WO2009122580A1 - 抑肝散のバイオアッセイ方法 - Google Patents
抑肝散のバイオアッセイ方法 Download PDFInfo
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- WO2009122580A1 WO2009122580A1 PCT/JP2008/056684 JP2008056684W WO2009122580A1 WO 2009122580 A1 WO2009122580 A1 WO 2009122580A1 JP 2008056684 W JP2008056684 W JP 2008056684W WO 2009122580 A1 WO2009122580 A1 WO 2009122580A1
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- yokukansan
- cells
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- cell death
- glutamic acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5014—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing toxicity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5044—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics involving specific cell types
- G01N33/5058—Neurological cells
Definitions
- the present invention relates to an assay method for yokukansan, and more particularly, to an assay method capable of quantitatively evaluating the physiological activity value (pharmacological activity value) of yokukansan, which is a Chinese medicine preparation, using cultured nerve cells. .
- Cigarette is a medicinal product blended with herbal medicines, and not all active ingredients are specified.
- a single active ingredient does not exert its effect but acts in a complex manner, a measurement method that can be evaluated as a whole Chinese medicine is necessary to guarantee its quality.
- Patent Document 1 Patent Document 2.
- This measurement method includes a method for measuring individual components and comprehensively evaluating them, and a bioassay for evaluating physiological activity using biological materials.
- Bioassays include in vivo tests and in vitro tests, but the in vivo test systems have various limitations in terms of test facilities, test animals, and processing capacity. However, it was difficult to use for the quality evaluation of herbal medicine.
- Yokukansan a Kampo preparation
- Yokukansan a Kampo preparation
- an object of the present invention is to find a bioassay system based on an in vitro test that enables higher quality assurance for yokukansan.
- the present inventors have been diligently studying from the idea that there is a possibility of directly protecting the cell death caused by glutamic acid as an effect of yokukansan, which is generally used in research on cell death. It was confirmed that cell death was suppressed in a dose-dependent manner when cultured cells were cultured in the presence of glutamic acid to induce cell death and simultaneously add yokukansan. And if this knowledge was applied, it discovered that the bioassay method of the yokukansan with respect to the neuronal cell death could be constructed
- the present invention adds a sufficient amount of glutamic acid and yokukansan to induce cell death in a medium for culturing cells, and determines the pharmacology of yokukansan from the viability of the cultured cells in the medium. It is a bioassay method for yokukansan characterized by evaluating activity value.
- bioassay method of the present invention it is possible to easily and stably determine the physiological activity value (pharmacological activity value) of yokukansan by in vitro tests without any restrictions on test facilities, test animals, processing capacity, etc. is there.
- a sufficient amount of glutamic acid and yokukansan to induce cell death are added to a medium for culturing nervous system cultured cells, and the nervous system in the medium is added. This is to evaluate the pharmacological activity value of Yokukansan from the survival rate of cultured cells.
- known cells can be used as the allogeneic cultured cells, but it is preferable to use PC12 cells derived from rat adrenal brown cell types.
- This PC12 cell is generally used in a wide variety of studies on cell death, and its characteristic is that it responds to a neurotrophic factor (NGF).
- NGF neurotrophic factor
- the culture without NGF shows the trait of adrenal medulla chromaffin cells, but in the presence of NGF, long nerve fibers are stretched and differentiated into sympathetic ganglion cells. Its use is extremely wide, especially for molecular biological use, and it has recorded enormous usage.
- PC12 cells cause cell death by glutamic acid, but plant-derived components such as scutterralin, isoflavonoids, ( ⁇ )-epigallocatechin gallate, and the like suppress this cell death. This is known (Non-Patent Documents 1 to 3).
- PC12 cells used in the present invention are cultured in a RPMI1640 medium supplemented with 5% fetal bovine serum and 10% non-immobilized serum in a collagen-coated flask by culturing for a certain period, for example, 3 to 7 days. Can be produced.
- PC12 cells respond to neurotrophic factor (NGF), but PC12 cells cause cell death depending on the concentration of glutamate regardless of the presence or absence of NGF stimulation. Therefore, in practicing the present invention, the presence or absence of NGF stimulation on PC12 cells is not affected.
- NGF neurotrophic factor
- the glutamic acid concentration in the culture medium for culturing nervous system cultured cells be a concentration sufficient to induce cell death in these cultured cells.
- the pH in the medium tends to be acidic, and as a result, cell death due to changes in the culture environment is a concern. Therefore, cell death due to glutamic acid is induced at a lower concentration. It is necessary to select conditions that can be used.
- the best cell death induction conditions selected as a result of these are to use dialyzed serum as the medium, collagen-coated plate as the plate, and medium without adding phenol red.
- the implementation of the bioassay method of the present invention is not limited to these conditions.
- the concentration of glutamic acid in the medium for effectively inducing cell death is preferably 1 ⁇ M to 50 mM, more preferably 1 mM to 20 mM.
- One aspect of the evaluation method in the bioassay method of the present invention is to measure the cell death of PC12 cells in a medium supplemented with a sufficient amount of glutamic acid and a certain amount of yokukansan to induce cell death. Induction, the number of viable cells is measured by MTT assay, and the pharmacological activity value of Yokukansan is evaluated from these.
- Such an MTT assay is a method in which 3- (4,5-dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide (MTT) is a substrate for intracellular mitochondrial dehydrase, and has high viability. This is based on the fact that the amount of MTT that is reduced as much as possible, and the resulting yellow to red formazan amount corresponds well with the number of viable cells.
- This method is a method capable of measuring only living cells, and measures the light absorbance of a sample at a wavelength of 570 nm with a reference wavelength of 690 nm. Of course, other known methods may be used as long as the number of viable cells can be measured.
- this measurement in general, it is preferable to measure a plurality of samples containing yokukansan at a known concentration at the same time, preferably three or more points, and to quantify the pharmacological activity value of yokukansan in the test sample. If the conditions hardly change, measurement may be performed using a calibration curve already prepared with a sample containing a known concentration of yokukansan.
- the pharmacological activity value of yokukansan can be evaluated in cultured cells of the nervous system. This mechanism of action is directly based on the action of yokukansan. That is, according to the studies by the present inventors, it was found that yokukansan suppresses cell death of cultured cells of the nervous system induced by glutamic acid, and thereby, pharmacological activity of cell death suppression in yokukansan. It became possible to evaluate the price.
- the reference preparation and test preparation clinically pharmacologically effective as yokukansan are evaluated for pharmacological activity under the same conditions, and the reference preparation and test preparation are compared.
- the quality equivalence of the preparation can be evaluated.
- the pharmacological activity value of the test sample falls within the range of the upper and lower limits derived from the average and the like by evaluating the pharmacological activity value with the bioassay method of the present invention for a plurality of preparation lots
- the quality equivalence can also be evaluated.
- PC12 cell culture PC12 cells (source: Dainippon Sumitomo Pharma Co., Ltd.) were cultured as follows. That is, a 75 cm 2 culture area flask coated with collagen (collagen acidic solution IAC-15: manufactured by Koken Co., Ltd.) was used, and 500 mL of RPMI1640 medium (GIBCO 22400-089) was used as a growth medium. -An antibiotic-containing medium supplemented with a streptomycin solution (GIBCO 15070-063) further contained 5% fetal bovine serum (FBS; ICN 2916754) and 10% non-immobilized horse serum (HS; GIBCO 26050) Medium was added.
- FBS fetal bovine serum
- HS non-immobilized horse serum
- PC12 cells After thawing PC12 cells that had been cryopreserved, they were cultured in this growth medium for one week or more and used for experiments.
- the passage of PC12 cells was performed by a mechanical peeling method using a Pasteur pipette and a syringe.
- all cell cultures were performed in a CO 2 incubator under air containing 5% CO 2 at 37 ° C.
- Example 2 Induction of cell death by glutamate: Using the PC12 cells obtained in Example 1, culture conditions that efficiently cause cell death by glutamic acid were examined. They are as follows.
- the induction medium is an antibiotic-containing medium in which 5 mL of penicillin-streptomycin solution is added to 500 mL of RPMI 1640 medium (GIBCO 11835-030), in which 5% dialyzed fetal bovine serum (GIBCO 26400-044) and 10% Medium containing dialysis horse serum (Biowest S090D).
- PC12 cells were seeded in a 96-well plate coated with collagen at 5000 cells / well, cultured for 3 days in the induction medium from the day of seeding, and 1 to 20 mM of glutamic acid was added on day 2 of the seeding to induce cell death. .
- a measured value (% with respect to control) is based on the group without glutamic acid added.
- Cell viability (%) [(As-Abs) / (Ac-Abc)] ⁇ 100
- Ac is the absorbance of the negative control (well with cells, control medium and MTT solution)
- Abs is the blank absorbance of the sample (well containing test substance-supplemented medium and MTT solution)
- Abc is the blank absorbance of the negative control (well with control medium and MTT solution)
- TJ-54 Yokukansan (TJ-54; manufactured by Tsumura Corporation) (hereinafter referred to as “TJ-54”) was added.
- TJ-54 Yokukansan
- TJ-54 was shown to suppress cell death in a concentration range of 10 to 1,000 ⁇ g / ml. The result is shown in FIG.
- TJ-54 suppresses the decrease in MTT activity due to the addition of glutamic acid in a concentration-dependent manner.
- FIG. 5 concentration-dependent inhibitory effect of cell death when TJ-54 is added on the basis of cell death induced by 17.5 mM glutamic acid is used for the construction of a bioassay system for yokukansan. It became clear that it was possible (Fig. 6).
- FIG. 2 is a drawing showing the relationship between the amount of TJ-54 added and the cell viability in a medium with a glutamic acid concentration of 17.5 mM.
- Control means the cell viability without addition of glutamic acid.
- FIG. 5 is a calibration curve showing the TJ-54 concentration-dependent inhibitory effect on glutamate-induced cell death based on the cell death induced by 17.5 mM glutamate from the results of FIG.
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Abstract
Description
PC12細胞の培養:
PC12細胞(供給源:大日本住友製薬株式会社)の培養は、次のようにして行った。すなわち、コラーゲン(コラーゲン酸性溶液IAC-15:株式会社 高研製)をコーティングした培養面積75cm2のフラスコを用い、この中に、増殖培地として、500mLのRPMI1640培地(GIBCO 22400-089)に5mLのペニシリン-ストレプトマイシン溶液(GIBCO 15070-063)を添加した抗生物質含有培地に、更に5%のウシ胎児血清(FBS;ICN 2916754)と 10%の非動化ウマ血清(HS;GIBCO 26050)を含有させた培地を入れた。凍結保存したPC12細胞を解凍後、この増殖培地にて1週間以上培養し、実験に使用した。ここで、PC12細胞の継代は、パスツールピペット、シリンジを用いて機械的剥離法により行った。なお、以下の実施例も含み、すべての細胞培養は37℃で5%CO2を含む空気下のCO2インキュベーター内で行った。
グルタミン酸による細胞死誘発:
実施例1で得たPC12細胞を用い、グルタミン酸による細胞死を効率よく引き起こす培養条件を検討した。それらは、以下の通りである。
グルタミン酸細胞死に対する血清の影響を検討した。通常の血清(FBSおよびHS)と透析血清(排除限界10000ダルトンの限外ろ過膜で透析した血清)の比較において、グルタミン酸細胞死に対する血清の影響に顕著な差は認めらないが、透析血清で細胞死を誘発しやすい傾向が見られた。結果を図1に示す。
PC12細胞の培養容器への接着を効率よくする細胞基質を探索した。そして、コラーゲン、ポリ-L-リシン(Poly-L-lysine;SIGMA P4707、分子量:70,000-150,000)およびPRIMARIA(商標登録)(窒素含有陽イオンを表面に添加した初代培養用プレート)の3種類の培養プレートについて検討した。顕微鏡下の観察では、ポリ-L-リシンとPRIMARIA(商標登録)のプレートでは凝集した細胞が浮遊しており、細胞の接着が弱かったことにより細胞数が減少していた。MTTアッセイ法により生存細胞を測定した結果を図2に示す。
細胞死を検出し易しくする為に、培地中の添加物の検討を行った。フェノールレッドおよびHEPESを含有するRPMI 1640 (GIBCO 22400-089)培地をPR(+)とし、フェノールレッドおよびHEPESを含有しないRPMI 1640 (GIBCO 11835-030)培地をPR(-)として比較検討した。その結果、培地にフェノールレッドを含有しない培地は、細胞死が起こり易かった。この結果を図3に示す。
抑肝散のバイオアッセイ:
上記(1)~(3)の条件を基に、PC12細胞を以下のように培養した。
細胞生存率(%)=[(As-Abs)/(Ac-Abc)]×100
式中、Asは、検体の吸光度(細胞、被検物質添加培地およびMTT溶液の入ったウ
ェル)
Acは、陰性対照の吸光度(細胞、対照培地およびMTT溶液の入ったウェル)
Absは、検体のブランク吸光度(被検物質添加培地およびMTT溶液の入ったウ
ェル)
Abcは、陰性対照のブランク吸光度(対照培地およびMTT溶液の入ったウェル)
Claims (4)
- 培養細胞を培養する培地中に、細胞死を誘発するのに十分な量のグルタミン酸と、抑肝散とを添加し、培地中の培養細胞の生存率から抑肝散の薬理活性価を評価することを特徴とする抑肝散のバイオアッセイ方法。
- 培養細胞が神経系培養細胞である請求項第1項記載の抑肝散のバイオアッセイ方法。
- 培養細胞がPC12細胞である請求項第1項記載の抑肝散のバイオアッセイ方法。
- 培養細胞を培養する培地中のグルタミン酸の濃度が1μM~50mMである請求項第1項ないし第3項の何かに記載の抑肝散のバイオアッセイ方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/936,282 US8497092B2 (en) | 2008-04-03 | 2008-04-03 | Method of bioassaying yokukansan |
PCT/JP2008/056684 WO2009122580A1 (ja) | 2008-04-03 | 2008-04-03 | 抑肝散のバイオアッセイ方法 |
JP2010505237A JP5434909B2 (ja) | 2008-04-03 | 2008-04-03 | 抑肝散のバイオアッセイ方法 |
CN200880128344.3A CN101981443B (zh) | 2008-04-03 | 2008-04-03 | 抑肝散的生物测定方法 |
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JP2003176236A (ja) * | 1993-05-26 | 2003-06-24 | La Jolla Cancer Research Foundation | 疾患の治療的処置および予防のためにbcl−2を用いる方法 |
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US6379714B1 (en) | 1995-04-14 | 2002-04-30 | Pharmaprint, Inc. | Pharmaceutical grade botanical drugs |
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US6930104B2 (en) * | 2001-04-26 | 2005-08-16 | Takeda Chemical Industries, Ltd. | Heterocyclic derivatives |
CA2453189A1 (en) | 2001-07-11 | 2003-01-23 | Ovita Limited | Bioassay for myostatin |
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CN1939453B (zh) | 2006-09-26 | 2010-09-08 | 复旦大学 | 钩藤醇提取物及其在制备靶器官保护药物中的用途 |
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US20090098228A1 (en) | 2007-10-10 | 2009-04-16 | Tsumura & Co. | Agent and method for improvement of impairment of learning and memory |
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JP2003176236A (ja) * | 1993-05-26 | 2003-06-24 | La Jolla Cancer Research Foundation | 疾患の治療的処置および予防のためにbcl−2を用いる方法 |
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US20110027821A1 (en) | 2011-02-03 |
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CN101981443B (zh) | 2014-05-07 |
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