JP6558757B2 - 抗腫瘍剤 - Google Patents
抗腫瘍剤 Download PDFInfo
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- JP6558757B2 JP6558757B2 JP2015213860A JP2015213860A JP6558757B2 JP 6558757 B2 JP6558757 B2 JP 6558757B2 JP 2015213860 A JP2015213860 A JP 2015213860A JP 2015213860 A JP2015213860 A JP 2015213860A JP 6558757 B2 JP6558757 B2 JP 6558757B2
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- tumor
- leukotriene
- cells
- tumors
- apoptosis
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Classifications
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- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/47—Quinolines; Isoquinolines
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- A—HUMAN NECESSITIES
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
- A61K31/403—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with carbocyclic rings, e.g. carbazole
- A61K31/404—Indoles, e.g. pindolol
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- A—HUMAN NECESSITIES
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
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Description
飼育中に腫瘍を自然発症したSprague-Dawleyラット(以下、担腫瘍ラット)を日本チャールズリバー株式会社より購入し、実験に用いた。観察された腫瘍は全て乳腺腫瘍(腺癌及び腺腫)であった。また、これらは全て自然発症(spontaneous)の腫瘍であり、ヒトを含む哺乳動物の発がん要因を含む腫瘍発生の諸条件を踏まえた担がん動物である。
比較例1:無治療の担腫瘍ラットの腫瘍病変標本の観察(3症例)
エーテル麻酔下において担腫瘍ラットから腫瘍組織を摘出した。摘出腫瘍を固定後、光学顕微鏡(ヘマトキシリン・エオジン染色)標本及び電子顕微鏡(ウラン・鉛重染色)標本を作製し観察した。
担腫瘍ラットに対し、モンテルカストナトリウムを活性成分とするロイコトリエン阻害剤(ロイコトリエン受容体拮抗剤、商品名「シングレア錠」、MSD株式会社製)を、モンテルカストナトリウムとして1日当たり0.16mg/kg体重の投与量で最長7日間経口投与し、エーテル麻酔下において腫瘍組織を3日目および7日目に摘出した。比較例1と同様に、摘出腫瘍を固定後、光学顕微鏡(ヘマトキシリン・エオジン染色)標本及び電子顕微鏡(ウラン・鉛重染色)標本を作製し観察した。
担腫瘍ラットに対し、ザフィルルカストを活性成分とするロイコトリエン阻害剤(ロイコトリエン受容体拮抗剤、商品名「アコレート」、アストラゼネカ株式会社製)を、ザフィルルカストとして1日当たり1.33mg/kg体重の投与量で最長7日間経口投与し、エーテル麻酔下において腫瘍組織を3日目および7日目に摘出した。比較例1と同様に、摘出腫瘍を固定後、光学顕微鏡(ヘマトキシリン・エオジン染色)標本及び電子顕微鏡(ウラン・鉛重染色)標本を作製し観察した。
担腫瘍ラットに対し、プランルカスト水和物を活性成分とするロイコトリエン阻害剤(ロイコトリエン受容体拮抗剤、商品名「オノン」、小野薬品工業株式会社製)を、プランルカスト水和物として1日当たり7.5mg/kg体重の投与量で最長7日間経口投与し、エーテル麻酔下において腫瘍組織を3日目および7日目に摘出した。比較例1と同様に、摘出腫瘍を固定後、光学顕微鏡(ヘマトキシリン・エオジン染色)標本及び電子顕微鏡(ウラン・鉛重染色)標本を作製し観察した。
担腫瘍ラットに対し、ジロートンを活性成分とするロイコトリエン阻害剤(ロイコトリエン生合成阻害剤、商品名「ZYFLO」、アボットラボラトリーズ製)を、ジロートンとして1日当たり34.3mg/kg体重の投与量で最長7日間経口投与し、エーテル麻酔下において腫瘍組織を3日目および7日目に摘出した。比較例1と同様に、摘出腫瘍を固定後、光学顕微鏡(ヘマトキシリン・エオジン染色)標本及び電子顕微鏡(ウラン・鉛重染色)標本を作製し観察した。
比較例1の無治療担腫瘍ラット腫瘍組織像と比較して、ロイコトリエン阻害剤である、モンテルカストナトリウム(ロイコトリエン受容体拮抗剤、実施例1)、ザフィルルカスト(ロイコトリエン受容体拮抗剤、実施例2)、プランルカスト水和物(ロイコトリエン受容体拮抗剤、実施例3)及びジロートン(ロイコトリエン生合成阻害剤、実施例4)による治療を施した全ての担腫瘍ラットの腫瘍細胞において、投与3日目には既に部分的にアポトーシスが誘導され、腫瘍細胞の進展・増殖の抑制効果が顕著に認められた。
パラフィン切片を用いて、各種腫瘍組織内にロイコトリエン受容体が存在するかどうかを、ロイコトリエン受容体抗体(Polyclonal Antibody to CysLT1およびPolyclonal Antibody to CysLT2:Acris Antibodies社)を用いた、免疫染色法(シンプルステインMAX-PO法:ニチレイ社)により確認した。確認を行った腫瘍組織を表1に示す。
Claims (2)
- システイニルロイコトリエン受容体へのロイコトリエンの結合を介したシグナル伝達経路を阻害する能力を指標とする、腫瘍の治療剤若しくは予防剤、腫瘍に伴う疼痛の緩和剤又は間質増生阻害剤(ただし、転移抑制剤及び毛細血管透過性抑制剤を除く)のスクリーニング方法。
- システイニルロイコトリエン受容体へのロイコトリエンの結合を阻害する能力を指標とする、請求項1記載の方法。
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