JPH1036263A - Corydaline derivative-containing synthesis inhibitor of protein belonging to hsp27 family - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject synthetic inhibitor capable of suppressing synthesis of heat shock protein and treating disease such as a cancer and a multiple sclerosis, comprising a specific corydaline derivative as an active ingredient. SOLUTION: This synthetic inhibitor comprises a corydaline derivative of formula I (R<1> to R<5> are each independently a 1-3C alkyl) as an active ingredient. A corydaline of formula II is preferable as the corydaline derivative. The corydaline derivative can be extracted from Corydalis Tuber by using water (e. g. cold water warm water or hot water) or an organic solvent. The inhibitor specifically suppresses synthesis of a protein belonging to a heat shock protein having 16 kilodalton to 40 kilodalton molecular weight and is effectively used for preventing and treating a cancer and a multiple sclerosis, etc., whose malignant alteration is related to the protein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a protein belonging to the group of heat shock proteins having a molecular weight of from 16 kilodaltons (kD) to 40 kD (hereinafter referred to as HSP27 family) containing a coridarin derivative as an active ingredient. It relates to a synthesis inhibitor. HSP2 according to the invention
The inhibitors of the synthesis of proteins belonging to the HSP27 family are considered to be involved in the onset, malignancy, or therapeutic disorders of the proteins belonging to the HSP27 family, particularly by inhibiting the in-tissue synthesis of the proteins belonging to the HSP27 family. The patient's physiological condition, such as a certain disease, for example, cancer, or multiple sclerosis, can be effectively improved and the disease can be effectively treated.

[0002]

2. Description of the Related Art Despite recent advances in chemotherapy, surgery, radiation therapy, and immunotherapy, cancer malignant transformation is still directly or indirectly involved in the cause of cancer death. Overcoming malignancy has become one of the major challenges in cancer treatment in the future. The malignancy of a cancer is determined by the proliferative, invasive, or metastatic nature of the cancer. Metastasis, which is one of the phenomena of malignant transformation, depends on the type of primary cancer and the organs that are apt to undergo metastasis differ. Cancer metastasis is a complex event that begins with the growth of the primary tumor, withdrawal of cancer cells from the primary focus and invasion / proliferation of surrounding tissues, tumor angiogenesis, invasion of cancer cells into nearby blood vessels, blood New tumor blood vessels are born, which is visible after the movement to the distant site by flow and adhesion / implantation to vascular endothelial cells, infiltration outside the blood vessel, and the initiation of proliferation at the distant site (metastasis). It consists of a complex reaction cascade leading to the formation of a metastatic focus. In general, cancers are classified into those with a high grade and those with a relatively low grade. However, no radical treatment has been established for highly aggressive cancers, and patients are most likely to eventually die.

[0003] Hyperthermia for cancer (hyperthermia;
Hyperthermia) is a method of selectively killing tumor cells by heating a cancer tissue to treat cancer, and has recently attracted attention. Cancer treatment with hyperthermia
Looking at the biological effects of heat, a cell-killing effect can be obtained with relatively mild heating of 41 to 45 ° C, and a synergistic effect can be obtained when used in combination with radiation or an anticancer agent. There are many advantages. Treatment of cancer by hyperthermia has been tried in almost all departments in the clinic. However, one of the problems of hyperthermia is thermal tolerance that is transiently induced after heating. That is, since the cancer cells become temporarily resistant to heat by the first heating, the cell killing effect by the next heating is reduced. The thermotolerance means that once a cell (or tissue) is heated sub-lethal once, the cell (or tissue) becomes transiently heat resistant to the next heating. Due to heat resistance, the current practice is that thermal treatment is performed in most facilities only once or twice a week.

[0004] In cancer chemotherapy, there are still solid cancers such as lung cancer and colon cancer which hardly respond to chemotherapy. Is a problem. 1
According to United States statistics of 988, 49% of cancers diagnosed in one year are intrinsically resistant to chemotherapy initially, and 47% were initially chemotherapy effective and the tumor regressed It is said to have acquired relapse resistance after relapse.
These facts indicate that one of the most important problems that hinders the effects of chemotherapy on cancer is resistance to cytotoxic drugs.

[0005] Also, multiple sclerosi
s, MS) is an inflammatory demyelinating disease that specifically impairs the central nervous white matter, and its pathogenesis has been demonstrated by the immune system to attack the myelin sheath that surrounds nerve fibers. Immune disease. Multiple sclerosis often repeats acute hatred / remission in the early stages, but then gradually progresses. Adrenocorticotropic hormone (ACTH) and corticosteroids are used to improve symptoms in the acute phase, and azathioprine and cyclophosphamide are used to prevent recurrence during remission and to prevent the development of chronic progressive symptoms. Immunosuppressive agents such as e.g. However, many of the drugs currently being administered to multiple sclerosis patients are not as effective as expected,
At present, it is difficult to say that it is not enough, as many side effects are seen with non-specific therapies. The development of more specific treatments for multiple sclerosis is expected.

On the other hand, heat shock proteins (heat shock proteins)
protein; also called HSP, stress protein)
A group of proteins expressed in cells by stimulating the cells with some stress, such as heat, heavy metals, drugs, amino acid analogs, or hypoxia (low oxygen concentration). Heat shock proteins are ubiquitous in nature and are produced by higher animals, including bacteria, yeast, plants, insects, and humans.

[0007] HSPs are of various types,
Due to the molecular weight, the HSP90 family (for example, 9
0 kD or 110 kD HSP, etc.), HSP70 family (eg, 70-73 kD HSP, etc.), HS
P60 family (eg, 57-68 kD HSP etc.), small molecule HSP family (eg, 20 kD, 2
5-28 kD or 47 kD HSP). In the present specification, an HSP having a specific molecular weight is indicated by an HSP and a number described immediately after the HSP. For example, an HSP having a molecular weight of 27 kD is referred to as “HSP27”. As described above, there are many types of HSPs, which differ not only in molecular weight but also in structure, function, or property. In addition to the response to stress, some of these proteins are constitutively synthesized and, under normal circumstances, regulate protein folding, unfolding, protein subunit assembly, and protein membrane trafficking. It has been shown to play an essential physiological role. These functions as heat shock proteins are called molecular chaperones.

[0008] The expression of proteins belonging to the HSP27 family is significantly correlated with lymph node metastasis, lymph and blood vessel invasion, and shorter survival in human breast cancer ("J. Natl. Cancer Inst."). 83 : 170-178, 1991). It has been reported that a protein belonging to the HSP27 family is also a negative prognostic factor in gastric cancer ("Br.J.
Surg. ", 78 : 334-336, 1991). It has been reported that the expression level of a protein belonging to the HSP27 family in primary cancer cells is positively correlated with cancer malignancy, particularly the recurrence rate of cancer (" Breast Cancer "). Res. Treat. ", 12 : 130,
1988; "Proc. Am. Assoc. Cancer Res.", 30 : 252, 19
89) By suppressing the expression of proteins belonging to the HSP27 family, malignant transformation of cancer can be prevented.

[0009] The hyperthermia, which is a problem in hyperthermia for cancer,
There are reports that proteins belonging to the P27 family are involved. When the human HSP27 gene was introduced into mouse or hamster cells and expressed, the number of heat-resistant cells surviving after heat shock was induced and increased depending on the amount of HSP27 protein ("J. Cell. Biol.", 109
: 7-15, 1989). Also, in Chinese hamster cells, a mutant strain that has become capable of constantly expressing HSP27 can acquire thermotolerance ("J. Cell. Physio").
l. ", 137 : 157, 1988) α-B crystallin is a protein which is induced by heat shock treatment and has a high homology in amino acid sequence with HSP27, and is one of the proteins belonging to the HSP27 family. Cells overexpressing -B crystallin also acquire resistance to heat stress ("J. Cell. Biol.", 125 : 1385-1393, 1994), which suppresses the expression of proteins belonging to the HSP27 family. This has shown the possibility of suppressing hyperthermia and enhancing the effect of hyperthermia on cancer, and has also been reported to correlate the expression of proteins belonging to the HSP27 family with drug resistance ("Breast Ca
ncer Res. Treat. ", 23 : 178, 1992;" Cancer Res. ", 5
1 : 5245-5252, 1991), by suppressing the expression of proteins belonging to the HSP27 family, it is also possible to suppress drug resistance and enhance the effect of chemotherapy.

The immunodominant antigen in multiple sclerosis is αα, a protein belonging to the HSP27 family.
-B crystallin ("N
Nature ", 375 : 739-740, 1995). The expression of α-B crystallin in nervous tissue of multiple sclerosis patients is stronger than that in non-diseased tissues and is very immunogenic. ("Nature", 375 : 798-801, 1995).
HSP27 is the autoantigen in multiple sclerosis
Α-B crystallin, which is one of the proteins belonging to the family, and shows that suppressing the expression of α-B crystallin in the myelin sheath leads to fundamental treatment of multiple sclerosis.

[0011]

SUMMARY OF THE INVENTION In view of the above circumstances, the present inventors effectively improve the physiological condition of a patient suffering from a disease such as cancer or multiple sclerosis, and effectively treat the disease. In order to develop a method capable of performing the above-mentioned methods, various studies have been made on compounds that exhibit a synthesis inhibitory effect on proteins belonging to the HSP27 family. As a result, the present inventors have surprisingly found that coridarin, a component of Engosaku, or a derivative thereof specifically suppresses the synthesis of a protein belonging to the HSP27 family in cells of a tissue exhibiting a pathological condition. That is, by administering the coridarin derivative, intracellular HSP27
They found that the synthesis of proteins belonging to the family was suppressed, and thus it was possible to treat diseases such as cancer and multiple sclerosis. The present invention is based on such findings, and an object of the present invention is to provide a synthesis inhibitor of a protein belonging to the HSP27 family, which can effectively treat diseases such as cancer and multiple sclerosis.

[0012]

Accordingly, the present invention provides a compound of formula (I):

Embedded image (Wherein, R ¹ , R ² , R ³ , R ⁴ , and R ⁵ are each independently an alkyl group having 1 to 3 carbon atoms). Heat shock proteins between 16 and 40 kilodaltons in molecular weight (ie HS
P27 family protein).

As used herein, the term "HSP27 family" refers to a molecule having a molecular weight of 16 kD to 40 kD, as described above.
Mean heat shock proteins. Examples of proteins belonging to the HSP27 family include mammalian HSP27 (ie, a heat shock protein having a molecular weight of 27 kD) [or HSP28 (ie, a heat shock protein having a molecular weight of 28 kD)] and avian HSP2
5 (ie, a heat shock protein with a molecular weight of 25 kD) or yeast HSP26 (ie, a molecular weight of 26 kD).
D heat shock protein). In general, the molecular weight of a protein is, for example,
Since some differences occur due to differences in molecular weight measurement methods, experimental conditions, and the like, some proteins belonging to the HSP27 family include HSP27 and HSP27 in mammals.
At present, it is not clear at present whether, even if the molecular weight notations are different, such as SP28, whether they are different proteins having different amino acid sequences, or whether they are the same proteins whose only apparent molecular weights differ only in appearance. Some are not included. The protein belonging to the HSP27 family is the most major heat shock protein in mammals among the heat shock proteins belonging to the small HSP family described above, and exhibits characteristics that are well conserved across species. However, proteins belonging to the HSP27 family are different from other heat shock proteins and have different molecular weights for each species, and have a molecular weight of 16 k
It is a very diverse protein with a D-40 kD. Α-B crystallin having a high amino acid sequence homology with HSP27 is also induced by heat shock treatment and is one of the proteins belonging to the HSP27 family.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The synthesis inhibitor of the present invention contains a coridarin derivative represented by the above formula (I) as an active ingredient. The alkyl group having 1 to 3 carbon atoms is, for example, a methyl group, an ethyl group, an n-propyl group, or an i-propyl group. In the compound represented by the formula (I), R ¹ , R ² ,
R ³ , R ⁴ and R ⁵ can be each independently the same or different alkyl groups having 1 to 3 carbon atoms. Coridarin derivatives represented by the formula (I) include:
Stereoisomers exist, and any pure stereoisomers or mixtures thereof can be used as the active ingredient of the synthesis inhibitors of the present invention.

[0015] Coridarin derivatives which can be used as an active ingredient in the synthesis inhibitor of the present invention include those represented by the formula (II):

Embedded image Corydaline represented by is preferred. Corydarin is contained in crude drugs such as Engosaku, for example. There is a stereoisomer in corydarin, and any pure stereoisomer of corydarin or a mixture thereof can be used as an active ingredient of the synthesis inhibitor of the present invention.

The coridarin derivative contained in the synthesis inhibitor of the present invention can be prepared by chemical synthesis or by extracting and purifying from a natural product. Alternatively, a commercially available product may be used. When a coridarin derivative used as an active ingredient in the synthesis inhibitor of the present invention is extracted from a natural product, for example, whole or a part of a plant containing a coridarin derivative (for example, whole plant, leaf, root,
The rhizome, stem, root bark, or flower) is used as it is, or is simply processed (for example, dried, cut, blanched, steam-heated, or powdered) (for example, a crude drug). The extraction conditions are not particularly limited as long as they are generally used for plant extraction. Examples of plants containing corydalin include, but are not limited to, Corydalis turtischaninobii Bessel Forma Yansuo W. Y. Chou et.
vii Besser forma yanhusuo
Y. H. Chou et C .; C. Hsu) or Pseudomonas sac (Corydalis ternata)
Nakai) and the like can be used.

In the present invention, when corydarin is extracted from a crude drug, it is not limited to this, but it is preferable to extract corydalin from, for example, Engosaku. Engosaku (Corydalis Tuber) is Corydalis Turtoshaninobii Bessel Holma Yanfusuo WY Chou et C.C.H. And their parts can be used alone or in any combination.

The extract of Engosac which can be used as an active ingredient in the synthesis inhibitor according to the present invention may contain the above-mentioned coridarin, and therefore, a crude extract of Engosac can be used. As a method for producing a red sorghum extract that can be used in the present invention, red sorghum can be obtained by extracting with water (for example, cold water, hot water, or hot water) or by extracting with an organic solvent. . Examples of the organic solvent include alcohols having 1 to 6 carbon atoms (for example, methyl alcohol,
Ethyl alcohol, n-propyl alcohol, isopropyl alcohol, or butyl alcohol), esters (for example, methyl acetate, ethyl acetate, propyl acetate,
Or butyl acetate), ketones (eg, acetone or methyl isobutyl ketone), ethers, petroleum ethers, n-hexane, cyclohexane, toluene, benzene, halogen derivatives of hydrocarbons (eg, carbon tetrachloride,
Dichloromethane or chloroform), pyridine,
Glycol (eg, propylene glycol or butylene glycol), polyethylene glycol, or acetonitrile can be used, and these organic solvents can be used alone or in an appropriate combination, mixed at a certain ratio, and further used in an anhydrous or water-containing state. be able to. Preferably, chloroform and / or ether are desirable. As a method of water extraction or organic solvent extraction, a method used for ordinary crude drug extraction can be used, for example,
(Dry) 1 part by weight of water and organic solvent 3
It is preferable to heat and reflux at a temperature not higher than the boiling point and to perform ultrasonic extraction or cold immersion at room temperature while stirring, using up to 300 parts by weight. The extraction process usually takes 5 minutes to 7 days,
The extraction is preferably performed for 10 minutes to 60 hours, and the extraction time can be shortened by adding auxiliary means such as stirring, if necessary.

After completion of the extraction step, a crude extract can be obtained by separating insolubles from the water or organic solvent extract by a suitable method such as filtration or centrifugation. In the case where coridarin extracted and fractionated from a natural product is used in the synthesis inhibitor of the present invention, the crude extract may be used without purification. In addition to the water extract or organic solvent extract by a conventional method, a purified extract obtained by further treating the above crude extract with various organic solvents or adsorbents is also used as an active ingredient of the synthesis inhibitor of the present invention. Can be. Engosac extract, including these crude extracts and purified extracts after various purification treatments, may be used as-extracted solution or an extract obtained by concentrating the solvent, or the solvent may be distilled off. Dried powder, further purified by crystallization, or a viscous substance may be used, and a diluent thereof may also be used. The extract of Engosaku thus obtained contains coridarin contained in Engosaku and at the same time contains impurities derived from the raw material Engosaku.

The synthetic inhibitor according to the present invention comprises a coridarin derivative or an extract of a plant containing a coridarin derivative, for example, an extract of a crude drug containing a coridarin derivative (particularly, an extract of coralline), alone. Alternatively, it can be administered to an animal, preferably a mammal (particularly a human), preferably together with a conventional carrier which is pharmaceutically or veterinarily acceptable. The dosage form is not particularly limited. For example, oral preparations such as powders, fine granules, granules, tablets, capsules, suspensions, emulsions, syrups, extracts, or pills, or injections And parenteral agents such as topical solutions, topical solutions, ointments, suppositories, creams for topical administration, and eye drops. These oral preparations include, for example, gelatin, sodium alginate, starch, corn starch, sucrose, lactose, glucose, mannitol, carboxymethylcellulose, dextrin, polyvinylpyrrolidone, crystalline cellulose, soy lecithin, sucrose, fatty acid esters, talc, stearic acid. Magnesium, polyethylene glycol, magnesium silicate,
Excipients such as anhydrous silicic acid or synthetic aluminum silicate, binders, disintegrants, surfactants, lubricants, glidants, diluents, preservatives, colorants, flavors, flavors, stabilization It can be manufactured according to a conventional method using an agent, a humectant, a preservative, an antioxidant, or the like. For example, Coridalin 1
And capsules filled with a mixture of 99 parts by weight of lactose and 99 parts by weight of lactose.

Examples of parenteral administration methods include injection (subcutaneous, intravenous, etc.) and rectal administration. Of these, injections are most preferably used. For example, in the preparation of an injection, a coridarin derivative as an active ingredient,
Or, in addition to an extract of a plant containing a coridarin derivative, for example, an extract of a crude drug containing a coridarin derivative (particularly, an extract of engosac), for example, a water-soluble solvent such as physiological saline or Ringer's solution, vegetable oil or fatty acid A water-insoluble solvent such as an ester, a tonicity agent such as glucose or sodium chloride, a solubilizer, a stabilizer, a preservative, a suspending agent, or an emulsifier can be optionally used. Further, the synthetic inhibitor of the present invention may be administered using a sustained-release preparation technique using a sustained-release polymer or the like.
For example, the synthetic inhibitors of the present invention can be incorporated into a pellet of ethylene vinyl acetate polymer and the pellet can be surgically implanted into the tissue to be treated.

Although the synthesis inhibitor of the present invention is not limited to this, the coridarin derivative can be used in an amount of 0.01 to 99%.
%, Preferably 0.1 to 80% by weight. Further, the synthetic inhibitor of the present invention containing, as an active ingredient, an extract of a plant containing a coridarin derivative, for example, an extract of a crude drug containing a coridarin derivative (particularly, an engosac extract) is included therein. It can be prepared by appropriately adjusting the amount of the coridaline derivative so as to fall within the above range. When an extract of a plant containing a coridarin derivative, for example, an extract of a crude drug containing a coridarin derivative (particularly, an engosac extract) is used as a preparation for oral administration, a synthetic inhibitor is used. Is preferably formulated using a pharmaceutically acceptable carrier. The dose when using the synthetic inhibitor of the present invention depends on the type of disease, the age of the patient,
It depends on gender, body weight, degree of symptoms, administration method, etc., and is not particularly limited. Orally, the amount of coridarin derivative is usually 1 mg to 10 g per adult, divided into about 1 to 4 times a day, orally. Or it is administered parenterally. Furthermore, the use is not limited to pharmaceuticals, and various uses, for example, functional foods and health foods can be given in the form of food and drink.

[0023]

As described above, the coridarin derivative contained in the synthesis inhibitor of the present invention has an action of specifically inhibiting the synthesis of proteins belonging to the HSP27 family in cells. Specifically reduces the biosynthesis of proteins belonging to the HSP27 family. Accordingly, the coridarin derivative is, for example, effective in the prevention and treatment of cancer in which a protein belonging to the HSP27 family is associated with malignancy, and the effect of cancer hyperthermia associated with hyperthermia in which a protein belonging to the HSP27 family is an obstacle to the therapy. Or HSP2
Proteins belonging to 7 families can be used for the prevention and treatment of autoimmune diseases such as multiple sclerosis associated with the onset thereof. Moreover, since the expression and drug resistance proteins belonging to the HSP27 family are also reported to be correlated (, 23 "Breast Cancer Res Treat ..": 17
8, 1992; "Cancer Res.", 51 : 5245-5252, 1991), HS
By suppressing the expression of proteins belonging to the P27 family, it is possible to suppress drug resistance and enhance the effect of chemotherapy.

[0024]

EXAMPLES The present invention will be described below in more detail with reference to examples, but these examples do not limit the scope of the present invention. Example 1: Measurement of HSP expression level of human cultured cancer cells (1) Culture of human cultured cancer cells The following human cultured cancer cells were cultured at 37 ° C under 5% carbon dioxide conditions except for heat shock treatment. Cultured. Lung cancer cell line H69 (ATCC HTB 119), gastric cancer cell line KATO III (ATCC HTB 103), and prostate cancer cell line DU 145 (ATCC HTB 8).
1) RPMI164 containing 10% inactivated fetal bovine serum
0 medium.

(2) Coridarin treatment and heat shock treatment Two days after seeding, coridarin (Matsuura Pharmaceutical Co., Ltd.) represented by the above formula (II) was added to a final concentration of 20 μM in the culture medium of the various cultured human cancer cells. And cultured for 24 hours. Then, heat-shock at 45 ° C for 15 minutes,
Cultured overnight at 7 ° C. The control test was performed as described above, except that coridarin was not added.

(3) Measurement of HSP expression level in cultured human cancer cells The cells treated in the above (2) were homogenized by the following method, and the HSP expression level was measured by Western blotting. That is, the cells treated in the above (2) were treated with phosphate buffered saline [composition: KCl = 0.2 g /
1, KH ₂ PO ₄ = 0.2 g / l, NaCl = 8 g /
1, Na ₂ HPO ₄ (anhydrous) = 1.15 g / l;
PBS (-)), and then lysed buffer (lysis buffer) [1.0% NP-4
0, 0.15 M sodium chloride, 50 mM Tris-HC
1 (pH 8.0), 1 mM of 5 mM-EDTA, 2 mM-N-ethylmaleimide, 2 mM phenylmethylsulfonyl fluoride, 2 μg / ml leupeptin and 2 μg / ml pepstatin], and allowed to stand on ice for 20 minutes.
Thereafter, centrifugation was performed at 12,000 rpm at 4 ° C. for 20 minutes. 10 μl of the supernatant after centrifugation was added to PBS (−) 790
μl, add protein assay stain (Dye Reag
ent Concentrate: Bio-Rad, Catalog No. 500-00
06) 200 μl was added. After standing at room temperature for 5 minutes, the protein was quantified by measuring the absorbance at 595 nm.

Using the sample for which the protein was quantified, L
aemmli buffer system (Laemmli, NK, "Natur
e ", 283 : pp. 249-256, 1970), lysates containing equal amounts of protein were subjected to SDS polyacrylamide gel electrophoresis. After electrophoresis, blotting and subsequent blocking were performed. Using a transfer device (Trans-Blot Electrophoretic Transfer Cell: Bio-Rad, Catalog No. 170-3946), adhere the gel to a 0.45 μm nitrocellulose membrane (Schleicher & Schuell, Catalog No. 401196) at room temperature and 100 V at room temperature. A tris glycine buffer (Tris Gly Running and Bloom) containing 0.025 M Tris and 0.192 M glycine and adjusted to pH 8.5 was used as a blotting buffer.
tting Buffer; Enprotech, Massachusetts, USA
A buffer prepared by adding methyl alcohol to catalog number SA100034) to 20% was used. After blotting, the nitrocellulose membrane was added to a 10% skim milk (Snow Brand Milk Products) -PBS (-) solution at room temperature for 30 minutes.
Incubate to block non-specific binding.

After blocking, an anti-human HSP27 mouse monoclonal antibody (Stre
ssGen, Victoria, BC, Canada, Cat.No. SPA-8
00), a primary antibody reaction was performed. This anti-human HSP
The 27 mouse monoclonal antibody is a human breast cancer cell line MC
HSP2 isolated from F7 (ATCC HTB 22)
4 was used as an immunogen ("Cancer Res.",
42 , 4256-4258, 1982), HSP27 (human HSP2)
7, Chimpanzee HSP27 and sheep HSP27)
("Cancer Res.", 42 , 4256-4258, 1
982; "Cancer Res.", 43 , 4297-4301, 1983), HSP
Specifically reacts with HSP24 and HSP28. After the primary antibody reaction, the solution was exchanged with PBS (-) for 5 minutes each for 2 minutes.
Washing was performed by a slow rocking shaker, and further, washing was performed four times with a PBS (−)-0.1% Tween 20 (Bio-Rad, Cat. No. 170-6531) solution for 15 minutes, and the solution was replaced. Was. Finally,
Washing was performed twice for 5 minutes each with PBS (-).

After the washing was completed, a peroxidase-labeled goat anti-mouse IgG antibody (CAPPEL, Catalog No. 55550) was
% For 2 hours using 5 ml of an antibody solution prepared by diluting 5000-fold with a PBS (-) solution containing 5% skim milk.
A secondary antibody reaction was performed. After the completion of the reaction, the nitrocellulose membrane was washed twice with a PBS (-) solution for 5 minutes while changing the solution twice, and further with a PBS (-)-0.1% Tween20 solution for 15 minutes for 5 times. Performed by slow rocking shaker. Finally PBS (-)
The solution was washed twice for 5 minutes each. Extra PBS
(-) After removing the solution, the western blotting detection reagent (ACL Western blotting detection reagent; Ame
rsham, catalog number RPN2106), sprinkle onto the nitrocellulose membrane, incubate for 1 minute, remove excess detection reagent, wrap the nitrocellulose membrane in wrap, and cover the reaction surface with X-ray film (Kodak X-OMAT, AR, (Catalog No. 165 1454), exposed, developed and HSP2
7 was examined. Table 1 shows the results. In the table,
"↓" indicates HSP by coridarin treatment compared to control.
27 means that the expression level was reduced.

[0030]

[Table 1] Cancer type Cancer cell lung H69 ↓ Stomach KATO III ↓ Prostate DU 145 ↓

In the control test, that is, in the cells to which coridarin was not added, the lung cancer cell line H69 and the gastric cancer cell line KA
In TO III and the prostate cancer cell line DU145, one band having a molecular weight of about 27 kD was detected. The molecular weight was determined based on the binding to the anti-human HSP27 mouse monoclonal antibody and molecular weight markers (soybean trypsin inhibitor and bovine carbonic anhydrase). In cells to which corydarin has been added,
No band having a molecular weight of about 27 kD was detected in the lung cancer cell line H69 and the prostate cancer cell line DU145. In the gastric cancer cell line KATO III, the concentration of the band having a molecular weight of about 27 kD was significantly lower than that in the control test. That is, it can be concluded that coridarin has the activity of a synthetic inhibitor that suppresses the expression of HSP27.

[0032]

As described in detail above, coridarin derivatives have the activity of a synthetic inhibitor that suppresses the expression of proteins belonging to the HSP27 family in cells. Therefore,
By administering a coridarin derivative, for example, HS
A protein belonging to the P27 family effectively improves the physiological condition of a patient with an autoimmune disease such as cancer associated with malignant transformation or a decrease in the effect of hyperthermia, and multiple sclerosis associated with the onset thereof, thereby improving the disease. It can be treated effectively. In addition, there is a report that the expression of a protein belonging to the HSP27 family is correlated with drug resistance ("B
reast Cancer Res. Treat. ", 23 : 178, 1992;" Cancer R
es. ", 51 : 5245-5252, 1991), by suppressing the expression of proteins belonging to the HSP27 family, it is also possible to suppress drug resistance and enhance the effects of chemotherapy.

Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication location C07D 455/03 C07D 455/03

Claims (3)

[Claims] 1. A compound of formula (I): (Wherein, R ¹ , R ² , R ³ , R ⁴ , and R ⁵ are each independently an alkyl group having 1 to 3 carbon atoms). An inhibitor of synthesis of a heat shock protein having a molecular weight of from 16 to 40 kDa. 2. Formula (I): (Wherein R ¹ , R ² , R ³ , R ⁴ and R ⁵ are alkyl groups having 1 to 3 carbon atoms) as an active ingredient. An inhibitor of the synthesis of heat shock proteins having a molecular weight between 16 and 40 kilodaltons. 3. A heat shock protein synthesis inhibitor having a molecular weight of from 16 to 40 kDa, which comprises an extract of Engosaku as an active ingredient.