY3)CHO-K1 β-Arrestin细胞以约1×104细胞/孔的密度接种到白色96孔培养板中,将细胞置于100μl检测培养基中。在37℃,5%CO2培养箱中温育48小时后,加入10μl/孔梯度稀释的样品溶液。在37℃,5%CO2培养箱中温育1.5小时后,加入55μl/孔检测试剂并在室温下避光温育1小时。最后,在酶标仪上用Lum模块检测。不同药物浓度(nM)和其响应值采用GraphPad进行四参数拟合,结果见下表5和图5。
降钙素受体和β-半乳糖苷酶报告基因法检测化合物1和AM833的结果显示,两者在刺激降钙素受体后产生的β-半乳糖苷酶信号基本相同,EC50
分别为6.308nM和6.720nM,两者具有相似的生物学活性,化合物1的EC50值约比AM833高出6%。
降钙素受体和β-半乳糖苷酶报告基因法检测化合物A(末端酰胺化)和化合物A末端羧基的结果显示,EC50分别为7.693nM和417.018nM,两者的生物学活性相差近54倍,显示多肽C末端酰胺化对人胰淀素多肽衍生物的生物学活性非常重要。
实施例6 与人血清白蛋白结合的动力学分析(octet)
将biotin标记的人血清白蛋白(abcam,ab8033)稀释至50μg/mL,通过大分子互作仪(Fortebio,Octet RED96)用SA探针固化30min,同时用NaCl梯度稀释多肽于黑色聚丙烯96孔板(Greiner,655209)中。固化后的探针与梯度稀释的多肽association 60s,随后在NaCl中disassociation 60s,未固化的探针重复该操作。用Octet Analysis Studio 12.2软件进行双扣除后作稳态分析,得到多肽与人血清白蛋白的结合曲线和稳态拟合曲线(图6,表6)。
表6 化合物1和AM833与人血清白蛋白结合的KD值
结论:化合物1和AM833与人血清白蛋白的结合能力相似。
实施例7 与人CTR和AMYR的结合测定(FACS)
(1)COS-1瞬转细胞的构建
COS-1细胞以80%-90%的密度接种过夜后,用lipofectamine 3000(Invitrogen,L3000008)同时转染hCTR和空载pcDNA3.1或hRAMP1或hRAMP2或hRAMP3(质量比1:1),孵育2天。转染步骤(以1瓶T75为例):1、取750μL Opti-MEM与29.6μL lipofectamine 3000涡旋混匀;2、另取750μL Opti-MEM与20μg质粒和40μL P3000充分混匀;3、将上述两个预混液混匀后,室温孵育15min;4、将脂质体-DNA混合液加入培养瓶,孵育2天。
(2)FACS检测与人受体的结合
收集转染后的细胞,计数,以每孔5-10w细胞铺于低吸附96孔板,洗涤后,300g,5min离心去除上清。每孔加入梯度稀释的多肽,同时每孔包含10nM荧光多肽sCT8-32:5-FAM和0.5%w/v BSA,通过与荧光多肽的竞争结合判断样品的结合能力。以30μM sCT和10nM荧光多肽的结果定义非特异性结合。多肽与细胞避光孵育10min后,流式上机,检测FITC通道。计算公式如下:Binding(%)=1-[MFI(peptide)-MFI(30μM sCT)]/MFI(10nM荧光多肽),使用GraphPad Prism 9作图并计算IC50(图7,表7)。
表7化合物1和AM833与CTR/AMY1R/AMY2R/AMY3R瞬转COS-1细胞结合的IC50
结论:化合物1和AM833与CTR和三种AMYR的结合能力均相似,都具有浓度响应性,其中化合物1与AMY2R的结合能力略强于AM833,与AMY3R在高浓度的结合能力略弱于AM833。此外,本实施例中,化合物1在AMY1R和AMY3R都尚未出现高平台,因此无有效IC50。
实施例8 钙离子激动测定
参考实施例7进行COS-1瞬转细胞的构建,以每孔3-4w细胞铺于96孔黑壁透底ViewPlate中(Corning,3904),过夜后,弃去培养基,用Fluo-4NW试剂盒(Invitrogen,F36206)对细胞进行染色,染色工作液中加入0.5%BSA,37℃孵育30min。在Greiner黑色聚丙烯96孔板(Greiner,655209)中梯度稀释多肽,并以10μM ATP作为阳性对照。用MD FlexStation 3进行钙流检测,共读取2min 30s,平均0.9s读取一次,包含baseline读取30s,多肽在30s进样。取每孔峰值扣除baseline和vehicle,按照10μM ATP为100%进行标准化,得到最终结果,通过GraphPad Prism9作图并计算(图8,表8)。
表8 化合物1和AM833对CTR/AMY1R/AMY2R/AMY3R瞬转COS-1细胞钙离子激动的IC50
结论:本实施例中,化合物1对CTR瞬转细胞未呈现钙离子激动能力,对AMYR瞬转细胞的钙离子激动能力均强于AM833。
实施例9 人胰淀素多肽衍生物SD大鼠药代动力学试验
雄性SD大鼠经适应性饲养后,分为2组,每组6只,皮下注射给予相应药物,分别于给药前、给药后5min,15min,30min,1h,2h,4h,6h,8h,12h,24h,48h,72h,96h采血,分离血清,LC‐MS检测血清中药物浓度。
表9 主要药代动力学参数表
结论:皮下注射后,化合物1(T1/2)半衰期及暴露量(Cmax和AUC0-t)均略大于阳性对照AM833(表9)。
实施例10 人胰淀素多肽衍生物SD大鼠摄食抑制试验
雄性SD大鼠适应性饲养5天后,分为8组,每组8只,每笼1只。各组大鼠于分组当天明暗交替前经皮下注射给予相应药物,给药结束后,加入一定量的饲料,充足饮水,定期对动物的摄食量及体重进行监测。
表10‐1 SD大鼠各阶段摄食量统计表(g)
表10‐2 SD大鼠体重统计表
结论:单次皮下注射后,SD大鼠摄食量受到抑制,体重急剧下降,随后慢慢恢复,呈现一定的量效关系,相同剂量的化合物1与阳性对照AM833对大鼠的摄食量和体重影响基本一致(表10,图10)。
实施例11:化合物1联合Semaglutide对DIO小鼠减重药效试验
DIO小鼠购自百奥赛图江苏基因生物技术有限公司(动物生产许可证编号:SCXK(苏)2021‐0005,动物检疫合格证编号:320726230100211516),适应性饲养及实验期间继续给予D12492高脂饲料饲喂。DIO小鼠根据体重随机分为4组:模型对照组(Vehicle),1nmol/kg的Semaglutide注射液组,10nmol/kg化合物1,10nmol/kg剂量的化合物1联合1nmol/kg Semaglutide剂量组,每组8只;另采购8只C57BL/6小鼠(百奥赛图,动物生产许可证编号:SCXK(苏)2021‐0005,动物检疫合格证编号:320726230100211613)在适应性饲养及实验期间给予对照饲料饲喂作为正常对照组(Control)。随后各组按照应给予药液,皮下注射给药,1次/日,连续2周。给药期间监测体重(2次/周)。
结果:本次实验中,DIO小鼠连续皮下注射给药2周(1次/日),10nmol/kg的化合物1和1nmol/kg Semaglutide对DIO小鼠体重均有较明显的减重效果。当化合物1联合Semaglutide注射后,对DIO小鼠的减重作用显著增强,显示联合给药有协同减重作用(图11)。
上文描述了本发明的主旨、优选实施方案和实施模式。然而,本发明不应被解释为仅限于上述特定的实施方案。而是应将此处描述的实施方案认为是例示性的而不是限制性的,他人在不背离本发明范畴情况下作出的变更和变化应在本发明权利要求技术方案的保护范围内。
序列表信息:
Claims (37)
- 一种含有非天然氨基酸的人胰淀素多肽类似物,其序列如下所示:
XCNTATCATQ RLAEFLRHSS NNFGPILPPT NVGSNTP(SEQ ID No:4)其中,X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸、D-二氨基丙酸;其中,所述多肽序列中第2和第7位的两个Cys残基之间存在分子内二硫键;并且所述多肽的C末端为酰胺。 - 根据权利要求1所述的人胰淀素多肽类似物,其特征在于:所述序列SEQ ID No:4中第一位的X为非天然碱性氨基酸L-鸟氨酸(L-Orn)。
- 一种经白蛋白结合残基修饰的人胰淀素多肽衍生物,其结构式如下所示:
Y-L-Z (I)其中,Y为白蛋白结合残基;L为接头;Z为人胰淀素多肽类似物,其序列如SEQ ID No:4所示,序列中第2和第7位的两个Cys残基之间存在分子内二硫键,并且所述多肽的C末端为酰胺;其中,SEQ ID No:4中X是非天然氨基酸,独立选自L-鸟氨酸、L-二氨基丁酸、二甲基丙氨酸Aib、L-高精氨酸、L-瓜氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸、D-二氨基丁酸、D-高精氨酸、D-瓜氨酸或D-二氨基丙酸;其中,白蛋白结合残基通过接头与所述人胰淀素多肽N端的非天然氨基酸连接。 - 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述序列SEQ ID No:4中X是非天然碱性氨基酸,选自L-鸟氨酸(L-Orn)、L-二氨基丁酸、L-高精氨酸、L-二氨基丙酸、二氨基乙酸、D-鸟氨酸(D-Orn)、D-二氨基丁酸、D-高精氨酸和D-二氨基丙酸。
- 根据权利要求4所述的人胰淀素多肽衍生物,其特征在于:所述序列SEQ ID No:4中X是L-鸟氨酸(L-Orn)。
- 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述的人胰淀素多肽衍生物中,其中L为接头,其可独立存在或不存在。
- 根据权利要求6所述的人胰淀素多肽衍生物,其特征在于:所述接头可包含一个或多个氨基酸,在一个末端其与白蛋白结合部分结合,并且在另一末端与人胰淀素多肽N端非天然氨基酸上的氨基结合。
- 根据权利要求7所述的人胰淀素多肽衍生物,其特征在于:所述接头选自γGlu、γGlu-γGlu、γGlu-γGlu-γGlu、γGlu-γGlu-γGlu-γGlu、Glu、Glu-Glu、Glu-γGlu、Glu-Arg、Glu-Glu-Arg、His、His-His、His-γGlu、His-His-γGlu、Gly、Gly-γGlu、Ser、Ser-γGlu、D-Arg-D-Arg、Arg、Arg-Arg、Arg-Arg-γGlu、Ser-Ser、-Gly-Ser-Ser、Ser-Ser、-Gly-Ser-Ser-γGlu、Ser-Ser-Gly-Ser-Ser-Gly、γGlu-2xOEG、OEG、Ser-Ser-Gly-Ser-Ser-Gly-γGlu、γGlu-OEG和-NHC(O)CH2CH2CH2S(O)2NH-。
- 根据权利要求8所述的人胰淀素多肽衍生物,其特征在于:所述接头选自以下的基团:a)b)c)
d)
e)
- 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基具有6-40个碳原子、8-26个碳原子或12-22个碳原子。
- 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基具有16、17、18、19、20、21或22个碳原子。
- 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基包含可在pH7.4下带负电荷的基团。
- 根据权利要求3所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基是选自以下的酰基:c)CH3(CH2)rCO-*,其中r是12-20的整数;d)HOOC(CH2)sCO-*,其中s是12-22的整数。
- 根据权利要求13所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基是选自CH3(CH2)rCO-的酰基,其中r为12-20的整数,其选自CH3(CH2)6CO-、CH3(CH2)8CO-、CH3(CH2)10CO-、CH3(CH2)12CO-、CH3(CH2)14CO-、CH3(CH2)16CO-、CH3(CH2)18CO-、CH3(CH2)20CO-和CH3(CH2)22CO-;
- 根据权利要求13所述的人胰淀素多肽衍生物,其特征在于:所述的白蛋白结合残基为包含羧酸基团的形如HOOC(CH2)sCO-的酰基,其中s是12-22的整数,其选自HOOC(CH2)12CO-、HOOC(CH2)14CO-、HOOC(CH2)16CO-、HOOC(CH2)18CO-或HOOC(CH2)20CO-。
- 根据权利要求13所述的人胰淀素多肽衍生物,其特征在于:如结构式(I)所示的人胰淀素多肽衍生物可包含至少一个取代基,例如1个,2个或3个。
- 根据权利要求16所述的人胰淀素多肽衍生物,其特征在于:如结构式(I)所示的人胰淀素多肽衍生物优选包含1个取代基。
- 根据权利要求16所述的人胰淀素多肽衍生物,其特征在于:所述的取代基为:
- 根据权利要求3-18任一项所述的人胰淀素多肽衍生物,其中:(1)所述衍生物具有如式(I)所示的结构,其中Z为如SEQ ID No:4所示人胰淀素多肽类似物,其中N端的X为鸟氨酸;(2)所述鸟氨酸残基通过接头与白蛋白结合残基连接。
- 根据权利要求19所述的人胰淀素多肽衍生物,其特征在于:所述衍生物在pH7.0下具有约200μM或更高的溶解度。
- 根据权利要求19所述的人胰淀素多肽衍生物,其特征在于:所述的人胰淀素多肽衍生物结构为:
其中,r为12-20的整数。 - 根据权利要求19所述的人胰淀素多肽衍生物,其特征在于:所述的人胰淀素多肽衍生物结构为:
其中,r为12-20的整数。 - 根据权利要求19所述的人胰淀素多肽衍生物,其特征在于:所述的人胰淀素多肽衍生物结构为:
其中,s为12-22的整数。 - 根据权利要求19所述的人胰淀素多肽衍生物,其特征在于:所述的人胰淀素多肽衍生物结构为:
其中,s为12-22的整数。 - 根据权利要求3-18任一项所述的人胰淀素多肽衍生物,其特征在于: 所述的人胰淀素多肽衍生物结构为:
- 药物组合物,其包含治疗有效量的如权利要求1-2任一项所述人胰淀素多肽类似物或如权利要求3-25任一项所述的人胰淀素多肽衍生物以及药学上可接受的载体。
- 根据权利要求26所述的药物组合物,其特征在于:所述组合物配制成溶液、微乳液、脂质体或冻干粉针等剂型。
- 根据权利要求27所述的药物组合物,其特征在于:所述组合物适于静脉内、肌肉内、皮下、胃肠外、脊髓或表皮施用给药。
- 如权利要求1-2任一项所述人胰淀素多肽类似物或如权利要求3-25任一项所述的人胰淀素多肽衍生物在治疗肥胖和肥胖相关疾病中的用途。
- 根据权利要求29所述的用途,其特征在于:所述用途中的疾病包括但不限于肥胖、糖尿病、非酒精性脂肪性肝炎(NASH)、高血压和心血管疾病。
- 根据权利要求29所述的用途,其特征在于:所述药物用途包括减少食物摄取、降低食欲和/或促进体重减轻。
- 根据权利要求29所述的用途,其特征在于:所述的人胰淀素多肽类似物或其衍生物还可以与一种或多种靶向药物组合使用,所述靶向药物包括但不限于糖尿病类药物、肥胖药物和高血压药物。
- 根据权利要求32所述的用途,其特征在于:所述的糖尿病类药物、肥胖药物和高血压药物选自GLP-1衍生物、GLP-1R/GCGR双激动剂、GLP-1/GIP双激动剂、GLP-1/GIP/GCGR三激动剂、FGF21衍生物、胰岛素类、二甲双胍、磺酰脲类、格列奈类、格列酮类、DPP-IV抑制剂、AGLT2抑制剂等。
- 根据权利要求33所述的用途,其特征在于:所述的糖尿病类药物、肥胖药物和高血压药物选自艾塞那肽、利西那肽、利拉鲁肽、司美格鲁肽、度拉糖肽、阿必鲁肽、Tirzepatide、retatrutide、Mazdutide、BI-456906、pemvidutide、cotadutide、SAR425899、efruxifermin、BIO89-100、瘦素、神经肽Y等。
- 人胰淀素多肽类似物或其衍生物与司美格鲁肽、Tirzepatide或retatrutide联合给药用于用于治疗肥胖和肥胖相关疾病的用途,所述用途包括但不限于肥胖、糖尿病、非酒精性脂肪性肝炎(NASH)、高血压和心血管疾病,其中所述的人胰淀素多肽类似物或其衍生物结构式如化合物1所示。
- 根据权利要求29所述的用途,其特征在于:所述的药物给药剂量为1μg/kg-5mg/kg,或5μg/kg-1000μg/kg,或10μg/kg-500μg/kg,或20μg/kg-100μg/kg,或30μg/kg-80μg/kg。
- 根据权利要求29所述的用途,其特征在于:所述的药物治疗方案可以每天施用一次、每周施用一次、每两周一次、每三周一次或每四周一次。
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US20100222269A1 (en) * | 2007-09-11 | 2010-09-02 | Novo Nordisk A/S | Improved derivatives of amylin |
CN104086655A (zh) * | 2013-04-02 | 2014-10-08 | 北京康华源科技发展有限公司 | 胰淀素样融合蛋白及其编码基因与应用 |
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CN109863168A (zh) * | 2016-09-09 | 2019-06-07 | 西兰制药公司 | 胰淀素类似物 |
WO2022129526A1 (en) * | 2020-12-18 | 2022-06-23 | Novo Nordisk A/S | Co-agonists of the glp-1 and amylin receptors |
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US20100222269A1 (en) * | 2007-09-11 | 2010-09-02 | Novo Nordisk A/S | Improved derivatives of amylin |
CN104086655A (zh) * | 2013-04-02 | 2014-10-08 | 北京康华源科技发展有限公司 | 胰淀素样融合蛋白及其编码基因与应用 |
US20160272693A1 (en) * | 2015-03-18 | 2016-09-22 | Zealand Pharma A/S | Amylin analogues |
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