JPH07188023A - Vascularization inhibitor - Google Patents

Abstract

PURPOSE:To obtain a vascularization inhibitor useful for treating rheumatic arthritis, diabetic retinopathy, pronaties retinopathy, senile macular degeneration, etc., comprising a specific uracil derivative or its pharmaceutically permissible salt as an effective component. CONSTITUTION:This vascularization inhibitor comprises a uracil derivative expressed by the formula (R<1> is H or a lower alkyl; R<2> is H, a lower alkyl, Cl, Br, I or nitro; R<3> is a lower alkyl or an amino which may be substituted by an lower alkyl) or its pharmaceutically permissible salt as an effective component. Especially, 6-amino-5-chlorouracil, 6-amino-5-bromouracil, 6-amino-5- ioduracil, 6-aminouracil, 6-methylaminouracil, 6-dimethylaminouracil, etc., are cited as compounds of the formula. The compound of the formula is a vascularization inhibitor useful for preventing and treating various diseases caused by abnormal growth of blood vessels such as neovascularization glaucoma, over scar formation in healing an incised wound or metastasis of various tumors, etc.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an angiogenesis inhibitor containing a uracil derivative or a pharmaceutically acceptable salt thereof as an active ingredient.

[0002]

BACKGROUND OF THE INVENTION Uracil derivatives and related compounds are
It is known as a compound having an antitumor action, an antifungal action, an antiviral action, etc. [for example, "chemotherapy area" vol. 3, No. 10, 53-58, (198
7) etc.]. However, it has not yet been known that the uracil derivative or its related compound has an angiogenesis inhibitory action.

[0003]

DISCLOSURE OF THE INVENTION The object of the present invention is to form rheumatoid arthritis, diabetic retinopathy, retinopathy of prematurity, senile macular degeneration, angiogenic glaucoma, excessive scar formation during wound healing. To provide an angiogenesis inhibitor containing, as an active ingredient, a uracil derivative or a pharmaceutically acceptable salt thereof useful for the prevention or treatment of various diseases caused by abnormal growth of blood vessels such as metastasis of various tumors. It is in.

[0004]

The present inventors have investigated the pharmacological actions of uracil derivatives from various points of view, and as a result, these compounds have angiogenesis-inhibiting action and are caused by various abnormal growth of blood vessels. They have found that they are effective in preventing or treating diseases, and have completed the present invention.

That is, the present invention provides the following general formula (1);

[0006]

[Chemical 2]

(In the formula, R ¹ represents a hydrogen atom or a lower alkyl group, R ² represents a hydrogen atom, a lower alkyl group, a chlorine atom, a bromine atom, an iodine atom or a nitro group, and R ³ represents a hydrogen atom or a lower atom. The present invention provides an angiogenesis inhibitor comprising a uracil derivative represented by (which represents an amino group which may be substituted with an alkyl group or a lower alkyl group) or a pharmaceutically acceptable salt thereof as an active ingredient.

In the present invention, in the general formula (1), R ¹ ,
Examples of the lower alkyl group represented by R ² and R ³ include a methyl group, an ethyl group, a propyl group, an isopropyl group,
Examples thereof include a linear or branched alkyl group having 1 to 4 carbon atoms such as a butyl group, an isobutyl group, a s-butyl group and a t-butyl group, and a methyl group, an ethyl group and a propyl group are particularly preferable.

In the general formula (1), the amino group which may be substituted with a lower alkyl group represented by R ³ is, for example, a methylamino group, an ethylamino group, a propylamino group, a butylamino group or a dimethylamino group. , A diethylamino group, a dibutylamino group, an ethyl group such as an ethylmethylamino group, and an amino group in which 1 or 2 alkyl groups having 1 to 4 carbon atoms are substituted, and particularly, a methylamino group, an ethylamino group, a dimethylamino group, The diethylamino group is preferred.

A uracil derivative represented by the general formula (1)
Then R¹Represents a hydrogen atom, R ²Is hydrogen atom, chlorine
An atom, a bromine atom or an iodine atom, R³Is lower grade
Those showing an amino group which may be substituted with a kill group; R
¹Represents a hydrogen atom or a lower alkyl group, and R²Is lower
Represents a rukyl group or a nitro group, R³Is a lower alkyl group
Preferred are: R¹Represents a hydrogen atom, R²
Represents a hydrogen atom, a chlorine atom, a bromine atom or an iodine atom.
And R³Represents an amino group; R¹Is a hydrogen atom or
Represents a chill group, R²Represents a methyl group or a nitro group, and R
³Is preferably a methyl group.

Examples of the uracil derivative represented by the general formula (1) include 6-amino-5-chlorouracil (compound 1), 6-amino-5-bromouracil (compound 2) and 6-amino-. 5-iodouracil (compound 3), 6-aminouracil (compound 4), 6-methylaminouracil (compound 5), 6-dimethylaminouracil (compound 6), 5-nitro-6-methyluracil (compound 7) , 5-nitro-1,6-dimethyluracil (compound 8), 1,5,6-trimethyluracil (compound 9) and the like.

The pharmaceutically acceptable salts of uracil derivatives include salts with inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid, formic acid, acetic acid, citric acid, succinic acid, tartaric acid, malic acid, propionic acid, maleic acid, Mention may be made of salts with organic acids such as fumaric acid.

The uracil derivative represented by the general formula (1) is a known compound, for example, Japanese Patent Publication No. Sho 49-1139.
No. 0, US Pat. No. 2,731,465, US Pat. No. 2,804,459, Journal of Chemical Society C (J. Chem. Soc., C), 18 , 247.
(1976), Biochemical Pharmacology (Bi
ochem.Pharmacol.), 16 (a) , 1833 (196 )
7), DE 2831037, Chemie Ber., 92 , 583-594 (19).
59), Journal of Medicinal Chemistry (J. Med. Chem.), 11 (4) , 639-.
644 (1968), Journal of American
Chemical Society (J. Am. Chem. So
c. ), 46 , 702-708 (1924), Journal of Heterocyclic Chemistry (J. Hete).
rocycli.Chem.), 25, 985-990 (198)
8), Roczny Chemie, 45 (1) ,
Compounds described in 19-24 (1971) and the like or compounds synthesized according to the methods described therein can be used.

The dosage form of the angiogenesis inhibitor of the present invention is not particularly limited, and a known pharmaceutical carrier is used, and tablets, pills, powders, solutions, suspensions, emulsions, granules, capsules, suppositories are used. Injectables, ointments, patches, eye drops, nasal drops and the like can be made into a desired dosage form according to the therapeutic purpose. Further, the angiogenesis inhibitor of the present invention can be orally or parenterally administered to mammals including humans, depending on the dosage form.

Examples of known pharmaceutical carriers include diluents and excipients such as fillers, fillers, binders, disintegrants, surfactants, lubricants and the like, which are appropriately selected depending on the dosage form. It can be selected and used. For example, in the case of molding in the form of tablets (including sugar-coated tablets, gelatin-coated tablets, enteric-coated tablets, film-coated tablets, double tablets, multilayer tablets, etc.), lactose, sucrose, sodium chloride, glucose, urea, Excipients such as starch, calcium carbonate, kaolin, crystalline cellulose, silicic acid; water, ethanol, propanol, simple syrup, glucose solution, starch solution, gelatin solution, carbomethylcellulose, shellac, methylcellulose,
Binders such as potassium phosphate and polyvinylpyrrolidone;
Disintegrants of dry starch, sodium alginate, agar powder, laminaran powder, sodium hydrogen carbonate, calcium carbonate, polyoxyethylene sorbitan fatty acid esters, sodium lauryl sulfate, stearic acid monoglyceride, starch, lactose, etc .; sucrose, stearic acid, cocoa butter , Disintegration inhibitors such as hydrogenated oils; absorption promoters such as quaternary ammonium bases and sodium lauryl sulfate;
Moisturizers such as glycerin and starch; starch, lactose,
Adsorbents such as kaolin, bentonite and colloidal silicic acid; lubricants such as purified talc, stearate, boric acid powder and polyethylene glycol can be used.

When formed into a pill form, excipients such as glucose, lactose, starch, cocoa butter, hydrogenated vegetable oil, kaolin, talc and the like; binders such as gum arabic powder, tragacanth powder, gelatin and ethanol, Laminaran,
A disintegrant such as agar can be used. In the case of molding in the form of capsules, the above-mentioned pharmaceutical carrier is used and filled into hard gelatin capsules, soft capsules and the like by a conventional method. In the case of molding into a suppository, polyethylene glycol, cacao butter, esters of higher alcohols, gelatin, semisynthetic glyceride and the like can be used.

In the case of injectable form, liquids, emulsions and suspensions are used, but those which are sterilized and areotonic with blood are preferable. Further, in the case of an injection, as a diluent, water, lactic acid aqueous solution, ethanol, propylene glycol, ethoxylated isostearyl alcohol, polyoxylated isostearyl alcohol, polyoxyethylene sorbitan fatty acid ester or the like can be used. A sufficient amount of sodium chloride, glucose and glycerin for preparing an isotonic solution can be contained in the pharmaceutical preparation, and a solubilizing agent, a buffering agent, a soothing agent and the like can be added.

Ointment (paste, cream, gel, etc.)
In the case of molding into the above form, white petrolatum, paraffin, glycerin, cellulose derivative, polyethylene glycol, silicone, bentonite and the like can be used as a diluent. The angiogenesis inhibitor of the present invention, together with the above-mentioned formulation carrier, regardless of the dosage form, further a coloring agent,
Preservatives, flavors, flavors, sweeteners, other pharmaceuticals and the like can be added.

The method of administration depends on the dosage form and the like. For example, tablets, pills, powders, solutions, suspensions, emulsions, granules and capsules are orally administered, and suppositories are rectally administered and injections. Is administered alone or mixed with normal replenishers such as glucose and amino acids and administered intravenously, or alone, intraarterially, intramuscularly, intradermally, subcutaneously or intraperitoneally, and the ointment is applied to skin and oral mucosa. Administer.

The content of the uracil derivative represented by the general formula (1) or a pharmaceutically acceptable salt thereof in the angiogenesis inhibitor of the present invention varies depending on the dosage form and the like, but is usually 1 to 70% by weight. % Is preferred.

The dose of the angiogenesis inhibitor of the present invention is appropriately selected depending on the conditions of use, age and sex of the patient, etc., but it is usually the uracil derivative represented by the general formula (1) or the uracil derivative thereof. 0.1 as a pharmaceutically acceptable salt
1000 mg / kg / day, especially 0.5-600 mg / k
It is preferably g / day and can be administered once a day or in 2 to 4 divided doses.

[0022]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.

Example 1 (tablet) 6-amino-5-chlorouracil 40 mg, starch 10
0 mg, magnesium stearate 15 mg and lactose 45 mg
200 mg per tablet was produced by a conventional method using.

Example 2 (Granule) 6-amino-5-bromouracil 300 mg, lactose 290
Using 100 mg of corn starch, 400 mg of corn starch and 10 mg of hydroxypropylmethyl cellulose, a granule was produced by a conventional method.

Example 3 (capsule) 6-amino-5-iodouracil 100 mg, lactose 170
mg, crystalline cellulose 77 mg and magnesium stearate 3 mg were used to fill hard gelatin capsules by a conventional method to produce capsules.

Example 4 (Injection) Using 40 mg of 6-methylaminouracil and an appropriate amount of distilled water for injection, an injection of 5 ml per ampoule was produced by a conventional method.

Test Example 1 (Test for confirming angiogenesis inhibitory action) Compounds 1 to 9 described above as the compound represented by the formula (1)
And their anti-angiogenic activity was determined by the British Journal of Cancer (British Journal of Cancer).
Cancer), 66 , 367-372 (1992). First, a gelatin sponge (made by Upjohn) is used for about 5 × 10 ×
A male Balb was cut into 10 mm pieces, and 0.05 ml of a physiological saline solution containing 1% agarose containing 10 µg of basic fibroblast growth factor (bFGF) (Upstate Biotechnology) was injected into the center of the male Balb. / C mouse (6 to 7 weeks old) was subcutaneously transplanted to the back. From the next day,
Compounds 1 to 10 dissolved or suspended in distilled water,
10ml / 100g (per mouse body weight) once a day,
It was orally administered by an oral probe for 9 days. The mouse was sacrificed 14 days after the sponge transplantation, the transplanted sponge was carefully removed, and hemoglobin was extracted with 1 ml of 0.1N ammonia solution for 4 hours. 0.5 ml of this extraction solution was mixed with a solution of hemoglobin B kit (manufactured by Wako Pure Chemical Industries, Ltd.) and the absorbance at 540 nm was measured.

[0028]

[Equation 1]

The amount of hemoglobin and the angiogenesis inhibitory activity were determined from the above. The control group was a group in which only a sponge containing 1% agarose without bFGF was transplanted. The results are shown in Table 1.

[0030]

Table 1 Compound dose (mg / kg / day) Inhibitory activity (%) 1 300 31.8 150 18.5 2 300 32.0 150 15.5 3 300 28.1 150 12.5 4 300 20. 7 5 300 13.0 6 300 11.8 7 300 16.3 8 300 300 13.5 9 300 10.3

In these experiments, no deaths were observed in each compound-administered group, and no inhibition of body weight was observed as compared with the control group. In addition, no change in appearance was observed.

[0032]

INDUSTRIAL APPLICABILITY An angiogenesis inhibitor containing the uracil derivative represented by the general formula (1) or a pharmaceutically acceptable salt thereof of the present invention as an active ingredient has an excellent angiogenesis inhibitory effect of suppressing abnormal growth of blood vessels. have. Therefore, the angiogenesis inhibitor of the present invention, various diseases caused by abnormal growth of blood vessels, for example, rheumatoid arthritis, diabetic retinopathy, premature retinopathy, senile macular degeneration, angiogenic glaucoma, It is useful as a preventive or therapeutic drug for diseases such as excessive scar formation during wound healing or diseases such as metastasis of various tumors.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location A61K 31/505 ADU C07D 239/54

Claims (5)

[Claims] 1. The following general formula (1): (In the formula, R ¹ represents a hydrogen atom or a lower alkyl group, and R 1
² is a hydrogen atom, a lower alkyl group, a chlorine atom, a bromine atom,
A uracil derivative represented by an iodine atom or a nitro group and R ³ represents a lower alkyl group or an amino group which may be substituted with a lower alkyl group) or a pharmaceutically acceptable salt thereof as an active ingredient Angiogenesis inhibitor. 2. In the general formula (1), R ¹ represents a hydrogen atom, R ² represents a hydrogen atom, a chlorine atom, a bromine atom or an iodine atom, and R ³ may be substituted with a lower alkyl group. The angiogenesis inhibitor according to claim 1, which shows an amino group. 3. In the general formula (1), R ¹ represents a hydrogen atom, R ² represents a hydrogen atom, a chlorine atom, a bromine atom or an iodine atom, and R ³ represents an amino group. The described angiogenesis inhibitor. 4. In the general formula (1), R ¹ represents a hydrogen atom or a lower alkyl group, R ² represents a lower alkyl group or a nitro group, and R ³ represents a lower alkyl group. The described angiogenesis inhibitor. 5. In the general formula (1), R ¹ represents a hydrogen atom or a methyl group, R ² represents a methyl group or a nitro group, and R
^The angiogenesis inhibitor according to claim 1, wherein ³ represents a methyl group.