JP2017173011A - Conjugated bilirubin measuring reagent - Google Patents

Conjugated bilirubin measuring reagent Download PDF

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JP2017173011A
JP2017173011A JP2016056549A JP2016056549A JP2017173011A JP 2017173011 A JP2017173011 A JP 2017173011A JP 2016056549 A JP2016056549 A JP 2016056549A JP 2016056549 A JP2016056549 A JP 2016056549A JP 2017173011 A JP2017173011 A JP 2017173011A
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bilirubin
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conjugated bilirubin
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謙太 巽
Kenta Tatsumi
謙太 巽
則子 服部
Noriko Hattori
則子 服部
直人 石橋
Naoto Ishibashi
直人 石橋
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Nipro Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a reagent which can measure conjugated bilirubin alone easily and inexpensively without measuring non-conjugated bilirubin and delta-type bilirubin.SOLUTION: A conjugated bilirubin measuring reagent includes: a p-toluenesulfonic acid as a reaction inhibitor of non-conjugated bilirubin and delta-type bilirubin; and vanadic acid ions containing pentavalent vanadium as an oxidizing agent.SELECTED DRAWING: None

Description

本発明は、生体液中の抱合型ビリルビンの測定用試薬に関する。   The present invention relates to a reagent for measuring conjugated bilirubin in a biological fluid.

ビリルビンは、テトラピロール類に属する黄色色素である。ビリルビンは、ヘムの生理的代謝産物であり、胆汁中に最も多く存在する。血液などの生体液中において、ビリルビンは、抱合型ビリルビン、非抱合型ビリルビン、及びデルタ型ビリルビンの三種類が存在し、これらを区別せずに含むものが総ビリルビンと称される。抱合型ビリルビンは、ビリルビンが肝臓中でグルクロン酸抱合を受けて生成されたものであり、グルクロン酸1分子が結合したモノグルクロナイドビリルビンと、グルクロン酸2分子が結合したジグルクロナイドビリルビンとが存在する。非抱合型ビリルビンは、グルクロン酸抱合を受けていないビリルビンである。また、デルタ型ビリルビンは、血清アルブミンと不可逆的にビリルビンが共有結合した状態で存在するビリルビンである。これら3種類のビリルビンの分別定量は、肝・胆道疾患の診断の指標として重要であると言われている。特に、抱合型ビリルビンの測定は、胆汁分泌障害の良い指標となる。   Bilirubin is a yellow pigment belonging to tetrapyrroles. Bilirubin is a physiological metabolite of heme and is most abundant in bile. In biological fluids such as blood, there are three types of bilirubin: conjugated bilirubin, unconjugated bilirubin, and delta bilirubin, and those containing these without distinction are called total bilirubin. Conjugated bilirubin is produced by glucuronidation of bilirubin in the liver. Mono-glucuronide bilirubin with 1 molecule of glucuronic acid and diglucuronide bilirubin with 2 molecules of glucuronic acid bound to each other. Exists. Unconjugated bilirubin is bilirubin that has not undergone glucuronidation. Delta-type bilirubin is bilirubin that exists in a state where bilirubin is covalently bound to serum albumin irreversibly. The fractional quantification of these three types of bilirubin is said to be important as an index for diagnosis of liver / biliary tract diseases. In particular, measurement of conjugated bilirubin is a good indicator of impaired bile secretion.

抱合型ビリルビンの測定方法として、ビリルビンオキシダーゼなどの酸化酵素を用いる方法が知られている。この測定方法においては、酸化酵素によって生体液中のビリルビンを酸化させることにより、ビリルビンが有する450nm付近の吸光度を低下させ、その吸光度の変化からビリルビンを測定する。抱合型ビリルビンに対して特異的に酸化酵素が作用する条件を設定することにより、抱合型ビリルビンを特異的に測定することができる(特許文献1参照)。   As a method for measuring conjugated bilirubin, a method using an oxidase such as bilirubin oxidase is known. In this measurement method, bilirubin in a biological fluid is oxidized by an oxidase to reduce the absorbance around 450 nm of bilirubin, and bilirubin is measured from the change in absorbance. By setting conditions under which oxidase specifically acts on conjugated bilirubin, conjugated bilirubin can be specifically measured (see Patent Document 1).

一方、生体液中のビリルビンは、ジアゾ法により反応促進剤の添加を必要としない直接型ビリルビンと、反応促進剤の添加を必要とする間接型ビリルビンとにも大別することができる。直接型ビリルビンは、血液中に存在する抱合型ビリルビン及びデルタ型ビリルビンが主に対応すると考えられている。間接型ビリルビンは、血液中に存在する非抱合型ビリルビンが主に対応すると考えられている。   On the other hand, bilirubin in biological fluids can be broadly classified into direct bilirubin that does not require the addition of a reaction accelerator by the diazo method and indirect bilirubin that requires the addition of a reaction accelerator. Direct bilirubin is considered to correspond mainly to conjugated bilirubin and delta bilirubin present in blood. Indirect bilirubin is considered to correspond mainly to unconjugated bilirubin present in blood.

従来の直接型ビリルビンの測定方法として、ジアゾ試薬を用いる方法や高速液体クロマトグラフィーを用いる方法、バナジン酸イオンなどの酸化剤を用いる方法が知られている。これらの方法のうち、バナジン酸イオンなどの酸化剤を用いる方法が最も一般的である。この測定方法では、酸化剤によって生体液中のビリルビンを酸化させることにより、ビリルビンが有する450nm付近の吸光度を低下させ、その吸光度の変化からビリルビンを定量する。この測定方法において、直接型ビリルビンのみに酸化剤が作用するように条件を設定することによって、直接型ビリルビンを測定することができる(特許文献2照)。   Known methods for measuring direct bilirubin include a method using a diazo reagent, a method using high performance liquid chromatography, and a method using an oxidizing agent such as vanadate ion. Among these methods, the method using an oxidizing agent such as vanadate ion is the most common. In this measuring method, bilirubin in a biological fluid is oxidized by an oxidizing agent to reduce the absorbance around 450 nm of bilirubin, and bilirubin is quantified from the change in absorbance. In this measurement method, direct bilirubin can be measured by setting conditions so that an oxidizing agent acts only on direct bilirubin (see Patent Document 2).

特許第3727392号公報Japanese Patent No. 3727392 特許第3091094号公報Japanese Patent No. 3091094

従来の直接型ビリルビン測定方法には、直接型ビリルビンに対する反応が完全ではなく、或いは、直接型ビリルビンのみならず一部の間接型ビリルビンにも反応してしまうという問題を有するものがある。そのため、測定されたビリルビンには、抱合型ビリルビンのみではなく、非抱合型ビリルビンやデルタ型ビリルビンも含まれる。一方、酵素法等の抱合型ビリルビンのみを測定する試薬も知られているが、バナジン酸イオンなどの酸化剤を用いる方法と比較すると高価であるという問題がある。したがって、非抱合型ビリルビン及びデルタ型ビリルビンが測定値に含まれず、抱合型ビリルビンのみを簡易かつ安価に測定する試薬が望まれる。   Some of the conventional direct bilirubin measurement methods have a problem that the reaction to the direct bilirubin is not complete, or that it reacts not only to the direct bilirubin but also to some indirect bilirubin. Therefore, the measured bilirubin includes not only conjugated bilirubin but also unconjugated bilirubin and delta bilirubin. On the other hand, a reagent for measuring only conjugated bilirubin such as an enzymatic method is also known, but it has a problem that it is more expensive than a method using an oxidizing agent such as vanadate ion. Therefore, a reagent that does not include unconjugated bilirubin and delta-type bilirubin in the measurement value and measures only the conjugated bilirubin simply and inexpensively is desired.

本発明は、前述された事情に鑑みてなされたものであり、その目的は、生体液中の抱合型ビリルビンを精度よく且つ簡易に測定する手段を提供することにある。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide means for accurately and easily measuring conjugated bilirubin in a biological fluid.

本発明者らは鋭意研究の結果、バナジン酸イオンを酸化剤として生体液中のビリルビンを測定する測定系において、p−トルエンスルホン酸を含有させることにより、抱合型ビリルビンを精度よく測定できることを見出し、本発明を完成するに至った。   As a result of intensive studies, the present inventors have found that conjugated bilirubin can be accurately measured by including p-toluenesulfonic acid in a measurement system for measuring bilirubin in a biological fluid using vanadate ions as an oxidizing agent. The present invention has been completed.

酸化剤として用いるバナジン酸イオンとしては、その種類に特段の制限は無いが、好ましい具体例としては、例えば、VO3−、VO43−などの五価のバナジウムを含むものが挙げられる。試薬中にバナジン酸を添加する場合には、バナジン酸そのものを用いてもよいが、例えば、リチウム、ナトリウム、カリウムなどのアルカリ金属類の塩や、アンモニウム塩などとして用いることが溶解性の観点から好ましい。試薬におけるバナジン酸イオンの濃度は、試料となる生体液中に含まれるビリルビンの濃度範囲に応じて適宜設定されるが、通常は、2〜8mMの範囲である。バナジン酸イオンが生体液中のビリルビンと反応することによりビリルビンが酸化され、ビリルビンが有する450nmの吸光度が低下する。これにより生体液中のビリルビンが光学的に定量可能となる。   The vanadate ion used as the oxidizing agent is not particularly limited in its type, but preferred specific examples include those containing pentavalent vanadium such as VO3- and VO43-. In the case where vanadic acid is added to the reagent, vanadic acid itself may be used. For example, it may be used as a salt of an alkali metal such as lithium, sodium or potassium, or as an ammonium salt. preferable. The concentration of vanadate ions in the reagent is appropriately set according to the concentration range of bilirubin contained in the sample biological fluid, but is usually in the range of 2 to 8 mM. When the vanadate ion reacts with bilirubin in the biological fluid, bilirubin is oxidized, and the absorbance at 450 nm of bilirubin decreases. Thereby, bilirubin in the biological fluid can be optically quantified.

非抱合型ビリルビン及びデルタ型ビリルビンの反応抑制剤として用いるp−トルエンスルホン酸は、その種類に特段の限定は無い。また、p−トルエンスルホン酸に代えて、他の芳香族スルホン酸類が用いられてもよい。他の芳香族スルホン酸類の具体例としては、例えば、ベンゼンスルホン酸、p−エチルベンゼンスルホン酸、p−nプロピルベンゼンスルホン酸、p−イソプロピルベンゼンスルホン酸、2,4−ジメチルベンゼンスルホン酸、2,5−ジメチルベンゼンスルホン酸、オクチルベンゼンスルホン酸、ドデシルベンゼンスルホン酸などが挙げられる。試薬におけるp−トルエンスルホン酸の濃度は、試料となる生体液中に含まれる非抱合型ビリルビン及びデルタ型ビリルビンの濃度範囲に応じて適宜設定されるが、通常は、10〜50mMの範囲である。また、試薬におけるp−トルエンスルホン酸の濃度は、バナジン酸イオンに対して、モル比で2.5〜12.5の範囲が好ましい。   The kind of p-toluenesulfonic acid used as a reaction inhibitor for unconjugated bilirubin and delta-type bilirubin is not particularly limited. Further, instead of p-toluenesulfonic acid, other aromatic sulfonic acids may be used. Specific examples of other aromatic sulfonic acids include, for example, benzenesulfonic acid, p-ethylbenzenesulfonic acid, pnpropylbenzenesulfonic acid, p-isopropylbenzenesulfonic acid, 2,4-dimethylbenzenesulfonic acid, 2, Examples include 5-dimethylbenzenesulfonic acid, octylbenzenesulfonic acid, dodecylbenzenesulfonic acid, and the like. The concentration of p-toluenesulfonic acid in the reagent is appropriately set according to the concentration range of unconjugated bilirubin and delta bilirubin contained in the biological fluid as a sample, but is usually in the range of 10 to 50 mM. . The concentration of p-toluenesulfonic acid in the reagent is preferably in the range of 2.5 to 12.5 in terms of molar ratio with respect to vanadate ions.

また、非抱合型ビリルビン及びデルタ型ビリルビンの反応抑制剤として、さらに、ヒドラジン類、ヒドロキシルアミン類、オキシム類、脂肪族多価アミン類、フェノール類、水溶性高分子、及びHLB値が10以上の非イオン性界面活性剤などが試薬に含まれてもよい。これらの併用については、抱合型ビリルビンの測定に影響を及ぼさない限り特に制限されない。ヒドラジン類の具体例としては、ヒドラジン、フェニルヒドラジン、又はこれらの鉱酸塩(塩酸塩、硫酸塩など)が挙げられる。ヒドロキシルアミン類の具体例としては、ヒドロキシルアミン、フェニルヒドロキシルアミン、又はこれらの鉱酸塩(塩酸塩、硫酸塩など)が挙げられる。オキシム類の具体例としては、アセトキシム、ジアセチルモノオキシム、サリチルアルドキシムなどが挙げられる。脂肪族多価アミン類の具体例としては、テトラエチレンペンタミン、ヘキサメチレンテトラミン、トリエチレンテトラミンなどが挙げられる。フェノール類の具体例としては、フェノール、p−クロルフェノール、p−アセトアミドフェノール、4−クロル−1−ナフトール、β−ナフトールなどが挙げられる。水溶性高分子の具体例としては、ポリビニルアルコール、ポリビニルピロリドンなどが挙げられる。HLB値が10以上の非イオン性界面活性剤の具体例としては、エマルゲン−123p(ポリオキシエチレンラウリルエーテル、花王株式会社商品名)、エマルゲン−950(ポリオキシエチレンノニルフェニルエーテル、花王株式会社商品名)、トリトンX−405(ポリオキシエチレンイソオクチルフェニルエーテル、ロームアンドハース社商品名)、Brij97(ポリオキシエチレン10オレイルエーテル、シグマ社商品名)などが挙げられる。   In addition, as a reaction inhibitor for unconjugated bilirubin and delta bilirubin, hydrazines, hydroxylamines, oximes, aliphatic polyvalent amines, phenols, water-soluble polymers, and HLB values of 10 or more Nonionic surfactants and the like may be included in the reagent. These combinations are not particularly limited as long as they do not affect the measurement of conjugated bilirubin. Specific examples of the hydrazines include hydrazine, phenyl hydrazine, or mineral salts thereof (hydrochloride, sulfate, etc.). Specific examples of hydroxylamines include hydroxylamine, phenylhydroxylamine, or mineral salts thereof (hydrochloride, sulfate, etc.). Specific examples of oximes include acetoxime, diacetyl monooxime, salicylaldoxime and the like. Specific examples of the aliphatic polyvalent amines include tetraethylenepentamine, hexamethylenetetramine, and triethylenetetramine. Specific examples of phenols include phenol, p-chlorophenol, p-acetamidophenol, 4-chloro-1-naphthol, β-naphthol and the like. Specific examples of the water-soluble polymer include polyvinyl alcohol and polyvinyl pyrrolidone. Specific examples of the nonionic surfactant having an HLB value of 10 or more include Emulgen-123p (polyoxyethylene lauryl ether, trade name of Kao Corporation), Emulgen-950 (polyoxyethylene nonylphenyl ether, Kao Corporation product) Name), Triton X-405 (polyoxyethylene isooctyl phenyl ether, trade name of Rohm and Haas), Brij97 (polyoxyethylene 10 oleyl ether, trade name of Sigma) and the like.

これら反応抑制剤は、単独でも非抱合型ビリルビン及びデルタ型ビリルビンの反応抑制作用を有しているが、二種以上組み合わせることにより、反応抑制作用がより高くなる場合もあるので、状況に併せて適宜選択して用いればよい。また、これらの反応抑制剤の使用濃度は、試料となる生体液中に含まれる非抱合型ビリルビン及びデルタ型ビリルビンの反応を抑制し得る濃度範囲で適宜設定される。   These reaction inhibitors alone have an inhibitory action on unconjugated bilirubin and delta-type bilirubin, but the combination of two or more types may increase the reaction inhibitory action. What is necessary is just to select and use suitably. Moreover, the use concentration of these reaction inhibitors is appropriately set within a concentration range capable of suppressing the reaction of unconjugated bilirubin and delta bilirubin contained in the biological fluid as a sample.

また、分析精度の向上、試薬の安定性、ビリルビンの酸化反応の促進などを目的として、さらに、キレート剤が試薬に含まれてもよい。キレート剤の具体例としては、エチレンジアミン四酢酸(EDTA)、ニトリロ三酢酸(NTA)、シクロヘキサンジアミン四酢酸(CyDTA)、ジエチレントリアミン五酢酸(DTPA)ヒドロキシエチルエチレンジアミン三酢酸(EDTA−OH)、トリエチレンテトライミン六酢酸(TTIIA)、ヒドロキシエチルイミノ二酢酸(HIDA)、1−ヒドロキシエタン−1,1−ジホスホン酸、あるいはこれらのアルカリ金属塩(例えば、リチウム塩、ナトリウム塩、カリウム塩など)やアンモニウム塩などが挙げられる。試薬におけるキレート剤の濃度は、抱合型ビリルビンの測定を阻害しない範囲で適宜設定される。   Further, a chelating agent may be further included in the reagent for the purpose of improving analysis accuracy, stability of the reagent, promotion of bilirubin oxidation reaction, and the like. Specific examples of chelating agents include ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), cyclohexanediaminetetraacetic acid (CyDTA), diethylenetriaminepentaacetic acid (DTPA) hydroxyethylethylenediaminetriacetic acid (EDTA-OH), triethylenetetraacetic acid. Imine hexaacetic acid (TTIIA), hydroxyethyliminodiacetic acid (HIDA), 1-hydroxyethane-1,1-diphosphonic acid, or an alkali metal salt thereof (for example, lithium salt, sodium salt, potassium salt, etc.) or ammonium salt Etc. The concentration of the chelating agent in the reagent is appropriately set within a range not inhibiting the measurement of conjugated bilirubin.

また、非抱合型ビリルビン及びデルタ型ビリルビンの反応抑止を目的として、非抱合型ビリルビンが試薬に含まれてもよい。試薬における非抱合型ビリルビンの濃度は、0.1〜10mg/Lの範囲が好適である。さらに、非抱合型ビリルビンの安定化の観点から、ヒト血清アルブミン又は牛血清アルブミンなどが適宜選択されて用いられてもよい。   In addition, unconjugated bilirubin may be included in the reagent for the purpose of inhibiting the reaction of unconjugated bilirubin and delta bilirubin. The concentration of unconjugated bilirubin in the reagent is preferably in the range of 0.1 to 10 mg / L. Furthermore, from the viewpoint of stabilization of unconjugated bilirubin, human serum albumin or bovine serum albumin may be appropriately selected and used.

また、試薬には適宜緩衝液や防腐剤を用いることができる。緩衝液としては、例えば、リン酸緩衝液、クエン酸緩衝液、コハク酸緩衝、酒石酸緩衝液、フタル酸緩衝液などが挙げられる。   In addition, a buffer solution or a preservative can be appropriately used as the reagent. Examples of the buffer include phosphate buffer, citrate buffer, succinate buffer, tartaric acid buffer, phthalate buffer, and the like.

抱合型ビリルビン測定用試薬は、前述された成分を適宜選択して常法により混合することにより得ることができる。好ましい具体例としては、例えば、第1試薬は、pH2.6〜3.0に調整された酒石酸緩衝液10〜100mM、塩化ヒドロキシルアンモニウム10〜50mM、ヒドロキシエタンジホスホン酸5〜20mM、p−トルエンスルホン酸10〜50mM、DTPA0.02〜1mM、ビリルビン溶液0.1〜10mg/mL、非イオン性界面活性剤0.01〜0.1重量%、ヒト血清アルブミン又は牛血清アルブミン(BSA)0.005〜0.05重量%を含み、第2試薬は、pH7.0に調整されたリン酸緩衝液10〜100mM、メタバナジン酸ナトリウム2〜8mM、ヒドロキシエタンジホスホン酸5〜10mM、ヒト血清アルブミン又は牛血清アルブミン(BSA)0.005〜0.05%を含む。なお、抱合型ビリルビン測定用試薬はこのような第1試薬と第2試薬とを混合する二試薬系のものであっても、全ての成分が予め混合された一試薬系のものであってもよい。   The conjugated bilirubin measuring reagent can be obtained by appropriately selecting the above-mentioned components and mixing them by a conventional method. As a preferable specific example, for example, the first reagent is 10 to 100 mM tartrate buffer adjusted to pH 2.6 to 3.0, 10 to 50 mM hydroxylammonium chloride, 5 to 20 mM hydroxyethanediphosphonic acid, p-toluene. Sulfonic acid 10-50 mM, DTPA 0.02-1 mM, bilirubin solution 0.1-10 mg / mL, nonionic surfactant 0.01-0.1 wt%, human serum albumin or bovine serum albumin (BSA) 0. 005 to 0.05% by weight, the second reagent is phosphate buffer 10 to 100 mM adjusted to pH 7.0, sodium metavanadate 2 to 8 mM, hydroxyethanediphosphonic acid 5 to 10 mM, human serum albumin or Contains 0.005 to 0.05% bovine serum albumin (BSA). The conjugated bilirubin measurement reagent may be a two-reagent system in which the first reagent and the second reagent are mixed, or a one-reagent system in which all components are premixed. Good.

前述された二試薬系の試薬を用いて抱合型ビリルビンを測定する方法の具体例は次のようである。第1試薬に生体液(血漿、血清、尿など)を混合し、この溶液の特定波長、例えば430〜460nm付近の吸光度を測定する(吸光度1)。次いで、上記溶液に第2試薬を添加して、25〜40℃で、3〜15分間、ビリルビンの酸化反応を行った後、再度、特定波長の吸光度を測定する(吸光度2)。得られた吸光度1及び吸光度2の値に液量補正値などを乗ずるなどした後、特定波長における吸光度変化量Aを求める。そして、標準物質に試薬を作用させて同様に得られた吸光度変化量Bから作成した検量線に当て嵌めることによって生体液中の抱合型ビリルビンの濃度を測定することができる。   A specific example of a method for measuring conjugated bilirubin using the aforementioned two-reagent reagent is as follows. A biological fluid (plasma, serum, urine, etc.) is mixed with the first reagent, and the absorbance of this solution at a specific wavelength, for example, around 430 to 460 nm is measured (absorbance 1). Subsequently, after adding a 2nd reagent to the said solution and performing the oxidation reaction of bilirubin for 3 to 15 minutes at 25-40 degreeC, the light absorbency of a specific wavelength is measured again (absorbance 2). After multiplying the obtained values of absorbance 1 and absorbance 2 by a liquid amount correction value or the like, an absorbance change amount A at a specific wavelength is obtained. Then, the concentration of conjugated bilirubin in the biological fluid can be measured by applying a reagent to the standard substance and fitting it to a calibration curve created from the absorbance change amount B obtained in the same manner.

以下、実施例が示されて本発明が更に詳細に説明されるが、本発明は以下の実施例に限定されないことは言うまでもない。   EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated in detail, it cannot be overemphasized that this invention is not limited to a following example.

[実施例1〜7]
表1にそれぞれ示される組成の試薬を抱合型ビリルビン測定用試薬として調製した。なお、各第1試薬のpHは2.9に調整した。
[Examples 1-7]
Reagents having the compositions shown in Table 1 were prepared as conjugated bilirubin measuring reagents. The pH of each first reagent was adjusted to 2.9.

[比較例1〜5]
表1にそれぞれ示される組成の試薬を抱合型ビリルビン測定用試薬として調製した。なお、各第1試薬のpHは2.9に調整した。また、バナジン酸を酸化剤として用いた測定法の商品名:直接ビリルビンE−HAテストワコー(和光純薬工業株式会社製)、及び酵素(ビリルビンオキシダーゼ)を用いた測定法の商品名:イアトロLQ D−BIL(A)(ニプロ株式会社製)を比較例4,5として用いた。比較例5の酵素を用いた測定方法は、従来のバナジン酸法(比較例1)に比べて、非抱合型ビリルビン及びデルタ型ビリルビンの影響を受けることなく、抱合型ビリルビンを測定できることが知られている。
[Comparative Examples 1-5]
Reagents having the compositions shown in Table 1 were prepared as conjugated bilirubin measuring reagents. The pH of each first reagent was adjusted to 2.9. Moreover, the brand name of the measuring method using vanadic acid as an oxidant: The brand name of the measuring method using direct bilirubin E-HA test Wako (manufactured by Wako Pure Chemical Industries, Ltd.) and the enzyme (bilirubin oxidase): Iatro LQ D-BIL (A) (manufactured by Nipro Corporation) was used as Comparative Examples 4 and 5. The measurement method using the enzyme of Comparative Example 5 is known to be able to measure conjugated bilirubin without being affected by unconjugated bilirubin and delta bilirubin compared to the conventional vanadic acid method (Comparative Example 1). ing.

Figure 2017173011
Figure 2017173011

QAPトロール×1(シスメックス社製)に、非抱合型ビリルビンとして、干渉チェック・Aプラスのビリルビン−F(シスメックス社製)を0、0.5、1.0mg/dL添加し、それぞれ試料1、2、3を調製した。また、QAPトロール×1(シスメックス社製)に、自社調製したデルタ型ビリルビンを0、0.25、5mg/dL添加し、それぞれ試料4、5、6を調製した。自動分析装置7180(日立ハイテクノロジーズ社製)を用いて、以下に示す測定条件で実施例1〜7及び比較例1〜3を試薬として各試料1〜6を測定した。また、各試薬添付の測定法に準じて、比較例4,5を試薬として各試料1〜6を測定した。その結果を表2に示す。   QAP trawl × 1 (manufactured by Sysmex Corporation) was added 0, 0.5, and 1.0 mg / dL of interference check A plus bilirubin-F (manufactured by Sysmex Corporation) as unconjugated bilirubin. 2, 3 were prepared. Moreover, 0, 0.25, 5 mg / dL of delta type bilirubin prepared in-house was added to QAP trawl × 1 (manufactured by Sysmex Corporation) to prepare Samples 4, 5, and 6, respectively. Using an automatic analyzer 7180 (manufactured by Hitachi High-Technologies Corporation), Samples 1 to 6 were measured using Examples 1 to 7 and Comparative Examples 1 to 3 as reagents under the measurement conditions shown below. Moreover, according to the measuring method attached to each reagent, each sample 1-6 was measured by using Comparative Examples 4 and 5 as a reagent. The results are shown in Table 2.

測定条件:ビリルビン10mg/dL相当のジタウロビリルビンを含む水溶液を標準液として使用し、表3に示す条件で測定を行った。   Measurement conditions: An aqueous solution containing ditaurobilirubin equivalent to 10 mg / dL of bilirubin was used as a standard solution, and measurement was performed under the conditions shown in Table 3.

Figure 2017173011
Figure 2017173011

Figure 2017173011
Figure 2017173011

表2から明らかなように、実施例1〜7では、試料1と試料3との測定値差、及び試料4と試料6との測定値差が、比較例5と同程度あり、比較例1〜4より低かった。これにより、実施例1〜7の測定試薬は、非抱合型ビリルビン及びデルタ型ビリルビンが測定値に与える影響が、酵素法である比較例5と同程度に低く、また、バナジン酸イオンを酸化剤として含む比較例1〜4より明らかに低いことが確認できた。   As is clear from Table 2, in Examples 1 to 7, the measured value difference between Sample 1 and Sample 3 and the measured value difference between Sample 4 and Sample 6 are comparable to Comparative Example 5, and Comparative Example 1 It was lower than ~ 4. As a result, the measurement reagents of Examples 1 to 7 have the effects that the unconjugated bilirubin and delta bilirubin have on the measurement values are as low as those of Comparative Example 5 which is an enzymatic method, and vanadate ions are oxidized to the oxidizing agent. It was confirmed that it was clearly lower than Comparative Examples 1-4.

Claims (7)

p−トルエンスルホン酸を含み、バナジン酸イオンを酸化剤として含む抱合型ビリルビン測定用試薬。   A conjugated bilirubin measuring reagent containing p-toluenesulfonic acid and containing vanadate ion as an oxidizing agent. バナジン酸イオンに対してp−トルエンスルホン酸をモル比で2.5〜12.5含む請求項1に記載の抱合型ビリルビン測定用試薬。   The reagent for measuring a conjugated bilirubin according to claim 1, comprising 2.5 to 12.5 of molar ratio of p-toluenesulfonic acid to vanadate ion. さらに非抱合型ビリルビンを含む請求項1又は2に記載の抱合型ビリルビン測定用試薬。   The reagent for measuring conjugated bilirubin according to claim 1 or 2, further comprising unconjugated bilirubin. さらに非イオン性界面活性剤を含む請求項1から3のいずれかに記載の抱合型ビリルビン測定用試薬。   The reagent for measuring a conjugated bilirubin according to any one of claims 1 to 3, further comprising a nonionic surfactant. 第1試薬にp−トルエンスルホン酸を含み、
第2試薬にバナジン酸イオンを酸化剤として含む請求項1又は2に記載の抱合型ビリルビン測定用試薬。
P-toluenesulfonic acid is included in the first reagent,
The conjugated bilirubin measurement reagent according to claim 1 or 2, wherein the second reagent contains vanadate ions as an oxidizing agent.
上記第1試薬に、さらに非抱合型ビリルビンを含む請求項5に記載の抱合型ビリルビン測定用試薬。   The reagent for measuring conjugated bilirubin according to claim 5, further comprising unconjugated bilirubin in the first reagent. 上記第1試薬に、さらに非イオン性界面活性剤を含む請求項5又は6に記載の抱合型ビリルビン測定用試薬。



The reagent for measuring a conjugated bilirubin according to claim 5 or 6, further comprising a nonionic surfactant in the first reagent.



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JPH07231795A (en) * 1993-12-28 1995-09-05 Unitika Ltd Reagent for measuring direct type bilirubin
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JPS5544992A (en) * 1978-09-22 1980-03-29 Miles Lab Apparatus for and method of detecting bilirubin in serum and method of producing same apparatus
JPH07231795A (en) * 1993-12-28 1995-09-05 Unitika Ltd Reagent for measuring direct type bilirubin
JPH09149794A (en) * 1995-11-29 1997-06-10 Unitika Ltd Reagent for measuring conjugated bilirubin
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KR20110002748A (en) * 2009-07-02 2011-01-10 한국생명공학연구원 Ugt1a6 gene snp markers associated with serum bilirubin concentration and uses thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109813918A (en) * 2019-01-11 2019-05-28 河北省医疗器械与药品包装材料检验研究院(河北省医疗器械技术审评中心) A kind of total bilirubin determination reagent kit
CN109813918B (en) * 2019-01-11 2021-04-09 河北省药品医疗器械检验研究院 Total bilirubin determination kit

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