JP4717110B2 - 生体適合性が改善されたカルニチンを含有する腹膜透析液 - Google Patents
生体適合性が改善されたカルニチンを含有する腹膜透析液 Download PDFInfo
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- JP4717110B2 JP4717110B2 JP2008500161A JP2008500161A JP4717110B2 JP 4717110 B2 JP4717110 B2 JP 4717110B2 JP 2008500161 A JP2008500161 A JP 2008500161A JP 2008500161 A JP2008500161 A JP 2008500161A JP 4717110 B2 JP4717110 B2 JP 4717110B2
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- Prior art keywords
- carnitine
- glucose
- solution
- pds
- peritoneal dialysis
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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Description
中皮は、透析液と最初に接触する器官であり、腹膜透析の間にその生存能を徐々に失う傾向がある。これは腹膜透析の際に観察される形態変化から明らかである (Di Paolo、N; et al、Nephron、1996; 74:594-9; Di Paolo、N; et al、Perit. Dial. Int.、2000; 20 (Suppl 3):Sl-100)。解剖学的損傷の徴候には、腹膜の潤滑性および分泌特性の低下が含まれる (Di Paolo、N、et al.; Nephron、1986; 44、365-370; Shambye、H.T.、et al.; Perit. Dial. Intern.、1992; 12、284-286)。この問題を取り除くために、非毒性物質を含む浸透圧の高い新規な溶液を見いだすことが医学分野で要求されている。理想的な PDSの特徴は周知である: 低グルコース、pH 7、良好な浸透圧、可塑剤、粒子および微量元素を含まないこと、および、インビトロおよびインビボでの良好な生体適合性である。
本発明は、約 0.02% w/v〜 約 0.5% w/vの濃度のL-カルニチンが、腹膜が腹膜透析液に曝されたときに腹膜に対して保護効果を発揮するという知見に基づく。したがって、本発明の目的は、約 0.02% w/v〜 約 0.5% w/vのカルニチンおよび少なくとも1つの腹膜透析のための浸透圧性薬剤、特にグルコース、さらにグルコースおよびキシリトールを含む腹膜透析用溶液である。
腹膜透析におけるカルニチンの使用の説明および腹膜透析の技術分野の関係での本発明の理解のためにWO 01/26649およびそれに引用される文献を参照されたい。
この実施例の目的は、本発明による腹膜透析液(PDS) と標準的炭酸水素塩グルコース 腹膜透析液とのインビトロおよびインビボ特徴を比較することである。
本発明者らは、グルコースのみ、グルコースおよびカルニチン、キシリトールおよびグルコース、またはキシリトール、グルコースおよびカルニチンのいずれかを含む様々なPDS の存在下で培養したウサギ腹膜中皮細胞の増殖、形態および機能を研究した(様々なPDSの実際の組成は以下を参照されたい)。グルコースは2種類の濃度(1.36および3.86 %、w/v)で存在した。カルニチンも2種類の濃度(0.05および0.2 %、w/v)で存在した。キシリトール濃度はしかし、1% (w/v)に固定した。
1)中皮細胞培養の増殖;
2)PLPおよびPCの中皮細胞による分泌;
3)PgE2の中皮細胞による分泌;
4) 中皮細胞による LDH 放出。
ウサギ中皮細胞培養物を調製し、以前に報告されているようにして細胞ペレットにて特徴決定した(Di Paolo 上記引用文献参照)。ウサギ中皮細胞の集密培養物をTC 225 cm2 フラスコ中に調製した。培地を除き、20 mlのPBS A バッファー中の0.1% トリプシン EDTA を各フラスコに添加し、層を数秒間浸した。トリプシン混合物を除いた後、細胞を37℃で5分間インキュベートして細胞を完全に解離させた。次いで20 mlの10% FCSを含む培地 199を各フラスコに添加した。細胞をDi Paoloに記載のように特徴決定した。
4つの試験PDS溶液を10% FCSを含む培地 199で20、40、60および80%に希釈した。溶液を含まない培地を対照として用いた。4つの溶液の各希釈液3.6 mlおよび純粋な培地を102のウェルに入れた(6/希釈および6対照)。0.4 mlの中皮細胞懸濁液 (30,000/ml)を各ウェルに播種した。インキュベーションは、37℃、5% CO2 および95%空気で行った。細胞増殖を毎日顕微鏡下で確認し、中皮細胞の数を7日間のインキュベーション後に算出した(Di Paolo 上記引用文献参照)。
中皮細胞について記載した培養手順を標準培地のみを用いて102のウェルにおいて繰り返した。6 日間のインキュベーションの後、培養上清を除き、4つのPDSを100% 濃度で添加した (各溶液について6つおよび対照として培地のみを6つ)。さらに6-時間のインキュベーションの後、上清を回収して、細胞機能効率の指標として全リン脂質(PLP)、ホスファチジルコリン (PC) (Kit、NEN、Dupont)およびPgE2 (RIA kit、New England Nuclear)、ならびに細胞毒性の指標としてLDHのアッセイに供した。
中皮細胞によるエイコサノイドの産生は腹膜の透析効率の価値ある指標である。この点に関して、本発明者らは、様々な PDSに曝した中皮細胞の上清におけるPgE2を測定した。試験した様々なPDSのなかで、最高のPgE2 レベルはXG-IおよびXGC-Iに曝された中皮細胞の上清においてみられ(表 4-6)、カルニチンを含有するPDS (XGC-I)はカルニチンを含有しないPDS (XG-I)と比べてPgE2の有意に高いレベルを示さなかった。さらに、PgE2 レベルの有意差は対照と後者2つのPDSとの間に観察されなかった (データ示さず)。最低のPgE2 レベルはG-2に曝した中皮細胞の上清においてみられた。しかし、このPDSにおけるカルニチンの存在(GC-2)は、回収されるPgE2の顕著な上昇を導いた。PCおよびPLP分泌について先に観察されたように、PgE2を分泌する能力も、G-2を含む培地と比べて程度は低いが、XG-2を含む培地において抑制されていた。カルニチンのXG2含有培地への添加(XGC-2)は、PgE2 レベルの統計的に有意な上昇を導いた (表 6)。
中皮細胞によるLDHの上清への放出は細胞損傷の有用なマーカーである。測定可能な量の LDHが試験したすべてのPDSに曝された中皮細胞の上清に存在していたが、しかし、カルニチンを含まないPDSはカルニチンを含むものよりも統計的に有意に高いレベルのLDHを放出した(G-2対GC-2、XG-I対XGC-I、およびGC-2 対XGC-2)。さらに、カルニチン含有 PDSの一つであるXGC-Iに曝された中皮細胞によるLDH 放出は対照細胞と同等であった(データ示さず)。本発明者らのデータはまた、PDS中のグルコース量が多いほど(G-2>XG-2>XG>1)、中皮細胞により放出されるLDH量は多いことを示す。
Claims (6)
- 以下の組成を有する腹膜透析のための溶液;
ナトリウムmmol/l :134
カルシウム mmol/l: 1.75
マグネシウム mmol/l: 0.5
塩化物mmol/l :103.5
炭酸水素 mmol/l: 34
pH 7.2
キシリトール% w/v :1.0
グルコース %w/v:0.36
L-カルニチン % w/v :0.05。 - 以下の組成を有する腹膜透析のための溶液;
ナトリウムmmol/l: 134
カルシウム mmol/l :1.75
マグネシウム mmol/l:0.5
塩化物mmol/l:103.5
炭酸水素 mmol/l: 34
pH 7.2
キシリトール % w/v:1.0
グルコース % w/v :2.86
L-カルニチン % w/v :0.2。 - 腹膜透析を必要とする患者の治療に有用な物質をさらに含む請求項1または2の溶液。
- 該物質が、血管拡張薬、利尿薬、ホルモン、ビタミン、抗酸化剤および抗線維化剤からなる群から選択される、請求項3の溶液。
- 該ビタミンが、葉酸、ビタミン B6、チアミン、およびそれらの医薬上許容される塩からなる群から選択される、請求項4の溶液。
- 請求項1-5のいずれかの溶液を含む腹膜透析のためのパッケージ。
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JP2001513370A (ja) * | 1997-08-07 | 2001-09-04 | グプタ,アジャイ | 水溶性ビタミン及び栄養素を含む透析溶液 |
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JP2006075195A (ja) * | 2004-09-07 | 2006-03-23 | Jms Co Ltd | Lカルニチン含有腹膜透析液 |
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US5126373A (en) | 1987-11-19 | 1992-06-30 | Henri Brunengraber | Composition for parenteral and oral nutrition |
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DE19748290B8 (de) | 1997-10-31 | 2009-09-03 | Fresenius Medical Care Deutschland Gmbh | Lösung für die Peritonealdialyse |
JP2002282354A (ja) | 2001-03-27 | 2002-10-02 | Jms Co Ltd | 腹膜透析液 |
GB0108359D0 (en) * | 2001-04-03 | 2001-05-23 | Allied Therapeutics Ltd | Peritoneal dialysis fluid |
ITRM20010337A1 (it) * | 2001-06-14 | 2002-12-16 | Sigma Tau Ind Farmaceuti | Soluzione per la conservazione e perfuzione di organi in attesa che vengano trapiantati. |
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JPH08131542A (ja) * | 1994-11-11 | 1996-05-28 | Baxter Kk | 腹膜透析液調製用溶液セット |
JP2001513370A (ja) * | 1997-08-07 | 2001-09-04 | グプタ,アジャイ | 水溶性ビタミン及び栄養素を含む透析溶液 |
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