JP6971535B2 - 純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 - Google Patents
純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 Download PDFInfo
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- C07D277/62—Benzothiazoles
- C07D277/64—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2
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Description
チオフラビンT(ThT)は、下記式で表され、4−(3,6−ジメチル−1,3−ベンゾチアゾール−3−イウム−2−イル)−N,N−ジメチルアニリンクロリドとも称される公知の化合物である。
本実施形態に係るチオフラビンTの精製方法は、粗チオフラビンTが極性溶媒に溶解したチオフラビンT溶液を用意するステップと、チオフラビンT溶液を無極性溶媒で液液抽出するステップと、を備える。また、チオフラビンT溶液の440nm付近にピーク波長を有する蛍光の発光強度を測定し、測定された発光強度がバックグラウンドレベルに達したか否かを判定するステップを更に備えていてもよい。本実施形態に係る精製方法により、純粋なThTを得ることができる。
本実施形態に係るチオフラビンTの製造方法は、上述したチオフラビンTの精製方法を実施する精製工程を備える。本実施形態に係る製造方法により、純粋なThTを得ることができる。
本実施形態に係るチオフラビンTを含有する組成物は、440nm付近にピーク波長を有する蛍光の発光強度がバックグラウンドレベルである組成物である。すなわち、蛍光性不純物を実質的に含まない組成物、又は実質的にThTからなる組成物(分子集合体)である。一実施形態に係る組成物は、チオフラビンTを含有し、波長350nmの光を照射したときの波長440nmの蛍光の発光強度がバックグラウンドレベルである組成物である。
アミロイドとは、βシート構造が特徴的なタンパク質の特殊な凝集状態を示す。アミロイドには、元になるタンパク質の違いにより、様々な種類が存在する。すなわち、インスリンの場合はインスリンアミロイドと呼ばれ、β2ミクログロブリンの場合はβ2ミクログロブリンアミロイドと呼ばれ、アミロイドβタンパク質の場合はβアミロイドと呼ばれる。体内でのアミロイドの蓄積は病気の原因にもなる。例えば、β2ミクログロブリンアミロイドは、透析アミロイド―シス、βアミロイドはアルツハイマー病である。
Claims (5)
- 粗チオフラビンTが極性溶媒に溶解したチオフラビンT溶液を用意するステップと、
チオフラビンT溶液中の蛍光性不純物を無極性溶媒で液液抽出するステップと、を備える、純粋なチオフラビンTを得る方法。 - 液液抽出するステップが、波長475nm以下の光を遮光した状態で行われる、請求項1に記載の方法。
- 前記極性溶媒が、水系溶媒、メタノール、エタノール、アセトニトリル及びジメチルスルホキシド、並びにこれらの2種以上を混合した混合溶媒からなる群から選択される、請求項1又は2に記載の方法。
- 前記無極性溶媒が、ヘキサン、ヘプタン、オクタン、シクロヘキサン、トルエン及びキシレン、並びにこれらの2種以上を混合した混合溶媒からなる群から選択される、請求項1〜3のいずれか一項に記載の方法。
- 請求項1〜4のいずれか一項に記載の方法を実施する精製工程を備える、純粋なチオフラビンTの製造方法。
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JP2015191309A JP6971535B2 (ja) | 2015-09-29 | 2015-09-29 | 純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 |
US15/762,166 US11401248B2 (en) | 2015-09-29 | 2016-09-27 | Liquid-liquid extraction methods for purifying and producing pure thioflavin T by monitoring light emission intensity of thioflavin T |
PCT/JP2016/078416 WO2017057344A1 (ja) | 2015-09-29 | 2016-09-27 | 純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 |
DE112016004434.8T DE112016004434T5 (de) | 2015-09-29 | 2016-09-27 | Verfahren zum raffinieren von reinem thioflavin t, verfahren zum herstellen von reinem thioflavin t, zusammensetzung, die thioflavin t enthält, und verfahren zum nachweisen von amyloid |
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WO2017056758A1 (ja) | 2015-09-29 | 2017-04-06 | 浜松ホトニクス株式会社 | 純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 |
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US412978A (en) * | 1889-10-15 | Signor to leopold cassella | ||
US2037448A (en) * | 1935-04-05 | 1936-04-14 | Du Pont | Manufacture of thioflavine t |
US20030187011A1 (en) * | 2001-12-20 | 2003-10-02 | Lashuel Hilal A. | Apomorphine inhibitors of amyloid-beta (Abeta) fibril formation and their use in amyloidosis based disease |
US7763186B2 (en) * | 2002-06-21 | 2010-07-27 | Los Alamos National Security, Llc | Preparation and purification of ionic liquids and precursors |
WO2017056758A1 (ja) | 2015-09-29 | 2017-04-06 | 浜松ホトニクス株式会社 | 純粋なチオフラビンtを精製する方法、純粋なチオフラビンtの製造方法、チオフラビンtを含有する組成物、及びアミロイドの検出方法 |
US11402328B2 (en) * | 2015-09-29 | 2022-08-02 | Hamamatsu Photonics K.K. | Amyloid β oligomer detection method, amyloid β oligomer detection device, and amyloid β oligomer detection program |
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DE112016004434T5 (de) | 2018-06-28 |
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JP2017066066A (ja) | 2017-04-06 |
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