JP3538453B2 - Dopamine release promoter - Google Patents

Dopamine release promoter

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Publication number
JP3538453B2
JP3538453B2 JP16005294A JP16005294A JP3538453B2 JP 3538453 B2 JP3538453 B2 JP 3538453B2 JP 16005294 A JP16005294 A JP 16005294A JP 16005294 A JP16005294 A JP 16005294A JP 3538453 B2 JP3538453 B2 JP 3538453B2
Authority
JP
Japan
Prior art keywords
pro
dopamine
tetrapeptide
dopamine release
tyr
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.)
Expired - Fee Related
Application number
JP16005294A
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Japanese (ja)
Other versions
JPH0827022A (en
Inventor
明重 素本
淳 倉成
英彦 横越
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.)
Calpis Co Ltd
Original Assignee
Calpis Co Ltd
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Priority to JP16005294A priority Critical patent/JP3538453B2/en
Publication of JPH0827022A publication Critical patent/JPH0827022A/en
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Expired - Fee Related legal-status Critical Current

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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、脳神経疾患治療薬とし
て有用なドーパミン遊離促進剤に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dopamine release promoter useful as a therapeutic agent for cranial nerve diseases.

【0002】[0002]

【従来の技術】中枢神経系の中でドーパミン作動性ニュ
ーロンは、ドーパミンを神経伝達物質としている。ドー
パミンは、ニューロン内でアミノ酸であるL−チロシン
より中間物質L−ドーパを経て生合成され、神経終末で
あるシナプス小胞内に貯蔵される。インパルスがシナプ
ス小胞内に到達すると、小胞よりドーパミンが放出さ
れ、シナプス膜上のレセプターに結合することで情報の
伝達及びその調節が行なわれると考えられる。
2. Description of the Related Art In the central nervous system, dopaminergic neurons use dopamine as a neurotransmitter. Dopamine is biosynthesized from the amino acid L-tyrosine in neurons via the intermediate L-dopa, and is stored in synaptic vesicles, which are nerve endings. When the impulse reaches the synaptic vesicle, dopamine is released from the vesicle, and it is considered that information transmission and regulation are performed by binding to a receptor on the synaptic membrane.

【0003】ドーパミン作動性ニューロンの細胞体は、
神経中枢の2つの部分、すなわち黒質と被蓋に存在して
おり、これらの細胞体は線条体に投射されるが、この部
分は運動系を調節している重要な部分であり、その部位
にドーパミンが欠損するとパーキンソン病の硬直と震え
が起きる。
[0003] The cell body of dopaminergic neurons is
Located in two parts of the nerve center, the substantia nigra and the tegment, these cell bodies are projected to the striatum, which is an important part of regulating the motor system. Deficiency of dopamine in the site causes stiffness and tremors of Parkinson's disease.

【0004】また、前脳辺縁系にもドーパミンが送られ
ているが、その部位は情動と関係しており、その活動部
分と***病が関係していると言われている。従来は、パ
ーキンソン病の治療薬として、L−ドーパが用いられて
いるが、長期間の使用により耐性が現れるという問題が
ある。
[0004] In addition, dopamine is also sent to the limbic system of the forebrain, and its site is related to emotion, and it is said that its active part is related to schizophrenia. Conventionally, L-dopa has been used as a remedy for Parkinson's disease, but there is a problem that long-term use results in tolerance.

【0005】最近、アミン、アミノ酸系神経伝達物質
(古典的伝達物質)の他に、ペプチド系の神経伝達物質
が存在することが明らかになっている。このうちモルヒ
ネ様の薬理作用を有し、オピオイド受容体に結合する一
群のペプチドをオピオイドペプチドと総称する。これら
のうち、メチオニン-エンケファリン、β-エンドルフィ
ン、ダイノルフィンは、神経末梢に作用してアセチルコ
リン、ノルアドレナリン等の神経伝達物質の遊離を抑制
し、鎮痛作用を示すと考えられている。このようにオピ
オイドペプチドについては、作用効果が明らかになりつ
つあるが、パーキンソン病治療効果を有するペプチドに
ついての報告はこれまでなされていない。
Recently, it has been revealed that peptide-based neurotransmitters exist in addition to amines and amino acid-based neurotransmitters (classical transmitters). Among these, a group of peptides having a morphine-like pharmacological action and binding to an opioid receptor are collectively referred to as opioid peptides. Of these, methionine-enkephalin, β-endorphin, and dynorphin are thought to act on the nerve periphery to suppress release of neurotransmitters such as acetylcholine and noradrenaline, and to exhibit an analgesic effect. As described above, the effects and effects of opioid peptides are being clarified, but no reports have been made on peptides having therapeutic effects on Parkinson's disease.

【0006】[0006]

【発明が解決しようとする課題】本発明の目的は、パー
キンソン病疾患治療薬として有用であるドーパミン作動
性ニューロンで生産され、神経伝達物質として作用する
ドーパミンを遊離させるドーパミン遊離促進剤を提供す
ることにある。
DISCLOSURE OF THE INVENTION An object of the present invention is to provide a dopamine release promoter which releases dopamine which is produced in dopaminergic neurons and which acts as a neurotransmitter, which is useful as a therapeutic drug for Parkinson's disease. It is in.

【0007】[0007]

【課題を解決するための手段】本発明によれば、Tyr Pr
o Val Proで示されるテトラペプチド及び/又はTyr Pro
Val Proに薬理学的に許容される塩が結合したテトラペ
プチド化合物を有効成分として含有するドーパミン遊離
促進剤が提供される。
According to the present invention, Tyr Pr
o Tetrapeptide represented by Val Pro and / or Tyr Pro
There is provided a dopamine release promoter comprising, as an active ingredient, a tetrapeptide compound in which a pharmacologically acceptable salt is bound to Val Pro.

【0008】以下本発明を更に詳細に説明する。本発明
において有効成分として用いるテトラペプチドは、Tyr
Pro Val Proであって、更にTyr Pro Val Proに薬理学的
に許容される塩が結合したテトラペプチド化合物を用い
ることもできる。該薬理学的に許容される塩としては、
ナトリウム塩、カルシウム塩、カリウム塩、マグネシウ
ム塩等の金属塩;塩酸塩、硫酸塩、燐酸塩等の無機酸付
加塩;酢酸塩、プロピオン酸塩、クエン酸塩、酒石酸
塩、リンゴ酸塩、蓚酸塩、メタンスルホン酸塩等の有機
酸付加塩;アンモニウム塩、アルギニン塩等の塩基性化
合物との塩等が挙げられる。
Hereinafter, the present invention will be described in more detail. The tetrapeptide used as an active ingredient in the present invention is Tyr
Pro Val Pro, and a tetrapeptide compound in which a pharmacologically acceptable salt is further bound to Tyr Pro Val Pro can also be used. As the pharmacologically acceptable salt,
Metal salts such as sodium salt, calcium salt, potassium salt and magnesium salt; inorganic acid addition salts such as hydrochloride, sulfate and phosphate; acetate, propionate, citrate, tartrate, malate and oxalic acid Salts; organic acid addition salts such as salts and methanesulfonates; and salts with basic compounds such as ammonium salts and arginine salts.

【0009】前記テトラペプチドを調製するには、ペプ
チド合成に通常用いる公知の方法により得ることがで
き、液相合成法、固相合成法の何れでも良い。具体的に
は例えば、ペプチド結合の任意の位置で二分される二種
のフラグメントの一方に相当する反応性カルボキシル基
を有する原料と、他方のフラグメントに相当する反応性
アミノ酸基を有する原料をペプチド合成の常套手段で縮
合させて、ペプチドを延長させる。次いで生成物のC末
端α−カルボキシル基及びN−末端α−アミノ基の保護
基を同時に又は段階的に除去する。またアミノ酸に保護
基が付いている場合には、その保護基を脱離することに
より製造し得る。原料の反応に関与すべきでない官能基
の保護及び保護基、並びにその保護基の脱離、反応に関
与する官能基の活性化等も、また公知の手段から適宜選
択することができる。
The tetrapeptide can be prepared by a known method usually used for peptide synthesis, and may be any of a liquid phase synthesis method and a solid phase synthesis method. Specifically, for example, a raw material having a reactive carboxyl group corresponding to one of two types of fragments bisected at an arbitrary position of a peptide bond and a raw material having a reactive amino acid group corresponding to the other fragment are synthesized by peptide synthesis. To extend the peptide. The protecting groups for the C-terminal α-carboxyl group and the N-terminal α-amino group of the product are then removed simultaneously or stepwise. When an amino acid has a protecting group, it can be produced by removing the protecting group. Protection and protection of functional groups that should not participate in the reaction of the raw materials, elimination of the protective groups, activation of functional groups involved in the reaction, and the like can also be appropriately selected from known means.

【0010】前記ペプチド結合を行なう際の反応温度
は、ペプチド結合形成反応に使用されうることが知られ
ている範囲から適宜選択される。即ち通常は約−20℃
〜30℃の範囲から適宜選択することができる。
[0010] The reaction temperature at which the peptide bond is formed is appropriately selected from a range known to be usable for a peptide bond formation reaction. That is, usually about −20 ° C.
It can be appropriately selected from the range of ~ 30 ° C.

【0011】このようにして製造されたテトラペプチド
の精製は、反応終了後にペプチドの分離精製に通常用い
られる手段、例えば抽出、分配、再沈澱、再結晶、カラ
ムクロマトグラフィー等によって精製することができ
る。
[0011] The tetrapeptide thus produced can be purified after completion of the reaction by a means usually used for separation and purification of the peptide, for example, extraction, distribution, reprecipitation, recrystallization, column chromatography and the like. .

【0012】前記テトラペプチド又は薬理学的に許容さ
れる塩が結合したテトラペプチド化合物は、例えば通常
100℃前後の加熱においても安定であって、物質とし
て安定であるので、生理食塩水溶液中に保存することが
できる他、マンニトール、ソルビトール等を添加して凍
結乾燥アンプルとして製剤化し、ドーパミン遊離促進剤
として使用する際に溶解することもできる。
The tetrapeptide or the tetrapeptide compound to which a pharmacologically acceptable salt is bound is stable, for example, usually even when heated to about 100 ° C., and is stable as a substance. Alternatively, mannitol, sorbitol, etc. may be added to formulate a lyophilized ampoule and dissolved when used as a dopamine release promoter.

【0013】本発明のドーパミン遊離促進剤は、前記テ
トラペプチド遊離体、塩基塩又は酸付加塩等としての薬
理学的に許容される塩が結合したものとして投与するこ
とができ、その投与形態は、主として非経口的、例えば
静脈注射、皮下注射、脳室内投与あるいは脊髄内投与等
によって行なうことができる。
The dopamine release promoter of the present invention can be administered as a combination of the above-mentioned tetrapeptide free form, a pharmacologically acceptable salt such as a base salt or an acid addition salt. It can be performed mainly parenterally, for example, by intravenous injection, subcutaneous injection, intraventricular administration or intraspinal administration.

【0014】本発明のドーパミン遊離促進剤の有効投与
量は、前記テトラペプチド遊離体の量に換算して、一般
に体重1Kg当たり1mg〜100mgの範囲が適当で
ある。更に詳述すれば、投与量は対象疾患、症状、投与
方法等により適宜選択することができ、例えばパーキン
ソン病等の神経症患者に対して投与する場合には、1回
投与量として、1mg/kg〜100mg/kg体重程
度を、1〜3回/日程度投与するのが適当である。
The effective dose of the dopamine release promoting agent of the present invention is generally in the range of 1 mg to 100 mg per 1 kg of body weight in terms of the amount of the above-mentioned tetrapeptide free form. More specifically, the dose can be appropriately selected depending on the target disease, symptoms, administration method, and the like. For example, when administered to a neurotic patient such as Parkinson's disease, a single dose is 1 mg / mg. It is appropriate to administer about kg to 100 mg / kg body weight about 1 to 3 times / day.

【0015】本発明のドーパミン遊離促進剤の非毒性を
確認するために、該促進剤10mgを生理食塩水に溶解
し、BALB/Cマウス(雄、n=5、10週齢、体重25g)
の尾静脈より投与した。その結果24時間経過後もマウ
スには何の変化も認められず、1か月飼育後も正常であ
った。従って本発明のドーパミン遊離促進剤には毒性は
みられない。
To confirm the nontoxicity of the dopamine release promoter of the present invention, 10 mg of the promoter was dissolved in physiological saline, and BALB / C mice (male, n = 5, 10 weeks old, body weight 25 g)
Was administered through the tail vein. As a result, no change was observed in the mouse even after 24 hours, and the mouse was normal after one month of rearing. Therefore, the dopamine release promoter of the present invention has no toxicity.

【0016】[0016]

【発明の効果】本発明のドーパミン遊離促進剤は、副作
用が少なく、高い安定性及び安全性を兼ね備え、有効に
ドーパミンの遊離を促進させることができるので、非経
口的投与方法によりパーキンソン病等の神経症治療薬と
して有用である。
The dopamine release promoter of the present invention has few side effects, has high stability and safety, and can effectively promote dopamine release. Useful as a therapeutic agent for neurosis.

【0017】[0017]

【実施例】以下実施例により更に詳細に説明するが、本
発明はこれらに限定されるものではない。
The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

【0018】[0018]

【合成例1】Tyr Pro Val Proの合成及び精製 Boc Pro O-ポリスチレン-1%ジビニルベンゼンコポリマ
ー0.5mmol(Bocはターシャリーブチルオキシカルボ
ニルを示す)を出発材料としてBoc法に従い、以下の方
法によりペプチド鎖の延長を行なった。
[Synthesis Example 1] Synthesis and purification of Tyr Pro Val Pro Boc Pro O-polystyrene-1% divinylbenzene copolymer 0.5 mmol (Boc indicates tert-butyloxycarbonyl) as a starting material according to the Boc method and the following method Extension of the peptide chain was performed.

【0019】反応器に出発原料であるBoc Pro樹脂を入
れ、酢酸30mlで前記樹脂を3回洗浄した後、1N塩
酸/氷酢酸溶液を30ml加え、30分間振盪してBoc
基を除去した。続いて酢酸、エタノール、N,N−ジメ
チルホルムアミド(DMF)にて、それぞれ30mlで
3回づつ樹脂を洗浄した。次に10%トリエチルアミン
/DMF溶液を30ml加え10分間中和反応した後に
DMF及び塩化メチレンで洗浄した。次いで4mmol
のBoc Val/塩化メチレン溶液20mlを加え、振盪に
より樹脂内に十分浸透させた。10分後に4mmol
N,N−ジクロロヘキシルカルボジイミド(DCC)/
塩化メチレン溶液を2ml加え、2時間振盪しカップリ
ング反応を行なった。塩化メチレン及びエタノール30
mlで洗浄し過剰の未反応物及び不純物を除いた。以上
の操作でProに1個のアミノ酸(Val)を結合させた。続い
て以上の操作に準じて、Boc Valの代わりにBoc Pro、Boc
Tyr(BrZ)(BrZは2-ブロモベンジルカルボニルを示す)
を用いてペプチド鎖を延長した。以上の操作によって、
Tyr(BrZ) Pro Val Pro樹脂が合成された。得られた樹脂
を1Nトリエチルアミン/エタノール溶液50mlに懸
濁させ、室温で17時間撹拌混合させた。濾液と洗液を
集め減圧濃縮してTyr(BrZ) Pro Val Proの結晶を得た。
結晶を0.1N NaOH20mlで処理することによ
りTyrの保護基BrZを除去した。中和後石油エーテルを加
え再結晶させ、これを濾紙上で石油エーテルにより洗浄
した後、風乾して40mgの結晶を得た(収率17
%)。得られた生成物を0.1%トリフルオロ酢酸(T
FA)溶液に溶解し、分取ODSカラム(商品名「YM
C R−ODS−5」、40×300mm:山村化学社
製)を用いて再度精製し目的物のテトラペプチドの純品
36.5mgを得た。得られた目的物は、薄層クロマト
グラフィーにおいてワンスポットを示した。この際展開
溶媒は、n−ブタノール:酢酸:水=3:1:1、薄層
プレートは、商品名「シリカゲル60」(メルク社
製)、目的物のRfは0.4、精製物の性状は白色結晶
性粉末であった。また以下に示すアミノ酸分析及び質量
分析結果も合成が完了していることを示した。
A Boc Pro resin as a starting material is placed in a reactor, and the resin is washed three times with 30 ml of acetic acid. Then, 30 ml of a 1N hydrochloric acid / glacial acetic acid solution is added, and the mixture is shaken for 30 minutes to give Boc Pro resin.
The group was removed. Subsequently, the resin was washed three times with 30 ml each of acetic acid, ethanol, and N, N-dimethylformamide (DMF). Next, 30 ml of a 10% triethylamine / DMF solution was added and neutralized for 10 minutes, followed by washing with DMF and methylene chloride. Then 4 mmol
Of Boc Val / methylene chloride solution (20 ml) was added, and the mixture was sufficiently permeated into the resin by shaking. 4 mmol after 10 minutes
N, N-dichlorohexylcarbodiimide (DCC) /
2 ml of a methylene chloride solution was added, and the mixture was shaken for 2 hours to perform a coupling reaction. Methylene chloride and ethanol 30
Washed with ml to remove excess unreacted materials and impurities. One amino acid (Val) was bound to Pro by the above operation. Then, according to the above operation, Boc Pro, Boc instead of Boc Val
Tyr (BrZ) (BrZ represents 2-bromobenzylcarbonyl)
Was used to extend the peptide chain. By the above operation,
Tyr (BrZ) Pro Val Pro resin was synthesized. The obtained resin was suspended in 50 ml of a 1N triethylamine / ethanol solution and mixed by stirring at room temperature for 17 hours. The filtrate and washings were collected and concentrated under reduced pressure to obtain Tyr (BrZ) Pro Val Pro crystals.
The Tyr protecting group BrZ was removed by treating the crystals with 20 ml of 0.1 N NaOH. After neutralization, petroleum ether was added to recrystallize, washed with petroleum ether on filter paper, and air-dried to obtain 40 mg of crystals (yield 17).
%). The obtained product is treated with 0.1% trifluoroacetic acid (T
FA) solution and a preparative ODS column (trade name “YM
(CR-ODS-5), 40 × 300 mm: manufactured by Yamamura Chemical Co., Ltd.) to obtain 36.5 mg of a pure tetrapeptide product of interest. The obtained target showed one spot in thin layer chromatography. At this time, the developing solvent was n-butanol: acetic acid: water = 3: 1: 1, the thin layer plate was trade name “silica gel 60” (manufactured by Merck), the Rf of the target product was 0.4, and the properties of the purified product Was a white crystalline powder. The results of amino acid analysis and mass spectrometry shown below also indicated that the synthesis was completed.

【0020】目的物のアミノ酸分析を、6N塩酸により
150℃、1時間の条件で行なった結果、分析モル比は
プロリン:バリン:チロシンが2.01:1.00:
1.00であった。また質量分析(FABMS)の結果は、
(M+H+)=457であった。この結果得られた目的物
は、Tyr-Pro-Val-Proであることが判った。
The amino acid analysis of the target product was carried out using 6N hydrochloric acid at 150 ° C. for 1 hour. The analysis molar ratio was 2.01: 1.00 for proline: valine: tyrosine.
1.00. The result of mass spectrometry (FABMS)
(M + H +) = 457. The resulting target was found to be Tyr-Pro-Val-Pro.

【0021】[0021]

【実施例1】脳微小透析(ブレイン・マイクロダイアリシス)法によ
る投与 この実施例は、Ungerstedt,U.及びHallstrom,A.の方法
(Life Sci.,41,861-864(1987))に準じて以下のとおり
行なった。
Example 1 Brain microdialysis (brain microdialysis) method
This example administration that is, Ungerstedt, U. And Hallstrom, A. Method (Life Sci., 41, 861-864 (1987)) was performed as follows in accordance with.

【0022】8週齢のウイスター系ラット(体重290
g前後)の腹腔内に、ペントバルビタールを投与(約
3.5mg/100g体重)して麻酔した。次いでラッ
ト頭部の毛を刈った後、頭部を固定して頭皮を1.5〜
2cm切開し、頭蓋骨を露出させ完全に止血を確認した
後、PaxionsとWatsonのマップ(PaxionsとWatson,C.,ed
s.:The Rat Brain in StereotaxicCoodinates,Second E
di.(1986),Academic Press.Inc.)に従い、線条体にガイ
ドカニューレ(商品名「G−8」(株)エイコム製)を
埋め込み、デンタルセメントを用いて頭蓋骨に固定し
た。手術後数時間から数日間ラットの回復を待った。次
にマイクロインジェクションプローブ付き透析プローブ
(商品名「MI-BDP-I-803K」(株)エイコム製)をガイ
ドカニューレに沿って差し込み、リンガー液をシリンジ
ポンプ(商品名「EP-60」(株)エイコム製)にて流速
2μl/分で還流させた。合成例1で調製したテトラペ
プチド、並びに対照化合物としてのVal Pro Tyr Pro(VP
YP)、Tyr Pro Tyr Pro(YPYP)、Ile Pro Pro(IPP)、Val
Pro Pro(VPP)をそれぞれサンプルとして、マイクロイン
ジェクションプローブにて脳内に直接投与(100pm
ol/10μlリンガー液)した。還流後の液は、オー
トインジェクター(商品名「AS−10」(株)エイコ
ム製)のループに集め、20分毎に高速液体クロマトグ
ラフィー(HPLC)に送り、分離後、電気化学検出器
(商品名「CB−100」(株)エイコム製)でカテコ
ール類を検出した。結果を表1に示す。
Eight-week-old Wistar rats (weighing 290)
(approximately 3.5 g / 100 g body weight). Then, after shaving the rat head, the head was fixed and the scalp was 1.5 ~
After making a 2 cm incision, exposing the skull and confirming complete hemostasis, a map of Paxions and Watson (Paxions and Watson, C., ed)
s.:The Rat Brain in StereotaxicCoodinates, Second E
According to di. (1986), Academic Press. Inc.), a guide cannula (trade name “G-8” manufactured by Acom Co., Ltd.) was embedded in the striatum, and fixed to the skull using dental cement. The rats were allowed to recover for several hours to several days after surgery. Next, a dialysis probe with a microinjection probe (trade name "MI-BDP-I-803K" manufactured by Acom) is inserted along the guide cannula, and the Ringer's solution is syringe-pumped (trade name "EP-60" Co., Ltd.). (Manufactured by Acom) at a flow rate of 2 μl / min. The tetrapeptide prepared in Synthesis Example 1 and Val Pro Tyr Pro (VP
YP), Tyr Pro Tyr Pro (YPYP), Ile Pro Pro (IPP), Val
Pro Pro (VPP) as each sample, directly administered into the brain with a microinjection probe (100 pm
ol / 10 μl Ringer's solution). The liquid after reflux is collected in a loop of an auto-injector (trade name "AS-10" manufactured by Acom Co., Ltd.), sent to high performance liquid chromatography (HPLC) every 20 minutes, separated, and subjected to an electrochemical detector (product). Catechols were detected under the name “CB-100” (manufactured by Acom). Table 1 shows the results.

【0023】前記HPLCの分析条件は、ポンプ:「L
−4000W」(柳本製作所製)、 検出器:電気化学検出器(商品名「CB−10」(株)
エイコム製)、 Reference Electrode Ag/AgCl(商品名「WE−3G」
(株)エイコム製)、 カラム:ODS(商品名「Eicompak MA-5 ODS」(株)
エイコム製)、 移動相:0.1Mクエン酸緩衝液(pH3.9)(12
%メタノール、160mg/L、1−オクタンスルホン
酸ナトリウム、20mM EDTA・2Na(EDTA
はエチレンジアミンテトラ四酢酸を示す)を含む)で行
なった。
The HPLC analysis conditions are as follows:
-4000W "(manufactured by Yanagimoto Seisakusho), detector: electrochemical detector (trade name" CB-10 ")
Acom), Reference Electrode Ag / AgCl (trade name "WE-3G")
Column: ODS (trade name “Eicompak MA-5 ODS”)
Acom), mobile phase: 0.1 M citrate buffer (pH 3.9) (12
% Methanol, 160 mg / L, sodium 1-octanesulfonate, 20 mM EDTA · 2Na (EDTA
Represents ethylenediaminetetratetraacetic acid).

【0024】[0024]

【表1】 [Table 1]

【0025】[0025]

【実施例2】合成例1で調製したTyr Pro Val Pro 3μ
molを含むリンガー液を、実施例1と同様に、頭部に
プローブを埋め込んだ8週齢のウイスター系ラット(体
重250g前後)に、尾静脈から投与した。投与後一定
期間おきにプローブ内のドーパミン濃度を実施例1と同
様にHPLCで定量した。その結果を図1に示す。図1
の結果より本発明のペプチド投与区は、対照区(リンガ
ー液)に比べて60分後の脳内ドーパミン量を1.3倍
に高めたことが判る。
Example 2 Tyr Pro Val Pro 3μ prepared in Synthesis Example 1
In the same manner as in Example 1, a Ringer solution containing mol was administered to an 8-week-old Wistar rat (with a body weight of around 250 g) having a probe embedded in the head via the tail vein. The dopamine concentration in the probe was quantified by HPLC as in Example 1 at regular intervals after administration. The result is shown in FIG. FIG.
From the results, it can be seen that the peptide-administered group of the present invention increased the amount of dopamine in the brain 60 minutes later by 1.3 times as compared with the control group (Linger's solution).

【0026】[0026]

【配列表】[Sequence list]

配列番号:1 配列の長さ:4 配列の型:アミノ酸 トポロジー:直鎖状 配列の種類:ペプチド SEQ ID NO: 1 Sequence length: 4 Sequence type: Amino acid topology: Type of linear sequence: Peptide

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

【図1】図1は、実施例2における、対照区とテトラペ
プチド投与区の経時的な脳内ドーパミン濃度の変化を示
すチャートである。
FIG. 1 is a chart showing changes in brain dopamine concentration over time in a control section and a tetrapeptide administration section in Example 2.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平5−170668(JP,A) Brain Research,1989 年,Vol.490, No.1,p.196 −9 (58)調査した分野(Int.Cl.7,DB名) A61K 38/04 - 38/15 A61P 25/16 C07K 5/107 CA(STN)──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-5-170668 (JP, A) Brain Research, 1989, Vol. 490, no. 1, p. 196-9 (58) Field surveyed (Int. Cl. 7 , DB name) A61K 38/04-38/15 A61P 25/16 C07K 5/107 CA (STN)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 Tyr Pro Val Proで示されるテトラペプ
チド及び/又はTyr Pro Val Proに薬理学的に許容され
る塩が結合したテトラペプチド化合物を有効成分として
含有するドーパミン遊離促進剤。
1. A dopamine release promoter comprising, as an active ingredient, a tetrapeptide represented by Tyr Pro Val Pro and / or a tetrapeptide compound obtained by binding a pharmacologically acceptable salt to Tyr Pro Val Pro.
JP16005294A 1994-07-12 1994-07-12 Dopamine release promoter Expired - Fee Related JP3538453B2 (en)

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Application Number Priority Date Filing Date Title
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Publications (2)

Publication Number Publication Date
JPH0827022A JPH0827022A (en) 1996-01-30
JP3538453B2 true JP3538453B2 (en) 2004-06-14

Family

ID=15706877

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3538453B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000229854A (en) * 1999-02-15 2000-08-22 Ito En Ltd Intracerebral administering agent for treatment and prophylaxis of ischemic neurocyte apoptosis, intracerebral administering agent for treatment and prophylaxis of vascular dementia and administering agent in intracerebral surgery
JP2005315335A (en) 2004-04-28 2005-11-10 Nippon Pop Rivets & Fasteners Ltd Clip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Brain Research,1989年,Vol.490, No.1,p.196−9

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