WO2023219065A1 - シアル酸含有糖鎖の製造方法 - Google Patents
シアル酸含有糖鎖の製造方法 Download PDFInfo
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- WO2023219065A1 WO2023219065A1 PCT/JP2023/017322 JP2023017322W WO2023219065A1 WO 2023219065 A1 WO2023219065 A1 WO 2023219065A1 JP 2023017322 W JP2023017322 W JP 2023017322W WO 2023219065 A1 WO2023219065 A1 WO 2023219065A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0003—General processes for their isolation or fractionation, e.g. purification or extraction from biomass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0063—Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/26—Preparation of nitrogen-containing carbohydrates
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P21/00—Preparation of peptides or proteins
- C12P21/005—Glycopeptides, glycoproteins
Definitions
- the present disclosure provides a method for producing a sialic acid-containing sugar chain, and more specifically, a method for producing a highly purified composition containing a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends from chicken eggs. Regarding the method.
- the present disclosure also relates to a composition containing highly purified sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends.
- sugar chains play a variety of roles in living organisms, and are used in the modification of active pharmaceutical ingredients, the manufacture of pharmaceuticals, and assays. Sugar chains used in such applications are required to have high uniformity from the viewpoint of quality and precision.
- Non-Patent Document 1 Patent Documents 1 and 2.
- An object of the present disclosure is to provide a method for producing a sugar chain-containing composition with higher purity (uniformity) from chicken eggs.
- sugar chains produced from chicken eggs have been thought to have all sialic acids at their non-reducing ends of the ⁇ 2,6-linked type.
- the inventors of the present application found that some non-reducing terminals were detected as trace impurities in a sugar chain mixture extracted from chicken eggs. It was also discovered that all of them contain sugar chains having ⁇ 2,3-linked sialic acid, and the present invention was completed.
- the present invention includes the following features:
- a method for producing a composition containing highly purified sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends from a sugar chain extract derived from chicken eggs comprising: The sugar chain extract derived from chicken eggs is subjected to a treatment to enrich sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends. Production method.
- the sugar chain is a disialo sugar chain, Production method.
- the manufacturing method according to (1) The sugar chain is the following compound: is in the form of Production method.
- the enrichment treatment involves separating sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends from sugar chains having ⁇ 2,3-linked sialic acid at any non-reducing end. including, Production method.
- the manufacturing method according to (1) includes enzymatic treatment or acid hydrolysis treatment of sugar chains having ⁇ 2,3-linked sialic acid at any non-reducing end. Production method.
- the manufacturing method according to (6), The enzyme treatment includes treatment with ⁇ 2,3 sialidase, Production method.
- the manufacturing method according to (1) includes derivatization of a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends or a sugar chain having ⁇ 2,3-linked sialic acid at any non-reducing end. , Production method.
- the manufacturing method according to (9), The method for introducing the fat-soluble substituent is esterification, thioesterification, amidation, or hydrazidation of the sialic acid carboxy group. Production method.
- the fat-soluble substituent is a benzyl group introduced into the carboxylic acid of sialic acid, Production method.
- composition consisting essentially of sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends.
- composition according to (13), The sugar chain is a disialo sugar chain, Production method.
- the manufacturing method according to (13), The sugar chain is the following compound: is in the form of Composition.
- composition according to (13) At least 97% of all sugar chains are sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends. Composition.
- composition according to (13) At least 98% of all sugar chains are sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends. Composition.
- composition according to (13) At least 99% of all sugar chains are sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends. Composition.
- composition according to (13) At least 95% of all sugar chains are sugar chains that have ⁇ 2,6-linked sialic acids at all non-reducing ends, and have ⁇ 2,3-linked sialic acids at any non-reducing end. Contains less than 2% of the total sugar chains, Composition.
- a method for producing a composition containing a highly purified sugar chain having ⁇ 2,6-linked sialic acid at the non-reducing end of The sugar chain mixture is as follows: (a) Subjecting to liquid chromatography using a HILIC column (b) Subjecting to liquid chromatography after decomposing or denaturing a sugar chain having ⁇ 2,3-linked sialic acid at either non-reducing end or (c) derivatizing the sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends, and then purifying the sugar chain by subjecting it to liquid chromatography. Method.
- the manufacturing method according to (20), The sugar chain is a disialo sugar chain, Production method.
- the manufacturing method according to (20), The decomposition includes treating a sugar chain having an ⁇ 2,3-linked sialic acid at any non-reducing end by enzymatic treatment or acid hydrolysis. Production method.
- the manufacturing method according to (23), The enzyme treatment includes treatment with ⁇ 2,3 sialidase, Production method.
- a method for producing a sugar chain-containing composition with higher purity (uniformity) from chicken eggs is provided.
- FIG. 1 shows the analysis results of a mixture of disialoglycosylated asparagine chains.
- the above figure shows the results of HPLC analysis in HILIC mode of the disialoglycosylated asparagine-Fmoc mixture obtained and prepared from chicken eggs according to Reference Example 2.
- the figure below shows the mass spectrometry results (ESI-MS) of a minor peak (3.7%) revealed by HPLC in HILIC mode.
- FIG. 2 shows the HPLC analysis results of the minor peaks revealed in FIG.
- Figure 3 shows the HPLC results in HILIC mode (left figure) of the disialoglycosylated asparagine-Fmoc mixture obtained in Reference Example 2 and the impurities obtained in Example 2, and the ODS of the impurities revealed by the HPLC.
- FIG. 4 shows the HPLC analysis results of impurities obtained in Example 2.
- the vertical axis shows absorbance (mAU) and the horizontal axis shows time (minutes).
- FIG. 5 shows the results of HPLC analysis of the reaction product of the enzyme treatment ( ⁇ 2,3-sialidase or ⁇ 2,3-2,6-2,8-sialidase) of impurities obtained in Example 2.
- FIG. 6 shows the results of HPLC analysis of the enzyme treatment ( ⁇ 2,3-sialidase or ⁇ 2,3-2,6-2,8-sialidase) reaction product of GT-25001.
- FIG. 7 shows the results of HPLC analysis of the enzyme treatment ( ⁇ 2,3-sialidase or ⁇ 2,3-2,6-2,8-sialidase) reaction product of GT-25025.
- FIG. 8 shows a comparison of the amount of impurities between lots of the disialoglycosylated asparagine-Fmoc mixture prepared from defatted egg yolk.
- FIG. 9 shows the HPLC results of the enzyme-treated ( ⁇ 2,3-sialidase) reaction product of the disialoglycosylated asparagine-Fmoc mixture obtained and prepared from chicken eggs according to Reference Example 2.
- FIG. 10 shows the enzyme-treated ( ⁇ 2,3-sialidase) reaction product of the disialoglycosylated asparagine-Fmoc mixture obtained and prepared from chicken eggs according to Reference Example 2, and the HPLC results after its purification.
- FIG. 11 shows HPLC results after a condensation reaction of a disialo-sugar chain asparagine-Fmoc mixture obtained and prepared from chicken eggs according to Reference Example 2.
- FIG. 12 shows the HPLC results of the reaction product obtained by Bn conversion treatment of the disialoglycosylated asparagine-Fmoc mixture obtained and prepared from chicken eggs according to Reference Example 2, deprotecting the Bn group and Fmoc group, and performing Fmoc conversion again. show.
- FIG. 13 shows HPLC results of a reaction product obtained by enzymatically treating commercially available SGP ( ⁇ 2,3-sialidase), cutting off sugar chains, and labeling.
- the present disclosure provides a method for producing a composition containing highly purified sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends from a sugar chain extract derived from chicken eggs (hereinafter referred to as (also referred to as "manufacturing method (1) of the present disclosure”).
- the present disclosure includes a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends and a sugar chain having ⁇ 2,3-linked sialic acid at any non-reducing end.
- a method for producing a composition containing highly purified sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends from a sugar chain mixture (hereinafter also referred to as "production method (2) of the present disclosure") Regarding.
- the present disclosure relates to a composition produced by the method described in production method (1) or (2) of the present invention.
- the present disclosure relates to a composition consisting essentially of sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends.
- the "sugar chain extract derived from chicken eggs” is a fraction consisting of specific sialyl sugar chains extracted and separated from chicken eggs, preferably the egg yolks thereof.
- the “sugar chain extract derived from chicken eggs” is typically a fraction consisting of disialo-sugar chains.
- sugar chains contained in the "sugar chain extract derived from chicken eggs” can be extracted in any form such as free sugar chains, sugar amino acids, and glycopeptides, and those skilled in the art can appropriately select the desired form. Can be done.
- the "sugar chain extract derived from chicken eggs” is obtained mainly in the form of sialyl glycopeptide (SGP).
- SGP sialyl glycopeptide
- the "sugar chain extract derived from chicken eggs” is obtained mainly in the form of asparagine sugar chains.
- treatment with peptidase is performed in the sugar chain extraction process from chicken eggs.
- sugar chain extract derived from chicken eggs refers to a sugar chain-containing composition obtained by any method that can be used to obtain sugar chain compounds from chicken eggs (preferably egg yolks). Methods that can be used to obtain sugar chain compounds from chicken eggs (preferably egg yolks) include, but are not limited to, the above-mentioned Patent Documents 1 and 2 and Non-Patent Document 1, which are incorporated herein by reference. Examples include methods described in .
- the "sugar chain extract derived from chicken eggs” can be obtained, for example, by phenol extraction of raw egg yolk, followed by a purification process using six size exclusion and ion exchange columns (A. Seko et al. , Biochim. Biophys. Acta-Gen. Subj. 1335 (1997) 23.).
- porous graphite carbon column (PGC) column chromatography can be used instead of size exclusion chromatography (Y. Zou et al., J. Carbohydr. Chem. 31 (2012) 436.).
- PPC porous graphite carbon column
- the above process can also be optimized by removal of lipids via diethyl ether extraction (B. Sun et al., Carbohydr. Res. 396 (2014) 62).
- washing of egg yolk powder with diethyl ether, extraction with an aqueous ethanol solution, and subsequent purification using an activated carbon column can also be used (L. Liu et al., Carbohydrate.Res. .452 (2017) 122).
- the production method (1) of the present disclosure is characterized in that the sugar chain extract derived from chicken eggs is subjected to a treatment to enrich sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends. .
- the sugar chain enriched by the production method (1) of the present disclosure has the following form.
- enrichment of sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends is performed by separation from sugar chains other than the sugar chains.
- the separation is not particularly limited as long as it can separate substances based on molecular weight, charge, and other chemical properties, but liquid column chromatography is preferably used.
- the enrichment of sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends includes the enrichment of sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends. This is carried out by a treatment that includes separation from a sugar chain having an ⁇ 2,3-linked sialic acid at either non-reducing end. A sugar chain that has ⁇ 2,6-linked sialic acid at all non-reducing ends and a sugar chain that has ⁇ 2,3-linked sialic acid at any non-reducing end have a binding mode in the sugar chain at the non-reducing end. The only difference is that the molecular weights are the same.
- the present inventors have recently discovered that a mixture of both sugar chains can be separated by liquid chromatography using a HILIC column. Therefore, in one embodiment, it is possible to separate a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends from a sugar chain having ⁇ 2,3-linked sialic acid at any non-reducing end. Chromatography using a liquid HILIC column is used.
- a sugar chain having an ⁇ 2,3-linked sialic acid at any non-reducing end is decomposed before being subjected to a separation process.
- the decomposition includes, for example, a treatment in which only ⁇ 2,3-linked sialic acid is specifically decomposed using an enzyme, and acid hydrolysis.
- Enzymes that can be used in the enzyme treatment include, but are not limited to, ⁇ 2,3 sialidase, non-specific sialidase, and the use of sialyltransferases having sialidase activity.
- a sugar chain having an ⁇ 2,3-linked sialic acid at any non-reducing end is subjected to a treatment before being subjected to a separation treatment.
- modification include lactonization of ⁇ 2,3-linked sialic acid, as well as introduction of substituents by esterification, thioesterification, amidation, hydrazidation, and the like. Lactonization is known to form a lactone within the molecule when ⁇ 2,3-linked sialic acid activates the carboxylic acid at the 1-position of sialic acid (Glycoconj. J. (2021) 38: 157-166 ), which makes use of its properties.
- a treatment is performed to derivatize sugar chains having ⁇ 2,6-linked sialic acids at all non-reducing ends.
- the derivatization include esterification, thioesterification, amidation, and hydrazidation of sialic acid carboxy groups.
- the derivatized sugar chain may be used as it is, or may include a step of removing substituents.
- the pretreatment before separation as described above has the advantage that it facilitates the separation of ⁇ 2,6-linked sialic acid and allows the use of a conventional column suitable for mass production.
- a sugar chain mixture is prepared as follows: (a) Subjecting to liquid chromatography using a HILIC column; (b) subjecting to liquid chromatography after decomposing or denaturing a sugar chain having an ⁇ 2,3-linked sialic acid at any of its non-reducing ends; or (c) subjecting it to liquid chromatography at any of its non-reducing ends;
- the method is characterized in that after derivatizing a sugar chain having bound sialic acid, the sugar chain is purified by subjecting it to liquid chromatography.
- the sugar chain mixture in this embodiment includes a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends and a sugar chain having ⁇ 2,3-linked sialic acid at any non-reducing end.
- a sugar chain having ⁇ 2,6-linked sialic acid at all non-reducing ends includes any sugar chain extract extracted from chicken eggs or egg yolks, mixtures of sugar chains produced by chemical synthesis, and sugar chains cultured by genetic recombination technology. Also includes mixtures.
- the sugar chain purified by the production method (2) of the present disclosure has the following form.
- the decomposition includes, for example, a process of specifically preferentially decomposing ⁇ 2,3-linked sialic acid using an enzyme.
- Enzymes that can be used in the enzyme treatment include, but are not limited to, ⁇ 2,3 sialidase, non-selective sialidase, and the use of sialyltransferases having sialidase activity.
- a sugar chain having an ⁇ 2,3-linked sialic acid at any non-reducing end is subjected to a treatment before being subjected to a separation treatment.
- modification include lactonization, esterification, thioesterification, amidation, and hydrazidation of ⁇ 2,3-linked sialic acid.
- a sugar chain having an ⁇ 2,6-linked sialic acid at the non-reducing end is derivatized before being subjected to the separation process.
- the derivatization include esterification, thioesterification, amidation, and hydrazidation of sialic acid carboxy groups.
- the derivatized sugar chain may be used as it is, or may include a step of removing substituents.
- the production method (1) or (2) of the present disclosure further includes introducing a fat-soluble substituent into the enriched or purified sugar chain.
- the substituent is typically introduced into the carboxylic acid group of the sialic acid. This allows the sugar chain to be stabilized. Introduction of said substituents to the carboxylic acid group of sialic acid is within the skill of those skilled in the art.
- methods for introducing a fat-soluble substituent that can be used in the present disclosure include esterification, thioesterification, amidation, hydrazidation, and the like of a sialic acid carboxy group.
- fat-soluble substituents that can be used in the present disclosure include, but are not limited to, benzyl groups and phenacyl groups.
- composition produced by the above production method consists essentially of sugar chains having ⁇ 2,6-linked sialic acid at all non-reducing ends.
- substantially comprises at least 97%, at least 98%, at least 99%, at least 99.1%, at least 99.2% of all sugar chains contained in the composition. , at least 99.3%, at least 99.4%, at least 99.5%, at least 99.6%, at least 99.7%, at least 99.8%, or at least 99.9% of all non-reducing ends It can mean that it is a sugar chain having ⁇ 2,6-linked sialic acid.
- substantially consists of refers to at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, at least 99% of all sugar chains contained in the composition. .1%, at least 99.2%, at least 99.3%, at least 99.4%, at least 99.5%, at least 99.6%, at least 99.7%, at least 99.8%, or at least 99. 9% of all sugar chains have ⁇ 2,6-linked sialic acids at all non-reducing ends, and 9% of all sugar chains have ⁇ 2,3-linked sialic acids at any non-reducing end.
- first, second, etc. may be used to describe various elements, it is understood that these elements should not be limited by these terms. These terms are only used to distinguish one element from another; for example, a first element may be referred to as a second element; similarly, a first element may be referred to as a second element; It is possible to write this without departing from the scope of the present invention.
- sodium azide 21 mg
- actinase E 43 mg
- the mixture was allowed to stand for 24 hours while checking that the pH was 7.5 every 12 hours. If a change in pH was confirmed, the pH was adjusted to 7.5 with an aqueous trishydroxymethylaminomethane solution or an aqueous hydrochloric acid solution. After standing for 24 hours, actinase E (21.5 mg) was added to the reaction solution again, and the reaction was allowed to proceed for about 48 hours while checking that the pH was 7.5.
- the pH was adjusted to 7.5 with an aqueous trishydroxymethylaminomethane solution or an aqueous hydrochloric acid solution. After confirming the completion of the reaction by TLC, the mixture was filtered through Celite. After concentrating the filtrate, it was purified by gel filtration column chromatography (Sephadex G-25, 2.5 x 100 cm, water). Fractions containing the desired disialo-sugar chain compound were collected and concentrated, and then freeze-dried to obtain a mixture of disialo-sugar chain asparagine.
- the main peak that appeared after about 15 minutes was collected and concentrated.
- desalting treatment was performed using an ODS column.
- 13.3 mg of the desired disialo-sugar chain asparagine-Fmoc which is a sugar chain asparagine compound in which the amino group nitrogen of asparagine is protected with an Fmoc group, was obtained.
- GT-25002 50 mg, MW: 2267.8, 22 ⁇ mol, GlyTech, Inc.
- protease inhibitor 0.5 mL, cOmplete, Roche, 11836170001, 1 tablet dissolved in water (0.5 mL)
- 2 mM PMSF/ DMSO 40 ⁇ L
- Bacterial Alkaline Phosphatase 40 ⁇ L, Roche, 03359123001, 14 Units/ ⁇ L
- BSA 50 ⁇ L mg, SIGMA, A3159 -50G
- water (9.4 mL) was added, and 50 ⁇ L was dispensed for HPLC analysis.
- HPLC analysis conditions ODS: (CAPCELL PAK C18 UG120 250 x 4.6 mm, flow rate 0.70 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, gradient A85% ⁇ A75% (20 minutes) ⁇ A5 % (25 minutes) ⁇ A85% (45 minutes))
- HPLC purification conditions (CAPCELL PAK C18 UG120 250 x 20 mm, flow rate 7.0 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, gradient A80% ⁇ A80% (5 minutes) ⁇ A75% (25 minutes) ⁇ A10% (30 minutes) ⁇ A80% (45 minutes))
- GT-25006 50 mg, MW: 2267.8, 22 ⁇ mol, GlyTech, Inc.
- protease inhibitor 0.5 mL, cOmplete, Roche, 11836170001, 1 tablet dissolved in water (0.5 mL)
- 2 mM PMSF/ DMSO 0.4 mL
- Bacterial Alkaline Phosphatase 0.04 mL, Roche, 03359123001, 14 Unit/ ⁇ L
- B SA 50mg, SIGMA, A3159-50G
- water (9.4 mL) were added, and 50 ⁇ L was dispensed for HPLC analysis.
- HPLC analysis conditions ODS: (CAPCELL PAK C18 UG120 250 x 4.6 mm, flow rate 0.70 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, gradient A85% ⁇ A75% (20 minutes) ⁇ A5 % (25 minutes) ⁇ A85% (45 minutes))
- HPLC purification conditions (CAPCELL PAK C18 UG120 250 x 20 mm, flow rate 7.0 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, gradient A80% ⁇ A80% (5 minutes) ⁇ A75% (25 minutes) ⁇ A10% (30 minutes) ⁇ A80% (45 minutes))
- Bacterial Alkaline Phosphatase (0.3 mL, Roche, 03359123001, 14 Unit/ ⁇ L), ⁇ 2,3-sialyltransferase (500 mg), Cytidine 5 were added to the sugar chain aqueous solution (about 50 mL) after dispensing.
- HPLC analysis conditions (CAPCELL PAK C18 UG120 250 x 4.6 mm, flow rate 0.70 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, isocratic (A: 80%, B: 20%)
- HPLC purification conditions (SP-300-5-ODS-BIO 250 x 30 mm, flow rate 25 mL/min, mobile phase A: 25 mM ammonium acetate aqueous solution, B: acetonitrile, gradient A95% ⁇ A95% (10 minutes) ⁇ A85% ( 10.1 minutes) ⁇ A82% (40 minutes)
- Example 1 Analysis of disialo-glycan asparagine-Fmoc
- Disialo-glycan asparagine-Fmoc (5 mg, 2.0 ⁇ mol) obtained in Reference Example 2 was dissolved in water and the volume was adjusted to 10.0 mL. After a fixed volume of the sugar chain aqueous solution, 10 ⁇ L was injected into HPLC and analyzed. As a result, after the disialoglycosylated asparagine-Fmoc peak (94.9%) eluting around 23 minutes, another peak (3.7%) showing the same mass eluting around 24 minutes was confirmed (Figure 1). .
- Example 2 Impurity analysis of disialo-glycan asparagine-Fmoc
- Disialo- glycan asparagine-Fmoc 200 mg obtained in Reference Example 2 was dissolved in water (4 mL), and then diluted with acetonitrile (12 mL). After dilution, the slightly cloudy sugar chain aqueous solution was purified by HPLC and freeze-dried. (HPLC purification conditions) After lyophilization, an impurity purified product (2.4 mg) was obtained by desalting using an ODS carrier (FIG. 3).
- Example 3 Estimation of structure of impurity The impurity prepared in Example 2 was decomposed with a sialic acid hydrolase.
- Example 6 Analysis of lot-to-lot differences in disialo-glycan asparagine mixture obtained from chicken eggs
- disialo-glycan asparagine-Fmoc was prepared from defatted egg yolks of multiple production lots according to Reference Examples 1 and 2.
- the obtained disialo-sugar chain asparagine-Fmoc (5 mg, 2.0 ⁇ mol) was dissolved in water and the volume was adjusted to 10.0 mL. After a fixed volume of the sugar chain aqueous solution, 10 ⁇ L was injected into HPLC and analyzed.
- Example 7 Purification of disialo-glycan asparagine-Fmoc
- Disialo- glycan asparagine-Fmoc 50 mg, 20 ⁇ mol obtained in Reference Example 2 was dissolved in a 75% acetonitrile solution (2.5 mL). The mixture was injected into an HPLC column and purified to avoid contamination with impurities GT-25034 and GT-25035. By desalting the fraction containing GT-25001, GT-25001 (36 mg, 14 ⁇ mol, yield 70%) containing 0.2% of GT-25034 and GT-25035 was obtained.
- HPLC preparative separation conditions (Asahipak NH2P-90 20F 300 x 20 mm, flow rate 8 mL/min, mobile phase A: aqueous solution containing 5% acetic acid/3% triethylamine, B: acetonitrile solution containing 2% acetic acid, gradient A 25% ⁇ A 25% (5 minutes) ⁇ A65% (5.1-65 minutes)
- Example 8 Removal of impurities contained in disialoglycosylated asparagine-Fmoc mixture (1)
- HPLC analysis conditions (Asahipak NH2P-50 4E 5 ⁇ m 250 x 4.6 mm, flow rate 0.70 mL/min, mobile phase A: 5% acetic acid, aqueous solution containing 3% triethylamine, B: acetonitrile containing 2% acetic acid, isocratic ( A: 60%, B: 40%)
- HPLC preparative separation conditions (SP-300-5-ODS-BIO 5 ⁇ m 250 x 30mm, flow rate 25mL/min, mobile phase A: 25mM ammonium acetate aqueous solution, B: acetonitrile, gradient A90% ⁇ A80% (30 minutes)
- ESI-MS Calcd for C 103 H 154 N 8 O 66 [M+H] + 2559.89, [M+2H] +2 1280.45, [M+3H] +3 853.96, found 1280.44, 853.95.
- Example 9 Removal of impurities contained in disialoglycan asparagine-Fmoc (2) (derivatization by lactonization) 500 mM HOBt and 500 mM DIC were added to the disialoglycosylated asparagine-Fmoc (50 mg) obtained in Reference Example 2, and the mixture was reacted at room temperature for 1 hour. After 1 hour, the reaction solution (10 ⁇ L) was diluted with an acetonitrile/water mixture (7:3, 90 ⁇ L), and 5 ⁇ L was injected for HPLC analysis.
- HPLC preparative separation conditions (CAPCELL PAK UG120 C18 5 ⁇ m 250 x 4.6 mm, flow rate 0.7 mL/min, developing solvent A: water/trifluoroacetic acid (1000:1), B: acetonitrile/trifluoroacetic acid (1000:1) Gradient A99% ⁇ A70% (30 minutes)
- HPLC analysis conditions (ACQUITY UPLC Glycan BEH Amide, 1.7 ⁇ m 150 x 2.1 mm, flow rate 0.35 mL/min, mobile phase A: 50 mM ammonium formate (pH 4.4), B: acetonitrile, gradient A 30% ⁇ A30 % (66 minutes)
- Example 10 Removal of impurities contained in disialo sugar chain asparagine-Fmoc (3) (derivatization (esterification) with benzyl group) NMP/DMF/water (84:15:1) (250 ⁇ L) was added to the disialoglycosylated asparagine-Fmoc (25 mg) obtained in Reference Example 2, and the mixture was stirred at 40° C. for 1 hour to dissolve. After 1 hour, benzyl bromide (8.6 ⁇ L, 3.6 eq) was added and stirred at 40°C. After 6 hours, 1M sodium carbonate (50 ⁇ L) was added, and the mixture was stirred at room temperature for 2 hours, and then purified using an ODS column.
- This solution was diluted by adding acetonitrile (358 ⁇ L), and the RFMS-labeled sugar chain was subjected to solid phase extraction using GlycoWorks HILIC ⁇ Elution Plate, and after freeze-drying, it was redissolved in a solvent to prepare a sample solution. As a result of analyzing the sample solution, it was confirmed that impurities derived from ⁇ 2,6/ ⁇ 2,3 and ⁇ 2,3/ ⁇ 2,6 had disappeared (FIG. 13).
- HPLC preparative separation conditions (CAPCELL PAK UG120 C18 5 ⁇ m 250 x 4.6 mm, flow rate 0.7 mL/min, developing solvent A: water/trifluoroacetic acid (1000:1), B: acetonitrile/trifluoroacetic acid (1000:1) ) Gradient A99% ⁇ A70% (30 minutes)
- HPLC analysis conditions (ACQUITY UPLC Glycan BEH Amide, 1.7 ⁇ m 150 x 2.1 mm, flow rate 0.35 mL/min, mobile phase A: 50 mM ammonium formate (pH 4.4), B: acetonitrile, gradient A 25% ⁇ A31 % (66 minutes)
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Abstract
Description
前記鶏卵由来の糖鎖抽出物において、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を富化する処理を行うことを特徴とする、
製造方法。
前記糖鎖は、ジシアロ糖鎖である、
製造方法。
前記糖鎖は、下記の化合物:
製造方法。
前記富化する処理は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖と分離することを含む、
製造方法。
前記分離は、液体クロマトグラフィーによって行う、
製造方法。
前記富化する処理は、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を酵素処理または酸加水分解による処理することを含む、
製造方法。
前記酵素処理は、α2,3シアリダーゼによる処理を含む、
製造方法。
前記富化する処理は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖またはいずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖の誘導体化を含む、
製造方法。
糖鎖に脂溶性の置換基を導入することをさらに含む、
製造方法。
脂溶性の置換基の導入方法は、シアル酸カルボキシ基のエステル化、チオエステル化、アミド化、またはヒドラジド化である、
製造方法。
脂溶性の置換基がシアル酸のカルボン酸に導入されたベンジル基である、
製造方法。
前記糖鎖は、ジシアロ糖鎖である、
製造方法。
前記糖鎖は、下記の化合物:
組成物。
全糖鎖のうちの少なくとも97%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。
全糖鎖のうちの少なくとも98%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。
全糖鎖のうちの少なくとも99%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。
全糖鎖のうちの少なくとも95%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖であり、かつ
いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を全糖鎖の2%未満で含む、
組成物。
前記糖鎖混合物を、以下:
(a)HILICカラムを用いた液体クロマトグラフィーに供すること
(b)非還元末端のいずれかにα2,3結合型のシアル酸を有する糖鎖を分解または変性させた後に、液体クロマトグラフィーに供すること;または
(c)全ての非還元末端のα2,6結合型のシアル酸を有する糖鎖を誘導体化させた後に、液体クロマトグラフィーに供すること
により、前記糖鎖を精製することを特徴とする、
方法。
前記糖鎖は、ジシアロ糖鎖である、
製造方法。
前記糖鎖は、下記の化合物:
製造方法。
前記分解は、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を酵素処理または酸加水分解による処理することを含む、
製造方法。
前記酵素処理は、α2,3シアリダーゼによる処理を含む、
製造方法。
前記変性は、全ての非還元末端のα2,6結合型のシアル酸を有する糖鎖またはいずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖のいずれかまたは両方を誘導体化することを含む、
製造方法。
本開示は、一態様において、鶏卵由来の糖鎖抽出物から、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を高純度で含む組成物を製造する方法(以下、「本開示の製造方法(1)」とも称する)に関する。
本開示の製造方法(1)は、前記鶏卵由来の糖鎖抽出物において、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を富化する処理を行うことを特徴とする。
上記のような分離前の前処理は、α2,6結合型のシアル酸の分離を容易にし、大量生産に適した通常のカラムを使用することができる点で利点を有する。
本開示の製造方法(2)は、糖鎖混合物を、以下:
(a)HILICカラムを用いた液体クロマトグラフィーに供すること;
(b)非還元末端のいずれかにα2,3結合型のシアル酸を有する糖鎖を分解または変性させた後に、液体クロマトグラフィーに供すること;または
(c)全ての非還元末端のα2,6結合型のシアル酸を有する糖鎖を誘導体化させた後に、液体クロマトグラフィーに供すること
により、前記糖鎖を精製することを特徴とする。
上記の製造方法によって製造された組成物は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖から実質的になる組成物である。
エタノール(EtOH、67mL)を撹拌しているところに、卵黄1個を割り入れた。約5時間撹拌した後に濾過を行い、さらにEtOH(30mL)で洗浄を行った。得られた沈殿に、再度EtOH(83mL)を加えて1晩撹拌を行った後に濾過を行い、次いで、沈殿をEtOH(30mL)で洗浄した。次いで、沈殿を乾燥させることで、脱脂卵黄(Delipidated Egg Yolk)が3g得られた。
参考例1で得られたジシアロ糖鎖アスパラギン混合物(120mg)を、水(1.5mL)に溶かし、炭酸水素ナトリウム(26mg)を加えた。さらに、Fmoc-OSu〔N-(9-Fluorenylmethyloxycarbonyl)oxysuccinimide〕(68mg)を溶かしたジメチルホルムアミド(DMF、2.5mL)を加えた後、室温で2時間反応させた。原料消失をTLCで確認後、エバポレーターを用いて濃縮した。残渣に、水(15mL)、ジエチルエーテル(25mL)を加えて10分間撹拌した。次いで、ジエチルエーテル層を除いた後、水層をジエチルエーテル(15mL)で洗浄し、さらに、濃縮後、凍結乾燥を行った。次いで、得られた残留物を、ODSカラム(ワコーゲル100C18)を用い、グラジエントをかけて精製した。糖鎖が含まれている画分を回収し、濃縮後、凍結乾燥を行った。得られた残留物をHPLC分取カラムにて精製した(YMC-Pack R&D ODS、D-ODS-5-A、20×250mm、アセトニトリル/25mM 酢酸アンモニウム水溶液=20/80、7.5mL/min)。約15分後に出てくるメインピークを分取後、濃縮した。次いで、ODSカラムにて脱塩処理を行った。凍結乾燥し、目的とする、Fmoc基でアスパラギンのアミノ基窒素が保護された糖鎖アスパラギン化合物である、ジシアロ糖鎖アスパラギン‐Fmocが、13.3mg得られた。
HPLC分析条件(ODS):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A85%→A75%(20分)→A5%(25分)→A85%(45分))
HPLC精製条件:(CAPCELL PAK C18 UG120 250×20mm、流速 7.0mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A80%→A80%(5分)→A75%(25分)→A10%(30分)→A80%(45分))
HPLC分析条件(ODS):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A85%→A75%(20分)→A5%(25分)→A85%(45分))
HPLC精製条件:(CAPCELL PAK C18 UG120 250×20mm、流速 7.0mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A80%→A80%(5分)→A75%(25分)→A10%(30分)→A80%(45分))
HPLC分析条件:(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、アイソクラティック(A:80%、B:20%)
HPLC精製条件:(SP-300―5-ODS-BIO 250×30mm、流速 25mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A95%→A95%(10分)→A85%(10.1分)→A82%(40分)
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(5mg、2.0μmol)を水に溶解し、10.0mLに定容した。定容した糖鎖水溶液後10μLをHPLCにインジェクションして分析した。その結果、23分付近に溶出するジシアロ糖鎖アスパラギン-Fmocピーク(94.9%)の後方24分付近に溶出する同質量を示す別のピーク(3.7%)を確認した(図1)。参考例3、4、5で調製したα2,3-シアル酸を含有するジシアロ糖鎖とHPLC上での保持時間を比較した結果、24分付近に溶出したピークはGT-25034、GT-25035と一致した(図2)。
HPLC分析条件:(Asahipak NH2P-50 4E 5μm 250×4.6mm、流速 0.70mL/min、移動相A:0.5% リン酸水溶液、B:0.5%リン酸含有 90%アセトニトリル水溶液、グラジエント A25%→A75%(25分)→A90%(26分)→A90%(28分)→A25%(29分)→A25%(45分))
24分付近に溶出したピークのESI-MS:Calcd for C103H154N8O66[M+H]+ 2559.89、 [M+2H]+2 1280.45、[M+3H]+3 853.96、found 1280.44、853.95.
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(200mg)を水(4mL)に溶解した後、アセトニトリル(12mL)で希釈した。希釈後、薄く白濁した糖鎖水溶液をHPLCによって精製し、凍結乾燥した。(HPLC精製条件)凍結乾燥後、ODS担体にて脱塩することによって、不純物精製品(2.4mg)を得た(図3)。
得られた不純物精製品を参考例2、3、4、5によって調製された糖鎖と比較分析した結果、GT-25034、GT-25035がそれぞれ一致した(図4)。
HPLC精製条件:(Asahipak NH2P-90 20F 300×20mm、流速 7mL/min、移動相A:0.5%リン酸水溶液、B:0.5%リン酸含有 90%アセトニトリル水溶液、グラジエントA25%→A25%(5分)→A75%(60分)
HPLC分析条件(ODS(1)):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、アイソクラティック(A:80%、B:20%)
HPLC分析条件(ODS(2)):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、アイソクラティック(A:82%、B:18%)
HPLC分析条件(HILIC):(Asahipak NH2P-50 4E 5μm 250×4.6mm、流速 0.70mL/min、移動相A:0.5%リン酸水溶液、B:0.5%リン酸含有 90%アセトニトリル水溶液、グラジエント A25%→A75%(25分)→A90%(26分)→A90%(28分)→A25%(29分)→A25%(45分))
実施例2で調製した不純物をシアル酸加水分解酵素によって分解した。
HPLC分析条件(ODS):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル アイソクラティック(A:80%、B:20%)
GT-25001をシアル酸加水分解酵素によって分解した。
一方で、同様に水(5μL)に溶解したGT-25001(50μg)に100mM 酢酸ナトリウム水溶液(44μL)、α2,3-2,6-2,8-シアリダーゼ(10mUnit、Neuraminidase、サンヨーファイン)を加えて37℃で反応させた。1.5時間後、反応溶液(10μL)を水(90μL)で希釈し、10μLをインジェクションすることでHPLC分析した。HPLC分析の結果、11分の原料ピークが完全に消失し、17.5分に新しいピークの生成を確認した。質量分析の結果、生成した新しいピークは、GT-25001からシアル酸2残基が切断されたアシアロ体であることが確認された(図6)。
HPLC分析条件(ODS):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、アイソクラティック(A:80%、B:20%)
GT-25025をシアル酸加水分解酵素によって分解した。
HPLC分析条件(ODS):(CAPCELL PAK C18 UG120 250×4.6mm、流速 0.70mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、アイソクラティック(A:80%、B:20%)
原料として複数の製造ロットの脱脂卵黄から、ジシアロ糖鎖アスパラギン-Fmocを参考例1、2に従って調製した。得られたジシアロ糖鎖アスパラギン-Fmoc(5mg、2.0μmol)を水に溶解し、10.0mLに定容した。定容した糖鎖水溶液後10μLをHPLCにインジェクションして分析した。その結果、全てのロットにおいて、不純物であるGT-25034、GT-25035に相当する24分付近に溶出するピークを約3.5%から5.0%の範囲で含むことを確認した(図8)。
HPLC分析条件:(Asahipak NH2P-50 4E 5μm 250×4.6mm、流速 0.70mL/min、移動相A:0.5%リン酸水溶液、B:0.5%リン酸含有 90%アセトニトリル水溶液、グラジエント A25%→A75%(25分)→A90%(26分)→A90%(28分)→A25%(29分)→A25%(45分))
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(50mg、20μmol)を75%アセトニトリル溶液(2.5mL)に溶解した。HPLCカラムにインジェクションし、不純物であるGT-25034、GT-25035が混入しないように精製を行った。GT-25001を含む画分を脱塩することによって、GT-25034、GT-25035の混入が0.2%であるGT-25001(36mg、14μmol、収率70%)を得た。
HPLC分取条件:(Asahipak NH2P-90 20F 300×20mm、流速 8mL/min、移動相A:5%酢酸/3%トリエチルアミン含有水溶液、B:2%酢酸酸含有 アセトニトリル溶液、グラジエントA25%→A25%(5分)→A65%(5.1~65分)
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(2g)を100mM 酢酸ナトリウムおよび10mM 塩化カルシウムを含む緩衝液(pH=5.5、20mL)に溶解し、α2,3-シアリダーゼ(2Unit、TAKARA、4455)を加えて37℃で反応させた。16時間後、反応溶液(1μL)を水(50μL)で希釈した後、アセトニトリル(50μL)を加え、20μLをインジェクションすることでHPLC分析した。HPLC分析の結果、32分のピーク(GT-25001)は変化することなく、27分のピーク(GT-25034、GT-25035混合物)が完全に消失し、11分に新しいピークの生成を確認した。質量分析の結果、生成した新しいピークはGT-25034、GT-25035からシアル酸1残基が切断されたモノシアロ体であることが確認された(図9)。
HPLC分析条件:(Asahipak NH2P-50 4E 5μm 250×4.6mm、流速 0.70mL/min、移動相A:5%酢酸、3%トリエチルアミン含有水溶液、B:2%酢酸含有アセトニトリル、アイソクラティック(A:60%、B:40%)
HPLC分取条件:(SP-300-5-ODS-BIO 5μm 250×30mm、流速 25mL/min、移動相A:25mM 酢酸アンモニウム水溶液、B:アセトニトリル、グラジエント A90%→A80%(30分)
ESI-MS:Calcd for C103H154N8O66[M+H]+ 2559.89,[M+2H]+2 1280.45,[M+3H]+3 853.96, found 1280.44, 853.95.
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(50mg)に500mM HOBt、500mM DICを加え、室温で1時間反応させた。1時間後、反応溶液(10μL)をアセトニトリル/水混液(7:3,90μL)で希釈した後、5μLをインジェクションすることでHPLC分析した。HPLC分析の結果、28分のピーク(GT-25001)は大きく変化することなく、24分のピーク(GT-25034、GT-25035混合物)が完全に消失したことを確認した(図11)。
HPLC分取条件:(CAPCELL PAK UG120 C18 5μm 250×4.6mm、流速0.7mL/min 展開溶媒A:水/トリフルオロ酢酸(1000:1)、B:アセトニトリル/トリフルオロ酢酸(1000:1) グラジエントA99%→A70%(30分)
HPLC分析取条件:(ACQUITY UPLC Glycan BEH Amide、1.7μm 150×2.1mm、流速0.35mL/min、移動相A:50mM ギ酸アンモニウム(pH4.4)、B:アセトニトリル、グラジエントA30%→A30%(66分)
参考例2で得られたジシアロ糖鎖アスパラギン-Fmoc(25mg)にNMP/DMF/水(84:15:1)(250μL)を加え、40℃で1時間撹拌し、溶解させた。1時間後、ベンジルブロミド(8.6μL、3.6当量)を加え、40℃で撹拌した。6時間後、1M 炭酸ナトリウム(50μL)を加え、室温で2時間撹拌した後、ODSカラムで精製した。固相抽出により脱塩した後、凍結乾燥を行い、シアル酸がBn化されたGT-25001を2.5mg得た。不純物除去の確認のため、得られたシアル酸がBn化されたGT-25001(1mg)に100mM 水酸化ナトリウム(10μL)を加え、40℃で1時間反応させ、Bn基及びFmoc基を脱保護した。その後、1M 炭酸水素ナトリウム(10μL)、アセトニトリル(20μL)、Fmoc-OSu(2.4mg)を加え、再Fmoc化を行った。この溶液を固相抽出し、夾雑物を除去した後、減圧濃縮した。濃縮液に水を加え、試料溶液とした。試料溶液を分析した結果、24分のピーク(GT-25034、GT-25035混合物)が完全に消失したことを確認した(図12)。
HPLC分取条件:(CAPCELL PAK UG120 C18 5μm 250×20mm、流速 7.0mL/min 展開溶媒A:25mM酢酸アンモニウム、B:アセトニトリル グラジエントA75%→A70%(30分)
HPLC分析取条件:(ACQUITY UPLC Glycan BEH Amide、1.7μm 150×2.1mm、流速0.35mL/min、移動相A:50mM ギ酸アンモニウム(pH4.4)、B:アセトニトリル、グラジエントA30%→A30%(66分)
SGP(TCI社製、S0523、2mg、1.6μmol)を100mM 酢酸ナトリウム緩衝液(pH5.5)に溶かし、α2,3-シアリダーゼ(0.5U/mU,TAKARA,4455)を2μL加え、37℃で2時間反応し、精製することで、不純物を除去したSGP(0.6mg、収率33%)を得た。不純物を除去したSGPに水を加え2mg/mLに調整し、SGP水溶液とした。SGP水溶液(7.5μL)に水(15.3μL)、5% RapiGest溶液(6μL)を加え、90℃で3分間インキュベートした。溶液を室温に戻し、Rapid PNGase(1.2μL)を加え、50℃で3分間インキュベートした。この溶液にGlycoWorks RapiFluor-MS標識化試薬(12μL)を加え、室温で5分間静置した。この溶液にアセトニトリル(358μL)を加え希釈し、GlycoWorks HILIC μElution Plateを用いてRFMS標識化糖鎖を固相抽出し、凍結乾燥後に溶媒に再溶解して試料溶液とした。試料溶液を分析した結果、α2,6/α2,3及びα2,3/α2,6に由来する不純物の消失を確認した(図13)。
HPLC分取取条件:(CAPCELL PAK UG120 C18 5μm 250×4.6mm、流速0.7mL/min 展開溶媒A:水/トリフルオロ酢酸(1000:1)、B:アセトニトリル/トリフルオロ酢酸(1000:1) グラジエントA99%→A70%(30分)
HPLC分析取条件:(ACQUITY UPLC Glycan BEH Amide、1.7μm 150×2.1mm、流速0.35mL/min、移動相A:50mM ギ酸アンモニウム(pH4.4)、B:アセトニトリル、グラジエントA25%→A31%(66分)
Claims (25)
- 鶏卵由来の糖鎖抽出物から、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を高純度で含む組成物を製造する方法であって、
前記鶏卵由来の糖鎖抽出物において、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を富化する処理を行うことを特徴とする、
製造方法。 - 請求項1に記載の製造方法であって、
前記糖鎖は、ジシアロ糖鎖である、
製造方法。 - 請求項1に記載の製造方法であって、
前記糖鎖は、下記の化合物:
の形態である、
製造方法。 - 請求項1に記載の製造方法であって、
前記富化する処理は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖と分離することを含む、
製造方法。 - 請求項4に記載の製造方法であって、
前記分離は、液体クロマトグラフィーによって行う、
製造方法。 - 請求項1に記載の製造方法であって、
前記富化する処理は、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を酵素処理または酸加水分解による処理することを含む、
製造方法。 - 請求項6に記載の製造方法であって、
前記酵素処理は、α2,3シアリダーゼによる処理を含む、
製造方法。 - 請求項1に記載の製造方法であって、
前記富化する処理は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖またはいずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖の誘導体化を含む、
製造方法。 - 請求項1に記載の製造方法であって、
糖鎖に脂溶性の置換基を導入することをさらに含む、
製造方法。 - 請求項9に記載の製造方法であって、
脂溶性の置換基の導入方法は、シアル酸カルボキシ基のエステル化、チオエステル化、アミド化、またはヒドラジド化である、
製造方法。 - 請求項9に記載の製造方法であって、
脂溶性の置換基がシアル酸のカルボン酸に導入されたベンジル基である、
製造方法。 - 請求項1から11のいずれか1項に記載の製造方法によって製造された組成物。
- 全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖から実質的になる組成物。
- 請求項13に記載の組成物であって、
前記糖鎖は、ジシアロ糖鎖である、
製造方法。 - 請求項13に記載の製造方法であって、
前記糖鎖は、下記の化合物:
の形態である、
組成物。 - 請求項13に記載の組成物であって、
全糖鎖のうちの少なくとも97%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。 - 請求項13に記載の組成物であって、
全糖鎖のうちの少なくとも98%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。 - 請求項13に記載の組成物であって、
全糖鎖のうちの少なくとも99%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖である、
組成物。 - 請求項13に記載の組成物であって、
全糖鎖のうちの少なくとも95%は、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖であり、かつ
いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を全糖鎖の2%未満で含む、
組成物。 - 全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖といずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖とを含む糖鎖混合物から、全ての非還元末端にα2,6結合型のシアル酸を有する糖鎖を高純度で含む組成物を製造する方法であって、
前記糖鎖混合物を、以下:
(a)HILICカラムを用いた液体クロマトグラフィーに供すること
(b)非還元末端のいずれかにα2,3結合型のシアル酸を有する糖鎖を分解または変性させた後に、液体クロマトグラフィーに供すること;または
(c)全ての非還元末端のα2,6結合型のシアル酸を有する糖鎖を誘導体化させた後に、液体クロマトグラフィーに供すること
により、前記糖鎖を精製することを特徴とする、
方法。 - 請求項20に記載の製造方法であって、
前記糖鎖は、ジシアロ糖鎖である、
製造方法。 - 請求項20に記載の製造方法であって、
前記糖鎖は、下記の化合物:
の形態である、
製造方法。 - 請求項20に記載の製造方法であって、
前記分解は、いずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖を酵素処理または酸加水分解による処理することを含む、
製造方法。 - 請求項23に記載の製造方法であって、
前記酵素処理は、α2,3シアリダーゼによる処理を含む、
製造方法。 - 請求項20に記載の製造方法であって、
前記変性は、全ての非還元末端のα2,6結合型のシアル酸を有する糖鎖またはいずれかの非還元末端にα2,3結合型のシアル酸を有する糖鎖のいずれかまたは両方を誘導体化することを含む、
製造方法。
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| JP2003128703A (ja) | 2001-06-19 | 2003-05-08 | Yasuhiro Kajiwara | 糖鎖アスパラギン誘導体の製造方法 |
| JP2011162762A (ja) | 2009-09-03 | 2011-08-25 | Asahi Kasei Corp | 11糖シアリルオリゴ糖ペプチドの製造方法 |
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| JP2011162762A (ja) | 2009-09-03 | 2011-08-25 | Asahi Kasei Corp | 11糖シアリルオリゴ糖ペプチドの製造方法 |
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| EP4524252A4 (en) | 2026-05-27 |
| JPWO2023219065A1 (ja) | 2023-11-16 |
| TW202409294A (zh) | 2024-03-01 |
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| CN119343461A (zh) | 2025-01-21 |
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