JP5923167B2 - 抗b型肝炎薬の調製のためのアンドログラホリドc15位置換シリーズ誘導体の使用 - Google Patents
抗b型肝炎薬の調製のためのアンドログラホリドc15位置換シリーズ誘導体の使用 Download PDFInfo
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- JP5923167B2 JP5923167B2 JP2014517429A JP2014517429A JP5923167B2 JP 5923167 B2 JP5923167 B2 JP 5923167B2 JP 2014517429 A JP2014517429 A JP 2014517429A JP 2014517429 A JP2014517429 A JP 2014517429A JP 5923167 B2 JP5923167 B2 JP 5923167B2
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- andrographolide
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- C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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Description
A: R1=H,R2=4-Cl-C6H4,R3=R4=H;
B: R1=H,R2=C6H5,R3=R4=H;
C: R1=H,R2=4-F-C6H4,R3=R4=H;
D: R1=H,R2=4-F-C6H4,R3=R4=COR5,R5=C5H4N;
E: R1=H,R2=4-Br-C6H4,R3=R4=H;
F: R1=H,R2=3-Br-C6H4,R3=R4=COR5,R5=C5H4N;
G: R1=H,R2=2,4,5-triMeO-C6H2,R3=R4=H。
1、細胞培養と薬剤処理
ヒトB型肝炎ウイルス遺伝子を転染したヒト肝癌HepG2.2.15細胞を用いて、本発明薬剤のHepG2.2.15細胞培養液上清中のHBV分泌表面抗原(HBsAg)に対する影響を測定した。HepG 2.2.15 細胞懸濁液を48ウェルプレートに接種した。細胞数は1.25×104/ウェル、RPMI1640培養液を0.5 mL加え、培養液には、体積分数10%のウシ胎児血清、380μg/mL G418、100μg/mLストレプトマイシン、100 IU/mL ペニシリンが含まれ、体積分数5%のCO2の二酸化炭素培養箱に置いて37℃で培養し、24時間の後薬剤含有培養液を取り換え、薬剤濃度は5つの勾配を設けた。ラミブジン(lamivudine, 3TC)を陽性薬剤対照とした。それぞれ3d、6d培養した後に一回培養液を取り換え、培養9日目に培養ウェル中の上清液を取り出し、HBsAg検出を行った。プレート中の細胞はMTT法で細胞活性を測定した。
細胞培養9d後、各ウェルの上清液を吸い上げ、ウェル毎に濃度0.5mg/mL MTT [3-(4,5-ジメチルチアゾール-2−イル)-2,5-ジフェニルテトラゾリウムブロミド)] のPBS 溶液を100μL加え、37 ℃で4 時間培養し、培養液を捨て、ウェル毎に100μLのジメチルスルホキシドを加え、10分間振とうし、プレートリーダーで490 nm におけるA 値を測定し、空白対照ウェルのA 値と比較し、空白対照ウェルの細胞生存率を100%とし、各ウェルの生存細胞百分率を計算した。
B型肝炎ウイルス表面抗原診断キット(市販品)を用いて、説明書の操作に基づきHBsAgを検出した。プレートリーダー(米国BIO-TEK社Powerwave X型)により二波長比色を利用した。測定波長は450nmであり、参考波長は630nmであり、各ウェルのOD値を読み取った。薬剤のHBsAgに対する抑制率と治療指数を計算した。
抑制率=[対照ウェルOD - 実験ウェルOD] ÷ 対照ウェルOD ×100%。
治療指数(TI)=半数毒性濃度(TC50)/半数有効濃度(IC50)。
そのうち、TI≧2は有効で低毒である。
アンドログラホリド誘導体に対してスクリーニングを行い、本発明に記載の化合物A-GはHepG2.2.15細胞培養液の上清中のHBV表面抗原HBsAgの含有量を顕著に低減し、時間、用量に依存性を呈することが判明した。図1に示すように、化合物は9日間にわたって作用すると、HBsAgに対するIC50値がいずれも4.0μmol/L未満であった。陽性対照物であるラミブジンのIC50値は約10μg/mL (43.67μmol/L)であった。
1、実験動物及材料:チェリバレー種アヒル、雄、某アヒル飼育場から購入し、DHBV陽性血清は本実験室で収集し保存した。
1日齢のチェリバレー種アヒルに対し、頸静脈から無菌で約200μLの血液を採集し、血清を分離し、DNAを抽出し、普通のPCR方法により先天DHBV陰性を検出スクリーニングし、身体状況がほぼ一致するアヒル雛を実験用に供した。3日齢の陰性アヒルに対し、DHBV陽性アヒル血清(200μL/羽)を大腿静脈より注射して毒を下し、感染7日後に頸静脈から採血し、血清を分離し、PCR検出で陽性であるものに対して群分けして投与した。動物は毎朝体重に応じて1回/日、1mL/200gを空腹胃内投与した。まず、構造が代表的な化合物を選んで初期スクリーニングし、5日間投与し、無菌操作で頸静脈から採血し、血清を分離し、血清中のDHBV-DNAコピー数を分析し、抑制率を計算した。さらに、活性が比較的良い化合物Aを選び、2週間投与し(1回/日)、それぞれ投与後7d、14d、投与終止後5dに頸静脉から採血し、血清を分離し、血清中のDHBV-DNAコピー数を分析し、抑制率を計算した。投与後14d、一部の実験アヒルを死なせ、少量の肝組織を取り出し、4%のオリゴポリホルムアルデヒド溶液に固定し、通常のHE染色病理検査を行った。血清中のDHBV-DNAの測定にはSYBR GreenI蛍光定量PCR測定方法[揚州大学学報(農業と生命科学版);2010,31(3)]を用いた。
DHBV-DNA抑制率(%)=(モデル群copies-投与群copies) /モデル群copies×100%
図3、図4に示すように、5d投与すると、各試験化合物は、いずれも血清中のDHBV-DNAのコピー数を顕著に低減し、モデル群に比べP<0.05、そのうち化合物Aの抑制率は57.8%に達し、モデル群に比べP<0.01。これは本発明の化合物の体内での抗DHBV作用が明らかであることを説明している。さらに、化合物Aを代表として、7d、14d投与した後、及び投与終止後5dに血清中のDHBV-DNAのコピー数に対する影響を研究した。その結果、モデル群に比べ、化合物Aの低、高用量群はいずれも血清中のDHBV-DNAのコピー数を顕著に低減し、投与終止後5dまで、化合物Aの抗DHBV効果は基本的に維持された。ラミブジンは20mg/kg(図3)及び50mg/kg用量(図4)において、投与期間にDHBV-DNAに対する抑制作用はいずれも比較的強いが、投与終止後、重いリバウンド現象が現れた。
動物:クリーングレード昆明種マウス、体重20±2g、雄性と雌性はそれぞれ半分、河南省実験動物中心より提供。合格証明書番号:0009898。
薬剤:本発明に記載の化合物A〜G。
実験方法:動物をランダムに群分けし、禁食12時間後(水は制限しない)、それぞれ用量5.00g/kgの化合物A〜Gを1回で胃内投与した。動物の状態を観察、記録し、中毒表現の有無を観察した。結果を表1に示す。
実験結果:マウスに明らかな中毒表現は見られず、死亡に至るものはなかった。これは、この種の化合物の急性毒性が極めて弱いことを説明している。抗B型肝炎薬を調製するための用途として、比較的良い実用性と開発価値を有する。
Claims (3)
- さらに他の医薬品と組み合わせた、並びに/又は製薬的に許容可能な補助及び/若しくは添加成分を混合した、経口型製剤、又は注射型製剤であることを特徴とする請求項1に記載の医薬組成物。
- 経口型製剤が錠剤、丸剤、カプセル、顆粒剤、又はシロップであり、注射型製剤が注射液又は凍結乾燥粉末製剤であることを特徴とする請求項2に記載の医薬組成物。
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CN201110184294.4 | 2011-07-04 | ||
PCT/CN2012/078083 WO2013004171A1 (zh) | 2011-07-04 | 2012-07-03 | 穿心莲内酯c15位取代系列衍生物在制备抗乙型肝炎药物中的应用 |
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US9388169B2 (en) | 2012-02-10 | 2016-07-12 | Zhengzho University | Use of 15-benzylidene-14-deoxy-11, 12-dehydroandrographolide derivative in manufacture of medicaments for protecting liver and anti-hepatitis C virus |
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