JP2020514731A - 生体試料の抗酸化能を決定する方法および関連キット - Google Patents
生体試料の抗酸化能を決定する方法および関連キット Download PDFInfo
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- JP2020514731A JP2020514731A JP2019543221A JP2019543221A JP2020514731A JP 2020514731 A JP2020514731 A JP 2020514731A JP 2019543221 A JP2019543221 A JP 2019543221A JP 2019543221 A JP2019543221 A JP 2019543221A JP 2020514731 A JP2020514731 A JP 2020514731A
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- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
- G01N33/585—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances with a particulate label, e.g. coloured latex
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Abstract
Description
・試料を直接測定、精製ステップなし;
・シンプルで低コストである;
・明確な物理化学的操作メカニズムを持っている;
・特定の機器を必要としない;
・再現性と信頼性がある;
・周囲条件で安定している;
・親油性と親水性の両方の抗酸化剤を測定する;
・多数の試料に関する研究に使用可能。
・総ラジカル捕捉抗酸化パラメーター(TRAP);
・酸素ラジカル吸収能;
・誘発されたLDL酸化の阻害;
・総オキシラジカル捕捉能アッセイ(TOSCA)。
・トロロックス等価抗酸化能(TEAC)アッセイ;
・鉄イオン還元抗酸化能(FRAP)アッセイ;
・銅イオン還元抗酸化能(CUPRAC);
・酸化剤としてCu錯体を用いる総抗酸化能アッセイ;
・2,2-ジフェニル-1-ピクリルヒドラジルラジカル(DPPH)捕捉;
・2,2-アジノビス3-エチルベンズチアゾリン-6-スルホン酸ラジカル(ABTS)捕捉アッセイ;
・N,N-ジメチル-p-フェニレンジアミンラジカル(DMPD)捕捉アッセイ。
・一般的に0.01〜1M、好ましくは0.05〜0.3Mの酢酸緩衝液400マイクロリットルを試験管に加えた;pHは1〜7、好ましくは3〜5.5の間で変化することができる;
・200マイクロリットルのTMB(3,3',5,5'-テトラメチルベンジジン)溶液を0〜1M、好ましくは0.002〜0.05Mの濃度で添加した;
・白金ナノ粒子を含む100マイクロリットルの溶液を、0.01〜1000ppm、好ましくは0.1〜10ppmの白金濃度で加えた;ナノ粒子の直径は0.1nm〜1000nm、好ましくは1〜100nmの範囲で変化することができる;
・1:2〜1:500の間、好ましくは1:2〜1:100の間の倍数で水溶液により事前に希釈された、100マイクロリットルの試験される試料を加えた;試料が油の形態であるならば、最初にメタノールとイソプロパノールの溶液と混合する;
・発色反応(青)は、200マイクロリットルの1M過酸化水素溶液の添加により開始された。
Claims (14)
- 試料を(i)金属ナノ粒子(ここで、金属は、任意に、金、パラジウムおよび/または銀と組み合わせた白金である)の水溶液、(ii)酸化剤、および(iii)発色性ペルオキシダーゼ基質と接触させ、それによって得られた最終溶液の色の強度を検出するステップを含む、体液または食品の試料の抗酸化能を決定する方法であって、色の強度が、生体試料の抗酸化能に比例する方法。
- 発色性ペルオキシダーゼ基質が、3,3',5,5'-テトラメチルベンジジン(TMB)である、請求項1に記載の方法。
- 酸化剤が、過酸化水素である、請求項1または2に記載の方法。
- ナノ粒子が、0.1nm〜1000nm、好ましくは1〜100nmの範囲で変化する直径を有する、請求項1〜3のいずれか1つに記載の方法。
- 最終溶液が、1〜7、好ましくは3〜5.5のペプチドを有する、好ましくは酢酸緩衝液である緩衝液中で調製される、請求項1〜4のいずれか1つに記載の方法。
- 最終溶液の色の強度が、肉眼で検出される、請求項1〜5のいずれか1つに記載の方法。
- 最終溶液の色の強度が、UV可視分光法によって検出される、請求項1〜5のいずれか1つに記載の方法。
- 最終溶液の色の強度が、約60〜700nm、好ましくは約650nm、より好ましくは652nmの波長で吸光度を測定することによって検出される、請求項7に記載の方法。
- 体液が、唾液である、請求項1〜8のいずれか1つに記載の方法。
- 食品が、果汁または油である、請求項1〜8のいずれか1つに記載の方法。
- 発色性ペルオキシダーゼ基質および金属ナノ粒子(ここで、金属は、任意に、金、パラジウムおよび/または銀と組み合わせた白金である)の水溶液を含み、および任意に、酸化剤および/または緩衝液をさらに含む、体液または食品の試料の抗酸化能を決定するためのキットであって、
該発色性基質、ナノ粒子、任意の酸化剤および任意の緩衝液が、請求項1〜10のいずれか1つに記載されている、キット。 - ・0.01〜1000ppm、好ましくは0.1〜10ppmの濃度での、所定量の金属ナノ粒子(ここで、金属は、任意に、金、パラジウムおよび/または銀と組み合わせた白金である)の水溶液;および
・0.001〜1M、好ましくは0.002〜0.05Mの濃度での、所定量の3,3',5,5'-テトラメチルベンジジン(TMB)の溶液;および任意に
・0.1M〜10Mの濃度での、所定量の過酸化水素;および/または
・1〜7、好ましくは3〜5.5のpH値を有する、0.01Mおよび1M、好ましくは0.05M〜0.3Mの濃度での、所定量の酢酸緩衝液;
を含む、請求項11に記載のキット。 - 請求項1〜9のいずれか1つに記載の方法によって、対象からの体液試料の抗酸化能を決定することを含む、対象における酸化ストレスを評価するためのインビトロ診断方法であって、
参照試料または値と比較した、対象からの体液試料の抗酸化能の減少が、対象の酸化ストレスを示す、方法。 - 対象が、アルコール乱用または不健康な食事などの健康を害するライフスタイルを行っている疑いがあるか、または行っている、あるいは、対象が、腎障害、痛風、子宮内膜症、糖尿病または癌などの疾患に罹患している、または罹患している疑いがある、請求項13に記載の、対象における酸化ストレスを評価するためのインビトロ診断方法。
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