WO2004056895A1 - ラテックス粒子およびその製造方法 - Google Patents
ラテックス粒子およびその製造方法 Download PDFInfo
- Publication number
- WO2004056895A1 WO2004056895A1 PCT/JP2003/016326 JP0316326W WO2004056895A1 WO 2004056895 A1 WO2004056895 A1 WO 2004056895A1 JP 0316326 W JP0316326 W JP 0316326W WO 2004056895 A1 WO2004056895 A1 WO 2004056895A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- latex
- particles
- segment
- latex particles
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/285—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety
- C08F220/286—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
Definitions
- the present invention mainly relates to magnetic particles or label-containing latex polymer particles that can be used in the technical fields of detection and diagnosis of biological components, and a method for producing these particles.
- the inorganic layer containing inorganic metal which has been used for the detection and diagnosis of conventional biological components, is an organic layer in which a hydrophobic vinyl aromatic monomer (and may optionally contain a comonomer) and magnetic particles are dispersed. And an aqueous solution containing an emulsifier.
- emulsion polymerization is carried out in the presence of a water-insoluble organic compound (for example, see Patent Document 1).
- the magnetic particles synthesized by the method described in Patent Document 1 are ⁇ magnetic particles having a shape in which a magnetic substance is coated with a polymer, and having different sizes due to the difference in the particle diameter of the core magnetic substance. For this reason, it is difficult to uniformly control the size of the magnetic particles, and it is particularly difficult to control the size of the magnetic material within the range of 0.1 to 1.0 m.
- the synthesis operation is very complicated. ”As a result, latex polymer particles, which are polystyrene or styrene-butadiene copolymers, are swollen in advance using an organic solvent and heat, and a magnetic substance or a fluorescent substance is first added. The latex polymer particles are added to the A method of embedding a fluorescent substance or the like in the vicinity of the layer has been provided (for example, Patent Document 2).
- Patent Document 1 there may be a disadvantage associated with the method of encapsulating magnetic particles in latex polymer particles, or the encapsulation of a magnetic substance or a fluorescent substance in latex polymer particles or Embedding is a method in which most of the swollen polymer particles are brought into contact with an aqueous solution of a phosphor or the like (if necessary, a chelating compound) to mix or incorporate the phosphor into the polymer particles or microspheres. (For example, see Patent Documents 3 and 4).
- Patent Document 3 discloses that a hydrophobic monomer such as styrene is used to enhance the stability of latex polymer particles in an aqueous solution and to fix a physiologically reactive species to the polymer particles by covalent bond or absorption. Further, latex polymer particles obtained by using a nonionic water-soluble monomer such as acrylamide and an anionic monomer such as acrylic acid are described.
- Patent Document 4 discloses that, in addition to having excellent stability in an aqueous medium, a functional substance such as a protein can be stably immobilized by chemical bonding, and non-specific adsorption of a protein or the like occurs.
- a macromer consisting of a poly (oxyalkylene) segment having a polymerizable ethylenic group at one end and an active ester group at the other end is a styrene monomer for the purpose of providing a difficult reactive microsphere. And so on.
- Patent Document 2 Japanese Patent Application Laid-Open No. 56-164503 (refer to page 2, lower right column, line 2-14). [Patent Document 2]
- Japanese Patent Application Laid-Open No. 8-13339 / 90 (especially, see page 2, left column [Claim 1], right column, lines 18-28).
- the latex polymer particles described in Patent Document 3 have improved dispersion stability in an aqueous solution, when used in a sample containing a biological fluid (for example, serum, urine, etc.), non-specificity of proteins and the like may occur. There is a tendency for mechanical adsorption to occur.
- the microspheres described in Patent Document 4 have succeeded in suppressing nonspecific adsorption of the above-mentioned proteins and the like to some extent, but are still not satisfactory, and such microspheres are not yet satisfactory. Attempts to incorporate magnetic particles or labels in the production of the microparticles (the literature does not describe or suggest such contamination) will cause aggregation between the microspheres, resulting in dispersion stability. Tends to be lacking.
- the present inventors have found that when a specific macromer and one or more types of manomoes involved in latex formation are subjected to redox polymerization in an aqueous medium, the above-mentioned aggregation is hardly caused at all, and the particle size distribution range is extremely small. It was found that latex particles having a narrow particle size were obtained. We also found that latex particles obtained in this way can reduce non-specific adsorption of proteins and the like. Was. It has also been found that such nonspecific adsorption of proteins and the like can be further reduced by using two types of macromers having distinctly different chain lengths.
- a method for producing latex polymer particles characterized in that a polymerization reaction is carried out in an aqueous medium containing the above while stirring the aqueous medium.
- a polymerization reaction (so-called seed polymerization) is carried out in the coexistence of latex particles previously formed by using the monomer described in (ii).
- polymer latex particles which can be conveniently produced by the production method, wherein the polymer latex particles have a polymerizable ethylenic group at one end, based on the total monomer weight used, With or without a hydrophobic polymer segment, a hydrophilic polymer is added to the other end.
- Mer segment (where this segment is terminated with a ligand-introducing group
- FIG. 1 is a graph showing changes in the adsorption amount of FITC-BSA with the number of washing times for each of particles A-1, A-3, B-1 and B-2. Symbols in the figure, ⁇ , biotinylated magnetic latex particles A-3, ⁇ , magnetic latex particles A-1, 1, ⁇ , biotinylated ferrite beads B-2, and X, ferrite beads B_1.
- FIG. 2 is a graph showing the change in the amount of streptavidin adsorbed depending on the number of times of washing for each of the particles A-1, A_3, B-1 and B-2.
- the symbols in the figure have the same meaning as in FIG.
- FIG. 3 is a photograph replacing the figure showing the latex particle dispersion obtained in the present invention.
- (a) is a photograph showing the state of the latex obtained using the redox initiator
- (b) is a photograph showing the state of the latex obtained using the radical initiator.
- FIG. 4 replaces the diagram showing the state of the magnetic latex obtained in Example 5. This is a micrograph (see (b), where (a) represents the state of ordinary latex particles).
- latex polymer particles means polymer particles or polymer materials capable of forming a latex in an aqueous medium
- the latex includes a rubber-based latex and a resin latex. It is a dispersion of polymer particles with water as the main dispersion medium.
- the aqueous medium means an aqueous solvent which can contain a water-miscible organic solvent, for example, ethanol, methanol, tetrahydrofuran, acetone, acetonitrile, etc., and furthermore a buffer or the like, and in a specific example, pure water.
- the surface region (shell) region of the particle is not limited, but may be a polymer chain derived from a polymerizable ethylenic group and a hydrophobic group bonded to the ethylenic group (for example, an aromatic group). Group, alkyl group, etc.) around the core of the particles, usually covered with hydrophilic polymer segments. It is understood that in the case of particles containing a magnetic substance or a label, the magnetic substance or the like is completely encapsulated or partially embedded in the core region or portion.
- “Terminated with a ligand-introducing group” means that the ligand-introducing group is present as a terminal group at the end of the hydrophilic polymer segment opposite to the polymerizable ethylenic group side.
- the ligand-introducing group means a functional group capable of covalently bonding to a ligand molecule (which may be protected as long as it can be easily removed), as in X of the general formula Ia described below.
- Ligand generally binds to a substance that specifically binds to a functional protein (eg, an antigen or hapten that binds to an antibody, a substrate that binds to an enzyme, or a receptor).
- a macromer is also called a macromonomer, and generally means a polymerizable polymer having a molecular weight of thousands to tens of thousands. However, in the present invention, a macromer is classified into an oligomer having a molecular weight of several hundreds or less when appropriate. Also included.
- the macromer used in the present invention has a polymerizable ethylenic group at one end, and a hydrophilic polymer segment (here, at the other end) with or without a hydrophobic polymer segment.
- This segment may be terminated with a ligand-introducing group.
- the “polymerizable ethylenic group” refers to a group that can be polymerized by a radical polymerization initiator and a redox initiator. Examples of such a residue include (meth) atalyloyl, an aromatic ring-substituted or unsubstituted benzyl, a phenyl, and the like.
- hydrophobic polymer segment By “with or without a hydrophobic polymer segment” is meant that the macromer optionally has a hydrophobic polymer segment and can be a so-called block copolymer.
- a segment is understood to be a segment derived from a polymer chain in which an independent polymer corresponding to the segment is sparingly soluble or insoluble in water.
- hydrophobic segments include, but are not limited to, poly (lactide) chains, poly ( ⁇ -force prolatataton) chains, poly (c3 ⁇ 4 and / or] 3-benzylaspartate) Chain, poly ( ⁇ -benzyl Glutamic acid) chains.
- the hydrophilic polymer segment which is an essential segment of the macromer, is a segment derived from a polymer chain in which the corresponding independent polymer becomes soluble in water.
- a hydrophilic segment is preferably non-ionic and is not limited, but may be poly (ethylene glycol) [hereinafter sometimes abbreviated as PEG; poly (oxechylene) or A term compatible with poly (ethylene oxide). ], Poly (vinyl alcohol), poly (bulpyrrolidone), poly (dextran), poly (dextrin), gelatin, etc. derived from the main chain.
- PEG poly (ethylene glycol)
- PEG poly (oxechylene)
- PEG is particularly preferred.
- the macromer has a ligand-introducing group as described above, and such a group or a part thereof includes a hydroxyl group, a carboxyl group, a sulfo group, an aldehyde group, an amino group, an imino group, a mercapto group, and an active ester.
- a group or a part thereof includes a hydroxyl group, a carboxyl group, a sulfo group, an aldehyde group, an amino group, an imino group, a mercapto group, and an active ester.
- a group selected from the group consisting of iC alkoxyl group for example, methoxy, ethoxy, propoxy, iso-propoxy, etc.
- CH 2 C— L 1- (B) — L 2 — (CH 2 CH 2 0) — X (I) where R is a hydrogen atom or 1 to 3 carbon atoms , For example, methyl, ethyl, propyl, etc.)
- L 2 represents an oxygen atom, a C 4 alkylene, a carbonyl, an imino, or a linking group formed by combining two or more of these;
- X represents a hydroxyl group, a carboxyl group, a sulfo group, an aldehyde group, an amino group, an imino group, or an active ester type bonded with or without (CH 2 ) b or CO (CH 2 ) b. Hydroxy group, o Protected amino groups, active ester type protected
- the first such macromer is represented by the following general formula (Ia).
- Examples of the second macromer include those represented by the following general formula (I-b).
- R and L have the same meanings as defined for the above general formula (I-a), and Y may be substituted with a hydrogen atom or a halogen atom (fluorine, chlorine, or bromine)
- a halogen atom fluorine, chlorine, or bromine
- the macromer described above has a hydrophilic polymer segment having a poly (ethylene glycol) chain according to the method described in US Pat. No. 5,925,720 or WO 96/33233. , Or by appropriately improving those methods.
- Other macromers are provided by linking the hydrophilic polymer segment and, if present, the polymer corresponding to the hydrophobic polymer segment, respectively, by methods well known to those skilled in the art, and modifying both termini as appropriate with the desired groups. Just fine.
- the polymer latex particles obtained by simultaneously using the macromer represented by the general formula (I-a) and the macromer represented by the general formula ( ⁇ -b) are capable of treating non-specific substances such as proteins on the surface thereof. It is preferable that the adsorption can be significantly suppressed.
- the ratio of the macromer of the general formula (I-a) to the macromer of the general formula (I-b) is 1: 5000 to 5000: 1, preferably 1: 3000 to 3000: 1, particularly preferably 1: 1. 00 ⁇ ; 1 000: 1
- the monomer involved in latex formation can be used in the present invention irrespective of its type as long as it is a monomer capable of forming polymer latex particles when polymerized together with at least the above monomers.
- monomers include, but are not limited to, hydrophobic butyl monomers, especially butyl aromatic compounds, such as substituted or unsubstituted styrene, 1-vinyl naphthalene, more specifically styrene, t- Methylstyrene, ethyl Examples thereof include styrene, p-bromostyrene, bienoletolenene, and t-butynolestyrene.
- C i-C alkyl (meth) acrylates such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate; , C! -C 6 alkyl or halogen atom substituted) or unsubstituted conjugated diene such as butadiene and isoprene.
- styrene is preferred in terms of cost and hardness as a characteristic thereof.
- latex particles may be coexisted by forming latex particles in advance when copolymerizing at least the monomer.
- Such polymerization modes per se are known in the art as seed polymerization and are suitable for forming larger particles.
- the latex particles can be uniformly dispersed by a so-called saw press and a stable latex can be obtained due to the presence of the macromer as described above.
- the latex particles thus obtained consist essentially of the monomers involved in latex formation (ie, at least 95%, preferably at least 98%, of the monomers).
- the remaining monomers polymerize in or on the latex particles, and the macromers, if any, partially polymerize in the latex particles, and those in which the hydrophilic segment of the macromer is present on the surface. Is understood.
- R represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- Z represents a group selected from the group consisting of a hydrogen atom, an amino group, a mono- or di-Ci-Cg alkylamino group, a carboxyl group, a cyano group, an amide group, a urethane group and a rare group.
- the polymer tex particles provided by the present invention may contain a polymer chain derived from the macromer, the monomer involved in the latex form, and the monomer represented by the general formula ( ⁇ ). Specific examples of these monomers include getylaminoethyl methacrylate, p-butylbenzoic acid, atalylamide, methacrylic acid, and the like.
- the monomer of the general formula (II) is allowed to coexist and polymerized to produce the desired polymer latex particles.
- a magnetic substance Alternatively, a label may coexist. Examples of such a magnetic material include fine particles such as ferrite and neodymium. If the magnetic material does not adversely affect the polymerization reaction, the particles may be prepared in a polymerization reaction system.
- Labels include, but are not limited to, compounds or microparticles that help identify polymer latex particles by some means, such as optically or otherwise, including, but not limited to, europium (Eu) and terbium (Tb).
- the term “fine particles” refers to particles having an average particle diameter of the order of nanometers (nm). The use of these particles, especially magnetic materials, whose surface has been hydrophobized, increases the mixing ratio of latex particles and increases the stability of the encapsulated magnetic material in latex particles.
- Such a hydrophobizing treatment is performed, for example, by adsorbing a compound having an ethylenic group capable of polymerizing with a hydrophobic group such as vinyl benzoate or methacrylic acid (trimethoxysilylpropyl) to the ferrite surface. Modifications can be mentioned.
- the polymerization may be performed under any conditions so long as the latex particles formed through the polymerization reaction have a uniform particle size and do not aggregate with each other.
- the polymerization can usually be carried out using a radical initiator, but the latex particles formed may aggregate. If a redox initiator is used instead of the radical initiator, latex particles having a uniform particle size and containing little or no aggregates can be obtained, so it is preferable to carry out the polymerization using the redox initiator. .
- redot initiators include peracids and amines, such as benzoyl peroxide And New, Nyu- Jimechirua diphosphate systems, persulfate Anmoniumu sulfite sodium systems, persulfate Anmoniumu and Fe (N0 3) 2 systems, such as Ru can be given.
- peracids and amines such as benzoyl peroxide And New, Nyu- Jimechirua diphosphate systems, persulfate Anmoniumu sulfite sodium systems, persulfate Anmoniumu and Fe (N0 3) 2 systems, such as Ru can be given.
- the polymerization reaction is carried out in the presence of a monomer, macromer, and optionally a monomer of the general formula ( ⁇ ), a magnetic substance or a labeling initiator involved in the formation of the latex in an aqueous medium, and if necessary, heating (about 100 ° C).
- this reaction system is usually placed in an inert atmosphere such as argon or nitrogen at ambient temperature without heating.
- the latex-forming monomer in the aqueous medium is conveniently chosen to be 0.1 to 50% by weight.
- the order of preparing the above reaction system may be any order as long as the polymerization reaction can proceed, and is not limited, but preferably follows the examples described later.
- the optimum reaction time varies depending on the reaction temperature and the type of monomer, but is generally preferably 24 hours.
- Radical initiators are those which can be used by conventional initiators without limitation. S, typically 2,2'-azo'bis'isobutyronitrile ( ⁇ ⁇ ⁇ ), 2, 2 ' Azo compounds such as —azobis [2- (2-imidazoline-1-yl) propane], 2,2, -azobis (2-methylbutyronitrile), benzoyl peroxide, t-butyl hydroperoxide, Organic peroxides such as diisopropyl peroxy dicarbonate can be mentioned.
- Such initiators against the number of moles of the total monomers (including macromers), 0.00 1-1 0 mole 0/0, preferably can have use as a 1-5 mole 0/0.
- redox initiators such as described above, 0. 00 with respect to the number of moles of the total monomer one: 1 0 mole 0/0, preferably from 0.1 to 1 mole 0/0 is used.
- the latex polymer particles thus produced can be purified using centrifugation, sedimentation, dialysis, ultrafiltration, gel filtration, etc., alone or in combination.
- the latex polymer particles thus obtained for example, particles having a unit derived from a reactive PEG macromer, if necessary, after elimination of a protecting group (for example, acetal), can be obtained by a reaction known per se.
- a protecting group for example, acetal
- the above-mentioned ligands for example, antibodies, antigens, haptens, lectins, sugars, biotins and the like can be immobilized on the particles via covalent bonds.
- the monomer, per total monomer weight, macromer from 0.5 to 9 9.5 weight 0 /. 0.5 to 99.5% by weight of monomers involved in latex formation (latex particles may be formed in advance using 3 to 97% by weight, preferably 5 to 90% by weight), and the like. It can be used in a proportion of 0 to 95% by weight of the monomer of formula (II) (0.5 to 95% by weight, if present). Further, a crosslinking agent may be included if necessary.
- the amount of the macromer of the general formula (I-a) is preferably 90% by weight or less, and more preferably 80 to 3% by weight, from the viewpoints of particle dispersibility and non-adsorption properties.
- the amount of the macromer of the general formula (I-Ib) is not more than 80% by weight, preferably 70 to 2% by weight, more preferably 50 to 5% by weight.
- the amount is 9 5 wt% or less, preferably 9 0-1 0% by weight, more preferably 8 0-2 0 weight is good it is 0/0.
- these fine particles can be mixed or included in the polymer latex particles. These fine particles are used in an amount of 0.00 :! to 90% by weight, preferably 0.1 to 60% by weight, particularly preferably 1 to 2% by weight based on the total monomer weight. It can coexist at 0% by weight.
- the fine particles can be introduced into the latex particles.
- the latex particles are immersed in a liquid containing the fine particles and capable of swelling the latex particles (referred to as a first liquid), and then the latex particles are contracted to introduce the property-imparting particles into the latex particles. It can also be done.
- the latex particles shrink the latex particles can be immersed in a liquid having a property of shrinking the latex particles (referred to as a second liquid) to promote the shrinkage.
- the first liquid is an acidic liquid
- the second liquid is an alkaline liquid. Liquid. That is, when the fine particles are contained in an acidic liquid and the latex particles are immersed in the acidic liquid, the latex particles swell. During swelling, the fine particles penetrate into the particles. Thereafter, when the latex particles are immersed in an alkaline liquid, the latex particles contract, and the latex particles—the fine particles are held or fixed.
- a water / aceton mixed solvent can be used as the first liquid.
- the fine particles are previously contained in a water / acetone mixed solvent, and latex particles are immersed in the mixed liquid.
- the latex particles swell during immersion, and the fine particles are mixed in the swollen latex particles.
- the latex particles are dried and the mixed solvent of water and acetone is removed, whereby the first particles (the particles imparting properties) can be held or fixed in the latex particles.
- Polymer latex particles having a ligand covalently bonded thereto through a ligand introducing group to be present can also be provided. These particles can be used as a diagnostic agent for clinical diagnosis or as an affinity carrier for isolating and purifying a specific molecule existing in a living body.
- latex particles using the macromer of the general formula (I-a) and the macromer of the general formula (I-b) as macromers are used to form non-specific substances such as contaminating proteins on their surfaces. This is preferable because adsorption can be hardly or completely prevented.
- ethylene oxide 11.2 mL, 228 mmol, charged molecular weight: 50,000
- EO ethylene oxide
- GPC GPC measurement
- the reaction may be performed by adding a solution obtained by adding triethylamine (1.39 mL, 10 mmol) to the reaction solution after the EO polymerization. The solution was stopped by dropping the solution over a period of 30 minutes for 65 mL, 6 mmo 1) / THF (20 mL).
- VB-PEG-MS was obtained.
- a 28% aqueous ammonia solution 200 mL, approximately 1500-fold molar amount
- ammonia was removed and the solution was concentrated using an evaporator.
- the concentrated solution is purified by dialysis against distilled water (dialysis membrane: MWCO 1000 (manufactured by Spectrum Laboratory), distilled water is changed 5 times for 2 days), and then freeze-dried As a result, VB—PEG—NH 2 (or compound 1) was obtained.
- reaction mixture solution was poured into isopropyl alcohol cooled to 115 ° C to precipitate the macromer, followed by centrifugation (6000 rpm, 40 minutes, 110 ° C) to obtain the macromer (compound 2). ) was recovered and freeze-dried to remove the solvent.
- the obtained compound (compound 2 or VB-PEG-OH) is determined by gel permeation chromatography (GPC) (Tosoh HLC-8020) and nuclei under the measurement conditions described above. It was confirmed with a magnetic resonance measurement device (JEOL EX-400 (40 OMHz) manufactured by JEOL Ltd.).
- the introduction rate of the bullet group was calculated from the 1 H-NMR spectrum, and was almost quantitative. Confirmed that it has been introduced.
- THF was added to and dissolved in a vessel under an argon atmosphere containing naphthalene, and a columnar force rim of 1.0-fold molar amount with respect to naphthalene was added thereto under ice-cooling, followed by stirring for 1 day.
- This solution was titrated with hydrochloric acid to prepare a 0.3263 M potassium-naphthalene / THF solution.
- TH F 4 O ml, 3,3'-Jetoxy 1 1 —Propanol 0.32 ml (2 mm o 1) is added to a vessel under an argon atmosphere at room temperature, and 0.326 3 M potassium hydroxide is added.
- a naphthalene / THF solution (6.2 mL, 2 mmo 1) was added and stirred for 15 minutes to obtain a potassium alkoxide solution.
- To this solution was added 11.3 mL (0.23 m 01) of ethylene oxide using a cooled syringe, and the mixture was stirred at room temperature for 2 days to perform ring-opening polymerization to synthesize acetal-PEG-OH. did.
- the obtained compound is the target compound by gel permeation chromatography (GPC) (HLC-8020 manufactured by Tosoh) and a nuclear magnetic resonance analyzer (JEOL EX manufactured by JEOL Ltd.) — 400 (40 OMHz)). From the results of GPC, the molecular weight of the PEG chain was 550, and the molecular weight distribution Mw / Mn was 1.03.
- GPC gel permeation chromatography
- the molecular weight of the lactide chain (PLA) of acetal-PEG / PLA-methacryloyl is 150, calculated from the molecular weight of the PEG chain and the 1 H-NMR spectrum obtained by GPC.
- the introduction rate of the beer group was calculated from the ifl-NMR spectrum, and it was confirmed that the introduction was almost quantitative.
- VB PEG—NH 2 (0.5 g, repeat unit (CH 2 CH 20 ) obtained above) in a reaction vessel containing an aqueous solution of polyvinyl alcohol (PVA) (40 mL): equivalent to 130 to 140 units ), poly (ethylene glycidyl co Lumpur) methyl ether methacrylate rate 50 wt% aqueous solution (Aldori Tutsi, molecular weight: 2, 000, 4. 8mL, 0.
- PVA polyvinyl alcohol
- the supernatant was removed, and the precipitated magnetic latex particles A-2 were dispersed again in distilled water. Thereafter, DLS measurement was performed on the solution in which the supernatant and the precipitate were dispersed, and as a result, the particle size of the magnetic latex particles A-2 was 0.51 ⁇ m.
- Magnetic latex particles A-12 (concentration: 2.5 mg / mL) purified by centrifugation and separation using a magnet, and commercially available ferrite beads B-1 with a carboxylic acid surface group (concentration: 2.5 mg / mL) 3 mL of each sample solution was prepared, and left in a spiral test tube placed on a permanent magnet. At this point, the supernatant was separated from the precipitate that was attracted to the magnet, and the supernatant was discarded. The PBS was added, and 3 mL of fresh PBS was added. The vortex (10 s, speed 8) was washed, and the operation of removing the supernatant was repeated three times. .
- the particles were rinsed with Voltex (10 s, speed 8), 2 mL of the supernatant was added with 2 mL of the BSA solution, and the mixture was incubated at 60 ° C for 1 hour.
- the absorbance at a wavelength of 562 nm was measured with a UV-Vis spectrometer.
- the adsorbed BSA concentration was calculated from a calibration curve created in advance. As a result of the calculation, the BSA adsorption amount of the magnetic latex particles was about 0.0
- biotinylated magnetic latex particles A-13 show specific adsorption or binding even after washing multiple times. While the streptavidin is adsorbed, the magnetic latex particles A-1 do not have biotin, and therefore, it can be seen that the amount of streptavidin adsorbed is almost zero by performing the washing twice. Therefore, from FIG. 2, specific adsorption or binding by biotin was observed.
- biotin-containing magnetic latex particles A-3 exhibited specific adsorption by having biotin, and non-specific adsorption could be suppressed by short-chain PEG.
- Example 4 Benzoic acid surface treated ferrite particles and acetal-PEG
- FIG. 3 A photograph replacing the figure showing the state of the latex particles obtained is submitted as Figure 3.
- (a) is the latex when the redox initiator is used
- (b) is the latex when the radical initiator is used under heating.
- FIG. 4 shows a micrograph instead of a diagram showing the dispersion state of the obtained magnetic latex particles.
- the latex particles which can provide polymer latex particles which are uniformly and stably dispersed in an aqueous medium can stably enclose a magnetic substance and the like, and can also contain non-specific substances such as contaminant proteins on the particle surface. Adsorption was significantly suppressed. Therefore, although not limited, the present invention provides clinical diagnostic agents and can be used in industries utilizing them.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004562058A JPWO2004056895A1 (ja) | 2002-12-19 | 2003-12-19 | ラテックス粒子およびその製造方法 |
EP03782831A EP1577331A1 (en) | 2002-12-19 | 2003-12-19 | Latex particles and process for producing the same |
AU2003292581A AU2003292581A1 (en) | 2002-12-19 | 2003-12-19 | Latex particles and process for producing the same |
US10/539,732 US20060100367A1 (en) | 2002-12-19 | 2003-12-19 | Latex particles and process for producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002367683 | 2002-12-19 | ||
JP2002-367683 | 2002-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004056895A1 true WO2004056895A1 (ja) | 2004-07-08 |
Family
ID=32677089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016326 WO2004056895A1 (ja) | 2002-12-19 | 2003-12-19 | ラテックス粒子およびその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060100367A1 (ja) |
EP (1) | EP1577331A1 (ja) |
JP (1) | JPWO2004056895A1 (ja) |
AU (1) | AU2003292581A1 (ja) |
WO (1) | WO2004056895A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006096985A (ja) * | 2004-08-31 | 2006-04-13 | Ricoh Co Ltd | 微粒子、微粒子の製造方法、微粒子分散液およびそれを用いた画像表示媒体、装置 |
JP2008081574A (ja) * | 2006-09-27 | 2008-04-10 | Jsr Corp | 磁性粒子およびその製造方法、ならびにプローブ結合粒子 |
JP2011084739A (ja) * | 2009-09-18 | 2011-04-28 | Tokyo Univ Of Science | リガンド固定化用共重合体及び該共重合体によるリガンドの固定化方法 |
JP2020506386A (ja) * | 2017-02-02 | 2020-02-27 | エフ.ホフマン−ラ ロシュ アーゲーF. Hoffmann−La Roche Aktiengesellschaft | 少なくとも2種のペグ化された分析物特異的結合剤を使用する免疫アッセイ |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4811565B2 (ja) * | 2005-03-31 | 2011-11-09 | Jsr株式会社 | 多孔質表面を有する磁性粒子およびその製造方法、生化学用担体、ならびにビオチン類結合用粒子 |
CN110441514B (zh) * | 2019-06-18 | 2022-11-29 | 北京利德曼生化股份有限公司 | 一种胶乳微球与抗体复合物的制备方法、产品及其应用 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045468A1 (en) * | 1996-05-28 | 1997-12-04 | Eastman Chemical Company | Surfactant-containing acetoacetoxy-functional and enamine-functional polymers |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480764B1 (fr) * | 1980-04-18 | 1985-10-04 | Rhone Poulenc Spec Chim | Latex de polymeres magnetiques et procede de preparation |
US4735907A (en) * | 1985-03-18 | 1988-04-05 | Eastman Kodak Company | Stabilized fluorescent rare earth labels and labeled physiologically reactive species |
-
2003
- 2003-12-19 JP JP2004562058A patent/JPWO2004056895A1/ja active Pending
- 2003-12-19 AU AU2003292581A patent/AU2003292581A1/en not_active Abandoned
- 2003-12-19 WO PCT/JP2003/016326 patent/WO2004056895A1/ja not_active Application Discontinuation
- 2003-12-19 EP EP03782831A patent/EP1577331A1/en not_active Withdrawn
- 2003-12-19 US US10/539,732 patent/US20060100367A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045468A1 (en) * | 1996-05-28 | 1997-12-04 | Eastman Chemical Company | Surfactant-containing acetoacetoxy-functional and enamine-functional polymers |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006096985A (ja) * | 2004-08-31 | 2006-04-13 | Ricoh Co Ltd | 微粒子、微粒子の製造方法、微粒子分散液およびそれを用いた画像表示媒体、装置 |
JP2008081574A (ja) * | 2006-09-27 | 2008-04-10 | Jsr Corp | 磁性粒子およびその製造方法、ならびにプローブ結合粒子 |
JP2011084739A (ja) * | 2009-09-18 | 2011-04-28 | Tokyo Univ Of Science | リガンド固定化用共重合体及び該共重合体によるリガンドの固定化方法 |
JP2020506386A (ja) * | 2017-02-02 | 2020-02-27 | エフ.ホフマン−ラ ロシュ アーゲーF. Hoffmann−La Roche Aktiengesellschaft | 少なくとも2種のペグ化された分析物特異的結合剤を使用する免疫アッセイ |
JP7068323B2 (ja) | 2017-02-02 | 2022-05-16 | エフ.ホフマン-ラ ロシュ アーゲー | 少なくとも2種のペグ化された分析物特異的結合剤を使用する免疫アッセイ |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004056895A1 (ja) | 2006-07-20 |
EP1577331A1 (en) | 2005-09-21 |
US20060100367A1 (en) | 2006-05-11 |
AU2003292581A1 (en) | 2004-07-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2230264B1 (en) | Particles containing multi-block polymers | |
JP4167975B2 (ja) | シグナル生成物質封入コア−シェル型粒子及びその製造方法 | |
CN100414297C (zh) | 颗粒 | |
US20090179176A1 (en) | Fluorescent substance- or contrast medium-containing latex polymer particles, and a process to produce the same | |
JP5326443B2 (ja) | 凍結乾燥可能な温度応答性磁性微粒子 | |
US8084275B2 (en) | Magnetic composite body, production method thereof, method for removing substance with mannose on its surface, and method for concentrating substance with mannose on its surface | |
US10087280B2 (en) | Dibenzosilole monomers and polymers and methods for their preparation and use | |
EP3054297A1 (en) | Fluorescence-labeled particle | |
JP2004067703A (ja) | 架橋ポリマー、微粒子および製造方法 | |
JP2007263935A (ja) | 磁性マーカー及びその製造方法 | |
WO2009145359A1 (en) | Graft polymer-containing substrate, method for producing the same, target substance-detecting element, and target substance detection kit | |
JP2016529209A (ja) | 刺激応答性磁性ナノ粒子 | |
Huang et al. | Magnetic polymer microspheres with polymer brushes and the immobilization of protein on the brushes | |
EP3054283A1 (en) | Method for detecting target substance | |
JP2003231648A (ja) | 生理活性物質担体用ポリマー粒子およびその製造方法 | |
JPWO2019088287A1 (ja) | 色素凝集粒子、色素内包粒子、および蛍光標識材 | |
WO2004056895A1 (ja) | ラテックス粒子およびその製造方法 | |
JP5035522B2 (ja) | ビニルポリマー、ブロッキング剤、およびこれを用いたプローブ結合粒子の製造方法 | |
Chang et al. | Co-assembly of CdTe and Fe3O4 with molecularly imprinted polymer for recognition and separation of endocrine disrupting chemicals | |
WO2002096977A1 (fr) | Procede de liaison d'une substance a incorporer a une terminaison polymere | |
JP2004211052A (ja) | 架橋ポリマー、ポリマー微粒子およびそれらの製造方法 | |
JPH07316466A (ja) | ポリマーで保護被覆された粒子及びその製造方法 | |
JPH08133990A (ja) | 反応性マイクロスフェアー | |
WO2005036172A1 (ja) | 生物学的被検体の高速検出方法 | |
JP2013019713A (ja) | 遺伝子物質固定化医療用粒子および遺伝子物質の捕捉方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2004562058 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 2006100367 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10539732 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003782831 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2003782831 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10539732 Country of ref document: US |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003782831 Country of ref document: EP |