JP6300352B2 - 中性脂肪濃度測定用の標準物質組成物およびその製造方法 - Google Patents
中性脂肪濃度測定用の標準物質組成物およびその製造方法 Download PDFInfo
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- 229920000642 polymer Polymers 0.000 description 1
- 239000001818 polyoxyethylene sorbitan monostearate Substances 0.000 description 1
- 235000010989 polyoxyethylene sorbitan monostearate Nutrition 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- JVUYWILPYBCNNG-UHFFFAOYSA-N potassium;oxido(oxo)borane Chemical compound [K+].[O-]B=O JVUYWILPYBCNNG-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- UMLDUMMLRZFROX-UHFFFAOYSA-N pyridin-2-ylboronic acid Chemical compound OB(O)C1=CC=CC=N1 UMLDUMMLRZFROX-UHFFFAOYSA-N 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- DWHCQRBWSBKHMI-UHFFFAOYSA-N quinolin-2-ylboronic acid Chemical compound C1=CC=CC2=NC(B(O)O)=CC=C21 DWHCQRBWSBKHMI-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013558 reference substance Substances 0.000 description 1
- 235000021067 refined food Nutrition 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- HEBKCHPVOIAQTA-ZXFHETKHSA-N ribitol Chemical compound OC[C@H](O)[C@H](O)[C@H](O)CO HEBKCHPVOIAQTA-ZXFHETKHSA-N 0.000 description 1
- 108010020957 ribitol 2-dehydrogenase Proteins 0.000 description 1
- 150000003303 ruthenium Chemical class 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007391 self-medication Methods 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- LGXHAKXISCHJPE-UHFFFAOYSA-N silver;oxido(oxo)borane Chemical compound [Ag+].[O-]B=O LGXHAKXISCHJPE-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NRHMKIHPTBHXPF-TUJRSCDTSA-M sodium cholate Chemical compound [Na+].C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC([O-])=O)C)[C@@]2(C)[C@@H](O)C1 NRHMKIHPTBHXPF-TUJRSCDTSA-M 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- FHHPUSMSKHSNKW-SMOYURAASA-M sodium deoxycholate Chemical compound [Na+].C([C@H]1CC2)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC([O-])=O)C)[C@@]2(C)[C@@H](O)C1 FHHPUSMSKHSNKW-SMOYURAASA-M 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 1
- ZNJHFNUEQDVFCJ-UHFFFAOYSA-M sodium;2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid;hydroxide Chemical compound [OH-].[Na+].OCCN1CCN(CCS(O)(=O)=O)CC1 ZNJHFNUEQDVFCJ-UHFFFAOYSA-M 0.000 description 1
- ZEDAGFBWUVYFQU-UHFFFAOYSA-M sodium;3-morpholin-4-ylpropane-1-sulfonate;hydrate Chemical compound [OH-].[Na+].OS(=O)(=O)CCCN1CCOCC1 ZEDAGFBWUVYFQU-UHFFFAOYSA-M 0.000 description 1
- 229940083466 soybean lecithin Drugs 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- DPUZPWAFXJXHBN-UHFFFAOYSA-N tetrasodium dioxidoboranyloxy(dioxido)borane Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]B([O-])OB([O-])[O-] DPUZPWAFXJXHBN-UHFFFAOYSA-N 0.000 description 1
- ARYHTUPFQTUBBG-UHFFFAOYSA-N thiophen-2-ylboronic acid Chemical compound OB(O)C1=CC=CS1 ARYHTUPFQTUBBG-UHFFFAOYSA-N 0.000 description 1
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical compound [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
- UKUWOJWHPCYQDY-UHFFFAOYSA-N trimagnesium boric acid diborate Chemical compound [Mg+2].[Mg+2].[Mg+2].OB(O)O.OB(O)O.[O-]B([O-])[O-].[O-]B([O-])[O-] UKUWOJWHPCYQDY-UHFFFAOYSA-N 0.000 description 1
- AISMNBXOJRHCIA-UHFFFAOYSA-N trimethylazanium;bromide Chemical compound Br.CN(C)C AISMNBXOJRHCIA-UHFFFAOYSA-N 0.000 description 1
- 229940113164 trimyristin Drugs 0.000 description 1
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- DCXPBOFGQPCWJY-UHFFFAOYSA-N trisodium;iron(3+);hexacyanide Chemical compound [Na+].[Na+].[Na+].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCXPBOFGQPCWJY-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
- PZRXQXJGIQEYOG-UHFFFAOYSA-N zinc;oxido(oxo)borane Chemical compound [Zn+2].[O-]B=O.[O-]B=O PZRXQXJGIQEYOG-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analysing Biological Materials (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Description
本発明の標準物質組成物は、タンパク質を含む。
本発明の標準物質組成物は、中性脂肪を含む。
本発明の標準物質組成物は、固定化剤で固定化された全血の固定化血球成分を含む。
本発明の標準物質組成物は、溶媒を含む。
工程(1)において、まずタンパク質溶液を準備する。タンパク質溶液の調製方法は特に制限されず、溶液(溶媒)にタンパク質を添加し、タンパク質が溶解するよう混合すればよい。溶媒としては、上述した溶媒が好適に用いられる。
上記のように、全血から、固定化剤で固定化された固定化血球成分を得る工程としては、(i)全血を洗浄して血清・血漿成分を除去し、血球成分を得、固定化剤で固定化し、その後固定化剤を洗浄して、固定化血球成分を得る方法や;(ii)全血と、固定化剤とを混合し、全血と、固定化剤との混合液を得、前記混合液を洗浄して血清・血漿成分および固定化剤を除去し、固定化血球成分を得る方法などが好適である。
工程(3)は、所望の中性脂肪濃度の中性脂肪分散液と、洗浄した固定化血球成分とを混合すればよく、振とう、超音波処理、スターラーによる撹拌など従来公知の混合方法で混合することができる。
本発明における好ましい実施形態においては、第一の反応層8は、酸化還元酵素を含む。酸化還元酵素としては、好ましくは、補欠分子族(「補酵素」とも称する)としてピロロキノリンキノン(PQQ)、フラビンアデニンジヌクレオチド(FAD)、またはフラビンモノヌクレオチド(FMN)を含む。特に、補欠分子族としてピロロキノリンキノン(PQQ)を含むポリオール脱水素酵素が好ましい。なお、本発明においては、本発明の酸化還元酵素を単独で、または混合物の形態として使用してもよい。
また、本発明における第二の反応層9は、脂質を構成するエステル結合を加水分解する脂質分解酵素を含む。ゆえに、本発明のバイオセンサは、中性脂肪センサとして使用することができる。かような脂質分解酵素として、特に制限されないが、具体的には、リポプロテインリパーゼ(LPL)、リパーゼ、エステラーゼが好適に挙げられる。特に、反応性の観点で、リポプロテインリパーゼ(LPL)が好ましい。
本発明に係るバイオセンサは、電子伝達体を含むことが好ましい。ここで、電子伝達体は、第一の反応層8または第二の反応層9に含まれてもよい。好ましくは、第二の反応層9に含まれる。なお、電子伝達体は、界面活性剤層12に含まれていてもよい。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、界面活性剤を有する。好ましい形態においては、電極表面へのタンパク質の固着を防止するとの観点から、第一の反応層8に、界面活性剤を有する。また、好ましい形態においては、本発明のバイオセンサにおいては、第一の反応層8および第二の反応層9と離間されて、界面活性剤が含まれる界面活性剤層12がカバー7側に形成される。カバー7側に界面活性剤層が形成されていると、カバー7が直接試料に触れる場合よりも、カバー側への全血等の試料の広がりや濡れ性がよくなり、試料を試料供給部に素早く導入できるため好ましい。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、親水性高分子を有する。この際、電極表面上に均一に固定化するとの観点から、第一の反応層8に含ませることが好ましい。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、糖を有する。糖は測定に関わる酵素反応に関与せず、また、自身が反応することもないものを適宜選択して使用することができ、各層の固定化や安定化に寄与し得る。糖は、第一の反応層8または第二の反応層9のいずれに含まれてもよいが、両方の層に含まれることが好ましい。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、血液抗凝固剤を有する。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、ホウ酸またはその誘導体を有する(ただし、かかる「ホウ酸またはその誘導体」の概念からは、後述する「トリスホウ酸」は除く)。これにより、測定値に対する血液中のグルコースの影響をほとんど無くすかまたはまったく無くすことができ、どのような血糖値であっても、所定の測定値が得られ、測定値のばらつきがほとんど生じない。
本発明に係る好ましい実施形態のバイオセンサにおいて、第一の反応層8、第二の反応層9および界面活性剤層12の少なくとも一層は、トリスホウ酸を含む。
(使い捨て型バイオセンサの作製)
本発明の標準物質組成物が用いられるバイオセンサの一例として、下記方法により使い捨て型バイオセンサを作製した。なお、当該使い捨て型バイオセンサを図3に示す。
第一の反応層8(GLDH層)は以下の手順で形成した。
PQQ依存性グリセロール脱水素酵素を0.375U;
エマルゲンPP−290(花王株式会社)を0.05質量%(0.25μg);
トリスホウ酸(トリス(ヒドロキシメチル)アミノメタンおよびホウ酸水溶液を等モル濃度で混合し、pH7.5に調整)を10mM(0.37μg);
トレハロース二水和物(和光純薬工業株式会社製)を10.5質量%(52.5μg);
ポリビニルアルコール500(和光純薬工業株式会社製)を0.5質量%(2.5μg);
ヘパリンナトリウム(和光純薬工業株式会社製)を0.1U;
になるように混合し、溶液を得た。得られたGLDH溶液を滴下し、40℃で5分間乾燥させ、第一の反応層(GLDH層)を得た。
第二の反応層9(LPL層)は以下の手順で形成した。
リポプロテインリパーゼ(LPL、旭化成株式会社製)を90U;
ヘキサアンミンルテニウム(III)塩化物(和光純薬工業株式会社製)を200mM(62μg);
トリスホウ酸を10mM(0.37μg);
トレハロース二水和物(和光純薬工業株式会社製)を3.0質量%(15.0μg);
四ホウ酸カリウム(和光純薬工業株式会社製)を80mM(12μg);
ヘパリンナトリウム(和光純薬工業株式会社製)を0.1U;
になるように混合し、溶液を得た。得られたLPL溶液を、形成させたGLDH層の上に重層(被覆)するように滴下し、50℃で5分間乾燥させ、第二の反応層9(LPL層)を得た。このようにして、第一の反応層8であるGLDH層、さらにその上に第二の反応層9であるLPL層を形成(重層)した。
界面活性剤層12は以下の手順で形成した。
エマルゲンPP−290(花王株式会社製)を0.1質量%(0.5μg)、
ヘパリンナトリウム(和光純薬工業株式会社)を0.08U;
になるように混合し、界面活性剤溶液を得た。得られた界面活性剤溶液を、PETからなるカバーに接着剤を貼り合わした隙間に滴下後、50℃で5分間乾燥させ、界面活性剤層を形成した。
界面活性剤層が形成されているカバーに接着した接着剤(両面テープ)と、第一の反応層と第二の反応層とが形成されている電極基板とを互いに貼り合わせることにより、使い捨て型バイオセンサを作成した。
[標準物質組成物の作製]
(トリオレインエマルションの調製)
BSA(ウシ血清アルブミン、和光純薬工業株式会社製)を12質量%(12g)になるように蒸留水100mLに溶解し、BSA溶液を得た(タンパク質溶液)。その後、中性脂肪としてトリオレイン(ナカライテスク社)をBSA溶液1dLあたり2000mgとなるように混合した。得られた溶液を超音波破砕機(日本エマソン株式会社、SONIFIER 450A、20kHz)で氷冷しながら10分間処理し、トリオレインエマルション(中性脂肪分散液)を得た。トリオレインエマルションを調製する際の温度は10℃であった。また超音波処理以外の調製する際の温度は25℃であった。
下記成分を任意の順番で混合することによって疑似血清溶液を得た。この際の混合時間は5分で、疑似血清溶液の温度は25℃である。
(1)ヒト血液3mLと、27mLの4%パラホルムアルデヒド・リン酸緩衝液(和光純薬工業社製)とを混合液(全血と、固定化剤との混合液)を作製し、この混合液を室温(25℃)で24時間放置した。
上記で準備した固定化血球成分(全血3mLより調製した固定化血球成分)1.5mLと、疑似血清溶液(1.86mL)とを振とうして混合することで、固定化血球成分の体積が42%(46.2質量%)である標準物質組成物を得た。
[中性脂肪センサを用いた全血との比較試験]
HZ−5000(北斗電工株式会社製)に使い捨て型バイオセンサを接続し、上記で調製した標準物質組成物を点着した。点着45秒後に参照極を基準として対極に対して作用極に+200mVの電位を印加して、得られた電流値を読み取った。
試料として固定化処理を行わなかった全血成分を用いて標準物質組成物を調製し、それを使用した以外は、実施例1と同様に行った。なお、比較例1の標準物質組成物における遠心して得られた上清の中性脂肪濃度も、それぞれ、(1)0mg/dL、(2)250mg/dL、(3)500mg/dLであり、それぞれ2回ずつ測定を行った。結果を表3および図4に示す。
固定化した血球成分を用いて調製した標準物質組成物(遠心して得られた上清の中性脂肪濃度が、それぞれ、(1)0mg/dL、(2)250mg/dL、(3)500mg/dL)を試料とし、1.5mLエッペンチューブに分注して、作製直後の電流値および50℃で3日間および9日間保存した後の電流値を測定した(それぞれ2回ずつ測定)。結果を表4および図5に示す。
未処理の血球成分を用いて調製した標準物質組成物(遠心して得られた上清の中性脂肪濃度が、それぞれ、(1)0mg/dL、(2)250mg/dL、(3)500mg/dL)を試料とし、1.5mLエッペンチューブに分注して、作製直後の電流値および50℃で3日間および9日間保存した後の電流値を測定した(それぞれ2回ずつ測定)。結果を表5および図5に示す。
2 作用極、
2−1 作用極作用部分、
3 参照極、
3−1 参照極作用部分、
4 対極、
4−1 対極作用部分、
5 絶縁層、
6 接着剤、
7 カバー、
8 第一の反応層、
9 第二の反応層、
12 界面活性剤層、
S 空間部。
Claims (6)
- 中性脂肪と、
タンパク質と、
全血の血球成分が固定剤によって固定化されてなる固定化血球成分と、
溶媒と、
を含む、中性脂肪濃度測定用の標準物質組成物。 - 前記固定剤が、パラホルムアルデヒドである、請求項1に記載の標準物質組成物。
- 前記タンパク質が、0.016〜24質量%、
前記中性脂肪が、0を超えて1600mg/dL以下、
前記固定化血球成分が、20〜60質量%、
で含まれる、請求項1または2に記載の標準物質組成物。 - 前記中性脂肪が、モノグリセリド、ジグリセリド、およびトリグリセリドからなる群より選択される少なくとも1つである、請求項1〜3のいずれか1項に記載の標準物質組成物。
- 前記タンパク質が、卵アルブミン、血清アルブミン、および乳アルブミンからなる群より選択される少なくとも1つである、請求項1〜4のいずれか1項に記載の標準物質組成物。
- (1)中性脂肪をタンパク質溶液中に分散させて中性脂肪分散液を調製する工程と、
(2)全血から、固定化剤で固定化された固定化血球成分を得る工程と、
(3)前記中性脂肪分散液と、前記固定化血球成分とを混合する工程と、
を有する、中性脂肪濃度測定用の標準物質組成物の製造方法。
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