WO2020158691A1 - 肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体 - Google Patents
肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体 Download PDFInfo
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- 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
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention relates to a modified product of hepatocyte growth factor or an active fragment thereof with polyethylene glycol.
- Hepatocyte growth factor is a growth factor having various pharmacological actions. In addition to the initially found hepatocyte growth action, anti-apoptotic action, angiogenic action, vasodilatory action, anti-organ fibrosis action, anti-epithelial action. It is known to have a mesenchymal transition effect and the like, and clinical application to various diseases has been attempted.
- Non-Patent Document 1 since the half-life of hepatocyte growth factor in vivo is as short as about 30 minutes, it is suggested that a large amount of hepatocyte growth factor must be frequently administered to sustain its pharmacological action ( Non-Patent Document 1). On the other hand, since hepatocyte growth factor has liver tropism, it has been reported that, when administered in a large amount, it induces liver hypertrophy due to hepatocyte growth as a side effect (Non-Patent Document 2).
- Non-Patent Document 3 reports NK1 consisting of an N domain and kringle 1
- Non-Patent Document 4 reports NK2 consisting of an N domain and kringle 1 and kringle 2.
- Non-Patent Document 5 reports NK4 consisting of N domain and kringle 1, kringle 2, kringle 3 and kringle 4 as active fragments produced by recombinant technology, and these active fragments are in vitro and in In vivo, it has been reported to have an agonist activity or an antagonist activity to c-Met which is a receptor tyrosine kinase of hepatocyte growth factor receptor. Further, it has been reported that NK1 has liver tropism and induces liver hypertrophy in vivo (Non-patent documents 3 and 6).
- Patent Documents 1 and 2 Polyethylene glycol modified forms of hepatocyte growth factor and NK4, which is one of its active fragments, have been reported mainly for the purpose of extending the in vivo half-life.
- Polyethylene glycol which is a highly biocompatible polymeric polymer, is widely used as a modifier for the purpose of extending the in vivo half-life of proteins and reducing their immunogenicity.
- a modified product obtained by directly chemically modifying hepatocyte growth factor with a plurality of polyethylene glycols can achieve the effect of prolonging the half-life in vivo of hepatocyte growth factor, while reducing its physiological activity by 30% or more. It is reported in Patent Document 1.
- Non-Patent Document 7 Pseudomonas aeruginosa-derived exotoxin A was chemically modified with polyethylene glycol via a protease-sensitive peptide for 3C protease derived from rhinovirus for the purpose of experimentally controlling drug-derived toxicity. Prodrugs have been reported.
- Non-Patent Document 7 functional verification in vivo and ex vivo of a prodrug of exotoxin A, which is a toxin protein derived from Pseudomonas aeruginosa, has not been carried out.
- the prodrug of exotoxin A disclosed in Non-Patent Document 7 is polyethylene glycol via a protease-sensitive peptide at the end of exotoxin A and at two positions in the middle of the sequence in order to suppress the physiological activity of exotoxin A.
- Non-Patent Document 7 lacks generality and cannot be easily applied to other proteins.
- Non-Patent Document 7 does not disclose or suggest a prodrug of a hepatocyte growth factor or an active fragment thereof, and a prodrug of the hepatocyte growth factor or an active fragment thereof for the purpose of reducing liver tropism. There is no disclosure or suggestion of in vivo protease that can be used for design.
- the hepatic tropism derived from hepatocyte growth factor or its active fragment can be reduced, and the physiological activity of hepatocyte growth factor or its active fragment can be selectively expressed in target disease tissues other than liver tissue. There is a need to create variants of factors or active fragments thereof.
- an object of the present invention is to provide a modified form of hepatocyte growth factor or an active fragment thereof that solves the above problems.
- hepatocyte growth factor or an active fragment thereof is chemically modified with polyethylene glycol via a protease-sensitive peptide to obtain hepatocyte growth factor or the same. It was found that the liver tropism derived from an active fragment can be reduced, and that the physiological activity of hepatocyte growth factor or an active fragment thereof can be selectively expressed by cleavage of a protease-sensitive peptide in a target disease tissue, and the present invention It came to completion.
- the present invention includes the following (1) to (7).
- a medicine comprising the polyethylene glycol modified product according to any one of (1) to (6) as an active ingredient.
- the polyethylene glycol modified form of hepatocyte growth factor or its active fragment of the present invention reduces the hepatic tropism originally possessed by hepatocyte growth factor or its active fragment, and selectively hepatocytes in target disease tissues such as kidneys.
- the growth factor or its active fragment can express the physiological activity and exert its pharmacological action.
- FIG. 3 is a diagram showing the expression levels of enzyme activity of ADAM17 protein in kidney tissue and liver tissue of kidney disease model mice and normal mice. It is a figure which shows the expression level of ADAM17 protein in the kidney tissue and liver tissue of a kidney disease model mouse and a normal mouse.
- A shows a Western blotting image for the ADAM17 protein
- (b) is a figure in which the band intensity is quantified.
- human NK1 release which is an active substance from prodrug-ized human NK1 by protease treatment.
- FIG. 2 is a diagram showing reduction in HGF activity of human NK1 by prodrug formation of protease-sensitive peptide-added human NK1.
- FIG. 6 shows the release of human NK1 which is an active form from tissue-selective prodrug-containing human NK1.
- FIG. 3 shows in vivo tissue-selective physiological activity of prodrug-containing human NK1. It is a figure which shows the comparison of the activity control of human NK1 prodrug by the difference of a polyethylene glycol modification site.
- the polyethylene glycol modified form of hepatocyte growth factor or an active fragment thereof (hereinafter, also referred to as HGF or PEG modified form of its active fragment) according to the present invention is one molecule of hepatocyte growth factor (HEPATOCYTE GROWTH FACTOR, hereinafter, HGF).
- HGF hepatocyte growth factor
- Polyethylene glycol (hereinafter, also referred to as PEG) is covalently bonded to the ends (amino terminal, carboxyl terminal) of the active fragment or the active fragment thereof via a protease-sensitive peptide.
- One embodiment of the PEG-modified form of HGF or an active fragment thereof according to the present invention is one or a plurality of molecules of PEG at the end (amino terminal or carboxyl terminal) of HGF or an active fragment thereof via a protease-sensitive peptide. Are covalently bonded. At that time, there is no particular limitation on the binding mode between the end of the HGF or the active fragment thereof and the protease-sensitive peptide, and both may be bound directly or optionally via a spacer sequence. ..
- the binding mode between the protease-sensitive peptide and the PEG is not particularly limited, and the PEG may be directly bound to the protease-sensitive peptide, or the PEG may be bound via an amino acid artificially added to the protease-sensitive peptide. And may further contain a protease-sensitive peptide for purification and a tag sequence for purification between the protease-sensitive peptide and the artificially added amino acid or the like.
- the terminal of HGF or an active fragment thereof is covalently bonded to the carboxyl terminal of a protease-sensitive peptide
- PEG is covalently bonded to the amino terminal of the protease-sensitive peptide, or the end of HGF or an active fragment thereof is connected to the amino terminal of a protease-sensitive peptide.
- Covalently bound to the carboxy-terminal of the protease-sensitive peptide and PEG covalently bound to the carboxy-terminal of the protease-sensitive peptide, and the end of HGF or an active fragment thereof is covalently bonded to the amino-terminal of the protease-sensitive peptide.
- PEG is covalently bonded are preferable.
- HGF or its active fragment is responsible for the dimerization and liver-directing function of HGF or its active fragment, which is important for controlling the physiological activity of HGF or its active fragment.
- one molecule of PEG is covalently bonded to the amino terminus of HGF or its active fragment via a protease-sensitive peptide, and the amino acid of HGF or its active fragment is preferred.
- the carboxyl terminal of the protease-sensitive peptide is covalently bonded to the terminal and one molecule of PEG is covalently bonded to the amino terminal of the protease-sensitive peptide, and the amino terminal of HGF or its active fragment is ADAM17-sensitive peptide or thrombin-sensitive. It is further preferable that the carboxyl terminus of the peptide is covalently bound, and further one molecule of PEG is covalently bound to the amino terminus of the ADAM17-sensitive peptide or the thrombin-sensitive peptide, and the amino terminus of NK1 which is one of the active fragments of HGF.
- the carboxyl terminus of the ADAM17-sensitive peptide or the thrombin-sensitive peptide is covalently bound, and that one molecule of PEG having a number average molecular weight of 20,000 to 100,000 is covalently bound to the amino-terminus of the ADAM17-sensitive peptide or the thrombin-sensitive peptide.
- one molecule of PEG having a 4-branched type and a number-average molecular weight of 70,000 to 90,000 is covalently bonded to the amino terminal of the ADAM17-sensitive peptide or the thrombin-sensitive peptide.
- An arbitrary spacer sequence can be added between HGF or its active fragment and the protease-sensitive peptide in order to control the efficiency of cleavage by protease.
- HGF ⁇ HGF and its active fragment> HGF is composed of N domain, kringle 1, kringle 2, kringle 3, kringle 4 and SPH domain from the amino terminal side, and N domain, kringle 1, kringle 2, kringle 3 and kringle 4 constitute an ⁇ chain, and SPH domain Constitutes the ⁇ chain.
- HGF is biosynthesized as a single-chain pro-HGF at the time of expression, but when the secretory signal sequence is removed at the time of secretion, extracellularly, 494th arginine residue and 495th arginine residue from the initiation methionine are extracellularly extracted.
- HGF active HGF having physiological activity.
- HGF has various pharmacological actions such as hepatocyte proliferation action, anti-apoptosis action, angiogenesis action, vasodilation action, anti-organ fibrosis action and anti-epithelial mesenchymal transition action.
- HGF is a receptor type tyrosine of HGF receptor. It is known to be induced by binding to the kinase c-Met. By binding HGF to c-Met, a plurality of tyrosine residues inside the cell of c-Met are phosphorylated, and a signal molecule is bound to the phosphorylated tyrosine residue, whereby the signal pathway is activated. At that time, Y1234/1235 is known as a particularly important phosphorylation site.
- a secretory signal is produced when it is biosynthesized and secreted as a secretory protein consisting of 728 amino acid residues (including a secretory signal sequence (31 amino acid residues from the initiation methionine)) (GenBank accession number: M29145). It becomes a protein consisting of 697 amino acid residues with the sequence removed (SEQ ID NO: 1).
- the above HGF has not only the same amino acid sequence as the amino acid sequence of naturally-occurring HGF (hereinafter, also referred to as natural HGF), but also one or several amino acids lacking in the amino acid sequence of natural HGF.
- An HGF having an amino acid sequence that has been deleted, substituted or added (or inserted) and that has a physiological activity as HGF and further includes a HGF in which a sugar chain portion of natural HGF is modified, and It also includes HGF having no sugar chain portion.
- As the amino acid variant of HGF a variant having 90% or more sequence identity with the amino acid sequence of natural HGF is preferred, a variant having 95% or more sequence identity is more preferred, and 98% or more sequence identity. A mutant having sex is more preferable.
- HGF amino acid variants of HGF
- examples of amino acid variants of HGF include, for example, HGF in which 5 amino acid residues in kringle 1 are deleted (naturally occurring naturally occurring variants, hereinafter also referred to as defective HGF) (Kinosaki M. et al., FEBS. Letters, Vol. 434, 1998, pp. 165-170), which has been reported to have higher specific activity than human HGF (SEQ ID NO: 1) in certain cell types.
- Conservative amino acid substitution generally refers to substitution between amino acids having similar chemical properties, electrical properties (or polarity/hydrophobicity), or structural properties. Such a substitution can suppress a significant change in the three-dimensional structure (conformation) of a polypeptide containing native HGF, and thus the polypeptide can retain its activity without significantly impairing it. In some cases it may be more active than the native form.
- Specific examples of such amino acid substitutions include substitutions between acidic amino acids (eg, aspartic acid (D) and glutamic acid (E)), substitutions between basic amino acids (eg, histidine (H), lysine (K) and arginine (R).
- substitution between aromatic amino acids eg phenylalanine (F), tyrosine (Y) and tryptophan (W)
- substitution between hydrophilic amino acids eg cysteine (C), aspartic acid (D), glutamic acid (E)
- H Histidine
- K lysine
- N glutamine
- Q arginine
- R serine
- S serine
- T threonine
- substitution between hydrophobic amino acids eg alanine (A), phenylalanine) (F), isoleucine (I), leucine (L), norleucine (Nle), methionine (M), valine (V), tryptophan (W) and tyrosine (Y)
- hydrophobic amino acids eg alanine (A), phenylalanine) (F), isoleucine (I), leucine (L), norleucine (Nle), methionine (M), valine (V), tryptophan (W) and tyrosine (Y)
- the above HGF also includes a recombinant HGF produced by gene recombination technology based on the amino acid sequence or base sequence of natural HGF.
- sequence identity refers to the identity between two sequences that can be determined using algorithms such as BLAST, FASTA, etc., and generally refers to two sequences, including gaps or When aligned so that the maximum degree of coincidence is achieved without including a gap, it can be calculated as a percentage (%) of the number of matched amino acids with respect to the total number of amino acids (including the gap) (Altschul S. et al., Journal of Molecular). Biology, 1990, Volume 215, No. 3, p. 403-410; Altschul S. et al., Nucleic Acids Research, 1997, Volume 25, No. 17, p. 3389-3402).
- the active fragment of HGF includes a part of the structure of HGF, binds to c-Met, and acts as an antagonist to c-Met or a protein that exhibits physiological activity (agonist activity) as HGF (antagonist). Protein that exerts its activity.
- HGF active fragment examples include NK1 or NK2, which is a natural splicing variant of HGF, or NK4 produced by a recombinant technique.
- NK1 consists of the amino-terminal N domain of HGF and kringle 1
- NK2 consists of the amino-terminal N domain of HGF, kringle 1 and kringle 2. It has been reported that each of these acts as an agonist or an antagonist to c-Met in vivo (Jakubczak JL et al., Molecular and Cellular Biology, Volume 18, No. 3, 1998, p. 1275-1283; Otsuka T. et al., Molecular and Cellular Biology, Volume 20, No.
- NK1 has liver tropism and induces liver hypertrophy in vivo (Jakubczak JL et al., Molecular and Cellular Biology, 1998, Vol. 18, No. 3, p. .1275-1283; Ross J. et al., Gastroenterology, 2012, Volume 142, p.897-906).
- NK4 consists of an amino-terminal N domain of HGF, kringle 1, kringle 2, kringle 3 and kringle 4, and is reported to act as an antagonist to c-Met (Date K. et al., FEBS Letters. , Vol. 420, No. 1, 1997, p.1-6).
- the active fragment of HGF described above is not only the one having the same amino acid sequence as the amino acid sequence derived from natural HGF, but one or several amino acids are deleted, substituted, or substituted in the amino acid sequence derived from the amino acid sequence of natural HGF.
- a variant having an added amino acid sequence and exhibiting physiological activity (agonist activity) as HGF or antagonist activity to c-Met is also included, and the sugar chain portion derived from natural HGF is modified. Or a mutant having no sugar chain moiety derived from natural HGF is also included.
- the variant of the active fragment of HGF is preferably a variant having 90% or more sequence identity with the amino acid sequence derived from natural HGF, more preferably a variant having 95% or more sequence identity, and more than 98% or more.
- 1K1 Lietha D. et al., The EMBO Journal, 2001, Volume 20, No. 20, p. 5543-5555
- M2.2 Jones DS 2nd. Proceedings of the National Academia of Sciences of the United States of America, 2011, Volume 108, No. 32, p. 13035-13040.
- the HGF or its active fragment contained in the PEG-modified form of HGF or its active fragment according to the present invention includes natural HGF (including mutants such as defective HGF), NK1 (including mutant), NK2 (mutant). Or NK4 (including mutants), preferably NK1 (including mutants) or NK2 (including mutants), and more preferably NK1 (including mutants). More preferably, human NK1 consisting of the amino acid sequence represented by SEQ ID NO: 2 is most preferable. The amino acid sequence represented by SEQ ID NO: 2 does not include a human HGF-derived secretory signal sequence (MWVTKLLPALLLQHVLLHLLLLLPIAIPYAAEG: SEQ ID NO: 3).
- the above HGF or its active fragment includes an amino acid sequence derived from a mammal, preferably an amino acid sequence derived from a human, a cat or a dog, and more preferably an amino acid sequence derived from a human.
- HGF or its active fragment for example, by using a known gene recombination technique, a nucleic acid sequence (DNA) encoding HGF or its active fragment is designed, transiently or stably introduced into cells, and expressed. Can be obtained.
- DNA nucleic acid sequence
- HGF or its active fragment and the protease-sensitive peptide 1 to 20 amino acids may be added as a spacer sequence using a known gene recombination technique.
- DNA nucleic acid sequence
- nucleic acid sequence (DNA) encoding a spacer sequence arbitrarily selected is added, and further, a nucleic acid sequence (DNA) encoding a protease-sensitive peptide is continuously added, and the nucleic acid sequence is transiently or stably introduced into cells. , Can be obtained by expressing.
- amino acids examples include aspartic acid (D), glutamic acid (E), histidine (H), lysine (K), arginine (R), phenylalanine (F), tyrosine (Y), tryptophan ( W), alanine (A), cysteine (C), asparagine (N), glutamine (Q), serine (S), threonine (T), isoleucine (I), leucine (L), norleucine (Nle), methionine ( M), valine (V) and tryptophan (W).
- the spacer sequence to be used is appropriately selected in consideration of the cleavage efficiency of the protease-sensitive peptide and the efficiency of controlling the activity of HGF or its active fragment by PEG modification.
- the protease-sensitive peptide used in the present invention means a peptide whose expression is recognized in target disease tissues other than liver tissue and which is cleaved by a protease whose expression in liver tissue is relatively low.
- the protease corresponding to the protease-sensitive peptide changes the relative difference in the enzyme activity required by the target diseased tissue of interest, and therefore the relative enzyme between the liver tissue and the target diseased tissue is analyzed by a method such as Western blotting or immunohistostaining. It is necessary to evaluate the difference in activity and select the appropriate one.
- the target disease tissue is kidney tissue as one form thereof
- the relative difference in enzyme activity in kidney tissue with respect to enzyme activity in liver tissue needs to be 3 times or more, and is 10 times or more. Is preferred, and a protease that is 100 times or more is more preferred.
- the above-mentioned PEG-modified form of HGF or an active fragment thereof according to the present invention is chemically modified with PEG in liver tissue by selecting the above-mentioned protease-sensitive peptide. Since the activity of HGF is diminished and the liver tropism is reduced, it can be expected to reduce the side effects of HGF or its active fragment in liver tissues, while in target disease tissues, proteases corresponding to these protease-sensitive peptides It is expected that the release of HGF or its active fragment and the expression of its physiological activity are expected by being cleaved by and released from PEG. A fragment of the protease-sensitive peptide cleaved by the corresponding protease may remain in HGF or its active fragment.
- proteases that are expressed in target disease tissues other than liver tissues include, for example, ADAM17 (Melenhorst WB et al., American Journal of Physiology, 2009, which is reported to be expressed in the kidneys of patients with renal disease. 297, No. 3, p. 781-790), Hepatocyte growth factor activator (HGFA), and its upstream factor thrombin (David CJH. et al., American Journal of Physiology 15, 2001, 2001, Vol. No. 4, p1383-1393) or Matrix MetalloProtease (Junwei Y. et al., The Journal of Clinical Investigation, 2002, Volume 110, pp. 1525-1538).
- ADAM17 Monhorst WB et al., American Journal of Physiology, 2009, which is reported to be expressed in the kidneys of patients with renal disease. 297, No. 3, p. 781-790
- HGFA Hepatocyte growth factor activator
- thrombin David
- ADAM17 After being synthesized as an inactive precursor in cells, ADAM17 is cleaved by Furin to be a mature form, which shows the activity of cleaving various proteins (Aldo B. et al., Journal of BiologoChemistry, 2003, Volume 278, p. 25933-25939; Belen S. J. et al., Journal of Biological Chemistry, 2007, Volume 282, p. 8325-8331). Unless otherwise specified herein, ADAM17 refers to a mature ADAM17.
- the protease-sensitive peptide contained in the PEG-modified form of HGF or an active fragment thereof according to the present invention is an existing in vivo peptide whose cleavage by a corresponding protease has been reported, or an artificial peptide produced by gene recombination technology. Can be used.
- Protease sensitive peptides are selected for stability, cleavage efficiency in target tissues and cross-species. Since it was found by the present inventors that the expression of ADAM17 and thrombin in liver tissue is relatively lower than that in target disease tissues other than liver tissue, the protease-sensitive peptide is ADAM17-sensitive peptide or thrombin-sensitive peptide. Is preferred.
- the ADAM17 sensitive peptide means a peptide cleaved by ADAM17
- the thrombin sensitive peptide means a peptide cleaved by thrombin.
- examples of bio-indigenous peptides include those derived from TNF-alpha (SPLAQAVRSSSR, SEQ ID NO: 8) or those derived from L-selectin (QETNRSFSK, SEQ ID NO: 10).
- examples of artificial peptides include Artificial ADAM-17 cleavable sequence (PRAAAVKSP, SEQ ID NO: 9) (Caesu Cl, et al., Biochemical Journal, 2009, Vol. 424, p. 79-88).
- peptides having the amino acid sequences represented by SEQ ID NOS: 8 to 16 are preferable, and peptides having the amino acid sequence represented by SEQ ID NO: 9 are more preferable.
- examples of in vivo peptides include those derived from Prothorombin (FNPRTFGS, SEQ ID NO: 19) or those derived from HGFA (LRPRIIGG, SEQ ID NO: 20).
- an Artificial Thrombin cleaveable sequence TFLPPRGVRLG, SEQ ID NO: 17 and TFPPRSFLG, SEQ ID NO: 18) (Maike G. et al., PLoS ONE, 2012, Volume 7, p.E31756-31771; The Journal of Neuroscience, 2012, Volume 32, No. 22, p. 7622-7631).
- the thrombin-sensitive peptide is preferably a peptide having the amino acid sequence represented by SEQ ID NOs: 17 to 20, more preferably a peptide having the amino acid sequence represented by SEQ ID NO: 17.
- protease-sensitive peptides can be used. By using a protease-sensitive peptide having different cleavage activities for the same protease or a combination of protease-sensitive peptides for different proteases, it becomes possible to chemically modify multiple sites with PEG and control the cleavage activity. ..
- a known gene recombination technique is used to design a nucleic acid sequence (DNA) encoding a protease-sensitive peptide sequence in succession with a nucleic acid sequence (DNA) encoding HGF or an active fragment thereof, It can be obtained as HGF or an active fragment thereof to which a protease-sensitive peptide has been added by transiently or stably introducing into and expressing.
- the above-mentioned protease-sensitive peptide may have an artificial sequence such as a tag sequence added for the purpose of purification or the like.
- the tag sequence include 6 ⁇ His tag, HAT tag, c-Myc tag, FLAG tag, DYKDDDDD tag, Strep tag, HA tag, GST tag and MBP tag.
- a protease-sensitive peptide for purification in addition to the protease-sensitive peptide, a protease-sensitive peptide for purification, a spacer sequence for purification, etc. It is also possible to insert a sequence between the protease sensitive peptide and the tag sequence.
- HGF or an active fragment thereof to which a protease-sensitive peptide is added which is obtained by purification and removal of a tag sequence, includes a cleavage fragment of a protease cleavage peptide for purification or a sequence such as a spacer sequence for purification. May be.
- the above-mentioned protease-sensitive peptide may have a natural amino acid such as cysteine or a non-natural amino acid such as azidophenylalanine inserted for the purpose of PEG modification and the like.
- the insertion of the above amino acid into the protease-sensitive peptide is carried out by using, for example, a known gene recombination technique, to insert a nucleic acid sequence (DNA) encoding an amino acid to be added continuously with a nucleic acid sequence (DNA) encoding the protease-sensitive peptide sequence. It can be carried out by designing, transiently or stably introducing into cells, and expressing.
- the insertion site of the amino acid for the purpose of PEG modification and the like is preferably the terminal (amino terminal or carboxyl terminal) of the protease-sensitive peptide.
- the above-mentioned protease-sensitive peptide is a known gene recombination technique between the protease-sensitive peptide and an artificial sequence such as a tag sequence for the purpose of purification or an amino acid inserted for the purpose of PEG modification.
- the spacer sequence used may have 1 to 20 amino acids added thereto.
- a protease-sensitive peptide in which a spacer sequence is added between a protease-sensitive peptide and an artificial sequence such as a tag sequence for the purpose of purification or an amino acid inserted for the purpose of PEG modification is, for example, a known gene recombination.
- a nucleic acid sequence (DNA) encoding a spacer sequence that is arbitrarily selected is continuously added to a nucleic acid sequence (DNA) encoding a protease-sensitive peptide, and a tag sequence for the purpose of continuous purification, etc. It can be obtained by inserting an artificial sequence or an amino acid for the purpose of PEG modification or the like, and transiently or stably introducing into a cell and expressing.
- amino acids examples include aspartic acid (D), glutamic acid (E), histidine (H), lysine (K), arginine (R), phenylalanine (F), tyrosine (Y), tryptophan ( W), alanine (A), cysteine (C), asparagine (N), glutamine (Q), serine (S), threonine (T), isoleucine (I), leucine (L), norleucine (Nle), methionine ( M), valine (V) and tryptophan (W).
- the optionally added spacer sequence is preferably added to the terminal of the protease-sensitive peptide, and the amino-terminal of the protease-sensitive peptide added to the amino-terminal of HGF or its active fragment is added to the carboxyl-terminal of the spacer sequence.
- an amino acid inserted for the purpose of PEG modification or an artificial sequence such as a tag sequence for the purpose of purification or the like is added to the amino terminus of the spacer sequence.
- the spacer sequence is appropriately selected in consideration of the cleavage efficiency of a protease-sensitive peptide and the efficiency of controlling the activity of HGF or its active fragment by PEG modification.
- PEG is a highly biocompatible polymeric polymer containing water-soluble poly(ethylene oxide).
- the PEG used for preparing the PEG-modified form of HGF or an active fragment thereof according to the present invention those known in the art can be used.
- the repeating unit structure "-(CH 2 CH 2 O) n -" is included, and the structure of the end groups or the entire PEG can be varied as described below.
- “—CH 2 CH 2 —O(CH 2 CH 2 O) n —CH 2 CH 2 —” and “—(OCH 2 CH 2 ) n O—” are included depending on whether the terminal oxygen atom is substituted or not. obtain.
- the PEG used for preparing the PEG-modified form of HGF or an active fragment thereof according to the present invention is end-capped, and specific examples thereof include a functional group (eg, maleimide) having a reactive one end of PEG.
- the base is capped with.
- the other end of PEG may be capped, or may be modified, for example, by introducing a hydroxyl group in order to enhance hydrophilicity.
- PEG having a branched structure at least one end may be capped with a reactive functional group such as the above maleimide group, and each end of the other branched chain may be modified. Good.
- a PEG-terminal in order to chemically modify HGF having a protease-sensitive peptide added thereto or an active fragment thereof with PEG, a PEG-terminal has a functional group so as to exhibit covalent reactivity with HGF having a protease-sensitive peptide added thereto or an active fragment thereof.
- Activated PEG can be used.
- the structure of PEG contained in the PEG-modified form of HGF or its active fragment according to the present invention is not particularly limited, and there is no problem with a linear structure or a branched structure, but the hepatic directivity of HGF or its active fragment is reduced. It is preferable that the compound has a branched structure in terms of the effect.
- Examples of the PEG having a branched structure include 2-branched PEG, 3-branched PEG, and 4-branched PEG, and the number of branches also includes more, but among them, 4-branched PEG. Is preferred.
- a two-branched, three-branched or four-branched structure from the end of the linker moiety up to the functional group a structure in which a PEG chain further branches from a PEG chain branched from the end of the linker moiety up to the functional group, A structure in which the PEG chain is branched from the end of the linker portion up to the functional group and in the middle of the linker portion can be mentioned, and the number average molecular weight of each branched PEG chain may be the same or different.
- a structure in which the PEG chain is branched into two from the functional group linker part and the PEG chain is further branched into two from the branched PEG chain is preferable, and the PEG chain is branched into two parts from the functional group linker part.
- the structure having a total of four PEG chains of the same number average molecular weight, in which the PEG chain is further branched from the branched PEG chain of 2, is most preferable.
- the PEG having the most preferable structure for example, SUNBRIGHT GL4-800MA (NOF CORPORATION) manufactured by Yuka Sangyo Co., Ltd. may be mentioned.
- the preferred embodiment relating to the structure of PEG and the preferred embodiment relating to the number average molecular weight of PEG can be arbitrarily combined.
- PEG having a structure having a total of four PEG chains having an average molecular weight and having a number average molecular weight of 70,000 to 90,000 can be mentioned.
- PEG can be synthesized by a ring-opening polymerization of ethylene oxide according to a commercially available product, or a known method or a method similar thereto (Sandler and Karo, Polymer Synthesis, Academic Press, New York, Volume 3, p. 138-). 161).
- the number average molecular weight of PEG contained in the PEG-modified form of HGF or an active fragment thereof according to the present invention is preferably 20,000 to 100,000, more preferably 40,000 to 100,000, and further preferably 60,000 to 100,000 to reduce HGF activity. 70,000 to 90,000 is most preferable. It is known that the effect of prolonging the in vivo half-life of proteins by chemical modification of PEG correlates with the number average molecular weight of PEG (Sundqvist T. et al., Computers and Biomedical Research, 1988, vol. 21). , No. 2, p. 110-116), generally, if the number average molecular weight is 20,000 or more, a sufficient effect of prolonging the half-life in vivo can be expected.
- terminal-activated PEG examples include N-hydroxysuccinimide ester, nitrobenzene sulfonate ester, maleimide, orthopyridyl disulfide, vinyl sulfone, iodoacetamide, carboxylic acid, azide, phosphine, or amine structure-activated PEG. These are commercially available products or can be synthesized according to known methods.
- examples of PEG activated by various reactive functional groups include SUNBRIGHT (registered trademark, NOF CORPORATION) series of Yuka Sangyo Co., Ltd.
- a reactive functional group added to the PEG terminal so as to exhibit covalent reactivity with HGF or an active fragment thereof to which a protease-sensitive peptide is added is simply referred to as “functional group”, and these reactive functional groups are used as terminals.
- the PEG possessed is described as "PEG activated by a functional group”.
- the functional group is appropriately selected depending on the modification site. For example, for an amino group, selective modification is possible by using an N-hydroxysuccinimide (NHS) ester group as the functional group.
- NHS N-hydroxysuccinimide
- the thiol group present in the side chain of the cysteine residue can be selectively modified with a maleimide group as a functional group.
- the side chain of glutamic acid and the carboxyl group present at the carboxyl terminal can be modified with an amino group or the like.
- an azido group contained in an unnatural amino acid such as azidophenylalanine can be selectively modified by using triallylphosphine.
- HGF or an active fragment thereof to which a protease-sensitive peptide chemically modified with PEG is added is subjected to a covalent bond reaction between PEG and the protease-sensitive peptide.
- the functional group generated by the above may be contained, and for example, in the case of a covalent bond reaction between a thiol group contained in cysteine and a maleimide group, a succinimide group is contained.
- HGF or its active fragment preferred embodiments of HGF or its active fragment
- preferred embodiments of protease-sensitive peptide preferred embodiments of PEG can be combined arbitrarily.
- PEG is covalently bonded to the terminal (amino terminal, carboxyl terminal) of HGF or its active fragment via a protease-sensitive peptide.
- the production method include a method in which HGF or an active fragment thereof to which a protease-sensitive peptide is added is covalently bound to PEG.
- HGF or an active fragment thereof and a protease-sensitive peptide can be expressed as a single protein without preparing them separately.
- HGF or an active fragment thereof to which a protease-sensitive peptide is added can be expressed by the gene recombination technique described below.
- a nucleic acid sequence (DNA) containing an arbitrary spacer sequence is present between HGF or its active fragment and a protease-sensitive peptide, or a protease-sensitive peptide and an artificial sequence such as a tag sequence for the purpose of purification or PEG modification, etc.
- a spacer sequence can also be added by designing such that the amino acid inserted for the purpose of and the amino acid inserted in sequence are continuously added.
- the protease-sensitive peptide-added HGF or an active fragment thereof for example, a protease-sensitive peptide-added HGF obtained by expressing the protease-sensitive peptide-added state using a gene recombination technique, or It is preferable to use the active fragment.
- the protease-sensitive peptide is preferably directly bonded to the amino terminus of HGF or its active fragment, and the carboxyl terminus of the protease-sensitive peptide is preferably directly bonded to the amino terminus of HGF or its active fragment.
- HGF or an active fragment thereof to which a protease-sensitive peptide is added can be carried out by using a known method, for example, ion exchange, gel filtration, a method such as chromatography using a hydrophobic carrier or an affinity carrier, Alternatively, by unreacted HGF or an active fragment thereof, PEG having a functional group activated or a by-product, HGF added with a protease-sensitive peptide or an active fragment thereof is purified or concentrated.
- HGF or its active fragment is extracted from tissues, protein synthesis using gene recombination technology, biological production using recombinant cells expressing HGF or its active fragment (or natural cells expressing HGF), etc. It can also be obtained using a known method of. Further, as HGF or its active fragment, commercially available HGF or its active fragment can also be used.
- NK1 is one of the active fragments of HGF using a known gene recombination technique. It can be obtained by expressing NK1 by transiently or stably introducing into a cell a nucleic acid sequence (DNA) encoding NK1 which is
- the DNA can be obtained by selecting and extracting from a cDNA library prepared from human tissues or cells and subjecting it to a DNA amplification method such as PCR method.
- the DNA can be chemically synthesized using, for example, a DNA synthesizer utilizing the phosphoramidite method.
- an expression vector contains elements such as regulatory sequences necessary for expressing (and, if necessary, secreting) the DNA.
- elements include a translation initiation codon and a termination codon, a promoter, an enhancer, a terminator, a ribosome binding site (or Shine-Dalgarno sequence), a selectable marker sequence, a signal sequence, etc., and necessary elements are inserted into a vector.
- a suitable promoter is selected depending on the host cell.
- a promoter suitable for cells of the bacterium of the genus Escherichia which is a prokaryote is, for example, trp promoter, lac promoter, recA promoter, ⁇ P L promoter, etc.
- Suitable promoters for Bacillus bacterium cells are, for example, SPO1 promoter, SPO2 promoter, penP promoter and the like.
- Suitable promoters for yeast cells are, for example, PHO5 promoter, PGK promoter, GAP promoter, ADH promoter, AOX promoter and the like.
- a suitable promoter for plant cells is, for example, the cauliflower mosaic virus (CaMV) promoter.
- Suitable promoters for insect cells are eg P10 promoter, polyhedrin promoter and the like.
- Suitable promoters for mammalian cells include, for example, Rous sarcoma virus, poliomer virus, chicken head virus, adenovirus, bovine papilloma virus, avian sarcoma virus, cytomegalovirus (SMV), simian virus 40 (SV40), vaccinia virus and the like.
- Examples include viral promoters, merothionine promoters, heat shock promoters, and the like.
- the selection marker includes, for example, HIS3 gene, LEU2 gene, TRP1 gene, URA3 gene, dihydrofolate reductase gene (methotrexate (MTX) resistance), ampicillin resistance gene, neomycin resistance gene, kanamycin resistance gene and the like.
- a vector suitable for the host cell is selected, and for example, plasmids, phages, cosmids, viral vectors, artificial chromosomes (eg BAC, YAC, etc.) are usually used vectors.
- the prokaryotic vector include Escherichia coli-derived plasmids such as pCR-based plasmids, pBR-based plasmids and pUC-based plasmids, and Bacillus subtilis-derived plasmids such as pUB110, pTP5 and pC194.
- the yeast vector is a yeast-derived plasmid, such as pSH-based plasmid.
- the plant cell vector is a binary vector or the like.
- vectors for mammalian cells include commercially available vectors such as pBK-CMV, pcDNA3.1, pZeoSV (Invitrogen, Stragene), and viral vectors (eg, adenovirus, adeno-associated virus, poxvirus, herpes simplex virus, lentivirus). , Sendai virus, vaccinia virus, SV40, etc.).
- vectors for mammalian cells include commercially available vectors such as pBK-CMV, pcDNA3.1, pZeoSV (Invitrogen, Stragene), and viral vectors (eg, adenovirus, adeno-associated virus, poxvirus, herpes simplex virus, lentivirus). , Sendai virus, vaccinia virus, SV40, etc.).
- host cells include prokaryotic cells such as Escherichia coli and Bacillus subtilis, and eukaryotic cells such as yeast, plant cells and animal cells (eg mammalian cells, insect cells).
- prokaryotic cells such as Escherichia coli and Bacillus subtilis
- eukaryotic cells such as yeast, plant cells and animal cells (eg mammalian cells, insect cells).
- Examples of the method for binding HGF or an active fragment thereof to which a protease-sensitive peptide is added and PEG include, for example, covalently binding HGF or an active fragment thereof to which a protease-sensitive peptide is added and PEG activated by a functional group.
- a method in other words, a method of chemically modifying HGF or an active fragment thereof to which the above-mentioned protease-sensitive peptide is added with PEG activated by a functional group.
- the amino acid contained in the protease-sensitive peptide, or cysteine or an unnatural amino acid artificially introduced into the protease-sensitive peptide for example, An amino group, a thiol group, a carboxyl group, an azido group, or the like contained in azidophenylalanine
- a known gene recombination technique can be used for the chemical modification of HGF or an active fragment thereof to which the above protease-sensitive peptide is added by PEG (US Pat. No. 4,917,888 and International Publication No. 1987/00056, International Publication No. 1999).
- the thiol group present in the side chain of the cysteine residue has intramolecular and intermolecular disulfide groups. Since no bond is formed, it is possible to carry out site-selective chemical modification of the thiol group with PEG having a maleimide group as a functional group.
- the protease-sensitive peptide can be labeled with biotin in cells using a known biotin-ligase expression system (Avidity), and can be used as a site for chemical modification with PEG by utilizing the interaction with avidin.
- a known biotin-ligase expression system Avidity
- an amino acid (natural type or non-natural type) that selectively reacts with a functional group is artificially inserted into the end of a protease-sensitive peptide that is added to the end (amino terminal or carboxyl terminal) of HGF or its active fragment.
- Purification or concentration of a PEG-modified form of HGF or an active fragment thereof according to the present invention can be carried out by a known method after chemically modifying with PEG via a protease-sensitive peptide.
- a protease-sensitive peptide For example, unreacted HGF or an active fragment thereof or a PEG in which a functional group is activated by a method such as ion exchange, gel filtration, chromatography using a hydrophobic carrier or an affinity carrier, or a combination thereof, or The product can be removed to purify or concentrate the PEG-modified form of HGF or an active fragment thereof.
- the PEG-modified form of HGF or an active fragment thereof according to the present invention is not only expected to have an effect of extending the in vivo half-life due to PEG modification, but is also included in the above-mentioned PEG-modified form in a target disease tissue expressing a specific protease.
- a target disease tissue expressing a specific protease.
- the physiological activity of the above-mentioned PEG-modified form of HGF or its active fragment can be easily measured using cultured cells.
- the pharmacological action of natural HGF such as c-Met phosphorylation inducing action, cell proliferation action, cell migration action and anti-apoptosis action can be used as an index (Rubin JS. et al., The Journal of Biological Chemistry). , 2001, Vol. 276, No. 35, p. 32977-32983; Lietha D. et al., The EMBO Journal, 2001, Volume 20, No. 20, p. 5543-5555; Liu Y. et al., American Journal. of Physiology, 1999, Vol. 277, No. 4, p. 624-633).
- the release behavior of HGF or its active fragment which is an active substance from the above-mentioned PEG-modified product of HGF or its active fragment is conveniently determined, for example, by using the molecular weight change between the PEG modified product and the active substance by SDS electrophoresis as an index. It is possible to measure.
- the in vivo half-life of the above-mentioned PEG-modified form of HGF or its active fragment is calculated, for example, by measuring the blood concentration when intravenously, intraperitoneally, subcutaneously or intradermally administered to a model animal. it can. In particular, it can be easily measured by radiolabeling the above-mentioned PEG-modified form of HGF or its active fragment.
- the medicament containing the PEG-modified form of HGF or its active fragment as an active ingredient is a disease in which the pharmacological action of HGF or its active fragment can be utilized (acute inflammatory disease, chronic inflammatory disease, acute ischemic disease or chronic Can be used for the treatment of ischemic diseases, etc.).
- a specific disease for example, amyotrophic lateral sclerosis, organ fibrosis, diabetes, spinal cord injury, peritoneal adhesion, transplantation treatment, wound healing, neuropathic pain and the like can be used.
- the protease-sensitive peptide is an ADAM17-sensitive peptide
- the liver where side effects of HGF or its active fragment are concerned.
- It can be used as a therapeutic or prophylactic agent for a disease (for example, renal fibrosis) that develops in an organ (for example, kidney) where ADAM17 expression is high.
- a disease for example, renal fibrosis
- an organ for example, kidney
- ADAM17 expression for example, kidney
- a disease associated with an organ in which the expression level of ADAM17 is increased due to a lesion and the expression level is higher than that in the liver can also be used as a therapeutic agent for the disease.
- the above-mentioned medicament can be used as a useful therapeutic drug for mammals (eg, mouse, rat, hamster, rabbit, dog, cat, monkey, cow, sheep or human), especially human.
- mammals eg, mouse, rat, hamster, rabbit, dog, cat, monkey, cow, sheep or human
- the above medicament is used as a useful therapeutic drug for humans
- the above HGF or its active fragment is preferably based on the amino acid sequence derived from human HGF.
- the PEG-modified form of the above-mentioned HGF or its active fragment which is an active ingredient may be administered orally or parenterally as it is or in combination with a pharmaceutically acceptable carrier. it can. It is preferably administered by subcutaneous, intramuscular or intravenous injection.
- Examples of dosage forms for oral administration of the above-mentioned medicaments include tablets, pills, capsules, granules, syrups, emulsions or suspensions, which can be produced by known methods. It may contain a carrier or excipient normally used in the field of formulation and, if necessary, an additive. Carriers and excipients for tablets include, for example, lactose, maltose, saccharose, starch or magnesium stearate. Examples of the additives include binders, disintegrants, preservatives, delayed release agents, colorants, flavors, stabilizers, solubilizers, thickeners, emulsifiers and the like.
- the dosage form for parenteral administration of the above-mentioned pharmaceuticals includes, for example, injections, eye drops, ointments, poultices, suppositories, nasal absorbents, pulmonary absorbents, transdermal absorbents or local sustained-release agents. And these can be produced by known methods.
- the solution formulation is, for example, a PEG-modified form of HGF or an active fragment thereof as an active ingredient, which is dissolved in a sterile aqueous solution used for injection or suspended and emulsified in an extract, and then embedded in a liposome. It can be prepared in the state.
- a solid preparation can be prepared, for example, as a lyophilized product by adding mannitol, trehalose, sorbitol, lactose, glucose or the like as an excipient to the above-mentioned PEG-modified form of HGF or its active fragment which is an active ingredient. Further, it can be used in the form of powder. Further, these powders may be mixed with polylactic acid, glycolic acid or the like to be solidified and used.
- the gelling agent is prepared, for example, by dissolving the above-mentioned PEG-modified form of HGF or an active fragment thereof as an active ingredient in a thickener such as glycerin, PEG, methylcellulose, carboxymethylcellulose, hyaluronic acid or chondroitin sulfate, or a polysaccharide. can do. Further, the above-mentioned additives can be added to the preparation, if necessary.
- a thickener such as glycerin, PEG, methylcellulose, carboxymethylcellulose, hyaluronic acid or chondroitin sulfate, or a polysaccharide.
- the above-mentioned drug is appropriately determined according to the age, body weight of the patient, target disease, symptoms, administration form, administration route, molecular weight of PEG, etc., but generally 0.001 mg to 100 mg/kg/dose , Preferably 0.01 mg to 10 mg/kg/dose once/month to once/day, preferably once/month to once/week.
- the above-mentioned drugs may be used in appropriate amounts in combination or in combination with other drugs in order to supplement or enhance the therapeutic or prophylactic effect or reduce the dose.
- the PEG-modified form of HGF or an active fragment thereof according to the present invention is a cell containing a PEG-modified form of HGF or an active fragment thereof by utilizing the morphogenesis-inducing action of HGF or its active fragment. It can be used as a differentiation promoting inducer.
- the cells include epithelial cells and neural stem cells.
- Example 1 Expression of human NK1 with a protease-sensitive peptide: To the amino terminus of human NK1 from which the secretory signal sequence has been removed, a protease-sensitive peptide was added from its carboxyl terminus (SEQ ID NO: 9 as ADAM17-sensitive peptide, SEQ ID NO: 17 as thrombin-sensitive peptide), and 6 ⁇ was added to the amino terminus of the protease-sensitive peptide.
- a His-tag and a cysteine residue were sequentially added (that is, CHHHHHH (SEQ ID NO: 4) was added to the protease-sensitive peptide) to prepare a DNA encoding human NK1 by artificial synthesis (Fasmac Co.), and an expression vector was used. It was inserted into a certain Cold-shock promoter/pCold IV (Takara Bio). The prepared expression plasmid was introduced into E. coli SHuffle T7 Express (New England Biolabs) as a host.
- a protease-sensitive peptide was added to the carboxyl terminus of human NK1 from which the secretory signal sequence was removed (SEQ ID NO: 9 as an ADAM17-sensitive peptide) at the carboxyl terminus of the human NK1.
- a DNA encoding human NK1 to which XHis tags were sequentially added that is, HHHHHHC (SEQ ID NO: 5) was added to the protease-sensitive peptide was also introduced into the gene.
- protease-sensitive peptide that is, an ADAM17-sensitive peptide or a thrombin-sensitive peptide
- human NK1 to which a 6 ⁇ His tag and a cysteine residue are added in the order represented by SEQ ID NO: 4 or 5 is generically referred to as a protease-sensitive peptide. It is described as peptide-added human NK1.
- the above-mentioned Escherichia coli was applied to LB agar medium containing kanamycin sulfate or carbenicillin, cultured at 37°C for 18 to 22 hours, and then subjected to the first stage selective culture.
- the obtained colonies were inoculated into LB medium containing kanamycin sulfate or carbenicillin, cultured, and subjected to second stage selective culture. This culture solution was used as a seed culture solution.
- the seed culture solution was kanamycin sulfate or carbenicillin, 0.8% Glucose, 0.7% Glycerol, 2% Bacto-Tryptone, 1% Casamino Acid, 1% Yeast Extract, 100 mmol/L Potassium Phosphate, 10 mmol/L MgSO 4 and 0. It was cultivated in a culture medium containing 0.5% NaCl. A glass flask or a mini jar fermenter was used for the culture. After confirming that the turbidity of the culture solution increased to an appropriate value, Cold-Shock was applied at 15°C or lower. IPTG was added to the culture solution at the same time as Cold-Shock. After 1.5 to 3 hours from Cold-Shock, the culture was terminated, the culture solution was collected, and centrifugation was performed to obtain a precipitate of Escherichia coli expressing the protease-sensitive peptide-added human NK1.
- Example 2 Purification of Protease Sensitive Peptide-Added Human NK1: From the Escherichia coli precipitation obtained in Example 1, protease-sensitive peptide-added human NK1 was purified by the following method.
- the E. coli precipitate expressing the protease-sensitive peptide-added human NK1 obtained in Example 1 was suspended in 50 mmol/L Tris-HCl, 5 mmol/L EDTA, 150 mmol/L NaCl, 10 mmol/L CaCl 2 , 10 mmol/L MgCl 2. After crushing using a high pressure type table homogenizer (Niro Soavi), the crushed liquid was cleaned by centrifugation.
- the protease-sensitive peptide-attached human NK1 was bound to the heparin carrier by passing the Escherichia coli lysate that had been centrifugally cleaned through a heparin carrier (HiTrap Heparin; GE Healthcare) that had been equilibrated with PBS( ⁇ ) in advance. Subsequently, a buffer in which the NaCl concentration contained in PBS( ⁇ ) was changed in the concentration range of 150 mmol/L to 2000 mmol/L was passed through in ascending order of NaCl concentration to obtain each elution fraction. Each elution fraction was subjected to SDS electrophoresis to confirm the elution fraction of human NK1 with a protease-sensitive peptide.
- a nickel carrier (cOmplete (registered trademark, Roche Diagnostics Co., Ltd.) His-Tag Purification Resin; Roche) equilibrated in advance with 300 mmol/L NaCl-containing PBS (-) was obtained by heparin resin purification.
- the protease-sensitive peptide-added human NK1 was bound to the resin by passing through the elution fraction of the protease-sensitive peptide-added human NK1.
- a buffer prepared by adding imidazole (concentration range of 0 mmol/L to 500 mmol/L) to PBS ( ⁇ ) containing 500 mM NaCl was passed through the imidazole in ascending order of concentration to obtain each elution fraction.
- Each elution fraction was subjected to SDS electrophoresis to confirm the elution fraction of human NK1 with a protease-sensitive peptide.
- prodrug human NK1 Human NK1 in which one molecule of PEG is covalently bound to the amino-terminal cysteine residue or the carboxyl-terminal cysteine residue of human NK1 to which one molecule of protease-sensitive peptide is added (hereinafter referred to as prodrug-human NK1) ) was synthesized by the following method.
- the protease-sensitive peptide-added human NK1 obtained in Example 2 was subjected to solvent substitution with 300 mmol/L NaCl, 2 mmol/L EDTA-containing 100 mmol/L phosphate buffer (pH 6.0), and the molar ratio to the protease-sensitive peptide-added human NK1 was changed. Then, PEG activated with a functional group was added so that the ratio became 40 times. PEG was covalently bound to the protease-sensitive peptide-added human NK1 by incubating at 25° C. overnight to synthesize a prodrug human NK1.
- Examples of the PEG activated by the above functional group include SUNBRIGHT GL2-400MA (two-branched type, number average molecular weight 40000, oil chemistry industry), SUNBRIGHT ME-400MA (linear type, number average molecular weight 40000, oil chemistry industry) and SUNBRIGHT GL4-800MA (4-branched type, number average molecular weight 80,000, Yuka Sangyo Co., Ltd.) was used.
- Human NK1 having an ADAM17-sensitive peptide (SEQ ID NO: 9) added to the amino terminus was chemically modified with the above-mentioned three types of PEGs (hereinafter, generically referred to as ADAM17-cleaving prodrug-human NK1.
- Human NK1 in which the ADAM17-sensitive peptide (SEQ ID NO: 9) was added to the carboxyl terminus was chemically modified with PEG having a 4-branched type and a number average molecular weight of 80,000.
- Human NK1 having a thrombin-sensitive peptide (SEQ ID NO: 17) added to the amino terminus was chemically modified with PEG having a bifurcated type and a number average molecular weight of 40,000 (hereinafter, thrombin-cleaved prodrug human NK1).
- the reaction solution containing the prodrug-modified human NK1 was diluted 10-fold with NaCl-free PBS(-), and then passed through an ion exchange carrier (SP-Sepharose 6 Fast Flow; GE Healthcare), and the solution was removed from the solution.
- the PEG with the functional group of the reaction activated was removed.
- the prodrug human NK1 adsorbed on the ion-exchange carrier was eluted with 1.0 mol/L NaCl-containing PBS(-), and then passed through a heparin carrier (Heparin-Sepharose Fast Flow; GE Healthcare) to collect a pass-through liquid.
- Example 4 Measurement of purity of prodrug-modified human NK1 and contamination rate of protease-sensitive peptide-added human NK1: The purity of the prodrug-modified human NK1 and the contamination rate of the precursor protease-sensitive peptide-added human NK1 that was not chemically modified with PEG were measured by reverse phase chromatography using high performance liquid chromatography.
- Reversed-phase column (Intrada WP-RP; Imtakt) was connected to high performance liquid chromatography (LC-10AD system; Shimadzu Corporation), and ADAM17 cleaved prodrug human NK1 (3 types) obtained in Example 3 was injected. did.
- the ratio of acetonitrile was gradually increased from 100% distilled water containing 0.1% trifluoroacetic acid (0% acetonitrile) to 100%, and a peak was detected at a wavelength of 280 nm.
- the peak at a relative retention time of about 0.65 minutes is defined as the protease-sensitive peptide-added human NK1
- the purity of the prodrug-modified human NK1 and the contamination rate of the protease-sensitive sequence-added human NK1 are determined. It was calculated.
- the purity of human NK1 cleaved by ADAM17 cleaved by chemical modification with PEG having a bifurcated type and a number average molecular weight of 40,000 was 98.9% (contamination ratio of human NK1 with a protease-sensitive peptide added was 1.1%). there were.
- the purity of ADAM17-cleaved prodrug human NK1 obtained by chemical modification with PEG having a linear type and a number average molecular weight of 40,000 was 97.3% (contamination ratio of protease-sensitive peptide-added human NK1 was 2.7%).
- Example 5 Measurement of ADAM17 activity expression level in kidney disease model mouse tissue: The activity expression level of ADAM17 in the kidney disease model mouse tissue was measured using an ADAM17 activity measurement kit (SENSOLYTER520 TACE; ANASPEC). The measurement was performed under two conditions.
- ADAM17 activity measurement kit SENSOLYTER520 TACE; ANASPEC. The measurement was performed under two conditions.
- a unilateral ureteral ligation model mouse (hereinafter referred to as UUO mouse) was prepared as a kidney disease model mouse.
- the ureters of ICR strain male mice (Japan Charles River) were ligated with silk thread.
- the incised site was sutured, and after breeding for 1, 7, 10 and 14 days, the kidney and liver of the mouse were removed.
- As an untreated mouse (hereinafter referred to as a normal mouse), the kidney and liver of the mouse after being raised for 0 and 14 days were extracted.
- the total amount of protein in the centrifugation supernatant was measured using the Protein Assay (Bio-Rad) reagent.
- the ADAM17 activity in the centrifugation supernatant was detected by measuring the fluorescence at 535 nm when excited at 485 nm, and the ADAM17 activity per 1 ⁇ g of protein amount was calculated.
- the results are shown in Figure 1.
- the vertical axis represents ADAM17 activity per 1 ⁇ g of protein amount in each example.
- “Day0”, “Day1”, “Day7”, “Day10”, and “Day14” on the horizontal axis represent the tissues of mice bred for 0, 1, 7, 10, and 14 days, respectively.
- “Normal” indicates a normal mouse
- “UUO” indicates a UUO mouse.
- ADAM17 is useful as a target molecule for controlling the activity of HGF or its active fragment in the form of a prodrug.
- Example 6 Measurement of ADAM17 protein expression level in kidney disease model mouse tissue: The expression level of ADAM17 protein in the kidney disease model mouse tissue was evaluated by Western blotting. The evaluation was performed under two conditions.
- FIG. 2 shows a Western blotting image of each example, and (b) shows an average value calculated from the expression level of ADAM17 protein in the tissue calculated from the band intensity of each example.
- “Day0”, “Day7” and “Day14” in the figure represent mice that were bred for 0, 7 and 14 days, respectively.
- “Normal” indicates a normal mouse, and “UUO” indicates a UUO mouse.
- the vertical axis of (b) shows the expression level of ADAM17 protein in the tissue.
- ADAM17 precursor protein In renal tissue, a decrease in the expression level of ADAM17 precursor protein and an increase in the expression level of ADAM17 mature protein showing ADAM17 activity were observed with time after ureteral ligation.
- ADAM17 mature protein is increased in the renal tissue with advanced renal disease, as compared with the liver tissue and the normal renal tissue.
- ADAM17 is useful as a target molecule for controlling the activity of HGF or its active fragment in the production of a prodrug.
- Example 7 Evaluation of activator release by prodrug-treated human NK1 by protease treatment: The amount of human NK1 (activator) released by treating the prodrug-modified human NK1 with protease was evaluated by SDS electrophoresis.
- the prodrug-human NK1 (ADAM17 cleaved prodrug-human NK1 (3 types) and thrombin cleaved prodrug-human NK1 (1 type)) obtained in Example 3 were added to SENSOLYTE 520 TACE (Anaspec), Component C. was diluted 10 times.
- the following operations were similarly performed on the prodrug-modified human NK1 to which the corresponding protease was not added. After incubating at 37° C. for 1 hour, the reaction solution was subjected to TCA precipitation, subjected to SDS electrophoresis, and the band position obtained by CBB staining was confirmed.
- thrombin cleaved type refers to thrombin cleaved prodrug human NK1
- ADAM17 cleaved type refers to ADAM17 cleaved prodrug human NK1.
- the molecular weight indicates the number average molecular weight.
- Example 8 Evaluation of activity attenuation by chemically modifying NK1 with PEG: The degree of reduction of HGF activity of ADAM17-cleaved prodrug human NK1 was evaluated by the In-Cell ELISA method using the amount of HGF receptor phosphorylation-inducing amount present on the cell surface of human lung epithelial cell line A549 as an index.
- A549 cells were suspended in 10% FCS-containing MEM medium (Nacalai Tesque) and seeded in a 96-well plate for imaging (Becton Dickinson) at a density of 1.5 ⁇ 10 4 /well, and cultured overnight. After the cells were about 70% confluent, the medium was replaced with a serum-free MEM medium (Nacalai Tesque) and cultured for 16 hours or more to bring them into serum starvation. To the cells in the serum-starved state, prodrug human NK1 treated with ADAM17 or prodrug human NK1 not treated with ADAM17 in Example 7 was added and reacted at 37° C. for 10 minutes. In this example, ADAM17-cleaved prodrug NK1 (3 types) obtained by modifying the amino terminal in Example 3 was used as the prodrug human NK1.
- the cells are fixed with PBS(-) containing 4% formalin, and then the cell membrane is permeabilized with PBS(-) containing 0.3% Triton-X and 0.6% hydrogen peroxide, and then blocked with 10% BSA. Processed.
- Anti-pYcMet (CST) as the primary antibody and anti-Rab IgG-HRP (CST) as the secondary antibody are added to the cells after the blocking treatment to react, and then 1 ⁇ QuantaRed Enhanced Chemifluorescent HRP Substrate (thermo-fischer) is applied. Fick) was added. After incubation at room temperature, the fluorescence intensity (RFU) at a wavelength of 590 nm was measured using a plate reader (Envision; Perkin-Elmer) to obtain the amount of HGF receptor phosphorylation induction.
- REU fluorescence intensity
- the EC50 of the concentration-response curve of the sample not treated with ADAM17 was calculated using Prism4 (GraphPad, 4-parameter approximation).
- the degree of HGF activity reduction by PEG modification the EC50 (nM) of the sample not treated with ADAM17 becomes the same signal intensity as the EC50 value of the sample not treated with ADAM17.
- a value (activity fluctuation value (hereinafter, y)) divided by the concentration (nM) was calculated.
- Example 7 the CBB-stained image obtained in Example 7 was analyzed using the ChemiDoc XRS+ system (Bio-Rad), and the cleavage efficiency (hereinafter, w) of the ADAM17-treated prodrug human NK1 was analyzed from the band intensity as follows. It was calculated according to formula (1).
- the protease-sensitive peptide-added human NK1 that is, ADAM17 due to poor purification
- HGF activity (hereinafter referred to as preNK1) due to a precursor contained in a sample not added
- HGF activity due to prodrug human NK1 (hereinafter referred to as Pro)
- HGF activity by human NK1 hereinafter, Pro•cut
- the HGF activity by prodrug-human NK1 not cleaved by ADAM17 that is, uncut
- activity variation value (y) can be described as the expression (6) using the expressions defined by the expressions (1) to (5).
- Activity fluctuation value (y) (preNK1+Pro.cut+Pro.noncut)/(preNK1+Pro) (6)
- the results are shown in Figure 4.
- the vertical axis represents the fluorescence intensity (RFU) representing the amount of HGF receptor phosphorylation induction
- the horizontal axis represents the treatment concentration (nmol/L) of human NK1 prodrug.
- ADAM17- indicates a sample of prodrug-treated human NK1 not treated with ADAM17
- ADAM17+ indicates a sample of prodrug-treated human NK1 treated with ADAM17
- ADAM17-cleavable form refers to ADAM17-cleavable prodrug human NK1.
- the molecular weight indicates the number average molecular weight.
- ADAM17-cleaved prodrug human NK1 chemically modified with any PEG
- the prodrug human NK1 not treated with ADAM17 was compared to the prodrug human NK1 treated with ADAM17 (ADAM17+). It was shown that the HGF activity was attenuated by the chemical modification with PEG.
- ADAM17-cleaved prodrug human NK1 with 2-branched, number-average molecular weight of 40,000 had a HGF activity of 80.1.
- the ADAM17-cleavable prodrug NK1 which was chemically modified using a linear type PEG with a number average molecular weight of 40,000 had a HGF activity attenuated by 70.7%, and a 4-branched PEG with a number average molecular weight of 80,000 was used.
- ADAM17-cleaving prodrug NK1 resulting from the chemical modification used had an HGF activity attenuated by 97.1%.
- the prodrug human NK1 obtained by chemical modification using a PEG having a 4-branched type and a number average molecular weight of 80,000 had the most attenuated HGF activity, and the HGF activity was released by treatment with ADAM17. It was one thirtieth.
- Example 9 Evaluation of release of activator from tissue-selective prodrug human NK1:
- the prodrug-modified human NK1 was exposed to a tissue disruption solution, and the amount of released human NK1 (activator) was evaluated by SDS electrophoresis.
- the 4-terminal branched, amino terminal-modified ADAM17-cleavable prodrug human NK1 obtained by modification with PEG having a number average molecular weight of 80,000 obtained in Example 3 was used. The evaluation was performed under each condition of 2 or 3 cases.
- UUO mice were produced in the same manner as in Example 5 using male mice of C57BL/6J strain (Charles River Japan). After ligating the ureter and breeding for 16 days, the kidneys and livers of UUO mice and normal mice were isolated.
- a buffer solution containing 50 mmol/L Tris-HCl, 10 mmol/L CaCl 2 and 0.05% Brij35 having a pH of 7 was added to the kidney and the liver of the excised mouse, and the tissue disruption solution was prepared in the same manner as in Example 6. Got Qing. The amount of protein in the supernatant of the tissue disruption solution was measured using Protein Assay (Bio-Rad).
- ADAM17 cleaved prodrug human NK1 was added to the supernatant of each tissue disruption solution, and the mixture was incubated at 37° C. for 30 minutes.
- the western blotting image of each example is shown in FIG.
- the band of the active human NK1 was detected in the sample of ADAM17-cleaved prodrug human NK1 mixed with the renal lysate, and the intensity of the band was the human NK1 with the protease-sensitive peptide contained in the prodrug human NK1 ( That is, it was shown to be an active form released from prodrug-human NK1 since it is stronger than the precursor mixed due to poor purification. Further, since the band intensity of human NK1 was higher in the UUO kidney lysate with high ADAM17 activity, it was shown that more human NK1 was released.
- ADAM17-cleaved prodrug human NK1 In contrast, in ADAM17-cleaved prodrug human NK1 mixed with liver lysate, the band of active human NK1 was not detected. Therefore, it was shown that ADAM17-cleaved prodrug human NK1 releases human NK1, which is an active form, selectively in renal tissue.
- ADAM17-cleaved prodrug human NK1 shows reduced HGF activity in liver tissue, and shows higher HGF activity in liver tissue in which ADAM17 is highly expressed than that in liver tissue, and is expected to be effective in kidney tissue. It was shown that side effects on liver tissue can be reduced as well.
- Example 10 In vivo activity measurement of prodrug human NK1: The amount of tissue-selective c-Met phosphorylation-inducing amount of ADAM17-cleaving prodrug-human NK1 in vivo was determined by administration of the ADAM17-cleaving prodrug-human NK1 or the protease (ADAM17)-sensitive peptide-added human NK1 tissue to mice. It was evaluated by the Western blotting method using the disrupted liquid.
- UUO mice were prepared in the same manner as in Example 5, and 14 days after ureteral ligation, protease (ADAM17)-sensitive peptide-added human NK1 (unmodified PEG) or PEG was a bifurcated prodrug having a number average molecular weight of 40,000.
- Human NK1 was administered via the tail vein at a dose of 400 ⁇ g/kg.
- the following operations were similarly performed for normal mice and UUO mice to which the solvent of prodrug-modified human NK1 (PBS( ⁇ ) containing 0.3 mol/L NaCl) was administered. The kidney and liver were removed from the mouse 0.18 hours after the administration.
- the results are shown in Figure 6.
- the vertical axis represents the value of the amount of HGF receptor phosphorylation induction.
- the “normal+solvent” on the horizontal axis indicates the solvent administration group for normal mice
- the “UUO+solvent” indicates the solvent administration group for UUO mice
- the “UUO+protease sensitive peptide-added human NK1” indicates the protease sensitivity for UUO mice.
- the peptide-added human NK1 administration group is shown
- "UUO+prodrug human NK1" shows the prodrug human NK1 administration group for UUO mice.
- the amount of HGF receptor phosphorylation induced by the protease-sensitive peptide-added human NK1 administration group and the prodrug-modified human NK1 administration group is equal, whereas in the liver tissue, by the prodrug-modified human NK1.
- the amount of HGF receptor phosphorylation induction was reduced by 69% as compared with the protease-sensitive peptide-added human NK1. Therefore, the prodrug human NK1 exerts physiological activity selectively in the target disease tissue (that is, the kidney that is a high ADAM17-expressing tissue) in vivo, and the liver tropism originally possessed by the protease-sensitive peptide-added human NK1 is reduced. I showed that.
- Example 11 Comparison of activity control of prodrug human NK1 by different PEG modification sites: The effect on the HGF activity control due to the difference in the position for PEG modification of the protease-sensitive peptide-added human NK1 having the ADAM17-sensitive peptide added to the amino terminus, which was obtained in Example 2, was examined for the effect on the cell surface of the human lung epithelial cell line A549. Was evaluated by the In-Cell ELISA method using the phosphorylation-inducing amount of the HGF receptor present in the above as an index.
- the amino terminal of human NK1 obtained in Example 3 was chemically modified with an ADAM17-sensitive peptide (SEQ ID NO: 9) to form a 2-branched ADAM17-cleavable prodrug, which was chemically modified with PEG having a number average molecular weight of 40,000.
- Human NK1 hereinafter referred to as amino-terminal-modified prodrug-modified human NK1
- ADAM17-cleavable prodrug human NK1 chemically modified by hereinafter, carboxyl terminal modified prodrug human NK1 was used.
- A549 cells were suspended in 10% FCS-containing MEM medium (Nacalai Tesque) and seeded in a 96-well plate for imaging (Becton Dickinson) at a density of 1.5 ⁇ 10 4 /well, and cultured overnight. After the cells were about 70% confluent, the medium was replaced with a serum-free MEM medium (Nacalai Tesque) and cultured for 16 hours or more to bring them into serum starvation. Prodrug human NK1 or protease-sensitive peptide-added human NK1 was added to serum-starved cells and reacted at 37° C. for 10 minutes.
- the cells are fixed with PBS(-) containing 4% formalin, and then the cell membrane is permeabilized with PBS(-) containing 0.3% Triton-X and 0.6% hydrogen peroxide, and then blocked with 10% BSA. Processed.
- Anti-pYcMet (CST) as the primary antibody and anti-Rab IgG-HRP (CST) as the secondary antibody are added to the cells after the blocking treatment to react, and then 1 ⁇ QuantaRed Enhanced Chemifluorescent HRP Substrate (thermo-fischer) is applied. Fick) was added. After incubation at room temperature, the fluorescence intensity (RFU) at a wavelength of 590 nm was measured using a plate reader (Envision; Perkin-Elmer) to obtain the amount of HGF receptor phosphorylation induction.
- REU fluorescence intensity
- a protease-sensitive peptide-added human NK1 that is not PEG-modified in each of prodrug human NK1 in which a protease-sensitive peptide and PEG are added to the amino terminus or carboxyl terminus of human NK1 The relative value when the value of 100 was calculated.
- the results are shown in Fig. 7.
- the vertical axis represents the value of the amount of HGF receptor phosphorylation induction, which is a relative value when the value at the time of treatment with the protease-sensitive peptide-added human NK1 is 100.
- Amino-terminal modification in the legend indicates a sample in which a protease-sensitive peptide and PEG are added to the amino-terminus of human NK1, and "carboxyl-terminal modification” indicates a protease-sensitive peptide and PEG are added to the carboxyl-terminus of human NK1. Showing a sample.
- the HGF receptor phosphorylation-inducing amount (relative value) of prodrug-modified human NK1 was 41 for amino-terminal-modified prodrug-human NK1, while it was 58 for carboxyl-terminal-modified prodrug-human NK1 and was amino-terminal.
- the modified prodrug-modified human NK1 had a further decreased activity due to the chemical modification with PEG, as compared to the carboxyl-terminal modified prodrug-modified human NK1. Therefore, it was shown that the PEG-modified form of HGF or its active fragment of the present invention can further attenuate its activity by modifying the amino terminus of HGF or its active fragment.
- the polyethylene glycol modified form of the hepatocyte growth factor or the active fragment thereof of the present invention can release the hepatocyte growth factor or the active fragment thereof selectively in the target disease tissue, thus showing high activity in the target disease tissue, It can be used as a drug with reduced side effects in liver tissue derived from hepatocyte growth factor or its active fragment.
- SEQ ID NO: 1 Amino acid sequence of human HGF without secretory signal sequence
- SEQ ID NO: 2 Amino acid sequence of human NK1 without secretory signal sequence
- SEQ ID NO: 3 Secretory signal sequence derived from human HGF
- SEQ ID NO: 4 Amino terminus of human NK1 Amino acid sequence of cysteine residue and 6 ⁇ His tag added to SEQ ID NO:5: amino acid sequence of 6 ⁇ His tag and cysteine residue added to the carboxyl terminus of human NK1
- SEQ ID NO:6 base sequence of human HGF gene
- SEQ ID NO:7 Amino acid sequence of human HGF
- SEQ ID NOs: 8-16 Amino acid sequences of ADAM17 sensitive peptides
- SEQ ID NOs: 17-20 Amino acid sequences of thrombin sensitive peptides
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Abstract
Description
(1) 肝細胞増殖因子又はその活性断片の末端に、プロテアーゼ感受性ペプチドを介してポリエチレングリコールが結合している、肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体。
(2) 上記プロテアーゼ感受性ペプチドは、ADAM17感受性ペプチド又はトロンビン感受性ペプチドである、(1)記載のポリエチレングリコール修飾体。
(3) 上記プロテアーゼ感受性ペプチドは、配列表の配列番号8~20のいずれか一つで表されるアミノ酸配列である、(1)記載のポリエチレングリコール修飾体。
(4) 上記ポリエチレングリコールの数平均分子量は、20000~100000である、(1)~(3)のいずれかに記載のポリエチレングリコール修飾体。
(5) 前記肝細胞増殖因子の活性断片は、NK1である、(1)~(4)のいずれかに記載のポリエチレングリコール修飾体。
(6) 前記肝細胞増殖因子の活性断片は、配列表の配列番号2で表されるアミノ酸配列である、(1)~(5)のいずれかに記載のポリエチレングリコール修飾体。
(7) (1)~(6)のいずれかに記載のポリエチレングリコール修飾体を有効成分として含有する、医薬。
本発明に係る肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体(以下、HGF又はその活性断片のPEG修飾体とも称する。)は、1分子の肝細胞増殖因子(HEPATOCYTE GROWTH FACTOR、以下、HGFとも称する。)又はその活性断片の末端(アミノ末端、カルボキシル末端)に、プロテアーゼ感受性ペプチドを介してポリエチレングリコール(以下、PEGとも称する。)が共有結合している。
HGFは、アミノ末端側からNドメイン、クリングル1、クリングル2、クリングル3、クリングル4及びSPHドメインからなり、Nドメイン、クリングル1、クリングル2、クリングル3及びクリングル4がα鎖を構成し、SPHドメインがβ鎖を構成している。HGFは、発現時には一本鎖のpro-HGFとして生合成されるが、分泌される際に分泌シグナル配列が除去された後、細胞外において開始メチオニンから第494番目のアルギニン残基と第495番目のバリン残基の間でプロテアーゼによるプロセッシングを受けて、α鎖とβ鎖とがジスルフィド結合によって結合したヘテロ二量鎖を形成し、活性型となる(Miyazawa K.ら、The Journal of Biological Chemistry、1996年、第271巻、第7号、p.3615-3618)。本明細書においてHGFとは、生理活性を有する活性型のHGFを意味する。
本発明に使用されるプロテアーゼ感受性ペプチドは、肝臓組織以外の標的疾患組織で発現が認められるとともに、肝臓組織での発現が相対的に低いプロテアーゼにより、切断されるペプチドを意味する。
PEGは、水溶性ポリ(エチレンオキシド)を含む、生体適合性の高いポリマー性高分子であり、タンパク質をPEGで化学修飾することにより、該タンパク質に対して物理的安定性、熱安定性、タンパク質分解酵素に対する抵抗性、溶解性の向上、生体内での分布容積の低下、血中滞留性の向上等の臨床的な有用性が付加されることが知られている(Inadaら、Journal of Bioact and Compatible Polymers、第5巻、1990年、p.343; Delgadoら、Critical Reviews in Therapeutic Drug Carrier Systems、第9巻、1992年、p.249; Katre、Advanced Drug Delivery Systems、第10巻、1993年、p.91)。
本発明に係るHGF又はその活性断片のPEG修飾体は、前述の通り、HGF又はその活性断片の末端(アミノ末端、カルボキシル末端)に、プロテアーゼ感受性ペプチドを介してPEGが共有結合している。その製法としては、例えば、プロテアーゼ感受性ペプチドを付加したHGF又はその活性断片とPEGとを共有結合させる方法が挙げられる。
本発明に係るHGF又はその活性断片のPEG修飾体は、PEG修飾による生体内半減期の延長効果が期待できるのみならず、さらに特定のプロテアーゼを発現する標的疾患組織において上記PEG修飾体に含まれるプロテアーゼ感受性ペプチドが切断されることで、HGF又はその活性断片が本来備えている生理活性を発現することができるため、肝臓に対する副作用が低減された医薬(例えば、腎線維症等の臓器線維症の治療薬又は予防薬。)の有効成分として用いることができる。
分泌シグナル配列を除去したヒトNK1のアミノ末端に、プロテアーゼ感受性ペプチドをそのカルボキシル末端から付加し(ADAM17感受性ペプチドとして配列番号9、トロンビン感受性ペプチドとして配列番号17)、プロテアーゼ感受性ペプチドのアミノ末端に6×Hisタグ及びシステイン残基を順に付加(すなわち、プロテアーゼ感受性ペプチドに加えて、CHHHHHH(配列番号4)を付加)したヒトNK1をコードするDNAを人工合成により作製し(ファスマック社)、発現ベクターであるCold-shock promoter/pColdIV(タカラバイオ)に挿入した。作製した発現用プラスミドを、宿主である大腸菌SHuffle T7 Express(New England Biolabs)に遺伝子導入した。
実施例1で得た大腸菌沈査から、プロテアーゼ感受性ペプチド付加ヒトNK1を次の方法により精製した。
1分子のプロテアーゼ感受性ペプチド付加ヒトNK1のアミノ末端のシステイン残基又はカルボキシル末端のシステイン残基に、プロテアーゼ感受性ペプチドを介して1分子のPEGが共有結合したヒトNK1(以下、プロドラッグ化ヒトNK1とも称する。)を、次の方法により合成した。
プロドラッグ化ヒトNK1の純度及びPEGで化学修飾されていない前駆体プロテアーゼ感受性ペプチド付加ヒトNK1の混入率は、高速液体クロマトグラフィーを用いた逆相クロマトグラフィーにて測定した。
腎臓病モデルマウス組織におけるADAM17の活性発現量を、ADAM17活性測定キット(SENSOLYTER520 TACE;ANASPEC)を用いて測定した。測定は、各条件2例で行った。
腎臓病モデルマウス組織におけるADAM17タンパク質の発現量をウエスタンブロッティング法により評価した。評価は、各条件2例で行った。
プロドラッグ化ヒトNK1をプロテアーゼ処理することにより放出されたヒトNK1(活性体)量をSDS電気泳動により評価した。
ADAM17切断型プロドラッグ化ヒトNK1のHGF活性の減弱の程度を、ヒト肺上皮細胞株A549の細胞表面に存在するHGF受容体のリン酸化誘導量を指標として、In-Cell ELISA法により評価した。
プロドラッグ化ヒトNK1の切断効率(%、w)=100-(ADAM17を添加したサンプルのプロドラッグ化ヒトNK1のバンド強度/ADAM17を添加していないサンプルのプロドラッグ化ヒトNK1のバンド強度)×100 ・・・式(1)
ADAM17を添加していないサンプルに含まれるプロテアーゼ感受性ペプチド付加ヒトNK1による活性(preNK1)=(100-v)/100×1 ・・・式(2)
ADAM17を添加していないサンプルに含まれるプロドラッグ化ヒトNK1による活性(Pro)=(v/100)×(x/100) ・・・式(3)
ADAM17を添加したサンプルに含まれる切断されたプロドラッグ化ヒトNK1による活性(Pro・cut)=(v/100)×(w/100)×1 ・・・式(4)
ADAM17を添加したサンプルに含まれる切断されなかったプロドラッグ化ヒトNK1による活性(Pro・noncut)=(v/100)×(100-w)/100×(x/100) ・・・式(5)
活性変動値(y)=(preNK1+Pro・cut+Pro・noncut)/(preNK1+Pro) ・・・式(6)
x={104×(100-v)+102×v×w-104×y×(100-v)}/{v×(102×y)-v×(100-w)} ・・・式(7)
プロドラッグ化ヒトNK1を組織破砕液に暴露させ、放出されたヒトNK1(活性体)量をSDS電気泳動により評価した。本実施例では、実施例3にて取得した4分岐型、数平均分子量80000のPEGを用いた修飾によるアミノ末端修飾ADAM17切断型プロドラッグ化ヒトNK1を使用した。評価は、各条件2例又は3例で行った。
in vivoにおけるADAM17切断型プロドラッグ化ヒトNK1の組織選択的なc-Metのリン酸化誘導量を、ADAM17切断型プロドラッグ化ヒトNK1又はプロテアーゼ(ADAM17)感受性ペプチド付加ヒトNK1を投与したマウスの組織破砕液を用いたウエスタンブロッティング法にて評価した。本実施例では、実施例3にて取得した2分岐型、数平均分子量40000のPEGを用いた化学修飾によるアミノ末端修飾ADAM17切断型プロドラッグ化ヒトNK1、及び実施例2にて取得したプロテアーゼ(ADAM17)感受性ペプチド付加ヒトNK1を使用した。
実施例2にて取得した、アミノ末端にADAM17感受性ペプチドを付加したプロテアーゼ感受性ペプチド付加ヒトNK1に対してPEG修飾する位置の違いによるHGF活性制御への影響を、ヒト肺上皮細胞株A549の細胞表面に存在するHGF受容体のリン酸化誘導量を指標として、In-Cell ELISA法により評価した。本実施例では、実施例3にて取得した、ヒトNK1のアミノ末端をADAM17感受性ペプチド(配列番号9)を介して2分岐型、数平均分子量40000のPEGにより化学修飾したADAM17切断型プロドラッグ化ヒトNK1(以下、アミノ末端修飾プロドラッグ化ヒトNK1)及び実施例3にて取得した、ヒトNK1のカルボキシル末端をADAM17感受性ペプチド(配列番号9)を介して2分岐型、数平均分子量40000のPEGにより化学修飾したADAM17切断型プロドラッグ化ヒトNK1(以下、カルボキシル末端修飾プロドラッグ化ヒトNK1)を使用した。
配列番号2:分泌シグナル配列を含まないヒトNK1のアミノ酸配列
配列番号3:ヒトHGF由来の分泌シグナル配列
配列番号4:ヒトNK1のアミノ末端に付加したシステイン残基及び6×Hisタグのアミノ酸配列
配列番号5:ヒトNK1のカルボキシル末端に付加した6×Hisタグ及びシステイン残基のアミノ酸配列
配列番号6:ヒトHGF遺伝子の塩基配列
配列番号7:ヒトHGFのアミノ酸配列
配列番号8~16:ADAM17感受性ペプチドのアミノ酸配列
配列番号17~20:トロンビン感受性ペプチドのアミノ酸配列
Claims (7)
- 肝細胞増殖因子又はその活性断片の末端に、プロテアーゼ感受性ペプチドを介してポリエチレングリコールが結合している、肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体。
- 前記プロテアーゼ感受性ペプチドは、ADAM17感受性ペプチド又はトロンビン感受性ペプチドである、請求項1記載のポリエチレングリコール修飾体。
- 前記プロテアーゼ感受性ペプチドは、配列表の配列番号8~20のいずれか一つで表されるアミノ酸配列である、請求項1記載のポリエチレングリコール修飾体。
- 前記ポリエチレングリコールの数平均分子量は、20000~100000である、請求項1~3のいずれか一項記載のポリエチレングリコール修飾体。
- 前記肝細胞増殖因子の活性断片は、NK1である、請求項1~4のいずれか一項記載のポリエチレングリコール修飾体。
- 前記肝細胞増殖因子の活性断片は、配列表の配列番号2で表されるアミノ酸配列である、請求項1~5のいずれか一項記載のポリエチレングリコール修飾体。
- 請求項1~6のいずれか一項記載のポリエチレングリコール修飾体を有効成分として含有する、医薬。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3124682A CA3124682A1 (en) | 2019-01-28 | 2020-01-28 | Polyethylene glycol-modified form of hepatocyte growth factor or active fragment thereof |
EP20748429.6A EP3919128A4 (en) | 2019-01-28 | 2020-01-28 | POLYETHYLENE GLYCOL MODIFIED BODY FOR HEPATORYTE GROWTH FACTOR OR ACTIVE FRAGMENT THEREOF |
CN202080009047.8A CN113272019A (zh) | 2019-01-28 | 2020-01-28 | 肝细胞生长因子或其活性片段的聚乙二醇修饰体 |
BR112021012472A BR112021012472A2 (pt) | 2019-01-28 | 2020-01-28 | Forma modificada por polietileno glicol de um fator de crescimento de hepatócito ou um fragmento ativo do mesmo, e, medicamento |
US17/421,417 US20220220176A1 (en) | 2019-01-28 | 2020-01-28 | Polyethylene glycol-modified form of hepatocyte growth factor or active fragment thereof |
JP2020508628A JPWO2020158691A1 (ja) | 2019-01-28 | 2020-01-28 | 肝細胞増殖因子又はその活性断片のポリエチレングリコール修飾体 |
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US (1) | US20220220176A1 (ja) |
EP (1) | EP3919128A4 (ja) |
JP (1) | JPWO2020158691A1 (ja) |
CN (1) | CN113272019A (ja) |
BR (1) | BR112021012472A2 (ja) |
CA (1) | CA3124682A1 (ja) |
WO (1) | WO2020158691A1 (ja) |
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WO1996028475A1 (fr) | 1995-03-10 | 1996-09-19 | Nakamura, Toshikazu | Facteur de croissance des hepatocytes modifie a l'aide de polyethylene glycol |
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WO2006014928A1 (en) * | 2004-07-26 | 2006-02-09 | Genentech, Inc. | Methods and compositions for modulating hepatocyte growth factor activation |
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BRPI0720647A2 (pt) * | 2006-12-29 | 2014-01-14 | Osprey Pharmaceuticals Usa Inc | Processos de seleção e produção de toxinas modificadas, conjugados contendo toxinas modificadas e usos dos mesmos |
CN104109235B (zh) * | 2014-05-30 | 2017-07-18 | 厦门赛诺邦格生物科技股份有限公司 | 一种具有氮原子支化中心的单一官能化聚乙二醇、制备方法及其生物相关物质 |
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2020
- 2020-01-28 BR BR112021012472A patent/BR112021012472A2/pt not_active Application Discontinuation
- 2020-01-28 JP JP2020508628A patent/JPWO2020158691A1/ja active Pending
- 2020-01-28 CA CA3124682A patent/CA3124682A1/en active Pending
- 2020-01-28 US US17/421,417 patent/US20220220176A1/en not_active Abandoned
- 2020-01-28 CN CN202080009047.8A patent/CN113272019A/zh active Pending
- 2020-01-28 WO PCT/JP2020/002864 patent/WO2020158691A1/ja unknown
- 2020-01-28 EP EP20748429.6A patent/EP3919128A4/en not_active Withdrawn
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BR112021012472A2 (pt) | 2021-11-30 |
EP3919128A4 (en) | 2023-01-11 |
CN113272019A (zh) | 2021-08-17 |
US20220220176A1 (en) | 2022-07-14 |
EP3919128A1 (en) | 2021-12-08 |
JPWO2020158691A1 (ja) | 2021-12-02 |
CA3124682A1 (en) | 2020-08-06 |
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