JP2008520681A - 細胞におけるグルタチオンの送達およびatpレベルを増強することによって低酸素症を処置するためのリボース−システインの使用 - Google Patents
細胞におけるグルタチオンの送達およびatpレベルを増強することによって低酸素症を処置するためのリボース−システインの使用 Download PDFInfo
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Abstract
Description
有害なフリーラジカルを発生させる外因性ストレッサーおよび内因性ストレッサーに対する哺乳動物細胞の保護機構は、抗酸化補酵素のグルタチオン(GSH)を利用する。GSHは、細胞および細胞小器官の膜の構造的完全性を維持すること、ならびに微小管および高分子の合成において重要である。非特許文献1を参照のこと。ラット腎上皮細胞および胃細胞におけるGSH合成の刺激は、それぞれ、細胞をシクロホスファミドおよびセロトニンの毒性効果から保護することが見出されている。逆に、グルタチオン合成およびグルタチオン枯渇の阻害は、以下の効果を有することが見出されている:(a)細胞生存度の減少、(b)効果および照射に対する細胞の感受性の増加、(c)過酸化物細胞溶解に対する腫瘍細胞の感受性の増加、(d)プロスタグランジンEおよびロイコトリエンCの合成の減少、ならびに(e)マウスにおけるトリパノソーマ類の選択的破壊。
本発明は、低酸素状態(低酸素症)に脅かされているか、または低酸素状態(低酸素症)に苦しむ哺乳動物を処置するための方法を提供し、この方法は、その哺乳動物の組織における低酸素症に対抗するのに有効な、式Ia:
本明細書で使用される場合、用語RibCysとは、2(R,S)−D−リボ−(1’,2’,3’,4’−テトラヒドロキシブチル)チアゾリジン−4(R)−カルボン酸、ならびに(Ia)の2Rまたは2S鏡像異性体、およびその薬学的に受容可能な塩をいう。そのような塩としては、カルボン酸部分のアルカリ金属塩、およびNH部分の安定な酸付加塩(無機酸および有機酸の両方の塩(例えば、クエン酸塩、リンゴ酸塩、グルコン酸塩、グルタミン酸塩、塩酸塩、硫酸塩など)を含む)が挙げられる。
2(R,S)−D−リボ−1’,2’,3’,4’,−テトラヒドロキシブチルチアゾリジン−4(R)−カルボン酸(RibCys)
この化合物を、R.Bognarら、Z.Liebigs Ann.Chem.,738,68(1970)(この開示は参考として本明細書に援用される)によって記載されるように、リボース(Rib)を用いて合成した。生成物を回収して、4.71g(92.2%収率)の淡黄色物質を得た(mp 149℃〜151℃、dec.[α]D 25 −103.1°(c=0.52、H2O);IR(KBr)ν3220(br、OH、COO−)、1610cm−1(COO−))。
L−システインプロドラッグおよびブチオニンスルホキシイミン(BSO)による阻害による単離されたラット肝細胞におけるグルタチオン生合成の刺激
ラット肝細胞を、P.O.Seglen,Exper.Cell Res.,74,450(1972)にしたがって単離した。最後のプレーティングの後、肝細胞を使用する前に培養物中で維持した。初代培養物のみを、研究の全体にわたって使用した。肝細胞をシステインプロドラッグのNACおよび(Ia)とともに4時間インキュベートし、吸引によって培地を除去した後、細胞を冷リン酸緩衝化生理食塩水でリンスし、5% スルホサリチル酸でタンパク質を除去した。総GSH含量(GSH+GSSG)を、F.Tietze,Anal.Biochem.,27,502(1969)のDTNB[5,5’−ジチオビス(2−ニトロ安息香酸)]グルタチオンレダクターゼ再利用法の改変形によって決定した。サンプル中のGSH濃度を、そのサンプルの循環率を決定すること(412nm/分でのΔOD)によって定量した。BSOによる阻害研究のために、細胞をL−システインプロドラッグでの処理前にBSO(0.20mM)に予め曝露した。
RibCysは心臓および筋肉組織においてGSHを上昇させる
J.C.Robertsら、Toxicol.Lett.,59,245(1991)によって報告されたように、RibCysは、腫瘍を有するCDF1マウスの多くの器官においてグルタチオン(GSH)レベルを首尾よく上昇させた。GSH含量を、RibCys投与(8mmol/kg、i.p.)の1時間後、2時間後、4時間後、8時間後および16時間後にアッセイした;種々の器官は様々な時点で最大GSH含量を達成した。肝臓中のGSHは、16時間の時点で無処理のコントロールと比べて1.5倍上昇した。腎臓GSHもまた、16時間で最大であり、コントロール値の1.6倍を達成した。筋肉中のGSHは、コントロール動物の2.5倍のレベルを達成し、一方で膀胱は、2.1倍上昇し、心臓は1.8倍であった。試験した他の組織(脾臓、膵臓、肺)は、GSH含量において1.1倍および1.2倍の増加を示した。移植したL1210腫瘍におけるGSHもまた、わずか1.2倍上昇した。
全心筋虚血(global myocardial ischemia)後の作動しているイヌ心臓の回復
J.E.Foker(米国特許第4,605,644号)の実施例1〜2に報告されるように、ノーマルな(0.9%)生理食塩水中のリボースの希釈溶液がイヌモデルにおいて心筋虚血後のATP回復時間を減少させるのに有効であることが見出された。例えば、リボースで80mMであるノーマルな生理食塩水の約1ml/分の速度での約24.0時間の注入により、ATP回復時間が8分の1に減少した。この処置期間の間、約17.0gのリボースを循環系に導入した;総用量は体重1kgあたり約550〜770mgのリボースであった。所定のヒト被験体におけるATPレベルおよび心機能の最適な回復のために適切な用量は、ATPレベル、心機能などについての公知のアッセイを含む経験的な研究によって、容易に確立され得る。
Claims (27)
- 低酸素状態に脅かされているか、または低酸素状態に苦しむ哺乳動物において低酸素症を処置するために、ATPレベルおよびグルタチオンレベルの両方を維持、回復または増加させるために有効な医薬を調製するための、RibCysまたはその薬学的に受容可能な塩の使用。
- 前記低酸素症が虚血性発作に起因する、請求項1に記載の使用。
- 前記虚血性発作が、心臓外科手術、臓器移植、血管形成またはステント留置術の間に生じる、請求項2に記載の使用。
- 前記虚血性発作が、心血管疾患、心筋症、気絶心筋、末梢血管疾患、間欠跛行、頻脈または虚血性再灌流に起因する、請求項2に記載の使用。
- 前記低酸素症が、感受性、身体的体重圧力、敗血症、脳卒中、外科的手順、熱傷、肺機能不全、身体運動または慢性疾病に起因する、請求項1に記載の使用。
- 低酸素症に供している哺乳動物を、その組織におけるATPレベルおよびグルタチオン(GSH)レベルの両方を維持、回復または増加させるために有効な一定量の2(R,S)−D−リボ−(1’,2’,3’,4’−テトラヒドロキシブチル)チアゾリジン−4(R)−カルボン酸(RibCys)またはその薬学的に受容可能な塩で処置する工程を包含する、治療方法。
- 前記哺乳動物がヒトである、請求項6に記載の方法。
- 前記RibCysが経口投与される、請求項6または7に記載の方法。
- 前記RibCysが非経口投与される、請求項6または7に記載の方法。
- 前記RibCysが、静脈内投与または腹腔内投与される、請求項9に記載の方法。
- 前記哺乳動物が、虚血性発作に供されていたか、虚血性発作に供しているかまたは虚血性発作に供される、請求項6または7に記載の方法。
- 前記組織が心血管組織である、請求項11に記載の方法。
- 前記組織が心筋組織である、請求項12に記載の方法。
- 前記虚血性発作が、心臓外科手術、臓器移植、血管形成またはステント留置術の間に生じる、請求項11に記載の方法。
- 前記RibCys溶液が、心臓の心室に直接注入されるか、または静脈内に注入される、請求項14に記載の方法。
- 前記虚血が、心血管疾患、心筋症、気絶心筋、末梢血管疾患、間欠跛行、頻脈または虚血性再灌流に起因する、請求項11に記載の方法。
- 前記低酸素症が、感受性、身体的体重圧力、敗血症、脳卒中、外科的手順、熱傷、肺機能不全、身体運動または慢性疾病に起因する、請求項6または7に記載の方法。
- 前記体重圧力が圧迫潰瘍を生じる、請求項17に記載の方法。
- 前記慢性疾病がウイルス感染に起因する、請求項17に記載の方法。
- 前記ウイルス感染が、HCMV、HIVまたはEBVに起因する、請求項19に記載の方法。
- 前記慢性疾病が細菌感染に起因する、請求項18に記載の方法。
- 前記慢性疾病が癌である、請求項18に記載の方法。
- 低酸素事象の間に哺乳動物の組織においてリボースおよびシステインが上昇するように、低酸素症に対する該哺乳動物の耐性を増大させるために有効な量でRibCysを該哺乳動物に投与する工程を包含する、治療方法。
- 前記哺乳動物がヒトである、請求項23に記載の方法。
- RibCysが、約10グラム〜150グラムの投薬量で投与される、請求項6、7、23または24に記載の方法。
- 前記RibCysまたはその塩が、前記低酸素事象の発生の少なくとも5分前に投与される、請求項23に記載の方法。
- 前記RibCysまたはその塩が、投与前のRibCysのインビトロ解離を阻害するために有効な量の遊離リボースを含む液体ビヒクルに投与される、請求項6、7、23または24に記載の方法。
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US10/990,933 US20060105972A1 (en) | 2004-11-17 | 2004-11-17 | Method to enhance delivery of glutathione and ATP levels in cells |
PCT/US2005/041458 WO2006055597A1 (en) | 2004-11-17 | 2005-11-16 | Use of ribose-cysteine to treat hypoxia by enhancing delivery of glutathione and atp levels in cells |
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US (4) | US20060105972A1 (ja) |
EP (1) | EP1824481B1 (ja) |
JP (1) | JP2008520681A (ja) |
KR (1) | KR20070095900A (ja) |
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CA (1) | CA2587616C (ja) |
DK (1) | DK1824481T3 (ja) |
EA (1) | EA014076B1 (ja) |
ES (1) | ES2390228T3 (ja) |
MX (1) | MX2007005835A (ja) |
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US20060105972A1 (en) * | 2004-11-17 | 2006-05-18 | Nagasawa Herbert T | Method to enhance delivery of glutathione and ATP levels in cells |
JP4982755B2 (ja) * | 2006-06-27 | 2012-07-25 | 国立大学法人 長崎大学 | 高速液体クロマトグラフィーによる糖及び類縁アルデヒド化合物の絶対配置決定法 |
US8685951B2 (en) * | 2007-03-27 | 2014-04-01 | The Board Of Trustees Of The University Of Arkansas | Compositions and methods for cytoprotection |
CA2757442A1 (en) * | 2008-04-02 | 2009-10-08 | Bioenergy, Inc. | Use of ribose in first response to acute myocardial infarction |
TW201202209A (en) * | 2010-01-28 | 2012-01-16 | Max International Llc | Methods of preparing thiazolidines |
TW201201712A (en) * | 2010-01-28 | 2012-01-16 | Max International Llc | Compositions comprising sugar-cysteine products |
US20110287109A1 (en) * | 2010-05-24 | 2011-11-24 | Max International, Llc | Compositions And Beverages Comprising Nutrients, Vitamins, Sugars, Cysteine, And/Or Sugar-Cysteine Products |
US20140348811A1 (en) * | 2011-07-27 | 2014-11-27 | Max International, Llc | Compositions comprising sugar-cysteine products |
US10702580B2 (en) * | 2015-05-22 | 2020-07-07 | The A2 Milk Company Limited | Beta-casein A2 and antioxidant capacity |
US20160367620A1 (en) | 2015-06-19 | 2016-12-22 | Harry B. Demopoulos | Glutathione |
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- 2005-11-16 PL PL05823154T patent/PL1824481T3/pl unknown
- 2005-11-16 WO PCT/US2005/041458 patent/WO2006055597A1/en active Application Filing
- 2005-11-16 DK DK05823154.9T patent/DK1824481T3/da active
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ES2390228T3 (es) | 2012-11-07 |
EA200701017A1 (ru) | 2007-10-26 |
PL1824481T3 (pl) | 2012-11-30 |
MX2007005835A (es) | 2007-10-08 |
CN101060840A (zh) | 2007-10-24 |
US20090042822A1 (en) | 2009-02-12 |
US8501700B2 (en) | 2013-08-06 |
WO2006055597A1 (en) | 2006-05-26 |
AU2005307885B2 (en) | 2010-12-23 |
KR20070095900A (ko) | 2007-10-01 |
CA2587616A1 (en) | 2006-05-26 |
US9144570B2 (en) | 2015-09-29 |
EP1824481A1 (en) | 2007-08-29 |
US20160082029A1 (en) | 2016-03-24 |
AU2005307885A1 (en) | 2006-05-26 |
BRPI0516814A (pt) | 2008-09-23 |
US20130317072A1 (en) | 2013-11-28 |
EP1824481B1 (en) | 2012-08-29 |
DK1824481T3 (da) | 2012-09-24 |
AU2005307885A2 (en) | 2006-05-26 |
US20060105972A1 (en) | 2006-05-18 |
CA2587616C (en) | 2015-03-17 |
EA014076B1 (ru) | 2010-08-30 |
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