JPH07278016A - Anticancer agent liposome pharmaceutical preparation - Google Patents

Anticancer agent liposome pharmaceutical preparation

Info

Publication number
JPH07278016A
JPH07278016A JP6074754A JP7475494A JPH07278016A JP H07278016 A JPH07278016 A JP H07278016A JP 6074754 A JP6074754 A JP 6074754A JP 7475494 A JP7475494 A JP 7475494A JP H07278016 A JPH07278016 A JP H07278016A
Authority
JP
Japan
Prior art keywords
liposome
anticancer
anticancer agent
neocarzinostatin
agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6074754A
Other languages
Japanese (ja)
Inventor
Masayuki Endo
正行 遠藤
Toyohiko Miki
豊彦 三木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pola Chemical Industries Inc
Original Assignee
Pola Chemical Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pola Chemical Industries Inc filed Critical Pola Chemical Industries Inc
Priority to JP6074754A priority Critical patent/JPH07278016A/en
Publication of JPH07278016A publication Critical patent/JPH07278016A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/10Dispersions; Emulsions
    • A61K9/127Liposomes

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Dispersion Chemistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Preparation (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

PURPOSE:To obtain an anticancer agent liposome pharmaceutlcal preparation having high anticancer effects and safety due to high cancer orientation properties. CONSTITUTION:This anticancer agent liposome pharmaceutlcal preparation contains phosphatldylethanolamine in an amount of 5-50wt.%, preferably 10-30wt.% based on the weight of a lipid in a fat membrane and further the anticancer agent in the contents. An anticancer antibiotic substance such as neocarzinostatin, a metabolic antagonistic agent such as futraful, a vegetable alkaloid such as vinblastine, an alkylating agent such as a nitrogen mustard, etc., are cited as the anticancer agent. The neocarzinostatin having high toxicity and anticancer effects is the optimum. The liposome pharmaceutical preparation is preferably produced by once preparing a crude liposome by a solution method, treating the resultant liposome in an extruder and sphering the crude liposome. Thereby, the fine and uniform pharmaceutical preparation can be provided without heating the medicine and is useful for formulating the anticancer agent poor in stability to heat into the liposome pharmaceutical preparation.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、抗癌効果及び安全性の
高い抗癌剤リポソーム製剤に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticancer drug liposome preparation having high anticancer effect and safety.

【0002】[0002]

【従来の技術】現在癌は死亡原因のトップを占める疾病
であり、その根本的な治療方法が求められている。その
ため、ブレオマイシン、シスプラチン、ネオカルチノス
タチン等の多くの抗癌剤が開発されてきた。しかしなが
ら、これらの抗癌剤は毒性が高い上に癌への配向性が低
いため、充分な抗癌効果を得ることができなかった。こ
のことから、これら抗癌剤をより多く癌に配向せしめる
試みが各種為されてきた。
2. Description of the Related Art Cancer is currently the leading cause of death, and a radical treatment method is required. Therefore, many anticancer agents such as bleomycin, cisplatin and neocarzinostatin have been developed. However, since these anticancer agents are highly toxic and have low orientation to cancer, a sufficient anticancer effect cannot be obtained. From this, various attempts have been made to orient these anticancer agents toward cancer.

【0003】例えば、抗癌剤をリポソーム内部に包含さ
せて投与するリポソーム製剤、血管造影剤であるヨード
トリルとともに抗癌剤を動脈投与する動注閉塞療法、抗
癌モノクローナル抗体と抗癌剤を結合せしめた、いわゆ
るミサイル療法などが考え出された。
For example, a liposome preparation in which an anticancer agent is contained in a liposome and administered, an intraarterial occlusion therapy in which an anticancer agent is arterially administered together with an angiographic agent iodotolyl, a so-called missile therapy in which an anticancer monoclonal antibody and an anticancer agent are combined, and the like. Was devised.

【0004】しかしながら、リポソーム製剤は、癌配向
性の向上が今一つであるという欠点があり、動注閉塞療
法にはこの方法が用いることのできる癌種が極めて限ら
れていると言う欠点があり、ミサイル療法には、抗癌モ
ノクローナル抗体が極めて高価で生産しにくい、抗体が
生体由来物質であるため安定性に問題がある等の欠点が
あった。即ち、言い換えれば、癌配向性を高め、抗癌効
果を向上させたり、安全性を向上させたりし得る抗癌剤
の製剤は得られていないのが実情である。
However, the liposome preparation has a drawback in that the improvement of the cancer orientation is yet to be achieved, and the arterial injection obstruction therapy has a drawback in that the types of cancer that can be used in this method are extremely limited. Missile therapy has drawbacks such that anti-cancer monoclonal antibody is extremely expensive and difficult to produce, and stability is problematic because the antibody is a substance of biological origin. That is, in other words, the reality is that no anti-cancer agent formulation has been obtained that can enhance the cancer orientation, enhance the anti-cancer effect, or enhance the safety.

【0005】[0005]

【発明が解決しようとする課題】従って、本発明の目的
はかかる抗癌効果と安全性に優れる抗癌剤リポソーム製
剤を提供することにある。
Therefore, an object of the present invention is to provide an anticancer drug liposome preparation which is excellent in such anticancer effect and safety.

【0006】[0006]

【課題を解決するための手段】斯かる実情に鑑み、本発
明者らは鋭意研究を重ねた結果、リポソームを構成する
脂質中にフォスファチジルエタノールアミンを加えるこ
とにより、抗癌効果と安全性の双方が向上した抗癌剤リ
ポソーム製剤が提供できることを見出し本発明を完成さ
せた。
In view of such circumstances, the inventors of the present invention have conducted extensive studies and as a result, as a result of adding phosphatidylethanolamine to the lipids constituting the liposome, the anticancer effect and the safety are improved. It was found that an anticancer drug liposome preparation in which both of the above are improved can be provided, and the present invention has been completed.

【0007】即ち本発明は、脂質膜中にフォスファチジ
ルエタノールアミンを含有し、内容物に抗癌剤を含むこ
とを特徴とする抗癌剤リポソーム製剤を提供するもので
ある。
[0007] That is, the present invention provides an anticancer drug liposome preparation characterized by containing phosphatidylethanolamine in a lipid membrane and containing an anticancer drug in the contents.

【0008】以下、本発明について詳細に説明する。The present invention will be described in detail below.

【0009】リポソーム製剤とは脂質二重膜構造からな
る粒子の内部に薬物を内包せしめた製剤であり、本発明
の抗癌剤リポソーム製剤は、この脂質二重膜にフォスフ
ァチジルエタノールアミンを含むことを特徴とする。即
ち、リポソームの脂質二重膜の成分としてフォスファチ
ジルエタノールアミンを加えることにより、安全性が高
まり、抗癌効果が著しく向上する。これはフォスファチ
ジルエタノールアミンを加えることにより癌への配向性
が向上するためと推測される。
The liposome preparation is a preparation in which a drug is encapsulated inside particles having a lipid bilayer structure. The anticancer drug liposome preparation according to the present invention is characterized in that the lipid bilayer contains phosphatidylethanolamine. Characterize. That is, by adding phosphatidylethanolamine as a component of the lipid bilayer of the liposome, the safety is enhanced and the anticancer effect is significantly improved. It is speculated that this is because the addition of phosphatidylethanolamine improves the orientation to cancer.

【0010】本発明の抗癌剤リポソーム製剤に於けるフ
ォスファチジルエタノールアミンの好適な含有量は脂質
の重量に対して5〜50重量%である。これは、脂質の
重量に対して5重量%未満では癌への配向性が低く抗癌
効果の増強や安全性の向上に寄与しないため適当ではな
く、脂質の重量に対して50重量%を超えて配合しても
効果が向上せず、適当でない。更に好適な配合量は脂質
の重量に対して10〜30重量%である。
The preferred content of phosphatidylethanolamine in the anticancer drug liposome preparation of the present invention is 5 to 50% by weight based on the weight of lipid. This is not suitable when the amount is less than 5% by weight based on the weight of the lipid, since the orientation to cancer is low and it does not contribute to the enhancement of the anti-cancer effect and the improvement of safety, and the amount exceeds 50% by weight based on the weight of the lipid. Is not suitable because the effect is not improved even if it is mixed. A more preferable blending amount is 10 to 30% by weight based on the weight of lipid.

【0011】抗癌剤リポソーム製剤に配合する抗癌剤と
しては、特に限定はされないが、ネオカルチノスタチ
ン、アドリアマイシン、ブレオマイシン、アクチノマイ
シン、マイトマイシンの様な抗癌抗生物質、フトラフー
ル、テガフール等の代謝拮抗剤、ビンプラスチン、ビン
クリスチン等の植物アルカロイド、ナイトロジェンマス
タード、シクロフォスファミド等のアルキル化剤等が例
示できる。このうち、リポソーム製剤としては、毒性も
抗癌効果も高いネオカルチノスタチンが最も好適であ
る。
Anti-cancer agent The anti-cancer agent to be added to the liposome preparation is not particularly limited, but anti-cancer antibiotics such as neocarzinostatin, adriamycin, bleomycin, actinomycin, mitomycin, antimetabolites such as futraful, tegafur, and vin. Examples include plant alkaloids such as plastin and vincristine, and alkylating agents such as nitrogen mustard and cyclophosphamide. Of these, neocarzinostatin is most suitable as the liposome preparation because of its high toxicity and anticancer effect.

【0012】抗癌剤をリポソーム製剤にする方法として
は、超音波分散法、溶液法、エクストルージョン法の3
種類が知られている。このうち最も一般的なものが超音
波分散法であり、これはフラスコ等の容器の表面に脂質
の薄膜を作り、これに水性担体に溶解させた薬物を加
え、超音波をかけることにより、薄膜をこの水性担体中
に分散させる製造法であり、この方法では超音波分散時
に発熱が起こることが避けられず、熱安定性の低い抗癌
剤のリポソーム製剤化には好ましくない。
There are three methods for making an anticancer agent into a liposome preparation: ultrasonic dispersion method, solution method and extrusion method.
The type is known. The most common of these is the ultrasonic dispersion method, in which a thin film of lipid is made on the surface of a container such as a flask, a drug dissolved in an aqueous carrier is added to this, and ultrasonic waves are applied to form a thin film. Is a production method in which this is dispersed in an aqueous carrier. This method cannot avoid the generation of heat during ultrasonic dispersion, and is not preferable for the preparation of liposomes of anticancer agents having low thermal stability.

【0013】又、溶液法は脂質を一度グリセリンやプロ
ピレングリコール等の多価アルコールに溶かし込み、こ
れに生理食塩水等の水性担体に溶解させた薬物を徐々に
加えリポソームを作成する方法である。この方法では加
熱工程は脂質を多価アルコールに溶かし込む際の脂質を
溶解する工程のみであり、直接薬物に熱を与えないと言
う長所がある。しかし、得られたリポソームの粒子径が
大きく、粒子の大きさのバラツキも大きい。
The solution method is a method in which a lipid is once dissolved in a polyhydric alcohol such as glycerin or propylene glycol, and then a drug dissolved in an aqueous carrier such as physiological saline is gradually added to form a liposome. In this method, the heating step is only a step of dissolving the lipid when the lipid is dissolved in the polyhydric alcohol, and has an advantage that the drug is not directly heated. However, the obtained liposomes have a large particle size, and the particle sizes vary greatly.

【0014】エクストルージョン法は脂質、エクストル
ーダー(リペックス・バイオメンブランス社(カナダ)
製)を用いて水性担体等の混合物を微細な穴より押し出
し、リポソームとする方法であるが、この方法によれば
微細で且つ大きさのバラツキの少ないリポソームが得ら
れる。但し、目詰まりを起こし易いので製造には注意を
要する。従って、本発明では、溶液法により一度粗リポ
ソームを作り、これをエクストルーダーにかけて粗リポ
ソームを整粒する方法により抗癌剤リポソーム製剤を製
造することが好ましい。この方法によれば、微細で均一
なリポソームを薬剤を加熱すること無く調製できるの
で、熱に対して安定性の悪い抗癌剤のリポソーム製剤化
には大変有益である。
Extrusion method is lipid, extruder (Repex Biomembranes (Canada)
This is a method in which a mixture of an aqueous carrier or the like is extruded through fine holes to prepare liposomes. According to this method, fine liposomes with small size variations can be obtained. However, it is apt to cause clogging, so caution is required in manufacturing. Therefore, in the present invention, it is preferable that the anti-cancer agent liposome preparation is produced by a method in which crude liposomes are once prepared by a solution method and then the crude liposomes are sized by applying an extruder. According to this method, since fine and uniform liposomes can be prepared without heating the drug, it is very useful for preparing a liposome preparation of an anticancer drug having poor heat stability.

【0015】従って、本発明抗癌剤リポソーム製剤を製
造するには、脂質を多価アルコールに溶解せしめ、これ
に抗癌剤の水性担体溶液を加えたものをエクストルージ
ョン処理する方法が好ましい。
Therefore, in order to produce the anticancer drug liposome preparation of the present invention, a method in which a lipid is dissolved in a polyhydric alcohol and an aqueous carrier solution of the anticancer drug is added thereto and subjected to an extrusion treatment is preferable.

【0016】本発明に用いる脂質はリポソームを作成し
うる脂質であれば、特に限定されず、微細で均一なリポ
ソームとすることができる。このような脂質としては、
例えば、フォスファチジルコリン、フォスファチジルイ
ノシトール、フォスファチジルエタノールアミン、フォ
スファチジルセリン、フォスファチジルグリセロール、
ジフォスファチジルグリセロール、グリセロリン脂質、
スフィンゴミエリン等のスフィンゴリン脂質、コレステ
ロール等が挙げられ、これらの脂質は2種以上を混合し
て用いてもよいが、フォスファチジルエタノールアミン
は必ず含まれていなければならない。
The lipid used in the present invention is not particularly limited as long as it is a lipid capable of forming liposomes, and fine and uniform liposomes can be used. Such lipids include
For example, phosphatidylcholine, phosphatidylinositol, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol,
Diphosphatidylglycerol, glycerophospholipid,
Examples thereof include sphingolin phospholipids such as sphingomyelin, cholesterol, and the like. These lipids may be used as a mixture of two or more kinds, but phosphatidylethanolamine must be contained.

【0017】また、多価アルコールとしては、エチレン
グリコール、プロピレングリコール、グリセリン等が例
示される。
Examples of polyhydric alcohols include ethylene glycol, propylene glycol, glycerin and the like.

【0018】本発明方法では、まず脂質を多価アルコー
ルに溶解せしめる。この脂質と多価アルコールとの比
は、脂質/多価アルコール=0.03〜0.3(重量
比)とすることが好ましい。また脂質は例えば70〜9
0℃に加熱溶解してから、多価アルコールを加えること
が好ましい。
In the method of the present invention, the lipid is first dissolved in the polyhydric alcohol. The lipid / polyhydric alcohol ratio is preferably lipid / polyhydric alcohol = 0.03 to 0.3 (weight ratio). The lipid is, for example, 70-9
It is preferable to add the polyhydric alcohol after heating and dissolving at 0 ° C.

【0019】この後、これに抗癌剤の水性担体溶液を加
えるが、ここで用いる抗癌剤の水性担体としては、燐酸
緩衝生理食塩水(PBS)、リンゲル液、乳酸リンゲル
液等の各種緩衝液を用いることが好ましい。薬効成分含
有の水性担体は、脂質と多価アルコールの混合物に対し
て、1〜3倍程度加えることが好ましい。
Thereafter, an aqueous carrier solution of the anticancer agent is added to this, and as the aqueous carrier of the anticancer agent used here, it is preferable to use various buffer solutions such as phosphate buffered saline (PBS), Ringer's solution, Ringer's lactate solution and the like. . The aqueous carrier containing the medicinal component is preferably added about 1 to 3 times the mixture of the lipid and the polyhydric alcohol.

【0020】エクストルージョン処理は、エクストルー
ダー(例えば、リペックス・バイオメンブランス社(カ
ナダ)製のもの)を用いて水性担体等の混合物を微細な
穴より押し出し、リポソームとする方法である。この方
法によれば微細で且つ大きさのバラツキの少ないリポソ
ームが得られる。しかしながら、前記の処理を行わずに
エクストルージョン処理を行っても、エクストルーダー
のフィルターが目詰まりを起こしてしまいリポソームが
得られない。
The extrusion treatment is a method in which a mixture such as an aqueous carrier is extruded through fine holes using an extruder (for example, manufactured by Lipex Biomembranes (Canada)) to form liposomes. According to this method, it is possible to obtain liposomes which are fine and have little variation in size. However, even if the extrusion treatment is carried out without the above treatment, the filter of the extruder is clogged and the liposome cannot be obtained.

【0021】かくして得られたリポソーム製剤はそのま
ま静脈注射用、動脈注射用、病巣内注射用の医薬製剤と
して使用することができるが、更にゲル濾過、透析等に
より精製するのが好ましい。また、これに糖類等を添加
することもできる。
The liposome preparation thus obtained can be used as it is as a pharmaceutical preparation for intravenous injection, arterial injection and intralesional injection, but it is preferably further purified by gel filtration, dialysis and the like. In addition, sugars and the like can be added thereto.

【0022】[0022]

【実施例】以下に実施例を挙げ、本発明について更に詳
しく説明するが、本発明がこれら実施例に限定を受けな
いことは言うまでもない。なお、以下の実施例で用いた
エクストルーダーのフィルターは全て100nmのポアサ
イズのフィルターを用いた。
The present invention will be described in more detail with reference to the following examples, but it goes without saying that the present invention is not limited to these examples. In addition, as the filters of the extruder used in the following examples, filters having a pore size of 100 nm were used.

【0023】参考例1 下記の処方に従って超音波分散法及び溶液−エクストル
ージョン法でネオカルチノスタチンのリポソームを作成
した。
Reference Example 1 Neocarzinostatin liposomes were prepared by an ultrasonic dispersion method and a solution-extrusion method according to the following formulation.

【0024】[0024]

【表1】 (処方) (重量%) (A)大豆レシチン 2.5 コレステロール 1 (B)プロピレングリコール 7 グリセリン 7 (C)燐酸緩衝生理食塩水(PBS) 82.5 ネオカルチノスタチン 5455単位/PBS1ml[Table 1] (Prescription) (% by weight) (A) Soy lecithin 2.5 Cholesterol 1 (B) Propylene glycol 7 Glycerin 7 (C) Phosphate buffered saline (PBS) 82.5 Neocarzinostatin 5455 units / PBS 1 ml

【0025】(1)超音波分散法 (A)にジクロロメタンを十倍量加え(A)の成分を溶
解した後溶媒を減圧留去し薄膜とし、これに(B)と
(C)を加え超音波をかけて分散しリポソームを得た。
これをゲル濾過にかけ、内包されていないネオカルチノ
スタチンを取り除きリポソーム製剤を得た。
(1) Ultrasonic Dispersion Method Dichloromethane was added to (A) ten times to dissolve the components of (A), and then the solvent was distilled off under reduced pressure to form a thin film. (B) and (C) were added to the dispersion. A sonic wave was applied to disperse to obtain a liposome.
This was subjected to gel filtration to remove non-encapsulated neocarzinostatin to obtain a liposome preparation.

【0026】(2)溶液−エクストルージョン法 (A)を80℃で加熱溶解しこれに(B)を加え溶液と
し、室温にして(C)を徐々に攪拌しながら加え粗リポ
ソームとし、これをエクストルーダーにかけてリポソー
ムを得た。これをゲル濾過にかけ、内包されていないネ
オカルチノスタチンを取り除きリポソーム製剤を得た。
(2) Solution-Extrusion Method (A) is dissolved by heating at 80 ° C., (B) is added to the solution to obtain a solution, and (C) is slowly stirred to obtain a crude liposome. It was put through an extruder to obtain a liposome. This was subjected to gel filtration to remove non-encapsulated neocarzinostatin to obtain a liposome preparation.

【0027】リポソーム作成後ゲル濾過により、リポソ
ームに内包されていないネオカルチノスタチンを取り除
き、リポソームネオカルチノスタチン製剤を得た。作成
後リポソーム中に含まれるネオカルチノスタチンの量を
トリトーンを1%加えてリポソームを破壊した後、マイ
クロコッカス・ルテウスを用いた抗菌活性により定量し
たところ下記の表2に示すようになった。本発明の溶液
−エクストルーダー法で作成したものではネオカルチノ
スタチンが分解されずに内包されているが、超音波分散
では分解されているためネオカルチノスタチンの含有量
が低下していることが判る。
After the liposome was prepared, the neocarzinostatin not encapsulated in the liposome was removed by gel filtration to obtain a liposome neocarzinostatin preparation. After the preparation, the amount of neocarzinostatin contained in the liposome was added with 1% of tritone to destroy the liposome, and then the amount was quantified by antibacterial activity using Micrococcus luteus. The results are shown in Table 2 below. In the solution-extruder method of the present invention, neocarzinostatin is encapsulated without being decomposed, but the content of neocarzinostatin is reduced because it is decomposed by ultrasonic dispersion. I understand.

【0028】[0028]

【表2】 [Table 2]

【0029】実施例1 下記処方に従って参考例1の溶液−エクストルージョン
法によりネオカルチノスタチンのリポソーム製剤を得
た。抗癌効果
Example 1 A liposome formulation of neocarzinostatin was obtained by the solution-extrusion method of Reference Example 1 according to the following formulation. Anti-cancer effect

【0030】[0030]

【表3】 (処方) (重量%) (A)大豆レシチン 1.75 コレステロール 0.875 フォスファチジルエタノールアミン 0.875 (B)プロピレングリコール 7 グリセリン 7 (C)燐酸緩衝生理食塩水 82.5 ネオカルチノスタチン 5455単位/PBS1ml[Table 3] (Formulation) (% by weight) (A) Soybean lecithin 1.75 Cholesterol 0.875 Phosphatidylethanolamine 0.875 (B) Propylene glycol 7 Glycerin 7 (C) Phosphate buffered saline 82.5 Neocarzinostatin 5455 units / PBS 1 ml

【0031】(製造法)(A)を80℃で加熱溶解し、
これに(B)を加え溶液とし、室温にして(C)を徐々
に攪拌しながら加え粗リポソームとし、これをエクスト
ルーダーにかけリポソームを得た。これをゲル濾過にか
け内包されていないネオカルチノスタチンを取り除き、
リポソーム製剤を得た。抗菌活性で内包されているネオ
カルチノスタチンの量を定量したところ1400単位/
mlであった。
(Production method) (A) is heated and dissolved at 80 ° C.,
To this, (B) was added to form a solution, and at room temperature, (C) was added with gradual stirring to form a crude liposome, which was subjected to an extruder to obtain a liposome. This is subjected to gel filtration to remove non-encapsulated neocarzinostatin,
A liposome preparation was obtained. The amount of neocarzinostatin included in antibacterial activity was quantified to be 1400 units /
It was ml.

【0032】実施例2 下記表4に示す処方でエクストルージョン法のみ、溶液
法のみ及び本発明方法の3つの方法によりリポソームを
製造した。得られたリポソームの平均粒径も表4に示
す。
Example 2 Liposomes were prepared according to the formulations shown in Table 4 below by the extrusion method only, the solution method only and the method of the present invention. The average particle size of the obtained liposomes is also shown in Table 4.

【0033】[0033]

【表4】 [Table 4]

【0034】(1)エクストルージョン法 上記処方の(A)に、(A)の50倍量のジクロロメタ
ンを加え溶解した後、溶媒を減圧留去し、薄膜を作製し
た。これに(B)を加え、よく振盪し粗リポソームを得
た。これをエクストルーダーにかけたが、何れの処方の
ものもフィルターに目詰まりを起こしリポソームは得ら
れなかった。
(1) Extrusion Method To the above-mentioned formulation (A), 50 times the amount of dichloromethane (A) was added and dissolved, and then the solvent was distilled off under reduced pressure to form a thin film. (B) was added thereto and shaken well to obtain a crude liposome. This was put through an extruder, but with any of the formulations, the filter was clogged and liposomes could not be obtained.

【0035】(2)溶液法 処方(A)を加熱溶解した後、室温に冷却し、攪拌しな
がら(B)を徐々に滴下して、リポソームを製造した。 (3)本発明方法 処方中の(A)を加熱溶解した後、室温に冷却し、攪拌
しながら(B)を徐々に滴下して、粗リポソームを得
た。これをエクストルーダーにかけ、リポソームを得
た。
(2) Solution Method After dissolving the formulation (A) by heating, the solution was cooled to room temperature and (B) was gradually added dropwise with stirring to produce liposomes. (3) Method of the present invention (A) in the formulation was dissolved by heating, cooled to room temperature, and slowly added (B) while stirring to obtain crude liposomes. This was put through an extruder to obtain a liposome.

【0036】試験例1 急性毒性 参考例1(溶液−エクストルージョン法による)及び実
施例1のリポソーム製剤とネオカルチノスタチンについ
て、ICRマウスを用いて急性毒性を求めた。即ち、B
ALB/c(雄性、20〜25g)にそれぞれの生理食
塩水希釈溶液を腹腔投与で投与し、投与後14日後に生
死を判定した。LD50値は、参考例1のリポソーム製剤
が1400単位/kg、実施例1のリポソーム製剤が83
00単位/kg、ネオカルチノスタチンが2450単位/
kgであった。これより、フォスファチジルエタノールア
ミンを含むリポソーム製剤にすることにより安全性が高
まることが判る。
Test Example 1 Acute Toxicity The liposome preparation of Reference Example 1 (by the solution-extrusion method) and Example 1 and neocarzinostatin were tested for acute toxicity using ICR mice. That is, B
ALB / c (male, 20 to 25 g) was intraperitoneally administered with each diluted physiological saline solution, and life or death was determined 14 days after the administration. The LD 50 value was 1400 units / kg for the liposome preparation of Reference Example 1 and 83 for the liposome preparation of Example 1.
00 units / kg, neocarzinostatin 2450 units /
It was kg. From this, it is understood that the safety is enhanced by using the liposome preparation containing phosphatidylethanolamine.

【0037】試験例2 抗癌効果 予め、前培養したC−1300細胞を7週齢のA/Jマ
ウス(雄性)に、1×106個尾静脈より静脈投与し、
移植した。移植後7日目に各種の投与量で実施例1のリ
ポソーム製剤又はネオカルチノスタチンの生理食塩水希
釈溶液を投与した。移植後14日目に屠殺し、肝臓を取
り出し癌の肝転移結節数を数えた。結果を図1に示す。
これより、実施例1のリポソーム製剤はネオカルチノス
タチンと同程度に抗癌効果に優れていることが判る。従
って、試験例1の結果及びこの結果を考え合わせれば、
実施例1のリポソーム製剤は抗癌効果に優れていること
が明らかである。
Test Example 2 Anticancer Effect Pre-cultured C-1300 cells were intravenously administered to 7-week-old A / J mice (male) through 1 × 10 6 tail vein,
Transplanted. Seven days after the transplantation, the liposome preparation of Example 1 or neocarzinostatin diluted with physiological saline was administered at various doses. The mice were sacrificed 14 days after the transplantation, the livers were taken out, and the number of liver metastasis nodules of cancer was counted. The results are shown in Fig. 1.
From this, it is understood that the liposome preparation of Example 1 is as excellent in anticancer effect as neocarzinostatin. Therefore, considering the results of Test Example 1 and this result,
It is clear that the liposome preparation of Example 1 has an excellent anticancer effect.

【0038】[0038]

【発明の効果】本発明の抗癌剤リポソーム製剤は、癌配
向性が高いため、抗癌効果及び安全性が高い。
INDUSTRIAL APPLICABILITY Since the anticancer drug liposome preparation of the present invention has high cancer orientation, it has high anticancer effect and safety.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明方法の抗癌剤リポソーム製剤の抗癌効果
を示す図である。
FIG. 1 is a graph showing the anticancer effect of the anticancer drug liposome preparation of the method of the present invention.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 A61K 31/71 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location A61K 31/71

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 脂質膜中にフォスファチジルエタノール
アミンを含有し、内容物に抗癌剤を含むことを特徴とす
る抗癌剤リポソーム製剤。
1. A liposome preparation for anticancer drug comprising phosphatidylethanolamine in a lipid membrane and an anticancer drug in the contents.
【請求項2】 抗癌剤がネオカルチノスタチンである請
求項1記載の抗癌剤リポソーム製剤。
2. The anticancer drug liposome preparation according to claim 1, wherein the anticancer drug is neocarzinostatin.
JP6074754A 1994-04-13 1994-04-13 Anticancer agent liposome pharmaceutical preparation Pending JPH07278016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6074754A JPH07278016A (en) 1994-04-13 1994-04-13 Anticancer agent liposome pharmaceutical preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6074754A JPH07278016A (en) 1994-04-13 1994-04-13 Anticancer agent liposome pharmaceutical preparation

Publications (1)

Publication Number Publication Date
JPH07278016A true JPH07278016A (en) 1995-10-24

Family

ID=13556383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6074754A Pending JPH07278016A (en) 1994-04-13 1994-04-13 Anticancer agent liposome pharmaceutical preparation

Country Status (1)

Country Link
JP (1) JPH07278016A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997048398A1 (en) * 1996-06-18 1997-12-24 Kyowa Hakko Kogyo Co., Ltd. Liposome preparations of indolocarbazole derivatives
WO2006095798A1 (en) * 2005-03-09 2006-09-14 Sunstar Inc. Anticancer composition for oral use comprising liposome containing phytosterols and prevention or treatment for cancer using the liposome
JP2012520245A (en) * 2009-03-10 2012-09-06 ピリジェン ソシエタ ア レスポンサビリタ リミタータ Glycerosomes and their use in pharmaceutical and cosmetic preparations for topical application

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997048398A1 (en) * 1996-06-18 1997-12-24 Kyowa Hakko Kogyo Co., Ltd. Liposome preparations of indolocarbazole derivatives
US6045822A (en) * 1996-06-18 2000-04-04 Kyowa Hakko Kogyo Co., Ltd. Liposome preparations of indolocarbazole derivatives description
AU718856B2 (en) * 1996-06-18 2000-04-20 Kyowa Hakko Kogyo Co. Ltd. Liposome preparations of indolocarbazole derivatives
WO2006095798A1 (en) * 2005-03-09 2006-09-14 Sunstar Inc. Anticancer composition for oral use comprising liposome containing phytosterols and prevention or treatment for cancer using the liposome
JPWO2006095798A1 (en) * 2005-03-09 2008-08-14 サンスター株式会社 Oral composition for anticancer containing liposome containing phytosterol, prevention or treatment of cancer by the liposome
JP2012520245A (en) * 2009-03-10 2012-09-06 ピリジェン ソシエタ ア レスポンサビリタ リミタータ Glycerosomes and their use in pharmaceutical and cosmetic preparations for topical application

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