JP5923404B2 - TRPV4 activity inhibitor - Google Patents
TRPV4 activity inhibitor Download PDFInfo
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- JP5923404B2 JP5923404B2 JP2012167588A JP2012167588A JP5923404B2 JP 5923404 B2 JP5923404 B2 JP 5923404B2 JP 2012167588 A JP2012167588 A JP 2012167588A JP 2012167588 A JP2012167588 A JP 2012167588A JP 5923404 B2 JP5923404 B2 JP 5923404B2
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- dimethoxycinnamic acid
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Description
本発明は、TRPV4チャネルの活性化を抑制するTRPV4活性抑制剤に関する。 The present invention relates to a TRPV4 activity inhibitor that suppresses activation of TRPV4 channels.
TRPV4は、カチオンチャネルの一過性受容器電位(TRP)スーパーファミリーのメンバーであり、低浸透圧、温熱(24℃<)、アラキドン酸代謝物などにより活性化されることがわかっている(非特許文献1、2)。 TRPV4 is a member of the transient receptor potential (TRP) superfamily of cation channels and has been shown to be activated by hypotonic pressure, heat (24 ° C <), arachidonic acid metabolites, etc. (non- Patent Documents 1 and 2).
TRPV4は、腎、肺、膀胱、心臓、皮膚、脳、消化管など幅広い組織で発現しており、異なった幅広い生理的役割を果たしていると考えられている。腎の遠位尿細管上皮細胞には特に強く発現しており、尿の浸透圧や流量を感知していると示唆されている(非特許文献3)。また消化管における低浸透圧を感知し、交感神経活動を亢進させる機能を持つことも示唆されている(非特許文献4)。 TRPV4 is expressed in a wide range of tissues such as kidney, lung, bladder, heart, skin, brain and gastrointestinal tract, and is thought to play a wide variety of different physiological roles. It is particularly strongly expressed in the distal tubular epithelial cells of the kidney, and it is suggested that urine osmotic pressure and flow rate are sensed (Non-patent Document 3). It has also been suggested that it has a function of sensing low osmotic pressure in the gastrointestinal tract and enhancing sympathetic nerve activity (Non-patent Document 4).
また最近、TRPV4チャネルは膀胱の機能に関与することが報告されている(非特許文献5)。すなわち、膀胱内側の膀胱上皮細胞に存在するTRPV4やTRPV1が存在し、尿が溜まって膀胱上皮細胞が伸展した場合に当該TRPVチャネルを介して細胞内にカルシウムが流入し、これによってATPが細胞から放出され、膀胱の膨らみが神経に伝わることが明らかにされている。また、TRPV4欠損マウスを用いた検討で、TRPV4の排尿間隔に及ぼす影響はTRPV1より大きいことが報告されている(非特許文献6)。
したがって、TRPV4の活性化を抑制することにより、尿意の増加及び排尿頻度の増加を特徴とする過活動膀胱に治療効果をもたらすと考えられる。
Recently, TRPV4 channels have been reported to be involved in bladder function (Non-patent Document 5). That is, when there is TRPV4 or TRPV1 present in bladder epithelial cells inside the bladder, when urine accumulates and the bladder epithelial cells extend, calcium flows into the cells via the TRPV channel, thereby ATP is removed from the cells. Released, it has been shown that bladder swelling is transmitted to nerves. Moreover, it has been reported by the examination using TRPV4-deficient mice that the effect of TRPV4 on the urination interval is larger than that of TRPV1 (Non-patent Document 6).
Therefore, suppressing the activation of TRPV4 is considered to have a therapeutic effect on overactive bladder characterized by increased urinary intention and increased urination frequency.
一方、ロブスタコーヒーノキ(Coffea canephora var. robusta)等に多く含まれる3,4−ジメトキシけい皮酸は、苦味抑制作用を有すること(特許文献1)、また細菌の細胞膜を損傷させ、当該細菌に対する抗生剤の作用を増強することが報告されている(非特許文献7)。
しかし、3,4−ジメトキシけい皮酸がTRPV4活性抑制作用を有することや過活動膀胱等の膀胱障害に有用であることは知られていない。
On the other hand, 3,4-dimethoxycinnamic acid, which is abundant in Robusta canephora (Coffea canephora var. Robusta) and the like, has a bitterness-inhibiting action (Patent Document 1), and damages the cell membrane of bacteria to give antibiotics against the bacteria. It has been reported that the action of the agent is enhanced (Non-patent Document 7).
However, it is not known that 3,4-dimethoxycinnamic acid has a TRPV4 activity inhibitory action and is useful for bladder disorders such as overactive bladder.
本発明は、過活動膀胱の予防又は改善に有効なTRPV4活性抑制剤を提供することに関する。 The present invention relates to providing a TRPV4 activity inhibitor effective in preventing or improving overactive bladder.
本発明者らは、TRPV4の活性を抑制する素材について検討したところ、3,4−ジメトキシけい皮酸にTRPV4の活性化を効果的に抑制する作用があることを見出した。 When the present inventors examined the material which suppresses the activity of TRPV4, they found out that 3,4-dimethoxycinnamic acid has the effect | action which suppresses the activation of TRPV4 effectively.
すなわち本発明は、3,4−ジメトキシけい皮酸又はその塩を有効成分とするTRPV4活性抑制剤に係るものである。
また本発明は、3,4−ジメトキシけい皮酸又はその塩を有効成分とする過活動膀胱及の予防又は改善剤に係るものである。
That is, the present invention relates to a TRPV4 activity inhibitor containing 3,4-dimethoxycinnamic acid or a salt thereof as an active ingredient.
The present invention also relates to an agent for preventing or improving overactive bladder comprising 3,4-dimethoxycinnamic acid or a salt thereof as an active ingredient.
本発明のTRPV4活性抑制剤は、TRPV4の活性化を効果的に抑制するという作用を有する。したがって、本発明のTRPV4活性抑制剤は、TRPV4チャネルが活性化されることによって生じる症状や疾患を改善するために有用である。具体的には、過活動膀胱(尿意切迫感、頻尿、切迫性尿失禁)を予防又は改善することが可能である。 The TRPV4 activity inhibitor of this invention has the effect | action of suppressing the activation of TRPV4 effectively. Therefore, the TRPV4 activity inhibitor of the present invention is useful for improving the symptoms and diseases caused by the activation of the TRPV4 channel. Specifically, it is possible to prevent or improve overactive bladder (urinary urgency, frequent urination, urge urinary incontinence).
本発明で用いる3,4−ジメトキシけい皮酸は、これを含有する天然物、特に植物から抽出することもでき、化学合成により工業的に製造することもできる。また、市販品を使用することもできる。 The 3,4-dimethoxycinnamic acid used in the present invention can be extracted from natural products containing this, particularly plants, and can be industrially produced by chemical synthesis. Moreover, a commercial item can also be used.
3,4−ジメトキシけい皮酸の塩としては、薬学的に許容される塩であればよく、塩形成用の塩基物質としては、例えば、水酸化リチウム、水酸化ナトリウム、水酸化カリウム等のアルカリ金属の水酸化物;水酸化マグネシウム、水酸化カルシウム等のアルカリ土類金属の水酸化物;アンモニア;アルギニン、リジン、ヒスチジン、オルニチン等の塩基性アミノ酸;モノエタノールアミン、ジエタノールアミン、トリエタノールアミン等の有機塩基が挙げられ、特にアルカリ金属又はアルカリ土類金属の水酸化物が好ましい。
尚、3,4−ジメトキシけい皮酸塩は、上記の塩を調製してから、その塩を医薬又は食品中に添加してもよいし、3,4−ジメトキシけい皮酸と塩形成成分を医薬又は食品中に別々に添加して処方系中で塩を形成することでもよい。
The salt of 3,4-dimethoxycinnamic acid may be a pharmaceutically acceptable salt. Examples of the basic substance for salt formation include alkalis such as lithium hydroxide, sodium hydroxide, and potassium hydroxide. Metal hydroxides; alkaline earth metal hydroxides such as magnesium hydroxide and calcium hydroxide; ammonia; basic amino acids such as arginine, lysine, histidine, ornithine; monoethanolamine, diethanolamine, triethanolamine, etc. Examples thereof include organic bases, and alkali metal or alkaline earth metal hydroxides are particularly preferable.
In addition, 3,4-dimethoxycinnamic acid salt may be added to a pharmaceutical or food after preparing the above salt, or 3,4-dimethoxycinnamic acid and a salt-forming component may be added. It may be added separately to a pharmaceutical or food to form a salt in the formulation system.
3,4−ジメトキシけい皮酸は、後記実施例に示すように、TRPV4刺激物質(アゴニスト)と共に、TRPV4を形質導入した細胞(TRPV4発現細胞)に接触させた場合に、TRPV4刺激物質による細胞内の陽イオン量の流入を抑制するというTRPV4活性抑制作用を有する(実施例)。 3,4-dimethoxycinnamic acid, as shown in the Examples below, is brought into contact with TRPV4 stimulating substances (agonists) and cells transduced with TRPV4 (TRPV4 expressing cells). It has a TRPV4 activity inhibitory action of suppressing the inflow of the amount of cation (Example).
ここで、「TRPV4の活性抑制」とは、受容体であるTRPV4の活性を抑制すること、具体的には例えばTRPV4刺激物質がTRPV4に結合することによって発現する活性、例えばイオン流束の調節能(例えば、細胞外から細胞内へのカルシウムイオン、ナトリウムイオンなどの陽イオンの輸送能など)、膜電位の調節能(例えば、電流の発生能など)を抑制或いは阻害することを云う。 Here, “inhibition of TRPV4 activity” means that the activity of the receptor TRPV4 is suppressed, specifically, for example, the activity expressed by binding of TRPV4 stimulating substance to TRPV4, for example, the ability to regulate ion flux. It refers to suppressing or inhibiting (for example, the ability to transport cations such as calcium ions and sodium ions from the outside of the cell into the cell) and the ability to regulate membrane potential (for example, the ability to generate current).
TRPV4は、膀胱内側の膀胱上皮細胞に存在し、尿が溜まって膀胱上皮細胞が伸びた場合に当該TRPVチャネルを介して細胞内にカルシウムが取り込まれ、これによってATPが細胞表面から放出され、膀胱の膨らみが神経に伝わることが明らかにされている(前記非特許文献5)。したがって、TRPV4の活性を抑制することにより、尿意の増加及び排尿頻度の増加を特徴とする過活動膀胱等に治療効果をもたらすと考えられる。 TRPV4 is present in bladder epithelial cells inside the bladder, and when urine accumulates and the bladder epithelial cells extend, calcium is taken into the cells through the TRPV channel, whereby ATP is released from the cell surface, It has been clarified that the bulge of the worm is transmitted to the nerve (Non-Patent Document 5). Therefore, suppressing the activity of TRPV4 is considered to bring about a therapeutic effect on overactive bladder characterized by increased urinary intention and increased urination frequency.
したがって、3,4−ジメトキシけい皮酸又はその塩は、TRPV4活性抑制のため、或いは過活動膀胱の予防又は改善のために使用することができる。当該使用は、ヒト若しくは非ヒト動物、又はそれらに由来する検体における使用であり得、また治療的使用であっても非治療的使用であってもよい。ここで、「非治療的」とは、医療行為、すなわち治療による人体への処理行為を含まない概念である。 Therefore, 3,4-dimethoxycinnamic acid or a salt thereof can be used for suppressing TRPV4 activity or for preventing or improving overactive bladder. The use can be in humans or non-human animals, or specimens derived therefrom, and can be therapeutic or non-therapeutic. Here, “non-therapeutic” is a concept that does not include a medical act, that is, a treatment act on the human body by treatment.
また、3,4−ジメトキシけい皮酸又はその塩は、TRPV4活性抑制剤、過活動膀胱の予防又は改善剤(以下、TRPV4活性抑制剤等)として使用することができ、さらにこれらの剤を製造するために使用することができる。 Moreover, 3,4-dimethoxycinnamic acid or a salt thereof can be used as a TRPV4 activity inhibitor, a preventive or ameliorating agent for overactive bladder (hereinafter referred to as a TRPV4 activity inhibitor, etc.), and further, these agents are produced. Can be used to
当該TRPV4活性抑制剤等は、それ自体、TRPV4活性抑制、過活動膀胱の予防又は改善効果を発揮する、ヒト若しくは動物用の医薬品、医薬部外品又は食品であってもよく、又は当該医薬品、医薬部外品等に配合して使用される素材又は製剤であってもよい。このとき、当該TRPV4活性抑制剤等には、本発明の3,4−ジメトキシけい皮酸又はその塩を単独で、又はこれ以外に、必要に応じて、後述の配合すべき対象物において許容される担体等を配合してもよい。なお、当該製剤は配合すべき対象物に応じて常法により製造することができる。
また、食品としては、TRPV4活性抑制、過活動膀胱の予防又は改善等の生理機能をコンセプトとし、必要に応じてその旨を表示した飲食品、機能性飲食品、病者用飲食品、特定保健用食品等を包含する。
The TRPV4 activity inhibitor or the like may itself be a drug for humans or animals, a quasi-drug, or a food that exhibits an effect of inhibiting or improving TRPV4 activity, overactive bladder, or the drug, It may be a material or a preparation used by blending with a quasi drug. At this time, the TRPV4 activity inhibitor or the like is allowed in the subject to be blended as described below, alone or in addition to the 3,4-dimethoxycinnamic acid or a salt thereof of the present invention. A carrier or the like may be blended. In addition, the said formulation can be manufactured by a conventional method according to the target object which should be mix | blended.
In addition, as food, the concept is physiological functions such as TRPV4 activity suppression, prevention or improvement of overactive bladder, and food / beverage products, functional food / beverage products, food / beverage products for the sick, specified health Includes food products.
尚、本発明において、「過活動膀胱」とは、尿意切迫感を必須とした症状症候群であり、通常は頻尿と夜間頻尿を伴うものである。 In the present invention, “overactive bladder” is a symptom syndrome in which urinary urgency is essential, and is usually accompanied by frequent urination and nocturia.
上記医薬品(医薬部外品も含む)の剤形は、錠剤、カプセル剤、顆粒剤、散剤、シロップ剤、静脈内注射、筋肉注射剤、坐剤、吸入剤、経皮吸収剤、点眼剤、点鼻剤、湿布剤、パップ剤、軟膏、ローション、クリーム、口腔用製剤等の何れでもよく、投与形態も、経口投与(内用)、非経口投与(外用、注射)の何れであってもよい。
このような種々の剤型の医薬製剤は、3,4−ジメトキシけい皮酸又はその塩を単独で、又は他の薬学的に許容される賦形剤、結合剤、増量剤、崩壊剤、界面活性剤、滑沢剤、分散剤、緩衝剤、保存剤、嬌味剤、香料、被膜剤、担体、希釈剤等を適宜組み合わせることにより調製することができる。
The above pharmaceutical products (including quasi-drugs) include tablets, capsules, granules, powders, syrups, intravenous injections, intramuscular injections, suppositories, inhalants, transdermal absorption agents, eye drops, It may be any of nasal drops, poultices, poultices, ointments, lotions, creams, oral preparations, etc. The administration form may be either oral (internal) or parenteral (external, injection). Good.
Such pharmaceutical preparations of various dosage forms include 3,4-dimethoxycinnamic acid or a salt thereof alone or other pharmaceutically acceptable excipients, binders, extenders, disintegrants, interfaces. It can be prepared by appropriately combining activators, lubricants, dispersants, buffers, preservatives, flavoring agents, fragrances, coating agents, carriers, diluents and the like.
これらの投与形態のうち、好ましい投与形態は経口投与であり、この場合、製剤中の3,4−ジメトキシけい皮酸又はその塩の含有量は、通常0.01質量%以上、好ましくは0.1質量%以上、より好ましくは0.5質量%以上、そして20質量%以下、好ましくは10質量%以下、より好ましくは5質量%以下である。例えば、0.01〜20質量%、好ましくは0.1〜10質量%、より好ましくは0.5〜5質量%が挙げられる。 Among these dosage forms, the preferred dosage form is oral administration. In this case, the content of 3,4-dimethoxycinnamic acid or a salt thereof in the preparation is usually 0.01% by mass or more, preferably 0. 1% by mass or more, more preferably 0.5% by mass or more, and 20% by mass or less, preferably 10% by mass or less, more preferably 5% by mass or less. For example, 0.01-20 mass%, Preferably it is 0.1-10 mass%, More preferably, 0.5-5 mass% is mentioned.
上記食品の形態は、固形、半固形又は液状であり得、例えば、パン類、ケーキ類、麺類、菓子類、ゼリー類、冷凍食品、アイスクリーム類、乳製品、飲料等の各種食品の他、上述した経口投与製剤と同様の形態(錠剤、カプセル剤、シロップ等)が挙げられる。
種々の形態の食品は、3,4−ジメトキシけい皮酸又はその塩を単独で、又は他の食品材料や、溶剤、軟化剤、油、乳化剤、防腐剤、香科、安定剤、着色剤、酸化防止剤、保湿剤、増粘剤等を適宜組み合わせることにより調製することができる。当該食品中の3,4−ジメトキシけい皮酸又はその塩の含有量(抽出物の乾燥物換算)は、通常0.001質量%以上、好ましくは0.005質量%以上、より好ましくは0.01質量%以上であり、そして、10質量%以下、好ましくは5質量%以下、より好ましくは1質量%以下である。例えば、0.001〜10質量%、好ましくは0.005〜5質量%、より好ましく0.01〜1質量%が挙げられる。
The form of the food may be solid, semi-solid or liquid, for example, various foods such as breads, cakes, noodles, confectionery, jelly, frozen foods, ice creams, dairy products, beverages, Examples include the same forms (tablets, capsules, syrups, etc.) as the above-mentioned oral administration preparations.
Various forms of food include 3,4-dimethoxycinnamic acid or its salt alone, or other food ingredients, solvents, softeners, oils, emulsifiers, preservatives, fragrances, stabilizers, colorants, It can be prepared by appropriately combining an antioxidant, a humectant, a thickener and the like. The content of 3,4-dimethoxycinnamic acid or a salt thereof in the food (in terms of a dried product of the extract) is usually 0.001% by mass or more, preferably 0.005% by mass or more, more preferably 0.8%. It is 01 mass% or more, and is 10 mass% or less, preferably 5 mass% or less, more preferably 1 mass% or less. For example, 0.001-10 mass%, Preferably it is 0.005-5 mass%, More preferably, 0.01-1 mass% is mentioned.
本発明のTRPV4活性抑制剤等の投与量又は摂取量は、対象者の状態、体重、性別、年齢又はその他の要因に従って変動し得るが、経口投与又は摂取の場合成人1人当たり、3,4−ジメトキシけい皮酸又はその塩として、1日あたり通常0.1mg以上、好ましくは1mg以上、より好ましくは5mg以上であり、そして1000mg以下、好ましくは300mg以下、より好ましくは5mg以下である。例えば、0.1mg〜1000mg、好ましくは1mg〜300mg、より好ましくは5mg〜100mgが挙げられる。また、上記製剤は、任意の投与計画に従って投与又は摂取され得るが、1日1回〜数回に分けて投与又は摂取することが好ましい。 The dose or intake of the TRPV4 activity inhibitor or the like of the present invention may vary according to the subject's condition, body weight, sex, age or other factors, but in the case of oral administration or intake, 3,4- Dimethoxycinnamic acid or a salt thereof is usually 0.1 mg or more per day, preferably 1 mg or more, more preferably 5 mg or more, and 1000 mg or less, preferably 300 mg or less, more preferably 5 mg or less. For example, 0.1 mg-1000 mg, Preferably 1 mg-300 mg, More preferably, 5 mg-100 mg is mentioned. Moreover, although the said formulation can be administered or ingested according to arbitrary administration schedules, it is preferable to administer or ingest it once to several times a day.
本発明のTRPV4活性抑制剤等の投与又は摂取対象者としては、それを必要としている者であれば特に限定されないが、TRPV4活性抑制及び過活動膀胱の予防又は改善を図ることができることから、特に、尿意切迫感があるヒト、頻尿又は尿漏れのあるヒトへの投与又は摂取が有効である。 The subject of administration or ingestion of the TRPV4 activity inhibitor or the like of the present invention is not particularly limited as long as it is a person who needs it, but in particular, since TRPV4 activity can be suppressed and overactive bladder can be prevented or improved. In addition, administration or ingestion to humans with urgency, frequent urination or urinary leakage is effective.
上述した実施形態に関し、本発明においては以下の態様が開示される。
<1>3,4−ジメトキシけい皮酸又はその塩を有効成分とするTRPV4活性抑制剤。
<2>3,4−ジメトキシけい皮酸又はその塩を有効成分とする過活動膀胱の予防又は改善剤。
With respect to the above-described embodiment, the following aspects are disclosed in the present invention.
<1> A TRPV4 activity inhibitor comprising 3,4-dimethoxycinnamic acid or a salt thereof as an active ingredient.
<2> A preventive or ameliorating agent for overactive bladder comprising 3,4-dimethoxycinnamic acid or a salt thereof as an active ingredient.
<3>TRPV4活性抑制剤を製造するための、3,4−ジメトキシけい皮酸又はその塩の使用。
<4>過活動膀胱の予防又は改善剤を製造するための、3,4−ジメトキシけい皮酸又はその塩の使用。
<5>TRPV4活性抑制に使用するための3,4−ジメトキシけい皮酸又はその塩。
<6>過活動膀胱の予防又は改善に使用するための3,4−ジメトキシけい皮酸又はその塩。
<7>3,4−ジメトキシけい皮酸又はその塩を、それらを必要とする対象に投与又は摂取するTRPV4活性抑制方法。
<8>3,4−ジメトキシけい皮酸又はその塩を、それらを必要とする対象に投与又は摂取する過活動膀胱の予防又は改善方法。
<9>非治療的な方法である前記<7>〜<8>の方法。
<3> Use of 3,4-dimethoxycinnamic acid or a salt thereof for producing a TRPV4 activity inhibitor.
<4> Use of 3,4-dimethoxycinnamic acid or a salt thereof for producing an agent for preventing or improving overactive bladder.
<5> 3,4-dimethoxycinnamic acid or a salt thereof for use in inhibiting TRPV4 activity.
<6> 3,4-dimethoxycinnamic acid or a salt thereof for use in preventing or improving overactive bladder.
<7> A method for inhibiting TRPV4 activity, comprising administering or ingesting 3,4-dimethoxycinnamic acid or a salt thereof to a subject in need thereof.
<8> A method for preventing or improving overactive bladder, comprising administering or ingesting 3,4-dimethoxycinnamic acid or a salt thereof to a subject in need thereof.
<9> The method <7> to <8>, which is a non-therapeutic method.
参考例1 ヒトTRPV4遺伝子発現ベクターの作製
ヒト十二指腸由来細胞株であるHutu−80細胞(American Type Culture Collectionより購入)から抽出したtotalRNAを逆転写して得られたcDNAを鋳型にして、公開されているヒトTRPV4遺伝子配列を参考に合成した、下記に示す塩基配列で表されるオリゴヌクレオチドからなるプライマーセットを用いて、下記の条件下でポリメラーゼ連鎖反応(PCR)を行った。
Reference Example 1 Production of human TRPV4 gene expression vector Published using reverse transcribed totalRNA extracted from human duodenum-derived cell line Hutu-80 cells (purchased from American Type Culture Collection) as a template Polymerase chain reaction (PCR) was performed under the following conditions using a primer set composed of oligonucleotides represented by the following base sequences synthesized with reference to the human TRPV4 gene sequence.
<プライマーセット>
フォワードプライマー;5’-CACCATGGCGGATTCCAGCGAAGGCCC-3’:配列番号1
リバースプライマー;5’-CTAGAGCGGGGCGTCATCAGTCC-3’:配列番号2
<Primer set>
Forward primer; 5'-CACCATGGCGGATTCCAGCGAAGGCCC-3 ': SEQ ID NO: 1
Reverse primer; 5'-CTAGAGCGGGGCGTCATCAGTCC-3 ': SEQ ID NO: 2
<PCR条件>
a) PCR溶液組成
cDNA(Template) 15μl
5x PrimeStar GXL Buffer 10μl
dNTPs mixture (2.5mM) 4μl
PrimeStar GXL DNA Polymerase (タカラバイオ) 1μl
Forward Primer (10μM) 1μl
Reverse Primer (10μM) 1μl
Water 18μl
b) 温度とサイクル条件
95℃ 2min
↓
98℃ 10sec 33 cycles
70℃ 2min
<PCR conditions>
a) PCR solution composition
cDNA (Template) 15μl
5x PrimeStar GXL Buffer 10μl
dNTPs mixture (2.5mM) 4μl
PrimeStar GXL DNA Polymerase (Takara Bio) 1μl
Forward Primer (10μM) 1μl
Reverse Primer (10μM) 1μl
Water 18μl
b) Temperature and cycle conditions
95 ℃ 2min
↓
98 ℃ 10sec 33 cycles
70 ℃ 2min
得られたPCR産物をHigh Pure PCR Product Purification Kit(ロッシュ)用いて精製した。精製したPCR産物と、pcDNA3.1 Directional TOPO Expression Kit(インビトロジェン社)を用いて、発現用ベクターを作製した。 The obtained PCR product was purified using High Pure PCR Product Purification Kit (Roche). An expression vector was prepared using the purified PCR product and pcDNA3.1 Directional TOPO Expression Kit (Invitrogen).
実施例1 ヒトTRPV4発現細胞の作製と細胞内Ca2+流入活性の測定
10%牛胎児血清を含むDMEM/F12培地(インビトロジェン)を用いてHEK293細胞(American Type Culture Collectionより購入)の培養を行った。HEK293細胞をT−75細胞培養用フラスコに5×105cells/Flaskで播種した。培養3日後、参考例1で作製したヒトTRPV4発現ベクター(8μg)をTransIT−293(Mirus)を用いて細胞にトランスフェクションし1日培養した。Detachin(Genlantis)で細胞をはがし96well Optical bottom plate (Nunc)に10%牛胎児血清を含むDMEM/F12培地で1.5×104cells/90μl/wellの細胞密度で播き、さらに1日培養した。
Example 1 Production of human TRPV4-expressing cells and measurement of intracellular Ca 2+ influx activity HEK293 cells (purchased from American Type Culture Collection) were cultured using DMEM / F12 medium (Invitrogen) containing 10% fetal bovine serum. It was. HEK293 cells were seeded at 5 × 10 5 cells / Flash in a T-75 cell culture flask. After 3 days of culture, the human TRPV4 expression vector (8 μg) prepared in Reference Example 1 was transfected into cells using TransIT-293 (Mirus) and cultured for 1 day. The cells were peeled off with Detachin (Genlantis), seeded in DMEM / F12 medium containing 10% fetal bovine serum in 96-well Optical bottom plate (Nunc) at a cell density of 1.5 × 10 4 cells / 90 μl / well, and further cultured for 1 day. .
細胞内Ca2+流入活性の測定はCalcium Kit II− fluo 4(DOJINDO)を用いて行った。fluo4−AM を含有したLoading bufferを上記の細胞に90μl/well添加し、37℃で1時間インキュベートした後、37℃で蛍光プレートリーダーFDSS3000(浜松ホトニクス)により蛍光強度(励起波長;488nm,蛍光波長;524nm)を2秒毎に測定した。測定開始30秒後にTRPV4作動薬であるGSK1016790a(Sigma社)と、以下に示す検体を含有する溶液(GSK1016790a;50nM(終濃度5nM)、検体;終濃度の10倍濃度)を20μl/well添加し、300秒まで2秒毎に蛍光強度変化を測定した。 Intracellular Ca 2+ influx activity was measured using Calcium Kit II-fluo 4 (DOJINDO). 90 μl / well of loading buffer containing fluo4-AM was added to the above cells, incubated at 37 ° C. for 1 hour, and then fluorescence intensity (excitation wavelength; 488 nm, fluorescence wavelength) at 37 ° C. using a fluorescence plate reader FDSS3000 (Hamamatsu Photonics). 524 nm) every 2 seconds. 30 seconds after the start of measurement, 20 μl / well of GSK1016790a (Sigma), a TRPV4 agonist, and a solution containing the following specimens (GSK1016790a; 50 nM (final concentration 5 nM), specimen; 10 times the final concentration) were added. The change in fluorescence intensity was measured every 2 seconds up to 300 seconds.
<検体>
尚、検体は、3,4−ジメトキシけい皮酸(東京化成)、3−メトキシけい皮酸(東京化成)をジメチルスルオキシド(DMSO)(ナカライテスク)で溶解し、使用した。 The specimens used were 3,4-dimethoxycinnamic acid (Tokyo Kasei) and 3-methoxycinnamic acid (Tokyo Kasei) dissolved in dimethyl sulfoxide (DMSO) (Nacalai Tesque).
また、検体のTRPV4活性の阻害率は次式により算出した。
(数1)
阻害率(%)=〔 (F300C1/F0C1−F300/F0)/(F300C1/F0C1−F300C2/F0C2) 〕x 100
F300 ;測定開始300秒後のGSK1016790aと検体を添加したウェルの蛍光強度
F300C1;測定開始300秒後のGSK1016790aとDMSOを添加したウェルの蛍光強度
F300C2;測定開始300秒後のDMSOのみを添加したウェルの蛍光強度
F0 ;測定開始直後のGSK1016790aと検体を添加したウェルの蛍光強度
F0C1 ;測定開始直後のGSK1016790aとDMSOを添加したウェルの蛍光強度
F0C2 ;測定開始直後のDMSOのみを添加したウェルの蛍光強度
Further, the inhibition rate of TRPV4 activity of the specimen was calculated by the following formula.
(Equation 1)
Inhibition rate (%) = [(F300C1 / F0C1-F300 / F0) / (F300C1 / F0C1-F300C2 / F0C2)] x 100
F300: Fluorescence intensity of well added with GSK1016790a and specimen 300 seconds after the start of measurement
F300C1; Fluorescence intensity of wells added with GSK1016790a and DMSO 300 seconds after the start of measurement
F300C2; fluorescence intensity of wells added with DMSO only 300 seconds after the start of measurement
F0: GSK1016790a immediately after the start of measurement and fluorescence intensity of wells to which the sample was added
F0C1; Fluorescence intensity of wells with GSK1016790a and DMSO added immediately after the start of measurement
F0C2; Fluorescence intensity of well added with DMSO only immediately after the start of measurement
<検定方法・結果>
コントロールであるDMSOの阻害率を0%とした時、コントロールに対する検体の阻害率をDunnetにより検定した。結果を表1に示す。
表1より、コントロールに比べて、本発明の3,4−ジメトキシけい皮酸は300μMでTRPV4活性を有意に阻害した。それに対して、3,4−ジメトキシけい皮酸の類縁化合物である比較化合物1に有意な阻害は認められなかった。
<Testing method and results>
When the inhibition rate of DMSO as a control was 0%, the inhibition rate of the specimen relative to the control was assayed by Dunnet. The results are shown in Table 1.
From Table 1, the 3,4-dimethoxycinnamic acid of the present invention significantly inhibited the TRPV4 activity at 300 μM compared to the control. In contrast, no significant inhibition was observed in Comparative Compound 1, which is a related compound of 3,4-dimethoxycinnamic acid.
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