JP2004262849A - Tumor necrosis factor function inhibitor - Google Patents

Tumor necrosis factor function inhibitor Download PDF

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JP2004262849A
JP2004262849A JP2003055172A JP2003055172A JP2004262849A JP 2004262849 A JP2004262849 A JP 2004262849A JP 2003055172 A JP2003055172 A JP 2003055172A JP 2003055172 A JP2003055172 A JP 2003055172A JP 2004262849 A JP2004262849 A JP 2004262849A
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tumor necrosis
necrosis factor
flexibilide
group
formula
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Tomofumi Miyamoto
智文 宮本
Ryuichi Higuchi
隆一 樋口
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Kyushu TLO Co Ltd
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Kyushu TLO Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a tumor necrosis factor function inhibitor comprising a compound safe to human health. <P>SOLUTION: This tumor necrosis factor function inhibitor comprises flexibilide of formula(1) or a flexibilide derivative of formula(2) or a pharmacologically acceptable salt thereof. In formula(2), R is H, OH, F, Cl, Br, I or a (substituted) lower alkoxy; and R<SP>1</SP>is H, OH, a (substituted) lower alkoxy, (substituted) lower acyloxy, amino, a lower alkylamino, di-lower alkylamino or 5- or 6-membered oxygen-containing or nitrogen-containing heterocyclic ring. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、腫瘍壊死因子機能阻害剤に関し、特に、海洋生物由来のジテルペノイドまたはその誘導体を有効成分とする新規な腫瘍壊死因子機能阻害剤に関する。
【0002】
【従来の技術】
腫瘍壊死因子α(TNFα:本明細書中では特に言及しない限り、腫瘍壊死因子とはTNFαを指称する。)は当初、腫瘍の壊死を引き起こす物質として1975年にCarswell等[E. A. Carswell等, Proc. Natl.Acd. Sci., USA, 72, 3666 (1975):非特許文献1]が血中の生理活性蛋白質として報告されたが、その後の研究により炎症や細胞性免疫反応を通し、様々な疾患に関与することが明らかとなり、現在では生体防御にかかわるサイトカインとして理解されている。例えば敗血症性ショック、SLE(全身性エリテマトーデス)、RA(慢性関節リウマチ)などの膠原病、アレルギー疾患、動脈硬化、インスリン抵抗性糖尿病などの代謝性疾患や多発性硬化症、移植、ウィルス性肝炎、HIV感染などの各種感染症など多くの病態にTNFαの過剰産生が関与している。このような疾患に対して、腫瘍壊死因子の機能阻害作用を有する物質を投与することにより病態の改善が行える。
【0003】
マクロファージをはじめとする各種細胞に対して腫瘍壊死因子の産生もしくは分泌を阻害する化合物は数多く知られているが、既に過剰に血中に産生された可溶型腫瘍壊死因子や活性化マクロファージの膜表面に過剰に発現した膜結合型腫瘍壊死因子に対しては無効である。現在、過剰産生あるいは発現した腫瘍壊死因子の機能阻害物質としては天然及び/又は組換えヒト腫瘍壊死因子と反応するモノクローナル抗S. A. Siegel等、Cytokine, 7, 15 (1995):非特許文献2;B. J. Scallon等、Cytokine, 7, 251 (1995):非特許文献3〕、ヒト尿中より精製された腫瘍壊死因子受容体の一部が知られているだけである(特許第2758394号公報:特許文献1)。これらの抗TNF活性阻害物質に関しては高い有効率を示す一方で、安全性に関するデータは十分とは言えず、敗血症や肺炎、結核などの重篤な感染症にかかる副作用がある。また、いずれもタンパク質であることから、製剤としての安定性、ヒトへ投与する場合の投与形態、抗原性の問題など多くの点で問題が残っており、医療現場ではより有効で副作用の少ない、新しい作用機序を有する薬剤が求められている。
【非特許文献1】E. A. Carswell等, Proc. Natl.Acd. Sci., USA, 72, 3666 (1975)
【非特許文献2】S. A. Siegel等、Cytokine, 7, 15 (1995)
【非特許文献3】B. J. Scallon等、Cytokine, 7, 251 (1995)
【特許文献1】特許第2758394号公報
【0004】
【発明が解決しようとする課題】
本発明の目的は過剰産生あるいは発現した腫瘍壊死因子の機能を阻害し、腫瘍壊死因子の過剰産生あるいは発現が関与している多くの疾患の治療に対して有効な化合物を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、上記目的を達成すべく、腫瘍壊死因子のL929細胞に対する殺細胞作用の抑制を活性の指標に日本近海に生息する海洋生物を対象に化合物の探索と評価を行なった結果、沖縄近海に生息するソフトコーラル(Sinularia flexibilis)からセンブラン型ジテルペノイド(フレキシビリド(flexibilide))を単離し、その化学構造を解明し、且つこの物質が優れた腫瘍壊死因子機能阻害作用を有することを見出した。
【0006】
かくして、本発明に従えば、下記の式(1)で表されるフレキシビリドもしくは式(2)で表されるフレキシビリド誘導体またはそれらの薬理学上許容される塩を含有することを特徴とする腫瘍壊死因子機能阻害剤が提供される。
【0007】
【化3】

Figure 2004262849
【0008】
【化4】
Figure 2004262849
【0009】
式(2)中、Rは水素原子、ヒドロキシル基、フッ素、塩素、臭素、ヨウ素、または置換基を有してもよい低級アルコキシ基を表し、Rは水素原子、ヒドロキシ基、置換基を有してもよい低級アルコキシ基、置換基を有してもよい低級アシロキシ基、アミノ基、低級アルキルアミノ基、ジ低級アルキルアミノ基、または5ないし6員環の含酸素、もしくは含窒素異項環を表す。なお、ここで、低級アルコキシ基、低級アシロキシ基、低級アルキルアミノ基、および低級ジアルキルアミノ基における低級とは、通常、炭素数が1〜4であることを指称する。
【0010】
【発明の実施の形態】
本発明の物質フレキシビリド(flexibilide)は、R.Kazlauska等[Aust.J.Chem. 31, 1817 (1978)]及びA.J.Weinheimer等[Tetrahedron Lett. 34, 2923 (1977)]が報告したシヌラリン(Sinularin)と同一であるが、現在までに、このフレキシブリドが腫瘍壊死因子機能阻害作用を有するという報告はない。
【0011】
本発明の腫瘍壊死因子機能阻害剤を構成する上記式(1)のフレキシビリドはソフトコーラルより高収量で得られるので、多くの天然物由来の医薬品開発に見られるような原料供給に関する問題も克服できる。
また、式(2)で表わされるフレキシビリド誘導体は、既知の反応を利用することによって容易に合成することができる。例えば、上記の式(1)のフレキシビリド式をG. Bertiらの方法に従い0.3モルの水酸化カリウム(KOH)でジメチルスルフォキシド(DMSO)/水中、100℃で6時間加熱すれば下記の式(3)のフレキシビリド誘導体が得られる〔G. Berti, B. Macchia, and F. Macchia, Tetrahedron Lett., 3421 (1965)〕。さらに、式(1)のフレキシビリドをG. Bertiらの方法に従いトリクロロ酢酸(CClCOH)を用いベンゼン中加水分解すれば下記の式(4)のフレキシビリド誘導体が得られる〔G. Berti, B. Macchia, and F. Macchia, Tetrahedron Lett., 3421 (1965)〕。また、式(1)のフレキシビリドをC. W. Shoppeeらの方法に従いクロロフォルム(CHCl)中、15℃で塩酸(HCl)すれば下記の式(5)のフレキシビリド誘導体が得られる〔C. W. Shoppee, R. H. Jenkins, and G. H. R. Sumers, J. Chem. Soc., 1657 (1958)〕。
【0012】
【化5】
Figure 2004262849
【0013】
【化6】
Figure 2004262849
【0014】
【化7】
Figure 2004262849
【0015】
本発明の腫瘍壊死因子機能阻害剤は、式(1)で表されるフレキシビリドまたは式(2)で表されるフレキシビリド誘導体の薬理学上許容される塩を包含する。適用可能な塩としては、ナトリウム、カリウム、マグネシウム等の金属との塩が挙げられる。
【0016】
本発明の腫瘍壊死因子機能阻害剤を構成するフレキシビリドは、腫瘍壊死因子機能阻害作用に基づいて、各種疾患に適用でき、所望の薬理効果を期待できる。適用疾患としては、より具体的には例えば、敗血症性ショック、SLE(全身性エリテマトーデス)、RA(慢性関節リウマチ)などの膠原病、アレルギー疾患、動脈硬化、インスリン抵抗性糖尿病などの代謝性疾患や多発性硬化症、移植、ウィルス性肝炎、HIV感染などの各種感染症を例示できる。
【0017】
本発明の腫瘍壊死因子機能阻害剤は、そのまま、または公知の薬学的に許容される担体、賦形剤などと混合した医薬組成物〔例えば、鍵剤、カプセル剤(ソフトカプセル、マイクロカプセルを含む)、液剤、注射剤、坐剤〕として経口的もしくは非経口的に安全に投与することができる。投与量は投与対象、投与ルート、症状などによっても異なるが、例えば、成人には1日あたり通常0.1mg/kg〜40mg/kg体重程度、好ましくは0.5mg/kg〜20mg/kg体重程度である。
【0018】
【実施例】
以下に本発明に従う腫瘍壊死因子機能阻害剤の特徴を更に具体的に明らかにするため実施例を示す。
製造例1:フレキシビリドの調製
沖縄県本部町瀬底島、水深1〜2mで採取したソフトコーラル(Sinularia flexibilis)5.7kgをエタノール3Lでミキサーにて粉砕し、24時間、室温で抽出し、ろ過後、残査をさらにアセトン3Lで2回抽出し、ろ過後、ろ液を併せ、減圧下溶媒留去し、含水エタノール抽出エキス1Lを得た。得た含水エタノール抽出エキスに水1Lを加え2Lの水溶液を調整し、これをジエチルエーテル3L、3L、2Lの計3回分配し、このジエチルエーテル8Lを減圧下濃縮しジエチルエーテルエキス36.109gを得た。このジエチルエーテルエキス1.168gをクロロフォルムに溶解し、ゲルろ過(セファデックスLH−20、ファルマシア社、3.5×55cm)を用いてカラムクロマトグラフィーに付し、クロロフォルム−メタノール(1:1)で溶出し得られた、50フラクション(各10mL)を薄層クロマトグラフィー(シリカゲル60F254、メルク社)により検討し、3個のフラクションFr.1(369.2mg)、Fr.2(859.7mg)、Fr.3(21.5mg)に分画した。
【0019】
このうち腫瘍壊死因子機能阻害作用の確認されたFr.2(859.7mg)をクロロフォルムに溶解し、シリカゲルカラムクロマトグラフィー(Silicagel60、メルク社、5×55cm)に付し、n―ヘキサン−酢酸エチル(75:25)次に(30:7)で溶出し、得られた80フラクション(各10mL)を薄層クロマトグラフィー(シリカゲル60F254、メルク社)により検討し、3個のフラクションFr.2−1(476mg)、Fr.2−2(245mg)、Fr.2−3(268mg)に分画した。このうち腫瘍壊死因子機能阻害作用の確認されたFr.2−2(245mg)を逆相カラムクロマトグラフィー(Lobar RP−8(B)、メルク社、3.5×26cm)に付し、60%メタノール−水で溶出し、得られた100フラクション(各2.5mL)を薄層クロマトグラフィー(RP−8F254、メルク社)により検討し、4個のフラクションFr.2−2−1(2mg)、Fr.2−2−2(4.6mg)、Fr.2−2−3(7.1mg)、Fr.2−2−4(76mg)に分画した。
【0020】
このうち腫瘍壊死因子機能阻害作用の確認されたFr.2−2−4(76mg)をクロロフォルムに溶解し、シリカゲルカラムクロマトグラフィー(Silicagel60、メルク社、2.5×33cm)に付し、n―ヘキサン−酢酸エチル(60:40)、で溶出し、得られた100フラクション(各8mL)を薄層クロマトグラフィー(シリカゲル60F254、メルク社)により検討し、4個のフラクションFr.2−2−4−1(11mg)、Fr.2−2−4−2(10mg)、Fr.2−2−4−3(28mg)、Fr.2−2−4−4(24mg)に分画した。このうち、Fr.2−2−4−2(10mg)に腫瘍壊死因子機能阻害作用が確認され、フレキシビリドと同定した。同定データは以下のとおりである。
【0021】
比旋光度:[α] 28、−100.4°(CHCl、 c=0.9)、マススペクトル(EI−MS);m/z=344(M), 319, 316, 301, 283, 273, 165, 133, 121, 107, 93, 81, 67, 55赤外吸収スペクトル(IR,CHCl3, cm−1);3585, 3012, 2934, 1717, 1619; H−NMR (600MHz, CDCl) δ(ppm):2.08(1H, m, H−1), 1.36(1H, m, H−2), 2.09(1H, m, H−2), 3.97(1H, d, J=11.0, H−3), 1.60(1H, m, H−5), 1.83(1H, dd, J=5.6, 8.5, H−5), 1.85(1H, m, H−6), 2.34(1H, m, H−6), 5.22(1H, t, J=7.9, H−7), 2.05(1H, m, H−9), 2.30(1H, m, H−9), 1.48(1H, m, H−10), 2.07(1H, m, H−10), 2.78(1H, dd, J=4.0, 4.9, H−11), 1.22(1H, m. H−13), 2.05(1H, m, H−13), 1.47(1H, m, H−14), 1.88(1H, m, H−14), 5.67(1H, d, J=2.2, H−17), 6.45(1H, d, J=2.2, H−17), 1.43(3H, s, H−18), 1.64(3H, s, H−19), 1.29(3H, s, H−20); 13C−NMR (150MHz, CDCl)δ(ppm):33.8(d, C−1), 27.8(t, C−2), 82.7(d, C−3), 74.1(s, C−4), 38.6(t, C−5), 22.6(t, C−6), 125.6(d, C−7), 134.5(s, C−8), 35.9(t, C−9), 25.4(t, C−10), 62.9(d, C−11), 58.9(s, C−12), 34.8(t, C−13), 33.0(t, C−14), 140.1(s, C−15), 167.2(s, C−16), 127.9(t, C−17), 24.9(q, C−18), 15.4(q, C−19), 15.4(q, C−20)。
【0022】
試験例1:腫瘍壊死因子機能阻害試験
TNFα感受性マウス繊維芽細胞L929(理化学研究所細胞バンク、RCB1422)(1.0×10cells/mL)を10%馬血清(HS)、0.1mM非必須アミノ酸溶液(NEAA)を加えた0.2mLの培養液[Modified Eagle Medium (MEM), 旭テクノグラス社]に浮遊させ、96穴マイクロプレート(Nunc社)に入れ、5%炭酸ガスインキュベーター(Forma Scientific社)で24時間培養後、培地を1ng/mLTNFα(和光純薬)、0.5μg/mLアクチノマイシンD(和光純薬)を加えた培地0.18mLで交換し、これに、種々の濃度で調整したフレキシビリドの1%エタノール水溶液0.02mLを加え、37℃、5%炭酸ガスインキュベーターで18時間培養した。
これに2mg/mLの3−(4,5−dimethyl−2−thiazolyl)−2,5−diphenyl−2H tetrazolium bromaide(MTT)(シグマ社)0.025mLを加え、さらに4時間培養した。培地を除去し、生成したテトラゾリウム塩をジメチルスルフォキシド(DMSO,和光純薬)0.2mLで溶解し、540nmの波長における吸光度(OD540)をマイクロプレートリーダー(ImmunoMiniNJ−2300,InterMed社)で測定した。TNFαによるL929の細胞毒性阻害活性を図1に示す。また、TNFα機能阻害率は以下の式により算出し、下記の表1に示す。
【0023】
【数1】
Figure 2004262849
【0024】
上記算出式において、([OD540]TNF+フレキシビリド)、([OD540]TNF)、および([OD540]コントロール)は、それぞれ、TNFにフレキシビリドを加えたもの、TNFのみ、およびコントロール(対照)の540nmにおける吸光度の測定値を表す。図1および表1から理解されるように、適当量のフレキシビリドを使用することによりTNFαの機能が効果的に阻害されている。
【0025】
【表1】
Figure 2004262849

【図面の簡単な説明】
【図1】本発明に従って行なったフレキシビリドを用いる腫瘍壊死因子機能阻害実験の結果を示すモノグラフである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tumor necrosis factor function inhibitor, and more particularly, to a novel tumor necrosis factor function inhibitor containing a diterpenoid derived from a marine organism or a derivative thereof as an active ingredient.
[0002]
[Prior art]
Tumor necrosis factor α (TNFα: unless otherwise noted herein, tumor necrosis factor refers to TNFα) was originally described in 1975 by Carswell et al. [E. A. Carswell et al., Proc. Natl. Acc. Sci. , USA, 72 , 3666 (1975): Non-Patent Document 1] was reported as a bioactive protein in blood, but subsequent studies have revealed that it is involved in various diseases through inflammation and cellular immune responses. It is now understood as a cytokine involved in host defense. For example, septic shock, collagen diseases such as SLE (systemic lupus erythematosus), RA (rheumatoid arthritis), allergic diseases, arteriosclerosis, metabolic diseases such as insulin-resistant diabetes and multiple sclerosis, transplantation, viral hepatitis, Over-production of TNFα is involved in many disease states such as various infectious diseases such as HIV infection. For such diseases, the disease state can be improved by administering a substance having a function of inhibiting tumor necrosis factor.
[0003]
Many compounds that inhibit the production or secretion of tumor necrosis factor from macrophages and other cells are known, but the membranes of soluble tumor necrosis factor and activated macrophages already produced in excess in the blood It is ineffective against membrane-bound tumor necrosis factor overexpressed on the surface. Currently, as a function inhibitor of the overproduced or expressed tumor necrosis factor, a monoclonal anti-S. A. Siegel et al., Cytokine, 7, 15 (1995): Non-Patent Document 2; J. Scallon et al., Cytokine, 7, 251 (1995): Non-Patent Document 3], only a part of tumor necrosis factor receptor purified from human urine is known (Japanese Patent No. 2758394: Patent Document). 1). Although these anti-TNF activity inhibitors show a high efficacy rate, the data on the safety are not sufficient, and there are side effects associated with serious infections such as sepsis, pneumonia and tuberculosis. In addition, since both are proteins, there remain many problems such as stability as a preparation, dosage form when administered to humans, antigenicity, etc. Drugs with new mechanisms of action are needed.
[Non-Patent Document 1] A. Carswell et al., Proc. Natl. Acc. Sci. , USA, 72 , 3666 (1975).
[Non-Patent Document 2] A. Siegel et al., Cytokine, 7, 15 (1995).
[Non-Patent Document 3] B. J. Scallon et al., Cytokine, 7, 251 (1995).
[Patent Document 1] Japanese Patent No. 2758394
[Problems to be solved by the invention]
An object of the present invention is to provide a compound which inhibits the function of an overproduced or expressed tumor necrosis factor and is effective for treating many diseases in which overproduction or expression of tumor necrosis factor is involved.
[0005]
[Means for Solving the Problems]
The present inventors have conducted a search and evaluation of compounds for marine organisms living in the waters near Japan with an index of activity to suppress the cell killing effect of tumor necrosis factor on L929 cells in order to achieve the above object. We isolated a sembran-type diterpenoid (flexibilide) from soft coral (Sinularia flexibilis) living in the waters near Okinawa, elucidated its chemical structure, and found that this substance has an excellent inhibitory effect on tumor necrosis factor function. .
[0006]
Thus, according to the present invention, a tumor necrosis characterized by containing a flexibilide represented by the following formula (1) or a flexibilide derivative represented by the following formula (2) or a pharmacologically acceptable salt thereof: A factor function inhibitor is provided.
[0007]
Embedded image
Figure 2004262849
[0008]
Embedded image
Figure 2004262849
[0009]
In the formula (2), R represents a hydrogen atom, a hydroxyl group, fluorine, chlorine, bromine, iodine, or a lower alkoxy group which may have a substituent, and R 1 has a hydrogen atom, a hydroxy group, or a substituent. A lower alkoxy group which may be substituted, a lower acyloxy group which may have a substituent, an amino group, a lower alkylamino group, a di-lower alkylamino group, or a 5- or 6-membered oxygen-containing or nitrogen-containing heterocyclic ring Represents Here, the term “lower” in the lower alkoxy group, the lower acyloxy group, the lower alkylamino group, and the lower dialkylamino group usually indicates that the carbon number is 1 to 4.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The substance flexibilide of the invention is described in R.E. Kazlauska et al. [Aust. J. Chem. 31, 1817 (1978)] and A.I. J. Weinheimer et al. [Tetrahedron Lett. 34, 2923 (1977)], but there is no report to date that this flexibride has an inhibitory effect on tumor necrosis factor function.
[0011]
Since the flexibilide of the above formula (1) constituting the tumor necrosis factor function inhibitor of the present invention can be obtained at a higher yield than soft coral, it is possible to overcome the problems related to the supply of raw materials found in many natural product-derived drug developments. .
Further, the flexibilide derivative represented by the formula (2) can be easily synthesized by utilizing a known reaction. For example, the flexibilide equation of the above equation (1) is described in G. Heating at 100 ° C. for 6 hours in dimethyl sulfoxide (DMSO) / water for 6 hours with 0.3 mol of potassium hydroxide (KOH) according to the method of Berti et al. Gives the flexibilide derivative of the following formula (3) [G. Berti, B .; Macchia, and F.S. Macchia, Tetrahedron Lett. , 3421 (1965)]. Further, the flexibilide of the formula (1) was obtained from G.I. When hydrolyzed in benzene using trichloroacetic acid (CCl 3 CO 2 H) according to the method of Berti et al., A flexibilide derivative of the following formula (4) is obtained [G. Berti, B .; Macchia, and F.S. Macchia, Tetrahedron Lett. , 3421 (1965)]. In addition, the flexibilide of the formula (1) is C.I. W. According to the method of Shoppee et al., Hydrochloric acid (HCl) in chloroform (CHCl 3 ) at 15 ° C. gives a flexibirid derivative of the following formula (5) [C. W. Shoppee, R .; H. Jenkins, and G.J. H. R. Sumers, J.M. Chem. Soc. , 1657 (1958)].
[0012]
Embedded image
Figure 2004262849
[0013]
Embedded image
Figure 2004262849
[0014]
Embedded image
Figure 2004262849
[0015]
The tumor necrosis factor function inhibitor of the present invention includes a pharmacologically acceptable salt of the flexibilide represented by the formula (1) or the flexibilide derivative represented by the formula (2). Applicable salts include salts with metals such as sodium, potassium and magnesium.
[0016]
Flexifide, which constitutes the tumor necrosis factor function inhibitor of the present invention, can be applied to various diseases based on the tumor necrosis factor function inhibitory action, and a desired pharmacological effect can be expected. More specifically, as applicable diseases, for example, septic shock, collagen diseases such as SLE (systemic lupus erythematosus) and RA (rheumatoid arthritis), allergic diseases, arteriosclerosis, and metabolic diseases such as insulin resistant diabetes mellitus and the like. Examples include various infectious diseases such as multiple sclerosis, transplantation, viral hepatitis, and HIV infection.
[0017]
The tumor necrosis factor function inhibitor of the present invention can be used as it is or in a pharmaceutical composition [for example, a key, a capsule (including a soft capsule and a microcapsule)] mixed with a known pharmaceutically acceptable carrier, excipient and the like. Liquid, injection, suppository] can be safely administered orally or parenterally. The dosage varies depending on the administration subject, administration route, symptoms and the like. For example, for adults, usually about 0.1 mg / kg to 40 mg / kg body weight per day, preferably about 0.5 mg / kg to 20 mg / kg body weight. It is.
[0018]
【Example】
Examples are shown below to more specifically clarify the characteristics of the tumor necrosis factor function inhibitor according to the present invention.
Production Example 1: Preparation of flexibilide 5.7 kg of soft coral (Sinularia flexibilis) collected at a depth of 1 to 2 m from Sesokojima, Motobu- cho, Okinawa, was pulverized with 3 L of ethanol using a mixer and extracted at room temperature for 24 hours. After filtration, the residue was further extracted twice with 3 L of acetone. After filtration, the filtrates were combined and the solvent was distilled off under reduced pressure to obtain 1 L of aqueous ethanol extract. 1 L of water was added to the obtained aqueous ethanol extract to prepare a 2 L aqueous solution, which was distributed three times in 3 L, 3 L and 2 L of diethyl ether, and 8 L of this diethyl ether was concentrated under reduced pressure to obtain 36.109 g of diethyl ether extract. Obtained. 1.168 g of this diethyl ether extract was dissolved in chloroform and subjected to column chromatography using gel filtration (Sephadex LH-20, Pharmacia, 3.5 × 55 cm), followed by chloroform-methanol (1: 1). The 50 fractions (10 mL each) obtained by elution were examined by thin-layer chromatography (silica gel 60F254, Merck), and three fractions Fr. 1 (369.2 mg), Fr. 2 (859.7 mg), Fr. 3 (21.5 mg).
[0019]
Among them, Fr. 2 (859.7 mg) was dissolved in chloroform and subjected to silica gel column chromatography (Silicagel 60, Merck, 5 × 55 cm), eluting with n-hexane-ethyl acetate (75:25) and then (30: 7). The obtained 80 fractions (10 mL each) were examined by thin-layer chromatography (silica gel 60F254, Merck), and three fractions Fr. 2-1 (476 mg), Fr. 2-2 (245 mg), Fr. It was fractionated into 2-3 (268 mg). Among them, Fr. 2-2 (245 mg) was subjected to reverse phase column chromatography (Lobar RP-8 (B), Merck, 3.5 × 26 cm), eluted with 60% methanol-water, and the resulting 100 fractions (each 2.5 mL) was examined by thin-layer chromatography (RP-8F254, Merck) and 4 fractions Fr. 2-2-1 (2 mg), Fr. 2-2-2 (4.6 mg), Fr. 2-2-3 (7.1 mg), Fr. It was fractionated into 2-2-4 (76 mg).
[0020]
Among them, Fr. 2-2-4 (76 mg) was dissolved in chloroform, subjected to silica gel column chromatography (Silicagel 60, Merck, 2.5 × 33 cm), and eluted with n-hexane-ethyl acetate (60:40). The obtained 100 fractions (8 mL each) were examined by thin-layer chromatography (silica gel 60F254, Merck), and four fractions Fr. 2-2-4-1 (11 mg), Fr. 2-2-4-2 (10 mg), Fr. 2-2-4-3 (28 mg), Fr. It was fractionated into 2-2-4-4 (24 mg). Of these, Fr. 2-2-4-2 (10 mg) was confirmed to have a tumor necrosis factor function inhibitory effect, and was identified as flexibilide. The identification data is as follows.
[0021]
Specific rotation: [α] D 28 , -100.4 ° (CHCl 3 , c = 0.9), mass spectrum (EI-MS); m / z = 344 (M) + , 319, 316, 301, 283, 273, 165, 133, 121, 107, 93, 81, 67, 55 infrared absorption spectrum (IR, CHCl 3, cm −1 ); 3585, 3012, 2934, 1717, 1619; 1 H-NMR (600 MHz , CDCl 3 ) δ (ppm): 2.08 (1H, m, H-1), 1.36 (1H, m, H-2), 2.09 (1H, m, H-2), 3. 97 (1H, d, J = 11.0, H-3), 1.60 (1H, m, H-5), 1.83 (1H, dd, J = 5.6, 8.5, H-) 5), 1.85 (1H, m, H-6), 2.34 (1H m, H-6), 5.22 (1H, t, J = 7.9, H-7), 2.05 (1H, m, H-9), 2.30 (1H, m, H-9) ), 1.48 (1H, m, H-10), 2.07 (1H, m, H-10), 2.78 (1H, dd, J = 4.0, 4.9, H-11). , 1.22 (1H, m, H-13), 2.05 (1H, m, H-13), 1.47 (1H, m, H-14), 1.88 (1H, m, H-). 14), 5.67 (1H, d, J = 2.2, H-17), 6.45 (1H, d, J = 2.2, H-17), 1.43 (3H, s, H) -18), 1.64 (3H, s, H-19), 1.29 (3H, s, H-20); 13 C-NMR (150 MHz, CDCl 3 ) δ (ppm): 33.8 (d) , C-1), 27.8 (t, C-2), 82.7 (d, C-3), 74.1 (s, C-4), 38.6 (t, C-5), 22.6 (t, C-2) C-6), 125.6 (d, C-7), 134.5 (s, C-8), 35.9 (t, C-9), 25.4 (t, C-10), 62 .9 (d, C-11), 58.9 (s, C-12), 34.8 (t, C-13), 33.0 (t, C-14), 140.1 (s, C) -15), 167.2 (s, C-16), 127.9 (t, C-17), 24.9 (q, C-18), 15.4 (q, C-19), 15. 4 (q, C-20).
[0022]
Test Example 1: Tumor necrosis factor function inhibition test TNFα-sensitive mouse fibroblast L929 (RIKEN Cell Bank, RCB1422) (1.0 × 10 5 cells / mL) (10% horse serum (HS), 0.1 mM non- The cells were suspended in 0.2 mL of a culture solution [Modified Eagle Medium (MEM), Asahi Techno Glass Co., Ltd.) to which an essential amino acid solution (NEAA) was added, placed in a 96-well microplate (Nunc), and placed in a 5% carbon dioxide gas incubator (Forma). (Scientific) for 24 hours, and the medium was replaced with 0.18 mL of a medium to which 1 ng / mL TNFα (Wako Pure Chemical) and 0.5 μg / mL actinomycin D (Wako Pure Chemical) were added. Add 0.02 mL of a 1% aqueous solution of flexibilide in ethanol adjusted at 37 ° C, 5% charcoal And cultured for 18 hours in a gas incubator.
To this, 0.025 mL of 2 mg / mL of 3- (4,5-dimethyl-2-thiazolyl) -2,5-diphenyl-2H tetrazolium bromide (MTT) (Sigma) was added, and the mixture was further cultured for 4 hours. After removing the medium, the resulting tetrazolium salt was dissolved in 0.2 mL of dimethyl sulfoxide (DMSO, Wako Pure Chemical), and the absorbance (OD 540 ) at a wavelength of 540 nm was measured using a microplate reader (ImmunoMini NJ-2300, InterMed). It was measured. The cytotoxicity inhibitory activity of L929 by TNFα is shown in FIG. The TNFα function inhibition rate was calculated by the following equation and is shown in Table 1 below.
[0023]
(Equation 1)
Figure 2004262849
[0024]
In the above formula, ([OD 540 ] TNF + flexibilide), ([OD 540 ] TNF), and ([OD 540 ] control) are TNF plus flexibilide, TNF only, and control (control), respectively. Represents the measured value of the absorbance at 540 nm. As can be seen from FIG. 1 and Table 1, the use of an appropriate amount of flexibilide effectively inhibited the function of TNFα.
[0025]
[Table 1]
Figure 2004262849

[Brief description of the drawings]
FIG. 1 is a monograph showing the results of a tumor necrosis factor function inhibition experiment using flexibilide performed in accordance with the present invention.

Claims (1)

下記の式(1)で表わされるフレキシビリドもしくは式(2)で表されるフレキシビリド誘導体またはそれらの薬理学上許容される塩を含有することを特徴とする腫瘍壊死因子機能阻害剤。
Figure 2004262849
Figure 2004262849
〔式(2)中、Rは水素原子、ヒドロキシル基、フッ素、塩素、臭素、ヨウ素、または置換基を有してもよい低級アルコキシ基を表し、また、Rは水素原子、ヒドロキシ基、置換基を有してもよい低級アルコキシ基、置換基を有してもよい低級アシロキシ基、アミノ基、低級アルキルアミノ基、ジ低級アルキルアミノ基、または5ないし6員環の含酸素もしくは含窒素異項環を表す。〕
A tumor necrosis factor function inhibitor comprising a flexibilide represented by the following formula (1) or a flexibilide derivative represented by the formula (2) or a pharmacologically acceptable salt thereof.
Figure 2004262849
Figure 2004262849
[In the formula (2), R represents a hydrogen atom, a hydroxyl group, fluorine, chlorine, bromine, iodine, or a lower alkoxy group which may have a substituent, and R 1 represents a hydrogen atom, a hydroxy group, a substituted A lower alkoxy group which may have a group, a lower acyloxy group which may have a substituent, an amino group, a lower alkylamino group, a di-lower alkylamino group, or a 5- or 6-membered ring containing oxygen or nitrogen. Represents a ring. ]
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2278982A2 (en) * 2008-04-09 2011-02-02 Marine Bio Co., Ltd. Compositions and methods for treating neurodegenerative diseases
CN102626406A (en) * 2012-03-23 2012-08-08 中国科学院南海海洋研究所 Application of cembranoid diterpene flexibilide or medicinal salt thereof in preparation of PGC-1alpha inhibitor
CN109718192A (en) * 2019-01-21 2019-05-07 厦门大学 Marine soft coral extract and application thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2278982A2 (en) * 2008-04-09 2011-02-02 Marine Bio Co., Ltd. Compositions and methods for treating neurodegenerative diseases
EP2278982A4 (en) * 2008-04-09 2011-06-29 Marine Bio Co Ltd Compositions and methods for treating neurodegenerative diseases
CN101990436B (en) * 2008-04-09 2012-12-12 海洋生物有限公司 Compositions and methods for treating neurodegenerative diseases
CN102626406A (en) * 2012-03-23 2012-08-08 中国科学院南海海洋研究所 Application of cembranoid diterpene flexibilide or medicinal salt thereof in preparation of PGC-1alpha inhibitor
CN109718192A (en) * 2019-01-21 2019-05-07 厦门大学 Marine soft coral extract and application thereof
CN109718192B (en) * 2019-01-21 2021-11-16 厦门大学 Short finger soft coral extract and its use

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